WIDEBAND BEAM-TYPE PARAMETRIC AMPLIFIER.
Final technical rept. for 1 Apr 63-31 Jul 64,
SPERRY GYROSCOPE CO GREAT NECK N Y
Pagination or Media Count:
The objectives of the program were to develop a beamtype parametric amplifier at X-band with a bandwidth of 20 percent, a gain of 25 db, and a double-channel noise figure of 2 db. This final technical report covers the experimental study, design, construction, and test of the tube. Using a modified bifilar helix as the coupler circuit and a periodic quadrupole circuit as the pump circuit, an experimental Kompfner dip greater than 20 db in 6 percent of the frequency band or 10 db in 10 percent of the band was achieved. An electronic gain of 7 db, with a small variation across the band, was insufficient to overcome the 12-db loss on the couplers and electron beam. The pump power used was 14 watts. Signal and idler frequencies were investigated. The ion-oscillation problem is discussed. Other discussions are concerned with the problems of bifilar helix fabrication, electron gun alignment, and magnetic field shaping. Recommendations for future refinement are made. Author