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Flann Precision Rotary Vane Attenuators are considered by many to represent the ‘Industry Standard’ in precision waveguide attenuators, offering high accuracy and unsurpassed repeatability and reliability.
The Rotary Vane Attenuator is the ideal instrument for use in waveguide systems where broadband direct reading of attenuation is required, particularly as a standard for reflectometer and swept systems.
The Flann Rotary Vane Attenuator consists of a rotating circular waveguide section flanked by a pair of low VSWR rectangular to circular transitions. The three waveguide sections are fitted with stable high attenuation elements which ensure close agreement of the attenuation characteristic to the theoretical law. The attenuation is directly related to the relative angular position of the attenuating element in the centre section (Ø) and can be seen to follow the law 40 log (sec Ø).
Key Features |
1% accuracy |
0 dB – 60 dB |
Direct Reading |
Unsurpassed Reliability |
2.60 GHz to 500 GHz |
Applications |
Instrumentation |
Calibration |
Specifications | ||||||||||||||
Precision Rotary Vane Attenuators | ||||||||||||||
Model | Frequency Range (GHz) | Waveguide (WG) | Waveguide (WM) | Waveguide (R) | Waveguide (WR) | VSWR (better than) | Maximum Insertion Loss (dB) | Maximum Power (Watts) | Dimensions (mm) A | Dimensions (mm) B | Dimensions (mm) C | Dimensions (mm) D | Dimensions (mm) E | Weight (kg) |
10110 | 2.60 - 3.95 | 10 | - | 32 | 284 | 1.15 | 0.25 | 12 | 935 | 358 | 198 | 88.2* | 108 | 28 |
11A110 | 3.22 - 4.90 | 11A | - | 40 | 229 | 1.15 | 0.25 | 10 | 687 | 358 | 198 | 81.2* | 108 | 13 |
12110 | 3.94 - 5.99 | 12 | - | 48 | 187 | 1.15 | 0.25 | 10 | 560 | 244 | 149 | 66/75 | 58 | 8.5 |
13110 | 4.64 - 7.05 | 13 | - | 58 | 159 | 1.15 | 0.25 | 9 | 520 | 244 | 149 | 66/75 | 58 | 8 |
14110 | 5.38 - 8.18 | 14 | - | 70 | 137 | 1.15 | 0.25 | 8 | 420 | 244 | 149 | 66/75 | 58 | 6 |
15110 | 6.58 - 10.0 | 15 | - | 84 | 112 | 1.15 | 0.25 | 6 | 340 | 226 | 119 | 45/54 | 44 | 4 |
16110 | 8.20 - 12.5 | 16 | - | 100 | 90 | 1.15 | 0.25 | 4 | 300 | 226 | 119 | 45/54 | 44 | 3.8 |
17110 | 9.84 - 15.0 | 17 | - | 120 | 75 | 1.15 | 0.25 | 3 | 276 | 226 | 119 | 45/54 | 44 | 3.8 |
18110 | 11.9 - 18.0 | 18 | - | 140 | 62 | 1.15 | 0.3 | 2 | 250 | 226 | 119 | 45/54 | 44 | 3.4 |
19110 | 14.5 - 22.0 | 19 | - | 180 | 51 | 1.15 | 0.4 | 1.5 | 250 | 226 | 119 | 45/54 | 44 | 3.4 |
20110 | 17.6 - 26.7 | 20 | - | 220 | 42 | 1.15 | 0.6 | 1 | 250 | 226 | 119 | 45/54 | 44 | 3.3 |
21110 | 21.7 - 33.0 | 21 | - | 260 | 34 | 1.15 | 0.8 | 0.75 | 225 | 226 | 119 | 45/54 | 44 | 3.2 |
22110 | 26.4 - 40.1 | 22 | - | 320 | 28 | 1.15 | 0.9 | 0.5 | 174 | 227 | 119 | 55/64 | 36 | 2.6 |
23110 | 33.0 - 50.1 | 23 | - | 400 | 22 | 1.15 | 1 | 0.3 | 140 | 227 | 119 | 55/64 | 36 | 2.6 |
24110 | 39.3 - 59.7 | 24 | - | 500 | 19 | 1.15 | 1 | 0.25 | 134 | 227 | 119 | 55/64 | 36 | 2.6 |
25110 | 49.9 - 75.8 | 25 | - | 620 | 15 | 1.15 | 1 | 0.15 | 100 | 227 | 119 | 55/64 | 36 | 2.5 |
26110 | 60.5 - 92.0 | 26 | - | 740 | 12 | 1.15 | 1.3 | 0.1 | 89 | 227 | 119 | 55/64 | 36 | 2.5 |
27110 | 73.8 -112.0 | 27 | - | 900 | 10 | 1.15 | 1.5 | 0.07 | 89 | 227 | 119 | 55/64 | 36 | 2.5 |
28110 | 92.3 - 140 | 28 | - | 1200 | 8 | 1.2 | 1.8 | 0.05 | 89 | 227 | 119 | 55/64 | 36 | 2.3 |
29110 | 114 - 173 | 29 | - | 1400 | 6 | 1.25 | 2.2 | 0.035 | 53 | 227 | 119 | 55/64 | 36 | 2.3 |
30110 | 145 - 220 | 30 | - | 1800 | 5 | 1.28 | 2.7 | 0.02 | 42.8 | 127.5 | 79.5 | 46/55 | 41.5 | 1.1 |
31110 | 172 - 261 | 31 | - | 2200 | 4 | 1.4 | 3 | 0.015 | 38 | 127.5 | 79.5 | 46/55 | 41.5 | 1.1 |
32110 | 217 - 330 | 32 | - | 2600 | 3 | 1.55 | 3.5 | 0.01 | 32 | 127.5 | 79.5 | 46/55 | 41.5 | 1.1 |
710110 | 260 - 400 | - | 710 | - | '2.8' | 1.75 | 4 | 0.007 | 28 | 127.5 | 79.5 | 46/55 | 41.5 | 1.1 |
570110 | 330 - 500 | - | 570 | - | '2.2' | 2.2 | 4.5** | 0.005 | 23 | 127.5 | 79.5 | 46/55 | 41.5 | 1.1 |
* Non-adjustable mounting feet
**5.3 dB @ 500 GHz
Specifications | ||||||
Waveguide | WG10 to WG29 | WG30 | WG31 | WG32 | WM710 | WM570 |
Attenuation Accuracy | 0 dB to 60 dB 0.1 dB or 1% whichever is greater | 0 dB to 50 dB 0.15 dB or 1.2% whichever is greater | 0 dB to 45 dB 0.2 dB or 1.5% whichever is greater | 0 dB to 40 dB 0.2 dB or 1.5% whichever is greater | 0 dB to 35 dB 0.3 dB or 2.0% whichever is greater | 0 dB to 30 dB 0.4 dB or 2.5% whichever is greater |
Operating temperature range: +5°C to +35°C (Refer to Flann for wider temperature range consideration)