H-20 Radar Design Project

STEP 1 OF 5

Operating Frequency

Analyze the RCS curve, then select your radar frequency

👴

Mr. K. Schaller

EW and Survivability Expert

Design Variables — available knobs and cost ranges

R_eff = ⁴√( P_t · G_t² · λ² · σ / (4π)³ · P_r,min )

Knob	Cost Range	Effect on R_eff	Also Controls
FREE Frequency f	$0	λ²·σ product (trade space)	Jammer vulnerability, atm. loss
COST Sensitivity P_r,min	$5K – $750K	∝ (1/P_r,min)^¼	Noise floor, receiver complexity
COST Tx Power P_t	$25K – $12M	∝ P_t^¼	Weight, cooling, prime power
COST Antenna Gain G_t	$5K – $5M	∝ G_t^½ (enters squared)	Aperture size, beamwidth
FREE Pulse Width τ	$0	None — affects δR only	δR = cτ/2 (range resolution)

REQ 1: Detect H-20 at ≥330 km slant range · REQ 2: Resolve two H-20s (δR ≤ 50 km)
Goal: satisfy both requirements at minimum total cost.

H-20 RCS vs Frequency — nose-on (m²) · red bands = active jamming · ∇ = selected frequency

Received Power vs Slant Range · vertical line = 330 km requirement

First Design Review — commit to enter the sandbox

Frequency:

R_eff — km

Radar Parameters

System Status

Wavelength λ—

H-20 σ at freq—

Jammer band—

R_bt (burn-through)N/A

R_eff (detection)—

Max horizon (LOS)391 km ✓

Budget

Total System Cost

—

P_t: —

G_t: —

P_r,min: —

Freq + PW: $0 (free)

Mission Requirements

REQ 1 — Detect H-20 @ 330 km FAIL

R_eff ≥ 330 km → —

REQ 2 — Resolve Two H-20s FAIL

R_eff ≥ 330 km & δR ≤ 50 km
→ — / —

Flyoff Animation (fixed: 50 km sep, 9 km alt)

Speed:

Timeline 400.0 km

Guided Design

H-20 Range: — km

Beam: —°

H-20 Bomber: Nose-On RCS vs Frequency

Intel Brief

H-20 Jammer Configuration

Design Frequency Reference

Parameter	Band 1	Band 2
Freq range	100 MHz – 2.35 GHz	5.1 – 6.1 GHz
P_j (transmit)	100 W	500 W
G_j	10 (10 dBi)	10 (10 dBi)
Detection rule	P_r > P_j,rx (SNR ≥ 1.0)

Frequency	σ (m²)	σ (dBsm)	Status