D38999 Coaxial Cable Contacts

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Amphenol Military & Aerospace D38999 Coaxial Cable Contacts enable precise RF and microwave signal transmission within the industry’s most widely used MIL‑DTL‑38999 circular connectors. Each contact provides a controlled‑impedance 50 Ω path, allowing engineers to route high‑frequency channels alongside power or data conductors for compact mixed‑signal architectures.

Technical Features

• Compatible with MIL‑DTL‑38999 Series I–III connector inserts and shell sizes supporting size 8, 12, 16, and 20 coax cavities.
• Precision‑machined components designed for broadband 50 Ω impedance control and low VSWR across microwave frequencies.
• Supports integration of RF, microwave, or even high‑speed digital signals in a single rugged circular connector assembly.
• Available with floating‑mount or spring‑loaded contact designs to maintain impedance alignment under vibration.
• Qualified plating systems such as Durmalon or black zinc‑nickel help ensure corrosion resistance and EMI/RFI continuity.

Design and Integration Guidance

Each coaxial contact pair comprises a precision inner conductor, dielectric, and outer conductor configured to match 50 Ω system impedance. Correct cable‑to‑contact impedance matching and proper contact insertion are essential to maintain return‑loss performance. These contacts are ideal for combining RF paths with power or digital lines in mission‑critical harnesses.

Typical Applications

• Radar and electronic warfare feedlines
• High‑frequency avionics and sensor interconnects
• SATCOM uplink/downlink modules
• Open‑architecture embedded computing systems using mixed‑signal D38999 layouts

Quality and Performance Assurance

All D38999 Coaxial Cable Contacts undergo Amphenol’s coaxial contact frequency validation and dimensional inspection processes to confirm fit and impedance continuity. This rigorous audit structure ensures long‑term reliability and repeatable electrical contact performance critical to defense and aerospace qualification programs.