| 摘要 |
[Problem] To provide an antenna capable of being used in a broad band and capable of freely adjusting highs and lows of a used frequency band. [Solution] An antenna (10A) is formed by: an unbalanced power supply member (11) which has a power supply unit and a non-power supply unit, and which extends in the lengthwise direction; a resonating conductor pipe (12) which is positioned outside of the power supply unit, and which covers the circumference surface of the power supply unit; and a ground conductor pipe (13) which is positioned outside of the non-power supply unit, and which covers the circumference surface of the non-power supply unit, and comprises a radio wave reflecting member (15) extending outwards the area surrounding the antenna (10A). The antenna (10A) is formed such that the resonating conductor pipe (12) and the ground conductor pipe (13) are electronically fixed via a connection conductor guide (14) to the unbalanced power supply member (11), and the power supply unit has an exposed section where the power supply unit is exposed, by a predetermined dimension, from the resonating conductor pipe (12) frontwards in the lengthwise direction.
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