Title :
14-GHz MIC 16-ns Delay Filter for Differentially Coherent QPSK Regenerative Repeater
Abstract :
A parallel-coupled microstrip fused silica filter at 14 GHz was developed as a 16-ns delay element for application to direct detection with a differentially coherent quaternary PSK (DQPSK) demodulator/regenerator module of an onboard regenerative repeater for future satellite-switched time-domain multiple-access (SS-TDMA) satellite communications systems. Design considerations, experimental results of the 14-GHz bandpass delay element, and a technique for precision measurement of the fused silica filter delay phase temperature coefficient are presented. In addition, the expected DQPSK demodulator performance is evaluated by simulation analysis using a comprehensive transmission channel modeling program.
Keywords :
Band pass filters; Delay; Demodulation; Microstrip filters; Microwave integrated circuits; Quadrature phase shift keying; Repeaters; Satellite communication; Silicon compounds; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest, 1978 IEEE-MTT-S International
Conference_Location :
Ottawa, ON, Canada
DOI :
10.1109/MWSYM.1978.1123780
