Article
Engineering, Electrical & Electronic
Yuxin Jia, Yani Wang, Jiao Yin, Chaozong Guo, Huiqing Zhai, Changyuan Liu
Summary: A hybrid frequency selective rasorber is proposed in this letter, consisting of hybrid lossy layers, responsible for absorption performance at low and high frequencies. The A-T layer is composed of a lumped-resistors loaded cross-frame structure, while the T-A layer is constructed by a parallel plate capacitor loaded square loop resonator. The frequency selective surface layer is composed of metal square slot. The hybrid frequency selective rasorber exhibits a transmission window at around 10 GHz and absorption bands in 3.19-9 GHz and 11.85-21.18 GHz, along with wideband reflection suppression from 3.2 to 21.18 GHz (147%). An assembled prototype is measured for verification.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Mechanics
Zhiwen Mao, Kun Xu, Xiaomei Qian, Xianying Chu
Summary: In this study, a novel global-local design method with average absorption/transmission conditions (AATC) is proposed to investigate the wideband absorption/transmission characteristics of a honeycomb-core sandwich absorber (HSR) with a dual-polarized resistive sheet and second-order bandpass frequency-selective surfaces (FSS) based on the equivalent circuit model (ECM). The structure of the HSR is optimized using the global-local design method combined with the finite element model (FEM). The optimized HSR demonstrates wide absorption (3.9-17.9 GHz) and wide transmission (9.1-10.9 GHz) bands simultaneously, and its absorption/transmission performance is independent of polarizations and incident angles. The effectiveness of the proposed method is validated by the excellent electromagnetic performance of the optimized HSR.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Qijun Xing, Weiwei Wu, Yuchen Yan, Ximeng Zhang, Naichang Yuan
Summary: This article presents a frequency selective absorber with a passband and two wide absorption bands. By adjusting the parallel resonant frequencies of two layers, a nearly transparent window can be obtained. The simulation and measurement results are consistent.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Chemistry, Physical
Nur Biha Mohamed Nafis, Mohamed Himdi, Mohamad Kamal Rahim, Osman Ayop, Raimi Dewan
Summary: This study assessed the performance of optically transparent mosaic frequency selective surfaces (MFSS) for smart city and vehicle window applications. The transparent MFSS exhibited high transparency and wideband bandstop and bandpass responses with low cross-polarisation.
Article
Chemistry, Physical
Huijuan Dai, Shuying Li, Peng Dong, Yanqin Ma
Summary: This paper proposes a multilayer ultra-wideband transparent metamaterial wave absorber with the characteristics of ultra-wideband wave absorption, light transmission, and flexible bending. It also has polarization insensitivity to incident electromagnetic waves due to the complete symmetry of the structure. Simulation and experimental results demonstrate that the absorber achieves a microwave absorption rate higher than 90% in the frequency range of 8.7 GHz to 38.9 GHz, with most of the absorption rate reaching over 95%. The total bandwidth is 30.2 GHz, and the relative bandwidth is 126.9%. Furthermore, the metamaterial, through the selection and oxidation of indium tin (ITO) materials, exhibits optical transparency and flexibility, making it potentially valuable for applications in window radar stealth and conformal radar stealth of weapons and equipment.
Article
Computer Science, Information Systems
Shengnan Shi, Zizhao Chai, Shan Zhang, Yanpeng Shi, Yifei Zhang
Summary: This paper proposes a switchable, polarization-insensitive frequency selective absorber (FSR) that can switch between absorbing and transmitting modes by altering the state of the PIN diodes. This innovation can improve the omni-directional stealth capability and battlefield survivability of radar systems.
Article
Computer Science, Information Systems
Liansheng Wang, Dongyan Xia, Quanhong Fu, Xueyong Ding, Yuan Wang
Summary: This paper presents a mechanically controlled switchable wideband frequency-selective absorber, which incorporates a frequency-selective surface and a rotatable metal plate. The absorber achieves over 90% absorption from 3.9 GHz to 11.77 GHz when the metal plate is parallel to the rest of the layers, and a transmission coefficient of 0.62 at 11.6 GHz when the metal plate is perpendicular to the rest of the layers. The mechanism of wideband absorption and transmission is explained by monitoring and analyzing the surface current distribution. The control method is simple, reliable, and accurate, making it applicable in communication and radar stations.
Article
Physics, Applied
Boyu Sima, Ke Chen, Na Zhang, Junming Zhao, Tian Jiang, Yijun Feng
Summary: This paper proposes a frequency-selective metasurface that achieves low backward scattering in a wide microwave frequency band while maintaining inter-band transparent transmission. By designing the reflection properties and arrangement of meta-atoms, the phase cancellation of far-field backward scattering is achieved. Experimental verification confirms the accuracy of the simulation results.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Applied
Yi Lu, Juan Chen, Jianxing Li
Summary: In this paper, an all-dielectric water-based transparent absorber is proposed, which is composed of transparent resin material filled with water, achieving the characteristics of being all-dielectric and transparent. The simulation and test results show that the proposed absorber has high absorptivity in a specific frequency band, good thermal stability, and oblique incidence angular stability.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Callum J. Hodgkinson, Dimitris E. Anagnostou, Symon K. Podilchak
Summary: This letter examines a Jaumann-like rasorber that provides wideband absorption, angular stability, and polarization insensitivity. The structure consists of three layers, with two resistive layers on top of a lossless layer. Capacitors are also used in all three layers to ensure compactness. The rasorber shows broad angular stability up to 55 degrees, with low insertion losses of about 1 dB and 0.6 dB for measured broadside incidence. It is also demonstrated to function as a radome in the near field of a planar antenna array.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Multidisciplinary Sciences
Mohammadreza Rohaninezhad, Meysam Jalali Asadabadi, Changiz Ghobadi, Javad Nourinia
Summary: In this study, a transparent super wideband CPW antenna was designed and built with the combination of solar panels for use in wireless communication equipment and systems that require mobile power. The antenna demonstrated high transparency and conductivity, and performed well in terms of frequency range and performance parameters testing.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Yanyi Sun, Xin Liu, Yang Ming, Xiao Liu, Daniel Mahon, Robin Wilson, Hao Liu, Philip Eames, Yupeng Wu
Summary: This research introduces a novel multi-effect smart window system that integrates a thermotropic material with a transparent insulation material to enhance energy efficiency and improve indoor luminous environment. The simulation results show that installing this window system can yield significant energy savings and increase daylight availability under different climate conditions. Future research can focus on material design and development to further enhance energy efficiency and solar and daylight control.
