scholarly journals A Compact Ultrawideband Antenna Based on Hexagonal Split-Ring Resonator for pH Sensor Application

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2959 ◽  
Author(s):  
Mohammad Islam ◽  
Farhad Ashraf ◽  
Touhidul Alam ◽  
Norbahiah Misran ◽  
Kamarulzaman Mat
Keyword(s):  
Ring Resonator ◽  
Coupling Effect ◽  
Ph Sensor ◽  
Split Ring Resonator ◽  
Strip Line ◽  
Ph Sensing ◽  
Uwb Antenna ◽  
Split Ring ◽  
Electrical Length ◽  
Sensing Applications

A compact ultrawideband (UWB) antenna based on a hexagonal split-ring resonator (HSRR) is presented in this paper for sensing the pH factor. The modified HSRR is a new concept regarding the conventional square split-ring resonator (SSRR). Two HSRRs are interconnected with a strip line and a split in one HSRR is introduced to increase the electrical length and coupling effect. The presented UWB antenna consists of three unit cells on top of the radiating patch element. This combination of UWB antenna and HSRR gives double-negative characteristics which increase the sensitivity of the UWB antenna for the pH sensor. The proposed ultrawideband antenna metamaterial sensor was designed and fabricated on FR-4 substrate. The electrical length of the proposed metamaterial antenna sensor is 0.238 × 0.194 × 0.016 λ, where λ is the lowest frequency of 3 GHz. The fractional bandwidth and bandwidth dimension ratio were achieved with the metamaterial-inspired antenna as 146.91% and 3183.05, respectively. The operating frequency of this antenna sensor covers the bandwidth of 17 GHz, starting from 3 to 20 GHz with a realized gain of 3.88 dB. The proposed HSRR-based ultrawideband antenna sensor is found to reach high gain and bandwidth while maintaining the smallest electrical size, a highly desired property for pH-sensing applications.

scholarly journals COUPLING EFFECT OF SPLIT RING RESONATOR AND ITS MIRROR IMAGE

2012 ◽  
Vol 124 ◽  
pp. 233-247 ◽  
Author(s):  
Fuli Zhang ◽  
Qian Zhao ◽  
Jingbo Sun ◽  
Ji Zhou ◽  
Didier Lippens
Keyword(s):  
Ring Resonator ◽  
Coupling Effect ◽  
Split Ring Resonator ◽  
Mirror Image ◽  
Split Ring

scholarly journals Effect of Stripline Number on Resonant Frequency of Hexagonal Split Ring Resonator Metamaterial

2020 ◽  
Vol 9 (1) ◽  
pp. 26-30
Author(s):  
Romi Fadli Syahputra ◽  
Yan Soerbakti ◽  
Riad Syech ◽  
Erman Taer ◽  
Saktioto Saktioto
Keyword(s):  
Electromagnetic Field ◽  
Resonant Frequency ◽  
Ring Resonator ◽  
Negative Refractive Index ◽  
Split Ring Resonator ◽  
Electromagnetic Properties ◽  
Strip Line ◽  
Frequency Range ◽  
Split Ring ◽  
Resonant Frequency Shift

