CST – Computer Simulation Technology

Coupled ring resonator for microwave characterization of dielectric materials
Mahima Kapoor, K. S. Daya, G. S. Tyagi
International Journal of Microwave and Wireless Technologies
16 November 2011
Dielectric constant, Ring resonator, Resonant frequency
In this paper characterization of dielectric materials in liquid and powder phase using concentric closed and split ring resonators of length l, l/2, and l/4 is reported. Experimental results have been validated by simulations and theoretically modeling. Sensitivity of the resonator with closed rings was maximum. Experimentally extracted values of dielectric constant of ferrite ranged from 14.05 to 15.1 with closed ring resonators and from 13.6 to 14.02 with split ring resonator, respectively. For spirulina platensis the dielectric constant was lying in the range 1.78–1.93 and 1.74–2.04 with closed ring and split ring resonators, respectively. The values extracted experimentally are in good agreement with simulation and theoretically found values. However, the values obtained from closed ring resonator were in agreement with the dielectric constant values of ferrite and spirulina platensis.

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