Introduction to EIA Flange Connectors

EIA (Electronic Industries Alliance) flange connectors are standardized RF interfaces widely used in high-frequency applications. These connectors employ a flanged mechanical design to achieve low-loss interconnection between coaxial cables and equipment, with compliance derived from MIL-STD-348 specifications. Key features include stable impedance (typically 50Ω/75Ω), high shielding effectiveness (>90dB), and broad bandwidth (DC to 40GHz+), making them critical components in microwave communications and radar systems.

Core Structure and Technical Specifications

1.Mechanical Design

• Flange Plate: Aluminum alloy/stainless steel construction with bolt-fastened axial compression for hermetic sealing
• Contact Pins: Gold-plated beryllium copper spring contacts with <5mΩ resistance
• Insulator: PTFE dielectric support (ε=2.1±0.05)

2.Performance Metrics

ParameterTypical ValueVSWR≤1.15@18GHzInsertion Loss0.3dB/m@6GHzTemperature Range-55℃~+125℃

Typical Applications

• 5G Base Stations: Blind-mate connections between RRUs and antenna arrays
• Satellite Comms: Phase-stable waveguide transitions
• Test Equipment: Calibration reference planes for VNAs

Selection Guidelines

Prioritize derivatives like SMA or N-type connectors, noting thread specifications (e.g., 1/4-36 UNEF) and gender compatibility. Recent IEC 61169-6 revisions mandate ≥3μm plating thickness for IP67-rated variants.