Patent ID: 7469131

Claim:
An apparatus comprising: an antenna transducer including a first port and a second port that is physically separated from the first port, wherein the antenna transducer further includes a transducer portion having an open end, a first feed line contact projecting from the transducer portion and engaging the first port, and a second feed line contact projecting from the transducer portion and engaging the second port, the first and second feed line contacts being positioned along the transducer portion at respective lengths from the open end of the transducer portion, wherein the sum of the length of the transducer portion from the open end to the first feed line contact, and the length of the first feed line contact, is equal to approximately one-quarter wavelength of the first radio signals within the first frequency band, wherein the sum of the length of the transducer portion from the open end to the second feed line contact, and the length of the second feed line contact, is equal to approximately one-quarter wavelength of the second radio signals within the second frequency band, wherein the antenna transducer is configured to selectively transduce at least one of first radio signals at least one of to or from the first port within a first frequency band, or second radio signals at least one of to or from the second port within a second frequency band, and wherein the antenna transducer is configured such that an impedance at the second port approaches one of a short circuit or an open circuit when the antenna transducer transduces the first radio signals, and such that an impedance at the first port approaches an open circuit when the antenna transducer transduces the second radio signals.