blob: bd4dabfed75366da6eca51b22cc4e05524ecd57a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
// chapter 7 example 8
//-----------------------------------------------------------------------------
clc;
clear;
// given data
a_l = 6; // Azimuth length in m
n_a = 0.7; // Azimuth length efficiency
n_e = 0.5; // elevation length efficiency
e_l = 4; // elevation length in m
w = 6; // width of antenna
h = 4; // height of antenna
lamda = 3*10^-2; // wavelength
// Calculations
Eff_A_l = a_l*n_a; // effective azimuth length
Eff_E_l = e_l*n_e; // effective elevation length
A = w*h // actual area
n = n_a*n_e; // aperture efficiency
Ae = A*n; // effective aperture
Az_BW = lamda/Eff_A_l // Azimuth beam width
E_BW = lamda/Eff_E_l // elevation beam width
Az_BW_d = Az_BW*180/%pi // rad to deg conv
E_BW_d = E_BW*180/%pi; // rad to deg conv
G = (4*%pi*Ae)/(lamda^2); //Gain
G_dB = 10*log10(G); // gain in dB
// Output
mprintf('Azimuth Beamwidth = %3.2f degrees\n Elevation Beamwidth = %3.2f degrees\n Gain = %3.1f dB',Az_BW_d,E_BW_d,G_dB);
//-------------------------------------------------------------------------------
|
