Patent ID: 7633358

Claim:
A phase shifter circuit, comprising: a plurality of first series circuits each comprised of a series connection of one capacitor and one resistor; a first circuit element including at least inductance connecting between a first end and a second end of a chain structure made by connecting the plurality of first series circuits in series such that capacitors and resistors alternate with each other, the first circuit element and the chain structure together constituting a first loop circuit; a plurality of second series circuits each comprised of a series connection of one capacitor and one resistor; a second circuit element including at least inductance connecting between a first end and a second end of a chain structure made by connecting the plurality of second series circuits in series such that capacitors and resistors alternate with each other, the second circuit element and the chain structure together constituting a second loop circuit; a plurality of connection lines connecting between connection points of the first loop circuit and connection points of the second loop circuit, two adjacent ones of the connection points of the first loop circuit being two end points of a series connected resistor and capacitor of one of the first series circuits; a signal input terminal connected to a node in the first loop circuit; and a signal output terminal connected to a node in the second loop circuit.