Analysis of the Complex Dielectric Permittivity Behavior of Composites Based on Al2O3/AlN and Precursor-Derived-SiC in the 1 MHz - 18GHz Frequency Range

reportActive / Technical Report | Accession Number: ADP022434 | Open PDF

Abstract:

The current research involves the synthesis of microwave-absorbing ceramic-based composites which exhibit a controllable variation in complex dielectric permittivity with respect to frequency. In particular, the ability to achieve a controllable non- Debye frequency response which conforms to an inverse power law over several frequency octaves i.e. the real and imaginary components of the dielectric permittivity vary as function-BETA, where function is the frequency and BETA is a controllable coefficient between 0 and 1 is of value, as is the ability to vary the complex permittivity at a given frequency of interest by adjusting the material composition during synthesis. Ultimately, these properties may enable the development of suitable materials for vacuum electronic amplifiers with previously unattainable bandwidth, due to closer synchronism between electromagnetic fields and the electron beam, and enhance power production capabilities, due to improve suppression of spurious oscillations.

Author(s):
Battat, J. ; Calame, J. P.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Descriptive Note:
Conference paper
Supplementary Note:
Presented at the IEEE International Vacuum Electronic Conference (7th) and the IEEE International Vacuum Electron Sources Conference (6th) held in Monterey, CA on 25-27 Apr 2006. Published in the Proceedings of the 2006 IEEE International Vacuum Electronics Conference and 2006 IEEE International Vacuum Electron Sources Conference, p39-40, 2006. ISBN 1-4244-0108-9. This article is from ADA453924 2006 IEEE International Vacuum Electronics Conference held jointly with 2006 IEEE International Vacuum Electron Sources Held in Monterey, California on April 25-27, 2006
Pagination:
0002

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control; JCA_6.1_Information Transport; JCA_6_Net Centric; JCA_8.2.1_Partner with Governments and Institutions; JCA_8.2_Shape; JCA_8_Building Partnerships
Communities of Interest:
Advanced Electronics
Descriptor(s):
*MICROWAVE TUBES, *WAVEGUIDE WINDOWS, DIELECTRIC PROPERTIES, ELECTRON BEAMS, FREQUENCY RESPONSE, ALUMINUM NITRIDES, PERMITTIVITY(ELECTRICAL), ELECTRON TUBE COMPONENTS, SPURIOUS EFFECTS, SILICON CARBIDES, ALUMINUM OXIDES
Field(s)/Group(s):
Electrical and Electronic Equipment
Keyword(s):
COMPONENT REPORTS, DEBYE FREQUENCY
Report Date:
2006 Apr 01
Creation Date:
2006 Sep 27