| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform adjustment of high-order resonance frequency of a power feed radiation electrode 3 while preventing the scale increase of a surface-mounted antenna. <P>SOLUTION: A loop-like power feed radiation electrode 3 extended and formed in a direction surrounding around a substrate 2 is formed on the substrate 2. One end side of the power feed radiation electrode 3 is formed as a power feed part Q and the other end side is formed as an open end K. Furthermore, a power feed part extension electrode 5 extended and formed in the inverse direction of a surrounding direction of the power feed radiation electrode 3 from the power feed part of the power feed radiation electrode 3 and in which the extended tip part is arranged at interval from the open end K of the power feed radiation electrode 3 is provided on the substrate 2, and parasitic radiation electrode 4 is formed on the side of an area in which the open end K of the power feeding radiation electrode 3 and the extended tip part of the power feeding part extension electrode 5 are formed at intervals. The parasitic radiation electrode 4 has a form in which at least a part of a current path of the parasitic radiation electrode 4 becomes parallel with the current path of the power feed radiation electrode 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
