Patent ID: 7274272
Filing Date: 2007-09-25
Classification: H01P

Abstract:
1. A microwave variable attenuator, comprising: an input terminal for inputting a microwave signal; an output terminal for outputting a microwave signal; a control voltage supplying means for supplying a control voltage; an input terminal matching means for matching an impedance of the input terminal in response to the control voltage; an output terminal matching means for matching an impedance of the output terminal in response to the control voltage; and an attenuating means for attenuating the microwave signal inputted to the input terminal based on an attenuation controlled according to the control voltage and outputting the attenuated microwave signal, the attenuating means including a first transmission line and a second transmission line, wherein the attenuating means includes a pin diode and a resonant inductor connected to each other in parallel for resonating an effect of a parallel capacitance.