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Log In Sign Up. Richard Ocansey. To meet the miniaturization requirement, the antennas employed in mobile terminals must have their dimensions reduced accordingly. Planar antennas, such as microstrip and printed antennas have the attractive features of low profile, small size, and conformability to mounting hosts and are very promising candidates for satisfying this design consideration.
For this reason, compact, broadband and wideband design technique for planar antennas have been attracted much attention from antenna researchers. Very recently, especially after the yearmany novel planar antenna designs to satisfy specific bandwidth specifications of present day mobile cellular communication systems including the global system for mobile communication GSM; — MHzthe digital communication system DCS; — MHzthe personal communication system PCS; — MHzand the universal mobile telecommunication system UMTS; — MHzhave been developed and published in the open literature.
Planar antennas are also very attractive for applications in communication devices for wireless local area network WLAN systems in the 2. The aim of this tutorial is to show you how to use HFSS to design planar antennas for wireless communications. Therefore, we have chosen four antennas types; dipole antenna, the rectangular patch antenna, probe feed patch antenna and triangular microstrip antenna.
At the end, we will propose some projects. It integrates simulation, visualization, solid modelling, and automation in an easy to learn environment where solutions to your 3D EM problems are quickly and accurate obtained. Thus in this tutorial, a dipole antenna will be constructed and analyzed using the HFSS simulator.
The example will illustrate both the simplicity and power of HFSS through construction and simulation of this antenna structure. The following notes will provide a brief summary of goals. General navigation of software menus, toolbars, and quick keys.
Variable assignment. Overview of commands used to create structures. Proper design and implementation of boundaries. Analysis Setup. Report Creation and options. Click HFSS 9. HFSS 9. Project manager 1 O. Right-Click the project file and select Save As from the sub menu. Due to the nature of this design we will use Driven Modal as the solution type.
Variables also hold many other benefits which will make them necessary for all projects. All dimensions can be quickly changed in one window as opposed to altering each object individually. Add all variables shown below by selecting Add.
Be sure to include units as needed. The final variable table should looks like 5 O. By default the proprieties dialog will appear after you have finished drawing an object. The position and size of objects can be modified from the dialog. Give the name dip1 to this object.Download Ansoft Hfss 1. Crack exe. Name: Ansoft Hfss 1.
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This is the title of your second post.I am simulating a three antenna system at 2. Does the model mesh? Take a look at the 'mesh statistics' tab of the solver profile Right click on 'Results' in the Project Tree Window and then select 'Solution Data'. If your model has less than 2, tetrahedron it should run with that amount of memory. Does it look like any one part of the geometry is using more tets than seems reasonable?
The model completes about 3 adaptive passes but does not converge. However, the second image shows that it uses Is there a way to reduce the mesh on the large airbox without compromising the accuracy of the results?
Are you using the fully detailed human body model with internal tissue structures? What is the cylindrical bore that the human is inside? Is it metal or dieletric? Is it modeled as a 2D sheet or 3D volume? How close are you getting to convergence? Is it possible that others are using the cluster and the full amount of RAM is not available? Would something like this reduce the required resources since I cannot modify the ansys component?
The cylindrical bore is a 2D sheet with layered impedance boundary. The impedance boundary conditions are in the image attached. Please let me know if that accurately reflects what I am trying to model. The delta S after 3 passes is 0. This way you can solve the fields only in the outer shell of the body and use it to calculate the power loss inside the body. If you open the 3D component for editing, you can also split the body at the head and then copy the separate head and body back into the main model.
I would also suggest adding a length-based mesh operation to all your port surfaces, something like mm to help the S-Parameters converge faster. Will a 2-sided layered impedance boundary of some thickness still have the same overall effect on power loss between the central coil and the dipoles s as scaling the body and using a physical shell of the same thickness?
I mostly want to know its effect on the overall S21 between the dipoles so if I cannot calculate the power loss directly, it's okay. Is there a way to edit the components? After you insert the 3D component into the project, right click on it's name in the modeler tree and select 'Edit Definition'.
It will open as a separate project. You can't modify this particular instance since it's tied to the read-only database containing the built-in HFSS 3D Components. Now you can delete the 3D component body model and just use this 'Body' object - which you can now freely modify with whatever Boolean operation, etc you want. You should also be using the 'two-sided' option and enable 'shell elements'.Please contact us if you're having trouble. On the command window of the Software Settings page of your job setup, add the following commands before the Ansys Electronics Desktop command ansysedt that you typically run.
An example is shown below:. In addition to running the analysis, this will create a debug-log directory within the work directory which will contain all the generated logs.Create Horn Antenna Geometry-ANSYS HFSS #1
In order to use your HPC pool license, you need to add the following flag to your command:. ANSYS Electronics has the option to specify the tasks automatically or manually for a distributed batch job. When this variable is set to -1, the tasks will be automatically distributed among the cores. The -auto flag is also used to specify automatic mode.
The command line will look as follows for automatic mode. In this mode, users can specify the total number of cores and number of tasks per node And hence, number of cores per task. Additionally, we need to delete the -auto flag. For example, if we're using 8 cores for a job and we're setting tasks per node as 2, then each task will require 4 cores and this will result in a maximum of two tasks per host.
You can specfify one of the design option types in the placeholder by including the expression within quotes :. The setupname is case insensitive. Add a flag -batchextract to the command line of the batch job followed by the macro file. See example below:. You can specfify one of the design option types in the placeholder by including the expression within quotes : "[ designName ]" - batch solve all setups for design with the name given under the project.Remember Me? HFSS: driven terminal Vs driven modal.
Please, use also examples. Thank you!! Could someone make some examples to show when DT is suitable with respect to DM and viceversa? I'll be grateful. Driven modal is OK for all applications. Originally Posted by akedar. Driven Terminal is easier to set up for all conditions, so unless you really want modal s-parameter data, I suggest you use driven terminal.
Driven Modal for waveguides may give better results for some cases. Originally Posted by myemworld. Hi, You can use both all the time. Similar Threads Driven modal and driven terminal 2. Driven modal or driven terminal solution 5. How to draw an integration line in the HFSS driven modal? HFSS driven modal analysis -- common mode 2. Part and Inventory Search.
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