R
max
vs RCS (σ)
Full equation
L1 K·σ
1/4
overlay
Max detection range
— km
Radar & target
P
t
(dBW)
90
G
t
(dBi)
30
G
r
(dBi)
30
σ (dBsm)
0
S
min
(dBm)
-110
f (GHz)
3.0
Show L1 K·σ
1/4
overlay
Last change:
—
Δterm =
0.0
dB → ΔR
max
≈
0.0
dB
ΔR
max
≈ Δterm / 4 — the fourth-root "quarter efficiency".