Improved splash-plate feed parabolic reflector antenna for Ka-Band VSAT applications

In this study, we propose a conical dielectric loaded circular waveguide opening to splash plate subreflector for parabolic antenna feed. Corrugations on the dielectric lens and splash-plate structure are optimized for antenna performance. The feed structure is designed as axi-symmetric to support zero-order azimuth currents for low cross-polarization. Resulting structure offers good gain, low sidelobe, good cross-polarization, and low VSWR for Ka-band VSAT applications where receive and transmit frequency bands are 20.2-21.2 GHz and 30-31 GHz, respectively.