Automated Microwave Dielectric Constant Measurement
Abstract
The tedious and often difficult measurement of dielectric constants as a function of microwave frequency has been simplified using an automated testing apparatus. This automated procedure is based on the use of a slotted line to take measurements. It also includes the automatic application of a numeric solution to a transcendental equation to determine the dielectric constant. The computer program for automation of data acquisition and the overall experimental setup are fully discussed. Experimental data taken using this apparatus are presented in graphic form for porous beds of inerts (including aluminized inerts) and explosives. An equation previously derived in the literature, describing the variation of dielectric constant with density, is used to fit the data. Also, additional applications of this automated apparatus are proposed including the use of this system, and the equation describing the variation of dielectric material mixtures, to estimate the dielectric constant of conductive materials. Keywords include: Dielectric constant, Dielectric constant measurement, Porous bed, Slotted line, Waveguide, and Permittivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1987
- Accession Number
- ADA184182
Entities
People
- Albert Krall
- Brian C. Glancy
Organizations
- Naval Ordnance Laboratory