Moxon rectangle on FR4 (retuned gap) 6.0 dBi D · 5.2 dBi realized (η 82%) · F/B ~12 dB — FR4 loss caps the deep null · direct 50Ω (47−j5, S11 −24 dB) · gap widened to 8.8 mm · 39×94 mm · choke balun
⬗ stack-up: FR4 1.6 mm (εr 4.3) · 1 oz Cu (35 µm) · single top layer
← all designs
Statistical resolution limit (SRL) — closest two targets tellable apart vs SNR · hover a point (session 014z DF model) 0 5 10 15 20 25 5 10 15 20 25 −5 dB bg · harsh −15 dB bg · nominal SNR 5 dB (bg −5 dB) → SRL 22.6° (≈ 40.0 m apart @ 100 m) 22.6° SNR 10 dB (bg −10 dB) → SRL 14.7° (≈ 25.8 m apart @ 100 m) SNR 15 dB (bg −15 dB) → SRL 9.0° (≈ 15.7 m apart @ 100 m) 9.0° SNR 20 dB (bg −20 dB) → SRL 5.3° (≈ 9.3 m apart @ 100 m) SNR 25 dB (bg −25 dB) → SRL 4.0° (≈ 6.9 m apart @ 100 m) SNR = signal − background (dB) · background = −SNR SRL — resolvable separation (°) Statistical resolution limit — two unresolved targets (beam HPBW 80°) moxon full-wave beam (FR4 twin) · sequential-lobing Δ · GLRT 1-vs-2 · CFAR 5% · 5 dB interferer · 014z model 
