发明名称 Multiformat auto-handoff communications handset
摘要 Disclosed is an apparatus and method for supporting communications and handoffs between multiple signal formats at multiple carrier frequencies. Antenna circuitry which includes a linearly polarized antenna and a circularly polarized antenna is utilized to receive and transmit the multiple signal formats at the multiple carrier frequencies simultaneously. A pair of RF signal paths each including RF transmit circuitry, RF receive circuitry and RF processing capabilities are utilized to support simultaneous communications between two signal formats. A multisystem controller in communications with each RF signal path initiates and completes handoffs between the multiple signal formats utilizing both RF signal paths to achieve uninterrupted communications across a large service coverage area.
申请公布号 US5649308(A) 申请公布日期 1997.07.15
申请号 US19950556863 申请日期 1995.11.02
申请人 TRW INC. 发明人 ANDREWS, SCOTT
分类号 H01Q1/24;H01Q21/30;H04B1/40;H04W36/18;H04W88/06;(IPC1-7):H04B1/38 主分类号 H01Q1/24
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