Highly isolated multiple frequency band antenna

Details Highly isolated multiple frequency band antenna Highly isolated multiple frequency band antenna

1997-05-17

1999-08-10

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Spiral or helical type

H01Q 136

Patent

active

059365943

ABSTRACT:
A multiple frequency band, multi-spiral antenna that employs filters to pass the band of one spiral and reject the band of the other spirals. Additional isolation is achieved by arranging adjacent spirals to have opposite senses. All the isolation and filtering is accomplished within the body of the antenna. The antenna includes two, two-arm spirals. The higher frequency spiral resides in the interior of the lower frequency spiral. The two spirals are concentric about each other, and lie on the same plane. A balun and filter circuit is connected to the two spirals, and is disposed within the antenna body.

REFERENCES:
patent: 3683385 (1972-08-01), Corzine et al.
patent: 5619218 (1997-04-01), Salvail et al.

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