Interactive 3D model — auto-rotates, drag to orbit
915 MHz · Δ-phase flat 180° over ~124 % band, Σ↔Δ iso >20 dB over ~92 % (inverter = CPS strip-swap crossover; conventional ring ~25 %) · split −2.6/−3.8 dB · 3D-printed Cu-tape box, cavity mode ≈2.2 GHz · interactive 3D on the detail page (mated cable + solder collars)
⬗ stack-up: FR4 1.6 mm CPS (no ground plane) · 3D print + Cu-tape wrap · WE 60312202114509 SMA ×4