| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a different frequency shared antenna which has a simplified circuit configuration without impairing reduction in thickness and has an advantage in low cost. <P>SOLUTION: A first radiating conductor 13 and a second radiating conductor 14 are concentrically formed on the top surface of a dielectric substrate 12, a ground conductor 15 is formed on the bottom surface of the dielectric substrate 12, and a feeding pin 16 is connected to the feeding point of the first radiating conductor 13. Also, a plurality of short pins 17 are connected to the inner circumference edge of the radiating conductor 14 to be short-circuited with the ground conductor 15, and a distance G between both the radiating conductors 13 and 14 is narrowed so that the radiating conductor 14 is substantially electromagnetically coupled with the radiating conductor 13. In the two frequency shared antenna 11 having this configuration, if the radiating conductor 13 is excited at a frequency fH by direct power feeding from the feeding pin 16, the radiating conductor 14 is fed with power by electromagnetic coupling and is excited at a frequency fL lower than the fH. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
