| 摘要 |
PROBLEM TO BE SOLVED: To prevent irregular occurrence of phase shift due to the change of a frequency and to make a band to be wide in a loop antenna having a plurality of loops. SOLUTION: The antenna is provided with the three loops 13a, 13b and 14a formed in circular shapes, feeding lines 13c, 14b, 15 and 16 which follow the respective loop parts 13a, 13b and 14a, and a power distribution unit 17 distributing and supplying power to the feeding lines 13c, 14b, 15 and 16. A difference of lengths of the respective feeding lines from the power distribution unit 17 to the respective loop 13a, 13b and 14 through the feeding lines 13c, 14b, 15 and 16 is within a range of 0 to 0.1λ. COPYRIGHT: (C)2005,JPO&NCIPI
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