The ESSA solutionESSA (Electronic Switching Spherical Array) is a fixed truncated spherical antenna with its elements over the complete surface, conceived to satisfy many future antenna system requirements. Constant gain and beam shape throughout large volumetric coverage regions are the principle characteristics. In the present paper, the two existing types of ESSA are discussed. ESSA I is a simple nonphase correcting aperture approach characterized by light weight, low dc power consumption, gain between +7 and +14 dB, and 90% spherical coverage. ESSA II is a phase corrected aperture which would have very low sidelobe levels and improved gain over ESSA I (12 to 22 dB), but would be heavier and require more dc power.
Document ID
19790029303
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hockensmith, R. P. (NASA Goddard Space Flight Center Spacecraft Technology Div., Greenbelt, Md., United States)
Stockton, R. (Ball Brothers Research Corp. Boulder, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: In: NTC ''77; National Telecommunications Conference