Q-factor control in asymmetry single circular split ring resonator via positon of gap

Abstract In this paper, novel symmetrical split ring resonator (SSRR) is proposed as a suitable component for performance enhancement of microwave sensors. SSRR has been employed for enhancing the insertion loss of the microwave sensors. Using the same device area, we can achieve a high Q-factor of 141.54 from the periphery enhancement using Quasi-linear coupling SSRR, whereas loose coupling SSRR can achieve a Q-factor of 33.98 only. Using Quasi-linear coupling SSRR, the Q-factor is enhanced 4.16 times the loose coupling SSRR using the same device area. After the optimization was made, the SSRR sensor with loose coupling scheme has achieved a very high Qfactor value around 407.34 while quasi-linear scheme has achieved high Q-factor value of 278.78 at the same operating frequency with smaller insertion loss. Spurious passbands at 1st, 2nd, 3rd, and 4th harmonics have been completely suppressed well above -20 dB rejection level without visible changes in the passband filter characteristics. The most significant of using SSRR is to be used for various industrial applications such as food industry, quality control, bio-sensing medicine and pharmacy. The simulation result that Quasi-linear coupling SSRR is a viable candidate for the performance enhancement of microwave sensors has been verified.

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Penta band single negative meta-atom absorber designed on square enclosed star-shaped modified split ring resonator for S-, C-, X- and Ku- bands microwave applications

Scientific Reports ◽

10.1038/s41598-021-87958-6 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Md. Rashedul Islam ◽

Mohammad Tariqul Islam ◽

Md. Moniruzzaman ◽

Md. Samsuzzaman ◽

Haslina Arshad

Keyword(s):

Ring Resonator ◽

Surface Current ◽

Good Deal ◽

Split Ring Resonator ◽

Unit Cell ◽

Q Factor ◽

Split Ring ◽

Ring Shape ◽

Microwave Applications ◽

Meta Atom

AbstractThis paper represents a penta band square enclosed star-shaped modified split ring resonator (SRR) based single negative meta-atom absorber (MAA) for multi-band microwave regime applications. FR-4 low-cost material has been used as a substrate to make the MAA unit cell with 0.101λ0 × 0.101λ0 of electrical size, where λ0 is the wavelength calculated at the lower resonance frequency of 3.80 GHz. There are two outer square split ring and one inner star ring shape resonator of 0.035 mm thickness of copper placed on the one side, and another side of the substrate has full copper to construct the desired unit cell. The MAA unit cell provides five absorption peaks of 97.87%, 93.65%, 92.66%, 99.95%, and 99.86% at the frequencies of 3.80, 5.65, 8.45, 10.82, and 15.92 GHz, respectively, which covers S-, C-, X-, and Ku- bands. The properties of MAA have been investigated and analyzed in the E-, H-fields and surface current. The EMR and highest Q factor of the designed MAA is 9.87 and 30.41, respectively, and it shows a single negative (SNG) property. Different types of parametric analysis have been done to show the better performance of absorption. Advanced Designed System (ADS) software has been used for equivalent circuit to verify the simulated S11 result obtained from the CST-2019 software. Experimental outcomes of the MAA unit cell have a good deal with the simulated result and measured result of the 24 × 20 array of unit cells also shown. Since the unit cell provides superior EMR, excellent Q-factor, and highest absorption so the recommended MAA can be effectively used as a penta band absorber in microwave applications, like notch filtering, sensing, reducing the unintended noise generated with the copper component of the satellite and radar antennas.

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High Quality Factor using Nested Complementary Split Ring Resonator for Dielectric Properties of Solids Sample

Applied Computational Electromagnetics Society ◽

10.47037/2020.aces.j.351016 ◽

2020 ◽

Vol 35 (10) ◽

pp. 1222-1227

Author(s):

Norhanani Rahman ◽

Zahriladha Zakaria ◽

Rosemizi Rahim ◽

Maizatul Said ◽

Amyrul Bahar ◽

...

Keyword(s):

Quality Factor ◽

Error Detection ◽

Ring Resonator ◽

Split Ring Resonator ◽

Q Factor ◽

Split Ring ◽

Theoretical Simulation ◽

Complementary Split Ring Resonator ◽

Industry Applications ◽

Quality Factor Q

A Nested complementary split ring resonator (CSRR) was proposed based on planar structure. The main objective of this work is to get a higher quality factor (Q-factor) with minimal error detection of complex permittivity. The sensor operated at the 3.37GHz resonant frequency and simulated by ANSYS HFSS software. Subsequently, the designed sensor has been fabricated and tested with the presence of several material under test (MUTs) placed over the sensor. The result achieved high unloaded Q-factor, 464. There has been proof of good agreement concerning the results between theoretical, simulation, and measured parameters of error detection, which is below 13.2% real part permittivity and 2.3% the loss tangent. The proposed sensor is practically useful for the food industry, bio-sensing, and pharmacy industry applications.

