| US 7,483,727 B2 | ||
| Mobile wireless communications device having improved antenna impedance match and antenna gain from RF energy | ||
| Lizhong Zhu, Waterloo (Canada); Yihong Qi, Waterloo (Canada); Michael Corrigan, Waterloo (Canada); Krystyna Bandurska, Waterloo (Canada); and Ying Tong Man, Kitchener (Canada) | ||
| Assigned to Research In Motion Limited, Waterloo, Ontario (Canada) | ||
| Filed on Apr. 04, 2005, as Appl. No. 11/98,274. | ||
| Prior Publication US 2006/0223597 A1, Oct. 05, 2006 | ||
| Int. Cl. H04M 1/00 (2006.01) | ||
| U.S. Cl. 455—575.5 [455/575.1; 455/575.7; 455/575.8; 455/90.3; 361/818; 343/702; 343/872; 340/870.11; 330/129] | 23 Claims |
| 1. A mobile wireless communications device comprising:
a housing;
a circuit board having a ground plane and carried by the housing;
radio frequency (RF) circuitry and a processor operative with each other and carried by the circuit board;
an antenna carried by the housing and operative with the RF circuitry;
audio circuitry carried by the circuit board and operative with the RF circuitry and processor;
an audio transducer assembly comprising an audio transducer housing and carried by the circuit board and having electrical
contact pads that electrically engage audio circuitry for carrying audio signals between the audio circuitry and the audio
transducer assembly; and
at least one filter mounted at the audio transducer assembly and configured for blocking RF energy from the antenna through
the audio transducer assembly to the ground plane and decoupling the antenna from the audio transducer assembly and any other
components on the circuit board to minimize any detuning of antenna impedance match and degradation in antenna gain, wherein
said at least one filter is at least one of serially connected within the audio transducer housing and connected between the
audio transducer housing and the contact pads.
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