Title :
Local oscillator subsystem design for DAMA-SCPC system
Author :
Cheol Sig Pyo ; Soon Young Eom ; Jae Young Ahn ; Jae Ick Choi
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejon, South Korea
Abstract :
A LO subsystem with low cost, small size and low close-in phase noise has been developed for DAMA-SCPC system. Using the contrived loop gain control circuit, the loop gain in the full tuning band of the Ku-band synthesizer was uniformly kept, and the measured phase noise variations over the whole tuning band were within a maximum of 1 dB. The SSB phase noise obtained from the 13.555 GHz synthesizer output was as low as -88 dBc/Hz at 30 kHz offset, and the integrated phase noise over 30 Hz to 30 kHz offset was 0.96 RMS degrees. The nominal output power of the Ku-band synthesizer was 13 dBm and its flatness was less than 1 dB/sub (p-p/) in the full tuning band.
Keywords :
circuit tuning; demand assigned multiple access; electric noise measurement; frequency synthesizers; gain control; microwave oscillators; phase noise; satellite communication; 13.555 GHz; DAMA-SCPC system; Ku-band synthesizer; LO subsystem; SSB phase noise; flatness; integrated phase noise; local oscillator subsystem design; low close-in phase noise; measured phase noise variations; microwave local oscillators; nominal output power; satellite communication system; synthesizer output; tuning band; Circuit optimization; Costs; Gain control; Gain measurement; Integrated circuit measurements; Local oscillators; Noise measurement; Phase measurement; Phase noise; Synthesizers;
Conference_Titel :
Technologies for Wireless Applications Digest, 1995., MTT-S Symposium on
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-1982-6
DOI :
10.1109/MTTTWA.1995.512324
