Directional aerial system with curved main reflector mirror - has dipole group with background thin, dielectric reflector plate with wires in dipole polarisation direction

摘要

The application is intended for omnidirectional radar tracking aerial. The two primary radiator systems have their phase centres in the focal point of the main reflector mirror, and they have main radiation direction for illumination of the mirror. They are operated at different frequencies and with mutually orthogonal, linear polarisations. - One system is in the form of a diple, or a dipole group, with the reflector in the background, while the other one is in the form of a horn radiator. The reflector behind the dipole (4) is a thin plate (5) of dielectric material with embedded wires in the polarisation direction of the dipole. The dipole is secured mechanically to this plate which has an aperture for retaining the horn radiator (22).