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QMA Series RF Connector

QMA Connector

RF Connectors > QMA RF Connectors

Description

The QMA connector is a quick disconnect version of the SMA connector and shares the same internal construction, which allows the connector to have excellent performance. The electrical performance benefits of the QMA include low loss RF performance up to 6 GHz. Because of the innovative coupling mechanism, a 360-degree butt joint is maintained which results in low RF leakage. Since the RF line is identical to the SMA series, the QMA connectors also offer the same high power handling capability. This gives the series significant advantages over other quick disconnect connectors.

Mechanically the QMA series offers a more convenient installation than SMA connectors. Because the interface mates with a snap-on instead of a threaded coupling, there is a significant time advantage. Typically, these connectors can be installed into a system 10 times faster than an SMA connector. Another benefit of eliminating the threaded coupling is the denser packaging. The pitch between connector can be reduced because there is no requirement for wrench clearance. Finally, the connectors can be rotated 360 degrees after they are mated which greatly improves the flexibility of installations.

Features & Benefits

  • Operates at the same electrical performance as SMA up to 6 GHz
  • Snap-on interface for quick and easy installation
  • Rotatable 360° after connection for flexibility with installation

Applications

  • Base Stations
  • Cable Assemblies
  • Amplifiers
QDS Specifications
Impedance 50 Ω
Frequency Range DC - 6 GHz
Return Loss DC - 3 GHz ≥ 32 dB; 3 - 6 GHz ≥ 25 dB
Dielectric Withstanding Voltage 1,000 V rms, 50 Hz at sea level
Working Voltage ≤ 335 V rms, 50 Hz at sea level
Insulator Resistance ≥ 5,000 MΩ
Center Contact Resistance ≤ 3 mΩ
Outer Contact Resistance ≤ 2.5 mΩ
RF Leakage DC - 3 GHz 80 dB minimum, 3 - 6 GHz 70 dB minimum
Engagement Force 5.6 lbs (25 N)
Disengagement Force 4.5 lbs (20 N)
Retention Force for Interface ≥ 13.5 lb (60 N)
Mating Cycles 100
Distance Between Connectors .49 inches (12.4mm) minimum
Body White bronze over brass
Solder Body Gold over brass
Pin Contact Gold over brass
Socket Contact Gold over beryllium copper
Outer Contact White bronze over spring bronze
Insulator PTFE
Crimp Ferrule White bronze over copper
Temperature Range -40°C to +80°C