BASE STATION ANTENNA RADIATOR HAVING FUNCTION FOR SUPPRESSING UNWANTED RESONANCES

Provided is a base station antenna radiator having a function for suppressing unwanted resonances. The disclosed base station antenna radiator comprises: a first balun substrate which is placed so as to be perpendicular to a reflection plate, has formed on the upper surface thereof a feed line, a first C-coupling member spaced apart from the feed line, and a first inductive filter line connected to the first C-coupling member and having a narrower width than that of the first C-coupling member, and has formed on the lower surface thereof a third C-coupling member facing the first C-coupling member, and a third inductive filter line electrically connected to the first inductive filter line via a first via hole and connected to the third C-coupling member; a second balun substrate which is orthogonally coupled to the first balun substrate, is placed so as to be perpendicular to the reflection plate, and has a metal pattern formed thereon which is substantially the same as the metal pattern of the first balun substrate; and a radiation substrate which is disposed on the first balun substrate and the second balun substrate so as to be parallel with the reflection plate, and has at least one radiation patch formed on the upper surface thereof, wherein a terminal end of the first C-coupling member is electrically connected to the radiation patch, and a terminal end of the third C-coupling member is electrically connected to the reflection plate or an element having ground potential. The disclosed radiator has a merit of being capable of suppressing unwanted resonances in the base station antenna which is provided with both a low-frequency radiator and a high-frequency radiator. L'invention concerne un élément rayonnant d'antenne de station de base ayant une fonction pour supprimer des résonances indésirables. L'élément rayonnant d'antenne de station de base selon l'invention comprend : un premier substrat de symétriseur qui est placé de manière à être perpendiculaire à une plaque de réflexion, a formé sur sa surface supérieure une ligne d'alimentation, un premier élément de couplage en C espacé de la ligne d'alimentation, et une première ligne de filtre inductive connectée au premier élément de couplage en C et ayant une largeur plus étroite que celle du premier élément de couplage en C, et a formé sur sa surface inférieure un troisième élément de couplage en C faisant face au premier élément de couplage en C, et une troisième ligne de filtre inductive connectée