Direct Reading Attenuators
Full band attenuators are waveguide based attenuators of four types: fixed, level setting, direct reading and programmable. These attenuators are offered to cover the frequency range of 18 to 140 GHz. Direct reading and programmable attenuators are constructed with a precision, resistive rotary vane in a circular waveguide. The operating mode of the attenuators is the circular waveguide, TE11 mode. Unlike fixed and level setting attenuators, the attenuation value and phase shift of these attenuators are independent of the frequency. The direct reading attenuator uses a large scale dial to indicate the attenuation value, making this attenuator ideal in waveguide systems when a broadband direct reading of attenuation or a standard for system calibration and instrumentation is required.