Comsol port numeric. To propagate the monochromatic light of 1550nm (1.

Comsol port numeric I have seen that while exciting, the core and cladding need to be selected as port boundaries. I'm trying to make the two The RF interfaces have built-in support for S-parameter calculations. Finally, there is a User defined option where the port mode shape, Numeric ports require a Boundary Mode Analysis study type. It's a good way to simulate an ideal "dummy load. This option requires the use of a Boundary Mode Analysis step in the study. In this case a boundary mode problem is solved on the port face to compute the There are multiple ways to excite and terminate a CPW using ports or lumped ports. The model uses two numeric ports per input and exit boundary (see Figure 1). NEW In the New window, click Model Wizard. Send Private Message Flag post as spam. In Study 2, the electric field is solved for using the Electromagnetic Waves, Frequency Port 1 1 In the Physics toolbar, click Boundaries and choose Port. Figure 1). 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> 4 | MODELING OF A CPW USING NUMERIC TEM PORTS NEW In the New window, click Model Wizard. settings window, locate the . 2 In the Select Physics tree, select Radio Frequency>Electromagnetic Waves, Frequency Domain (emw). 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> I'm a beginner in Comsol and I want to model a single mode silicon waveguide with SiO2 cladding (and something more complicated later) in 3D. When the port sweep is activated, the options in the Incident Mode Settings in the port conditions are deactivated and COMSOL controls which port that is excited with an incident mode. 0 Replies Last Post Apr 30, 2016, 6:22 p. From the . 4 From the Type of port list, choose Numeric. ) Of course I changed the type of port to 'user defined' and 'rectangular' But the result of TE was not same as numeric port. 3 From the Type of port list, choose Numeric. 2011, 07:54 GMT-4 RF & Microwave Engineering Version 4. However, I always get errors with the lumped ports (except if I define the width and length manually). Coil type is not circular. Results and Discussion. The characteristic impedance of a Numeric port is defined by the ratio between the voltage and current. It should appear before the Frequency Domain study step. I want to use numeric ports and I have to set a specific polarization of the incident light. Since I just use the same method, it's wierd to see a simulation result in 3D is totally different as 2D. The Numeric port option is used for waveguide cross sections that are neither circular nor rectangular. I had my analyses for my ports as separate studies and they don't "talk". I The numeric port type cannot address the common mode or differential mode cases. Can I set numeric port in this To just test out the waters, I'm trying to simulate a very simple setup with just a single rectangle of air. Download Files; The COMSOL Sales and Support teams are available for answering any questions you may have regarding this. window, under . We explain how to set up a circular waveguide port and review the analytical solution that defines the port mode field. Learn how to model antennas efficiently and accurately using COMSOL Multiphysics®. Side-by-side images of the model tree with the integration lines highlighted on the left and an image of the numeric TEM-type port model on the right. Since the Port will not be used directly in the ultimate analysis, give it a Port number of 0 to clearly differentiate it. Settings. But in my model i get reflectance value almost 1 no any transmission, but physically i should get 100% transmission because my geometry is like I am giving light from above port and light is passing through glass slab and collection is taking place at port 2. Port Properties. Information about its effective index is obtained via a The numeric port names are also required for the port sweep functionality. There are two waveguides. After also opening port 1807 on our firewall, he was able to connect to the license server fine. If more than one numeric port is needed, use one Boundary Mode Analysis node per port and assign each to 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. I don't know where is wave port in comsol. In the study, add one Boundary Mode Analysis step for each Numeric port and make sure to reference the proper Port name in - port 1 at the base of the core (input, numeric port, wave excitation at this port ON, power 1 W); - port 2 at the other base of the core (output, numeric port, wave excit. Port or lumped port: Numeric TEM port Network analyzer or spectrum analyzer measuring far-field radiation pattern; Computer-controlled measurement turntable; Far-field domain and calculation Port features can be used to excite and terminate a grounded CPW. 9e14 Hz, 2. Type of port. Posted Jun 14, 2021, 3:45 a. Right: The boundary selection of the uniform lumped port at the end of a microstrip line filter. The numeric port type cannot address the common mode or differential mode cases. Study Step1 Boundary Mode Analysis Port 1 1 In the Physics toolbar, click Boundaries and choose Port. Numeric port is defined by the ratio The Boundary Mode Analysis study and study step are used to compute the propagation constants or wave numbers as well as propagating mode shapes, for a given frequency at a port. 3 or something like that there is an example of a dielectric slab If it is important to capture the fringing field, you can use a numeric port with the TEM option. When modeling the In the coupled_line_filter or cpw_bandpass_resonator models they use lumped ports with the option 'cable'. In COMSOL5. In this tutorial, a basic CPW circuit is modeled using Numeric type ports with the Analyze as a TEM In the RF module, is it possible to import a numeric port instead of automatically using the result of a Boundary Mode Analysis? I'm finding the normal way of doing it to be This tutorial example shows how to set up port features in a physics interface when designing a grounded coplanar waveguide (GCPW) circuit that is useful for mmWave applications. It should be placed before the Frequency Domain step. Posted Jan 7, 2013, 8:44 p. Select a Type of port : User defined (the default), Numeric , Circular , Rectangular , or Slit . 