Patent ID: 6414565
Filing Date: 2002-07-02
Classification: H01P

Abstract:
A variable attenuator, comprising:a comb line including first and second lines electromagnetically coupled to each other, each line having respective ends; a first diode having an anode and a cathode, the anode of the first diode being coupled to one end of the first line and the cathode being coupled to ground; a second diode having an anode and a cathode, the anode of the second diode being coupled to one end of the second line and the cathode being coupled to ground; a first control terminal coupled to the anode of the first diode and the corresponding end of the first line; and a second control terminal coupled to the anode of the second diode and the corresponding end of the second line, wherein an amount of coupling from the first line to the second line is variable as a continuous function of control voltages applied to the first and second control terminals.