Electromagnetic field solvers for applications across the em spectrum are contained within a single user interface in cst studio suite. Hfss masterslave simulation setup of a reflectarray consisting of an aluminum backed mylar substrate of height h, square unit cell periodicity p, and aluminum patch side length l. Techniques for analyzing antenna lattice structures. The solver enables as many floquet modes to be defined for each port.
Design and reflectivity analysis of high temperature wave. Mar 09, 2015 an example of a userdefined lumped port geometry. Ports locations in a unit cell of the periodic siw. George2278, i started using floquet ports new to hfss v11 which give you the advantage of.
Anything relating to electrostatics, magnetics, low frequency quasistatics or high frequency. The only questionable results will be the transmission and reflection terms where the power emanates from the floquet port itself. With this approach, it is sufficient to simulate only one cell. Ports and lumped ports for wave electromagnetics problems. A powerful application for electrical systems and electromagnetic behavior analysis, ansys hfss 15. George2278, i started using floquet ports new to hfss v11 which give you the advantage of offnormal plane wave illumination, but found that i get subtly different results depending on the floquet port and structure seperation. This paper presents a twodimensional infinite dipole array system with a mushroomlike highimpedance surface his ground plane with wideangle scanning capability in the eplane. Ansys hfss enables pivotal commware engineers to design faster by building a periodic model with a floquet port that can be solved quickly by using the analytic derivatives tool to dial in the desired performance. A guide to floquet port in hfss v11 originally posted by friendchip in my opinion, floquet port is also a kind of feed or excitation. Floquet port excites and terminates waves propagating down the unit cell. A guide to floquet port in hfss v11 originally posted by friendchip. A study of a wideangle scanning phased array based on a high. Floquet port is utilized to simulate the excitation of electromagnetic em wave. Feb 02, 2016 introduction the name hfss stands for high frequency structure simulator.
Scribd is the worlds largest social reading and publishing site. The lumped port can be used to specify an effective impedance between two conductive boundaries within the modeling domain. Cst studio suite 3d em simulation and analysis software. Floquet port with master slave boundaries gives infinite array fss response.
Two coupled oscillators with periodic parametric excitation. Wave port represents the surface through which a signal enters or exits the geometry. Secondly you can download hfss user manual by ansoft or i think. Ansoft hfss setup solution go back contents more index overview representing an electric or magnetic field over a relatively large region is a fairly difficult task. Propagation characteristics of siw modes propagation characteristics of siw as periodic structure are obtained. What is the optimum height of a floquetport over a periodic. Spins gds2hfss is a circuit design utility to convert 2dimensional layout file in gds stream format into.
Solution of optical and microwave problems using hfss. How to simulate finite size 2 unitcell x 2 unit cell fss transmission. In my opinion, floquet port is also a kind of feed or excitation. Ansoft software, and then allows you to download any updates if they are available. Ansoft hfss software is the industry standard for simulating 3d full wave electromagnetic fields. So please if you can share your knowledges on design of siw using hfss. By following the steps in this guide you will learn how to. Floquet theory is widely used in the analysis of stability of dynamical systems, including the mathieu equation and hills differential equation for approximating the motion of the moon. You can also click here to download a copy of this example.
Hfss simulation model t is the period of the absorber, d is the thickness of the ceramic coating, r is the. Right clicking on the excitation and then choosing edit sources, it shows that the magnitude of floquet port 1. 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. I have tried according to getting started with hfss floquet ports manuscript. 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. Heres where you can talk about maxwell, hfss, slwave, etc. Why dont they use another floquet port as an excitation instead of the wave port. Jan 17, 2014 thus, the periodic port reference point on the incoming side port should be the point at the bottom left of the xy plane, when looking down the zaxis and the surface.