10. 2 to Figure 5 shows the results of the initial boundary mode analysis. 5 When you use Ports of the Periodic type and when you add Diffraction order ports, you also get reflectance and transmittance variables with names based on the mode number, instead of the port name. The field BLOG Как использовать Numeric-порты при моделировании СВЧ-устройств; KNOWLEDGE BASE Solving electromagnetic heating models with high-frequency loads; BLOG How to Use Numeric Ports in Your RF Analyses; FORUM numeric coil type; BLOG Guidelines for Modeling Rotating Machines in 3D From the amplitude definitions above, it is clear that in-plane modes are polarized in the plane spanned by the port normal n and the mode wave vector k m, whereas out-of-plane modes have a polarization that is orthogonal to this plane. To excite the wave at the input boundary and to absorb the wave at the output boundary, two numeric ports per boundary are used. Use one Boundary Mode Analysis node per Numeric port and assign each to the appropriate port. a TEM If you have a square metallic waveguide, you can use an analytic port and select TE01 or TE10. Then, it is best to add all the studies; Boundary Mode Analysis 1, Boundary Mode Analysis 2, , Frequency Domain 1 Solved with COMSOL Multiphysics 4. Rectangular, Coaxial, and Circular Ports are predefined. Hello Majd, The events interface is meant for transient (time-domain) simulations, and wouldn’t be applicable for stationary (frequency-domain) problems. section. I tried to use "user defined " port. I cannot understand the difference between them (priodic, numeric, ), so I dont know when to use them. 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> It is also possible to control the service port used with the command line option -serviceport XXXX, where XXXX is the wanted port number. A Two-Port Network can only be applied on boundaries that extend between two metallic boundaries — that is, boundaries where Perfect Electric Conductor , Impedance Boundary , or Transition Boundary The Integration Line for Voltage is available only in 3D from the context menu (right-click the Port node) when the Analyze as a TEM field check box is selected under the Port Properties section for the Port node. Here, only the TE 0 mode can propagate. The port name is automatically incremented by one every time a port condition is added. Note that while COMSOL employees may participate in the discussion Port 1 1 In the Physics toolbar, click Boundaries and choose Port. The node should look like this. 5 4 | MODELING OF A CPW USING NUMERIC TEM PORTS NEW In the New window, click Model Wizard. For instance, if you add a Diffraction order port to the same boundary as your exciting port, in 2D geometry, with mode number m = 1 and in-plane polarization, you get However, the frequency domain study step leads to strange result : when I plot the transverse magnetic field in the structure for a waveguide with gain, there seems to be a lot of reflection at the “out” port causing the field to explode not only towards the “out” port but also coming back towards the “in” port (at the start/left of the waveguide - see image). This feature includes enhanced functionality, utilizing the techniques behind the calculation of impedance in The Numeric port options is used for waveguide cross sections that are neither circular nor rectangular. Can anyone help me with the chioce of the ports? In 'real life', the rf signal is fed in by several aluminum bond wires. 935e14 Hz ), I've put two extremity of the length of Silicon waveguide1 and waveguide2 as "excitation port1 and port2"(type "numeric", input power:1watt) I am trying to simulate a CPW resonator in 3D. If using a regular lumped port then being at a return path would be necessary for one of the conductors. If more than one numeric port is needed, use one Boundary Mode Analysis node per port and assign each to the appropriate port. So if, say, you have two ports, you first add a study from the wizard that has boundary mode analysis. Select a Type of Port — Cable (the default), Current, or Circuit. If more than one numeric port is needed, use one Boundary Mode Analysis node per port and assign each to S-Parameter Variables • Port Sweeps/Manual Terminal Sweeps and Touchstone Export A uniform waveguide with two ports that support multiple modes. The numeric port names are also required for port sweep functionality. - wave equation everywhere; STUDY (here I follow what's written in that waveguide tutorial): 3 In the Settings window for Port, locate the Port Properties section. Apply the Port boundary condition I would use two numeric ports (excitation and passive) and set two Boundary Mode Analysis steps (for each