Title :
11-GHz MIC QPSK Modulator for Regenerative Satellite Repeater
Author :
Ohm, Gerhard ; Alberty, Michael
Abstract :
An 11-GHz MIC QPSK modulator for a 14/11-GHz, 120-Mbit/s regenerative satellite repeater is described. The modulator consists of cascaded 90° and 180° phase switches, realized with circulators and PIN diodes. The static and the dynamic behavior are presented. It is shown how the bit-error-rate performance is deteriorated by slow switching transients and timing errors.
Keywords :
Artificial satellites; Circulators; Communication switching; Microwave integrated circuits; Phase modulation; Phase shift keying; Quadrature phase shift keying; Repeaters; Schottky diodes; Switches;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1982.1131344
