Patent ID: 6515557
Filing Date: 2003-02-04
Classification: H01P

Abstract:
A signal divider/combiner for dividing/combining signals of first and second similar narrowband frequencies comprising:first, second and third transmission lines meeting at a junction, the first, second and third transmission lines having substantially the same impedance as each other, the first and second transmission lines having substantially the same impedance throughout their length; a first transmission line stub section coupled to the first transmission line to substantially block signals of the second frequency along the first transmission line; and a second transmission line stub section coupled to the second transmission line to substantially block signals of the first frequency along the second transmission line, wherein the first transmission line stub section is a first open-circuit stub positioned a first distance from the junction, the first distance being substantially equal to an odd multiple number of quarter-wavelengths of the second frequency, and wherein the second transmission line stub section is a second open-circuit stub positioned a second distance from the junction, the second distance being substantially equal to an odd multiple number of quarter-wavelengths of the first frequency.