NDLI: Space-qualified traveling-wave tube

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Space-qualified traveling-wave tube

Content Provider	NASA Technical Reports Server (NTRS)
Author	Krawczyk, Richard Dibb, Daniel R. Wilson, Jeffrey D. Williams, Wallace D. Zhai, Xiaoling Simons, Rainee N. Benton, Robert T. Menninger, William L. Robbins, Neal R.
Copyright Year	2010
Description	The L-3 Communications Electron Technologies, Inc. Model 999HA traveling-wave tube (TWT), was developed for use as a high-power microwave amplifier for high-rate transmission of data and video signals from deep space to Earth (see figure). The 999HA is a successor to the 999H a non-space qualified TWT described in High-Power, High-Efficiency Ka-Band Traveling-Wave Tube (LEW-17900-1), NASA Tech Briefs, Vol. 31, No. 2 (February 2007), page 32. Operating in the 31.8-to-32.3 GHz frequency band, the 999HA has been shown to generate 252 W of continuous- wave output power at 62 percent overall power efficiency a 75-percent increase in output power over the 999H. The mass of the 999HA is 35 percent less than that of the 999H. Moreover, taking account of the elimination of a Faraday cage that is necessary for operation of the 999H but is obviated by a redesign of high-voltage feed-throughs for the 999HA, the overall reduction in mass becomes 57 percent with an 82 percent reduction in volume. Through a series of rigorous tests, the 999HA has been qualified for operation aboard spacecraft with a lifetime exceeding seven years. Offspring of the 999HA will fly on the Kepler and Lunar Reconnaissance Orbiter missions.
File Size	145294
Page Count	1
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20100009688
Archival Resource Key	ark:/13960/t70w3g558
Language	English
Publisher Date	2010-03-01
Access Restriction	Open
Subject Keyword	Man/system Technology And Life Support Deep Space Traveling Wave Tubes Output Data Transmission Telecommunication Continuous Radiation Frequencies Microwave Amplifiers Power Efficiency 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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