Communications: radio wave antennas – Antennas – Spiral or helical type
Patent
1984-05-16
1986-08-26
Lieberman, Eli
Communications: radio wave antennas
Antennas
Spiral or helical type
H01Q 136
Patent
active
046085742
ABSTRACT:
A backfire bifilar helix antenna is disclosed having two helically wound conductors made of coaxial cable wherein the two conductors comprise the shield portion of the cable. The coaxial cable of one of the conductors serves as a transmission line for supplying signals to the feed end of the antenna and has its center conductor connected to the shield of the other conductor cable. The nominal input impedance of the antenna may be adjusted to a desired value by conductive surface layers attached to the shield portion of the conductors at the feed end.
REFERENCES:
patent: 3564553 (1971-02-01), Leonard
patent: 3599220 (1971-08-01), Dempsey
patent: 3757345 (1973-09-01), Carver
patent: 4008479 (1977-02-01), Smith
patent: 4011567 (1977-03-01), Ben-Dov
patent: 4014028 (1977-03-01), Cone et al.
Junji Yamauchi, Hisamatsu Nakano and Hiroaki Mimaki, Backfire Bifilar Helical Antenna with Tapered Feed End, IEEE International Symposium on Antennas and Propagation (1981) pp. 683-686.
C. C. Kilgus, Resonant Quadrifilar Helix Design, The Microwave Journal (Dec. 1970) pp. 49-54.
John D. Kraus, A 50-Ohm Input Impedance for Helical Beam Antennas, IEEE Transactions on Antennas and Propagation, vol. AP-25, No. 6 (Nov. 1977) p. 913.
Willard T. Patton, A Backfire Bifilar Helical Antenna, Antenna Laboratory Technical Report, No. 61, (Sep. 1962) AD 289084.
Stilwell Robert K.
Webster Carson W.
Kundert Thomas L.
Lieberman Eli
Singer Donald J.
The United States of America as represented by the Secretary of
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