Dichroic Sub-Reflector for Wide Band Techniques for Single Offset Antenna

The possibility to receive Ku band TV signals besides performing broadband interactive services in Ka band from the same orbital position enhances significantly the value of user satellite terminal. We propose a dichroic sub-reflector (DSR) based on the frequency selective surface (FSS) of periodic structure to achieve a wide-band high pass filter. The surface of the DSR is designed for reflection of Ku-band electromagnetic waves and pass through those of K- and Ka-band. The DSR is built in a double ring structure using a popular low cost FR4 - printed circuit board (PCB). We show full wave simulations, ray tracing calculated from blockage and measurement of Compact-Range chamber as well as far-field and teleport test results.