Article
Engineering, Electrical & Electronic
Lehu Wen, Steven Gao, Qi Luo, Wei Hu, Benito Sanz-Izquierdo, Xue-Xia Yang
Summary: In this paper, a wideband circularly polarized reflectarray antenna using rotational symmetrical crossed dipoles is proposed. Coupled crossed dipoles are investigated for the first time as the unit cell to achieve wideband reflection bandwidth in the antenna design. The CP reflection bandwidth is greatly improved and adjusted by controlling the coupling between the crossed dipoles, thanks to the excitation of two series resonances and two parallel resonances on the crossed dipoles. A collimated CP RA antenna with a circular aperture of 316 unit cells is designed based on this unit cell, and a wide CP bandwidth of 7.6-15.9 GHz is achieved with AR<3 dB.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Lin-Xiao Wu, Qi Hu, Xin-Yao Luo, Junming Zhao, Tian Jiang, Ke Chen, Yijun Feng
Summary: An anisotropic metasurface is proposed for independent phase control on orthogonal linearly-polarized waves and is integrated with two Vivaldi feed sources to implement a low-profile wideband dual-polarized reflectarray antenna operating in Ku-band.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Guan-Tao Chen, Yong-Chang Jiao, Gang Zhao, Chuan-Wei Luo
Summary: This paper presents a wideband high-efficiency circularly polarized folded reflectarray antenna based on CP selective surface (CPSS). The antenna design includes a simple CPSS, a wideband reflectarray plane, and a wideband planar CP antenna. The measured results show that the fabricated prototype has good performance with high gain, bandwidth, axial-ratio, and aperture efficiency, making it potentially valuable for wireless communication systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Xiong Geng, Ming Su, Yanming Zhang, Anna Wang, Chengkang Pan, Xiaochen Chen, Zheng Liu
Summary: We propose a pattern-reconfigurable liquid metal magneto-electric dipole antenna, which can achieve 15 different pattern reconstructions by using liquid metal to create parasitic units around the antenna. This antenna has high gain and efficiency, and can cover a portion of the communication frequency band, making it suitable for future communication.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Hung Luyen, Zongtang Zhang, John H. Booske, Nader Behdad
Summary: We propose a wideband reflectarray antenna with electronic beam-steering capability. The reflectarray uses an electronically reconfigurable polarization-rotating unit cell to achieve beam-steering. We construct a prototype with 256 elements to demonstrate the effectiveness of the design concept.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Bing Jie Xiang, Xin Dai, Kwai-Man Luk
Summary: This article presents a wideband 1-bit reflectarray antenna with 2-D electronically beam-scanning capability. By using a novel reconfigurable element, the antenna achieves wideband operation and variable resonance types. Results show that the antenna performs well across the operating bandwidth and is a promising candidate for intelligent reflective surface applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Qian Tan, Kwai-Man Luk
Summary: A wideband co-linearly-polarized magnetoelectric (ME) dipole antenna is proposed for in-band full-duplex (IBFD) applications, with identical radiation properties in the operating frequency band. By modifying the shared central part of the ME dipole without complex feeding structure, good isolation between the transmitting and receiving ports is achieved over a wide frequency range. A prototype is fabricated and measured to validate the proposed antenna, with measured port isolation higher than 22 dB over the operating frequency band from 1.90 to 2.91 GHz (42.0%). The proposed antenna has a simple structure and good wideband radiation performance, showing high potential for IBFD applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Binchao Zhang, Cheng Jin, Qihao Lv, Jianhong Chen, Yue Tang
Summary: This study introduces a wideband high-efficiency reflectarray antenna with a low radar cross section based on metal pillars inserted absorptive frequency-selective reflector. The antenna has high aperture efficiency from 6 to 8 GHz and successfully reduces the radar cross section.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Pan-Pan Zhang, Xi-Cheng Zhu, Yun Hu, Zhang-Cheng Hao, Guo-Qing Luo