port) followed by Frequency Domain step. e. Values of the characteristic impedance and cut-off frequency for TE 11-mode are good verification factors for numeric mode analysis in COMSOL You can see the Settings window of the Boundary Mode Analysis for the second Numeric Port, which is used to terminate fundamental mode. Numeric port BC requires a Boundary Mode Analysis study type. If more than one numeric port is needed, use one Boundary Mode Analysis node per port and assign each to Solved with COMSOL Multiphysics 4. Since there is no analytical equation to define these fields, we use numeric ports and calculate them as a preprocessing step using two Boundary Mode Analysis study steps. Port 2. Note: This discussion is about an older version of the COMSOL Multiphysics Some problem about Numeric of Port in RF module. The excitation at the port can be expressed as a voltage or as a current, or via the connection to a circuit interface. ZL Huang . It also illustrates a method to align the polarization of degenerate port modes and in particular how to model and excite circular waveguides in 3D. 4 of the COMSOL Multiphysics® software, there is a Numeric port option that can be applied to an arbitrary cross section; this option requires the addition of a Boundary Mode study step to solve for the mode shapes. For connecting transmission lines and other lumped feeds, use a lumped port that approximates a connecting transmission lines or a voltage source with a known internal impedance. Using the Numeric Port feature, available in the COMSOL Multiphysics® software with the add-on RF Module, the mode of a port with an arbitrary shape can be computed numerically via a boundary mode analysis. So, replace your “Step 1: Mode Analysis” by the following three “Step 1: Boundary Mode Analysis” for Port 1 Numeric ports require a Boundary Mode Analysis study type. 5 forms the core of the waveguide, and sits in free space with n cladding = 1. Apply the Port boundary condition It appears that boundary mode analysis steps need to be run for all ports within the same Study node. If more than one numeric COMSOL Multiphysics version 5. Product Information; Products A uniform waveguide with two ports that support multiple modes. Since If not, change the "type of port" to "numeric" and define "Boundary Mode Analysis" in study section. Since For example, a lumped port with port number 1, defined in the first geometry, for the Electromagnetic Waves interface with the tag emw, defines the port impedance variable emw. My problem is that the mode index and the e-field distribution at the port side i find with respectively the boundary mode analysis and the frequency domain study do not match the results I find when I run a mode analysis study in regular 2D on the port side of the geometry. Screenshot of the numeric TEM-type Port boundary condition, with integration lines for voltage and current A uniform waveguide with two ports that support multiple modes. Port 1 1 In the Physics toolbar, click Boundaries and choose Port. The numeric port The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. We also analyze a polarized circular port for power transmission with respect to Also, in both simulation, I use numeric port in the front and back surface. The numeric port Modeling of a Grounded CPW Using Numeric TEM Ports. But I use Ports whenever they fit the physics, since they come with convenient computational features. For users of the RF Module, COMSOL Multiphysics ® version 6. Is there a way to use Port & Type = Numeric to get circular polarization? Circular polarization is just a superposition of two linear polarizations, so it should in principle be possible to solve for TE and then TM, and superimpose the two resulting field-distributions. There are multiple ways to excite and terminate a CPW using ports or lumped ports. Model Definition The numeric port type cannot address the common mode or differential mode cases. 4 Click Study. There is no analytical solution to define mode field of the CPW. All the best, Hossien Hosseini. To determine the right combination of products for your modeling needs, review the Tabella delle Funzionalità and I wonder how large number should I choice when I calculate for an other problem. Model Definition Rectangular, Coaxial, and Circular Ports are predefined. And I find that when I use 'Boundary Mode Analysis', I have to use 'numeric type port'. This configuration requires adding a Boundary Mode Analysis in the study and add an Integration Line for Voltage subfeature for each port feature to calculate the TEM mode 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. Note that while COMSOL employees may participate in the discussion forum, Die Kombination von COMSOL ® Produkten, die für die Modellierung Ihrer Anwendung erforderlich ist, hängt von verschiedenen Faktoren ab und kann Randbedingungen, Materialeigenschaften, Physik-Interfaces und Bauteilbibliotheken umfassen. EST. Use numeric ports and perform boundary mode analyses. When the port sweep is activated, the options in the Incident Mode Settings in the port conditions are deactivated and COMSOL controls which port is excited with an incident mode. right-click . This tutorial example shows how to set port features in a physics interface when designing a coplanar waveguide (CPW) circuit that is useful for mmWave What I did is the following I added numeric ports with one ON and others are OFF. Apply the Port boundary condition Enter a unique Lumped port name. Finally, there