Communications: radio wave antennas – Antennas – Microstrip
Patent
1996-12-04
1999-07-13
Wong, Don
Communications: radio wave antennas
Antennas
Microstrip
343731, H01Q 138
Patent
active
059232951
ABSTRACT:
A circular polarization microstrip line antenna transmits and receives right-handed and left-handed circularly polarized waves by one microstrip line antenna. A dielectric sheet 3 is laid on a metal base 4, and a flexible film 2 is laid on the dielectric sheet 3. Microstrip lines 5 are formed at the right and left sides of the surface of the flexible film 2. Rectangular waveguides 8 are arranged under the right and left ends of the metal base 4, a hole 9 is perforated at the upper surface of the rectangular waveguide 8, a hole 10 is perforated at the positoin opposed to the hole 9 of the metal base 4, and inverted L-shaped feeding pins 11 are inserted to the holes 9 and 10. The horizontal part 13 of the feeding pin 11 is interposed between the flexible film 2 and the dielectric sheet 3, and the horizontal part 13 is opposed to the right and left ends 5a of the microstrip line 5. Further, a probe 21 is arranged at the lower surface of the rectangular waveguide 8, and the right and left probes 21 are connected to a transmitter 16 or a receiver 17 by coaxial cables 18.
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patent: 5594455 (1997-01-01), Hori et al.
Kobayashi Kazuo
Nakano Hisamatsu
Ho Tan
Mitsumi Electric Co. Ltd.
Wong Don
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