Patent ID: 7598824

Claim:
A circuit for combining/splitting a first RF signal having wavelength of x, and a second RF signal having a wavelength of y, said circuit comprising: first and second transmission portions coupled at an intersection, said first transmission portion comprising at least two intersecting transmission lines, each having a length which is an odd multiple of about ¼ y, said second transmission portion comprising at least two intersecting transmission lines, each having a length which is an odd multiple of about ¼ x, wherein x and y differ by a multiple of ½ x±⅛ x; and first, second and third ports, said first port located at said first port transmission portion, said second port located at said intersection of said first and second transmission portions, and said third port being located at said second transmission portion, said first and second ports being electrically coupled, and said second and third ports being electrically coupled.