The variable attenuator is used to adjust power, reduce reflection interaction, and provide isolation for certain components where needed. These attenuators contain a section of waveguide with a narrow slot milled in the broad wall. Through this slot, a thin metalized Mylar vane is introduced into the waveguide by a precision micrometer. The driver mechanism is arranged to provide 0-30 dB of attenuation over 0.300-inch travel on the micrometer dial. Featuring no backlash, these units will produce accurate and reproducible settings.
This product is also available with a metric micrometer drive assembly.
VA10R is a Variable Attenuator in WR10 with a round flange hole pattern.