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Satellite communications relay system using a retrodirective space antenna

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2 Author(s)
Gruenberg, E. ; IBM Corporation, Bethesda, MD, USA ; Johnson, C.

A system has been developed for relaying messages via a satellite between earth points. In this system, messages transmitted to a satellite modulate a retrodirective antenna. Earth stations receive messages by irradiating the satellite antenna. Methods of modulating the retrodirective array are discussed with emphasis on methods to facilitate communications among several ground stations. There are advantages in spectrum usage and sharing with surface facilities. System design parameters are presented. Minimal power is required in the satellite as compared to the active communications satellites. Extremely high reliability is inherent in the design of the satellite electronic system, which can be made entirely from solid-state components.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:12 ,  Issue: 2 )

Date of Publication:

Mar 1964

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