| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a walkie talkie and an antenna assembly having a radiation pattern that is close to omnidirectional. <P>SOLUTION: The walkie talkie comprises a substrate 2 where a radio circuit 20 is mounted; a built-in antenna 3 that comprises a feeder point on a first conductive board 1 provided on the substrate 2; and a second conductive board 5, that is arranged on the side of the first conductive board 1 which is different from the surface where the built-in antenna 3 is arranged, and comprises a ground side 4 that is grounded to the first conductive board 1. Since by providing the second conductive board 5, the phase difference between the current of the first conductive board 1 and that of the second conductive board 5 becomes larger, the radiations from the first conductive board 1 and from the second conductive board 5 reinforce each other. As a result, the gain on the side where the second conductive board 5 is present becomes larger, as compared with that when second conductive board 5 is not provided, and this results in the radiation pattern approximating that of omnidirectionality. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
