Accession Number:

AD0263394

Title:

MICROWAVE APPLICATION OF FERRITES. PART II. EQUIVALENT CIRCUIT OF THE FERRIMAGNETIC AMPLIFIER. EXPERIMENTAL PROGRAM. GROWTH OF YTTRIUM IRON GARNETS

Descriptive Note:

Corporate Author:

SYRACUSE UNIV N Y

Personal Author(s):

Report Date:

1961-08-16

Pagination or Media Count:

1.0

Abstract:

The equivalent circuit of a ferrimagnetic amplifier was derived from first principles. The result is obtained by a perturbational procedure and applies directly to electromagnetic operation of the amplifier only. It can, however, also be used for the modified semi-static operation. The experimental program was directed toward reduction of pump power requirements in the operation of parametric amplifiers using single yttrium iron garnet YIG crystals as the active element. This aim was achieved only partially. Pump power levels were reduced to about 2 watts with some amplifier configurations. This is somewhat short of the goal to reduce threshold levels to powers below 1 watt which might bring this type of amplifier within a practical range. Growing methods and results are presented for single crystal yttrium-iron garnet crystals. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE