blob: ea16d455bca40fc2cb8ef0d73c370f78cc834529 (
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
|
//Chapter-9 example 6
//=============================================================================
clc;
clear;
//input data
F = 9*10^9;//radar operating frequency in hz
Vo = 3*10^8;//velocity of EM wave in m/s
NNBW = 5;//Null to Null beamwidth
Da = 5;//diameter of antenna in m
//Calculations
lamda = Vo/F;//wavelength
A = (%pi*Da*Da)/4;//actural area of antenna
Ac = 0.65*A;//Capture Area
D = 6.4*(Da/lamda)^2;//directivity of antenna
D1 = 10*log10(D)//gain in dB
HPBW = 70*(lamda/Da);//half power beamwidth in deg
NNBW = 2*HPBW;//null to null beamwidth
//Output
mprintf('HPBW of parabolic reflector is %g degrees\n NNBW of parabolic reflector is %g degrees\n Directivity is %g dB\n Capture area is %g m^2',HPBW,NNBW,D1,Ac);
//=============end of the program==============================================
|
