Reference-Incorporating Microwave Resonator-Based Sensors for Biological Sensing Applications

Camli, Berk; Torun, Hamdi; Dündar, Günhan; Yalçınkaya, Arda Deniz

doi:10.3390/proceedings1040542

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…In this work loop antennas were used for resonator actuation, in contrast to monopole antennas used in our previous work [6]. Incorporation of loop antennas surrounding SRRs increases the actuation efficiency reduces the number of ports in the antenna end, while providing clearer reading spectra.…”

Section: Discussionmentioning

confidence: 99%

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Loop Antenna Driven Double Microwave Resonator-Based Sensors Incorporating PDMS Microchannels on Glass Substrates

et al. 2018

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Microwave resonator-based sensors offer low-cost, contactless, label-free sensing solutions in a variety of applications. Sensing is done by the observation of the shifts in resonant frequency of the sensor structure, which depends on resonator geometry, material and physical properties of the environment. It is observed that the readings can be significantly affected by changes in secondary physical parameters or sample localization on resonator. A double microwave resonator sensing system incorporating microchannels on glass substrates are proposed to address these challenges. PDMS microchannels bonded on glass substrates are mounted on split ring resonators fabricated via low-cost processes. Experiments are performed with glucose solutions of 1.4 mg/mL–3.0 mg/mL concentration range. Results confirm that the use of double resonators increase rejection of background noise, whereas microchannel use increases measurement stability. Overall measurement sensitivity is shown to be 0.92 MHz/(mg/mL). Further improvements are aimed with the bonding of microchannels directly on resonators fabricated on glass substrates.

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Section: Discussionmentioning

confidence: 99%

“…Additionally, the sample volume and its localization on the resonator surface should be controlled precisely since f0 tracking is sensitive to changes in these. A double measurement-based system relying on real-time comparison of one measuring and one reference resonator was demonstrated previously to address the former issue [6].…”

Section: Introductionmentioning

confidence: 99%

Loop Antenna Driven Double Microwave Resonator-Based Sensors Incorporating PDMS Microchannels on Glass Substrates

et al. 2018

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“…Microwave resonators are one of the key components of communication, radar, and sensing systems. They have been broadly used in microwave filters, oscillators, and tuned amplifiers in communication and radar transceivers and have been largely utilized in sensors for different purposes such as material characterization [1]- [4], defect detection [5], chemical analysis [6], bio-sensing [7], qubit readout for quantum information processing [8], [9], motion control [10], and ambient monitoring [11]. There is also an emerging interest in microwave resonator-based sensors within the framework of the internet of things [12].…”

Section: Introductionmentioning

confidence: 99%

A Low-Complexity Time-Domain Method for a Fast and Accurate Measurement of Q-Factor and Resonant Frequency of RF and Microwave Resonators

Akbar

Yektakhah

et al. 2021

IEEE Access

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A new time-domain technique for an accurate and fast measurement of the resonant frequency and -factor of resonators is presented. In this technique, the phase slope with respect to frequency of a resonator is characterized and used to specify its -factor and resonant frequency. To measure the phase slope, a slow-rate linear chirp signal is generated and passed through the resonator under test. The output signal is amplified and subsequently divided into two equal parts which are delayed by different amounts. Due to the linear time-frequency relationship of the chirp signal, the instantaneous frequencies of the two delayed signals are slightly different at any given time, and their phase difference can determine the resonator's phase slope. Detailed analysis of the proposed approach is presented and its accuracy is verified through simulations and measurements. Based on the measured results, the proposed approach characterizes the resonant frequency and -factor by less than 0.6% and 4% error, respectively.

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“…25,[41][42][43] One further step in the development of electromagnetic resonator-based sensors was taken with the use of a pair of sensor structures instead of a single one. 44,45 One of the resonators in this approach is providing a reference reading from the background, so that the ambient variations can be canceled out with differential measurement of outputs from both sensors. This paper presents an electromagnetic resonator-based microfluidic lab-on-chip system with contactless, real-time double measurement capability for sensing of liquid samples.…”

Section: Introductionmentioning

confidence: 99%

Gold-on-glass microwave split-ring resonators with PDMS microchannels for differential measurement in microfluidic sensing

et al. 2020

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This paper describes a microwave resonator incorporating microfluidic lab-on-chip sensor system capable of performing simultaneous differential measurement based sensing of liquid samples. The resonators are split-ring resonator shapes made of gold on glass substrates. Directly bonded on glass substrates are polydimethylsiloxane microchannels. Sensor system design incorporates a pair of identical resonators, one of which performs reference reading from the background. Tracking the difference of the responses of both resonators simultaneously, rather than a single one, is used to obtain a more linear and noise-free reading. The sensor system was produced with conventional fabrication techniques. It is compatible with low-cost, simple, easy to handle sensing applications. Results indicate that reliable differential measurement was possible owing to a well-matched pair of sensors with a response error as low as 0.1%. It was also demonstrated that differential measurement capability enables sensing with improved linearity. Measurements were performed with glucose solutions in the range of 3.2-16.1 mM, achieving a sensitivity of 0.16 MHz/mM.

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Reference-Incorporating Microwave Resonator-Based Sensors for Biological Sensing Applications

Cited by 4 publications

References 5 publications

Loop Antenna Driven Double Microwave Resonator-Based Sensors Incorporating PDMS Microchannels on Glass Substrates

Loop Antenna Driven Double Microwave Resonator-Based Sensors Incorporating PDMS Microchannels on Glass Substrates

A Low-Complexity Time-Domain Method for a Fast and Accurate Measurement of Q-Factor and Resonant Frequency of RF and Microwave Resonators

Gold-on-glass microwave split-ring resonators with PDMS microchannels for differential measurement in microfluidic sensing

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