In an ideal power divider the power given in port 1 is equally split between the two output ports for power division and vice versa for power combining as shown below. Does anyone have an idea about the wave port or lumped port in hfss,which should be. To open a help topic about a specific hfss dialog box, open the dialog box, and then press f1. A 3d multilayer cpw structure structure 2 the model is then simulated using hp hfss for frequencies from ku to ka bands. Always perform a solve ports only solution to ensure the waveport is correct. I have a cpw transmission line that i am tweaking the dimensions of to try and get 50 ohm characteristic impedance. Floquet port 12 introduction floquet ports in hfss the floquet port in hfss is used exclusively with planarperiodic structures.
A lumped port induces a voltage difference between two conductors. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. With incorrect inputs, the entire 3d field solution will be incorrect. Intuitive pcb design entry for hfss chips, packages, channels, modules, designer layouts simulated with hfss automated boundary and port setups finite dielectrics and ground supported wave and lumped gap port single ended and differential vertical and horizontal. By adding two lumped ports on either side of the center conductor, the cpw can also be excited. You can even use a linked hfss simulation as the source. Weassumeyouhavesome experienceofdesigningprojectsusinghfss. Roke presentation title 2 using hfss successfully at 77ghz data sheets give you the dielectric constant and the loss tangent. Select the menu item hfss excitations assign lumped port hfss excitations assign lumped port hfss excitations assign lumped port hfss. Assign lumped port edit select by name select source hfss excitations assign lumped port set the lumped port as shown in the picture. A lumped port excitation will be used for the cpw feed.
Read the section on impedance calculation in hfss help. Rf3p defines each lumped port with a series of integration paths from the port terminal to the ground reference or the negative terminal, in the case of a differential port. You will probably want to use the zpi form and an impedance line. The imaginary component of complex permittivity is df dissipation factor. Select the menu item hfss excitations assign lumped port. To obtain the field patterns, intrinsic impedance and wavelength for the first 4 modes. The only difficulty with this approach is that it will require you to manually set. Tools options hfss options general tab check use wizards for data input when creating new boundaries check duplicate boundariesmesh operations with geometry click ok. Materials used in pcb technology generally have dk from 2 to 10 dk is dimensionless. Mar 09, 2015 an example of a userdefined lumped port geometry. How assign lumped port in hfss for stripline sipi exchange. Basic electromagnetic field quantities and, for open boundary problems, radiated near and far fields.
Make sure the mode and impedance line make sense by examining the port field configuration for each mode. This can significantly simplify and speed up your simulation. The results should only be used as an estimate for the waveport size. Set up and run a sonnet em simulation project of a coplanar waveguide cpw transmission line including the port designations for differential signaling. Dk is a very important property for microwave pcb design. Chief examples are planar phased arrays and frequency selective surfaces when these may be idealized. It is convenient to match with the ground employing the tapered feed strip. Lumped port uses a uniform parallel field on patch as source to excite structure.
The device must be connected by a section of transmission line or waveguide supporting traveling waves. Post processing select renormalize all modes and leave the full port impedance as 50 ohms click finish repeat the steps above to make rectangle 1 wave port 2. Generalized sparameters and sparameters renormalized to specific port impedances. This paper proposes a new trapezoidal cpwfed uwb antenna that the bandwidth return loss. Filter design using ansoft hfss university of waterloo. Basic electromagnetic field quantities and, for open.
Cim design 32,221 views hfss design of rectangular patch. Cpw transmission lines often cause significant grief as they are mode rich. Modelling of 3d multilayer coplanar waveguide structure. You specify the name of the project when you save it using the filesave or filesave as. This is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in uwb. It shows the electric and magnetic vector fields at 10ghz as well as. A lumped port lumped port lumped port lumped port excitation will. Kyle davidson 9,630 views rodexcited waveguide slot antenna simulation microstrip patch antenna using hfss ansys duration. Creating the excitation right click rectangle 2 assign excitation wave port wave port. Chapter 2 application of em simulators for extraction of. This voltage is applied during the full simulation, eliminating the need for the preliminary ports only solve. Chapter 2 application of em simulators for extraction. To access online help from the hfss user interface, do one of the following.
Each integration path defines a circuit element with resistance given by n. Scribd is the worlds largest social reading and publishing site. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. Ports and lumped ports for wave electromagnetics problems. Lumped excitation of cpw fed slot bowtie antenna by hfss. The length of the line must be long enough such that only one propagation mode exists on the reference plane of the port. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a. As a start point, a preestablished project file of hfss will be given in order to be proved andor modified and completed in terms of reliability of the result.
The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. How do you design a port in hfss for cpw feed slot antennas. Hi, check the attached tutorial which explains on how to use lumped ports for different transmission lines. Hfss tutorial starting ansoft hfss click themicrosoft start button,select programs and select the ansofthfss9hfss9 or double click the hfss9 icon on the desktop creating projects. Pdf high frequency structure simulator hfss tutorial. Modes leave default settings and click next wave port. Characteristic port impedances and propagation constants. I konw for a microstrip line, i can draw the 2d port rectangle that touchs the signal with one edge and the opposite edge touch the reference ground plane. Ansys hfss tutorial simulate and analyze an example of trace and via. Ansys hfss simulates 3d fullwave electromagnetic fields. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a 2d xy plot.
Therefore, proper attention to port definitions can make the difference between a successful and unsuccessful hfss analysis. Keysight eesof eda microstrip and cpw power divider design. Hfss tutorial cpw menu computing button computing scribd. The antenna was etched on a singlelayer coppercladding substrate, of which the material was fr4 with relative permittivity of 4. Open a previously saved project using the fileopen command. In lumped port node, you didnt select any boundary. Feb, 2003 the port need to be large enough to reduce edgeeffect. In wave port, tem mode of crosssection of the structure is calculated first, then the tem mode is used to excite. Modelling of 3d multilayer coplanar waveguide structure with.
Another use of the lumped port condition is to model a small electrical element such as a resistor, capacitor, or inductor bonded onto a microwave circuit. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. General leave the port number 1 and click next wave port. Problem description getting started create the 3d model analysis setup plot sparameters vs. Lumped port selection this presentation is one in a series of port tutorials, intended to help users better understand the nuances of model excitation. How assign lumped port in hfss for stripline hi,everybodybecause the pcb line i will simulate located internally, so i can not use the wave port of hfss. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in uwb range i. It provides a minimum mesh density over all objects. The parameters of the antenna are simulated and optimized with hfss. How to set lumped port and wave port in hfss youtube. Simulation of cpw in hfss circuit design electrical.
For transmission line problems, such as microstrip lines or cpw, in theory, the size of the. Ansoft high frequency structure simulator release 8. Jul 06, 2015 this video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. Calculation assumes that you are using a 50 ohm microstrip. Lumped port reduced height lumped port narrow l can be reduced by moving the ground plane up towards the track, shortening the port. Hfss waveport simulation for cpw transmission line z0.
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