Armstrong Westerman Hattori McLeland & Naughton
Variable attenuator
 A variable attenuator includes a resistance region, a signal line to which the resistance region is connected, a very high frequency signal being propagated through the signal line, and a voltage applying part which applies a dc voltage across the ends of the resistance region, the dc voltage controlling a magnitude of attenuation to the very high frequency signal. 
Fujitsu Limited
H
H01P
inventional
Shin
Watanabe