SLOTTED WAVEGUIDE ANTENNA FOR RECEPTION OF CIRCULAR POLARIZED WAVES

摘要

A slotted waveguide antenna for receiving circularly polarized waves capable of improving impedance matching, an axial ratio and an axial ratio bandwidth by additionally forming a dielectric plate between a conductive plate having waveguides and a polarizer of an uppermost layer is disclosed. The slotted waveguide antenna for reception of circularly polarized waves, which includes a lower conductive plate and an intermediate conductive plate which are coupled to each other to have a feeding line and a waveguide to which satellite frequency signals are transmitted and an upper conductive plate which is coupled to an upper portion of the intermediate conductive plate and has a plurality of cavities and slots to communicate with the waveguide so as to transmit and receive satellite frequency signals, includes a polarizer (100) with strip conductors (110) for converting linearly polarized waves into circularly polarized waves and matching stubs (120) which are formed at an upper portion of the upper conductive plate (200), and a dielectric plate (500) which is disposed between the upper conductive plate (200) and the polarizer (100) to perform impedance matching with space impedance.