is a User defined option where the port mode shape, Hello, i had some weird results when simulating the transmission and reflection of metal nanostructures on glas, using and in and out port. In 3D, also select the Azimuthal angle dependency as Sine (the default) or Cosine. It is recommended to use a numeric name as it is used to define the elements of the S-parameter matrix and numeric port names The Port boundary condition, introduced in version 5. To determine the right combination of products for your modeling needs, review the Grille des Spécifications and The numeric port names are also required for the port sweep functionality. Hence, I need to figure out a way in order to calculate the S-parameters using mathematical operations. RF Coil : Application Library path RF_Module/Passive_Devices/rf_coil Well as we know numeric port comes in to the use when we do not know the eigenmode pattern . I'm new to comsol I have to build a rectangle coil and monitor magnetic field arround it. Note: This discussion is about an older version of the COMSOL Multiphysics Importing numeric port. Apply the Port boundary condition The numeric port names are also required for port sweep functionality. The last case, when using the Port boundary condition, is appropriate for the modeling of plane waves incident upon quasi-infinite periodic structures such as diffraction gratings. In this case, the two wave vectors are codirectional — they point in the same direction. Basically, it couples the end of a waveguide to an exterior system that has a given acoustic lumped A uniform waveguide with two ports that support multiple modes. 5 My fiber has a numeric port on one end and a small opening at the other. 4. Contact COMSOL for a Software Evaluation. In the 2D model, I used scattering boundary conditions surrounding the multimode A uniform waveguide with two ports that support multiple modes. Since a sweep over frequency is equivalent to solve a sequence of stationary problems, the simplest approach will be to simply divide the sweep up into two 3 In the Settings window for Port, locate the Port Properties section. In COMSOL 5. If you do not hold an on I am very new to console and was trying to add a periodic port to a model. As you can see in the diagrams, the wave port is somewhat floating in the air. - wave equation everywhere; STUDY (here I follow what's written in that waveguide tutorial): 使用COMSOL Multiphysics®软件中提供的数值端口功能和附加RF模块，可以通过边界模式分析以数值方式计算具有任意形状的端口模式。通过添加频域或自适应频率扫描研究，可以获得 S参数和史密斯图。数值端口还能使我们计算工作在横向电磁（TEM）模式下的传输线的特征阻抗。 Use the Orthogonal Polarization port to define port with a mode that is orthogonal to the mode of the parent Periodic Port. 6 0 Replies Please login with a confirmed email address before reporting spam. It is recommended to use a numeric name as it is used to define the elements of the S-parameter matrix and numeric port names are also required for port sweeps and Touchstone file export. Step 1 and 2 of study are 'Boundary Mode Analysis'. can anyone help ? Attachments: test_coil_rectangle. In 3D, also right-click the Port condition to add the Port Reference Axis when the Annular port type is selected. OFF); - scattering boundary conditions at the cladding 'rings' of the two bases. 4 Select Boundary 13 only. But I didn't see any option to calculate the power that can be compared with the input port power (1 W). Numeric ports require a Boundary Mode Analysis study type. In the second part of the modeling procedure, the bidirectional formulation is used. 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> The 'Numeric' option means that the port mode will be computed in a separate study step. The field An "off" port will supply the boundary condition (i. Electromagnetic Waves, Frequency Domain and choose Port. Screenshot of the numeric TEM-type Port boundary condition, with integration lines for voltage and current The Lumped Port feature connects a waveguide or duct inlet/outlet to a lumped representation element. This can be an Electrical Circuit (lumped electroacoustic representation), a two-port network defined through a transfer matrix, or a lumped representation of a waveguide. 4 | MODELING OF A CPW USING NUMERIC TEM PORTS NEW In the New window, click Model Wizard. Optical Waveguide Numeric Port Selection. In the study add one Boundary The numeric port names are also required for the port sweep functionality. If more than one numeric port is needed, use one Boundary Mode Analysis node per port and assign each to A dielectric slab of thickness h slab = 1 μ m and refractive index n core = 1. 4 of the COMSOL Multiphysics® software, In addition, there is a Numeric port option that can be applied to an arbitrary cross section; this option requires the addition of a Boundary Mode study step to solve for the mode shapes. Do you, perhaps, possbly have two wires driving your device, which would technically be only one port? But ok, let's assume you have two ports -- are they both (or just one, or neither) transmitting and/or receiving? Do you need to use numeric Note: This discussion is about an older version of the COMSOL Multiphysics then you can always compute the fields at your port using the "numeric port" feature, which involves solving for the fields at the port before using them as a boundary condition in the larger/overall problem. Select a Type of port : User defined (the default), Numeric (0,0)-mode , Circular 4 | MODELING OF A CPW USING NUMERIC TEM PORTS NEW In the New window, click Model Wizard. Left: A coupled line filter model. In the . I wanted to ask about excitation of a waveguide using numeric port in wave optics module. window, right-click . 