| 摘要 |
<P>PROBLEM TO BE SOLVED: To supply a small size, simple structure, and low price antenna which can be commonly used at three frequency bands. <P>SOLUTION: The antenna is a frequency common-use antenna used at the same time in three frequency bands, and comprises a printed circuit board composed of a dielectric material, 2 through-holes which penetrate through the printed circuit board in vertical directions, and antenna radiation elements formed on the front surface of the printed circuit board. The antenna includes 4 conductors arranged on the top surface of the printed circuit board, 3 conductors arranged on the rear surface of the printed circuit board, and 3 conductors arranged on the front surface and the both side surfaces of the printed circuit board. The antenna has a structure, in which a part of conductors arranged on the top surface of the printed circuit board and a part of conductors arranged on the rear surface of the printed circuit board are electrically connected through the through-holes and the conductors arranged on the front surface and the side surfaces. <P>COPYRIGHT: (C)2004,JPO |
