Designing an array-fed imaging reflector antenna engineering model for 21-GHz band satellite broadcasting system

The 21-GHz band satellite broadcasting system is studied for transmission channels that can deliver Ultra High Definition TV, 3DTV, etc. We assumed the allocation of two 300-MHz class wideband channels in the 21.4 to 22.0-GHz band and propose an array-fed imaging reflector antenna (array-fed IRA) to supply enough power for a transponder with such a wide band. The array-fed IRA is also an effective means of exploiting limited resources due to its ability to control radiation patterns because this band suffers from severe fading due to rain. In order to confirm the feasibility of the array-fed IRA system in the space environment, we designed an engineering model of an array-fed IRA for the 21-GHz band broadcasting satellite.