| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized loop antenna which is formed in a conductor pattern of a printed circuit board and has a radiation characteristic uniform in all directions. SOLUTION: At positions away from a pair of power feeding parts approximately by a 1/4 wavelength, a pair of folded parts are formed by double-folding a conductor pattern so as not to cross each other but to be along with each other. The pair of folded parts are disposed proximately at a predetermined interval and conductor patterns including the pair of folded parts and formed to be along with each other form a circular or polygonal shape. COPYRIGHT: (C)2011,JPO&INPIT
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