Patent ID: 7528676
Filing Date: 2009-05-05
Classification: H01P

Abstract:
1. A balun comprising a single-ended port comprising a signal-carrying terminal; a differential port comprising a first signal-carrying terminal and a second signal-carrying terminal; and first and second sets of coupled transmission line sections, said first and second sets being located adjacent to one another; each of said first and second sets comprising a respective first transmission line section and a respective second transmission line section, each transmission line section within each set having a respective inner end and a respective outer end, said respective first transmission line sections being connected together in series at their respective inner ends, said respective second transmission line sections being connected together in series at their respective inner ends, wherein each of said first and second sets includes a respective third coupled transmission line section having a respective outer end connected to the respective outer end of the respective second transmission line section, and wherein said signal-carrying terminal of said single-ended port is connected to an inner end of one of said third coupled transmission line sections, and wherein said first and second signal-carrying terminals of said differential port are connected to a respective outer end of said first transmission line sections.