?? antgain.m
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% Program 7-11
%
% antgain.m
%
% Programmed by A.Kanazawa
% Checked by H.Harada
%
function gain = antgain(width, back)
theta = [0:359];
gain = zeros(1,360);
if width ~= 360,
n = log10(sqrt(1/2))./log10(cos(width*pi/360)); % the coefficient n
gain(1:89) = 10*log10(cos(theta(1:89)*pi/180).^n); %[dB] Antenna gain
gain(272:360) = 10*log10(cos(theta(272:360)*pi/180).^n); %[dB] Antenna gain
if back ~= 0, %definition of antenna gain for horizontal direction[dB]
gain(90:271) = back; %[dB]
end
end
%************ end of file************
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