To excite a microstrip patch antenna fed by a microstrip line to calculate the input impedance and sparameters, as well as to compute the radiation pattern with a farfield feature, you can assign a lumped port on the gap between the end of the microstrip line. Basic two resonator hfss project combline filter design 21 distance between resonators is fixed iris width controls coupling some details ignored, like corner radii lossless model faster no corrections to kij make it parametric for future reuse lumped ports for tuning in our circuit simulator fem mesh is not. Knowledge of microwave electronic principles including sparameters, transmission lines and antenna farfield radiation patterns. 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.
Mar 09, 2015 an example of a userdefined lumped port geometry. Go to start menu, and under all programs go to the following program. It was originally developed by professor zoltan cendes. They will tell you how to define a lumped port and size of the port. Analysis must include first three modes te10, te20, te01 3. Without this setup, the following warning would show up during simulation. Hfss is one of several commercial tools used for antenna design, and the design of complex radio frequency electronic circuit elements including filters, transmission lines, and packaging.
To obtain the field patterns, intrinsic impedance and wavelength for the first 4 modes. Extract lumped element equivalent circuit model by numerical methods. The wave port in ie3d is called extension for waves. For microstrip, you would make a rectangle from the upper conducter line to the the ground and insert an integration line from bottom to top.
Lumped excitation of cpw fed slot bowtie antenna by hfss. To determine if the results are as expected, you compare hfss s sparameter calculations at each septum position on a. A comparison of ansoft hfss and cst microwave studio. Your guide to lumped ports in the rf module comsol blog. I want to define a lumped port in hfss driven terminal solution type to model a voltage source with an internal resistance of 5 kohms. I used to run simulation for the antenna with lumped port till very recently.
How to set lumped port and wave port in hfss duration. High frequency structure simulator for 3d electromagenetics hfss is a platform that includes multiple simulation technologies for component or system design. Yes, you will want to define a port at each end of the conductor the ports will be defined between conductor and ground. Upon your first start it will state that the libraries have been reset. Ansys hfss 15 is a reliable application for electronic devices with support for electromagnetic study and reliable simulation features. Leftclick to define the origin of the efield vector. Blade antenna assign excitations select port from the sheets section of the modeler tree select the menu item hfss ie excitations assign lumped port port name. Hfss frequency domain solver converges much faster than the cst time domain solver. So, i am defining a sheet which is assigned as the lumped port, and then after a short distance which is modeled by a cylinder, i define another sheet to assign 5 kohms to it as the interal impedance of. It provides a minimum mesh density over all objects. Hfss is a commercial finite element method solver for electromagnetic structures from ansys. The example will illustrate both the simplicity and power of hfss through.
The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. Lumped port selection this presentation is one in a series of port tutorials, intended to help users better understand the nuances of model hfss ppt. Ansoft high frequency structure simulator v10 training seminar p411 presentation 4 lambda refinement lambda refinement is the process of refining the inital mesh such that all tetrahedra are smaller than a certain fraction of the wavelength. Creating and deploying vendor 3d components in ansys hfss.
Click waveport, name it as your preference, then click next, now define your integration line. The key is that the lumped port is on an ideal wire that connects one metal body to another body or pec boundary condition. Assign lumped port edit select by name select source hfss excitations assign lumped port set the lumped port as shown in the picture. Is there any free download version for this software. The base hfss offering includes 3d and layout interfaces, 2.
Similarly, if the 3d component model has lumped port excitations, the target design should use the terminal solution type. Creating and deploying vendor 3d components in ansys hfss figure 4. How do you design a port in hfss for cpw feed slot antennas. I am trying to simulate a dipole antenna using hfss. A powerful application for electrical systems and electromagnetic behavior analysis, ansys hfss 15. Ive followed every step very carefully and am able to get something that attached is a tutorial for a dipole printed on a dielectric substrate design using hfss. This video demonstrates the use of several modeling tricks in ansys hfss to create a microstrip design and excite it with a lumped port.
Hfss running the simulation and checking the progress. Completion of the hfss getting started course or equivalent familiarity with hfss 3d modeler, workflow, solver setup, and postprocessing plotting results graphs. This may result in overestimation or underestimation of sar by up to 30%. The excitation is the same as wave port, but impedance is computed by vi where i is the total current. Ansoft high frequency structure simulator v10 training seminar. Do anyone have an hfss manual or tutorial explaining this process. Compute the reflection and transmission coefficients of a frequency selection surface. For example, press enter means to press the key labeled enter. Ansys 2019 r3 academic license hfss lumped port drawing. Does anyone have an idea about the wave port or lumped port in hfss,which should. The boundary selection of the uniform lumped port across a slot. How does one do this for stripline when you have two ground planes top and bottom and the conductive line in the middle. General navigation of software menus, toolbars, and quick keys. Tools options hfss options general tab check use wizards for data input when creating new boundaries check duplicate boundariesmesh operations with geometry click ok.
Port or incident field used to excite the structure. Hi, check the attached tutorial which explains on how to use lumped ports for different transmission lines. Chapter 2 application of em simulators for extraction. The larger the rectangle, the bigger the electromagnetic discontinuity to your lumped port. Lecture 11 hfss boundary conditions free download as pdf file. But in driven terminal the sheet is defined as port and we just need to. Hfss tutorial courserepsecen452spring2016 wiki github. Hi, i was wondering how does one feed a stripline with a lumped port in hfss. The acronym stands for highfrequency structure simulator.
Solver on demand 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. Ansys high frequency structure simulator hfss tutorial. Ansys high frequency structure simulator hfss tutorial august 16, 2018 1 mark jones pacific northwest national laboratory 82118. Lumped port selection this presentation is one in a series of port tutorials. So you will always have that discontinuity as current flows from the big body down to the connection point of the ideal wire.
Rectangular waveguide hfss r objective getting started with hfss a tutorial using hfss, simulate an airfilled wr90 waveguide shown above. High frequency structure simulator hfss tutorial prepared by. If your solution type is driventerminal, you may use edit sources to terminate one of the ports with a matched resistance value you will need to toggle terminal excitation type to total voltage in the edit sources window first. Scribd is the worlds largest social reading and publishing site. I proceed exactly as mentioned in the guide, but im not able to assign terminals. Unable to assign waveports in patch antennas in hfss. Compare lumped boundary and surface impedance boundary usage. 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.
1347 1221 1345 1072 478 843 1326 1472 1117 909 444 463 1071 844 384 792 1442 938 692 413 198 1423 1541 102 1507 242 1302 1495 453 1508 66 786 912 653 917 1095 226 10 1321 951 973 276 709