The design of a broadband slotted waveguide antenna for electronical beam steering applications in MW radiometry

The design of a broadband slotted-waveguide antenna at Ka-band for electronic beam steering in microwave (MW) radiometry imaging will be introduced. The paper discusses the investigation of the enhancement of the scanning angle as a function of the slot spacing of a slotted-waveguide antenna in non-resonant mode with longitudinal shunt slots on the wide side of the rectangular waveguide. Furthermore a method for the improvement of the broadband antenna character is presented, which is a mandatory factor for a successful use in MW radiometry imaging applications.