Waveguide Feed-through (Pipe Penetrations)
Key Features
- Accommodate Requirements Such as Fire Suppression Systems, Hydraulics, and other Utilities
- Honeycomb Waveguide Insert Option Available for High Frequency or Gaseous Applications
- Dielectric Unions are Available to Maintain Isolation to the Ground
ETS-Lindgren's Waveguide Feed-throughs are available in most sizes for water, gas, or air. Specially designed waveguide feed-through assemblies are used for transporting non-conductive gases or liquids into an enclosure.
Specifications
Physical Specifications
|
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.
Electrical Specifications
| 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 |
| 8.16 cm (4 in) | 1.7 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.