Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1976-01-28
1977-03-08
Lieberman, Eli
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343895, H01Q 136
Patent
active
040115674
ABSTRACT:
An antenna for radiating substantially circularly polarized signals omnidirectionally about and substantially broadside a support mast is provided by conductors wound about the mast. The conductors are spaced from the mast and are equally distributed about the periphery of the mast with signals coupled to the conductors such that the phase of the signal coupled to one conductor is 180.degree. out of phase with the phase of the signal coupled to adjacent conductors and is in phase with the phase of the signal coupled to the alternate conductor. The number of conductors wound about the mast is selected to be twice the mode number wherein the mode number is the number of 360.degree. linearly phase changes of the electric field in one circumference. The pitch angle of the helically wound conductors and the radius of the helix formed by the conductors is selected to achieve substantially, circularly polarized radiation substantially perpendicular or broadside the lengthwise axis of the mast.
REFERENCES:
patent: 3503075 (1970-03-01), Gerst
Lieberman Eli
Norton Edward J.
RCA Corporation
Troike Robert L.
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