blob: f2333885822ebe8b9923138186fc90b596918197 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
//clear//
//Caption:Program to find the output power and attenuation coefficient
//Example11.4
//page349
clear;
clc;
close;
z = 20; //distance in meters
Pz_P0_dB = -2; //fraction of power drop in dB
Pz_P0 = 10^(Pz_P0_dB/10);
disp(Pz_P0,'Fraction of input power reaches output P(z)/P(0)=')
P0_mid_dB = -1; //fraction of power drop at midpoint in dB
P0_mid = 10^(P0_mid_dB/10);
disp(P0_mid,'Fraction of the input power reaches the midpoint P(10)/P(0)=')
alpha = -Pz_P0_dB/(8.69*z);
disp(alpha,'attenuation in Np/m alpha=')
//Result
//Fraction of input power reaches output P(z)/P(0)=
// 0.6309573
//Fraction of the input power reaches the midpoint P(10)/P(0)=
// 0.7943282
//attenuation in Np/m alpha=
// 0.0115075
|
