Note: Series and parallel tunable resonators based on a nematic liquid crystal cell as variable capacitance

Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments (2012), 83 (8). and may be found at http://dx.doi.org/10.1063/1.4738645In this work, tunable series and parallel resonators based on a nematic liquid crystal cell as variable capacitance are proposed and characterized. Tunable resonance frequencies in the range of kHz have been obtained for the combination of the inductance and the liquid crystal cell (capacitance) used in the proposed circuits. Tuning range in frequency obtained is around an octave.This work was supported in part by the Spanish Ministry of Science and Technology (TEC2009- 13991-C02-01) and the Comunidad de Madrid (FACTOTEM2-CM, REF.S2009/ESP- 1781).Publicad