Sensor-Integrated Aperture Coupled Patch Antenna

A Novel Sensor-Integrated Aperture Coupled Microwave Patch Resonator for Humidity Detection

“…In this paper, an IDC sensing element is integrated into an ACP antenna for the first time and its performance as a humidity sensor is investigated. Preliminary design of an IDC coated with barium titanate-based sensing material, which forms the basis for sensor integration with the ACP antenna, has been presented in the conference proceeding [35]. This article is an extended version of this work.…”

Doping‐induced diffused phase transition triggers gas‐sensing performance of Sn‐doped BaTiO3 nanostructures

“…It was found that a very small number of reports are available on the work based on BaTiO 3 as a functional material for gas-sensing application. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] The ferroelectric properties in ABO 3 -type perovskite material are governed mainly due to B site and oxygen atom hybridization. The properties of the ABO 3 -type ceramics such as BaTiO 3 can be successfully manipulated by Ba or Ti site doping.…”

Characterization and Neural Modeling of a Microwave Gas Sensor for Oxygen Detection Aimed at Healthcare Applications

“…[ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], as well as in therapeutic applications [ 14 , 15 ]. In recent years, various sensors based on microwave devices have been developed to be used for gas sensing purposes [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]. Compared to their conventional counterparts based on resistive, capacitive, and amperometric effects [ 18 ], sensors based on microwave transducers show better performance, i.e., they have lower power consumption, a shorter response time, and a lower operating temperature [ 16 , 18 , 19 , 20 , 21 , 22 ].…”

“…A low-cost electronic interface can be developed for such sensors with an accurate resonant frequency estimation [ 39 , 40 , 41 , 42 ]. Moreover, they can be easily integrated into antennas, thereby being compatible with wireless technologies [ 25 , 26 , 43 ]. It is worthy of note that, through integration with microfluidic channels, microwave sensors can also allow dielectric characterization of biological liquids [ 44 , 45 , 46 , 47 , 48 ].…”

“…Therefore, the changes in the target gas concentration influence the changes in the electrical response of the sensor. Often, the propagative structure is realized in the microstrip technology, such as microstrip patch antennas [ 24 , 25 , 26 ], microwave resonators [ 20 , 27 , 28 , 29 , 30 , 31 , 32 ], and other microstrip structures [ 35 , 36 ]. Among the various exploited structures, sensors based on the use of interdigital capacitors (IDCs) as propagative structures have been proposed [ 30 , 37 ].…”