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. Ansoft high frequency structure simulator tutorial the dipole antenna april 2004. I have found in some tutorials the i need to use eigenmode, but i could not get the expected result. Microwave electronics lab analysis and design of lefthanded metamaterial lenses using ansoft hfss anthony lai1, kevin m. Global material database the global material database is the primary material database used throughout all maxwell software. Describe the use of data flow diagrams produce a data flow diagram from a given case study including different levels distinguish between the. I have got the complete dispersion diagram of my unitcell structure but i am unable to add the line of light to it which is very important in order to correctly figure out the frequency band gap. Four propagation directions are shown where 90 and 0 are the principal axes of the impedance tensor. A tutorial for drawing dispersion diagram of ebg structures. Data flow diagram tutorial after completion of study of.
The dispersion of light in a vacuum is shown as a black dashed line. Design and analysis of microsrtip square patch antenna under the kind guidance of. Layout driven assembly in ansys electronics desktop the ansys electronics desktop aedt is an integrated environment with an easytouse interface that provides a streamlined workflow between ansys em field solvers, circuit system simulators, ecad links and mcad connector models. Rectangular waveguide hfss r objective getting started with hfss a tutorial using hfss, simulate an airfilled wr90 waveguide shown above. Agilent basics of measuring the dielectric properties of. Before building antennas, people can use these softwares to help them for finding the results they want. The standard deviation can easily be manipulated and can be bias.
The circuited and hfss simulated sparameters of the onecell are presented in figure 2 for comparison. How can i plot a dispersion diagram of high impedance surfaces using hfss. Second, the correct dispersion diagram computation in the selected fullwave. Optimetrics permits postprocessing of any hfsscomputed quantity as either a parametric sweep output. Good practice guide for atmospheric dispersion modelling prepared by the national institute of water and atmospheric research, aurora pacific limited and earth tech incorporated for the ministry for the environment. Introduction in this tutorial, a dipole antenna will be constructed and analyzed using the hfss simulation software by ansoft. It consists of a square patch, a via, and a square block of substrate as shown in fig. By amy gander dispersion diagrams a graph where the data sets can be placed in one column with the variable on the vertical axes of the graph examples disadvantages works better with lots of data.
In many cases, the dispersion diagram is not the only parameter desired from analysis of a pbg structure. Stopband prediction with dispersion diagram for electromagnetic. Modelling of optical waveguide using comsol multiphysics 1action nechibvute, 2courage mudzingwa, 1,2physics department, midlands state university, pbag 9055, gweru, zimbabwe abstract in this paper we investigate by simulation the dependence of. Design of an orthomode transducer in gap waveguide technology ali imran sandhu c ali imran sandhu,2010 examinar. Band gaps occur in frequency intervals, where no dispersion curves in the slowwave region are present. Training and tutorial material are available for both a broad range of ansys products and users experience. I wonder if altair have any such model model or tutorial with procedure outlined for such an application. The plots show results for a patch, b mushroom, and c ringmushroom unit cells. In this case, a highfrequency structure simulator hfss is commonly used. Since the sievenpiper structure is open to air in the positive zdirection, an airbox has to be defined for the simulation.
Next, the unitcell of the sievenpiper mushroom structure has to be drawn in hfss. Cst microwave studio 8 mtalab code for plotting the dispersion diagram for publishing all of your plot result, especially in ieee publications, we should import our data into matlab environment, as a perfect engineering tool to sketch various plots in a unique plot in a high resolution view. The gaussian plume model is a standard approach for studying the transport of airborne contaminants due to turbulent di. Copper unless otherwise specified if it is different, repeat step 8 for each material. Rf module supports loss tangents and dispersion models drudelorentz, and debye dispersion r r d e d d e p d e hh h h 0 0 0 j ve. Ec 4th year shivanshu awasthi ec 4th year sarvesh kumar nishad ec 4th year. David grayson edited this page apr 19, 2016 15 revisions. Can anyone provide the formula for it and explain the procedure to do it.
There are lots of different types of antennas in the world. This tutorial covers how to use master slave boundary conditions of hfss to simulate fss in terahertz region. Can anybody please give references for drawing dispersion diagram in hfss. Design of an orthomode transducer in gap waveguide. Getting started with hfss v9 for antenna design october, 2003 this getting started training material is intended for new users of hfss. The following notes will provide a brief summary of goals.
