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I agree with BigBoss, however notice that you will lose any parameters that you may have added in CST. If you want to have a parametric model, the only way is to draw again the model.
ICARA is one free educational software for analyzing reflectors.
**broken link removed**
Since it is an academic software is more limited than GRASP. However, you can use file-defined feed patterns and it works quite well.
You will need to parse the CST file conveniently so it can be read by...
I would use the adaptive meshing for the first time and check the S11 responses for each mesh. CST would simulate and automatically detect the right mesh size.
Since the antenna is not very narrowband and covers from 5.4 to 5.85Ghz, I wouldn't expect dramatic degradations in return loss and pattern when moving to 5.85-5.925 GHz.
I think it is very likely that the antenna system will work.
Harys,
Meandering is a miniaturization technique.
The length of an antenna is related to its operating frequency. For example, the length of a patch antenna is half a wavelength. Meandering consist on folding the antenna several times to fit the same antenna length in an smaller volume.
The...
These antennas are usually of PIFA architecture (Planar Inverted F-Antenna).
The length of the antenna is a quarter-wavelength. At GSM-900 that means about 8cm.
Aditionally these antennas are folded to occupy less space (see the figure attached). By combining multiple foldings and metallic...
The golden rule for a patch antenna is length equal to half-a-wavelength.
The most commom method to compute theoretically the patch parameters is the cavity method. You can find the details and formulas in Balanis book, "Antenna theory and design".
I hope this helps.
A rectangular patch as an UWB?? Typically, things with corners do not work well as UWB antennas. UWB antennas are usually very smooth.
Additionally, the plot you are presenting is not a patch antenna, it is a printed monopole antenna. And by looking at the U-shape slot, does not seem UWB.
You forgot to add a "." to compute the element-by-element division.
That's a very common mistake. Even if you know, it is very easy to forget.
Use
E=(sin(n*s/2))./(n*sin(s/2));
Instead of
E=(sin(n*s/2))/(n*sin(s/2));
Because by breaking the symmetry of the patch antenna, you excite an orthogonal mode. By properly adjusting the dimensions you can have the two modes with equal amplitude and a phase difference of 90º. Therefore, you get circular polarization.
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