Antenna refk 不 Antenna feedhorn protection from FIGURE 102.4 Simplified block diagram of a communications satellite. COMBINER RCVR1 H Power AmplierH RCVR2HD ner通 Power Amplifier COMBINER SwITCH FIGURE 102.5 Simplified block diagram of GSTAR satellite. e 2000 by CRC Press LLC© 2000 by CRC Press LLC FIGURE 102.4 Simplified block diagram of a communications satellite. FIGURE 102.5 Simplified block diagram of GSTAR satellite