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Compute Gain for 699-1 Antenna

This SatLab plot shows a gain analysis for the ITU699-1 antenna.

The script to generate this plot is shown below.

Figure 1: Antenna gain plot for ITU 699-1 antenna.
Script
  1. function demoAntenna
  2. %
  3. %      This demo computes and displays the antenna gain of
  4. %      the ITU699-1 antenna, Required for the analysis of
  5. %      inteference into ground based microwave systems
  6. %
  7.  
  8. D       = 2.76; % [m]
  9. lambda  = 0.12; % [m] corresponding to f=2.5 GHz
  10. Gmax    = 33;   % [dB]
  11. i = 1;
  12. G = 1;
  13. x = [0:.2:2.82.82763.29833.5:.5:90];
  14.  
  15. for phi=x,
  16.   G(i) = ITU699_1(phi, D, lambda, Gmax);
  17.   i    = i+1;
  18. endfor
  19.  
  20. Aeff = exp10((G +10*log10(lambda^2/(4*pi)))/10);
  21. erase
  22.  
  23. plot(x, Aeff, 'logy,grid')
  24. title('ITU 699-1: D=2.76m, l=0.12m, Gmax=33',
  25.       '                 l  g     l      lll')
  26. ylabel('Effective Antenna Area (m223)',
  27.        ' llllllll  llllll lll slx xs')
  28. xlabel('f (deg)',
  29.        'g sllls')