Interactive 3D model — auto-rotates, drag to orbit
Statistical resolution limit (SRL) — closest two targets tellable apart vs SNR · hover a point (session 014z DF model)
The full DF front-end as SIMULATED, end to end: CNC-loop Σ/Δ pair (0.73λ, shared reflector) with the user's MIST6002000 coupler — 50×50×1 DSPSL rat-race with via-swap 180° inverter, extracted from the uploaded CST STEP — 200 mm below the antenna plane, fed by build-faithful RG316 pigtails (exits at the elements' solder pass-drills, EQUAL lengths via auto-sized service jog, 13 mm bend radius, in-plane perpendicular entry at the diagonal A/NE & B/SW pads) · COUPLER validated as-drawn (0.1 mm-mesh openEMS): at 915 on FR4 4.3 RL −20.5/−21.5 dB, split imbalance 0.27 dB, phase error 1.5°/1.6°, Σ↔Δ isolation −39 dB; laminate fit εr 3.90→4.65 leaves balance/phase/iso FLAT (topology-set) — build on ordinary 1.0 mm FR4; radiation efficiency −36.5 dB (self-shielding DSPSL: direct pickup ≈44 dB below the antenna path bare, unmeasurable boxed) · INSTALL patterns (MUR): pair alone Σ 11.5 dBi / F/B 13.0 / Δ null 41.5 dB → with cables 34.3 → + bare coupler 31.3 (Σ F/B 7.3 — the horizontal runs act as a weak back-reflector) → full boxed install 28.9 dB null, Σ tilt +8° (calibrate or pre-tilt); every build ≥14 dB above the −15 dB DF background floor · BOX SIZING for movability (4 sizes × 4 positions): the 60×60×30 coupler-only box wins every column (Σ tilt −6…0° wherever it sits, vs −12…+14° for the 95×95×41.5 rev-B) — fix the big box or shrink it to move it · plane-wave ingress: sealed gland = zero in all orientations; snug unbonded hole −67 dB vs antenna worst-case; worst pol = E along cable · interactive 3D below (toggle pair / coupler / cables / box)
⬗ stack-up: FR4 2 mm CNC pair (one cut part) · MIST6002000 DSPSL coupler 50×50×1 on FR4 1.0 · RG316 equal-length routes · rev-B wrapped box (or 60×60×30 coupler-only) · openEMS on Modal