A dual band microstrip patch antenna for rf energy harvesting. Hfss automatically computes standard antenna metrics such as gain, return loss, input impedance, radiation efficiency and full 3d near and far field patterns. From your figure, 7ghz will have its main beam towards. I was wondering if anyone has used ansoft hfss and could help me with a simple problem. Hfss is a commercial finite element method solver for electromagnetic structures from ansys. Table 2 result analysis using hfss analysis parameter of antenna.
Though you would assume that it would create a vacuum and solve accordingly without it, it will show unexpected. How to see 2d, 3d radiation pattern and current distribution in hfss duration. The design is analysed by finite element method fem based hfss simulator software 14. How to find the radiation pattern in e plane and h plane. The radiation pattern of a dipole antenna is of particular importance for many reasons it needs to be orientated so that it picks up the maximum level of signal or radiates the maximum amount of signal in the required direction. These omnidirectional antennas are ideal for indoor deployments and mobile applications. How to check eplane hplane radiation patterns in hfss. It is one of several commercial tools used for antenna design, and the design of complex rf electronic circuit elements including filters, transmission lines, and packaging. The radiation pattern reflects the amount of power radiated from the dipole in any given direction.
Ansys hfss can help designers predicting the radiation pattern in a. Figure 7a present the radiation pattern of 2d radiation pattern at 2. Other software, like hfss can also compute the near field. Medfdtd is a 3d parallel electromagnetic simulation software for bioelectromagnetics by fdtd method. Vswr and radiation pattern measurements are carried out in microwave anechoic chamber.
Awr software helps engineers design, optimize, and integrate antennasarrays, providing powerful em technologies to simulate antenna metrics such as gain, return loss, radiation efficiency, and currents, and to visualize 2d3d farfield antenna patterns. The far field radiation pattern may be represented graphically as a plot of one of a number of related variables, including. Right click in the 3d modeler and select grid plane yz. The acronym stands for high frequency structure simulator hfss. Hfss is a 3d fem solver as opposed to ads momentums 2d mom. In far field radiation sphere setup window, select infinite sphere tab, in group of phi. Rectangular patch antenna array design at ghz frequency. One can simply understand the function and directivity of an antenna by having a look at its radiation pattern. My goal is to see what kind of radiation pattern an antenna or waveguide has if we substitute air with teflon. A radiation boundary filled with air is commonly used for radiating structures.
Antenna projects using hfss electronics electrical projects. When mounted with the radome facing up in a mobile application, as shown in the plot below, the radiation pattern is directed above the antenna making it possible to transmit and receive. The hfss model of the octaband microstrip patch antenna with dgs is shown in fig2. Reconfigurable patch antenna for software defined radio. But should you get traditional 2dimensional polar plots or 3dimensional spherical plots. Once you have decided to get your antenna patterned, you are well on your way to new insights into its performance and suitability for your application. Design and simulation of pyramidal horn antenna for ndt. By using hfss simulation tool, you have to generate xy, yz and xz planes radiation patterns.
It a slice of 3d pattern of the antenna at a particular angle plsne z0 in your case. To plot the radiation pattern, you need to first define a geometry over which to plot. In this example, we will plot over the xz phi 0deg and yz phi 90deg cutplanes. You can only view them as overlain on the 3d pattern using the farfield cut tab, i. The energy radiated by antenna is represented by radiation pattern of the antenna. The following figure shows the radiation pattern in 2d of the pyramidal horn antenna. The initial workshops describe all necessary steps, making this course accessible to new hfss users with any prior em electromagnetic antenna simulation experience. Another common radiation pattern cut a cut is a 2d slice of a 3d radiation pattern is when is fixed and varies from 0 to 180 degrees. The antenna proposed is a rectangular microstrip patch antenna having inset feed, the substrate used is fr4 epoxy. Proposed rectangular microstrip patch antenna using hfss software v. How to see 2d, 3d radiation pattern and current distribution in hfss. Omnidirectional antenna radiation patterns explained. Therefore, for high fidelity pattern analysis, you often need to use a custom radiation pattern obtained from measurements or simulations.
