Communications: radio wave antennas – Antennas – Microstrip
Patent
1998-12-15
2000-07-04
Wong, Don
Communications: radio wave antennas
Antennas
Microstrip
343767, H01Q 138
Patent
active
060845481
ABSTRACT:
There is provided an antenna including (a) a first micro-strip antenna, (b) a second micro-strip antenna spaced away from and facing the first micro-strip antenna, (c) a ground plate located between the first and second micro-strip antennas, the ground plate being formed with an opening overlapping both the first and second micro-strip antennas, (d) a first dielectric material sandwiched between the first micro-strip antenna and the ground plate, (e) a second dielectric material sandwiched between the second micro-strip antenna and the ground plate, and (f) a micro-strip line formed on a surface of the first dielectric material and connected to the first micro-strip antenna. In accordance with the antenna, when electromagnetic wave is supplied to the first micro-strip antenna, the first micro-strip antenna resonates and radiates electromagnetic waves to atmosphere therearound. The second micro-strip antenna is electromagnetically coupled to the first micro-strip antenna through the opening formed at the ground plate. As a result, the second micro-strip antenna resonates to the first micro-strip antenna to thereby radiate electromagnetic waves to atmosphere similarly to the first micro-strip antenna. Hence, the antenna is able to have bi-directional or non-directional characteristic. In addition, since electric power is supplied only to the first micro-strip antenna, it is no longer necessary for the antenna to include a three-dimensional power distributor unlike a conventional antenna, ensuring that the antenna can be fabricated in a smaller size.
REFERENCES:
patent: 4899164 (1990-02-01), McGrath
patent: 5510803 (1996-04-01), Ishizaka et al.
Office Action Issued by the Japanese Patent Office on Apr. 6, 1999 for the Corresponding Japanese Application and an English Translation Thereof.
Nguyen Hoang
Wong Don
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