Accession Number : ADA017955
Title : Multitone Troposcatter Tube (G-Band).
Descriptive Note : Final rept. 1 Aug-31 Dec 74,
Corporate Author : HUGHES AIRCRAFT CO TORRANCE CALIF
Personal Author(s) : Tammaru,I.
Report Date : JUL 1975
Pagination or Media Count : 93
Abstract : The objective of the study was to optimize the design of G-band TWTs capable of amplifying between 4 and 16 equal-amplitude signals with a carrier-to-IM distortion power ratio of at least 20 dB, and demonstrating an overall efficiency of 25 percent minimum. The approach was to operate the tubes backed off from saturation to fulfill the distortion specification, and incorporate a four-stage depressed collector to achieve the efficiency. Detailed designs satisfying the requirements were established by computer analysis. The best designs had uniform RF circuits, which were operated closer to synchronism than in standard TWTs. The overall efficiency was 27 percent minimum in the band 4.4 - 5.O GHz for both a PPM-focused 1 kW tube and a solenoid-focused 10 kW tube (including solenoid power).
Descriptors : *Traveling wave tubes, G band, Microwave tubes, Tropospheric scatter communications, Tactical Communications, Intermodulation
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE