• 3% accuracy (0-40dB)
  • 5% accuracy (41-50dB)
  • Attenuation Range: 0 dB to 50 dB
  • Direct reading
  • 49.9 GHz to 112 GHz
  • WG25, WG26 and WG27

The Flann 114 RVA is an commercial grade, direct reading, rotary vane attenuator for use in millimeter wave test sets.

This attenuator has a calibrated dial which indicates the attenuation value directly.

A precision 10 turn, 75 mm diameter helical drum scale provides high resolution and discrimination of the drum scale
over a 0 dB to 40 dB attenuation range.

In addition, provides reference only measurements up to 60 dB.

Phase variation over the attenuation range is negligible.

Choking of the rotating joints is employed to minimise RF leakage whilst sound mechanical design ensures the instruments are free from backlash.

By using high value attenuation markings on the scale, symmetrically positioned about the maximum attenuation position, the user is able to verify the attenuation characteristic alignment which gives the highest confidence in the accuracy of subsequent measurements.

Custom Built Units:-

Combined rotary vane attenuator and rotary vane phase changer units are also available; these units are usually coupled at the circular waveguide section thereby minimising mismatch errors at low attenuation settings.

Specifications: All ranges 0 dB to 50 dB with the following accuracy:

WG25 to WG27WG25 - WG27
Attenuation accuracy0 dB to 40 dB40 dB to 50 dB
0.1 dB or 3% whichever is greater2.5 dB max

Operating temperature range: +5°C to +35°C

Other waveguide sizes available, please contact the sales team.

ModelFrequency Range (GHz)WaveguideVSWR
(better than)
Maximum Insertion Loss
Maximum Power (Watts)Dimensions (mm)Weight
2511449.9 - 75.825-620151.21.00.151001167245300.735
2611460.5 - 92.026-740121.21.30.1891167245300.735
2711473.8 -112.027-900101.21.50.07891167245300.740