Hfss waveport simulation for cpw transmission line z0. To access online help from the hfss user interface, do one of the following. Generalized sparameters are computed by matching the fields on. Simulation of cpw in hfss circuit design electrical. Open a previously saved project using the fileopen command. 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. Radio propagation plays a major role in the design of 3g mobile systems with acceptable quality for the offered service. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port. The parameters of the antenna are simulated and optimized with hfss. You will probably want to use the zpi form and an impedance line.
Read the section on impedance calculation in hfss help. Cpw coplanar waveguide basics, advantages,disadvantages. 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. How do you design a port in hfss for cpw feed slot antennas. Contribute to courserepsecen452 spring2016 development by creating an account on github. Coplanar waveguide cpw hfss v8 training this presentation is one in a series of port tutorials, intended to help users. The hfss transient solver is a 3d fullwave transient or time domain electromagnetic field solver based on the discontinuous galerkin method dgtd. Wadell artech house publishers isbn 0890064369 hf filter design and computer simulation randall w. 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. Ansys high frequency structure simulator hfss tutorial. For transmission line problems, such as microstrip lines or cpw, in theory, the size of the.
For example, quasitem field solver and fullwave field solver. High frequency structure simulator for 3d electromagenetics hfss is a platform that includes multiple simulation technologies for component or system design. Dk is a very important property for microwave pcb design. Shanghai jiaotong daxue xuebaojournal of shanghai jiaotong university, vol. 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.
With our online resources, you can find hfss tutorial or just about any type of ebooks, for any type of product. 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. 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. In terms of circuit isolation, you can get great isolation using cpw, because there are always rf grounds between traces. Two typical coplanar waveguides are diagrammed in cross section below.
Much has been written about terminating pcb traces in their characteristic impedance, to avoid signal reflections. The commercial emsimulators, such as ansoft hfss, sonnet, cst microwave studio etc. 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. The system requirements are the high capacity, the high data rate, the high. Hfss tutorial cpw menu computing button computing scribd. Ansys high frequency structure simulator hfss tutorial august 16, 2018 1 mark jones pacific northwest national laboratory 82118.
Using hfss, simulate an airfilled wr90 waveguide shown above. This page covers cpw coplanar waveguide basics and provide advantages and disadvantages of coplanar waveguide the coplanar waveguide is a planar transmission line. Measurement and simulation of coaxial to microstrip. Keysight eesof eda microstrip and cpw power divider design. Synthesis and analysis of microstrip and stripline. The width of the ground electrode pads are increased to satisfy the setting of excitation and boudary conditions for the cpw structure. Hfss offers two different interfaces to same solver to accommodate different workflows 3d view for cad. Small and largesignal modeling of siliconbased substrates. Cpwfeed, microstrip patch antennas, radiation pattern, return loss. However, it may not be clear when transmission line techniques are appropriate. The base hfss offering includes 3d and layout interfaces, 2. To obtain the field patterns, intrinsic impedance and. Design and simulation of the broadband unidirectional cpw. The objective is to provide a very thorough introduction to hfss as applied to antenna design, which may be followed stepbystep in.
Thus in this tutorial, a dipole antenna will be constructed and analyzed using the hfss simulator. Synthesis is compared between the provided tool and designer, as hfss is strictly an analysis tool. Pdf high frequency structure simulator hfss tutorial. Cpw transmission lines often cause significant grief as they are mode rich.
Coplanar waveguide cpw fed bowtie antenna using the ansoft hfss design. However, these are not convenient for interactive design cad tool of the cpw structures. You specify the name of the project when you save it using the filesave or filesave as. The modal complex propagation constants and characteristic impedances are computed. I have a cpw transmission line that i am tweaking the dimensions of to try and get 50 ohm characteristic impedance. Design and simulation of the broadband unidirectional cpwfed rectangular slot antenna. It shows the electric and magnetic vector fields at 10ghz as well as.
Problem description getting started create the 3d model analysis setup plot sparameters vs. Hfss initial project setup opening a new project if a new project and new design are not already opened, then. A good guideline to determine when the transmission line approach is necessary for logic signals. 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. Coplanar waveguide cpw fed bowtie antenna using the ansoft. I am beginner for slot dipole antennas and hfss so please help me.
A twodimensional eigenvalue problem is solved first to find the waveguide modes of this port. Microstrip line to waveguide transition em field of the. 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 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. The coplanar waveguide cpw is commonly used in microwave circuits. Getting started with hfss v9 for antenna design october, 2003 this getting started training material is intended for new users of hfss. Make sure the mode and impedance line make sense by examining the port field configuration for each mode. 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. Scribd is the worlds largest social reading and publishing site. Ansoft designer and ansoft hfss, for example microstrip and stripline structures. Comsol multiphysics, with the rf module, makes it easy to compute the impedance, fields, losses, and other operating parameters needed when designing a cpw.
Materials used in pcb technology generally have dk from 2 to 10 dk is dimensionless. Hfss waveport simulation for cpw transmission line z0 mismatch so i cant quite figure out what seems to be the problem. This is an animation from a simulation of a coplanar waveguide cpw done in ansys high frequency structural solver hfss. Many examples of highisolation rf switches have used grounded cpw to get 60 db isolation or more. It is widely used for microwave integrated circuit design. Microstrip patch antenna simulation setup for microstrip fed patch antenna. Ansys hfss tutorial simulate and analyze an example of trace and via tianjian lu 02014 tianjian lu ece 546. The information contained in this document is subject to change without notice. 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. Sievenpiper mushroom how to analyze the sievenpiper highimpedance structure supporting a backward wave.
The designed antenna at the frequency 10 ghz achieves the impedance bandwidth 4. You will be glad to know that right now hfss tutorial pdf is available on our online library. Hfss tutorial 2microstrip patch antenna with a cutting slot coaxial feed how to cut slot in patch duration. Measurement and simulation of coaxial to microstrip transitions radiation properties and substrate in. This paper proposes a new trapezoidal cpwfed uwb antenna that the bandwidth return loss. The advantage of having a thick substrate is realized when you fabricate cpw mmics. To open a help topic about a specific hfss dialog box, open the dialog box, and then press f1. Parallel plate introduction to dispersion diagrams and eigenmode simulator. In hfss desktop, click the on the standard toolbar, or select the menu item file new. Hfss tutorial courserepsecen452spring2016 wiki github.
Open the em setup window, define the required dielectric as described in earlier labs and do the following additional actions. The antenna was etched on a singlelayer coppercladding substrate, of which the material was fr4 with relative permittivity of 4. This tetrahedral finite element technique exploits the same automatic adaptedforaccuracy meshing technology that made hfss the gold standard for accuracy in. The hfss manual even has an example of microstrip transmission lines. Tem waves use zvi impedance zvi zpi zpv projects with hfss.
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