An X-band spacecraft transponder for deep space applications - Design concepts and breadboard performance

Details An X-band spacecraft transponder for deep space applications - Design concepts and breadboard performance An X-band spacecraft transponder for deep space applications - Design concepts and breadboard performance

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992itmtt..40.1192m&link_type=abstract

IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480), vol. 40, no. 6, June 1992, p. 1192-1198. Previously annou

Computer Science

Performance

Deep Space Network, Phase Error, Signal Reception, Space Exploration, Superhigh Frequencies, Transponders, Automatic Control, Automatic Gain Control, Breadboard Models, Cassini Mission, Comet Rendezvous Asteroid Flyby Mission, Downlinking, Phase Modulation, Power Amplifiers, Radio Receivers, Telemetry, Uplinking

Scientific paper

The design concepts and measured performance characteristics are summarized of an X band (7162 MHz/8415 MHz) breadboard deep space transponder (DSP) for future spacecraft applications, with the first use scheduled for the Comet Rendezvous Asteroid Flyby (CRAF) and Cassini missions in 1995 and 1996, respectively. The DST consists of a double conversion, superheterodyne, automatic phase tracking receiver, and an X band (8415 MHz) exciter to drive redundant downlink power amplifiers. The receiver acquires and coherently phase tracks the modulated or unmodulated X band (7162 MHz) uplink carrier signal. The exciter phase modulates the band (8415 MHz) downlink signal with composite telemetry and ranging signals. The receiver measured tracking threshold, automatic gain control, static phase error, and phase jitter characteristics of the breadboard DST are in good agreement with the expected performance. The measured results show a receiver tracking threshold of -158 dBm and a dynamic signal range of 88 dB.

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