level and a waveguide array with wendelantennen

摘要

There is provided an improved planar antenna, for use in satellite communication, capable of providing higher aperture efficiency, improved circular polarization and increased production tolerability. The antenna comprises a waveguide and an array of M x N helical antenna elements, wherein M and N are integers. The waveguide includes a primary feeder waveguide and a set of M secondary feeding waveguides, wherein each of the M secondary feeding waveguides is provided with N helical antenna elements, each of the secondary feeding waveguides is coupled to the primary feeder waveguide through an aperture so that received signals from N helical antenna elements in each of the second feeding waveguides are combined at the primary feeder waveguide. IMAGE