Article
Computer Science, Interdisciplinary Applications
Saurabh Sambhav, Jayanta Ghosh
Summary: In this study, a dual-polarized wide-band rasorber with in-band transmission is proposed. The design consists of a modified swastika design on the upper layer and a square slotted design on the bottom layer, achieving broadband absorption and in-band transmission. The design is characterized by its miniaturized size, good angular stability, high fractional bandwidth, and dual-polarized response.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2022)
Article
Construction & Building Technology
Huixian Yang, Ling Zhang, Xiaosong Su, Zhongbing Liu
Summary: This paper studied the optical and thermal performance of a novel window with transparent insulation slats using polymethyl methacrylate. The research validated the model and evaluated the comprehensive thermal performance of the window, as well as the effects of slat spacing and transmittance on its thermal performance.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Electrical & Electronic
Erwei Cheng, Xuemeng Wang, Xiangkun Kong
Summary: A parallel-plate waveguide (PPW)-type transverse electromagnetic (TEM) transmission chamber has been designed and analyzed. The designed TEM cell, surrounded by absorbing foam, shows effective results in reducing edge radiation. The testing of a square frequency-selective surface in the TEM cell validates its accuracy.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2022)
Letter
Engineering, Electrical & Electronic
Johan Malmstrom, Henrik Holter, B. L. G. Jonsson
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2018)
Article
Engineering, Electrical & Electronic
Martin Mattsson, Christos Kolitsidas, B. L. G. Jonsson
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2018)
Article
Engineering, Electrical & Electronic
O. Bjorkqvist, O. Dahlberg, G. Silver, C. Kolitsidas, O. Quevedo-Teruel, B. L. G. Jonsson
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2018)
Article
Engineering, Electrical & Electronic
Petros I. Bantavis, Christos I. Kolitsidas, Tzihat Empliouk, Marc Le Roy, B. Lars G. Jonsson, George A. Kyriacou
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2018)
Article
Engineering, Electrical & Electronic
Miloslav Capek, Lukas Jelinek, Kurt Schab, Mats Gustafsson, B. L. G. Jonsson, Fabien Ferrero, Casimir Ehrenborg
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2019)
Article
Engineering, Electrical & Electronic
Andrei Ludvig-Osipov, B. L. G. Jonsson
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Correction
Engineering, Electrical & Electronic
Andrei Ludvig-Osipov, B. L. G. Jonsson
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2020)
Article
Engineering, Electrical & Electronic
Andrei Ludvig-Osipov, Johan Lundgren, Casimir Ehrenborg, Yevhen Ivanenko, Andreas Ericsson, Mats Gustafsson, B. L. G. Jonsson, Daniel Sjoberg
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2020)
Article
Multidisciplinary Sciences
Y. Ivanenko, M. Nedic, M. Gustafsson, B. L. G. Jonsson, A. Luger, S. Nordebo
ROYAL SOCIETY OPEN SCIENCE
(2020)
Article
Engineering, Electrical & Electronic
Oskar Zetterstrom, Christos Kolitsidas, Bengt Lars Gunnar Jonsson, Andres Alayon Glazunov
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2020)
Article
Engineering, Electrical & Electronic
Boules A. Mouris, Hadi Ghauch, Ragnar Thobaben, B. L. G. Jonsson
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
B. L. G. Jonsson, Fabien Ferrero, Shuai Shi, Lei Wang
Summary: This research focuses on a small embedded planar antenna in a 25 cm(2) square-shaped terminal, aiming to demonstrate how the Q-factor bounds can be utilized to predict the antenna's performance, to determine the optimal bandwidth and efficiency variations, and to inspire antenna design by considering the impact of shape and position on both bandwidth and efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Andrei Ludvig-Osipov, Jari-Matti Hannula, Patricia Naccachian, B. L. G. Jonsson
Summary: This article investigates the bounds on the Q-factor for narrowband phased array antennas, determining the bound through a minimization problem over electric current density. These bounds apply to lossless antenna elements and can be used to determine tradeoff relations between the Q-factor and other design specifications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Johan Lundgren, Johan Malmstrom, Jari-Matti Hannula, B. L. G. Jonsson
Summary: Mutual coupling between antennas is an important parameter in antenna system design. This article generalizes the impedance density and shows how it can be used to obtain spatial information about the mutual coupling. By placing absorbers based on the generalized impedance density, it is possible to reduce the required amount of absorbers needed to obtain a certain reduction in mutual coupling. Placing absorbers based on the generalized impedance density had a larger impact on the mutual coupling compared to predictions with a Poynting vector based method.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2022)
Article
Engineering, Electrical & Electronic
Andrei Ludvig-Osipov, B. L. G. Jonsson
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2020)