Patent ID: 8319580
Filing Date: 2012-11-27
Classification: H01P,H03F,H03H

Abstract:
1. An attenuator, comprising a first 3 dB bridge, a second 3 dB bridge and an amplifying tube group, wherein the amplifying tube group comprises a first amplifying tube and a second amplifying tube, a drain of the first amplifying tube is connected to a first output port of the first 3 dB bridge, a source of the first amplifying tube is connected to a first input port of the second 3 dB bridge, a drain of the second amplifying tube is connected to a second output port of the first 3 dB bridge, and a source of the second amplifying tube is connected to a second input port of the second 3 dB bridge; wherein the first 3 dB bridge and the second 3 dB bridge are respectively disposed with an isolating resistor used for absorbing power; and gates of the first amplifying tube and the second amplifying tube are respectively connected to the same voltage source or different voltage sources having the same voltage.