Compact Triple-Band Antenna Employing Simplified MTLs for Wireless Applications by Zhangjing Wang, Yang Peng, Yahua Ran

“…A compact triple-band asymmetric coplanar waveguide- (ACPW-) fed antenna based on simplified metamaterial transmission lines (SMTLs) is proposed in this paper. …”
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Key technologies of satellite communications aided by reconfigurable holographic surfaces by Xinyuan HU, Ruoqi DENG, Boya DI, Hongliang ZHANG, Lingyang SONG

“…Ultra-dense low earth orbit (LEO) satellite communication networks can overcome the scarcity of spectrum resources and the limited coverage of traditional terrestrial networks, and thus have the potential to provide high data rate services and global massive connectivity for terrestrial users.However, due to the high mobility of the satellites, LEO satellite networks put more stringent requirements on antenna technologies in terms of accurate beam steering and high antenna gain.Reconfigurable holographic surface (RHS), as a new type of metamaterial antenna, is investigated to assist LEO satellite communications.The RHS can electronically control the metamaterial units by leveraging the holographic principle to generate desired directional beams.Based on the hardware structure and holographic working principle of RHS, an RHS-assisted multi-satellite communication scheme was proposed, which considered both the LEO satellite tracking scheme and the data transmission scheme.A holographic beamforming optimization algorithm was also designed to maximize the sum rate.Simulation results verify the effectiveness of the proposed scheme and demonstrat that the RHS provids a more cost-effective way to support satellite communications than the conventional phased array antennas.…”
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Acoustic lattice resonances and generalised Rayleigh–Bloch waves by G. J. Chaplain, S. C. Hawkins, M. A. Peter, L. G. Bennetts, T. A. Starkey

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Reverse design of broadband sound absorption structure based on deep learning method by Yihong Zhou, Lifeng Ma, Xi Kang, Zhiyuan Zhu

“…This deep learning design method could also be extended to other types of metamaterial reverse designs, significantly enhancing the efficiency of complex metamaterial designs. …”
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A Hybrid Frequency Selective Absorber With Dual-Polarized Wireless Communication and Ultra-Wideband Absorption by Youquan Wen, Sai-Wai Wong, Chunlin Ji, Ruopeng Liu, Yejun He

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Frequency Selective Properties of Coaxial Transmission Lines Loaded with Combined Artificial Inclusions by Francisco Falcone, Javier Gil

“…The introduction of split ring resonators, conductor stubs, air gaps, and combination of these gives rise to new frequency selective properties, such as stopband or passband behavior, observable in planar as well as volumetric metamaterial structures. These results envisage new potential applications and implementation of devices in coaxial transmission line technology.…”
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Nonlinear Effects of Electromagnetic TM Wave Propagation in Anisotropic Layer with Kerr Nonlinearity by Yu G. Smirnov, D. V. Valovik

“…The DE is applied to nonlinear metamaterial as well. Comparison with a linear case is also made. …”
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Dispersion Properties of Surface Waves Decaying in Red-Shifted and Blue-Shifted Gaps in Photonic Hypercrystals by Hasnain Haider, Munazza Zulfiqar Ali

“…PHC are composed of a dielectric and hyperbolic metamaterial (HMM) with thin layers of both metal and dielectric surface waves that decay inside red-shifted gaps have a negative group velocity, whereas surface waves that decay inside traditional blue-shifted gaps have more typical characteristics. …”
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Electromagnetic Reciprocal Cloak with Only Axial Material Parameter Spatially Variant by Jing Jing Yang, Ming Huang, Fu Chun Mao, Guang Hui Cai, Yao Zhong Lan

“…Reciprocal cloak is an intriguing metamaterial device, in which a hidden antenna or a sensor can receive electromagnetic irradiation from the outside but its presence will not be detected. …”
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Broadband Circularly Polarized CPW-Fed Monopole Antenna with a Via-Free CRLH-TL Unit Cell by Liangyuan Liu, Xiangqun Shi

“…A compact microstrip line inductor and an interdigital capacitor are used to form a left-handed parallel inductor and a left-handed series capacitor. The metamaterial parameters of the series inductor and the parallel inductor are optimized. …”
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Compact Penta-Band Dual ZOR Antenna for Mobile Applications by Jae-Gon Lee, Dong-Jin Kim, Jeong-Hae Lee

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SAR Reduction Using Integration of PIFA and AMC Structure for Pentaband Mobile Terminals by Jae-Gon Lee, Jeong-Hae Lee

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Compact Two-Section Half-Wave Balun Based on Planar Artificial Transmission Lines by Changjun Liu, Zhenyu Yin, Yilan Yang, Wen Huang

