Bi, i have done extensive simulation on hfss, both ansoft and agilent, and the cpw problem has always frustrated me, but found that i could generally. Pdf high frequency structure simulator hfss tutorial. Cpw feed, microstrip patch antennas, radiation pattern, return loss. Cpws is to surround the structure with a metallic box as typically associated with a shielded em simulation. Only the wave port and the lumped port types will be discussed in detail in the following sections. Chandrasekhar, please send me that powerpoint file. Both the wave port and lumped port are available for use in both the driven modal solution type and the driven terminal solution type. Hfss setup for the surrounding groundring excitation. Pros it is a compact solution cons it is not possible to. Simulation structure of cpw inside aluminum cover using wave ports in hfss. Always perform a solve ports only solution to ensure the waveport is correct. To deembed a port, expand the excitations section under the design name in the project manager window and click on the. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. To access online help from the hfss user interface, do one of the following.
The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. Fundamental principles, concepts, and use slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Bi, i have done extensive simulation on hfss, both ansoft and agilent, and the cpw problem has always frustrated me, but found that i could generally coax the simulator into doing. Rectangular waveguidetocoplanar waveguide transitions at u. I read that a lot saying that it needs to meet the minimum sizing for wave port depending on the width and spacing of the cpw parameters. In order to simulate the design, we must createassign at least one port excitation. But in the cpw fed slotantenna design, i dont see how could i make it. The work offers an indepth understanding of the different types of rf and microwave circuit elements, including inductors, capacitors, resistors, transformers, via holes. This is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. Optimization of packaging for pin photodiode modules. This is a comprehensive treatment of lumped elements, which are playing a critical role in the development of the circuits that make these costeffective systems possible. How to set lumped port and wave port in hfss duration.
In lumped port node, you didnt select any boundary. Lumped excitation of cpw fed slot bowtie antenna by hfss. Hi, 1,draw one rectangle which contact to the edge of the top and. Abstractthis paper presents rectangular waveguidetocoplanar waveguide cpw transitions at uband 40 60 ghz using eplane probe and wire bonding. A simple microstrip transmission line is design here. Voltage source is not the best option for your design. Silist how assign lumped port in hfss for stripline. 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 used especially for microstrip patch antenna in uwb range i. If you continue browsing the site, you agree to the use of cookies on this website. Waveguide port is the best port model for cpw designs. I am following a cpw example to make mine and get familiar with comsol, but when i execute the boundary mode analysis study i. This part takes approximately 1 to 2 hours with 5hour rate. To open a help topic about a specific hfss dialog box. Hfss assumes that each wave port you define is connected to a semiinfinitely long waveguide that has the same crosssection and material properties as the port. The nominal dimensional parameters used in this study are the ribbon width s 1 10. Ports and lumped ports for wave electromagnetics problems. Length of waveguide is arbitrary, make it a few wavelengths. To plot the radiation pattern of slot antenna using hfss. Cpws can easily be designed to operate at frequencies up to 10 ghz or higher. Hfss tutorial cpw menu computing button computing scribd.
To deembed a port, expand the excitations section under the design name in the project manager window and click on the port number. Rectangular waveguidetocoplanar waveguide transitions at. If you have something useful that we can add, send it along to us. Aug 19, 2018 this video shows how to design an endlauncher type sma connector in hfss from the scratch. The designs of cpws based on quartz substrate with and without aluminum cover are explained. Ansoft software, and then allows you to download any updates if they are available.
A lumped port located between the center conductorand the metallic box pec ground bridge lumped port fig. Your guide to lumped ports in the rf module comsol blog. Selection of a wave or lumped port depends on the terminal location, number of terminals, and terminal separation. Shown below are examples of commonly used wave ports with. Only the wave port and the lumped port types will be. To open a help topic about a specific hfss dialog box, open the dialog box, and then press f1. To address the excitation and termination of a coplanar waveguide cpw or the common or differential mode on two parallel microstrip lines, use the multielement uniform type coplanar waveguides.
How do you design a port in hfss for cpw feed slot antennas. Hfss waveport simulation for cpw transmission line z0. The length of the line must be long enough such that only one propagation mode exists on the reference plane of the port. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. The boundary selection of the coaxial lumped port in a 2d axisymmetric model. It should be applied only to an outer face of the solution space.
There are a few different types of excitations to choose from, but the most common excitation we use in this lab is the wave port. Adam nykoruk mccaughan submitted to the department of electrical engineering and computer science on may 21, 2010 in partial ful llment of the requirements for the degree of master of engineering in electrical engineering and computer science abstract over the last decade, quantum information experiments with trapped ions have demon. 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. I am following a cpw example to make mine and get familiar with comsol, but when i execute the boundary mode analysis study i get errors during multiphysics. A lumped port lumped port lumped port lumped port excitation will. Feb, 2003 the port need to be large enough to reduce edgeeffect. Simulation of cpw in hfss circuit design electrical.
