Chapter 5 analysis and modeling of coplanar waveguide. It is widely used for microwave integrated circuit design. Design and simulation of the broadband unidirectional cpw. Open the em setup window, define the required dielectric as described in earlier labs and do the following additional actions. Hfss tutorial cpw menu computing button computing scribd. Synthesis and analysis of microstrip and stripline.
The hfss manual even has an example of microstrip transmission lines. Hfss tutorial pdf hfss tutorial pdf are you looking for ebook hfss tutorial pdf. However, the results of the synthesis calculations are analyzed in hfss as a sortof check graphical user interface gui. A random number generator in matlab can be used to select a new dimension, resimulate in hfss, then repeat for a large number of dimensions from the random number generator. Two typical coplanar waveguides are diagrammed in cross section below. Ansys hfss tutorial simulate and analyze an example of trace and via tianjian lu 02014 tianjian lu ece 546. Tem waves use zvi impedance zvi zpi zpv projects with hfss. However, these are not convenient for interactive design cad tool of the cpw structures. Materials used in pcb technology generally have dk from 2 to 10 dk is dimensionless. Cpw coplanar waveguide basics, advantages,disadvantages.
This paper proposes a new trapezoidal cpwfed uwb antenna that the bandwidth return loss. To open a help topic about a specific hfss dialog box, open the dialog box, and then press f1. The commercial emsimulators, such as ansoft hfss, sonnet, cst microwave studio etc. The base hfss offering includes 3d and layout interfaces, 2. 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. Contribute to courserepsecen452 spring2016 development by creating an account on github. The advantage of having a thick substrate is realized when you fabricate cpw mmics.
This tetrahedral finite element technique exploits the same automatic adaptedforaccuracy meshing technology that made hfss the gold standard for accuracy in. Design and simulation of the broadband unidirectional cpwfed rectangular slot antenna. You will probably want to use the zpi form and an impedance line. For transmission line problems, such as microstrip lines or cpw, in theory, the size of the. Hfss tutorial 2microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch duration. Modeling superconductors using surface impedance techniques by diana prado lopes aude submitted to the department of physics on may 21st, 2010, in partial fulfillment of the requirements for the degree of bachelor of science in physics abstract this thesis develops a simulation tool that can be used in conjunction with commercially. In hfss desktop, click the on the standard toolbar, or select the menu item file new.
Parallel plate introduction to dispersion diagrams and eigenmode simulator. The antenna was etched on a singlelayer coppercladding substrate, of which the material was fr4 with relative permittivity of 4. To access online help from the hfss user interface, do one of the following. 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. Open a previously saved project using the fileopen command. Make sure the mode and impedance line make sense by examining the port field configuration for each mode. Microstrip patch antenna simulation setup for microstrip fed patch antenna. Using hfss, simulate an airfilled wr90 waveguide shown above. Coplanar waveguide cpw hfss v8 training this presentation is one in a series of port tutorials, intended to help users. Hfss waveport simulation for cpw transmission line z0.
I am beginner for slot dipole antennas and hfss so please help me. Scribd is the worlds largest social reading and publishing site. Ansoft corporation hfss field calculator cookbook ansoft hfss field calculator cookbook a brief primer and collection of stepbystep calculator recipes for use in hfss fields postprocessing notice. Hfss offers two different interfaces to same solver to accommodate different workflows 3d view for cad. Wadell artech house publishers isbn 0890064369 hf filter design and computer simulation randall w. Many examples of highisolation rf switches have used grounded cpw to get 60 db isolation or more. Getting started with hfss v9 for antenna design october, 2003 this getting started training material is intended for new users of hfss. Generalized sparameters are computed by matching the fields on.
Coplanar waveguide cpw fed bowtie antenna using the ansoft. Sievenpiper mushroom how to analyze the sievenpiper highimpedance structure supporting a backward wave. High frequency structure simulator for 3d electromagenetics hfss is a platform that includes multiple simulation technologies for component or system design. A good guideline to determine when the transmission line approach is necessary for logic signals. It shows the electric and magnetic vector fields at 10ghz as well as.
