Single-piece gamma-matched Yagi

10.1 dBi · F/B 21.7 dB · S11 −22.9 dB · direct coax, no balun · F/worst-3D-lobe 12.1 dB

⬗ stack-up: single-piece machined metal · free-space (no substrate)

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Statistical resolution limit (SRL) — closest two targets tellable apart vs SNR · hover a point (session 014z DF model)

051015510152025−5 dB bg · harsh−15 dB bg · nominalSNR 5 dB (bg −5 dB) → SRL 15.7° (≈ 27.5 m apart @ 100 m)15.7°SNR 10 dB (bg −10 dB) → SRL 9.5° (≈ 16.7 m apart @ 100 m)SNR 15 dB (bg −15 dB) → SRL 5.5° (≈ 9.7 m apart @ 100 m)5.5°SNR 20 dB (bg −20 dB) → SRL 4.2° (≈ 7.4 m apart @ 100 m)SNR 25 dB (bg −25 dB) → SRL 1.2° (≈ 2.2 m apart @ 100 m)SNR = signal − background (dB) · background = −SNRSRL — resolvable separation (°)Statistical resolution limit — two unresolved targets (beam HPBW 56°)real full-wave az beam · sequential-lobing Δ · GLRT 1-vs-2 · CFAR 5% · 5 dB interferer · 014z model
gamma_yagi.json