Waveguide cavity perturbation method for measuring complex permittivity of water | Zendy

Mathew K. T. | Zendy; Raveendranath U. | Zendy

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Waveguide cavity perturbation method for measuring complex permittivity of water

Author(s) -

Mathew K. T.,

Raveendranath U.

Publication year - 1993

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.4650060206

Subject(s) - permittivity , waveguide , perturbation (astronomy) , materials science , capillary action , optics , resonant cavity , network analyzer (electrical) , frequency band , acoustics , optoelectronics , physics , electronic engineering , dielectric , engineering , telecommunications , bandwidth (computing) , composite material , laser , quantum mechanics

An accurate method of measuring the complex permittivity of high‐loss liquids like water by use of a waveguide perturbation technique is presented. The sample taken in a thin capillary tube of low‐loss material is inserted in the S‐band waveguide cavity. Resonance frequency and frequency shift are measured with a H. P. network analyzer and the complex permittivity is calculated. This method is particularly useful in the case of high‐loss liquids. Another advantage of this method is that only a very small quantity of liquid is needed for the study. © 1993 John Wiley & sons, Inc.

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