Planar antenna with helical antenna array and waveguide

Details Planar antenna with helical antenna array and waveguide Planar antenna with helical antenna array and waveguide

1994-08-01

1996-07-23

Hajec, Donald

Communications: radio wave antennas

Antennas

Spiral or helical type

343771, 343778, H01Q 136

Patent

active

055394213

ABSTRACT:
There is provided an improved planar antenna, for use in satellite communication, capable of providing higher aperture efficiency, improved circular polarization and increased production tolerability. The antenna comprises a waveguide and an array of M.times.N helical antenna elements, wherein M and N are integers. The waveguide includes a primary feeder waveguide and a set of M secondary feeding waveguides, wherein each of the M secondary feeding waveguides is provided with N helical antenna elements, each of the secondary feeding waveguides is coupled to the primary feeder waveguide through an aperture so that received signals from N helical antenna elements in each of the second feeding waveguides are combined at the primary feeder waveguide,

REFERENCES:
patent: 3701162 (1972-10-01), Seaton
patent: 4618865 (1986-10-01), Lamensdorf
patent: 4680591 (1987-07-01), Axford et al.
patent: 4916458 (1990-04-01), Goto

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