BOTH POLARIZED WAVE TRANSMISSION/RECEPTION ANTENNA

To provide a both polarized wave transmission/reception antenna with a more simple structure.SOLUTION: A both polarized wave transmission/reception antenna 1 comprises: a broken annular part 20; an inner connecting wire 40 in an L-shape which is connected to two sides in an orthogonal direction in the broken annular part 20; a ground conductor plate 10 arranged to separate by a predetermined distance from the broken annular part 20; and a feeder 50 through which the broken annular part 20 is connected to a feeding point P1 of the ground conductor plate 10. The broken annular part 20 is separated from the ground conductor plate 10 and the two sides orthogonal to each other in the broken annular part 20 are connected to each other through the inner connecting wire 40, which enables the antenna to transmit and receive both polarized waves constituted of polarized waves from a straight line part in which a broken part A of the broken annular part 20 is formed and the inner connecting wire 40 and polarized waves from a straight line part in the orthogonal direction. Further, in the both polarized wave transmission/reception antenna 1, radiation as the antenna from the feeder 50 gets lower, so that degrees of freedom for a length of the antenna and a connection position thereof with respect to the inner connecting wire 40 become larger.SELECTED DRAWING: Figure 1 【課題】より簡単な構成の両偏波送受用アンテナを提供する。【解決手段】両偏波送受用アンテナ１では、破断環状部２０と、この破断環状部２０内の直交方向の２辺と接続するＬ字形状の内部接続線４０と、破断環状部２０から所定距離だけ離れて配置される地導体板１０と、地導体板１０の給電点Ｐ１から破断環状部２０を接続する給電線５０を有している。破断環状部２０を地導体板１０から離すと共に、破断環状部２０内の互いに直交する２辺をＬ字形状の内部接続線４０で接続することで、破断環状部２０の破断部Ａが形成される直線部と内部接続線４０からの偏波と、これと直交方向の直線部からの偏波とによる２偏波の送受信が可能になっている。そして、本実施形態の両偏波送受用アンテナ１では、給電線５０からアンテナとしての放射が低くなるため、その長さや内部接続線４０に対する接続位置についての自由度が大きくなっている。【選択図】図１