WIDE-BAND BEAM-TYYPE PARAMETRIC AMPLIFIER.
Rept. for 1 Jan-30 Apr 64.
SPERRY GYROSCOPE CO GREAT NECK N Y
Pagination or Media Count:
An X-band, beam-type, parametric amplifier capable of operating in a twenty percent instantaneous band of frequency is under development. The device is a degenerate type with the pump frequency fixed at 21 Gc. The amplifier is to have an r-f gain of 25 db and a double-channel noise figure of 2 db. The device uses a modified bifilar helix as the coupler and a resonant quadrupolar circuit as the pump. Cold test data on r-f match, cavity Q, and circuit loss for the pump and coupler at their respective operating frequency ranges are presented. Best results on the coupler show that the VSWR is nominally at 2, and the cold insertion loss is about 4 db. Problems and results of the first and second devices constructed during the reporting period are discussed. The discussion includes d-c properties of electron gun and electron beam focusing, collector operation, Kompfner dip measurements, and signal transmission from coupler to coupler. Other problems such as coupler and pump synchronization, noisestripping, and ion oscillation are discussed. Preliminary gain data shows that the electronic gain is only about 3 db for a pump power of 7 wattss. Author