| 摘要 |
<P>PROBLEM TO BE SOLVED: To evade a generation of a factor which prevents a parallel resonance or a tendency to a low attitude, while multi-resonating an antenna device for a radio device. <P>SOLUTION: An antenna element included in the antenna device 1 has: a first partial element 11 fed from a feeding line 4; a second partial element 12 branched from the first partial element 11; and a parasitic element 20. The first partial element 11 forms a face having a fringe including a lower side 13 and a left side 14. A feeding portion 10 is disposed in the vicinity of a left end of the lower side 13. The second partial element 12 branches from the first partial element 11 at a branch portion 15 abutting an upper end of the left side 14 of the first partial element 11, and is formed in a direction substantially reverse to a direction from the feeding portion 10 toward a right end 16 of the lower side 13 of the first partial element 11. A leading edge 17 of the second partial element 12 is opened. The parasitic element 20 has: one end which is a grounding end 21 connected to a grounding conductor 3 in the vicinity of the right end 16 of the lower side 13 of the first partial element 11; and the other end which is an open end 22 opened in the vicinity of the leading edge 17 of the second partial element 12. <P>COPYRIGHT: (C)2009,JPO&INPIT |
