How to connect a Balun to an antenna object?

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Adrian Salt
Adrian Salt 2023-2-3
回答： Dr. JANAK TRIVEDI 2023-2-3
***Please Help - I am really struggleing with this***
My goal is create an RF network in MATLAB using the antenna and RF toolboxes where I already have a 2:1 balun that has been fully characterized as a Touchstone file.
I also have designed a loop antenna using the Antenna Toolbox and have produced successful S11 Return Loss graphs of the antenna by itself.
I need to find a way to connect the s-object (i.e. the balun) to the feed point of the antenna, and then re-run the simulation to get new S11 charts. Can anyone tell me how to do this with some brief code example? Many thanks!
P.S I am quite new to the antenna and RF toolboxes.

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Dr. JANAK TRIVEDI
To connect the s-object (i.e. the balun) to the feed point of the antenna, you can use the rfckt.series function in MATLAB. Here is an example code:
% Load the balun s-parameter file
balun = rfdata.Touchstone('Balun.s2p');
% Load the antenna
object
antenna = load('LoopAntenna.mat');
% Connect the balun and the antenna using rfckt.
series
circuit = rfckt.series(balun, antenna.loop);
% Analyze the circuit
for the S-parameters
s_params = sparameters(circuit);
% Plot the S11 parameter
rfplot(s_params, 'S11');

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