Piranti-piranti elektronik maupun optoelektronik yang efisien dan responsif saat ini tengah masif dikembangkan dalam beragam bentuk dan jenis. Meta-material merupakan rancangan optoelektronik yang unik dengan sifat elektromagnetik yang tidak ditemukan secara alami, salah satunya adalah peristiwa indeks bias negatif. Eksplorasi terhadap banyak ragam struktur metamaterial sangat penting dilakukan untuk mengidentifikasi karakteristik tiap struktur. Salah satu struktur metamaterial yang menarik dikaji adalah bentuk heksagonal. Penelitian ini menginvestigasi karakteristik frekuensi resonan dan distribusi medan elektromagnetik metamaterial split ring resonator heksagonal (SRR-H) yang dikombinasikan dengan stripe line (SL) berupa logam tembaga. Lebih lanjut, jumlah SL divariasikan dari 0 - 5 unit dan disimulasikan dalam medium udara dalam rentang frekuensi 1 – 7,5 GHz. Hasil simulasi menunjukan adanya pergeseran frekuensi resonan untuk tiap penambahan SL dalam rentang frekuensi 4,31 – 5,82 GHz. Sebaran medan listrik cenderung terpusat pada cincin resonator sedangkan medan magnet cenderung terdistribusi pada SL. Desain metamaterial SRR-H dengan 3 SL memberikan respon disipasi energi yang terkecil dengan medan E maksimum 2,59 kV×m-1 dan medan H maksimum 8,69 A×m-1. Desain SRR-H ini cukup potensial untuk diaplikasikan sebagai antena gelombang elektomagnetik yang efisien dan juga sebagai biosensor. Efficient and responsive electronic and optoelectronic devices are currently being massively developed in various forms and types. Metamaterial is a unique optoelectronic design with electromagnetic properties that are not found naturally, one of its properties is a negative refractive index. Exploration of different types of metamaterial structures is very important to identify the characteristics of each structure. One of the interesting metamaterial structures is a hexagonal shape. This research investigates the resonant frequency characteristics and electromagnetic field distribution of split-ring resonator (SRR-H) hexagonal-shaped metamaterial which is combined with the copper stripe line (SL). Furthermore, the number of SL is varied from 0 to 5 units and simulated in the air medium in frequency range of 1 - 7.5 GHz. The simulation results show a resonant frequency shift occurred for each SL combination in the 4.31 - 5.82 GHz frequency range. The distribution of the electric field tends to be concentrated on the resonator while the magnetic field tends to be distributed on the SL. The SRR-H metamaterial with 3 SL provides the smallest energy dissipation response with a maximum E field of 2.59 kV×m-1 and a maximum H field of 8.69 A×m-1. The SRR-H design is potential enough to be applied as an efficient electromagnetic wave antenna and also as a biosensor.Keywords: Metamaterials, SRR-H, strip line, resonant frequency, electromagnetic field

Electric Split-Ring Resonator Based on Double-Sided Parallel-Strip Line

2013 ◽  
Vol 12 ◽  
pp. 69-71 ◽  
Author(s):  
Luyu Wang ◽  
Xian Qi Lin ◽  
Fei Cheng ◽  
Yong Fan ◽  
Zhong Bo Zhu
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Strip Line ◽  
Split Ring ◽  
Parallel Strip

Square/hexagonal split ring resonator loaded exponentially tapered slot ultra wideband (UWB) antenna with frequency notch characteristics

2017 ◽  
Vol 59 (6) ◽  
pp. 1241-1245 ◽  
Author(s):  
Chinmoy Saha ◽  
Priyanka Natani ◽  
Latheef A. Shaik ◽  
Jawad Y. Siddiqui ◽  
Y.M.M. Antar
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Ultra Wideband ◽  
Uwb Antenna ◽  
Split Ring

scholarly journals Coupling Schemes in Terahertz Planar Metamaterials

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Dibakar Roy Chowdhury ◽  
Ranjan Singh ◽  
Antoinette J. Taylor ◽  
Hou-Tong Chen ◽  
Weili Zhang ◽  
...  
Keyword(s):  
Resonance Line ◽  
Ring Resonator ◽  
Near Field ◽  
Split Ring Resonator ◽  
Higher Order ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Sensing Applications ◽  
Lattice Mode

We present a review of the different coupling schemes in a planar array of terahertz metamaterials. The gap-to-gap near-field capacitive coupling between split-ring resonators in a unit cell leads to either blue shift or red shift of the fundamental inductive-capacitive (LC) resonance, depending on the position of the split gap. The inductive coupling is enhanced by decreasing the inter resonator distance resulting in strong blue shifts of theLCresonance. We observe theLCresonance tuning only when the split-ring resonators are in close proximity of each other; otherwise, they appear to be uncoupled. Conversely, the higher-order resonances are sensitive to the smallest change in the inter particle distance or split-ring resonator orientation and undergo tremendous resonance line reshaping giving rise to a sharp subradiant resonance mode which produces hot spots useful for sensing applications. Most of the coupling schemes in a metamaterial are based on a near-field effect, though there also exists a mechanism to couple the resonators through the excitation of lowest-order lattice mode which facilitates the long-range radiative or diffractive coupling in the split-ring resonator plane leading to resonance line narrowing of the fundamental as well as the higher order resonance modes.

scholarly journals An Aligned-Gap and Centered-Gap Rectangular Multiple Split Ring Resonator for Dielectric Sensing Applications

Sensors ◽  
2014 ◽  
Vol 14 (7) ◽  
pp. 13134-13148 ◽  
Author(s):  
Izyani Rusni ◽  
Alyani Ismail ◽  
Adam Alhawari ◽  
Mohd Hamidon ◽  
Nor Yusof
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Sensing Applications
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