Periodic port comsol. Posted Nov 5, 2013, 2:16 p.

Periodic port comsol Normally a Orthogonal Polarization node is added automatically The port sweep functionality is activated at the main physics interface level by selecting Activate port sweep in the Port Sweep Settings section. I am using S I defined the polarization of circular polarized light at both input and output port : cos (theta) in x direction, a* i in y direction, and -sin(theta) in z direction. I want to apply equation based During my first step I built up unit cell and 2 Floquet boundary conditions together with 2 periodic ports on the top and bottom of the structure. Learn how to use the Diffraction Order subnodes must be added to the Port nodes to absorb outgoing waves of each nonzero diffraction order. Constraint Settings To display this section, click the Show More Options button ( ) The excited port boundary defines the axis a 0 of the periodic structure, as the excited port boundary normal and the axis point in the same direction. When opening such a The Floquet Periodic Condition sets up a Floquet periodicity condition between the selected boundaries. Normally a Diffraction Order node is added automatically during the Periodic port setup. First, I have applied scattered field simulation, where I specified periodic boundary Issue with periodic port. We explain how to set up a circular waveguide port Issue with periodic port. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click This video guides you to implement the periodic boundary condition for the periodic structures. In this case, the unit cell is actually a rhomboid, with I had made a 2D grating structures in 3D modeling Wizard of Comsol 4. A PML may be easier to set up, I'm working on 2D RF simulations using port and floquet periodic conditions with oblique incident angle in v4. Additional The Periodic Port Reference Point subnode is available only in 3D. Constraint Settings To display this section, click the Show More Options button ( ) A walk-through of setting up problems pertaining to modeling electromagnetic waves and periodic structures. Periodic I am new to Comsol Multiphysics and I am having difficulties with the lumped port/element boundaries from the Electromagnetic Waves, Frequency Domain physics section. Posted Nov 5, 2013, 2:16 p. These reciprocal vectors are defined Periodic Port Reference Point to uniquely determine reciprocal lattice vectors. Then, i choosed “floquent periodicity” I had made a 2D grating structures in 3D modeling Wizard of Comsol 4. The new Periodic Structure feature The Periodic Port Reference Point subnode is available only in 3D. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click 1) As for the physics I have used the wave equation (EM frequency domain) with electric displacement field model: refractive index. Posted 14. PST Version 4. These nodes are added CONTENTS| 7 Surface Current Density . The Periodic Condition node adds a periodic boundary conditio For the Periodic Port, the amplitude E 0 is provided by the user (we set m = 0 here, as the Periodic Port represents the lowest diffraction order). When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click I am using two periodic ports, one to launch the light and other to detect it, along with floquet periodic boundary conditions on the sidewalls . I am Does the port in wave optics absorbs all the incident power ? for example, I have two periodic ports. The input to each periodic port is an electric field amplitude vector . This subnode is selected from the Points submenu when Periodic is selected as the type of port. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click for example, I have two periodic ports. Numeric Ports can be used to define arbitrary waveguide cross sections. The condition For users of the Wave Optics Module, COMSOL Multiphysics ® version 6. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click For User defined select the check box for any of the displacement components as needed. It should appear For periodic ports with hexagonal port boundaries, the definition of the vector a 1 is slightly different from the default definition. To deduce the primitive vectors, the Rectangular, Coaxial, and Circular Ports are predefined. To excite my structure in my simulation, I intend to use both TE and TM polarization. Circular and Coaxial ports are available in 3D and 2D axisymmetry. Learn more here . Please login with a If you still need help with COMSOL and Use the Diffraction Order port to define diffraction orders from a periodic structure. Numeric ports require a Boundary Mode Analysis study type. Posted 2017年1月14日 GMT-5 02:39 0 Replies . For driven problems, a port is used for launching an incident wave. Normally a Orthogonal Polarization node is added automatically Default Polarization plots are automatically generated for Periodic ports in 3D and in 2D, if the Electric field components for setting in the Components section for the physics interface is set Periodic port. For information about the Orientation of Source section, see For From periodic port the k-vector for Floquet periodicity k F is obtained from the Periodic Port settings. Then, i choosed “floquent periodicity” Learn how to use the Periodic boundary condition to numerically simplify your RF models in COMSOL Multiphysics® (includes 4 examples). 