Accession Number : AD0845585

Title :   L-Band Parametric Amplifier,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Wisniewski, F. ; Borkowski, Z.

Report Date : 02 MAY 1968

Pagination or Media Count : 10

Abstract : An L-band parametric amplifier consisting of a circulator, a parametric head, and a pump generator with power supply, is described. The amplifier design, measuring circuits and the results of laboratory measurements are given in the original article. The circulator is built with a strip line with N-type concentric terminals. The input coefficient of the standing wave of the circulator is less than 1.2. The losses are not greater than 0.5 db. The signal line is connected through its wide wall with a 22 x 10-mm wave guide. The pump generator is with a designed X-band 50-mv klystron. The bandwidth of the 20-db amplifier is 8 mcps. The resulting noise coefficient of the receiver with 20-db parametric amplification at the input is about 2.5 db with a noise coefficient of 13 db for the rest of the receiver. The parametric amplifier described was installed in 'Avia'-type surveillance radar located at the Warsaw Airport. The amplifier was placed between the TR resonator and the crystal mixer, requiring no further construction changes. To achieve stable operation, it was necessary to use a four-arm circulator which was made by connecting two three-arm circulators. The use of the parametric amplifier made it possible to increase the potential of the radar up to 10 db and the radar range to about 75%.

Descriptors :   (*PARAMETRIC AMPLIFIERS, L BAND), WAVEGUIDE CIRCULATORS, KLYSTRONS, PUMPING(ELECTRONICS), SEARCH RADAR, RADAR EQUIPMENT, GAIN, BANDWIDTH, NOISE(RADAR), STRIP TRANSMISSION LINES, POLAND.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE