diff options
| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /3773/CH21/EX21.7 | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '3773/CH21/EX21.7')
| -rw-r--r-- | 3773/CH21/EX21.7/Ex21_7.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3773/CH21/EX21.7/Ex21_7.sce b/3773/CH21/EX21.7/Ex21_7.sce new file mode 100644 index 000000000..1c1a93ca0 --- /dev/null +++ b/3773/CH21/EX21.7/Ex21_7.sce @@ -0,0 +1,22 @@ +//Chapter 21: Antenna Measurements +//Example 21-5.2 +clc; + +//Variable Initialization +f = 1.4e9 //Frequency (Hz) +Tant = 687 //Increase in antenna temperature (K) +phy_ap = 2210 //Physical aperture (m^2) +S = 1590 //Flux density of Cygnus A (Jy) +k = 1.38e-23 //Boltzmann's constant (J/k) +c = 3e8 //Speed of light (m/s) + +//Calculations +wave_lt = c/f //Wavelength (m) +gain = (8*%pi*k*Tant)/(S*(10**-26)*wave_lt**2) //Gain(unitless) +gain_db = 10*log10(gain) //Gain (dBi) +Ae = gain*wave_lt**2/(4*%pi) //Effective area (m^2) +eff_ap = Ae/phy_ap //Aperture efficiency (unitless) + +//Result +mprintf("The gain of the antenna is %d dBi", gain_db) +mprintf("\nThe aperture efficiency is %.2f or %.1f percent",eff_ap,eff_ap*100) |