Accession Number : AD0889393

Title :   Ferrite/Dielectric Composite Integrated Microwave Circuits Development.

Descriptive Note : Final rept. 15 Mar 70-15 Nov 71,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OH DAYTON LAB

Personal Author(s) : Harris, Douglas H. ; Rosenbaum, Fred J. ; Aumiller, Charlton G.

Report Date : NOV 1971

Pagination or Media Count : 144

Abstract : Ferrite/dielectric composite substrates, fabricated by arc-plasma-spray methods, were investigated as substrates for high power ferrite phase shifters in integrated circuit configurations. Theoretical studies treated the subject as a parallel plane waveguide filled with the composite medium. Three separate cases were prepared for each of the three (x, y, and z) directions of magnetization. Similar results were found in all three cases which pointed to lower theoretical attenuation but at a sacrifice to phase shifter figure of merits. The characteristic impedance was found to exhibit a region of cutoff which can be modified through control of the geometry and electromagnetic parameters. The minimal thickness of ferrite at which useful interaction could be obtained was found to be 25% of the total composite thickness. Experimental data has verified the theoretical treatise of composite parameters using meander line, meander strip line, slot line, and coplanar waveguide structures. Trade-offs were found between high power and figure of merits for all cases, but the best structure appeared to be co-planar waveguide in which 1 kW peak power at 140 degrees /dB F.O.M. was typical. (Author)

Descriptors :   *INTEGRATED CIRCUITS), (*PHASE SHIFT CIRCUITS, SUBSTRATES, FERRITES, DIELECTRICS, STRIP TRANSMISSION LINES, PROPAGATION, WAVEGUIDES, MANUFACTURING.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE