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Re: Inverted F antenna - short circuit line
I suggest that you see this link, its really well explained.
https://www.antenna-theory.com/antennas/patches/pifa.php
Usually the best solution frequency is the maximum frequency of the frequency sweep which is in your case 20 GHz. HFSS meshes the design according to the solution frequency and then uses this same mesh at all the other frequencies. If you choose for example 7 GHz, lambda will be bigger than at...
Hello, i suggest that you change the coordinate system of the helix. You can make a new one by a rotation of 90° of the global coordinate system and you can change the origin to the position you need. This way your helix will move with the relative coordinate system.
In fact you can deduce Ecross and Eco from Etheta and Ephi, u can find the equations by following this link [URL="http://cp.literature.agilent.com/litweb/pdf/ads2008/emds/ads2008/Radiation_Patterns_and_Antenna_Characteristics.html#RadiationPatternsandAntennaCharacteristics-1105213"]
Take alpha =...
Re: how to know polarisation of antenna in hfss?
I suggest that you use plot field vector_E over a certain surface away from your antenna and animate it , this way you can see the direction of E in function of the phase and deduce the polarization.
You r welcome, to plot the x and y components you should use the fields calculator (right click on Field overlays to open it), follow these steps to get the X component :1. Select E from quantity
2. Select Phase from function
3. Select AtPhase from complex
4. Select Scalar X from scal
5. Add it...
Hello neffi,
Select the circular face at the tip of the coax and assign a waveport, the integration line should be from the center core to the metallic shield. For more information look in this user guide:http://anlage.umd.edu/HFSSv10UserGuide.pdf there's an example about probe feed antenna
Hello, in fact the reflection and transmission coefficients doesn't change with the interface location, they only depend on the frequency and the characteristics of the two mediums (permittivity, conductivity and permeability). You can refer to "microwave engineering" M.Pozar p 29
If you have a certain value of impedance that you must meet, for example 50 ohms, define your lumped ports impedance as = 50 ohms and change your line dimension to have S11 closest to the center of the smith chart. when your S11 real part is too close to 1 and its im is too close to zero that...
For transmission line structures entirely enclosed in metal, port size is merely the waveguide interior carrying the guided fields, so its over the inner dimension.
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