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Compact antenna based on split ring resonator as high Q-factor antenna for liquid permittivity measurements

Frequenz ◽

10.1515/freq-2020-0142 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Shima Poorgholam-Khanjari ◽

Ahmad Hatami ◽

Ferdows B. Zarrabi

Keyword(s):

Ring Resonator ◽

Low Cost ◽

Split Ring Resonator ◽

Slot Antenna ◽

Q Factor ◽

Split Ring ◽

Compact Antenna ◽

Industrial Oil ◽

5 Ghz ◽

Permittivity Measurements

Abstract Microwave sensing is important to measure the permittivity of the materials or detecting a material. In this current work, a compact antenna for WLAN application with circular polarization is designed. We are supposed to use it as a sensor to determine the permittivity of industrial oil. For calibration of the sensor, the gasoline and petrol are utilized based on Debye theory and also butanol is checked. This antenna is designed based on Microstrip slot antenna with bent feed line and special split-ring resonator (SRR) as a metamaterial (MTM) element for 4 GHz, it is shown that metamaterial can be considered for improving the Q-factor and matching where the return loss is reduced from −16.5 to −33.5 dB and the Q-factor is increased from 2.39 to 32.9. It covers 4–5 GHz with the bidirectional pattern with gain of 4 dBi which makes it useful for putting inside of liquids. The total dimensions of this resonator are 20 × 20 × 1.6 mm and the FR-4 low-cost substrate is used and the experimental results are confirmed the simulations results by HFSS commercial full-wave software. In fact, this method can be used for fast detecting oil condition and longevity by checking the resonances’ shift and permittivity.

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Passive Split Ring Resonator for Continuous Physiological Sensing Through Conductivity Measurements

Volume 10: Micro- and Nano-Systems Engineering and Packaging ◽

10.1115/imece2013-66744 ◽

2013 ◽

Author(s):

Evan Baker ◽

Noah Shaw ◽

Chen Wang ◽

Hao Zhang ◽

Cheng Sun

Keyword(s):

Resonant Frequency ◽

Printed Circuit Board ◽

Ring Resonator ◽

Fdtd Method ◽

Split Ring Resonator ◽

Circuit Board ◽

Q Factor ◽

Split Ring ◽

Resonator Structure ◽

Radio Band

The Split Ring Resonator (SRR) has been developed and explored for a number of sensing technologies and devices. A SRR can be equivalently regarded as an LC circuit; changes in the dielectric environment will change the equivalent capacitance of the resonator, resulting in a shift of the resonant frequency as well as the quality factor (Q-factor).This makes the device a promising application for continuous personal health monitoring throughout the day. In this work, we are developing a passive radio frequency sensor based on ring resonator designs. The targeted frequency band is within 2.4–2.5GHz ISM (Industrial-Scientific-Medical radio band) and is available for medical devices. The resonator structure is first simulated using Finite Difference Time Domain (FDTD) method by CST Microwave Studio to determine the resonant frequency. Then for the experimental study, a microstrip transmission line with a double split ring resonator (DSRR) was fabricated on a printed circuit board (PCB) with biocompatible PVC coating on top. Tuning the thickness and material of the biocompatible coating can further improve the biocompatibility, Q-factor, and resulting sensitivity (mS) of the device. Reflection spectrum (S11) is measured using a network analyzer at 100 mW. The current design senses changes in conductivity down to 0.5 mS. By reducing coating thickness, reducing the spacing between resonators, and with more efficient resonator designs we expect to further improve this sensitivity. This sensor could be utilized by either implanted into the interstitial layer beneath the skin or embedded into a contact lens to sense tear salinity levels.

