BNC Connectors for Broadcast and Video Equipment: 50 Ω Interface Covers DC–4 GHz Applications
BNC Female RF Coaxial Connector – Flange Mount – Sipu RF Technology
In broadcast, video transmission, and electronic instrumentation, an RF connector must do more than provide a physical connection. Connector selection also involves impedance, frequency range, VSWR, mounting configuration, mating method, and mechanical durability. The BNC-KFB2 is a four-hole flange-mount BNC female connector designed for 2# semi-rigid or semi-flexible coaxial cable. Its documented applications include radio equipment, analog and digital video signal transmission, electronic instruments, and RF systems.
BNC Connection Requirements in Broadcast and Video Equipment
Broadcast and video equipment may require repeatable connections between equipment interfaces, test points, and signal paths. For applications involving frequent mating and unmating, the BNC interface uses a bayonet-style coupling mechanism for quick connection and disconnection. The product documentation specifically lists radio equipment, analog and digital video transmission, electronic instruments, and RF systems as application areas.
For equipment based on a 50 Ω RF architecture, characteristic impedance is an important selection parameter. The BNC-KFB2 is specified with a 50 Ω characteristic impedance and a DC–4 GHz frequency range, defining its documented electrical operating range.
Consider VSWR and Signal Transmission Parameters
For video and RF signal paths, electrical specifications can provide a more practical basis for connector selection. The BNC-KFB2 has a specified VSWR of ≤1.3 and an insertion loss of ≤0.06√F(GHz) dB. These values can be used by engineers when evaluating connector characteristics across the intended frequency range.
Selecting Flange-Mount BNC Connectors
Mounting configuration is another consideration when selecting a BNC connector. The BNC-KFB2 uses a four-hole flange-mount design and is compatible with 2# semi-rigid or semi-flexible coaxial cable. Its specified durability is 500 mating cycles, providing a defined mechanical reference for applications involving repeated reconnection.
Operating conditions should also be reviewed during selection. The documented temperature range is -55°C to +165°C, while center-conductor contact resistance is ≤2.0 mΩ and outer-conductor contact resistance is ≤0.2 mΩ.
Key BNC Connector Selection Criteria
For broadcast, video transmission, and RF equipment, engineers can first confirm:
- Whether the system uses a 50 Ω impedance architecture;
- Whether the target frequency falls within DC–4 GHz;
- Whether VSWR ≤1.3 is suitable for the application;
- Whether a four-hole flange mount is required;
- Whether frequent mating and unmating is expected;
- Whether the operating temperature falls within -55°C to +165°C.
BNC connector selection should therefore go beyond the connector name itself. Impedance, frequency range, mounting configuration, electrical characteristics, and operating conditions should be considered together when defining the appropriate interface for broadcast and video equipment.
For technical inquiries or custom phase-controlled cable assemblies, please contact our engineering team at info@sipu-rf.com