Vivaldi Antenna with Improved Performance

摘要

A Vivaldi antenna having a structure capable of improving sidelobe and front-to-rear ratio characteristics and suppressing a desired frequency band is provided. An antenna according to an embodiment of the present invention includes a substrate; a first metal pattern formed on the substrate; a second metal pattern formed on the substrate; a power feeding unit formed in a first region of the substrate by the first metal pattern and the second metal pattern; a radiation portion formed in the second region of the substrate by the first metal pattern and the second metal pattern, wherein the first metal pattern is corrugated on a portion opposite to the portion forming the first region and the second region A structure is formed, and in the second metal pattern, a corrugation structure is formed in a portion opposite to a portion forming the first region and the second region. As a result, by adding a corrugation structure to the periphery of the Vivaldi antenna, side lobes are reduced, front-to-rear ratio characteristics are increased, and antenna gain is increased.