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Penta Band Single Negative Meta-Atom Absorber designed on Square Enclosed Star-Shaped Modified Split Ring Resonator for S-, C-, X- and Ku- Bands Microwave Applications

10.21203/rs.3.rs-252321/v1 ◽

2021 ◽

Author(s):

Md. Rashedul Islam ◽

Mohammad Tariqul Islam ◽

Md. Moniruzzaman ◽

Md. Samsuzzaman ◽

Haslina Arshad

Keyword(s):

Ring Resonator ◽

Surface Current ◽

Good Deal ◽

Split Ring Resonator ◽

Unit Cell ◽

Q Factor ◽

Split Ring ◽

Ring Shape ◽

Microwave Applications ◽

Meta Atom

Abstract This paper represents a penta band square enclosed star-shaped modified split ring resonator (SRR) based single negative meta-atom absorber (MAA) for multi-band microwave regime applications. FR-4 low-cost material has been used as a substrate to make the MAA unit cell with 0.101λ0 × 0.101λ0 of electrical size, where λ0 is the wavelength calculated at the lower resonance frequency of 3.80 GHz. There are two outer square split ring and one inner star ring shape resonator of 0.035 mm thickness of copper placed on the one side, and another side of the substrate has full copper to construct the desired unit cell. The MAA unit cell provides five absorption peaks of 97.87%, 93.65%, 92.66 %, 99.95%, and 99.86% at the frequencies of 3.80, 5.65, 8.45, 10.82, and 15.92 GHz, respectively, which covers S-, C-, X-, and Ku-bands. The properties of MAA have been investigated and analyzed in the E-, H-fields and surface current. The EMR and highest Q factor of the designed MAA is 9.87 and 30.41, respectively, and it shows a single negative (SNG) property. Different types of parametric analysis have been done to show the better performance of absorption. Advanced Designed System (ADS) software has been used for equivalent circuit to verify the simulated S11 result obtained from the CST-2019 software. Experimental outcomes of the MAA unit cell have a good deal with the simulated result and measured result of the 24×20 array of unit cells also shown. Since the unit cell provides superior EMR, excellent Q-factor, and highest absorption so the recommended MAA can be effectively used as a penta band absorber in microwave applications, like notch filtering, sensing, reducing the unintended noise generated with the copper component of the satellite and radar antennas.

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A Submersible Printed Sensor Based on a Monopole-Coupled Split Ring Resonator for Permittivity Characterization

Sensors ◽

10.3390/s19081936 ◽

2019 ◽

Vol 19 (8) ◽

pp. 1936 ◽

Cited By ~ 11

Author(s):

Erick Reyes-Vera ◽

G. Acevedo-Osorio ◽

Mauricio Arias-Correa ◽

David E. Senior

Keyword(s):

Ring Resonator ◽

Surrounding Medium ◽

Split Ring Resonator ◽

Q Factor ◽

Split Ring ◽

Dielectric Characterization ◽

Non Invasive ◽

Sensing Applications ◽

Compact Size ◽

The One

This work presents a non-invasive, reusable and submersible permittivity sensor that uses a microwave technique for the dielectric characterization of liquid materials. The proposed device consists of a compact split ring resonator excited by two integrated monopole antennas. The sensing principle is based on the notch introduced by the resonators in the transmission coefficient, which is affected due to the introduction of the sensor in a new liquid material. Then, a frequency shift of the notch and the Q-factor of the proposed sensor are related with the changes in the surrounding medium. By means of a particular experimental procedure, commercial liquids are employed to obtain the calibration curve. Thus, a mathematical equation is obtained to extract the dielectric permittivity of liquid materials with unknown dielectric properties. A good match between simulated and experimental results is obtained, as well as a high Q-factor, compact size, good sensitivity and high repeatability for use in sensing applications. Sensors like the one here presented could lead to promising solutions for characterizing materials, particularly in determining material properties and quality in the food industry, bio-sensing and other applications.

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Simulation on biomarker sensor miniaturization based on metamaterial

Modern Physics Letters B ◽

10.1142/s0217984919501355 ◽

2019 ◽

Vol 33 (11) ◽

pp. 1950135

Author(s):

Ruitao Liu ◽

Tianhong Cui

Keyword(s):

Computer Simulation ◽

Resonance Frequency ◽

Ring Resonator ◽

Split Ring Resonator ◽

Important Application ◽

Q Factor ◽

Label Free ◽

Split Ring ◽

Label Free Detection ◽

Simulation Results

Cancer is always the greatest threat to human health. In this work, a split-ring resonator (SRR)-based sensor was simulated for label-free detection on biomarkers in microwave. The model of biosensor was simulated by Computer Simulation Technology 2017 (CST2017) and some influences of feature parameters on resonance frequency and Q-factor were also discussed. From the simulation results, the model of sensor in our work showed ultrahigh Q-factor and sensitivity under different permittivities and also exhibited a trend of better performance when it works in higher frequency. Therefore, the SRR-based biosensor will become an important application in cancer precaution and treatment in the future.

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