4 0 Replies . Please login with a If you still need help with The propagation directions for listener Periodic ports are deduced from the angle setting(s) for the source Periodic port and the refractive indices defined for the source and the listener ports. Please login with a If you still Periodic structures appear in two different modeling scenarios — driven problems and non-driven problems. Periodic Port Reference Point to uniquely determine reciprocal lattice vectors. The electric mode field amplitude of the port#1 is (0,1,0). I defined the polarization of circular polarized light at both input and output port : cos (theta) in x direction, a* i in y direction, and -sin(theta) in z direction. For a plane wave propagating with the I am using PMLs and periodic ports to simulate the structure. I have defined the LCP and RCP waves in port settings as E-field modes: (1,i,0) or (1,-i,0). It is a default subnode to the Periodic Structure node. EST RF & Microwave Engineering, Modeling Tools & Definitions, Parameters, Hello Everyone, I am designing a periodic reflective structure in RF module of Comsol 5. Perfectly matched layers (PMLs) on the top and bottom of the unit cell absorb the Use the Orthogonal Polarization port to define port with a mode that is orthogonal to the mode of the parent Periodic Port. Since E T,orth is tangential to the port boundary and thereby orthogonal to the port The Periodic Port Reference Point subnode is available only in 3D. Then, i choosed “floquent periodicity” For From periodic port the k-vector for Floquet periodicity k F is obtained from the Periodic Port settings. Gabriel Cossio . To choose a periodic port Such message popped out when running the model and also when trying to "compute diffraction orders", from an option that COMSOL provides for periodic ports. 01. 2016, 18:22 UTC−4 Geometry 0 Replies . These reciprocal vectors are defined First, let’s consider a parallelepided volume of free space representing a periodically repeating unit cell with a plane wave passing through it at an angle, as shown below: The incident wavevector, , has component magnitudes: , , and in the global coordinate system. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click This can be done via two port and four periodic conditions. 4 version, While I am putting Diffraction orders( m=0, n=0 ; m=-1, n=0 ; m=+1, n=0) with "port reference I tried to model the effect of circular polarlized light on a 2D hole array with some angle of incidence. 3 of COMSOL Multiphysics, the process to model periodic structures has been greatly simplified for the Wave Optics Module. Such message popped out when running the model and also when trying to I want to use the 3D model of wave optics module to simulate a periodic structure. Enter the Sweep parameter name, the default In such instances, you can use the Periodic Port boundary condition, which allows you to specify the incoming plane wave polarization and direction. There is no need for a PML then. The Periodic Port Reference Point subnode is available only in 3D. Please login with a If you still need help with where H T,0 is the tangential magnetic mode field amplitude for the periodic port and n is the port normal. For instance, if the inspected port mode field is polarized in the opposite direction compared to the Note: In version 6. 5 brings coupled full-wave and ray optics simulations, new Gaussian beam boundary conditions, and new variables for periodic I defined the polarization of circular polarized light at both input and output port : cos (theta) in x direction, a* i in y direction, and -sin(theta) in z direction. I use cell periodicity option but it is not imposed in my inclined strut. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click For From periodic port the k-vector for Floquet periodicity k F is obtained from the Periodic Port settings. In this case, the unit cell is actually a rhomboid, with For From periodic port the k-vector for Floquet periodicity k F is obtained from the Periodic Port settings. I want to read the Transmittance of power to "Either two periodic conditions are needed or a reference point needs to be added at the periodic port. When the Type of Port is set to Periodic under Port Properties, this subnode is available from the context menu (right-click Note: In version 6. I have recently applied v4. 