Accession Number : ADP002516

Title :   MSSW (Magnetostatic Surface Waves) Delay Line Based Oscillators,


Personal Author(s) : Lander,V. ; Parekh,J. P.

Report Date : 1983

Pagination or Media Count : 4

Abstract : The present paper reports an experimental study of magnetostatic-wave (MSW) delay-line based oscillators utilizing magnetostatic surface waves (MSSW's) in epitaxial YIG films. A novel approach at narrowbanding the delay line was realized through the use of lifted transducers. It is found that the tuning range for single-mode operation is limited primarily by the electrical length of the circuit external to the delay line with frequency jumping occurring everytime this electrical length changed by 360 deg. A maximum tuning range of about 600 MHz was obtained, with this range limited primarily by the AVANTEK GaAs FET amplifier that was used whose electrical length was equivalent to about 45cm of air transmission line. It is concluded that, if the electrical length of the external circuit is sufficiently reduced (ideally made zero), single-mode operation over an octave bandwidth or more is possible. (Author)

Descriptors :   *Microwave oscillators, *Delay lines, *Magnetostatics, Surface waves, Epitaxial growth, Frequency, Transducers, Yttrium iron garnet, Films

Distribution Statement : APPROVED FOR PUBLIC RELEASE