Antenna with graduated isolation circuit

Details Antenna with graduated isolation circuit Antenna with graduated isolation circuit

2006-05-30

2006-05-30

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

Active sleeve surrounds feed line

C343S790000, C343S793000

Reexamination Certificate

active

07053850

ABSTRACT:
A multiband antenna has a lower radiator and several upper radiators, all of which are spaced from each other and disposed on the same longitudinal axis. The lower radiator and the upper radiators form a dipole radiator that resonates in a lower frequency band. The upper radiators form a dipole radiator that resonates in a higher frequency band. Multiple isolation circuits in the upper radiators resonate at different frequencies within the lower frequency band.

REFERENCES:
patent: 3961331 (1976-06-01), Campbell
patent: 4131895 (1978-12-01), Robinson
patent: 4217589 (1980-08-01), Stahler
patent: 4479130 (1984-10-01), Snyder
patent: 5969690 (1999-10-01), Yamabayashi et al.
patent: 6078295 (2000-06-01), Rawle
patent: 6552692 (2003-04-01), Zeilinger et al.

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