Substrate Integrated Waveguide Phase Shifter for Hydrogen Sensing

Band‐stop filter sensor based on SIW cavity for the non‐invasive measuring of blood glucose

“…In recent years, the microwave planar sensors have been employed to measure the dielectric properties of liquid, gas and solid materials. Different methods are used for designing the microwave sensor such as the resonance based and wideband sensing [1][2][3][4][5][6]. The resonator sensor has the advantages of real-time sensing, direct detection, miniaturised size, convenience and label-free characterisation [7].…”

Microwave Surface Plasmon Polariton-Like Sensor Based on Half-Mode Substrate Integrated Waveguide for Highly Sensitive Dielectric Constant Detection

“…Moreover, microwave circuitry can be readily fabricated in printed-circuit board (PCB) technology and easily integrated, which make them favorable when it comes to requirements for compactness and cost-effective fabrication. Thus, microwave sensors have been utilized in various applications including dielectric constant sensing [1][2][3][4][5][6][7][8][9][10][11][12], food quality control [13,14], gas sensing [15][16][17], glucose detection [18,19], microwave imaging [20], and concentration measurements of N.C., Z. S., V. CB., V. R. and N. J. are with Nano and Microelectronics Group, BioSense Institute, University of Novi Sad (cselyu@biosense.rs (C.N.…”

A Microwave Microfluidic Sensor Based on a Dual-Mode Resonator for Dual-Sensing Applications

“…Also, microwave structures can be readily implemented in the integrated circuits, which have become a favourable platform due to their constantly decreasing cost. As such, microwave sensors have found numerous applications including permittivity sensing [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ], strain and displacement sensing [ 16 , 17 , 18 , 19 , 20 ], detection of biomolecules [ 21 ], glucose monitoring [ 22 , 23 ], dielectric spectroscopy for food quality control [ 24 , 25 ], gas sensing [ 26 , 27 , 28 ], and concentration measurements of liquid solutions [ 29 ].…”

“…The operating principles of the proposed microwave sensors predominantly rely on the resonance concept [ 4 , 5 , 6 , 7 , 9 , 10 , 12 , 14 , 15 , 16 , 19 , 20 , 21 , 23 , 29 ], however there are also structures based on transmission line [ 1 , 2 , 18 , 26 , 27 , 28 ] and capacitive methods [ 13 , 17 , 22 ], as well as on more peculiar phenomena such as energy tunneling [ 3 , 11 ] and metasurfaces [ 8 ]. Besides split ring resonators (SRR) [ 4 , 9 , 14 , 15 , 16 , 19 , 20 , 21 ], which have been widely exploited in resonant-type sensors, there have also been proposed sensors with cavity [ 6 , 29 ] and stepped impedance resonators (SIR) [ 5 , 7 ].…”

“…Besides split ring resonators (SRR) [ 4 , 9 , 14 , 15 , 16 , 19 , 20 , 21 ], which have been widely exploited in resonant-type sensors, there have also been proposed sensors with cavity [ 6 , 29 ] and stepped impedance resonators (SIR) [ 5 , 7 ]. As for the transmission line-based sensors, the majority of them have been realized using the substrate integrated waveguide (SIW) [ 27 ], coplanar waveguide (CPW) [ 18 , 26 , 28 ], microstrip with electromagnetic bandgap (EBG) structures [ 2 ] and microstrip differential lines [ 1 ], whilst capacitive sensors have been realized as a gap [ 13 ], plate [ 17 ] or interdigital [ 22 ] capacitor in microstrip configurations.…”