Communications: radio wave antennas – Antennas – Plural diverse-type antennas using same active element
Patent
1999-02-24
2000-06-20
Ho, Tan
Communications: radio wave antennas
Antennas
Plural diverse-type antennas using same active element
343791, 343792, 343876, H01Q 100
Patent
active
060782951
ABSTRACT:
An antenna for use with low-band, mid-band and high-band signals, including a coaxial member, a low-band and mid-band signal input connected between one end of the coaxial member outside conductor and the device chassis ground, and a high-band signal input connected between one end of the coaxial member outside conductor and the corresponding end of the coaxial member inside conductor. A first isolation filter adapted to block low-band and mid-band signals from the coaxial member is between the coaxial member and the high-band signal input. A parallel resonant circuit is at the other end of the coaxial member outside conductor and a solid conductor is connected to the parallel resonant circuit and to the other end of the coaxial member inner conductor. The low-band signal input is disconnected from high-band signals by, for example, an RF switch or a second isolation filter between the coaxial member and the low-band signal input.
REFERENCES:
patent: 4366485 (1982-12-01), Hodgkinson
patent: 4382260 (1983-05-01), Ranghelli
patent: 5307078 (1994-04-01), Tanaka et al.
patent: 5311201 (1994-05-01), Lillie et al.
patent: 5668564 (1997-09-01), Seward et al.
Ericsson Inc.
Ho Tan
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