Accession Number:

ADA184182

Title:

Automated Microwave Dielectric Constant Measurement

Descriptive Note:

Technical progress rept. Feb 1985-Jan 1986

Corporate Author:

NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD

Personal Author(s):

Report Date:

1987-03-01

Pagination or Media Count:

41.0

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.

Subject Categories:

  • Computer Programming and Software
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE