Diameter of Waveguide
| Frequency Cutoff
|
1.27 cm (.5 in)
| 13.8 GHz
|
1.91 cm (.75 in)
| 9.2 GHz
|
2.54 cm (1 in)
| 6.9 GHz
|
3.175 cm (1.25 in)
| 5.5 GHz
|
3.81 cm (1.5 in)
| 4.6 GHz
|
4.08 cm (2 in)
| 3.5 GHz
|
6.35 cm (2.5 in)
| 2.8 GHz
|
7.62 cm (3 in)
| 2.3 GHz
|
For circular waveguides:
fc = c/3.412r
where:
fc = cutoff frequency
c = speed of light, 1.181 x 1010 in/s
r = radius of circular waveguide in inches
General Rule of Thumb:
For circular waveguides, make sure the waveguide length is at least four times the diameter.
Waveguide Feed-through Part Number
|
With Dielectric Option Part Number
|
Nominal Pipe I.D. |
Length
|
Installation Hole Size
|
551060
| 551084
| 1.27 cm (.5 in)
| 15.24 cm (6 in)
| 2.22 cm ( .875 in)
|
551061
| 551085
| 1.91 cm (.75 in)
| 15.24 cm (6 in)
| 2.86 cm ( .125 in)
|
551062
| 551086
| 2.54 cm (1 in)
| 15.24 cm (6 in)
| 3.49 cm (1.375 in)
|
551063
| 551087
| 3.175 cm (1.25 in)
| 15.24 cm (6 in)
| 4.46 cm (1.75 in)
|
551064
| 551088
| 3.81 cm (1.5 in)
| 15.24 cm (6 in)
| 4.92 cm (1.9375 in)
|
551065
| 551089
| 4.08 cm (2 in)
| 20.32 cm (8 in)
| 6.35 cm (2.5 in)
|
551066
| 551090
| 6.35 cm (2.5 in)
| 20.32 cm (8 in)
| 7.30 cm (2.875 in)
|
551067
| 551083
| 7.62 cm (3 in)
| 30.48 cm (12 in)
| 9.21 cm (3.625 in)
|
551068
| 551091
| 8.16 cm (4 in)
| 40.64 cm (16 in)
| 11.75 cm (4.625 in)
|
For circular waveguides:
fc = c/3.412r
where:
fc = cutoff frequency
c = speed of light, 1.181 x 1010 in/s
r = radius of circular waveguide in inches
General Rule of Thumb:
For circular waveguides, make sure the waveguide length is at least four times the diameter.