Circularly polarized microstrip antenna array

Details Circularly polarized microstrip antenna array Circularly polarized microstrip antenna array

1988-02-24

1989-05-23

Sikes, William L.

Communications: radio wave antennas

Antennas

Microstrip

343853, H01Q 138

Patent

active

048334820

ABSTRACT:
An antenna arrangement is disclosed for radiating and receiving circularly polarized radiation. A first antenna array having parallel stripline conductors is disposed on the top surface of a dielectric substrate. The stripline conductors have radiating tabs protruding outwardly therefrom in a direction about 45 degrees from the stripline conductors. A second antenna array having a second plurality of stripline conductor is disposed on the substrate. The second stripline conductors are interdigitated with the first stripline conductors. The second stripline conductors also have a plurality of outwardly protruding radiating elements which form about a 90 degree angle with the first radiating elements. The first and second antenna arrays are fed with two independent signals about 90 degrees apart and will independently radiate a horizontally linearly polarized wave and a vertically linearly polarized wave respectively, which becomes a circularly polarized wave at far field. The interdigitated antenna pattern allows a compact antenna arrangement to be fabricated while lessening the tendency of adjacent antennas to cross-couple and distort the transmitted signal.

REFERENCES:
patent: 4063245 (1977-12-01), James et al.
patent: 4071846 (1978-01-01), Oltman
patent: 4180817 (1979-12-01), Sanford
patent: 4217549 (1980-07-01), Henoch

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