Dual function antenna structure and a portable radio having same

Details Dual function antenna structure and a portable radio having same Dual function antenna structure and a portable radio having same

1995-08-21

1997-02-25

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Active sleeve surrounds feed line

343702, 343791, 343792, 343895, H01Q 904

Patent

active

056063326

ABSTRACT:
A dual function antenna structure transceives in first and second modes. A first feed (120) feeds a primary antenna element (110) for operation in the first mode. A second feed (240) connects to the first feed (120). An upper choke (150) and a metal layer (160) are tuned to a wavelength of the radio frequency energy to be transceived in the second mode. The primary antenna element (110) and the metal layer (160) thus realize a secondary antenna element for operation in the second mode. In a portable radio, dual function operation is thus possible by a compact structure by the first and second feeds (120, 140).

REFERENCES:
patent: 2184729 (1939-12-01), Bailey
patent: 2199375 (1940-04-01), Lindenblad
patent: 3000008 (1961-09-01), Pickles
patent: 3879735 (1975-04-01), Campbell et al.
patent: 4352109 (1982-09-01), Reynolds et al.
patent: 4410893 (1983-10-01), Griffee
patent: 4433336 (1984-02-01), Carr
patent: 4509056 (1985-04-01), Ploussios
patent: 4725846 (1988-02-01), Hendershot
patent: 4937588 (1990-06-01), Austin
patent: 4963879 (1990-10-01), Lin
patent: 5349365 (1994-09-01), Ow et al.
S. Egashira et al., "A Design of AM/FM Mobile Telephone Triband Antenna", IEEE Transactions on Antennas and Propagation, vol. 42, No. 4, Apr. 1994, pp. 538-545.

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