Variable Calibrated
Rotary Vane
Attenuators
2.60 to 50.0 GHz
0 to 60 dB
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2.60 to 50.0 GHz
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Calibrated Variable Precision Rotary Vane Attenuators
These direct reading precision units provide
varying attenuation values that depend on mathematical law and are independent of frequency. The effects of
varying temperature and humidity conditions are almost negligible and therefore the stability of the attenuation setting
is assured for full frequency range operation.
A specially designed cylindrical waveguide section contains matched precision metallized attenuating
elements which are rotated to exactly angular positions. Attenuation readout is provided through use of a
precision stainless steel tape mechanism which presents an overall scale length greater than thirty inches.
The size of these units have been minimized by incorporating newly developed waveguide cylindrical sections
and greatly improved transition techniques. Because of the reduced size and short length, as well as the inherent
rugged construction, these units are readily adaptable for special systems applications. Finish is instrument gray
enamel.
General Specifications:
Attenuation Range . . . . . . . . . . . . . 0 to 60.0 dB
VSWR . . . . . . . . . . .... . . . . . . . . . .1.15 maximum
Accuracy:
0 to 50 dB . . . . . . . . . . . +/-2% of dB reading or +/-0.1 dB, whichever is greater
50 to 60 dB . . . . . . . . . . .Usable as reference only
Insertion Loss. . . . . . . . . . . . . . . .1.0 dB maximum (0.5 dB typical)
Important ordering information: Add suffix "R" for panel mounting.
| WG
Size |
Frequency
Range, GHz |
Equivalent
Flange Type |
WG
Mt. |
Avg. Power
Capability Watts |
Model
No. |
Model
No. |
| WR-284 | 2.60 to 3.95 | UG-584/U AL Cover | AL | 15 | 222 | - |
| WR-229 | 3.30 to 4.90 | CMR-229 AL Flat | AL | 15 | 2922 | 2922-R |
| WR-187 | 3.95 to 5.85 | UG-407/U AL Cover | AL | 15 | 322 | 322-R |
| WR-159 | 4.90 to 7.05 | CMR-159 AL Flat | AL | 15 | 5922 | 5922-R |
| WR-137 | 5.85 to 8.20 | UG-344/U BR Cover | BR | 10 | 422 | 422-R |
| WR-112 | 7.05 to 10.0 | UG-138/U AL Cover | AL | 10 | 522 | 522-R |
| WR-102 | 7.00 to 11.0 | WR-102 AL Cover | AL | 10 | 0222 | 0222-R |
| WR-90 | 8.2 to 12.4 | UG-135/U AL Cover | AL | 10 | 622 | 622-R |
| WR-75 | 10.0 to 15.0 | WR75 AL Cover | AL | 10 | 7522 | 7522-R |
| WR-62 | 12.4 to 18.0 | UG-1665/U AL Cover | AL | 5 | 722 | 722-R |
| WR-51 | 15.0 to 22.0 | WR-51 AL Cover | AL | 2 | 5122 | 5122-R |
| WR-42 | 18.0 to 26.5 | UG-597/U AL Cover | AL | 2 | 822 | 822-R |
| WR-28 | 26.5 to 40.0 | UG-599/U-AL Cover | AL | 2 | 1022 | 1022-R |
| WR-22 | 33.0 to 50.0 | WR-22 BR Rd. Cover | BR | 1/2 | 1122 | 1122-R |
| In.
A |
In.
B |
In.
C |
In.
D |
In.
E |
In.
F |
In.
G |
In.
H |
In.
J |
In.
K |
Model
No. |
Model
No. |
| 25.50 | 7.94 | 8.42 | 7.50 | 4.13 | 3.00 | - | - | - | - | 222 | - |
| 27.50 | 7.94 | 8.42 | 7.50 | 4.13 | 3.00 | .63 | 6.25 | 1.38 | 5.94 | 2922 | 2922-R |
| 20.50 | 7.22 | 7.00 | 6.50 | 3.22 | 2.75 | .63 | 5.25 | 1.38 | 3.38 | 322 | 322-R |
| 18.00 | 7.22 | 7.00 | 6.50 | 3.22 | 2.75 | .63 | 5.25 | 1.38 | 3.38 | 5922 | 5922-R |
| 14.88 | 7.22 | 7.00 | 6.50 | 3.22 | 2.75 | .63 | 5.25 | 1.38 | 3.38 | 422 | 422-R |
| 12.00 | 7.22 | 7.00 | 6.50 | 3.22 | 2.75 | .63 | 5.25 | 1.38 | 3.38 | 522 | 522-R |
| 16.94 | 7.22 | 7.00 | 6.50 | 3.22 | 2.75 | .63 | 5.25 | 1.38 | 3.38 | 0222 | 0222-R |
| 11.25 | 6.13 | 5.70 | 6.00 | 2.33 | 2.50 | .63 | 4.75 | 1.27 | 2.38 | 622 | 622-R |
| 9.50 | 6.13 | 5.70 | 6.00 | 2.33 | 2.50 | .63 | 4.75 | 1.27 | 2.38 | 7522 | 7522-R |
| 10.00 | 6.13 | 5.56 | 6.00 | 2.33 | 2.50 | .63 | 4.75 | 1.27 | 2.38 | 722 | 722-R |
| 8.50 | 5.87 | 5.51 | 4.50 | 2.34 | 2.38 | .56 | 3.38 | .77 | 2.88 | 5122 | 5122-R |
| 7.40 | 5.87 | 5.51 | 4.50 | 2.34 | 2.38 | .56 | 3.38 | .77 | 2.88 | 822 | 822-R |
| 7.00 | 5.87 | 5.51 | 4.50 | 2.34 | 2.38 | .56 | 3.38 | .77 | 2.88 | 1022 | 1022-R |
| 6.00 | 5.87 | 5.51 | 4.50 | 2.34 | 2.38 | .56 | 3.38 | .77 | 2.88 | 1122 | 1122-R |
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Please call if you need any further assistance or information. |
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9 |
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P.O. BOX 718, West Caldwell, NJ (973) 808-9113 Fax (973) 808-1524 |
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