PRODUCTION ENGINEERING MEASURE YIG SPHERES AND LIMITERS.
Quarterly progress rept. no. 6, 29 Aug-29 Nov 64,
SPERRY RAND CORP CLEARWATER FLA SPERRY MICROWAVE ELECTRONICS DIV
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The yield and quality of spheres have been enhanced by a rearrangement of sphere forming and polishing equipment and by implementing a new sphere handling technique. The temperature stability study has established the material basic characteristic necessary for L-band operation at -55 degrees C, and revealed parameters responsible for the temperature instability. Preliminary preproduction testing on limiters in all bands has been completed and units are ready for final tests. Three batches of pure YIG and six batches of substituted YIG material were fired and evaluated. A new process, consisting of adding presintered garnet power in place of the yttrium and iron oxides, was used to obtain better mixing of the single crystal ingredients. Author