Electronic Countermeasures (ECM) - MATLAB Simulations for Radar Systems Design - page 478

T J
T e

 

ϒ = 10.0 × log 1 + -----

(10.22)

 

Consequently, the RRF is

–
40

ϒ

------

RRF = 10

(10.23)

MATLAB Function Ðrange_red_factor.mÑ

The function Ðrange_red_factor.mÑ implements Eqs. (10.22) and (10.23); it
is given in Listing 10.5 in Section 10.5. This function generates plots of RRF
versus: (1) the radar operating frequency; (2) radar to jammer range; and (3)
jammer power. Its syntax is as follows:

[RRF] = range_red_factor (te, pj, gj, g, freq, bj, rangej, lossj)

where

Symbol Description Units Status

te radar effective temperature K input

pj jammer peak power W input

gj jammer antenna gain dB input

g radar antenna gain on jammer dB input

freq radar operating frequency Hz input

bj jammer bandwidth Hz input

rangej radar to jammer range Km input

lossj jammer losses dB input

The following values were used to produce Figs. 10.5 through 10.7.

Symbol Va l u e

te 500 kelvin

pj 500 KW

gj 3 dB

g 45 dB

freq 10 GHz

bj 10 MHZ

rangej 750 Km

lossj 1 dB