BROADBAND MICROWAVE ATTENUATOR WITH CONTINUOUS CONTROL Russian patent published in 2012 - IPC H01P1/00 

FIELD: electricity.

SUBSTANCE: broadband microwave attenuator with continuous control contains two transmission lines with the same wave impedance, one of them is meant for microwave signal input, the other one is for output, Schottky-barrier field-effect transistor, two resistors, one of the ends of the first resistor is connected to transmission line at input, one of the ends of the second resistor is connected to transmission line at output, Schottky-barrier field-effect transistors are connected to control voltage source which contains two Schottky-barrier field-effect transistors to which also added are three resistors and inductance, drains of both Schottky-barrier field-effect transistors are connected with each other and with the other end of the second resistor, source of the first Schottky-barrier field-effect transistor is connected to the other end of the first resistor and simultaneously to one end of inductance, the other end of which is earthed, source of the second Schottky-barrier field-effect transistor is earthed, and gates of the first and the second Schottky-barrier field-effect transistors are connected to the source of control voltage through the fourth and the fifth resistors correspondingly.

EFFECT: expanding service band and reducing initial microwave losses.

4 dwg