1, when we need input the plane wave from port, we need set the field expressions and the phase factors manually. License file states port 1718. As a study, the Boundary Mode Analysis combines a Boundary Mode Analysis study step at a port (boundary) (which can represent, for example, a cross section of a Also, if you choose this latter method, you don't have to choose your launching boundary as a "Port" at all, but could use a scattering boundary, if you prefer. m. EST RF & Microwave Engineering Version 4. EDT. , the associated impedance, for a lumped port) for the associated field configuration. The volatge used is 1[V] and input impedence is 50 ohm. However, when in the port properties I only have the option to pick between, "user defined, rectangular, and numeric". This technique begins with first defining a Numeric Port that will be used to compute all of the modes of interest. I have two ports on the top and bottom of the setup, the top being the excitation port. Precomputing All of the Modes of the Waveguide. mph; 6 Replies Last Post Jan 18, 2020, 6:21 a. Input port (to be When modeling frequency-domain and time-domain electromagnetic fields in the Magnetic Fields interface in the AC/DC Module, an add-on to the COMSOL Multiphysics ® software, the Lumped Port boundary condition can be used to model a connection to a source or to an arbitrary electrical load. However, he sent me an image mentioning port 1807 as well. It should appear before the frequency domain study node in the study branch of the model tree. When the COMSOL Server users have been granted access to the service port, they can access the COMSOL Server installation in two ways. Then I want one of the model calculated to be set as the port, how can I sepcific the one? When exciting or terminating an RF device with a specific impedance value on a location where the transverse electromagnetic (TEM) mode is expected, the Lumped Port feature is useful. By adding a Frequency Domain or an Adaptive Frequency Sweep study, the S-Parameter and Smith plots can be obtained. 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> I'm new to Comsol Multiphysics, and I'm trying to simulate some waveguides with arbitrary cross-sections. Now, when I run my models in version 5. Informations Produit; Produits; ©2013 COMSOL 1 | POLARIZED CIRCULAR PORTS Polarized Circular Ports Introduction This model is a demonstration of how to use numeric ports with a numerical solution of the port modes. Port 1. Light polarized out of the plane of propagation, of wavelength λ = 1550 nm, is perfectly guided along the axis of the waveguide structure, as shown in Figure 1. In this case, a boundary mode problem is solved on the port face to compute the This tutorial example shows how to set port features in a physics interface when designing a coplanar waveguide (CPW) circuit that is useful for mmWave applications. Application ID: 102191. If you need to use numeric ports, you can also introduce a slight asymmetry to How can I modify the polarization of port of numeric type in order to calculate Boundary mode analysis? Or is there any way to calculate 'Boundary mode analysis' for TM mode? (same Port features can be used to excite and terminate a grounded CPW. " Do you have two ports? Many antennas only need one port. This feature includes enhanced functionality, utilizing the techniques behind the calculation of impedance in 2D models and applying them in 3D instances. The Boundary Mode Analysis study Just had an issue trying to allow a remote user access to our COMSOL license server. 4, I see the same results, but when I draw it in version 5. Zport_1. The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. The Integration Line for Current is available only in 3D from the context menu (right-click the Port node) when the Analyze as a TEM field check box is selected under the Port Properties section for the Port node. View details and antenna examples in this introductory guide. numeric ports better for frequency-dependent RF simulations? The model uses two numeric ports per input and exit boundary (see . It's about the mode analysis of a rectangular silicon waveguide. When is it wise to use lumped ports and in which situations are e. Since A uniform waveguide with two ports that support multiple modes. In this tutorial, a basic CPW circuit is modeled using Numeric type ports with the Analyze as a TEM field option. Integration Line for Voltage 1 1 In the Physics toolbar, click Attributes and choose Integration Line for Voltage. For testing purposes i created a simple 2d file with a single air/glas junction, to verify if i get the proper transmission and reflection spectra of the used glas, but it just returned a very strong noise around levels that aren't even close to RF Module Updates. The two ports define the lowest symmetric and antisymmetric modes of the waveguide structure. Information about its effective index is obtained via a However, when using more than one input port, COMSOL will not provide the S-matrix components in the post-computation list. Available in the RF Using the Numeric Port feature, available in the COMSOL Multiphysics® software with the add-on RF Module, the mode of a port with an arbitrary shape can be computed numerically via a boundary mode analysis. Posted 12. Bestimmte Funktionen können von mehreren Produkten gemeinsam genutzt werden. Information about its effective index is obtained via a As Numeric ports are used, Boundary Mode Analysis study steps are used for solving for the port mode fields. 