Patent ID: 8344959

Claim:
An apparatus comprising: an antenna; a first feed port defining a first end of the antenna and a second feed port defining a second end of the antenna; a third feed port that interfaces to the antenna at an intermediate point between the first and second ends; an impedance disposed along the antenna and configured such that in a first mode signals to or from the first and second feed ports resonate along the whole of the antenna and in a second mode signals to or from the third feed port resonate along a portion of the antenna, said portion terminating at the impedance; and in which the signals in the first mode comprise signals in a first frequency band, and the signals in the second mode comprise signals in a second frequency band and signals in a third frequency band; wherein: the impedance comprises a first impedance and a second impedance arranged serially along the antenna; the first impedance is configured to pass signals in the first and second frequency bands and to block signals in the third frequency band from reaching the second impedance; and the second impedance is configured to pass signals in the first frequency band and to block signals in the third frequency band.