Accession Number:

AD0261989

Title:

INVESTIGATION OF NOISE GENERATION IN ELECTRICALLY TUNABLE MICROWAVE OSCILLATORS

Descriptive Note:

Corporate Author:

CORNELL UNIV ITHACA NY

Personal Author(s):

Report Date:

1961-06-15

Pagination or Media Count:

1.0

Abstract:

Results are discussed which were obtained on the research project investigation of Noise Generation in Electrically Tunable Microwave Oscillators. Four aspects have been considered signalto-noise calculations, noise measurements, noise cancellation techniques, and circuit aspects of noise. In the signal-to-noise calculations a linear theory for backward wave oscillators is being developed which is intended as a guide in the design of low-noise tubes. The approach is to use a digital computer to discover the tube parameters that yield optimum noise performance. New computer results are reported. A linear theory for traveling-wave tubes, based on a normal mode expansion of the tape helix is outlined. Two noise-measurement programs are discussed. Progress is reported on the development of apparatus to measure noise near the carrier. The design of a beam noise analyzer is described. The noise cancellation research which is discussed involves consideration of higherorder beam-mode effects in helical beam couplers and possible experimental applications. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE