Patent ID: 8774067

Claim:
An apparatus comprising: a first antenna configured to resonate within a first frequency band; a second antenna disposed proximal to the first antenna and configured to resonate in a second frequency band; impedance stabilization circuitry configurable to stabilize the impedance seen by the first antenna in the direction of the second antenna; and a selective coupler configured to couple to the second antenna selectively with the impedance stabilization circuitry and with radio circuitry, the selective coupler comprising a first port configured to couple to the second antenna, a second port configured to couple to the impedance stabilization circuitry, and a third port configured to couple with radio circuitry, the radio circuitry configured to operate in the second frequency band; the selective coupler configured to provide a predetermined impedance via the impedance stabilization circuitry to signals within the first frequency band and to provide a low insertion loss to signals within the second frequency band.