Cpwfeed, microstrip patch antennas, radiation pattern, return loss. Cpw feeding simulation with hfss problem, sma vs port. It shows the electric and magnetic vector fields at 10ghz as well as. Ansoft hfss 3d boundary manager go back contents index sources port wave ports lumped gap sources considerations when defining ports incident wave voltage and current sources magnetic bias port by default, the interface between all 3d objects and the background is a perfect e boundary through which no energy may enter or exit. The ansoft high frequency structure simulator hfss is a fullwave electromagnetic em software package for calculating the electromagnetic behavior of a 3d structure. Microstrip line design in hfss part1 use captions. How assign lumped port in hfss for stripline sipi exchange.
I am new to comsol and am modeling a coplanar waveguide. Apr 19, 2016 since we will be using a trl calibration when measuring our devices, it is important to use port deembedding in our hfss simulations so that the reference plane is the same for simulated and measured data. Figures 3 and 4 show the reflection coefficients of structure 1 and 2 versus frequencies with various dielectric layer thicknesses. Each port lies across a gap between the center conductor and the pec. Wave ports solve a distributed field in a 2d plane, while lump ports excite a single current source. The simulated waveguide length l is 1 mm and conductors are 500 nm thick t. Propagation constant an overview sciencedirect topics. 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. Hi i am currently using hfss simulating a grounded cpw tline on silicon substrate. A 3d hybrid integration methodology for terabit transceivers. A lumped port excitation will be used for the cpw feed. Jun 22, 2015 a simple microstrip transmission line is design here.
Floquet port 12 introduction floquet ports in hfss the floquet port in hfss is used exclusively with planarperiodic structures. In ansoft hfss simulation software i build a coplanar waveguide. The simulation methodology for multiconductor structures are explained. Filter design using ansoft hfss university of waterloo. To determine if the results are as expected, you compare hfsss sparameter calculations at each septum position on a 2d xy plot. Mar 09, 2015 an example of a userdefined lumped port geometry. To address the excitation and termination of a coplanar waveguide cpw or the common or differential mode on two parallel microstrip lines, use the multielement uniform type coplanar. Modelling of 3d multilayer coplanar waveguide structure. A lumped port can be defined on any 2d object that has edges. Keysight eesof eda microstrip and cpw power divider design. When a coplanar waveguide cpw is excited or terminated using a single lumped port boundary, it requires a conductive airbridge between the. Hfss assigning wave ports courserepsecen452spring2016.
Design and vnameasurement of coplanar waveguide cpw on. 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. A 3d multilayer cpw structure structure 2 the model is then simulated using hp hfss for frequencies from ku to ka bands. Copper lumped port excitation create a lumped port and excite it. Calculation assumes that you are using a 50 ohm microstrip. Since we will be using a trl calibration when measuring our devices, it is important to use port deembedding in our hfss simulations so that the reference plane is the same for simulated and measured data. To address the excitation and termination of a coplanar waveguide cpw or the common or differential mode on two parallel microstrip lines, use the multielement uniform type.
Basic electromagnetic field quantities and, for open. Left and right edges of port should touch left and right ground planes of cpw. Chief examples are planar phased arrays and frequency selective surfaces when these may be idealized as infinitely large. This port type is very useful for exciting microstrip, stripline, coaxial, or waveguide transmission lines. Roke presentation title 2 using hfss successfully at 77ghz data sheets give you the dielectric constant and the loss tangent. Proprietary ansoft hfss antenna design kit arien sligar. Wave port represents the surface through which a signal enters or exits the geometry. Coplanar waveguide port size is determined by inner dimensions of waveguide. Users may download and print one copy of any publication from the public portal for the purpose. The device must be connected by a section of transmission line or waveguide supporting traveling waves. Simulation structure of cpw using lumped ports in hfss.
Tools options hfss options general tab check use wizards for data input when creating new boundaries check duplicate boundariesmesh operations with geometry click ok. The results should only be used as an estimate for the waveport size. Does anyone have an idea about the wave port or lumped port in hfss,which should be used especially for microstrip patch antenna in. Coplanar waveguide resonators for circuit quantum electrodynamics. Ports in 3d modeling tools specify a location for maxwells equations to solve for the fields used to excite the model. Use wave ports on the front and back faces of waveguide. Set up and run a sonnet em simulation project of a coplanar waveguide cpw transmission line including the port designations for differential signaling. To download the hfss fie of the same sma connector, subscribe to youtube channel and join the facebook.
175 1552 1100 449 656 106 240 228 296 1287 1338 1140 1023 642 1102 844 708 438 686 74 63 49 11 241 1366 258 847 128 540 1022 172