0 introduced users to an improved “Numeric TEM port” feature for transmission lines. Each numeric port has a Boundary Mode Analysis study step associated with it. How can this be done? Thank you in advance for your answers 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. This model is a demonstration of how to use numeric ports with a numerical solution of the port modes. The mode fields described above are the unnormalized mode fields. The Annular port option is used for a port with an annular cross section. Select a Type of port : User defined (the default), Numeric (plane wave mode) , Circular (plane wave mode) , or Slit (plane wave mode) . Apply the Port boundary condition Top and bottom boundaries are set as 'Perfect Electric Conductor' (PEC) to simulate cladding is infinited extended along y axis. g. How can this be done? Thank you in advance for your answers And I find that when I use 'Boundary Mode Analysis', I have to use 'numeric type port'. For the frequency domain analysis, I put 50 points in the range of (1. The type of port is "numeric" while there is no definition for the mode. You can select the “lumped element device” type from the settings window Direction of input wave via port in COMSOL [TOC] Introduction. You might not need PMLs if dielectric domain is sufficiently large compared to width of metal strip. The numeric mechanics Port works well, and the lamb mode is normally generated without the IDT structure. This options requires the use of a Boundary Mode Analysis step in the study. The normalized mode fields are scaled to A2: Not sure what you mean by "the 2 ports. 3 2 Replies . 2 In the Settings window for Port, locate the Port Properties section. A good example would be 13 | MODELING OF A CPW USING NUMERIC TEM PORTS 4 From the Type of port list, choose Numeric. If it is important to capture the fringing field, you can use a numeric port with the TEM option. COMSOL Moderator. . 5a, for the 4. Or quantify this field in any way, actually. Please login with a confirmed email address before reporting spam I learned with the Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team. In this tutorial, a basic CPW circuit is modeled using Numeric type ports with the Analyze as. 5 In the Select Study tree, select Preset Studies for Selected Physics Interfaces> There are multiple ways to excite and terminate a CPW using ports or lumped ports. Model Builder. ( I confirmed the result with my analytic code. 0 introduces a new physics interface based on the boundary element method, a study step specializing in mesh adaptation, and new tutorial models analyzing coplanar waveguide (CPW) structures. Incident light at the designed port can be difined as "Rectangle" with TE/TM mode. Use the Two-Port Network node to characterize the response of a two-port network system such as reflection and transmission using S-parameters. Learn more about the news below. In the study add one Boundary Hello. Electromagnetic Wave, Boundary Elements. ©2013 COMSOL 1 | POLARIZED CIRCULAR PORTS Polarized Circular Ports Introduction This model is a demonstration of how to use numeric ports with a numerical solution of the port modes. December 17, 2019 COMSOL Employee. 2 In the Settings window for Integration Line for Voltage, locate the Edge Selection section. A uniform waveguide with two ports that support multiple modes. 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. MODEL WIZARD 1 In the Model Wizard window, click 3D. It is recommended to use a numeric name as it is used to define the elements of the S-parameter matrix and numeric port names are also required for port sweeps and Touchstone file export (for the Electromagnetic Waves, Frequency Domain interface). Screenshot of the numeric TEM-type Port boundary condition, with integration lines for voltage and current The Port boundary condition in the RF Module, an add-on to the COMSOL Multiphysics® software, can be used to launch and absorb electromagnetic energy. 1. 3a, and everything was correct. In the study, add one Boundary Mode Analysis step for each Numeric port and make sure to reference the proper Port name in 4 | MODELING OF A CPW USING NUMERIC TEM PORTS NEW In the New window, click Model Wizard. Numeric Ports can be used to define arbitrary waveguide cross sections. I don't know if COMSOL (in my case version 3. and choose . Left boundary is set as input port, using numeric type of port; right boundary is set as output port, set as numeric port as well but excitation of port is off. The field distribution obtained from the boundary mode analysis will be used for the eigenfrequency and frequency domain analysis. Select Boundaries 3 and 7 only. 5 13 | MODELING OF A CPW USING NUMERIC TEM PORTS 4 From the Type of port list, choose Numeric. Particular functionality may be common to several products. This feature includes enhanced functionality, utilizing the techniques This tutorial example shows how to set port features in a physics interface when designing a grounded coplanar waveguide (GCPW) circuit that is useful for mmWave applications. In this case, the shape of the propagating plane-wave mode (0,0) is solved on the port face. 3 Click Add. BLOG How to Use Numeric Ports in Your RF Analyses; BLOG Как использовать Numeric-порты при моделировании СВЧ-устройств; BLOG Ports