| 摘要 |
PROBLEM TO BE SOLVED: To provide a downsized antenna system that is manufactured with simple manufacturing processes and mounted even on a mobile communication apparatus having a broadband characteristic or a high sensitivity reception characteristic, and a terrestrial digital broadcast reception function. SOLUTION: A three-dimensional helical antenna pattern with a prescribed total length circulating between first and second principal sides 2a, 2b of a double-side board 2 is configured by carrying out inter-layer connection of a first unit antenna pattern 3 formed on the first principal side 2a of the double-side board 2 to a second unit antenna pattern 4 formed on the second principal side 2b by via-holes 5, 6. COPYRIGHT: (C)2006,JPO&NCIPI
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