| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multi-frequency common antenna that can be easily reduced in size and low in posture while maintaining a wideband characteristic and is suitable to be included in a portable terminal. <P>SOLUTION: This multi-frequency common antenna 1 is provided with a three-layer structured dielectric formed with lamination by sandwiching a middle dielectric layer 12 made of a low dielectric material between top and bottom dielectric layers 13 and 11 made of high dielectric materials, a feeding conductor pattern 21 formed between the middle dielectric layer 12 and the top dielectric layer 13, wherein a base end is connected to a feeding point on the prescribed side face of the three-layer structured dielectric, and a ground conductor pattern 22 formed between the middle dielectric layer 12 and the bottom dielectric layer 11, wherein the base end is grounded on a prescribed side face. The feeding conductor pattern 21 and the ground conductor pattern 22 are formed by connecting a plurality of linear conductors, respectively, from the base end to a top end having at least a pattern formed by returning the linear conductors near a side face opposite from the prescribed side face. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