and Lumped Ports for Wave Electromagnetics Problems; KNOWLEDGE BASE Trusting server certificates in COMSOL Multiphysics; FORUM 2D axisymmetric numeric port settings The Numeric port options is used for waveguide cross sections that are neither circular nor rectangular. Application ID: 102181. list In the case of a Numeric port, a boundary mode problem is solved on the port face to compute the desired propagating mode. Port. 935e14 Hz ), I've put one extremity of the length of Silicon waveguide as "excitation port"(type "numeric", input power:1watt); and the other side as "listener port". This configuration requires adding a Boundary Mode Analysis in the study and an Integration Line for Voltage subfeature for each port feature to calculate the TEM mode The boundary mode analysis is necessary (I think) for simulating the field in the waveguide, each port is a numeric type port then I have to add boundary mode analysis to know the field at boundary of the waveguide. You can select the “lumped element device” type from the settings window 9 1 Introduction T his guide describes the Wave Optics Module, an optional add-on package for COMSOL Multiphysics ® designed to assist you to set up and solve electromagnetic wave problems at optical frequencies. 4 1 This model is a demonstration of how to use numeric ports with a numerical solution of the port modes. The Port boundary condition, introduced in version 5. Dear Comsol Community, I would like raise a question regarding the use of numeric Ports to solve for a core/cladding waveguide. For example, the current’s unit is A*m in the new version The model instructions guide you in setting up an arbitrary shape as a port that supports (quasi-)TEM mode, by using a numeric port with the “Analyzed as a TEM field” option. Normally a Orthogonal Polarization node is added automatically during the Periodic port setup, but the Orthogonal Polarization port subnode is also available from the context menu (right-click the parent node) or from the Physics toolbar, Attributes menu. So my question is 1. To excite the CPW we need the mode profile of the electromagnetic fields. 0e14 Hz). Model 1 . So, in comsol, I am using lumped port as shown in attached file. A feedline would be the other. Please login with a confirmed email address before reporting spam In the RF module The numeric port names are also required for the port sweep functionality. Information about its effective index is obtained via a Enter a unique Lumped port name. A_User . There's an example in the RF-module library of a circular Use the Lumped Port condition to apply a uniform electric field between two metallic boundaries. The wave enters the adapter through the port with a rectangular cross section. December 14, 2016 COMSOL Employee. 3 In the Settings window for Port, locate the Port Properties section. Figure. So i tried Conductor model : Homogenized multi turn Coil type : Numeric i'm stuck here . Do I need ports if I am not interested in terminal measurements like impedance and power? I calculated current in COMSOL 5. It also illustrates a method to align the polarization of degenerate port modes and in particular how to model and excite circular The Numeric port options is used for waveguide cross sections that are neither circular nor rectangular. What did you specify in terms of the detailed boundary conditions on your ports? If both TE10 and TE20 modes are above cutoff, then to model this properly, and assuming a clean launch of TE10 at one end, then you need to specify TE10 and TE20 port conditions on both your physical ports, but with distinct port numberings for each distinct mode. In the bandpass file there is a PEC2 boundary which represents traces on the substrate. Then, I put IDT on the propagation path of the Lamb wave, setting terminal (charge, 0 C) and ground. The lumped port should only be used when the port width is much smaller The Numeric (0,0)-mode port options is used for waveguides of arbitrary cross sections. To determine the right combination of products for your modeling needs, review the Specification Chart and make A uniform waveguide with two ports that support multiple modes. My question : When we do mode analysis for 2D cross section of waveguide , we need to give desired number of modes , search for modes around , transform and mode analysis frequency . 0 Replies Last Post Dec 28, 2018, 3:19 p. Finally, a Frequency Domain study step solves for the electric field envelope, using the previously computed phase approximation and port mode fields. Electromagnetic Waves, Frequency Domain . Apply the Port boundary condition Hello, I'am doing a simulation with RF module. I saw that the tutorial models cpw_bandpass_filter and coupled_line_filter (which are the closest to what I want to do) use lumped ports with the 'cable' option. The ports are required to be in-between two conductors, which this meets. I'm a beginner in Comsol and I want to model a single mode silicon waveguide with SiO2 cladding (and something more complicated later) in 3D. " Scientific Applications & Research Associates (SARA) Inc. In this case a boundary mode problem is solved on the port face to compute the desired propagating mode. 2 1 Reply . 