Patent ID: 7518468

Claim:
A power divider-combiner circuit that divides a first signal input to a first port to produce a first divided signal and a second divided signal and outputs the first and second divided signals to a second port and a third port, respectively, and that combines a second signal and a third signal input to the second and third ports, respectively, to produce a combined signal and outputs the combined signal to the first port, wherein the power divider-combiner circuit includes a first transmission line having a predetermined line length and a second transmission line, wherein the first port is connected to the first transmission line at a first end of the first transmission line and the second port is AC-connected to the first transmission line at a second end of the first transmission line, wherein a first end of the second transmission line is connected to the first transmission line at the second end of the first transmission line, and wherein the third port is AC-connected to the second transmission line at a second end of the second transmission line, wherein the first transmission line has an electrical length that is a quarter of a wavelength λ of the first signal, and wherein the second transmission line has an electrical length that is half of the wavelength λ of the first signal.