Relaxation Study at Microwave Frequency Using Time Domain Reflectometry

Dr. S. R. Chaudhari, Dept. of Physics, B.G. College, Sangvi, Pune, India.
Manuscript received on September 11, 2013. | Revised Manuscript received on September 15, 2013. | Manuscript published on September 25, 2013. | PP: 27-31 | Volume-1, Issue-11, September 2013. | Retrieval Number: K04700911113/2013©BEIESP

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Abstract: The dielectric relaxation study at microwave frequency gives information about solute(Methanol)–solvent (Balantkadha)-interaction and liquid structure of mixture. The objective of the present paper is to report the dielectric relaxation study of above system using Time Domain Reflectometry (TDR) in the temperature range 150C to 450C.The information related to the solute-solvent interaction has been carried out related to the static dielectric permittivity and relaxation time in the mixture of Ayurvedic Medicine-Balantkadha and Methanol. Dielectric relaxation study of Balantkadha used in Gynaec problems has been carried out at 150C, 250C, 350C and 450C in the frequency range 10 MHz to 20 GHz for 11 different concentrations of the system. Time Domain Reflectometry (TDR) Technique in reflection mode has been used to measure dielectric parameters viz. Dielectric loss ( ), Static dielectric permittivity ( 0) and relaxation Time ( ). Further, Fourier transforms and least square fit method has been used to obtain dielectric parameters. With change in concentration and temperature, the systematic changes in dielectric parameters are observed.
Keywords: Dielectric loss, Permittivity, Relaxation time, Time domain Reflectometry.