NDLI: The 20 ghz spacecraft impatt solid state transmitter

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The 20 ghz spacecraft impatt solid state transmitter

Content Provider	NASA Technical Reports Server (NTRS)
Author	Best, T. Ngan, Y. C.
Copyright Year	1986
Description	The engineering development of a solid-state transmitter amplifier operating in the 20-GHz frequency range is described. This effort involved a multitude of disciplines including IMPATT device development, circulator design, multiple-diode circuit design, and amplifier integration and test. The objective was to develop a transmitter amplifier demonstrating the feasibility of providing an efficient, reliable, lightweight solid-state transmitter to be flown on a 30 to 20 GHz communication demonstration satellite. The work was done under contract from NASA/Lewis Research Center for a period of three years. The result was the development of a GaAs IMPACT diode amplifier capable of an 11-W CW output power and a 2-dB bandwidth of 300 MHz. GaAs IMPATT diodes incorporating diamond heatsink and double-Read doping profile capable of 5.3-W CW oscillator output power and 15.5% efficiency were developed. Up to 19% efficiency was also observed for an output power level of 4.4 W. High performance circulators with a 0.2 dB inserting loss and bandwidth of 5 GHz have also been developed. These represent a significant advance in both device and power combiner circuit technologies in K-band frequencies.
File Size	7290371
Page Count	78
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870008556
Archival Resource Key	ark:/13960/t06x47m7t
Language	English
Publisher Date	1986-09-01
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Gallium Arsenides Transmitters Spacecraft Communication Avalanche Diodes Insertion Loss Bandwidth Circulators Phase Shift Circuits Solid State Devices Amplifiers 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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