| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an antenna unit and a receiver of which a directional antenna is configured with a simple structure for space saving, and is mounted on a small wireless communication terminal to provide directivity. <P>SOLUTION: An inverted L shaped antenna element 3 is supplied with a current from a feeding part 4 through the side surface of a mounting board 2 or its one side. The inverted L shaped antenna element 3 comprises a high dielectric element 5 of low loss in contact with its upper surface and having the area several times the inverted L shaped antenna element 3 including the antenna upper surface. The high dielectric element 5 is easily reduced in mounting area by employing a thin film type film adhesive tape or the like. In terms of mounting area, the area is widened in both width direction and length direction to cover at least the antenna element upper surface, thereby improving effect as an antenna. Relating to the high dielectric element 5, the values of antenna length, specific inductive capacityε, and the mounting area of high dielectric material are set optimum so that the inverted L shaped antenna element 3 operates around 1/2λto provide directional gain. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
