Welcome to JENT its Monday 22nd of January 2018

Journal of Environmental Nanotechnology

(A Quarterly Peer-reviewed and Refereed International Journal)
ISSN(Print):2279-07 48; ISSN(Online):2319-5541
CODEN:JENOE2

Effect of Frequency and Moisture Variation on Dielectric Properties of Pearl Millet in Powder Form

Abstract

Values of dielectric constant (ε’ ), dielectric loss (ε’’), relaxation time (τ), conductivity (σ) of
Pearl millet (HHB 62) were measured at room temperature at four different frequencies viz 4.65 GHz,
7.00 GHz, 9.35 GHz and 14.98 GHz in microwave region, using two point method and employing a
specially designed dielectric cell for powders. Also, effect of variation of moisture content on dielectric
properties of Pearl millet in powder form was studied at room temperature at 9. 35 GHz.. Both, the
dielectric constant and loss factor are found to decrease with increase in frequency and to increase with
increase in moisture content. The present values of dielectric constant are in good agreement with the
values reported by other authors.

Article Type: Orginal Research Article

Corresponding Author: Nidhi Bhargava 1  

Email: nidbhargava@gmail.com

Nidhi Bhargava 1*,  Ritu Jain 2,  Ila Joshi 3,  K.S. Sharma 4.  

1, 2, 4. Department of Physics, The IIS University, SFS, Gurukul Marg, Mansarovar, Jaipur, India.

3. Department of Home Science, The IIS University, SFS, Gurukul Marg, Mansarovar, Jaipur, India.

J.Environ. Nanotechnol., Volume 2, (2013) pp. 01-05
ISSN: 2279-0748 eISSN: 2319-5541
Download Citation

Reference

Behari, J., Microwave Dielectric Behaviour of Wet Soil , Springer. 43, (2005).

Guo, W., Tiwari, G., Tang J. and Wang, S., Frequency, Moisture and Temperature-
Dependent Dielectric Properties of Chickpea flour, “Biosystems Engineering”, 101, 217-224,
(2008).http://dx.doi.org/10.1016/j.biosystemseng.2008.07.002

Hippel, A. R.V., Hippel, Dielectric Materials and Applications, The Technology Press of M.I.T.
and John Wiley and Sons, Inc.,. New York, (1954).

Komarov, V., Wang, S., Tang, J., Permittivity and Measurement. In: Chang, K.(Ed.), The Wiley Encyclopedia of RF and Microwave Engineering, vol. 4. John Wiley Sons, Inc., New
York, 3693–3711 (2005).http://dx.doi.org/10.1002/0471654507.eme308

Nelson, S. O., Measurement and Applications of Dielectric Properties of Agricultural Products, IEEE Trans. Instrum. Measur., 41, 116, (1992).http://dx.doi.org/10.1109/19.126644

Nelson, S.O., Kraszewski, A.W., Kandala, C.V.K., and Lawrence, K.C., High-frequency and
Microwave Single-Kernel Moisture Sensors, “Trans. ASAE”, 35 (4), 1309–1314, (1992).http://dx.doi.org/10.13031/2013.28734

Nelson, S.O., Dielectric spectroscopy in agriculture, “J. Non. Cryst. Solids”, 351, 33-36, 2940– 2944, (2005).http://dx.doi.org/10.1016/j.jnoncrysol.2005.04.081

Sharma, K., Jain, R., Bhargava, N., Sharma, R., and Sharma, K.S., Dielectric Studies of Wheat in Powder form at Microwave Frequencies, “India J. Exp. Biol.”, 48 (10), 1002-7, (2010).

Venkatesh, M.S. and Raghavan, G.S.V., An overview of microwave processing and dielectric
properties of Agri-food materials ”Biosystems Engineering”, 88(1), 1-18, (2004).http://dx.doi.org/10.1016/j.biosystemseng.2004.01.007

Yadav, J.S. and Gandhi, J.M., Simple Microwave Technique for Measuring the Dielectric
Parameters of Solids and their Powders, Indian J. Pure App. Phy., 30 ,427 -431, (1992).