WR42 | WG20 | R220 Waveguide

WR42 | WG20 | R220 – Rectangular Waveguide Size

WR42 | WG20 | R220 Waveguide Size

  • EIA Standard:WR42
  • RSCS Standard (British Military):WG20
  • IEC Standard:R220

WR42 Specifications

  • Recommended Frequency Band:18.00 to 26.50 GHz
  • Cutoff Frequency of Lowest Order Mode:14.051 GHz
  • Cutoff Frequency of Upper Mode:28.102 GHz
  • Dimension:0.42 Inches [10.668 mm] x 0.17 Inches [4.318 mm]

Commonly Used for Microwave Link Bands

  • 18GHz
  • 23GHz
  • 26GHz
Microwave Waveguide WR42
Microwave Waveguide

Other Names:

UBR220, PBR220

These are  different flange types.  U = Unpressurised, P = Pressurised

What is a Waveguide?

A waveguide is an electromagnetic feed line that is used for high frequency signals. Waveguides conduct microwave energy at lower loss than coaxial cables and are used in microwave communications, radars and other high frequency applications.

The waveguide must have a certain minimum cross section, relative to the wavelength of the signal to function properly. If wavelength of the signal is too long (Frequency is too low) when compared to the cross section of the waveguide, the electromagnetic fields cannot propagate. The lowest frequency range at which a waveguide will operate is where the cross section is large enough to fit one complete wavelength of the signal.

For Further Information

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