Rectangular Waveguide Sizes

Rectangular Waveguide Sizes

Rectangular Waveguide Sizes

waveguide Rectangular Waveguide Sizes

A Rectangular Waveguide is an electromagnetic feed line that is used for high frequency signals. Rectangular Waveguide conduct microwave energy has lower insertion loss than coaxial cables.

A Rectangular 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.

 

Rectangular Waveguide Sizes

Waveguide name Recommended frequency Cutoff frequency
lowest order mode
Cutoff frequency
next mode
Inner dimensions of waveguide opening
EIA RCSC * IEC A inch[mm] B inch[mm]
WR2300 WG0.0 R3 0.32 to 0.45 GHz 0.257 GHz 0.513 GHz 23 [584.2] 11.5 [292.1]
WR2100 WG0 R4 0.35 to 0.50 GHz 0.281 GHz 0.562 GHz 21 [533.4] 10.5 [266.7]
WR1800 WG1 R5 0.45 to 0.63 GHz 0.328 GHz 0.656 GHz 18 [457.2] 9 [228.6]
WR1500 WG2 R6 0.50 to 0.75 GHz 0.393 GHz 0.787 GHz 15 [381] 7.5 [190.5]
WR1150 WG3 R8 0.63 to 0.97 GHz 0.513 GHz 1.026 GHz 11.5 [292.1] 5.75 [146.05]
WR975 WG4 R9 0.75 to 1.15 GHz 0.605 GHz 1.211 GHz 9.75 [247.65] 4.875 [123.825]
WR770 WG5 R12 0.97 to 1.45 GHz 0.766 GHz 1.533 GHz 7.7 [195.58] 3.85 [97.79]
WR650 WG6 R14 1.15 to 1.72 GHz 0.908 GHz 1.816 GHz 6.5 [165.1] 3.25 [82.55]
WR510 WG7 R18 1.45 to 2.20 GHz 1.157 GHz 2.314 GHz 5.1 [129.54] 2.55 [64.77]
WR430 WG8 R22 1.72 to 2.60 GHz 1.372 GHz 2.745 GHz 4.3 [109.22] 2.15 [54.61]
WG9 2.20 to 3.30 GHz 1.686 GHz 3.372 GHz 3.5 [88.9] 1.75 [44.45]
WR340 WG9A R26 2.20 to 3.30 GHz 1.736 GHz 3.471 GHz 3.4 [86.36] 1.7 [43.18]
WR284 WG10 R32 2.60 to 3.95 GHz 2.078 GHz 4.156 GHz 2.84 [72.136] 1.34 [34.036]
WG11 3.30 to 4.90 GHz 2.488 GHz 4.976 GHz 2.372 [60.2488] 1.122 [28.4988]
WR229 WG11A R40 3.30 to 4.90 GHz 2.577 GHz 5.154 GHz 2.29 [58.166] 1.145 [29.083]
WR187 WG12 R48 3.95 to 5.85 GHz 3.153 GHz 6.305 GHz 1.872 [47.5488] 0.872 [22.1488]
WR159 WG13 R58 4.90 to 7.05 GHz 3.712 GHz 7.423 GHz 1.59 [40.386] 0.795 [20.193]
WR137 WG14 R70 5.85 to 8.20 GHz 4.301 GHz 8.603 GHz 1.372 [34.8488] 0.622 [15.7988
WR112 WG15 R84 7.05 to 10 GHz 5.26 GHz 10.52 GHz 1.122 [28.4988] 0.497 [12.6238]
WR102 7.00 to 11 GHz 5.786 GHz 11.571 GHz 1.02 [25.908] 0.51 [12.954]
WR90 WG16 R100 8.20 to 12.40 GHz 6.557 GHz 13.114 GHz 0.9 [22.86] 0.4 [10.16]
WR75 WG17 R120 10.00 to 15 GHz 7.869 GHz 15.737 GHz 0.75 [19.05] 0.375 [9.525]
WR62 WG18 R140 12.40 to 18 GHz 9.488 GHz 18.976 GHz 0.622 [15.7988] 0.311 [7.8994]
WR51 WG19 R180 15.00 to 22 GHz 11.572 GHz 23.143 GHz 0.51 [12.954] 0.255 [6.477]
WR42 WG20 R220 18.00 to 26.50 GHz 14.051 GHz 28.102 GHz 0.42 [10.668] 0.17 [4.318]
WR34 WG21 R260 22.00 to 33 GHz 17.357 GHz 34.715 GHz 0.34 [8.636] 0.17 [4.318]
WR28 WG22 R320 26.50 to 40 GHz 21.077 GHz 42.154 GHz 0.28 [7.112] 0.14 [3.556]
WR22 WG23 R400 33.00 to 50 GHz 26.346 GHz 52.692 GHz 0.224 [5.6896] 0.112 [2.8448]
WR19 WG24 R500 40.00 to 60 GHz 31.391 GHz 62.782 GHz 0.188 [4.7752] 0.094 [2.3876]
WR15 WG25 R620 50.00 to 75 GHz 39.875 GHz 79.75 GHz 0.148 [3.7592] 0.074 [1.8796]
WR12 WG26 R740 60 to 90 GHz 48.373 GHz 96.746 GHz 0.122 [3.0988] 0.061 [1.5494]
WR10 WG27 R900 75 to 110 GHz 59.015 GHz 118.03 GHz 0.1 [2.54] 0.05 [1.27]
WR8 WG28 R1200 90 to 140 GHz 73.768 GHz 147.536 GHz 0.08 [2.032] 0.04 [1.016]
WR6 WG29 R1400 110 to 170 GHz 90.791 GHz 181.583 GHz 0.065 [1.651] 0.0325 [0.8255]
WR7 WG29 R1400 110 to 170 GHz 90.791 GHz 181.583 GHz 0.065 [1.651] 0.0325 [0.8255]
WR5 WG30 R1800 140 to 220 GHz 115.714 GHz 231.429 GHz 0.051 [1.2954] 0.0255 [0.6477]
WR4 WG31 R2200 172 to 260 GHz 137.243 GHz 274.485 GHz 0.043 [1.0922] 0.0215 [0.5461]
WR3 WG32 R2600 220 to 330 GHz 173.571 GHz 347.143 GHz 0.034 [0.8636] 0.017 [0.4318]

Note:

  • The “WR” designation stands for Rectangular Waveguides
  • The Number that follows “WR” is the width of the waveguide opening in mils, divided by 10. For Example WR-650 means a waveguide whose cross section width is 6500 mils.
  • The waveguide width determines the lower cutoff frequency and is equal (ideally) to ½ wavelength of the lower cutoff frequency.