Summary: This letter presents the design and implementation of a wideband circularly polarized folded reflectarray antenna (CPFRA) with a linearly polarized (LP) feed antenna. The CPFRA utilizes a polarization-sensitive frequency selective surface (FSS) and sequential rotation technique to achieve wideband operation and enhanced axial ratio (AR) bandwidth.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Wen Wu, Kai-Da Xu, Qiang Chen, Toru Tanaka, Masaki Kozai, Hiroya Minami
Summary: This study presents a single-layer wideband low-cost linearly polarized reflectarray using 1 bit magnetoelectric (ME) dipoles as unit cells. The 180 degrees reflection phase difference for the unit cell is achieved by switching the ground-signal-ground (GSG) transmission line between open and short in the ME dipole structure. Numerical simulations show that the bandwidth of the reflection phase difference exceeds 34% under both normal and oblique incidences. The measured results of the reflectarray prototypes demonstrate a great advantage of wideband performance.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Wentao Yuan, Jingjian Huang, Xiaofa Zhang, Kaibo Cui, Weiwei Wu, Naichang Yuan
Summary: This letter describes a novel design for a radiation pattern-reconfigurable antenna based on a wideband Vivaldi antenna structure. By switching the feeding paths, two different radiation patterns, monopole mode and Vivaldi mode, can be achieved. The bias voltage of pin diodes can be controlled to adjust the radiation patterns, generating a broad coverage of reconfigurable pattern. Additionally, the pattern-reconfigurable antenna operates at a wide frequency band from 2.7 to 12 GHz. Simulated and experimented results for the antenna are presented.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Liang-Hua Ye, Li Yuanjun, Duo-Long Wu
Summary: This paper proposes a dual-wideband dual-polarized dipole antenna for base-station applications, which demonstrates wideband performance, stable radiation patterns, and potential attractiveness in mobile communications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xi Li, YaYa Luo, GengMing Wei, XiangJie Yi
Summary: This study presents a broadband linearly polarized single-layer reflectarray antenna constructed with spiral-dipole element cells, achieving a linear and smooth phase response by continuously adjusting the two degrees of freedom elements to enlarge the operating bandwidth. Experimental results demonstrate that the antenna has good gain performance and high aperture efficiency at 8 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Peter Callaghan, Pavlos Giannakou, Simon G. King, Maxim Shkunov, Paul R. Young
Summary: A simple, low-cost, linearly polarized reconfigurable reflectarray surface is introduced in this study, allowing for beam steering over a wide range of angles in one plane. The technology has great potential for widespread deployment in wireless systems and can aid system designers with simple equations for design and manufacturing using screen-printing techniques.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Yingzhou Tian, Jun Ouyang, Peng Fei Hu, Yongmei Pan
Summary: A wideband circularly polarized endfire antenna based on substrate integrated waveguide has been proposed for millimeter-wave applications. The antenna exhibits a wide impedance bandwidth, a good axial ratio bandwidth, and a high gain.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Hao Chen, Fan Wu, Jingyang Cao, Ronan Sauleau, Wei Hong
Summary: In this paper, a dual-circularly polarized multibeam transmit-array antenna is proposed using anisotropic impedance surfaces and hybrid phase compensation strategy. The antenna array consists of eight planarized transmit-array cells with constant dynamic phase difference and Berry phase determined rotation angles. The measured results show that the antenna generates eight RHCP beams and eight LHCP beams with high peak gain values and low axial ratio.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Bangjie Zhang, Gang Xu, Rui Zhou, Hui Zhang, Wei Hong
Summary: A high-resolution MIMO SAR imaging algorithm is proposed in this paper based on Doppler-division multiplexing. A novel multi-channel back-projection approach is presented for coherent multi-channel image integration, effectively addressing the problem of near-field and wide-angle focusing. The proposed algorithm is validated using real-measured data from an automotive radar system with a two-transmitter-eight-receiver array.
