Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
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.
Salvail Gary
Yu I-Ping
Collins David W.
Lenzen, Jr. Glenn H.
Raytheon Company
Rudd Andrew J.
Wimer Michael C.
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