Digital frequency synthesizer for radar astronomy

Details Digital frequency synthesizer for radar astronomy Digital frequency synthesizer for radar astronomy

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9115951s&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Digital Radar Systems, Frequency Synthesizers, Oscillators, Radar Astronomy, Deep Space Network, Design Analysis, Frequencies, Purity, Spectra

Scientific paper

The digital frequency synthesizer (DFS) is an integral part of the programmable local oscillator (PLO) which is being developed for the NASA's Deep Space Network (DSN) and radar astronomy. Here, the theory of operation and the design of the DFS are discussed, and the design parameters in application for the Goldstone Solar System Radar (GSSR) are specified. The spectral purity of the DFS is evaluated by analytically evaluating the output spectrum of the DFS. A novel architecture is proposed for the design of the DFS with a frequency resolution of 1/248 of the clock frequency (0.35 mu Hz at 100 MHz), a phase resolution of 0.0056 degrees (16 bits), and a frequency spur attenuation of -96 dBc.

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