Microwave Waveguide Sizes & Dimensions

Microwave Waveguide Sizes

Microwave Waveguide
Microwave Waveguide

Due to high frequencies used, Waveguides rather than RF coaxial cables are used to connect Microwave Radios, Antennas and Couplers.  Matched and correct size and dimension of Waveguide is essential for all items in the Microwave link.

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.

Rectangular, Circular and Double Rigid

Geometrically speaking there are three types of waveguides – Rectangular Waveguides, Double Rigid Waveguides and Circular Waveguides. The tables below will give you details on the various waveguide sizes and their properties.

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]
WR4284 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.

Double-ridge waveguides are rectangular wagevuides with two ridges protruding parallel to the short wall. This increases the E-Field in the waveguide improving performance.

Double Ridge Waveguide Sizes

Designation
(a)=aluminum, (b)=brass, (c)=copper, (s)=silver
fL – fU*
(GHz)
fCO**
(GHz)
Inside
Width
(in)
Inside
Height
(in)
WR U.S. Mil.
__ /U
British
Mil.
IEC
WR975 RG204 (a) 0.75-1.12 0.605 9.750 4.875
WR770 RG205 (a) 0.96-1.45 0.766 7.700 3.850
WR650 RG69 (b)
RG103 (a)
WG6 1.12-1.70 0.908 6.500 3.250
WR510 1.45-2.20 1.157 5.100 2.550
WR430 RG104 (b)
RG105 (a)
WG8 1.70-2.60 1.372 4.300 2.150
WR340  RG112 (b)
RG113 (a)
WG9A 2.20-3.30 1.736 3.400 1.700
WR284 RG48 (b)
RG75 (a)
WG10 2.60-3.95 2.078 2.840 1.340
WR229  RG340 (c)
RG341 (a)
WG11A R40 3.30-4.90 2.577 2.290 1.145
WR187 RG49 (b)
RG95 (a)
WG12 R48 3.95-5.85- 3.152 1.872 0.872
WR159  RG343 (c)
RG344 (a)
WG13 R58 4.90-7.05 3.712 1.590 0.795
WR137 RG50 (b)
RG106 (a)
WG14 R70 5.850-8.200 4.301 1.372 0.622
WR112 RG51 (b)
RG68 (a)
WG15 R84 7.050-10.000 5.260 1.122 0.497
WR90 RG52 (b)
RG67 (a)
WG16 R100 8.20-12.40 6.56 0.900 0.400
WR75  RG346 (c)
RG347 (a)
WG17 10.0-15.0 7.87 0.750 0.375
WR62 RG91 (b)
RG349 (a)
WG18 12.40-18.00 9.49 0.622 0.311
WR51  RG352 (c)
RG351 (a)
WG19 15.00-22.00 11.6 0.510 0.255
WR42 RG53 (b)
RG121 (a)
WG20 18.00-26.5 14.1 0.420 0.170
WR34 RG354 (c) 20.0-33.0 17.4 0.340 0.170
WR28 RG96 (s)
RG271 (c)
WG22 26.50-40.00 21.1 0.280 0.140
WR22 RG97 (s) WG23 33.00-50.00 26.4 0.224 0.112
WR19 WG24 40.00-60.00 31.4 0.188 0.0940
WR15 RG98 (s) WG25 50.00-75.00 39.9 0.148 0.0740
WR12 RG99 (s) WG26 60.00-90.00 48.4 0.122 0.0610
WR10 WG27 75.00-110.0 59.0 0.100 0.0500
WR8 RG138 (s) WG28 90.00-140.0 73.8 0.0800 0.0400
WR7 RG136 (s) 110.0-170.0 90.8 0.0650 0.0325
WR4 RG137 170.0-260.0 137 0.0430 0.0215
WR3 RG139 (s) 220.0-325.0 174 0.0340 0.0170

 

