Patent ID: 9350835
Filing Date: 2016-05-24
CPC Classification: H01Q,H04B,H04M

Claim Text:
1. A mobile electronic device comprising: a chassis including a ground plane; a processor carried by the chassis; a frequency tunable antenna carried by the chassis and fed by an inductor; a communications interface carried by the chassis and operative with the processor for receiving and transmitting RF signals via the frequency tunable antenna; audio circuitry carried by the chassis and operative with the communications interface and processor; an audio transducer having a coil in proximity to the frequency tunable antenna for at least one of receiving and transmitting audio signals from and to the audio circuitry; at least one RF choke configured for blocking RF energy from the frequency tunable antenna through the audio transducer to the ground plane and decoupling the antenna from the audio transducer to minimize any detuning of antenna impedance match and degradation in antenna gain; and at least one tunable capacitor connected in parallel with at least one of the audio transducer coil, the RF choke and the inductor, for providing dynamic RF energy blocking over an operating frequency range of the frequency tunable antenna; wherein a first tunable capacitor of said at least one tunable capacitor is connected in parallel with a first RF choke of said at least one RF choke forming a first tank circuit in series with the audio transducer, and a second tunable capacitor of said at least one tunable capacitor is connected in parallel with a second RF choke of said at least one RF choke forming a second tank circuit in series with the audio transducer.