| 摘要 |
PROBLEM TO BE SOLVED: To provide a slot antenna system that can easily be downsized and suitably used even for a circularly polarization antenna system. SOLUTION: The slot antenna system 10 is provided with: a dielectric board 11; a high frequency circuit 12 arranged to a bottom side of the dielectric board 11; a ground conductor layer 13 patterned to an upper side of the dielectric board 11; and a shield case 14 for supporting the dielectric board 11 and covering the high frequency circuit 12, a slot 15 is formed to the ground conductor layer 13, and a feeding line 16 crossing the slot 15 in the width direction is formed to the bottom side of the dielectric board 11. The feeding line 16 is connected to a feeding circuit, which feeds power to around both ends of the slot 15 in the width direction by electromagnetic coupling to the feeding line 16 to excite the slot 15, resulting in that the slot 15 emits a linearly polarized wave. COPYRIGHT: (C)2005,JPO&NCIPI
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