Microstrip antenna device for circularly polarized waves

Details Microstrip antenna device for circularly polarized waves Microstrip antenna device for circularly polarized waves

1987-09-30

1991-03-26

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Microstrip

H01Q 132

Patent

active

050033190

ABSTRACT:
A microstrip antenna device for circularly polarized waves includes a dielectric sheet member, one surface of which has a radiating conductor sheet member while the opposite surface has a ground conductor sheet member. Denoting a point where a segment of a line passing through a geometrical center o, o of the radiating conductor sheet member intersects with the substantial periphery of the radiating conductor sheet member by a and denoting a point where the segment intersects with the substantial periphery of the ground conductor sheet member by b, the ratio of the length between the points o and b to the length between the points o and a should be at least equal to 1.5. Where rectangular radiating and ground conductor sheet members are used, a good circular polarization is achieved without any disturbance in the radiating pattern when the diagonal ratio of the respective members is equal to or greater than 1.5.

REFERENCES:
patent: 4051478 (1977-09-01), Kaloi
patent: 4125837 (1978-11-01), Kaloi
Construction of a Microstrip Antenna for Circularly Polarized Waves with One Feeder Point, Haneishi et al. (Apr. 1987).
Microstrip Antennas, John Q. Howell, IEEE Transactions on Antennas and Propagation, vol. AP-23, No. 1 (Jan. 1975).
Edge Effects of Microstrip Antennas, Mishao Haneishi, et al. (Apr. 1987).

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