HIGH POWER MICROWAVE FERRITES AND DEVICES.

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Abstract:

The theory of spin-wave generation in nonuniform magnetic fields is reviewed. Detailed theoretical results concerning the photon-magnon conversion, the magnonphonon conversion, the frequency- and field-dependence of the delay time, and the insertion loss are presented. A general theory of the nonuniform demagnetizing field of nonellipsoidal samples is described. Experimental results concerning the field dependence of the delay time are presented both for the case in which the spin waves generated are exchange dominated and the case in which they are dominated by the magnetostatic interaction. The power handling capability of circulators and phase shifters in rectangular waveguide is analyzed. The development of a high power S-band material is described. Approximately 130 different garnet compositions containing Y, Gd, Fe, Al, In and a strongly relaxing rare earth ion such as Dy, Ho or Tb have been investigated. The development of an S-band high-power ferrite circulator is described.

Author(s):
Schlomann, E. ; Green, J. J. ; Saunders, J. H. ; Maguire, E. A. ; Paladino, A. E.
Author Organization(s):
RAYTHEON CO WALTHAM MASS RESEARCH DIV
Descriptive Note:
Final rept. for 1 Jan 63-31 Dec 64,
Supplementary Note:
Continuation of Contract DA36 039SC85372.
Annotation:
High power microwave ferrites and devices.
Pagination:
0154

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
R-8, S-742
Contract/Grant Number(s):
DA36 039AMC00064E
Task Number(s):
1C024401A11202
Project Number(s):
1C024401A112 3A99 15 006
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.2_Non-Kinetic Means
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
(*FERRITES, WAVEGUIDE CIRCULATORS), (*WAVEGUIDE CIRCULATORS, MICROWAVE EQUIPMENT), (*MICROWAVE EQUIPMENT, FERRITES), S BAND, PHASE SHIFT CIRCUITS, EXCITATION, DELAY LINES, GARNET, MAGNETIC FIELDS, PHOTONS, PHONONS, FERROMAGNETIC MATERIALS
Report Date:
1964 Dec 31