Quad band electric field‐driven LC resonator‐based polarisation‐insensitive metamaterial absorber

2018 ◽  
Vol 12 (4) ◽  
pp. 588-594 ◽  
Author(s):  
Deepak Sood ◽  
Chandra Charu Tripathi
Keyword(s):  
Electric Field ◽  
Metamaterial Absorber ◽  
Lc Resonator

scholarly journals Tunable and Anisotropic Dual-Band Metamaterial Absorber Using Elliptical Graphene-Black Phosphorus Pairs

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Yijun Cai ◽  
Shuangluan Li ◽  
Yuanguo Zhou ◽  
Xuanyu Wang ◽  
Kai-Da Xu ◽  
...  
Keyword(s):  
Electric Field ◽  
Surface Plasmon ◽  
Infrared Region ◽  
Metamaterial Absorber ◽  
Black Phosphorus ◽  
Dual Band ◽  
Polarization Sensitivity ◽  
Surface Plasmon Resonances ◽  
Field Distributions ◽  
Plasmon Resonances

AbstractWe numerically propose a dual-band absorber in the infrared region based on periodic elliptical graphene-black phosphorus (BP) pairs. The proposed absorber exhibits near-unity anisotropic absorption for both resonances due to the combination of graphene and BP. Each of the resonances is independently tunable via adjusting the geometric parameters. Besides, doping levels of graphene and BP can also tune resonant properties effectively. By analyzing the electric field distributions, surface plasmon resonances are observed in the graphene-BP ellipses, contributing to the strong and anisotropic plasmonic response. Moreover, the robustness for incident angles and polarization sensitivity are also illustrated.

Compact Triple Band Metamaterial Antenna Based on Modified Electric-field Coupled-LC Resonator

2014 ◽  
Vol 70 (1) ◽  
Author(s):  
B. D. Bala ◽  
M. K. A. Rahim ◽  
N. A. Murad ◽  
M. H. Mokhtar
Keyword(s):  
Electric Field ◽  
Magnetic Moments ◽  
Capacitive Coupling ◽  
Structural Modifications ◽  
Unit Cell Size ◽  
Metamaterial Antenna ◽  
Resonance Frequencies ◽  
Lc Resonator ◽  
Strip Lines ◽  
Triple Band

In this paper, a compact triple band metamaterial antenna based on modified electric-field coupled (ELC) resonator is presented. The modification to the conventional ELC is achieved by the use of strip lines to enhance the capacitive coupling of the capacitive gaps and a stub printed at the back of the resonator. The unit cell’s macroscopic parameters were not affected by the structural modifications as the electric moment dominates the magnetic moments in the ELC response. By employing this structure, three resonance frequencies at 1.65 GHz, 3.5 GHz and 5.8 GHz are obtained. The overall size of the antenna is 40 mm × 45 mm (0.22λo × 0.24λo) with the unit cell size of 12 mm × 11 mm (0.066λo × 0.060λo) at 1.65 GHz. The peak gain of 2.10 dBi and radiation efficiency of 97% is obtained at 5.8 GHz. The proposed antenna has advantages of being compact, small and suitable for WiMAX (3.5 GHz) and WLAN (5.8 GHz) applications. The simulated and measured return losses and the radiation patterns are presented and compared.  

Ultra-thin wideband magnetic-type metamaterial absorber based on LC resonator at low frequencies

2015 ◽  
Vol 121 (1) ◽  
pp. 233-238 ◽  
Author(s):  
Linbo Zhang ◽  
Peiheng Zhou ◽  
Haiyan Chen ◽  
Haipeng Lu ◽  
Jianliang Xie ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Low Frequencies ◽  
Lc Resonator ◽  
Magnetic Type

scholarly journals Extremely Sensitive Microwave Microfluidic Dielectric Sensor Using a Transmission Line Loaded with Shunt LC Resonators

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6811
Author(s):  
Haneen Abdelwahab ◽  
Amir Ebrahimi ◽  
Francisco J. Tovar-Lopez ◽  
Grzegorz Beziuk ◽  
Kamran Ghorbani
Keyword(s):  
Electric Field ◽  
Transmission Line ◽  
Microfluidic Channel ◽  
High Sensitivity ◽  
Sensor Performance ◽  
Methanol Solutions ◽  
Dielectric Sensor ◽  
Lc Resonator ◽  
Working Principle ◽  
Lc Resonators

In this paper, a very high sensitivity microwave-based planar microfluidic sensor is presented. Sensitivity enhancement is achieved and described theoretically and experimentally by eliminating any extra parasitic capacitance not contributing to the sensing mechanism. The sensor consists of a microstrip transmission line loaded with a series connected shunt LC resonator. A microfluidic channel is attached to the area of the highest electric field concentration. The electric field distribution and, therefore, the resonance characteristics are modified by applying microfluidic dielectric samples to the sensing area. The sensor performance and working principle are described through a circuit model analysis. A device prototype is fabricated, and experimental measurements using water/ethanol and water/methanol solutions are presented for validation of the sensing mathematical model.

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