ANTENNA

PROBLEM TO BE SOLVED: To provide an antenna which is capable of linearly radiating a radio wave of a sufficient strength and can be disposed at a narrow space such as a thin pole or a hole.SOLUTION: The antenna includes: a substrate 1 extending in a predetermined direction; a power supply section 2 provided on the substrate 1; a termination resistor section 3 provided on the substrate 1; and a strip line section 4 provided on the substrate 1 and connecting the power supply section 2 and the termination resistor section 3 in an electrifiable state. The strip line section 4 includes a plurality of strip lines 43a and 43b which extend in a length direction of the substrate 1 and are formed so as to be arranged side by side in a horizontal column state while being spaced apart from each other by a predetermined distance in a width direction of the substrate 1. Between the strip lines 43a and 43b, a parasitic electrode section 5 is provided which extends in the length direction of the substrate 1 and is spaced apart from the strip lines 43 by a predetermined distance. The parasitic electrode section 5 has a length that is about a half wavelength of a frequency of a current flowing in the strip lines 43a and 43b. 【課題】十分な強度の電波を線状に放射することができ、ひいては細い柱や穴などの狭所に配置することが可能なアンテナを提供する。【解決手段】本アンテナは、所定の方向に延びる基板１と、基板１上に設けられた給電部２と、基板１上に設けられた終端抵抗部３と、基板１上に設けられ、給電部２と終端抵抗部３を通電可能な状態で接続するストリップライン部４とを備える。ストリップライン部４は、基板１の長さ方向に延び、かつ基板１の幅方向に互いに所定距離を隔てながら横列状態に並ぶ態様に形成された複数のストリップライン４３ａ、４３ｂを備える。各ストリップライン４３ａ、４３ｂの間において、基板１の長さ方向に延び、かつ各ストリップライン４３と所定距離を隔てる態様で無給電電極部５が設けられる。無給電電極部５はストリップライン４３ａ、４３ｂを流れる電流の周波数の半波長程度の長さを有する。【選択図】図１