Dipole ring array antenna for circularly polarized pattern

Details Dipole ring array antenna for circularly polarized pattern Dipole ring array antenna for circularly polarized pattern

1984-01-10

1985-11-26

Lieberman, Eli

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343DIG2, 343853, H01Q 2120, H01Q 128

Patent

active

045557080

ABSTRACT:
A NAVSTAR satellite has a navigation antenna array beamed toward the earth. A communications antenna array for communicating with other satellites requires a pattern null near the axis and high gain to the sides with minimum losses. This is achieved with a dipole ring array comprising eight elements surrounding the navigation array. The ring has a diameter of 1.1 wavelength, and is fed with equal amplitudes and a third mode phase progression, which produces good circular polarization in the far field. For a different sized dipole ring, there will still be an optimum phase distribution which will give good circularly polarized patterns.

REFERENCES:
patent: 4103304 (1978-07-01), Burnham

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