The dispersion diagram is shown in figure 2d, from which it can be concluded that the proposed structure has a. Examples of standard deviation this tutorial covers some examples of standard deviation using all methods which are. Modelling of optical waveguide using comsol multiphysics. Dispersion diagram for an ideal tensor impedance surface. To obtain the field patterns, intrinsic impedance and wavelength for the first 4 modes. First we must configure hfss to use its eigenmode solver. Good practice guide for atmospheric dispersion modelling. A dispersion diagram is a plot of propagation constant versus frequency. For the study of dispersion, we need some measures which show whether the dispersion is small or large. Ansoft high frequency structure simulator ansoft hfss is discussed. Can any can tell how to make a dispersion diagram in hfss.
The example will illustrate both the simplicity and power of hfss through construction and simulation of this antenna structure. The objective is to provide a very thorough introduction to hfss as applied to antenna design, which may be followed stepbystep in hfss with the investment of only a few hours of time. For te 20 mode a full sine wave is observed and for te 11 mode field intensity maximum at the center zero at the boundary. The loss tangent tan d is called tan delta, tangent loss or. Dispersion diagram of a unit cell of a periodic structure. D denotes dissipation factor and q is quality factor. Techniques for analyzing antenna lattice structures. How can i plot a dispersion diagram of high impedance. Hfss tutorial courserepsecen452spring2016 wiki github.
How can i plot a dispersion diagram of high impedance surfaces. It is mainly used to find the surface wave bandgap. You can also find hfss tutorials regarding this diagram. How to get line of light in dispersion diagram in hfss. This tutorial was intended to introduce the user to the basic commands and. In this tutorial, the dispersion diagram of a parallel plate waveguide dielectric substrate permittivity of 10. Cst microwave studio waves, dispersion curves are calculated only in the region under the light line, as shown in fig. Ansoft hfss material manager go back contents index material database the material database consists of a group of predefined materials that may be assigned to individual objects in a model. Analysis must include first three modes te10, te20, te01 3. Hi, anybody knows how to get line of light in the dispersion diagram in hfss. In any case, the dispersion diagram of the periodic structure can be. Loss tangent vector diagram the loss tangent or tan d is defined as the ratio of the imaginary part of the dielectric constant to the real part. Again, ansoft hfss and optimetrics together provide a unique set of capabilities for more extensive evaluation of this class of problems. Ebg structures by extending a wellknown dispersiondiagram analysis of.
I am trying to introduce to my students on how feko is used to simulate the dispersion diagram of the wellknown unit mushroom cell developed by sievenpipper as reported in fig. General navigation of software menus, toolbars, and quick keys. Probe feed patch antenna2 probe feed patch antenna getting started click the microsoft start button, select all programsansofthfss 12hfss 12 or double click on the hfss 12 icon on the windows desktop adding a project and design to insert a design into an open project. Measures of dispersion although the range is easy to compute it is a crude measure of variability. In hfss desktop, click the on the standard toolbar, or select the menu item file new. It can be seen from figure 3 that the structure can be used as bandstop. Hfss from ansoft and cst microwave studio are very popular computer softwares that are used for antenna models design. In this tutorial, the dispersion diagram of a lefthanded sievenpiper mushroom structure is generated using hfsss eigenmode solver.
Consider the following two sets of data which have the same mean, 25, and the same range, 10, but obvious di erences in the pattern of variability. Unit cell simulation using master and slave boundary. How to draw dispersion diagram in hfss researchgate. To analyse periodic structure i need a dispersion diagram. The mean of the number of sales of cars over a 3 month period is 87, and the standard deviation is 5. Rectangular waveguide characterization using hfss 58 figure3. By selecting the values of an ebg structure dimensions a stopband from x to y ghz will be achieved. You can even use a linked hfss simulation as the source.
Contribute to courserepsecen452 spring2016 development by creating an account on github. Hfss eigenmode dispersion diagram sievenpiper mushroom tutorial. Set solution type select the menu item hfss solution type. It also covers how to change the angle of incidence with the help of floquet ports. On the computation of the dispersion diagram of symmetric. We want to use hfss to obtain a dispersion diagram for the first mode for a parallel plate waveguide. Basics of measuring the dielectric properties of materials application note.
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