RADAR ANTENNA

To provide a radar antenna that has the required characteristics and performance while keeping manufacturing costs low.SOLUTION: A radar antenna includes a plurality of radiation stubs 21 that are formed on the front side of a plate-like horizontally elongated housing 2, and are groove-shaped extending approximately perpendicular to the longitudinal direction of the housing 2, and are arranged in parallel along the longitudinal direction of the housing 2, a waveguide portion that is formed within the housing 2, extends along the longitudinal direction of the housing 2, and communicates with each radiation stub 21, and a first dielectric 3 that is provided within each radiation stub 21, and is formed such that the center is thin and both ends are thick in the longitudinal direction of the radiation stub 21.SELECTED DRAWING: Figure 1 【課題】必要な特性・性能が得られ、かつ、製造コストを低く抑えることが可能なレーダアンテナを提供する。【解決手段】板状で横長の筐体２の前面側に形成され、筐体２の長手方向に対して略垂直に延びる溝状で、筐体２の長手方向に沿って平行に配置された複数の放射スタブ２１と、筐体２内に形成され、筐体２の長手方向に沿って延びるとともに、各放射スタブ２１と連通する導波管部と、各放射スタブ２１内に設けられ、放射スタブ２１の長手方向において中心部が薄く両端部が厚く形成された第１の誘電体３と、を備える。【選択図】図１