blob: 7a6a493fcd22dced96ba5c40fe320db46f3e5051 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
//Chapter 5: Point Source and Their Arrays
//Example 5-6.6
clc;
//Variable Initialization
lobes = [0.25,0.37,0.46,0.12,0.07] //Normalized power of lobes (unitless)
//Calculation
ohm_a = 0 //Beam area (sr)
sum_lobes = 0 //Sum of all lobes (unitless)
for i=lobes
ohm_a =ohm_a + 2*%pi*(%pi/36)*(i)
sum_lobes =sum_lobes + i
end
D = 4*%pi/ohm_a //Directivity (unitless)
D_db = 10*log10(D) //Directivity (in dBi)
e_m = lobes(1)/sum_lobes //Beam efficiency (unitless)
//Result
mprintf("The directivity is %d or %.1f dBi",D,D_db)
mprintf("\nThe beam efficiency is %.1f",e_m)
|
