NDLI: S-band omnidirectional antenna for the sert-c satellite

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S-band omnidirectional antenna for the sert-c satellite

Content Provider	NASA Technical Reports Server (NTRS)
Author	Cofer Jr., J. W. Sinclair, M. J. Sheppard, R. R. Bassett, H. L.
Copyright Year	1975
Description	The program to design an S-band omnidirectional antenna system for the SERT-C spacecraft is discussed. The program involved the tasks of antenna analyses by computer techniques, scale model radiation pattern measurements of a number of antenna systems, full-scale RF measurements, and the recommended design, including detailed drawings. A number of antenna elements were considered: the cavity-backed spiral, quadrifilar helix, and crossed-dipoles were chosen for in-depth studies. The final design consisted of a two-element array of cavity-backed spirals mounted on opposite sides of spacecraft and fed in-phase through a hybrid junction. This antenna system meets the coverage requirement of having a gain of at least minus 10 dBi over 50 percent of a 4 pi steradian sphere with the solar panels in operation. This coverage level is increased if the ground station has the capability to change polarization.
File Size	67131759
Page Count	170
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19750019146
Archival Resource Key	ark:/13960/t3809vw4f
Language	English
Publisher Date	1975-05-01
Access Restriction	Open
Subject Keyword	Communications And Radar Space Electric Rocket Tests Ultrahigh Frequencies Spiral Antennas Computer Techniques Omnidirectional Antennas Superhigh Frequencies Spacecraft Antennas Antenna Radiation Patterns Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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