Double beam radar antenna for e.g. microwave frequency energy transmission, has conducting blades radiated directionally in space with various radiation field patterns, and tongues propagating radiation directionally to guide cavity opening

摘要

The antenna has an elongated feed through guide with parallel lateral walls (12, 14) constituting an elongated cavity, and two thin central conducting blades (18, 20) placed inside the guide. The blades are radiated directionally in the space with different radiation field patterns. Tongues (24, 26, 28, 30) are distributed in the cavity between each blade and a lateral wall. The tongues are arranged to propagate the radiation directionally towards the opening of the cavity.