Abstract

This paper reports on the development of two generic satellite transponder channel amplifier subsystems for the 5.35-5.65 GHz band, respectively the 10.70-12,75 GHz band, both to be based on full application of GaAs MMIC technology. A novel Slope Compensation MMIC is introduced as a curative counter-measure to minimize residual inband gain ripple and slope. Furthermore, a control loop algorithm is used to account for all principal control characteristics, all interdependencies between them and all temperature effects. Measurements show competitive inband ripple-slope values for all gain settings over the complete temperature range.