| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a two frequency antenna which operates in two frequencies without need of a choke coil. <P>SOLUTION: A first element 11 which operates in a high frequency band is formed on the surface of a printed circuit board 10 with printing patterns, and a second element which operates in a low frequency band is formed on the back of the printed circuit board 10 with printing patterns so as not overlap the first element 11. The first element 11 is power supplied from a feeding point 13 of the lower end, and the second element 21 is power supplied through a through-hole 12 provided in the middle of the first element 11. The second element 21 is power supplied from the through-hole 12 through a strip feeding line, and the feeding line has a high impedance for high frequency. The first element 11 which corresponds to the feeding line is formed with a slit 11a. <P>COPYRIGHT: (C)2010,JPO&INPIT |
