BMA Cable Assemblies

You will find BMA assemblies in phased‑array radars, airborne telemetry links, satellite payloads, secure military radios, and 5G millimeter‑wave test fixtures. Engineers choose them because the blind‑mate bayonet tolerates misalignment during quick equipment swaps, the compact housing fits tight RF line‑replaceable units, and the rugged construction withstands vibration, temperature cycling, and high‑G shock. These characteristics make BMA the connector of choice whenever mission‑critical uptime and rapid maintenance matter.

Start by matching your frequency band—our assemblies are qualified from DC to 18 GHz, with low‑loss variants extending to 26.5 GHz. Next, confirm the required impedance (always 50 Ω for BMA) and choose a cable type that balances insertion loss against flexibility, such as RG‑405 for tight bends or low‑density PTFE dielectric for extreme phase stability. Finally, specify environmental ratings (IP‑seal, vibration, temperature) and plating options like passivated stainless or gold to meet corrosion or outgassing requirements.

Handle all blind‑mate connections with gentle axial pressure—never twist the bayonet interface. Keep coupling surfaces clean with lint‑free swabs and isopropyl alcohol, inspecting regularly for debris that can raise contact resistance. Route cables with generous bend radii (≥ five times the diameter) and secure them with strain‑relief clamps to minimize flex during vibration. Periodic visual checks for pin recession, housing damage, or dielectric discoloration help detect wear before it degrades signal integrity.

Our standard series delivers ≤0.05 dB insertion loss per connector at 10 GHz and VSWR ≤1.15:1 through 18 GHz, while the low‑loss line tightens that to ≤0.03 dB and VSWR ≤1.10:1. Shielding effectiveness exceeds 90 dB, maintaining EMI immunity even in crowded racks. Stainless‑steel bodies endure 500 mating cycles, 1,000‑hour salt‑spray, and −55 °C to +165 °C operation, ensuring consistent amplitude, phase, and PIM performance across your system’s full thermal and mechanical envelope.