Analysis of the Complex Dielectric Permittivity Behavior of Composites Based on Al2O3/AlN and Precursor-Derived-SiC in the 1 MHz - 18GHz Frequency Range
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2006
- Accession Number
- ADP022434
Entities
People
- J. Battat
- J.P. Calame
Organizations
- United States Naval Research Laboratory