Suppression in Active Devices-Circuits.
Abstract
The aim of this project is to study the spurious emissions from transit-time Gunn diodes which affect the electromagnetic compatibility of these devices. Harmonic emission far from the fundamental and noise emission in the vicinity of the fundamental have been studied. Efforts on the harmonic program this year were directed toward the isolation and elimination of extraneous reflections and interferences in the far infrared interferometer. Noise from Gunn effect oscillators has been extensively measured. A major contribution to the noise spectrum is upconverted flicker noise present in the diode current. An analytic treatment of this up-conversion process is given. Good agreement is found between measured and calculated spectra. From a single noise measurement performed on a sample in a standard circuit, one may calculate the sample's noise spectrum in an arbitrary circuit if the loaded Q, power, and voltage pushing are known. Transit-time Gunn diodes are characterized by an equivalent noise temperature of 7500K which is comparable to the noise temperature of klystrons. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1969
- Accession Number
- AD0864906
Entities
People
- J. M. Ballantyne
Organizations
- Cornell University College of Engineering