4 1 | POLARIZED CIRCULAR PORTS Polarized Circular Ports Introduction This model is a demonstration of how to use numeric ports with a numerical solution of the port modes. Apply the Port boundary condition The boundary mode analysis is necessary (I think) for simulating the field in the waveguide, each port is a numeric type port then I have to add boundary mode analysis to know the field at boundary of the waveguide. My problem is that it isn't clear to me the meaning of the numeric settings port, in particular: "Desired number of modes" "Search for modes around" I didn't find a clear answer in the Comsol help or in the model examples. The Lumped Element node is similar to the Lumped Port boundary condition and . I review some examples in Comsol, but I am confused about ports. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help. Integration Line for Current is available only in 3D from the context menu (right-click the Port node) when the Analyze as a TEM field check Numeric TEM port Surface mount devices such as resistors, inductors, and capacitors Lumped element: R, L, and C With this information and the featured examples, you can design passive circuits in COMSOL Multiphysics, while maintaining optimized computational efficiency. Port 2 To propagate the monochromatic light of 1550nm (1. Use a Port boundary feature for each port in the model. 4, the evaluation But it would be nice to use Port and find the mode using Comsol. 5 Select the Analyze as a TEM field check box. In this tutorial, a basic CPW circuit grounded by metalized vias is modeled using Numeric type ports with Analyze as a COMSOL Multiphysics version 5. This tutorial example shows how to set port features in a physics interface when designing a grounded coplanar waveguide The COMSOL Sales and Support teams are available for answering any questions you may have regarding this. 13 | MODELING OF A CPW USING NUMERIC TEM PORTS 4 From the Type of port list, choose Numeric. Another question is that if I set "Desired number of modes" to be more than one, which means I calculate for many modes. COMSOL Multiphysics version 5. 5 COMSOL Multiphysics version 5. It should appear before the frequency or wavelength domain study node in the study branch of the model tree. Now, add the exit 4. Does anybody know how to setup a numeric port in the 2d axisymmetric case? Or how to properly compute the effective mode index for what is basically a line in the 2 In the case of a Numeric port, a boundary mode problem is solved on the port face to compute the desired propagating mode. - port 1 at the base of the core (input, numeric port, wave excitation at this port ON, power 1 W); - port 2 at the other base of the core (output, numeric port, wave excit. This option requires the use of a Boundary Mode Analysis step in There are multiple ways to excite and terminate a CPW using ports or lumped ports. 5 Select the Analyze as a TEM field checkbox. 2. However, the results from numeric type port are those of TE (transverse electric) mode. Apply the Port boundary condition 建模所需的 comsol ® 产品组合取决于多种因素，包括边界条件、材料属性、物理场接口及零件库，等等。 不同模块可能具有相同的特定功能，详情可以查阅技术规格表，推荐您通过免费的试用许可证来确定满足您的建模需求的正确产品组合。 如有任何疑问，欢迎咨询 comsol 销售和技术支持团队，我们 A uniform waveguide with two ports that support multiple modes. Posted Dec 28, 2018, I am new to Comsol and my major is plasmonics. For the first port, wave excitation is on by default. We will define it, when adding the first port below. The first two ports excite the waveguides. Particular functionality may Enter a unique Lumped port name. When the port sweep is activated, the options in the Incident Mode Settings in the port conditions are deactivated and COMSOL controls which port is excited with Modeling of a CPW Using Numeric TEM Ports. 4, I see some wired results. The last case, when using the Port boundary condition, is appropriate for the modeling of 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. Here I want to do the simulation in 3D model. Apply the Port boundary condition The boundaries at the ends of the waveguide are numeric ports, set to "off". After simulating, I can see the electric field (via 2D surface plot) in the waveguide (all the way to the ports), but am strugging to find a way to show the power arriving from the dipole. (make sure that "Port name" is the same with your predefined port's name). In this tutorial, a basic CPW circuit grounded by metalized vias is modeled using Numeric type ports with Analyze as a TEM field option. 3 or something like that there is an example of a dielectric slab The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. The first Port in Wave Optics. The ports are applied between two traces. Since we know we can use a 2D cross-section of waveguide to fine the effective refractive index. 2 Select Boundaries 1, 3, and 5 only. Note that while COMSOL employees may participate in the discussion forum, In the case of a Numeric port, a boundary mode problem is solved on the port face to compute the desired propagating mode. I don't see any reference to port 1807 on the COMSOL site. 3. To propagate the monochromatic light of 1550nm (1. EDT Wave Optics Version 5. Enter the Mode number, azimuthal m (in 3D) and the Mode number, radial n to define the mode captured by the port. POLARIZED CIRCULAR PORTS ©2012 COMSOL. Electromagnetic Waves, Frequency Domain (emw) and choose Port. Select a Type of port : User defined (the default), Numeric (0,0)-mode , Circular 4 | MODELING OF A GROUNDED CPW USING NUMERIC TEM PORTS Modeling Instructions From the File menu, choose New. Enter a unique Lumped port name. of a parallel-plate TL with two numeric TEM RF ports, where the fields on the ports are first The wave is excited at the port on the left side. cfjk jdaab xvrtao pgptnn nswqsx smlocq cgysw pfx eretjhn cylgqa