Circular Waveguide Sizes

FrequencyBand Frequency Range Circular WaveguideDiameter, Inches (mm) Cover Flange (Brass)MIL-F- 3922 UG Flange Type
X LOW 8.2-9.97 1.094 (27.79) 53-001 UG-39/U Square
MID 8.5-11.6 0.938 (23.83)
HIGH 9.97-12.4 0.797 (20.24)
Ku LOW 12.4-15.9 0.688 (17.48) 53-005 UG-1666/U Square
MID 13.4-18.0 0.594 (15.08)
HIGH 15.9-18.0 0.500 (12.70)
K LOW 17.5-20.5 0.455 (11.56) 54-001 UG-595/U Square
MID 20-24.5 0.396 (10.06)
HIGH 24-26.5 0.328 (8.33)
Ka LOW 26.5-33 0.315 (8.00) 54-003 UG-595/U Square
MID 33-38.5 0.250 (6.35)
HIGH 38.5-40 0.219 (5.56)
Q LOW 33-38.5 0.250 (6.35) 67B-006 UG-383/U Round
MID 38.5-43 0.219 (5.56)
HIGH 43-50 0.188 (4.78)
U LOW 40-43 0.210 (5.33) 67B-007 UG-383/U-M Round
MID 43-50 0.188 (4.78)
HIGH 50-60 0.165 (4.19)
V LOW 50-58 0.165 (4.19) 67B-008 UG-385/U Round
MID 58-68 0.141 (3.58)
HIGH 68-75 0.125 (3.18)
E LOW 60-66 0.136 (3.45) 67B-009 UG-387/U Round
MID 66-82 0.125 (3.18)
HIGH 82-90 0.094 (2.39)
W LOW 75-88 0.112 (2.84) 67B-010 UG-387/U-M Round
HIGH 88-110 0.094 (2.39)
F LOW 90-115 0.089 (2.26) -UG-387/U-M Round
HIGH 115-140 0.075 (1.91)
D LOW 110-140 0.073 (1.85) -UG-387/U-M Round
HIGH 140-160 0.059 (1.50)
G LOW 140-180 0.058 (1.47) -UG-387/U-M Round
HIGH 180-220 0.045 (1.14)
170-260 0.049 (1.25) -UG-387/U-M Round
220-325 0.039 (0.99) -UG-387/U-M Round

 

WR3 | WG32 | R2600 Waveguide

WR3 | WG32 | R2600 Waveguide Sizes

WR3 | WG32 | R2600 Rectangular Waveguide Size

  • EIA Standard (WR):WR3
  • RSCS Standard (British Military):WG32
  • IEC Standard:R2600

WR3 Specifications

  • Recommended Frequency Band:220 to 330 GHz
  • Cutoff Frequency of Lowest Order Mode:173.571 GHz
  • Cutoff Frequency of Upper Mode:347.143 GHz
  • Dimension:0.034 Inches [0.8636 mm] x 0.017 Inches [0.4318 mm]

 

Microwave Waveguide WR3
Microwave Waveguide

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.

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WR4 | WG31 | R2200 Waveguide

WR4 | WG31 | R2200 – Rectangular Waveguide Size

WR4 | WG31 | R2200 Waveguide Size

  • EIA Standard:WR4
  • RSCS Standard (British Military):WG31
  • IEC Standard:R2200

WR4 Specifications

  • Recommended Frequency Band:172 to 260 GHz
  • Cutoff Frequency of Lowest Order Mode:137.243 GHz
  • Cutoff Frequency of Upper Mode:274.485 GHz
  • Dimension:0.043 Inches [1.0922 mm] x 0.0215 Inches [0.5461 mm]

 

Microwave Waveguide WR2300
Microwave Waveguide

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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WR5 | WG30 | R1800 Waveguide

WR5 | WG30 | R1800 – Rectangular Waveguide Size

WR5 | WG30 | R1800 Waveguide Size

  • EIA Standard:WR5
  • RSCS Standard (British Military):WG30
  • IEC Standard:R1800

WR5 Specifications

  • Recommended Frequency Band:140 to 220 GHz
  • Cutoff Frequency of Lowest Order Mode:115.714 GHz
  • Cutoff Frequency of Upper Mode:231.429 GHz
  • Dimension:0.051 Inches [1.2954 mm] x 0.0255 Inches [0.6477 mm]

 

Microwave Waveguide WR2300
Microwave Waveguide

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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WR6 | WG29 | R1400 Waveguide

WR6 | WG29 | R1400 – Rectangular Waveguide Size

WR6 | WG29 | R1400 Waveguide Size

  • EIA Standard:WR6
  • RSCS Standard (British Military):WG29
  • IEC Standard:R1400

