A range of Double Ridge Calibration Kits has been added to the company’s extensive selection of rectangular waveguide Kits.

The Double Ridge Calibration Kits contain the standards and components required to fully calibrate VNA’s configured for waveguide measurements. Kits are available to suit all models of VNA’s in double ridge waveguide sizes from 3.5 GHz to 40 GHz.

A kit would typically include:

  • Waveguide to Coaxial Adaptors
  • Fixed Terminations
  • Flush Short
  • Offsets
  • Offset Shorts
  • Sliding Termination (optional – depending on analyser type and calibration method)
  • Data disc, hardware and handbook

All the components are supplied in a fitted hardwood case.

ModelWaveguide DesignationFrequency
Range (GHz)
WRD200703WRD200D242.0 to 4.8TRL/LRL
WRD200708WRD200D242.0 to 4.8OOL
WRD350D243.5 to 8.2TRL/LRL
WRD350708WRD350D243.5 to 8.2OOL
WRD580703WRD580D285.8 to 16.0TRL/LRL
WRD580708WRD580D285.8 to 16.0OOL
WRD650703WRD650D286.5 to 18.0TRL/LRL
WRD650708WRD650D286.5 to 18.0OOL
WRD750703WRD750D247.5 to 18.0TRL/LRL
WRD750708WRD750D247.5 to 18.0OOL
WRD180703WRD180C2418.0 to 40.0TRL/LRL
WRD180708WRD180C2418.0 to 40.0OOL

* TRL signifies Thru’ Reflect Line LRL signifies Line Reflect Line OOL signifies Offset Offset Load

Kits in other double ridge waveguide sizes are also available. Details are available upon request.

Double Ridge Components additional to the Flann range

Also NEW to the Flann range of components is a comprehensive selection of other Double Ridge products including special designs to suit customer applications


  • Double Ridge Directional Couplers – including dual and triple designs to customer requirement
  • Double Ridge Waveguide to Coax Adaptors
  • Double Ridge Terminations, Fixed, Sliding & High Power
  • Double Ridge Switches, Manual & Electrically Operated
  • Double Ridge Waveguide Assemblies

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