Microstrip array antenna

Details Microstrip array antenna Microstrip array antenna

1991-08-12

1993-01-19

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

343872, H01Q 138, H01Q 2106

Patent

active

051810425

ABSTRACT:
A planar microstrip array antenna with a beam tilt, which comprises a plurality of pairs of circularly polarized wave radiating elements, the orientation angles of the two radiating elements in each pair being different by a predetermined angle within the plane of the planar antenna. The antenna further comprises a feed line for supplying electric power to the radiating elements. The feed line is provided with a plurality of pairs of terminal feeding portions which diverge corresponding individually to the pairs of circularly polarized wave radiating elements. The paired feeding portions are equal in electrical length. Since the respective orientation angles of the paired radiating elements are different, a phase difference is produced between the radiating elements, thus providing a beam tilt. Since no phase shift portion for producing a phase difference is formed between the paired terminal feeding portions, the configuration of the feed line is simple.

REFERENCES:
patent: 4477813 (1984-10-01), Weiss
patent: 4543579 (1985-09-01), Teshirogi
patent: 4697189 (1987-09-01), Ness
patent: 4758843 (1988-07-01), Agrawal et al.
patent: 4761653 (1988-08-01), Owens et al.
patent: 4761654 (1988-08-01), Zaghloul
patent: 4829309 (1989-05-01), Tsukamoto et al.
patent: 4866451 (1989-09-01), Chen
Haneishi et al., "Broadband Circularly Polarised Planar Array Composed of a Pair of Dielectric Resonator Antennas", Electronic Letters, 9th May 1985, vol. 21, No. 10.
Mailloux et al., "Microstrip Array Technology", Jan. 1981, pp. 25-37, IEEE Transactions on Antennas & Propagation, vol. AP-29.

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