| 摘要 |
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 round plate located between the first and second micro-strip antennas, the ground plate being formed with an opening between the first an d second micro-strip antennas, (d) a first dielectric material sandwiched betw een 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 (i) 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 when electromagnetic wave is supplied to the first micro-strip antenna, the first micro-strip antenna resonates and radiates electromagnetic waves to atmosphe re therearound. The second micro-strip antenna is electromagnetically coupled t o the first micro-strip antenna through the opening formed at the ground plate . Asa result, the second micro-strip antenna resonates t o the first micro-strip antenna to thereby radiate electromagnetic waves to atmosphere similarly to the firs t micro-strip antenna. Hence, the antenna is able to have bi-directional or non-directional characteristic. In addition, since electric power is supplie d only to the first micro-strip antenna, it is no longer necessary for the antenna to incl ude a three-dimensional power distributor unlike a conventional antenna, ensuring thatthe antenna can be fabricated in a smaller size.
|
