| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ring antenna which is easily manufactured, makes damage due to impact unlikely to occur, and achieves the weight saving. <P>SOLUTION: In a ring antenna 10, antenna elements 12 to 14 are formed by plating layers formed on a roughened surface of a base substance 11. Thus, the ring antenna 10 is manufactured easily. Further, since the base substance 11 is formed by dielectric plastic which has higher toughness and smaller specific gravity compared to ceramics, the damage due to impact is unlikely to occur and the weight saving is achieved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
