Amphenol CDI Adapters & Terminations

Overview
Amphenol Military & Aerospace’s CDI division produces high‑precision RF and microwave adapters and terminations engineered for defense and aerospace systems operating through the mmWave frequency range to 110 GHz. Each adapter maintains a controlled 50 Ω impedance for signal integrity across SMA, SMP, SMPM, SMPS, 2.92 mm (K), 1.85 mm, and 1.0 mm series interfaces.

Product Capabilities

• In‑series and between‑series adapters support precise coaxial transitions for mixed‑diameter RF lines.
• Fixed terminations offer 50 Ω absorption for calibration, instrumentation, and system stability in broadband chains.
• Hermetic and ruggedized variants address aerospace, naral, and environmentally sealed applications where vibration and thermal stress must be controlled.
• Low‑VSWR design ensures minimal signal reflection and broadband instrumentation accuracy to 110 GHz.

Mechanical and Material Considerations
CDI adapters and terminations are machined using aerospace‑grade materials with precision tolerances for repeatable performance. Typical plating options include nickel, gold, and RoHS‑compliant alternatives such as Durmalon and black zinc‑nickel for corrosion protection in harsh environments.

Integration and Applications
These products are used across radar, electronic warfare, SATCOM, test equipment, and SOSA/OpenVPX modules. They provide the critical inter‑series link or terminal load necessary for maintaining system impedance in board‑mount and cable assemblies. Integration with Amphenol ConvergeRF cable assemblies extends low‑loss performance through matched VSWR transitions and mixed‑diameter lines.

Selection Notes
Engineers select Amphenol CDI adapters and terminations when a fully qualified defense‑grade mechanical fit and broadband frequency continuity are required. They complement CDI and SV Microwave connector families and simplify system‑level integration where signal integrity and environmental ruggedness cannot be compromised.