Planar Microwave Sensors for Complex Permittivity Characterization of Materials and Their Applications

Saeed, K.; Shafique, Muhammad Farhan; Byrne, Matthew B.; Hunter, I.C.

doi:10.5772/36302

Cited by 47 publications

(22 citation statements)

References 41 publications

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“…In this method, the material to be measured was placed inside the cavity in an aperture and its dielectric properties were derived from the changes inside the cavity, by using conversion equations [31,32]. The changes in the cavity's resonant frequency and quality factor were caused by the insertion of the sample.…”

Section: Resonant Perturbation Methodsmentioning

confidence: 99%

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Ibanez‐Labiano

Alomainy

2020

Materials

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Seamless integration of electronics within clothing is key for further development of efficient and convenient wearable technologies. Therefore, the characterization of textile and fabric materials under environmental changes and other parametric variations is an important requirement. To our knowledge, this paper presents for the first time the evaluation of dielectric characterization over temperature for non-conductive textiles using resonating structures. The paper describes the effects of temperature variations on the dielectric properties of non-conductive fabrics and how this can be derived from the performance effects of a simple microstrip patch antenna. Organic cotton was chosen as the main substrate for this research due to its broad presence in daily clothing. A dedicated measurement setup is developed to allow reliable and repeatable measurements, isolating the textile samples from external factors. This work shows an approximately linear relation between temperature and textile’s dielectric constant, giving to fabric-based antennas temperature sensing properties with capability up to 1 degree Celsius at millimeter-wave frequencies.

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Section: Resonant Perturbation Methodsmentioning

confidence: 99%

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Ibanez‐Labiano

Alomainy

2020

Materials

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“…A conventional practice at employment of microwave resonators involves using standard microwave waveguides as feeding system. Waveguides, however, are relatively bulky; therefore, feeding microwave sensors by miniaturized microstrip lines or coplanar waveguides becomes more popular [ 46 ]. To a pity, the width of the wave path in microstrip lines and coplanar waveguides, however, is relatively narrow that can create problems for resonator excitation.…”

Section: Designing and Prototyping Sensing Devices With Implementementioning

confidence: 99%

Sensing Based on Fano-Type Resonance Response of All-Dielectric Metamaterials

Semouchkina

Duan

Semouchkin

et al. 2015

Sensors

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A new sensing approach utilizing Mie resonances in metamaterial arrays composed of dielectric resonators is proposed. These arrays were found to exhibit specific, extremely high-Q factor (up to 15,000) resonances at frequencies corresponding to the lower edge of the array second transmission band. The observed resonances possessed with features typical for Fano resonances (FRs), which were initially revealed in atomic processes and recently detected in macro-structures, where they resulted from interference between local resonances and a continuum of background waves. Our studies demonstrate that frequencies and strength of Fano-type resonances in all-dielectric arrays are defined by interaction between local Mie resonances and Fabry-Perot oscillations of Bloch eigenmodes that makes possible controlling the resonance responses by changing array arrangements. The opportunity for obtaining high-Q responses in compact arrays is investigated and promising designs for sensing the dielectric properties of analytes in the ambient are proposed.

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“…In particular, we assume that thin samples of the material are available which can be placed as transmission line segments in the configuration in Figure 11(a) or interrogated directly in free space in the normal incidence electromagnetic counterpart in Figure 11(b). These setups are practical, see, e.g., the review in [11]. They can be implemented either as a multi-frequency sweep or using pulses and transforming to the frequency domain for processing.…”

Section: Examplesmentioning

confidence: 99%

Optical Theorem for Transmission Lines

Marengo¹,

Tu²

2014

PIER B

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Abstract-We present the application to transmission line systems of a new theory of the optical theorem that describes the energy budget of electromagnetic scattering in lossless wave propagation media. The insight gained by exploring this, simplest of the electromagnetic wave propagation systems from the point of view of the optical theorem, is important for understanding power budget of electromagnetic scattering due to the presence of targets in a medium, and of changes of loads due to parasitics, faults, switching, and other reasons, in transmission lines, with applications to quality control in manufacturing, self-monitoring of microwave circuits, and the detection of load changes and faults in power transmission and distribution systems. The results also apply to more general electromagnetic propagation systems and are relevant for the development of novel electromagnetic (e.g., microwave, terahertz) and optical sensors.

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Planar Microwave Sensors for Complex Permittivity Characterization of Materials and Their Applications

Cited by 47 publications

References 41 publications

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Dielectric Characterization of Non-Conductive Fabrics for Temperature Sensing through Resonating Antenna Structures

Sensing Based on Fano-Type Resonance Response of All-Dielectric Metamaterials

Optical Theorem for Transmission Lines

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