WR6 Specifications

  • Recommended Frequency Band:110 to 170 GHz
  • Cutoff Frequency of Lowest Order Mode:90.791 GHz
  • Cutoff Frequency of Upper Mode:181.583 GHz
  • Dimension:0.065 Inches [1.651 mm] x 0.0325 Inches [0.8255 mm]

 

Microwave Waveguide WR2300
Microwave Waveguide

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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WR8 | WG28 | R1200 Waveguide

WR8 | WG28 | R1200 Rectangular Waveguide Size

WR8 | WG28 | R1200 Waveguide Size

  • EIA Standard (British Military):WR8
  • RSCS Standard:WG28
  • IEC Standard:R1200

WR8 Specifications

  • Recommended Frequency Band:90 to 140 GHz
  • Cutoff Frequency of Lowest Order Mode:73.768 GHz
  • Cutoff Frequency of Upper Mode:147.536 GHz
  • Dimension:0.08 Inches [2.032 mm] x 0.04 Inches [1.016 mm]

 

Microwave Waveguide WR2300
Microwave Waveguide

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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WR10 | WG27 | R900 Waveguide

WR10 | WG27 | R900 – Rectangular Waveguide Size

WR10 | WG27 | R900 Waveguide Size

  • EIA Standard:WR10
  • RSCS Standard (British Military):WG27
  • IEC Standard:R900

WR10 Specifications

  • Recommended Frequency Band:75 to 110 GHz
  • Cutoff Frequency of Lowest Order Mode:59.015 GHz
  • Cutoff Frequency of Upper Mode:118.03 GHz
  • Dimension:0.1 Inches [2.54 mm] x 0.05 Inches [1.27 mm]

Commonly Used for Millimeter Wave (MMW) Link Bands

  • E-Band (71-76GHz and 81-86GHz): 70GHz, 80GHz
Microwave Waveguide WR10
Microwave Waveguide

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

For More Information on Microwave Planning, Please Contact Us

WR12 | WG26 | R740 Waveguide

WR12 | WG26 | R740 – Rectangular Waveguide Size

WR12 | WG26 | R740 Waveguide Size

  • EIA Standard:WR12
  • RSCS Standard (British Military):WG26
  • IEC Standard:R740

WR12 Specifications

  • Recommended Frequency Band:60 to 90 GHz
  • Cutoff Frequency of Lowest Order Mode:48.373 GHz
  • Cutoff Frequency of Upper Mode:96.746 GHz
  • Dimension:0.122 Inches [3.0988 mm] x 0.061 Inches [1.5494 mm]
Microwave Waveguide WR12
Microwave Waveguide

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

For More Information on Microwave Planning, Please Contact Us

WR15 | WG25 | R620 Waveguide

WR15 | WG25 | R620 – Rectangular Waveguide Size

WR15 | WG25 | R620 Waveguide Size

  • EIA Standard:WR15
  • RSCS Standard (British Military):WG25
  • IEC Standard:R620

WR15 Specifications

  • Recommended Frequency Band:50.00 to 75 GHz
  • Cutoff Frequency of Lowest Order Mode:39.875 GHz
  • Cutoff Frequency of Upper Mode:79.75 GHz
  • Dimension:0.148 Inches [3.7592 mm] x 0.074 Inches [1.8796 mm]

Commonly Used for Millimeter Wave (MMW) Link Bands

  • V-Band (58GHz to 64GHz): 58GHz, 60GHz
Microwave Waveguide WR2300
Microwave Waveguide

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

For More Information on Microwave Planning, Please Contact Us

WR19 | WG24 | R500 Waveguide

WR19 | WG24 | R500 – Rectangular Waveguide Size

WR19 | WG24 | R500 Waveguide Size

  • EIA Standard:WR19
  • RSCS Standard (British Military):WG24
  • IEC Standard:R500

WR19 Specifications

  • Recommended Frequency Band:40.00 to 60 GHz
  • Cutoff Frequency of Lowest Order Mode:31.391 GHz
  • Cutoff Frequency of Upper Mode:62.782 GHz
  • Dimension:0.188 Inches [4.7752 mm] x 0.094 Inches [2.3876 mm]

 

Microwave Waveguide WR19
Microwave Waveguide

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

For More Information on Microwave Planning, Please Contact Us