W28KF-U320R - WR-28 to 2.92mm Female Right Angle Waveguide to Coax Adapter, UBR-320, 26.3-40 GHz

WR-28 to 2.92mm Female Adapter for Professional Ka-Band Applications

This WR-28 waveguide to 2.92 mm female coaxial adapter is designed to ensure a stable, precise and low-loss transition across the 26.3–40 GHz range, covering the full Ka-Band with high performance. It is a professional QAXIAL solution suitable for advanced mmWave systems, measurement equipment, radar front-ends and high-frequency telecom applications.

The 2.92 mm coaxial interface enables reliable connections up to 40 GHz with excellent signal integrity, while the UBR-320 square flange ensures full mechanical compatibility with WR-28 waveguide systems. Internal surface quality, tight tolerances and precise interface alignment help reduce insertion loss and maintain an optimized VSWR across the entire band.

High-Frequency Performance and Reliability

In the Ka-Band, internal geometry control is critical, as even small irregularities can significantly affect RF performance. Each QAXIAL adapter is manufactured with high-precision machining, carefully finished mating surfaces and strict dimensional control, ensuring a stable, repeatable and reliable waveguide-to-coax transition—even for demanding measurement environments.

Thanks to these characteristics, this adapter is suitable for integration into professional RF systems as well as laboratory setups using instrumentation up to 40 GHz and beyond.

Main Features

• WR-28 / Ka-Band 26.3–40 GHz with optimized performance
• 2.92 mm female connector for high-frequency links up to 40 GHz
• UBR-320 square flange compatible with WR-28 standards
• Low insertion loss and optimized VSWR for critical applications
• High-precision mechanical construction with controlled tolerances
• Compatible with mmWave test setups, RF systems and industrial equipment

Applications

• Ka-Band radar systems for imaging, sensing and advanced communications
• RF front-ends for transmit/receive modules in the 26–40 GHz range
• Test and measurement equipment including VNAs up to 40 GHz
• Microwave telecom for high-capacity point-to-point and backhaul links
• Industrial mmWave systems for diagnostics, control and sensing
• Ka-Band component characterization (antennas, filters, active modules, mixers)
• Research and development laboratories in RF/mmWave technologies
• Integration into test benches for RF/microwave device development

Designed for Stability and Professional Use

Operating in the Ka-Band requires extreme attention to internal surface quality, mechanical alignment and structural robustness, as these factors directly impact RF performance. This WR-28 to 2.92 mm adapter is engineered to provide stable and repeatable behavior over time, ensuring reliable operation both in continuous systems and intensive measurement setups.

Its high build quality and compatibility with major mmWave architectures make this adapter an ideal choice for laboratories, system integrators, telecom and radar manufacturers and industrial users requiring professional Ka-Band components.

Dedicated Technical Support

For complex applications or specific integration needs, QAXIAL provides specialized technical support and can evaluate custom configurations or variants on request. The goal is to ensure maximum performance within the user’s system.