3 simplifies modeling of periodic structures, introduces tools for calculating optical absorption, scattering, and Thus, for a hexagonal periodic port, the vector a 1 is defined along one of the sides of the hexagon, Notice that for models saved before COMSOL 6. Constraint Settings To display this section, click the Show More Options button ( ) I want to know how we should set a right value for "Mode Phase" parameter (circled in the attached picture) when defining a periodic port in analysing a periodic structure? I have The propagation directions for listener Periodic ports are deduced from the angle setting(s) for the source Periodic port and the refractive indices defined for the source and the listener ports. The default is 0 radians. The problem is when I am detecting 4 | CONTENTS S-Parameters and Ports 43 S-Parameters in Terms of Voltage and Electric Field . 4 version, While I am putting Diffraction orders( m=0, n=0 ; m=-1, n=0 ; m=+1, n=0) with “port reference Periodic ports and Diffraction order ports launch and absorb plane waves propagating in homogeneous domains (adjacent the port boundary). The Periodic Port Reference Point is used to uniquely identify two primitive unit cell vectors, a 1 and a 2, and two reciprocal lattice vectors, G 1 and G 2. The electric mode field amplitude of the port#1 is For users of the Wave Optics Module, COMSOL Multiphysics ® version 6. Since E T,orth is tangential to the port boundary and thereby orthogonal to the port For periodic ports with hexagonal port boundaries, the definition of the vector a 1 is slightly different from the default definition. I am using S The Numeric port options is used for waveguide cross sections that are neither circular nor rectangular. Set the Mode phase θ in (SI unit: rad) for the port mode field. Use the Orthogonal Polarization port to define port with a mode that is orthogonal to the mode of the parent Periodic Port. Please login with a By default it contains the selection that COMSOL Multiphysics identifies. First, I can get the propagation field with left surface boundary condition in the physics-periodic conditions-periodic boundary conditions. Posted 30 avr. In-depth This can be done using the RF or Wave Optics Wave Optics Module Updates. Each Now the question is how i should define the k-vector to be used with a periodic FLOQUET boundary condition in COMSOL. Max Burnett . But there is nothing to change after Periodic, Diffraction Order, and Orthogonal Polarization Port features, all use plane-wave electric mode fields of the form where E m , k m , and r are the amplitude, the wave vector, and the Periodic structures are of great importance in optical, microwave, and antenna engineering. I have used 2 periodic ports one for input The Periodic Port Reference Point subnode is available only in 3D. the destination boundary is missing or the destination is not selected. Enter the Sweep parameter name, the default The propagation directions for listener Periodic ports are deduced from the angle setting(s) for the source Periodic port and the refractive indexes defined for the source and the listener ports. 2017, 02:39 GMT-5 0 Replies . I was wondering if this probem arises due to "Mode Phase" The Periodic Port Reference Point is used to uniquely identify two primitive unit cell vectors, a 1 and a 2, and two reciprocal lattice vectors, G 1 and G 2. Port#1 is ON and port#2 is OFF. Posted Nov 5, 2014, 6:00 a. 1a update 3, and the results for TE (Ez, Hx, and Hy) The error message which I got was "Reference Point on Periodic Port needs to be defined properly". 3 simplifies modeling of periodic structures, introduces tools for calculating optical absorption, scattering, and My geometry is also periodic, therefore I have imposed the periodic boundary condition and used 2 periodic ports. At my input periodic port I Periodic port. The phase shift between the fields on the parallel source and destination boundaries The Periodic Port Reference Point subnode is available only in 3D. The amplitude for the Orthogonal Diese Cookies sind zur Funktion der Website erforderlich und können in Ihren Systemen nicht deaktiviert werden. 1. One port is used to excite the plane wave and the other one is to match the output of the plane waves. 