| 摘要 |
PROBLEM TO BE SOLVED: To provide a broadband dual loop antenna that can reduce number of side lobes, be miniaturized and be capable of covering all UHF bands by itself. SOLUTION: Loop antennas 4, 6 of a center feed type that are respectively configured such that a couple of feeding introduction sections 4b, 6b are extended from torus sections 4a, 6a are placed in a way that their arrangement direction is orthogonal to a wiring direction of the feeder introduction sections 4b, 6b, and 2-wire parallel feeders 8 interconnects the feeder introduction sections 4b, 6b of both loop antennas 4, 6. Furthermore, the impedance between a feeding point and each of both ends of the feeders 8 is respectively in matching with that of an external feeder and the loop antennas 4, 6 and the impedance between the both is continuously changed by wiring a couple of feeder lines of the parallel feeders 8 not in parallel but in inclination so that the interval of the lines is gradually changed.
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