parabolic.m

来自「Electronic Communication Systems的Matlab源」· M 代码 · 共 37 行

function parabolic(eff,freq,d_min,d_max)
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% Computes and plots the antenna gain over a range of for antenna diameters
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% eff = Efficieny
% freq = frequency in hertz
% d_min = Minimum dish diameter
% d_max = Maximum dish diameter
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% example fucntion call
% parabolic(0.6,4e9,1.8,4)
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% speed of light
c= 3e8;
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d_step=(d_max-d_min)/100;
d=d_min:d_step:d_max;
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% Compute gain in dBi
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Gbi = 10*log10(eff*((pi*freq*d/c).^2));
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clf
figure(1)

plot(d,Gbi);
title('parabolic antenna gain in dBi for various diameters')
ylabel('Gain in dBi')
xlabel('Diameter in metres')
grid
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