Polarization-Insensitive Triple-Band Microwave Metamaterial Absorber Based on Rotated Square Rings

Wang, Guodong; Chen, Junfeng; Hu, Xiwei; Chen, Zhaoquan; Liu, Minghai

doi:10.2528/pier14010401

Cited by 44 publications

(19 citation statements)

References 24 publications

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“…The results verify the validity of theoretical calculation by comparing favorably with numerical simulation and experiment. Third, the proposed model is easy to verify and also adds to the earlier publications [27], [28]. Compared with previous reports, we first apply the extended interference theory model to the broadband HIS-MA.…”

mentioning

confidence: 88%

High-Impedance Surface-Based Broadband Absorbers With Interference Theory

Chen

Wang

et al. 2015

IEEE Trans. Antennas Propagat.

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129

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A broadband and polarization-insensitive high impedance surface (HIS) metamaterial absorber (MA) based on octagonal ring-shaped resistive patches is presented. The absorber is investigated theoretically, experimentally and by simulation. The simulated results indicate that this structure obtains 10.28 GHz-wide absorption from 3.65 to 13.93 GHz with absorptivity larger than 90% at the normal incidence. Experimental results are in accordance with those of the simulation results. The electromagnetic (EM) field distributions and the plots of surface power loss density have been illustrated to analyze the absorption mechanism of the structure. Further simulations of the absorptivity of the proposed absorber with different surface resistances and substrate thicknesses indicate that there exist optimal values for the design. The polarization-insensitive feature and the properties under oblique incidence are also investigated. Finally, the interference theory is introduced to analyze and interpret the broadband absorption mechanism at both normal and oblique incidence. The calculated absorption rates of the proposed absorber coincide well with the simulated results. Therefore, the simulated and experimental results verify the validity of the theoretically analytical method for this type of broadband absorber.Index Terms-High impedance surface (HIS), metamaterial absorber (MA), broadband, microwave, interference theory.

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mentioning

confidence: 88%

High-Impedance Surface-Based Broadband Absorbers With Interference Theory

Chen

Wang

et al. 2015

IEEE Trans. Antennas Propagat.

Self Cite

129

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“…MMAs are developed and studied for potential applications like sensors, radar cross section (RCS) reduction, medical imaging, spectroscopic detector and solar cell applications, to name a few. As a result of these magnificent properties, the MMAs are explored from single-band [14,15], dual-band [16][17][18], tripleband [19][20][21][22], quad-band [23,24] in the form of multi-band [25][26][27] up to narrow band [28,29] and broad band [30,31] with frequency ranging from microwaves [29,30] to terahertz [32]. Any EM absorber performance is determined by how efficiently it absorbs the input EM signals.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Polarization-Insensitive Metamaterial Inspired Microwave Absorber for Lte-Band Applications

Kaur¹,

Upadhyaya²,

Palandoken³

2017

PIER C

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Abstract-In this paper, the design, simulation and measurement of a dual-band polarizationinsensitive metamaterial inspired microwave absorber are presented. The unit cell is composed of two concentric closed ring resonator (CRR) structures forming octagonal rings which are carved on an FR-4 dielectric substrate to give maximum absorption at dual frequencies of 2.09 GHz and 2.54 GHz. At these frequencies, the minimum reflection coefficients of −29.15 dB and −18.76 dB are achieved with absorption rates of 99.88% and 98.67% and narrow 10 dB bandwidths of 2.62% and 2.76%, respectively. Microwave absorption property of the proposed absorber structure is simulated by setting the perfect electric boundary conditions in four planes whose surface normal vectors are directed perpendicular to the wave propagation direction. These numerical computation settings replicate the rectangular waveguide to be used in the experimental measurements for the comparison between the simulated and experimental results. It is experimentally verified by the waveguide measurement method that the absorption rates about 99% are achieved for dual bands with polarization insensitivity thereby meeting the absorption requirements of LTE-band frequencies for a real time microwave absorber based energy harvesting systems.

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“…Absorbing materials have been widely used. Some of the areas include the defense industry, in traditional microwave component designs, and in conventional EMC/EMI test and control environments [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Recently, novel applications of microwave absorbing materials in computer system designs have been investigated [34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Reduction of PCB PDN Impedance and Radiated Emissions Using a Hybrid Technique With Absorbing Materials and Decoupling Capacitors

Huang¹,

Charles²,

Xiao³

et al. 2017

PIER B

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Abstract-In this paper, we present an approach to reduce the cavity resonant edge effects in printed circuit boards (PCBs) and semiconductor packages. Power supply noise, in the form of fast changing currents (di/dt), traverses the power-return paths of PCBs and semiconductor packages using power vias. The cavity effects produce considerable level of noise along the edges of PCB and integrated circuit (IC) package power planes due to signal coupling between vias and reflection from PCB edges with transient currents. The cavity effects also amplify the electromagnetic radiation from PCB edges, which are major sources of EMI/EMC problems in electronic devices. By using absorbing material and decoupling capacitors (de-caps) on power distribution networks (PDNs), we observe considerable mitigation in impedance noise, signal noise and electromagnetic interference/compatibility (EMI/EMC) issues caused by the cavity effects. In particular, simulation results show notable reduction of upper peak (anti-resonant) impedance noise and reduction in radiated emissions by as much as 20 dB. This article presents a comparative case-study using various models (Section 3) and report on their effectiveness to reduce the cavity effects. The models are listed as (1) "Original" model, (2) "Absorbing material along the edge" model, (3) "MURATA based De-cap only" model and (4) "Absorbing material along the edge w/De-cap" model. The used capacitance ranges between 0.1 µF and 22 µF. The ESR and ESL range between 2 mOhm-20 mOhm and 238 pH-368 pH, respectively. Conclusively, we learn by adding absorbing material along the PCB edges with a few decoupling capacitors. The PDN impedance noise is improved, and EMI issues in PCBs and semiconductor packages suppress the cavity effects.

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Polarization-Insensitive Triple-Band Microwave Metamaterial Absorber Based on Rotated Square Rings

Cited by 44 publications

References 24 publications

High-Impedance Surface-Based Broadband Absorbers With Interference Theory

High-Impedance Surface-Based Broadband Absorbers With Interference Theory

Dual-Band Polarization-Insensitive Metamaterial Inspired Microwave Absorber for Lte-Band Applications

Reduction of PCB PDN Impedance and Radiated Emissions Using a Hybrid Technique With Absorbing Materials and Decoupling Capacitors

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