Open AccessModified planar sensor for measuring dielectric constant of liquid materials
Author(s) -
Karami M.,
Rezaei P.,
Kiani S.,
Sadeghzadeh R.A.
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2017.2481
Subject(s) - permittivity , planar , relative permittivity , resonator , materials science , sensitivity (control systems) , dielectric , resonance (particle physics) , air gap (plumbing) , spiral (railway) , optoelectronics , acoustics , electronic engineering , physics , engineering , computer science , atomic physics , composite material , computer graphics (images) , mechanical engineering
A planar U‐shaped resonator for measuring relative permittivity of the liquid mediums is developed. To improve the sensitivity of the proposed sensor, gap sections, coupled lines and central ring resonators (RRs) are used to enhance electric fields interact with liquid under test (LUT). Further to increase the resonance sharpness, a tapered double‐sided spiral split RR is presented. As the permittivity of the LUT is increased from 26 to 79, the measured resonance frequency of the described sensor is varied in the 166.4–287.5 MHz range. The developed sensor exhibits an improvement in sensitivity of about 45% compared with the other work.