| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antenna device capable of attaining a broad frequency band and easily performing multi-pin power supply without causing an increase in dimensions, mass and cost or without deteriorating a radiation characteristic. SOLUTION: A circular patch 3 is formed in a conical shape so as to make a distance h1 between the central part 3a of the circular patch 3 and a ground conductor plate 1 shorter than a distance h2 between a circumferential part 3b of the circular patch 3 and the ground conductor plate 1. Consequently, it is possible to attain the broad frequency band and to easily perform multi-pin power supply without causing an increase in dimensions, mass and cost or without deteriorating a radiation characteristic. COPYRIGHT: (C)2005,JPO&NCIPI
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