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160 Passaic Ave Fairfield NJ 973-808-9113
Variable Calibrated
Rotary Vane
Attenuators

2.60 to 50.0 GHz
0 to 60 dB

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Short length and rugged construction. Also available with panel mounting holes.

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

Please call if you need any further assistance or information.

9

 160 Passaic Ave Fairfield NJ 973-808-9113

 P.O. BOX 718, West Caldwell, NJ (973) 808-9113 Fax (973) 808-1524

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