“…Artificial transmission lines are realized by a series of meandered-line inductors, parallel-plate capacitors, and interdigital capacitors, which belong to metamaterial transmission lines. An ameliorated artificial transmission line is proposed to realize a low characteristic impedance transmission line. …”
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Isolation Improvement Technique for Two Closely Spaced Loop Antennas Using MTM Absorber Cells by Hongmin Lee, Hyungsup Lee

“…This paper presents a new method to improve isolation between two loop antennas with absorber cells exhibiting negative permittivity and permeability at the aimed frequency of 2.54 GHz. The metamaterial (MTM) unit cell was constructed by two open complementary split ring resonator (OCSRR) and a split ring resonator (SRR) arrangement. …”
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Indoor wireless signal coverage and enhancement based on passive reconfigurable intelligent metasurface by Haixia LIU, Hao YI, Xiangjin MA, Shuyao YUE, Xudong KONG, Pei MA, Yuxin ZENG, Long LI

“…Reconfigurable intelligent metasurface (RIS) is a new type of artificial electromagnetic metamaterial, which can control the frequency, amplitude, phase, polarization, propagation direction and wave type of electromagnetic wave flexibly.In the field of wireless communication, RIS can be used to reconstruct the wireless communication channel to achieve blind coverage of wireless signals and improve the communication quality.First, the development and research status of RIS, the key technologies and application scenarios of RIS were summarized and analyzed.Then, a new passive RIS was proposed to realize the characteristics of the aperture reconfiguration and beam reconfiguration through passive coding and splicing principle, which had the advantages of low cost, low power consumption and low complexity.Finally, the blind area coverage enhancement experiment of indoor wireless signal based on passive reflection metasurface was carried out.The effectiveness of passive splicing metasurface in wireless communication blind coverage scenarios was proved by comparison between simulation and field measurement.In addition, for 5G/6G millimeter wave communication, the passive RIS with double-layer cross dipole elements was designed and applied to typical indoor L-shaped corridor scene to verify the enhancement effect of indoor wireless signal coverage.…”
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Effect of Substrate Material on the Electromagnetic Properties of the Photolithography Printed Antenna by Thiyaneswaran Balashanmugam, Aruna Devi Baladhandapani, Palanivel Rajan Selvakumaran, Dhanagopal Ramachandran, Suresh Kumar Muthuvel, Priyadharshini Sivaraj, Samson Alemayehu Mamo

“…The proposed antenna has CSRR (Complementary Split-Ring Resonator) which is engraved on the radiating element, and the shape of the CSRR is the hexagon. The proposed metamaterial-inspired antenna exhibits multiband operation at 2.1 GHz, 2.6 GHz, 4.6 GHz, 5.5 GHz, 6.1 GHz, and 7.1 GHz. …”
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Innovative Radiating Systems for Train Localization in Interference Conditions by C. Vegni, M. Tosti, A. M. Vegni

“…The design of innovative radiating systems based on the metamaterial technology for GNSS (Global Navigation Satellite System) applications in radio frequency (RF) interference conditions is proposed. …”
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Hybrid Dyakonov Surface Waves at Uniaxial Crystal-Temperature-Sensitive Material Interfaces by Tahseen Sana, Majeed A. S. Alkanhal, Ahtisham Ali, Hafeez Ullah, Abdul Ghaffar, Yasin Khan, Muhammad Zeshan Yaqoob

“…The uniaxial crystal is realized as a metamaterial having a direction-dependent permittivity tensor, with the optical axis (OA) parallel to the interface. …”
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Compact Quadband Bandstop Filter Based on Concentric Split Ring Resonators with Perturbation for Multifunctional Wireless Systems by Pierre Moukala Mpele

“…The desired performance is achieved by introducing two diamond-shaped concentric split ring resonators (DSCSRRs) intercoupled and defected ground structure. The metamaterial properties of the DSCSRR have been verified by extracting and analyzing its effective permittivity and permeability. …”
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MICROSTRUCTURE DESIGN AND MECHANICAL PROPERTIES ANALYSIS OF POROUS BONE WITH NEGATIVE POISSION’S RATIO (MT) by YE JianHua, LI DongYu, LIN Jia, ZENG ShouJin, WEI TiePing, XU MingSan

“…In view of the large difference between the elastic modulus of human bone structure and metal materials and the difficulty of control, the goal is to reduce or eliminate the “stress shielding” effect in a wide span, introduce a negative Poisson’s ratio metamaterial with an unconventional deformation mechanism, carry out the design and experimental research of porous microstructure with wide span and low elastic modulus. …”
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