Open AccessReal‐time non‐intrusive RF biochemical sensor
Author(s) -
Pandit Nidhi,
Jaiswal Rahul K.,
Pathak Nagendra P.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2020.1661
Subject(s) - resonator , sensitivity (control systems) , dielectric , microwave , computation , materials science , electronic engineering , acoustics , computer science , optoelectronics , physics , engineering , telecommunications , algorithm
In this Letter, a non‐destructive microwave resonant sensor based on the modified complementary split‐ring resonator has been proposed and analysed with respect to its sensitivity for detecting the aqueous biochemicals. This technique is based on the perturbation theory and only requires to measure resonant frequency and hence, achieving a substantial reduction in the computation time and cost. The proposed sensor is designed to achieve high sensitivity performance with a measured quality factor of the sensor in the bare state, Q B = 631.5, at the centre frequency of f o = 6.31 GHz. The proposed sensor has a maximum sensitivity of S = 6.23 MHz with respect to a unit change in the dielectric constant value. A numerical model is developed for the dielectric constant of the biochemicals as a function of the resonant frequency. The proposed sensor, therefore, provides high sensitivity, simple structure layout and real‐time response with cost effectiveness. The proposed structure can be a potential candidate for the non‐intrusive sensing of aqueous biochemicals.