Rectangular Waveguide Dimensions

Rectangular Waveguide Sizes

Rectangular Waveguide Dimensions

A rectangular waveguide is a hollow conductive metal pipe with a cross section of rectangular shape that guides electromagnetic waves with minimal loss of energy.

The inner dimensions of the waveguide determine the cutoff frequency. The cutoff frequency is the lowest frequency at which the waveguide can operate. In rectangular waveguide, the waveguide width determines the lower cutoff frequency.

The Electronic Industries Alliance (EIA) defined  WR designations for standard rectangular waveguides. The designator for a size consists of the letters WR followed by numerals. The letters “WR” stand for Waveguide Rectangular and the number that follows “WR” is the width of the waveguide opening in mils, divided by 10.

The table below gives the details on the various waveguide sizes and their recommended frequency range.

EIA nameFrequency rangeInner dimensions
WR23000.32GHz – 0.45GHz23in × 11.5in
WR21000.35GHz – 0.50GHz21in × 10.5in
WR18000.45GHz – 0.63GHz18in × 9in
WR15000.50GHz – 0.75GHz15in × 7.5in
WR11500.63GHz – 0.97GHz11.5in × 5.75in
WR9750.75GHz – 1.15GHz9.75in × 4.875in
WR7700.97GHz – 1.45GHz7.7in × 3.85in
WR6501.15GHz – 1.72GHz6.5in × 3.25in
WR5101.45GHz – 2.20GHz5.1in × 2.55in
WR4301.72GHz – 2.60GHz4.3in × 2.15in
WR3402.20GHz – 3.30GHz3.4in × 1.7in
WR2842.60GHz – 3.95GHz2.84in × 1.34in
WR2293.30GHz – 4.90GHz2.29in × 1.145in
WR1873.95GHz – 5.85GHz1.872in × 0.872in
WR1594.90GHz – 7.05GHz1.59in × 0.795in
WR1375.85GHz – 8.20GHz1.372in × 0.622in
WR1127.05GHz – 10GHz1.122in × 0.497in
WR1027.00GHz – 11GHz1.02in × 0.51in
WR908.20GHz – 12.40GHz0.9in × 0.4in
WR7510.00GHz – 15GHz0.75in × 0.375in
WR6212.40GHz – 18GHz0.622in × 0.311in
WR5115.00GHz – 22GHz0.51in × 0.255in
WR4218.00GHz – 26.50GHz0.42in × 0.17in
WR3422.00GHz – 33GHz0.34in × 0.17in
WR2826.50GHz – 40GHz0.28in × 0.14in
WR2233.00GHz – 50GHz0.224in × 0.112in
WR1940.00GHz – 60GHz0.188in × 0.094in
WR1550.00GHz – 75GHz0.148in × 0.074in
WR1260GHz – 90GHz0.122in × 0.061in
WR1075GHz – 110GHz0.1in × 0.05in
WR890GHz – 140GHz0.08in × 0.04in
WR6110GHz – 170GHz0.065in × 0.0325in
WR7110GHz – 170GHz0.065in × 0.0325in
WR5140GHz – 220GHz0.051in × 0.0255in
WR4172GHz – 260GHz0.043in × 0.0215in
WR3220GHz – 330GHz0.034in × 0.017in
WR2325GHz – 500GHz0.020in × 0.010in
WR1.5500GHz – 750GHz0.0150in × 0.0075in
WR1750GHz – 1100GHz0.010in × 0.005in

  June 1, 2021   General

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