Spread Spectrum Orthogonal Frequency Coded SAW Tags and Sensors Using Harmonic Operation

Gallagher, D.R.; Gallagher, M.; Saldanha, N.; Pavlina, J.; Malocha, D.C.

doi:10.1109/tmtt.2010.2040347

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The results are summarized in Table II. It was observed that the dependence of temperature was varied from the theoretical value 15,16) by attaching the specimen. The humidity dependence was proportional to the Q factor in Table II.…”

Section: Resultsmentioning

confidence: 99%

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Experimental Study of Highly Sensitive Sensor Using a Surface Acoustic Wave Resonator for Wireless Strain Detection

Bao

Hara

Mitsui

et al. 2012

Jpn. J. Appl. Phys.

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We developed a highly sensitive strain sensor employing a surface acoustic wave (SAW) resonator for a wireless sensing system. The aim of this study is to monitor the distribution of the strain in the earth crust or giant infrastructures, such as bridges, skyscrapers and power plants, for disaster prevention. A SAW strain sensor was fabricated using LiNbO 3 and a quartz substrate, and applied in a tensile test by attaching the steel specimen based on Japanese Industrial Standards (JIS Z2441-1). The results confirmed that the developed sensor could detect a strain of 10 À6 order with linearity. #

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Section: Resultsmentioning

confidence: 99%

“…[16][17][18] In this technique, additional reflectors are integrated into the SAW delay line to identify the sensors. Multiplexing the interrogation using this orthogonalization technique enables us to construct a star-type network of sensors.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Highly Sensitive Sensor Using a Surface Acoustic Wave Resonator for Wireless Strain Detection

Bao

Hara

Mitsui

et al. 2012

Jpn. J. Appl. Phys.

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“…Depending on the sensor configuration selected and the properties of the substance being tested, the conditions under which these various types of sensors can be utilized will vary. The majority of CID configurations find use in bacterial detection [1,2], in liquid detection as a noninvasive sensor in chemical and biological fields [3][4][5], in surface acoustic wave (SAW) sensors [6,7], in the detection of tainted seafood [8], in biosensor applications [9,10], and in the advancement of MEMS fabrication technologies [11]. Several attempts have been made to enhance the sensing capabilities and maximum field penetration depth (PD) and to estimate the capacitance value of the CID sensor by altering its geometrical configurations [12,13].…”

Section: Introductionmentioning

confidence: 99%

Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

Khan

2023

Sensors

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Capacitive sensors that utilize the Coplanar Interdigitated (CID) electrode structure are widely employed in various technical and analytical domains, such as healthcare, infectious disease management, pharmaceuticals, metrology, and environmental monitoring. The present exigency for lab-on-a-chip contrivances and the requisite for the miniaturization of sensors have led to the widespread adoption of CID sensors featuring multiple dielectric layers (DLs), either in the form of substrates or superstrates. Previously, we derived an analytical model for the capacitance of CID capacitive sensors with four distinct 1-N-1 patterns (namely, 1-1-1, 1-3-1, 1-5-1, and 1-11-1) using partial capacitance (PC) and conformal mapping (CM) techniques. The aforementioned model has been employed in various applications wherein the permittivity of successive layers exhibits a monotonic decrease as one moves away from the electrode plane, resulting in highly satisfactory outcomes. Nevertheless, the PC technique is inadequate for structures with multiple layers where the permittivity exhibits a monotonic increase as the distance from the electrodes increases. Given these circumstances, it is necessary to adapt the initial PC method to incorporate these novel configurations. In this work, we have discussed a new approach, splitting the concept of PC into partial parallel capacitance (PPC) and partial serial capacitance (PSC), where new CM transformations are proposed for the latter case. Thus, the present study proposes a novel methodology to expand upon our prior analytical framework, which aims to incorporate scenarios where the permittivity experiences a reduction across successive layers. The outcomes are juxtaposed with the finite element simulation and analytical findings.

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Wireless RFID/sensor network using SAW (WiRSeNS): A feasibility study

Jeoti

Nawaz

2015

2015 3rd International Conference on Signal Processing, Communication and Networking (ICSCN)

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Spread Spectrum Orthogonal Frequency Coded SAW Tags and Sensors Using Harmonic Operation

Cited by 8 publications

References 6 publications

Experimental Study of Highly Sensitive Sensor Using a Surface Acoustic Wave Resonator for Wireless Strain Detection

Experimental Study of Highly Sensitive Sensor Using a Surface Acoustic Wave Resonator for Wireless Strain Detection

Expansion of the Analytical Modeling of Capacitance for 1-N-1 Multilayered CID Structures with Monotonically Increasing/Decreasing Permittivity

Wireless RFID/sensor network using SAW (WiRSeNS): A feasibility study

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