| 摘要 |
PROBLEM TO BE SOLVED: To widen a band width of an inverted-F plane antenna where a radiation conductor is fixed in parallel on one ground conductor with a short-circuit vertical flat plate. SOLUTION: A radiation conductor plate 5 is provided in opposition to a grounding conductor plate 2 and a short-circuit vertical flat plate 6 for short- circuiting them is placed at a position biased from the center of the radiation conductor plate 5 wherein the length of the short-circuit vertical flat plate 6 is selected smaller than the width of the radiation conductor plate 5 by 2×δ. Then the value of the aboveδis experimentally obtained, and the frequency band width is widened by means of dual tuning resonance between two resonance frequencies, that is, a self-resonance frequency of a feeder side of the radiation conductor plate 5 and self-resonance frequency of the opposite side.
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