| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a broadband antenna capable of achieving band-widening and multi-resonating. <P>SOLUTION: An antenna 100 comprises a plane conductor 1, a linear conductor 2, a feeding point 3, a ground plate 4 and the like. The plane conductor 1 has a rectangular plate shape, the feeding point 3 is formed at one corner thereof, and power feeding is performed. A side 1a (second side) communicating with the one corner is away from the side 4a (first side) of the ground plate 4 approximately in parallel by only a fine gap G. Furthermore, the other side 1b (third side) communicating to the one corner is located in a vertical direction to the side 4a of the ground plate 4. Then, the linear conductor 2 is connected near a terminal at an opposite side to the feeding point 3 on the side 1b. The surface of the plane conductor 1 and the surface of the ground plate 4 are positioned on the same surface and the linear conductor 2 is also disposed on the same surface. A low-frequency distance L=30 mm is about 1/4 with respect to a wavelength λL. A high-frequency distance H=19 mm is about 0.3 times with respect to a wavelength λH. The gap G is about 0.3 times or less of the high-frequency distance H=19 mm. <P>COPYRIGHT: (C)2009,JPO&INPIT |
