In SITU Measurement of the Dielectric Properties of Ceramics with a Single Mode Microwave Heating Device,
Abstract
A single mode microwave heating device which operates at 2.45 GHz was modified to simultaneously heat and characterize ceramic materials. The equivalent circuit derived by Marcuvitz 9 to model the ceramic rod in the waveguide was used in the formulation. Three crystal detectors on the impedance analyzer were used as a reflectometer to measure the reflection coefficient of the load, so that transmission line measurements can be automated. The measured reflection coefficient at different temperature is a function of the dielectric constant and loss tangent of the ceramic material. The Newton-Raphson method was successfully used to solve a nonlinear complex equation. By using this system, a 94% alumina rod was heated and characterized and experimental results are presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 27, 1992
- Accession Number
- ADP007738
Entities
People
- D. Ghodgaonkar
- V. K. Varadan
- V. V. Varadan
- X. D. Yu
Organizations
- Pennsylvania State University