Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	Dielectric Properties of Certain Biological Materials at Microwave Frequencies [PDF]
AUTHORS	S. Biju Kumar, K.T. Mathew, U. Raveendranath and P. Augustine 2001 36 2 67-75
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Abstract In the medical field, microwaves play a larger role for treatment than diagnosis. For the detection of diseases by microwave methods, it is essential to know the dielectric properties of biological materials. For the present study, a cavity perturbation technique was employed to determine the dielectric properties of these materials. Rectangular cavity resonators were used to measure the complex permittivity of human bile, bile stones, gastric juice and saliva. The measurements were carried out in the S and J bands. It is observed that normal and infected bile have different dielectric and loss tangent. Dielectric constant of infected bile and gastric juices, varies from patient to patient. Detection and extraction of bile stone with possible method of treatment is also discussed. Key Words: Biological materials, permittivity, cavity resonators, perturbation technique