Salisbury Screen Radar Absorber Calculator
Stealth engineering & electromagnetic absorption: Model resonant Salisbury screen quarter-wave spacers ($d = \lambda / 4$), return loss ($\text{RL}$ in dB), surface impedance matching, and $-10\text{ dB}$ absorption bandwidth.
Radar Frequency & Incidence
X-band radar = 8–12 GHz
0° = Normal incidence
Resistive Sheet & Dielectric Spacer
Nominal free space η_0 = 376.73 Ω
Honeycomb ~1.05, Foam ~1.1, PTFE ~2.1
Dielectric loss within spacer layer
Absorption & Reflection Output
Optimal Spacer Thickness d:
--
mm (quarter-wave λ/4)
Resonant Return Loss (RL):
--
dB reduction (absorption)
-10 dB Bandwidth (90% Power Abs):
--
GHz (% fractional bandwidth)
Power Absorption Fraction:
--
% incident power dissipated
| Free Space Wavelength λ_0: | -- |
| Dielectric Wavelength λ_d: | -- |
| Input Impedance at Resonance Z_in: | -- |
| Voltage Reflection Coefficient |Γ|: | -- |
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