| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radiation electrode capable of performing excellent radio wave communications over a plurality of frequency bands. <P>SOLUTION: A loop-shaped radiation electrode 7 is arranged so as to be extended over a plurality of surfaces (6a-6d) of a dielectric substrate 6 and further, the front end side of the loop-shaped radiation electrode 7 is branched to provide a plurality of branched radiation electrodes 8A, 8B. One side end side Q of the radiation electrode 7 functions as an electric feeding portion connected to an external circuit 10. One of the branched radiation electrodes 8B is an in-loop branched radiation electrode 8B which is surrounded by a loop-shaped electrode including a radiation electrode region 9 extended from the feeding portion Q of the radiation electrode 7 to a branching portion and the other branched radiation electrode 8A connected to the branched radiation electrode region, the in-loop branched radiation electrode 8B positioned at an interval from the loop-shaped electrode. A capacity is generated between the branched radiation electrode 8B and the radiation electrode region 9 extended from the feeding portion Q of the radiation electrode 7 to the branching portion. <P>COPYRIGHT: (C)2004,JPO |
