Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1974-11-08
1976-02-24
Lieberman, Eli
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343895, H01Q 136
Patent
active
039407721
ABSTRACT:
An antenna for radiating circularly polarized signals omnidirectionally about and broadside a support mast is provided by four conductors helically 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 pitch of the helically wound conductors is selected relative to the radius of the conductors to achieve substantially circularly polarized radiation substantially perpendicular or broadside to the lengthwise axis of the mast.
REFERENCES:
patent: 3449657 (1969-06-01), Fredriksson et al.
patent: 3503075 (1970-03-01), Gerst
patent: 3599220 (1971-08-01), Dempsey
Lieberman Eli
Norton Edward J.
RCA Corporation
Troike Robert L.
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