Wireless terminals

Details Wireless terminals Wireless terminals

2003-04-01

2008-10-28

Pham, Chi H. (Department: 2616)

Multiplex communications

Duplex

Communication over free space

C370S290000, C370S295000, C455S082000, C343S702000, C343S7000MS

Reexamination Certificate

active

07443810

ABSTRACT:
A wireless terminal for use in the transmitting and receiving frequency bands of a frequency duplex system comprises transmitting and receiving stages (Tx, Rx) and signal propagating means (22, 24, 26) coupled to the transmitting and receiving stages. The signal propagating means comprises a narrow band antenna structure (24), such as a Planar Inverted-F Antenna (PIFA), having sufficient bandwidth to cover the larger one of the transmitting and receiving frequency bands and a BAW receiving filter (26) and a BAW transmitting filter (22) coupled by respective feeds to the antenna structure (24). The filters (22, 26) enable the antenna structure to have a small volume and be reusable at different FDD frequencies.

REFERENCES:
patent: 4672685 (1987-06-01), Phillips
patent: 5365246 (1994-11-01), Rasinger et al.
patent: 5926139 (1999-07-01), Korisch
patent: 6252554 (2001-06-01), Isohatala et al.
patent: 6278342 (2001-08-01), Ella
patent: 6332071 (2001-12-01), Brandt
patent: 6624788 (2003-09-01), Boyle
patent: 6664931 (2003-12-01), Nguyen et al.
patent: 61-265905 (1986-11-01), None
patent: WO 02/071535 (2002-09-01), None

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