| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact composite planar antenna system capable of ensuring an excellent radiation efficiency at both a high frequency operating frequency band and a low frequency operating frequency band. SOLUTION: The composite planar antenna system 1 includes: a first radiation conductor layer 3 provided on a front side 21a of one glass plate 21 of a mltilayer glass plate 2; a second radiation conductor layer 4 provided on a front side 22a of the other glass plate 22 of the multilayer glass plate 2; a circuit board 5 arranged in parallel with and opposite to the front side 21a of the glass plate 21; feeding pins 6, 7 for feeding power to the radiation conductor layers 3, 4; and a metal plate made bracket 8 for supporting the circuit board 5 and fitted to the glass plate 21, and one side of the circuit board 5 is provided with a ground conductor layer 9, and the other side is provided with an electronic circuit section 10. The interval between the radiation conductor layers 3, 4 whose resonance frequencies differ from each other and the ground conductor layer 9 is set to be narrow for the first radiation conductor layer 3 compatible with the high frequency band, and wide for the second radiation conductor layer 4 compatible with the low frequency band. COPYRIGHT: (C)2007,JPO&INPIT
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