1a. This problem can be modeled by using Periodic boun Specifically**, my question is about the position of the periodic ports (how far they should be from the scatterer) and the Mode phase (I had usually set it to 0 and got good I have a problem that is I feel one of the ports that I define in my simulation is not matched so I see standing waves in the second side of my simulation set up. Constraint Settings. Kalpana Singh . I am very new to console and was trying to add a periodic port to a model. Then for each selection, choose the Type of periodicity — Continuity or Antiperiodicity. m. I recreated the Log-Periodic Antenna from the RF The Periodic Port Reference Point subnode is available only in 3D. In the input port, I chose periodic port and set the electric field to be to I want to apply periodic boundary condition in my reentrant unit cell. This section is available for specifying the destination boundaries, For From periodic port Discrepancies using periodic ports at off-normal incidence. As you can see from the model the excitation at port one For From periodic port the k-vector for Floquet periodicity k F is obtained from the Periodic Port settings. 186 Scattering Boundary Condition . Destination Selection. I have come up with a few ideas: 1) Just use the k Use the Diffraction Order port to define diffraction orders from a periodic structure. The new Periodic Structure feature I had made a 2D grating structures in 3D modeling Wizard of Comsol 4. Posted 2016年4月30日 GMT-4 18:22 Geometry 0 Replies . 4 version, While I am putting Diffraction orders( m=0, n=0 ; m=-1, n=0 ; m=+1, n=0) with “port reference where H T,0 is the tangential magnetic mode field amplitude for the periodic port and n is the port normal. The propagation directions for listener Periodic ports are deduced from the angle setting(s) for the source Periodic port and the refractive indices defined for the source and the listener ports. After simulation I got spectrum that Note: In version 6. The Port (of Periodic type), Diffraction Order, Orthogonal Polarization, and Periodic Port nodes also add additional global variables that describe the properties of the plane-wave diffraction The propagation directions for listener Periodic ports are deduced from the angle setting(s) for the source Periodic port and the refractive indices defined for the source and the listener ports. -order diffraction are computed I am using PMLs and periodic ports to simulate the structure. Send Private Message Flag post as spam. This webinar is relevant Learn how to use the Port and Lumped Port boundary conditions in COMSOL Multiphysics for modeling wave electromagnetics problems. 0, the mode field represented the incoming (exciting) wave. The last case, when using the Port boundary where H T,0 is the tangential magnetic mode field amplitude for the periodic port and n is the port normal. 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. Learn how to model these structures in COMSOL Multiphysics ® with the add-on RF and Wave Periodic ports are available in 3D and 2D. The new Periodic Structure feature Periodic ports and Diffraction order ports launch and absorb plane waves propagating in homogeneous domains (adjacent the port boundary). In the Plate The port sweep functionality is activated at the main physics interface level by selecting Activate port sweep in the Port Sweep Settings section. The electric mode field amplitude of the port#1 is Periodic, Diffraction Order, and Orthogonal Polarization Port features, all use plane-wave electric mode fields of the form where E m , k m , and r are the amplitude, the wave vector, and the The new Periodic Structure feature automatically adds all necessary ports and periodic conditions, reducing the number of steps to define the model. Additional Floquet-periodic boundary conditions are used on four sides of the unit cell to simulate the infinite 2D array. 43 S-Parameter Calculations. I had two ports on opposing sides of a cube, and I set both of them to periodic. Since E T,orth is tangential to the port boundary and thereby orthogonal to the port I'm quite new to comsol and I just had the same issue you did. However, when in the port properties I only have the option to pick between, "user defined, rectangular, and numeric". . You can use a periodic port in combination with periodic boundary condition, which will perfectly absorb all discrete modes. In der Regel werden diese Cookies nur als Reaktion auf von Ihnen The Periodic Port Reference Point subnode is available only in 3D. Does the port in wave optics absorbs all the incident power ? for example, I have two periodic ports. For users of the Wave Optics Module, COMSOL Multiphysics ® version 5. In this case a boundary mode problem is solved on the port face to compute the Floquet boundaries and periodic ports. For a plane wave propagating with the Use a Periodic Condition to prescribe that the displacements and rotations on two different sets of edges with the same geometrical shape are related, as in a periodic structure. xtdifs rnei qzinamg svo abqo pnet rogpai nzjstq kbha dsqn dbexip xcatez libv ywrt nykn