Millimeter-Wave Measurement Instruments and Waveguide Components

Direct Reading Attenuator

Direct Reading Attenuator

The DAXE Millimeter-Wave Direct Reading Attenuators are rotary-vane type attenuators. The value of attenuation is determined by the angle of rotation of a resistive film with respect to the waveguide and thus is independent of frequency.



The Attenuators are provided in seven waveguide bands between 18 GHz and 225 GHz.

Model number Frequency range, GHz Waveguide type Waveguide flange Attenuation accuracy Insertion loss, dB VSWR
DA12E 18 - 26.5 WR - 42 UG 595/U

±0.2dB for A=0÷10dB;

±0.02·A for A=10÷50dB;

±[1+0.05·(A-50)]dB for A=50÷60dB,  where

A is attenuation in dB.

 0.5 max 1.15max
DA08E 26.5 - 40 WR - 28 UG 599/U 0.6 max 1.15max
DA06E 33 - 50 WR - 22 UG 383/U 0.8 max 1.15max
DA04E 50 - 75 WR - 15 UG 385/U 0.8 max 1.15max
DA03E 75 - 110 WR - 10 UG 387/UM 1.0 max 1.2max
DA02E 110 - 170 WR - 06 UG 387/UM 2.5 max 1.3max
DA015E 170 - 225 WR - 05 UG 387/UM

±0.2dB for A=0÷10dB;

±0.02·A for A=10÷30dB;

 2.5 max 1.3max

Attenuation range: 0 ÷ 60 dB

Power rating: 0.1 W avg.