Rectangular patch antenna has been designed in hfss software and various. Hemispheric antennas and omnidirectional radiation pattern. You do not need to resolve the problem if you modify radiation surfaces in the far field. I am using the patch antenna from lab 9 for this demonstration since transmission lines are not designed to radiate. Active s11 and radiation pattern keysight community. Choose a web site to get translated content where available and see local events and offers. Abstractthe measurement of farfield radiation patterns is time. From menu, select hfss radiation insert far field setup infinite sphere. In hfss, how to plot 3d and 2 d radiation patterns for different values of theta and phi. Medfdtd can simulate electromagnetic radiation, calculate sar and temperature rise, estimate antenna radiation power, and all calculations can be performed in parallel. Based on your location, we recommend that you select. After you obtain the 2d radiation pattern, right click on the screen, then a menu will be displayed with markers at the top, next you can find trace characteristics.
The main drawback to not being able to do it in the mom solver as opposed to the schematic circuit solver is that in the mom solver you can find out the radiation pattern and antenna characteristics. Lavi agarwal prateek rastogi assistant professor m. Here i have shown simple steps for drawing antenna radiation pattern in originpro 8. Hey,i m facing problem in getting the radiation pattern in hfss 11,somebody please tell me about the options that i need to set in the traces window to get a new report of radiation pattern. You specify the name of the project when you save it using the filesave or filesave as. Open a previously saved project using the fileopen command. The 2d radiation pattern in mode1 is given in the figure 6. A great circle cut is when 0 and is allowed to vary from 0 to 360 degrees.
You can do more complex simulations with rudimentary rlc elements in ansoft hfss. Unfortunately empro cannot make 2d radiation pattern plots from gui. 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. From the plot above it seems that there are three resonant frequencies for which radiation pattern 2d is presented. Antenna toolbox provides impedance analysis that can be used to design matching networks with rf toolbox. Usually, the process of measuring twodimensional 2d or threedimensional 3d radiation patterns is time consuming and expensive. So basically when normally an antenna radiates into air. It is clear from the various results in terms of return loss, gain, radiation efficiency, bandwidth.
What are the values of phi and theta start and stop during declaring them in insert far field setup. Plot radiation pattern matlab patterncustom mathworks. For instance, a complete 3d radiation pattern with a spatial resolution in. The simulated radiation pattern is represented as an mby3 matrix where the first column represents the azimuth angle, the second column represents the elevation angle, and the third column represents the radiation pattern in db. Hfss is a 3d electromagnetic simulation software for highfrequency. The simulated results are shows that the proposed antenna provides good performance in terms of return loss and radiation pattern for dual frequency applications. Plot 2d phi slice of the antenna in polar coordinates. Reconfigurable patch antenna for software defined radio application.
Antenna array analysis with custom radiation pattern. Visualizing antenna radiation patterns singularity engineering llc. The coordinate system and the definitions of and used in hfss is shown in figure 2. Select programs ansys electromagnetics ansys electromagnetics suite. Simulated results in hfss when we completed the design part of the proposed antenna we got the simulated results of the antenna which includes return loss s11 parameter, vswr, 2d radiation pattern as well as 3d radiation pattern. Now, the simulation engine can be invoked by giving the proper. In any illustration, the sketch drawn to represent the radiation of an antenna is its radiation pattern. Dynamic electromagneticcircuit cosimulation with ansys designer provides rigorous endtoend analysis for an antenna system including, for example, effects of transceiver network. There is no standard convention for the coordinate system used to specify the radiation pattern, so the result from one simulation package often cannot not be directly used in another software package. S11 return loss, 2d radiation pattern, impedance bandwidth, 3db beamwidth, gain and other antenna parameters. Design fabrication and measurement of antennas 43 the assigning of boundary scheme. How to plot 3d and 2d radiation patterns of gain in hfss. Volumetric 2d field contours radiation pattern overlay.
How to export data from cst microwave studio to other software origin, hfss. The size of air column is taken to be equal to a quarter of the free space wavelength of the lowest frequency of operation. In the paper given an patch antenna with inset feed method is designed for dual band frequency of 2. So by rotating the antenna, we can obtain cuts of the radiation pattern for instance the eplane cut or the hplane cut. There are a few types of radiation pattern such as 3d radiation pattern, 2d radiation pattern and lobe formation radiation pattern.