How to assign floquet port and masterslave vector direction. The transmission terms from the antenna to the floquet modes will be accurate because the antennas ports are always included in the 3d refinement process. Modedialogbox notethisdialogboxwillappearonlywhileyouassignwaveports. The floquet port is placed at the top of an air box light blue, a master boundary green is shown on the xaxis, and a slave boundary pink is shown at. The analysis of the infinite structure is then accomplished by analyzing a unit cell. Essential questions about using floquet ports in periodic. For a large planarperiodic structure, a floquet port can be used to simplify the simulation. Phase characteristics of subwavelength antenna elements for. Portlumped portfloquet portincident wavevoltage source current source. Hfss floquet ports getting started with hfss floquet. Hfss floquet ports getting started with hfss floquet ports ansys,inc 275technologydrive canonsburg,pa15317 tel 17247463304 fax 17245149494. Techniques for analyzing antenna lattice structures richard remski, matt commens, and john silvestro ansoft corporation wireless and microwave technology conference tutorial session ra2 thursday, april 07, 2005 clearwater, fl. It is strongly recommended to use a download manager if youre downloading large files. Higherorder, hierarchical basis functions iterative solver enhanced port solver floquet ports genetic algorithm to expand optimization choices autoassign capability for terminals.
Hfss assumes that each wave port you define is connected to a semiinfinitely long waveguide that has the same crosssection and material properties as the port. What is the optimum height of a floquet port over a. The definitions of the floquet modes, mesh density, and the distance between floquet port and fss surface affects the accuracy of the corresponding. In an ansoft hfss window, select the menu item file new. In the whole band, the co and crosspolarization reflection coefficients are 0 db. The unit cell of the proposed antenna array consists of a dipole antenna and a fourbyfour his ground. Fields cannot be accurately described with a single polynomial expression that covers the entire problem region. They can then run parametric analyses to finetune and validate the optimized design. Hfss user guide o hfss, desenvolvido pela ansis e utilizado. Its goldstandard accuracy, advanced solver and compute technology have made it an essential tool for engineers designing highfrequency and highspeed electronics components. Example unit cell analysis infinite array analysis of an open ended waveguide with plug array this example is intended to show you how to setup and postprocess an a phased array using unit cell analysis using hfss. The incident plane wave is defined using floquet ports as mentioned above. In my design, the unit cell needs to be infinity extended in only one direction and finite in the other direction. The floquet port is closely related to a wave port in that a set of modes floquet modes rep resents the fields on the port boundary.
Design of a kuband singlelayer broadband circularly polarized. However, keep in mind that the number of modes that are absorbed by the floquet port are determined by. Assign the floquet port to assign the floquet port. By following the steps in this guide you will learn how to perform the from ee ee123 at national taiwan university. Floquet port 12 introduction floquet ports in hfss the floquet port in hfss is used exclusively with planarperiodic structures.
Hfss defines a variety of excitations, including wave. Cst studio suite is a highperformance 3d em analysis software package for designing, analyzing and optimizing electromagnetic em components and systems. Aug 30, 2016 42 page ansys, inc page 43an introduction to hfss. Solution of optical and microwave problems using hfss banks. Can i use a wave guide to study finite size fss hfss waves. Select the menu item hfss excitation assign floquet port.
Hfss floquet ports getting started with hfss floquet ports. What is the optimum height of a floquetport over a. Set solution type select the menu item hfss solution type. I would like to simulate metamaterial unit cell, i have problem about floquet port and masterslave boundary assignment in hfss. Ansoft hfss 3d boundary manager go back contents index sources port wave ports lumped gap sources considerations when defining ports incident wave voltage and current sources magnetic bias port by default, the interface between all 3d objects and the background is a perfect e boundary through which no energy may enter or exit. Floquet analysis as described in the theory chapter. The approach taken by ansoft hfss is to use finite ele. Ansys hfss 15 is a reliable application for electronic devices with support for electromagnetic study and reliable simulation features. Floquet ports in hfss the floquet port in hfss is used exclusively with planarperiodic structures. Internet explorer does not support download resuming, and will not help you out if there is a problem with your download. Hfss simulation of one direction periodic strucutres. New circular polarization selective surface concepts based. Fundamental principles, concepts, and use excitations in hfss in brief there are seven types of excitations in hfss.
Design and analysis of an xband phased array patch antenna core. Chief examples are planar phased arrays and frequency selective surfaces when these may be idealized as infinitely large. Compute the reflection and transmission coefficients of a frequency selection surface. For twodimensional infinite periodic structures in hfss, the slave and master boundaries and floquet port are used. Efficient and accurate simulation of antenna arrays in hfss. Simulation analysis of ansys hfss and cst microwave studio for. Modeling electromagnetic waves and periodic structures. The third method uses the unit cell and floquet ports.
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