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A new method of measuring the dielectric constant of liquids and granular materials up to the L-band in the microwave region

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3 Author(s)
de S Rolim, A.L. ; Dep. de Eletronica e Sistemas, Cidade Universitaria, Pernambuco, Brazil ; de Oliveira, A.J.B. ; de Melo, M.T.

This paper describes a new method of measuring the complex relative permittivity ε* of low-loss liquids and granulated materials up to the L-band in the microwave range, based on the six-port technique. The novel feature of this method is the determination of ε* directly from the intersection of three circles in the complex ε*-plane. Furthermore, neither liquids nor granulated materials are used as calibration standards; instead, a matched load and nine adjustable short circuits are employed as standards. The ambiguity usually found in several reported methods is completely eliminated by the already consolidated six-port technique. Results of computer simulations are presented and discussed.

Published in:

Microwave and Millimeter Wave Technology, 2004. ICMMT 4th International Conference on, Proceedings

Date of Conference:

18-21 Aug. 2004