Microwave ring resonator as a novel bio-material moisture sensor
作者： RA Yogi , SA Gangal , RC Aiyer , RN Karekar , None
DOI: 10.1016/S0925-4005(98)00154-3
关键词:
摘要: Abstract A novel miniature microwave microstrip sensor for the study of moisture in bio-materials (paper and leaves) is suggested. The leaf-drying process (time-variation) exhibits leaf-specific nature. paper-moisture estimation using f r Q variations are two complementary sensing methods. useful to sense low level, less than 10% M ww , with sensitivity order 300% −1 an error 1.57% estimated moisture. wider range 0–40% 25 MHz % 2.2% trend percentage both types bio-materials, could be divided broadly regions additional region shown by high containing leaves. preliminary explanation related dominant phenomena attempted.
elsevier.com
sci-hub.se 参考文章(13)
S.G. Ansari, Z.A. Ansari, M.R. Kadam, R.N. Karekar, R.C. Aiyer, The effect of humidity on an SnO2 thick-film planar resistor Sensors and Actuators B-chemical. ,vol. 21, pp. 159- 163 ,(1994) , 10.1016/0925-4005(93)01241-U
Moisture content determination in grain by measuring microwave parameters Measurement Science and Technology. ,vol. 8, pp. 857- 863 ,(1997) , 10.1088/0957-0233/8/8/004
N. Boutin, QAM signal synthesis by time division multiplexing Electronics Letters. ,vol. 27, pp. 1113- 1114 ,(1991) , 10.1049/EL:19910694
Herbert B. Sachse, On the stoichiometry limits in NiO and Fe2O3 Journal of Materials Science. ,vol. 7, pp. 255- 255 ,(1972) , 10.1007/BF02403514
E. Yamashita, R. Mittra, Variational Method for the Analysis of Microstrip Lines IEEE Transactions on Microwave Theory and Techniques. ,vol. 16, pp. 251- 256 ,(1968) , 10.1109/TMTT.1968.1126658
R. Afzalzadeh, R.N. Karekar, Effect of dielectric protecting superstrate on radiation pattern of microstrip patch antenna Electronics Letters. ,vol. 27, pp. 1218- 1219 ,(1991) , 10.1049/EL:19910759
S.M.V. Iyer, R.N. Karekar, Resonance frequency behaviour of microstrip resonators for thin film overlays Electronics Letters. ,vol. 28, pp. 873- 875 ,(1992) , 10.1049/EL:19920551
T. J. Schmugge, T. J. Jackson, H. L. McKim, Survey of methods for soil moisture determination Water Resources Research. ,vol. 16, pp. 961- 979 ,(1980) , 10.1029/WR016I006P00961
W. Meyer, W.M. Schilz, Feasibility Study of Density-Independent Moisture Measurement with Microwaves IEEE Transactions on Microwave Theory and Techniques. ,vol. 29, pp. 732- 739 ,(1981) , 10.1109/TMTT.1981.1130436
R. Afzalzadeh, R.N. Karekar, X-band directive single microstrip patch antenna using dielectric parasite Electronics Letters. ,vol. 28, pp. 17- 19 ,(1992) , 10.1049/EL:19920011