RF Waveguide Termination, WR-28, UBR-320, 5 W, 26.3-40.0 GHz (Ka Band)

DLW28-U320-5 is a WR-28 RF waveguide termination designed for operation from 26.3 to 40.0 GHz, with 5 W average input power at 25°C. It is intended to absorb RF power on unused ports, line ends, and secondary branches in microwave and millimeter-wave assemblies, helping reduce reflections and maintain controlled RF behavior.

This termination features an IEC UBR-320 flange and is manufactured in copper with a grey painted finish. That construction makes it suitable for compact RF systems where mechanical accuracy and consistent waveguide interfacing are important.

Key features

• Waveguide size: WR-28 (R320)
• Frequency range: 26.3-40.0 GHz
• Average power: 5 W @ 25°C
• Max VSWR: 1.05
• Flange type: IEC UBR-320
• Material: copper
• Finish: grey painted
• Net weight: approx. 20 g
• Operating temperature: -40°C to +70°C

Role in the RF chain

A 5 W WR-28 waveguide termination is typically used to terminate unused ports, test ports, and auxiliary branches in RF modules, subsystems, and laboratory setups. Good matching helps minimize return reflections and supports more stable RF performance across the signal path.

Why choose this WR-28 termination

• Compatible with WR-28 waveguide systems
• Standard UBR-320 mechanical interface
• 5 W average power handling
• 1.05 max VSWR for excellent match quality
• Compact format with approx. 20 g net weight

DLW28-U320-5 is a strong fit for technical B2B catalogs when a compact WR-28 waveguide termination is needed for RF absorption across 26.3 to 40.0 GHz.