| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna having high radiation efficiency and small variations in the radiation characteristics. SOLUTION: The antenna is provided with a high-frequency line 1, consisting of a line conductor 3 formed on the top surface of a dielectric layer 2, and a coplanar grounding conductor layer 4 formed so as to surround one end portion of the line conductor 3; a slot 5 formed on the conductive layer 4 so as to cross the line conductor 3 at right angles; and a plurality of shield conductors 6 formed in the inside of the dielectric layer 2 so as to surround the slot 5. In the antenna, the distance between the line conductor 3 and the conductor layer 4 is set smaller near a junction portion 7 with the slot 5 than in the external periphery side of the dielectric layer 2. COPYRIGHT: (C)2007,JPO&INPIT
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