Ansys hfss tutorial simulate and analyze an example of microstrip line drew handler, jerry yang october 20, 2014. The electrical parameters may be determined from specified physical parameters, or the physical parameters required to meet a given set of electrical parameters may be found. The analyze method computes the analyzedresult property of the transmission line using the data stored in the rfckt. Using the microstrip line calculator, a width of 1. This cgi program makes use of the cgic library which carries the following. Modeling approximation can be used to design the microstrip trace. The resonance frequency of s11 and s21 were different. Due to the fields within two guidedwave media, the microstripdoes not support a pure tem wave. Modeling approximation can be used to understand the impedance of the differential microstrip transmission line. Advantages and disadvantages of microstrip line are mentioned below. Tzonglin wu department of electrical engineering national taiwan university prof.
Inductance of microstrip lines microstrip lines used as shunt inductors application note an258, rev. Microwave impedance calculator from rogers corporation. Wu microstriplines microstrip structure inhomogeneous structure. This calculator finds both odd and even transmission line impedance.
The characteristic impedance z o of a microstrip transmission line can be calculated using the active calculator or the equations at the bottom of the page. This tool calculates key parameters for most common microwave transmission lines, including microstrip, stripline, and coplanarwaveguide transmission lines. Download multiple dielectric impedance calculator for free. Advanced design system tutorialmicrostrip line design mini knowledge. Pasternacks microstrip calculator computes a microstrips heightwidth ratio, impedance and relative dielectric constant for a microstrip transmission line. If you really want to do this, better use the coupled microstrip model in the loss calculator instead to get the right loss value to compare to the differential loss plotted from measurements.
Rogers is offering the newest version of its microwave impedance calculator, mwi2010 for free download. In the ipcs publication ipc2141, the impedance of a microstrip line is given by. This software is intended to assist with microwave circuit design in predicting the impedance of a circuit made with rogers high frequency circuit materials. I did sparameter simulation of simple microstrip line. Realizing small inductor values on a pcb by using microstrip lines. I think the both frequencies should be equal because minimum s11 means the lowest reflection, that is to say,incident wave can pass undisturbedly.
A crosssection of a microstrip transmission line is shown below. The transmission line parameter calculator app computes resistance r, inductance l, conductance g, and capacitance c as well as the characteristic impedance and propagation constant for some common transmission lines types, such as a coaxial line, twin lead, microstrip line, and coplanar waveguide cpw. The softwares intuitive graphical user interface gui screen allows a user to select from a variety of different transmissionline types, including conventional microstrip, edgecoupled microstrip, conventional stripline, offset stripline, and conductorbacked coplanarwaveguide cpcpw transmission lines. Txline 2003 microstrip, stripline, coplanar waveguideground, round coaxial, slotline, coupled microstripstripline txline 2003. The mwi2010 microwave impedance calculator is a transmission line modeling tool for electronics engineers. The microstrip line calculator calculates the characteristic impedance, effective dielectric constant and time delay per unit length of a microstrip line.
Calculate microwave impedance with transmissionline. Edge coupled microstrip impedance tool eeweb community. Download the file here or directly from jeans website at. Follow the installation guide to install the software on your pc. Microstrip pcb impedance in an electric circuit causes an electromotive force to be generated by a change in the current flowing. Description the inductance calculated using this tool is the external inductance of the loop bounded by the flat conductor and the ground plane.
Microstrip capacitance model capacitance between the upper conductor and ground plane is. As line loss increased,the difference also increased. Microstrip line inverted,suspended,shielded microstrip line. Heres a reverse microstrip calculator a spreadsheet that lets you specify impedance and solves for line width. In this pcb calculator, microstrip line of capacitance per unit length is expressed in fm. The software also has some capabilities for predicting transmission line losses as well. Pcb impedance calculator single ended differential. Some studies on microstrip patch antenna using pcaad 5. It uses linear interpolation, and is explained on this page. This article describes microstrip line variants viz. The width of the traces has a direct impact on the capability of the power supply to minimize noise. You will need to email your computer name and a copy of the purchase. Easy microstrip line calculator from agilent technologies appcad version 3.
By understanding the microstrip transmission line, designers can properly build these structures to meet their needs. The transmission line is directed along zaxis, its cross section is shown on the sketch. Stripline and microstrip are methods of routing high speed transmission lines on your pcb design. Stripline is a transmission line trace surrounded by dielectric material suspended between two ground planes on internal layers of a printed board. Description the capacitance calculated using this tool is the capacitance between a flat conductor and the ground plane over the conductor length. Is there any free software where i can design a microstrip. There are some advantages to using a microstrip transmission line over other alternatives. Utilizing a pcb transmission line calculator makes design. Microstrip transmission line characteristic impedance calculator. The tool is very easy to use and is fairly accurate. The analyze method treats the microstrip line as a 2port linear network and models the line as a transmission line with optional stubs. This calculator provides accurate microstrip transmission line analysis and synthesis. A simple microstrip transmission line is design here. Is there any free software where i can design a microstrip patch antenna.
Tx line software is a free and interactive transmission line utility for the analysis and synthesis of transmission line structures that can be used directly in microwave office for matchingcircuit and other highfrequency designs users need only specify the material properties for common transmission mediums such as microstrip and stripline and either the. Microstrip transmission line simulation quickfield fea. Microstrip inductance model inductance of the loop bounded by the upper conductor and ground plane is. Microstrip is most popular structure used for rf design and product development due to easy in fabrication and complete exposure for troubleshooting. The edge coupled differential microstrip transmission line is a common technique for routing differential traces. Ads advanced design system tutorialmicrostrip line design. Microstrip analysissynthesis calculator sourceforge. Having an outside pcb transmission line calculator can save you some hassle in the future. Analysis also includes a shielded enclosure with metal lid 100 mils above the surface of the alumina substrate. Capacitance is the capacity of an electric circuit to store an electric charge. This example shows a microstrip branchline coupler on alumina er 9.
Multiple dielectric transmission line calculator using a 2d field solver to compute the transmission line characteristics from the circuit trace dimensions entered by the user. When the longitudinal components of the fields for the dominant mode of a microstrip. The microstrip is a very simple yet useful way to create a transmission line with a pcb. Microstrip line design in hfss part1 use captions. Txline software is a free and interactive transmissionline utility for the analysis and synthesis of transmissionline structures that can be used directly in microwave office for matchingcircuit and other highfrequency designs users need only specify the material properties for common transmission mediums such as microstrip and stripline and either the. Pcb impedance calculator single ended differential pair. High frequency electronics toolbox for microwave engineers, rf professionals, emc technicians, radioamateur,students, astronomer and electronic hobbyists. Enter values for zo and electrical length to determine the physical width and length of the microstrip line. There are four types of impedance used in characterizing differential trace impedances. Appcads developer is now part of avago technologies, subsequently appcad has been rebranded from agilent technologies to avago technologies. Microstrip calculator online microstrip impedance finder. Cgic, 1996, 1997, 1998, 1999, 2000 by thomas boutell and. This relationship can be rearranged to show width, w, explicitly as. A shielded microstrip transmission line consists of a substrate, a microstrip, and a shield.
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