Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2005-11-22
2005-11-22
Trinh, Sonny (Department: 2687)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S575100, C455S080000
Reexamination Certificate
active
06968203
ABSTRACT:
The invention relates to a mobile terminal antenna system for a first radio application (RA1) and a second radio application (RA2) the system comprising first radio electronic circuits (REC1) for the first radio application (RA1), and second radio electronic circuits (REC2) for the second radio application (RA2). The system also comprises an end-fed antenna (4) for the first radio application (RA1), the end-fed antenna (4) having an extended shape and being connected to the first radio electronic circuits (REC1). The system comprises a dipole antenna (5) for the second radio application (RA2), the dipole antenna (5) being located near one end of the end-fed antenna (4) and connected to the second radio electronic circuits (REC2). The first radio electronic circuits (REC1) are connected to the dipole antenna (5), whereby the end-fed antenna (4) is adapted to be fed, during transmission, against the dipole antenna (5) by the first radio electronic circuits (REC1), whereby the dipole antenna (5) is adapted to serve as a counterpoise for the end-fed antenna (4).
REFERENCES:
patent: 4721962 (1988-01-01), Gorzel
patent: 5220334 (1993-06-01), Raguenet et al.
patent: 5375256 (1994-12-01), Yokoyama et al.
patent: 2002/0115436 (2002-08-01), Howell et al.
patent: 2003/0151556 (2003-08-01), Cohen
patent: 0952625 (1999-10-01), None
patent: 2000-183643 (2000-06-01), None
patent: WO97/41619 (1997-11-01), None
Balanis: “Antenna theory analysis and design”, pp. 566-571, John Wiley & Sons.
Arrl: “The Radio Amateur's Handbook 1967”, p. 369.
Doan Phuoc
Potomac Patent Group PLLC
Telefonaktiebolaget L M Ericsson (publ)
Trinh Sonny
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