Accession Number:

ADA164195

Title:

Advanced Artificial Dielectric Materials for Millimeter Wavelength Applications. Part A

Descriptive Note:

Annual technical rept. 1 Aug 1984-30 Sep 1985

Corporate Author:

GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER

Personal Author(s):

Report Date:

1985-12-30

Pagination or Media Count:

36.0

Abstract:

This is Part A of a two-part Annual Report. Part B, dealing with magneto-dielectrics, is classified. This part describes a continuation of work on artificial dielectric composites based on a polymeric binder and alloy powder particles that are oxide-coated for isolation and ferromagnetic below room temperature for packing determination. Characterization studies show the surface oxide on the alloy powder. Microstructural study of the composites shows wide variations in local packing density, characteristic of random loading. Permittivity measurements extended to 35 GHz correlate qualitatively with modern theories of heterogeneous media but evidence deviations that may arise from the observed clumping. Higher frequency measurements of permittivity and induced permeability are under way. An alternative inorganic binder material and process with higher dielectric constant has been developed with properties suitable for the morphological, electromagnetic, and mechanical requirements. Keywords include Artificial dielectrics, properties of heterogeneous media fine powder preparation and characterization, and permittivity and induced permeability.

Subject Categories:

  • Metallurgy and Metallography
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE