Patent ID: 6630874
Filing Date: 2003-10-07
Classification: H01P,H03H

Abstract:
A phase shifter comprising:a first comb-line defined by first and second transmission lines electromagnetically coupled with each other; a second comb-line defined by third and fourth transmission lines electromagnetically coupled with each other; and variable-capacitance diodes respectively connected to the third and fourth transmission lines defining said second comb-line, wherein: a first end of the first transmission line is connected to an input terminal; a second end of the second transmission line is connected to an output terminal; the variable-capacitance diodes are respectively connected between first ends of the third and fourth transmission lines and the corresponding grounds; and a second end of the first transmission line and a second end of the second transmission line are connected to a second end of the third transmission line and a second end of the fourth transmission line, respectively.