| 摘要 |
PROBLEM TO BE SOLVED: To perform downsizing and thinning an antenna while suppressing reduction in antenna efficiency. SOLUTION: An antenna structure 1 includes an antenna body 2 in which a fed radiation electrode 5 and a non-fed radiation electrode 6 for generating a double resonance state are formed on a dielectric substrate 4, and a substrate 3 for mounting the antenna body 2 thereon. A ground electrode 10 is formed on the substrate 3 by avoiding a ground-electrodeless portion 11. The ground-electrodeless portion 11 is formed on at least a portion of a mounting area A of the antenna body 2 and at a portion sticked out of and away from the mounting area A of the antenna body 2 consecutively the portion. Grounding ends 5a, 6a of the fed radiation electrode 5 and the non-fed radiation electrode 6 formed on the substrate 4 are connected to the ground electrode 10 via grounding line patterns 13, 14 formed on the ground-electrodeless portion 11 being outside the mounting area A of the antenna body 2. COPYRIGHT: (C)2004,JPO |