The coplanar waveguide cpw is commonly used in microwave circuits. The information contained in this document is subject to change without notice. Hfss ansys hfss is a 3d electromagnetic em simulation software for designing and simulating highfrequency electronic products such as antennas, antenna arrays, rf or microwave components, highspeed interconnects, filters, connectors, ic packages and printed circuit boards. Cpw transmission lines often cause significant grief as they are mode rich.
The objective is to provide a very thorough introduction to hfss as applied to antenna design, which may be followed stepbystep in. Measurement and simulation of coaxial to microstrip transitions radiation properties and substrate in. Read the section on impedance calculation in hfss help. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. Small and largesignal modeling of siliconbased substrates. Hfss tutorial courserepsecen452spring2016 wiki github. I have a cpw transmission line that i am tweaking the dimensions of to try and get 50 ohm characteristic impedance. Hfss initial project setup opening a new project if a new project and new design are not already opened, then. In terms of circuit isolation, you can get great isolation using cpw, because there are always rf grounds between traces. For example, quasitem field solver and fullwave field solver. Keysight eesof eda microstrip and cpw power divider design. The hfss transient solver is a 3d fullwave transient or time domain electromagnetic field solver based on the discontinuous galerkin method dgtd. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. Ansys high frequency structure simulator hfss tutorial.
The width of the ground electrode pads are increased to satisfy the setting of excitation and boudary conditions for the cpw structure. Cpwfeed, microstrip patch antennas, radiation pattern, return loss. This page covers cpw coplanar waveguide basics and provide advantages and disadvantages of coplanar waveguide the coplanar waveguide is a planar transmission line. The system requirements are the high capacity, the high data rate, the high. In this paper, we tried an antenna which consists of a patch having uslot, surrounded by closely spaced ground conductor and a cpw feed line it is designed in millimeterwave pozar1983 bhartia1991. The designed antenna at the frequency 10 ghz achieves the impedance bandwidth 4.
Ansys high frequency structure simulator hfss tutorial august 16, 2018 1 mark jones pacific northwest national laboratory 82118. How do you design a port in hfss for cpw feed slot antennas. However, it may not be clear when transmission line techniques are appropriate. Radio propagation plays a major role in the design of 3g mobile systems with acceptable quality for the offered service. You will be glad to know that right now hfss tutorial pdf is available on our online library. The modal complex propagation constants and characteristic impedances are computed. Comsol multiphysics, with the rf module, makes it easy to compute the impedance, fields, losses, and other operating parameters needed when designing a cpw. The imaginary component of complex permittivity is df dissipation factor. Tools options hfss options general tab check use wizards for data input when creating new boundaries check duplicate boundariesmesh operations with geometry click ok. With our online resources, you can find hfss tutorial or just about any type of ebooks, for any type of product. Measurement and simulation of coaxial to microstrip. Ansoft designer and ansoft hfss, for example microstrip and stripline structures. Problem description getting started create the 3d model analysis setup plot sparameters vs. Pdf high frequency structure simulator hfss tutorial.
Thus in this tutorial, a dipole antenna will be constructed and analyzed using the hfss simulator. Defining the cpw substrate without the ground at the bottom will require the substrate to be defined differently than what we have done so far. Shanghai jiaotong daxue xuebaojournal of shanghai jiaotong university, vol. Now that youve completed this tutorial you understand how to create new designs in hfss position and size parts using variables modify parts using boolean operators like subtract navigate view in hfss edit material properties and aesthetic properties assign wave ports calculate waveguide mode cutoff. This can be used to get upper and lower bounds on device performance when dimensions are varied randomly, as can happen in the fabrication process. You specify the name of the project when you save it using the filesave or filesave as.
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