Short conical antenna

Details Short conical antenna Short conical antenna

1993-03-01

1995-12-26

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Spiral or helical type

H01Q 136

Patent

active

054791820

ABSTRACT:
An antenna suitable for mounting upon vehicles, vessels or aircraft for communication via satellites comprises a conductive ground plane and a radiator element in the form of a conductor helically wound to define a frusto-conical shape with the ground plane as its base. The conductor may be formed upon a dielectric substrate in the shape of a truncated cone. The dimensions of the antenna element are selected so that the pitch angle of the radiator element varies between a minimum of about 6 degrees and a maximum of about 8 degrees. The required pitch angle may be achieved when the cone angle of the frusto-conical shape is between 5 degrees and 20 degrees and the mean diameter of the frusto-conical shape is between 0.3 and 0.47 of a mean operational wavelength predetermined for the antenna. The length of the radiator element is selected to be the minimum needed to sustain a wave. Optimum performance with compact size is attained when the ground plane is about two thirds of the operational wavelength, the cone angle is about 10 degrees and the maximum diameter of the frusto-conical shape is equal to about one half of the wavelength.

REFERENCES:
patent: 2919442 (1959-12-01), Nussbaum
patent: 3283332 (1966-11-01), Nussbaum
patent: 3449752 (1969-06-01), Spitz et al.
patent: 3550136 (1970-12-01), Walter et al.
patent: 3568205 (1971-03-01), Buxton et al.
patent: 3641580 (1972-02-01), Monser
patent: 4097867 (1978-06-01), Eroncig
patent: 4114164 (1978-09-01), Greiser
patent: 4161737 (1979-07-01), Albright
patent: 4169267 (1979-09-01), Wong et al.
patent: 4494117 (1985-01-01), Coleman
patent: 4525720 (1985-06-01), Corzine et al.
patent: 4675690 (1987-06-01), Hoffman
patent: 4697192 (1987-09-01), Hofer et al.
patent: 4742359 (1988-05-01), Ishino et al.
patent: 4800395 (1989-01-01), Balzano et al.
patent: 4945363 (1990-07-01), Hoffman
A 50 ohm Input Impediance for Helical Beam Antennas, John D. Kraus, IEEE Transactions on Antennas and Propagation, vol. AP-25, No. 6, Nov. 1977.
A Helical Launcher for the Helical Antenna, B. A. Munk and L. Peters, Jr., IEEE Transactions on Antennas and Propagation, May 1968.
Extremely Low-Profile Helix Radiating a Circularly Polarized Wave, Hisamatsu Nakano et al., IEEE Transactions on Antennas and Propagation, vol. 39, No. 6, Jun. 1991.
A New Helical Antenna Design for Better On-and Off-Boresight Axial Ration Performance, Cheng Donn, IEEE Transactions on Antennas and Propagation, vol. AP-28, No. 2, Mar. 1980.
An Experimental Investigation of Cavity-Mounted Helical Antennas, A. Bystrom, Jr. et al, IRE Transactions on Antennas and Propagation, Jan.
Backfire Radiation from a Monofilar Helix with a Small Ground Plane, Hisamatsu Nakano et al IEEE Transactions on Antenna and Propagation, vol. 36, No. 10, Oct. 1988.
Domestic Mobile Satellite Systems in North America, Muya Wachira, International Mobile Satellite Conference, Ottawa, 1990.
Radiation Characteristics of Short Helical Antenna and its Mutual Coupling, H. Nakano et al, Electronics Letters, Mar. 1, 1984, vol. 20 No. 5.
Impedance Matching of Helical Antennas, Robert J. Stegen, IEEE Transactions of Antennas and Propagation, Jan. 1956.

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