| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact dual band antenna easy to fine adjust its resonance frequency and its resonance frequency adjusting method. <P>SOLUTION: The dual band antenna 10 comprises an insulating base 11 mounted on a support board 21 with a ground conductor 20 provided on the backside, a first low-band radiation conductor plate 12 composed of a pair of parallel split conductor plates 13, 14 mounted at positions for closing an opening end 11a, a feed conductor plate 15 and a first short-circuit conductor plate 16 with their top ends continuing to the outer edge of the split conductor plate 13, a second short-circuit conductor plate 17 with its top end continuing to the outer edge of the split conductor plate 14 to electromagnetically couple with the feed conductor plate 15, and a second high-band radiation conductor plate 18 with its lower end connected to the feed conductor plate 15. The split conductor plate 14 has a bent piece 14b fitted into the side wall of the insulating base 11, and a cut 14c or a notch 14e is formed into the bent piece 14b to finely adjust the resonance frequency. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
