Accession Number : AD1023336


Title :   Development of Metamaterial Composites for Compact High Power Microwave Systems and Antennas


Descriptive Note : Technical Report


Corporate Author : University of Missouri-Columbia Center for Physical and Power Electronics Columbia United States


Personal Author(s) : Curry,Randy D ; O'Connor,Kevin A ; Pearson,Aric M ; Noel,Kelli M ; Mounter,Sarah


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1023336.pdf


Report Date : 01 May 2016


Pagination or Media Count : 103


Abstract : During the period of performance we investigated the electrical and mechanical properties of two types of ferrite metamaterials: ferrite-based composites and core-shell composites. Both were fabricated using advanced polymer composite techniques and then characterized. The measurements were compared to models and the analysis is presented in this report. The ferrite-based composites consist of combining a ferrite powder with a silane binder and pressing them together following a mixing operation. These composites are easily manufactured in bulk and their properties can be tailored to specific wave impedance requirements. In the other approach, the core-shell composites are formed by chemically depositing a barium titanate (BaTiO3) shell around a ferrite core to form a composite of small beads of ferrite surrounded by insulating BaTiO3. Both metamaterials were then fabricated into test coupons and the electrical properties were investigated. Investigations of electrical properties included: studies of real and imaginary permeability of the composite materials; studies of real and imaginary permittivity of the composites; electrical breakdown strength of the composites.


Descriptors :   composite materials , METAMATERIALS , MICROWAVE EQUIPMENT , antennas , FERRITES , mechanical properties , ELECTRICAL PROPERTIES , fabrication , BREAKDOWN (ELECTRONIC THRESHOLD) , voltage , surfaces , materials processing , dielectrics , electron microscopy , SPECTROSCOPY , MAGNETIC PERMEABILITY , thickness


Subject Categories : Miscellaneous Materials
      Laminates and Composite Materials
      Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE