|
Equation:
Pr = ( Pp x G x δ) / (4 x pi
x r2) |
|
Pr
= reflected power (Watt) |
|
G
= antenna gain (figure not dB) |
|
Pp
= RF peak power (Watt) |
|
δ
= target Radar Cross Section (RCS m2) |
|
r
= target range (m) |
|
|
| Example: Pp
= 1000 Watt |
|
G
= 1000 (30 dB) |
|
δ
= 1 m2 |
|
r
= 100 000 m (100km) |
|
Pp G
δ pi r |
|
Pr
= (1000 x 1000 x 1) / (4 x pi x
1000002)
= |
(1000
x 1000 x 1) / (12.57 x 10 000 000) =
0.00795775 Watt or
- 20.99 dBW
|