Article
Engineering, Electrical & Electronic
Kun Duan, Ke Chen, Tian Jiang, Junming Zhao, Yijun Feng
Summary: In this letter, a frequency-selective radome capable of providing ultrawide transmission and low-scattering band for arbitrarily polarized waves is proposed. The radome consists of two lossy layers and a bandpass frequency selective surface, achieving absorption above the L-band and diffusion on the upper side of the passband. The measured results show a desired transmission window and a wide low-scattering band.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yudi Fan, Da Li, Hanzhi Ma, Jiaqi Xing, Yijie Gu, Lay Kee Ang, Er-Ping Li
Summary: This communication proposes an ultrawideband dual-polarized frequency-selective absorber with a tunable reflective notch. The structure consists of a broadband absorber and a tunable lossless frequency-selective surface. The reflective notch can be tuned with varactors and a dc bias. The measured results of the prototype show good agreement with the simulated results.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Hao Huang, Changzhou Hua, Zhongxiang Shen
Summary: The integration of frequency-selective surfaces (FSSs) and microwave absorbers overcomes the limitation of transmission band within the absorption band, achieving absorption-transmission-absorption frequency response. This is done by integrating a bandpass FSS and wideband absorber to introduce a low insertion loss transmission window within the absorption band, while minimizing insertion loss in the passband with a bandstop FSS.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Qihao Lv, Cheng Jin, Binchao Zhang, Zhongxiang Shen
Summary: This article introduces a hybrid absorptive-diffusive frequency-selective radome design with absorption and diffusion capabilities in a broadband transmission window. Experimental results show that a wide transmission band with low insertion loss was achieved within a band of low reflectivity.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Lin Zhou, Zhongxiang Shen
Summary: The article proposes an absorptive energy-selective structure based on a 3D structure mounted with p-i-n limiter diodes for high-power electromagnetic protection and low reflection. By constructing separate transmission and absorption paths, the structure achieves high-efficiency transmission under low-power incidence and high shielding effectiveness under high-power incidence. The fabricated absorptive ESS demonstrates good agreement between simulated and measured results, achieving high transmission efficiency, shielding effectiveness, and low reflection at the operating frequency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Cheng Huang, Jiakun Song, Chen Ji, Jianing Yang, Xiangang Luo
Summary: The paper presents a tunable radar absorber based on graphene and varactor, which can independently control the absorption amplitude and frequency, and has polarization-insensitive characteristics.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Peter Njogu, Benito Sanz-Izquierdo, Zhijiao Chen, Edward A. Parker
Summary: A novel displacement sensor based on a frequency selective surface (FSS) with a removable substrate complement is proposed. It modifies the effective permittivity of the FSS to produce a change in capacitance and resonant frequency. The sensor is passive, compact, inexpensive, and easy to operate, and has potential applications in wireless detection of structural movement and earthquake monitoring.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Lin Zhou, Zhongxiang Shen
Summary: This article proposes a diffusive energy-selective surface (ESS) that provides high-power electromagnetic (EM) protection and low backscattering simultaneously. By properly designing unit cell structures, the ESS is almost transparent to low-power incident waves while fully rejecting high-power incidences. The chessboard configuration of the ESS unit cells diffuses the rejected high-power waves into other directions, resulting in low backscattering. A diffusive ESS operating at 3 GHz is designed and experimentally verified, showing good agreement between simulation and measurement. The ESS achieves low-power transmission and high-power diffusive backscattering, demonstrating its potential for practical applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Youngno Youn, Daehyeon Kim, Suho Chang, Jaehyun Choi, Wonbin Hong
Summary: This communication presents the concept of a scattering mitigation frequency-selective surface (FSS) for compensating unidirectional blockages without modifying the obstacles. The proposed FSS generates a complementary electric field to the blockage, making it transparent to the antenna. Experimental results demonstrate improved main beam peak gain and restored far-field radiation patterns in various scattering scenarios.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Multidisciplinary Sciences
Zheyipei Ma, Chao Jiang, Jiale Li, Xiaozhong Huang
Summary: A high-absorption and dual-transmission-bands rasorber (HADTR) is proposed in this paper. By adding a foam layer and a FR4 layer as top layers, the absorption and oblique incidence performance of HADTR are improved. The HADTR has dual-transmission-bands due to the specific circuit structure design.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Chol-Song Ri, Hye-Jong Yun, Song-Jin Im, Yong-Ha Han
Summary: This paper focuses on the bandwidth analysis of a resistive frequency selective surface (FSS) in a microwave metamaterial absorber, with a particular emphasis on how to design the FSS pattern to achieve the largest bandwidth in the case of thicker dielectric substrates. By investigating the relationship between the bandwidth and the FSS reactance, explicit expressions of the FSS reactance for the largest bandwidth are revealed. The findings provide design guidance for achieving the largest bandwidth in the FSS patterns of perfect absorbers.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Soumik Dey, Sukomal Dey, Shiban K. Koul
Summary: This communication presents a miniaturized low-profile second-order bandstop frequency selective surface (FSS) for single- and dual-band resonances. The proposed FSS exhibits a wide stopband and has polarization insensitive and high angular stable filter response. Additionally, a four-unit cell element FSS is designed for dual-band resonances.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Fan He, Kaixuan Si, Rui Li, Dace Zha, Jianxiong Dong, Ling Miao, Shaowei Bie, Jianjun Jiang
Summary: In this study, a method for designing and fabricating a dual-section step-impedance frequency selective surface absorber for oblique incidence applications is proposed. The absorber structure has a wide absorption band and wide scan angle, making it competitive in practical applications. The dielectric layers were fabricated with a honeycomb structure to ensure high structural strength and low weight, validating the design principle and fabrication process.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Umer Farooq, Adnan Iftikhar, Muhammad Farhan Shafique, Muhammad Saeed Khan, Adnan Fida, Muhammad Juanid Mughal, Dimitris E. Anagnostou
Summary: This paper introduces a highly compact frequency-selective surface (FSS) with the potential to switch between the X-band and C-band for RF shielding applications. The proposed FSS design offers equal RF shielding performance for different polarizations, with small unit cell size and excellent angular stability. The incorporation of PIN diodes between adjacent elements allows for band switching, with a biasing network on the bottom layer to prevent interference with shielding performance.
Article
Engineering, Electrical & Electronic
Zhaowang Cao, Haoran Li, Yi Wu, Gengjiang Yao, Yong Zhao, Ze Huang, Sai Guo, Ling Miao, Jianjun Jiang
Summary: This communication introduces the new design concept of backend-balanced-impedance (BBI) for expanding absorption bandwidth. A simple and efficient ultra-wideband absorber derived from a known absorber is proposed based on this concept. The operating principle is explained using an equivalent circuit model and the physical pictures of the BBI are demonstrated through the analysis of electric field and surface loss distribution. Simulation and measurement results show that the designed ultra-wideband absorber from the BBI achieves at least 10 dB reduction in reflection in the 0.87-9.28 GHz range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
