# How to modify the response of a antenna element with respect to different opearting frequency in the specified frequency range?

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mage bryan 2024 年 4 月 3 日

Take the phased.IsotropoicAntennaElement as an example. 'FrequencyRange' is set between 1GHz and 2GHz. Under the default cofiguration, the response of the antenna in the specified 'FrequencyRange' is a constant of one. I wonder how can I change the respose with respect to different frequency.
antenna = phased.IsotropicAntennaElement('FrequencyRange',[1e9 2e9]);
fc = 1e9*(1:0.1:2);
resp = antenna(fc,[0;0])
resp = 1x11
1 1 1 1 1 1 1 1 1 1 1
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Manikanta Aditya 2024 年 4 月 3 日
If you want to change the frequency response of the antenna, you would need to use a different type of antenna object that allows for this kind of customization. For example, you could use the 'phased.CustomAntennaElement' object, which allows you to specify a custom frequency response.
% Define the frequency range
fc = 1e9*(1:0.1:2);
% Define a custom frequency response function
myresp = @(f) (f - 1e9) / 1e9; % Linear response from 0 at 1GHz to 1 at 2GHz
% Create a custom antenna element with the custom frequency response
antenna = phased.CustomAntennaElement('FrequencyVector', fc, 'FrequencyResponse', myresp(fc));
% Compute the response at the frequencies of interest
resp = antenna(fc,[0;0]);

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### 回答 (1 件)

Honglei Chen 2024 年 5 月 10 日
As Manikanta mentioned in the comment, you can set up a phased.CustomAntennaElement to specify a pattern that is not constant across the freqeuncy. Isotropic antenna is an ideal case so there is no variation in pattern across the frequency range.
Hope this helps,

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