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Antenna calculation
Posted 2025年3月2日 GMT+8 17:11 Version 6.3 1 Reply
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Hello, I would like to ask for some advice. I am currently using the Electromagnetic Waves, Frequency Domain (RF Module) to build an antenna, with frequency ranges set to 0.7 GHz - 4.9 GHz and 0.7 GHz - 5.1 GHz, and a step size of 0.5 for both. In these two frequency ranges, the calculated results for the S11 parameter and voltage standing wave ratio (VSWR) can only be computed up to 4.7 GHz. Additionally, the resonant points calculated in both frequency ranges are the same, and the values corresponding to each resonant point are also identical. Could you please tell me what might be causing this? Is it only possible to compute up to 4.7 GHz, or is it an issue with my designed model? Thank you very much!
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It would seem to me that this is simply due to your choice of step size. These are the values you will get, for either 0.7 to 4.9 or 0.7 to 5.1, in 0.5 sized steps: 0.7, 1.2, 1.7, 2.2, 2.7, 3.2, 3.7, 4.2, and 4.7.
As you can see, the next frequency value in that list would have been 5.2 GHz, but that is greater than both 4.9 and 5.1, so your last step was at 4.7 .
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