High‐precision dielectric sensor system based on balanced CSRR‐SIW resonators

Abstract

A high-precision differential microwave dielectric sensor system based on a pair of CSRR-SIW resonators is introduced. The proposed method consists of four parts: the frequency-sweeping signal source, the balanced sensor based on CSRR-SIW, the RMS power detector, and the data acquisition system. Without a vector network analyzer (VNA) and other instruments, the electromagnetic properties of materials can be measured conveniently with the proposed method. In this work, two CSRR resonators inside SIW cavities are used as the balanced RF sensing components, one for measurement and the other for ref-

Permittivity measurement of fluidics with high‐sensitivity by chandelier form microwave sensor

“…The examples identified by the permittivity determination method include blood glucose, [21][22][23] moisture, [24][25][26][27] milk, 28 oil in food, 29 solution of sugar and salt, 30 amount of nitrate and phosphate. 31 The cavity technique is a method for researchers in the petroleum industry, therefore, the used MRSs in the industry can be fabricated by cavity model [32][33][34] or the amount of fat and impurities in types of milk was detected by the substrate-integrated waveguide structure. 35,36 Serialization of several MRS increases sensitivity.…”

“…The cavity technique is a method for researchers in the petroleum industry, therefore, the used MRSs in the industry can be fabricated by cavity model 32–34 or the amount of fat and impurities in types of milk was detected by the substrate‐integrated waveguide structure 35,36 . Serialization of several MRS increases sensitivity.…”

Microwave Split Ring Resonator Sensor for Determination of the Fluids Permittivity With Measurement of Human Milk Samples

“…Or they can sense two materials such as both solid and fluid (Silva et al., 2021; Velez et al., 2021), also the sensors sense several variables however they are called multivariable sensors (Baghelani et al., 2020) or have several frequency bands that are called multiband sensors (Bakır et al., 2018; Dalgac et al., 2021). There are techniques to design including interdigital and mender structure (Kiani, Rezaei, Karami, & Sadeghzadeh, 2018; Kiani, Rezaei, Navaei, & Abrishamian, 2018; Krishnan & Saraswathyamma, 2021), substrate integrated waveguide (Kiani, Rezaei, Karami, & Sadeghzadeh, 2018; Kiani, Rezaei, Navaei, & Abrishamian, 2018), parallel coupling (Kiani, Rezaei, Karami, & Sadeghzadeh, 2018; Kiani, Rezaei, Navaei, & Abrishamian, 2018), planar open‐loop resonator (Aquino et al., 2021), phase‐variation microwave sensor (Su et al., 2021), split ring resonator (SRR) (Kiani et al., 2020), complementary SRR (Jiang et al., 2021; Soltan et al., 2020; Stuchly et al., 1974; Viswanathan et al., 2020), time domain measurement (Erdogan et al., 2020) and discontinuous parallel‐plate waveguide (Valagiannopoulos., 2011), such structure indicates highly selective treatment, in this paper have been used from semi‐analytical method of mode matching. A variety of methods have been created to improve sensitivity and Q‐factor (Kiani, Rezaei, Karami, & Sadeghzadeh, 2018; Kiani, Rezaei, Navaei, & Abrishamian, 2018).…”