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Yingsong Zhang, Wei Hong, Zhidan Ding, Long Yang, Cheng Zhu, Yun Hu
Summary: In this article, a millimeter-wave LHCP 1 x 32 with a dummy on both sides phased array antenna is proposed. The antenna utilizes a multilayer structure and single feed, with a metasurface patch of 3 x 3. The measurements show an impedance bandwidth of 20%, from 22.5 to 27.5 GHz, and an axial ratio bandwidth of 3.35 GHz, ranging from 24.15 to 27.5 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Letian Wen, Tianxiang Ji, Yaoming Huang, Tianyang Cao, Zhiqiang Yu, Chao Chen, Liyu Zhu, Jianyi Zhou, Wei Hong
Summary: This article presents a method of integrating the sub-6 GHz antenna and the millimeter-wave antenna in one radiating aperture to support different frequency bands for communication systems. The proposed antenna demonstrates dual-polarized radiation in the frequency band from 3.45 to 3.58 GHz and +/- 45-degree scanning in both azimuth and elevation in the frequency band from 24.5 to 27 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Lei Sang, Zhiwei Hu, Shaoran Wu, Wen Huang, Hao Tu, Wei Wang, Peng Chen, Wei Hong
Summary: In this article, a novel dual-band planar antenna array is proposed to solve the contradiction between large element size in the Sub-6 band and narrow element spacing in the mmW band in 5G communication. The measured results show that the antenna array is able to satisfy the requirements of both carrier bands.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Xuanfeng Tong, Zhi Hao Jiang, Yuan Li, Fan Wu, Jianjun Wu, Ronan Sauleau, Wei Hong
Summary: This paper proposes an integrated dual-band dual-circularly polarized transmit-array antenna for K- and Ka-bands. Antenna-filter-antenna based polarization twisting TA cells are designed to achieve efficient circular-polarization transmission without using phase shifting lines. The dual-band dual-CP transmissive beamforming characteristics are realized by arranging K- and Ka-band cells in the same aperture and employing a hybrid phase compensation strategy. The measured results show that the antenna has independently controllable dual CP beams in K-band and Ka-band.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Liyu Zhu, Shilin Yang, Tianyang Cao, Yaoming Huang, Tianxiang Ji, Jing Wang, Jun Xu, Zhiqiang Yu, Jianyi Zhou, Wei Hong
Summary: This brief proposes a design method for manufacture-friendly millimeter-wave (mm-Wave) folded substrate integrated waveguide (FSIW) bandpass filters (BPFs). By introducing conventional magnetic post-wall iris structure, etched parallel rectangular slots, and an incompletely folded structure as internal coupling structures, a design method is proposed to achieve lower fabrication errors and reduce sensitivity to them. A designed FSIW BPF based on multilayer printed circuit board (PCB) using the proposed method demonstrates higher simulation-to-fabrication performance accuracy compared to a regular one, making it a promising candidate for mm-wave applications.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Letian Wen, Zhiqiang Yu, Chao Chen, Liyu Zhu, Jianyi Zhou, Wei Hong
Summary: This letter proposes an evanescent quad-ridge antenna (EQA) for 5G millimeter-wave phased-array applications. The EQA uses an evanescent-mode quad-ridged square waveguide (QRSW) filter with a cross-shaped slot as the radiator. It is fed by a compact transition utilizing coupling between circuits on a multilayer printed circuit board (PCB) and metal ridges in the QRSW. The antenna achieves compact size, filtering function, and easy integration with active circuits, making it suitable for 5G mm-wave phased-array applications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Chao Chen, Jixin Chen, Jianyi Zhou, Letian Wen, Wei Hong
Summary: A millimeter-wave printed ridge gap waveguide fed filtering metasurface antenna array is proposed for 5G applications. The metasurface element utilizes a parasitic loop and stacked patch to achieve satisfactory lower stopband performance as well as in-band resonance. Moreover, the introduction of two square-ring slots on the metasurface generates an upper edge radiation null, further improving the suppression level. Thus, desirable filtering characteristics are achieved without the need for additional filtering circuits. A 1 x 4 filtering metasurface antenna array is fabricated and tested, demonstrating an overall bandwidth of 27.2% within |S-11| < -10 dB, an average tested gain of about 11.1 dBi, and gain suppression exceeding 27 dB outside the passband.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yuanwei Zhu, Kai Chen, Si-Yuan Tang, Chao Yu, Wei Hong
Summary: A novel ultrawideband millimeter wave slotted circular patch antenna and array with enhanced bandwidth are proposed. The antenna elements are loaded with folded strips and fed by a substrate-integrated waveguide. An 8 x 8 antenna array prototype is designed and fabricated with measured large impedance fractional bandwidth and average radiation efficiency.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Civil
Mengjie Jiang, Gang Xu, Hao Pei, Zeyun Feng, Shuai Ma, Hui Zhang, Wei Hong
Summary: A novel algorithm is proposed in this study for generating 4D high-resolution imagery of point clouds with extremely high Doppler and angle resolutions in the community of automotive millimeter wave radar. The algorithm utilizes a dual pulse repetition frequency waveform design and an innovative time-division multiplexing & Doppler-division multiplexing MIMO framework to address the high Doppler resolution issue. Additionally, an attractive complex-valued deep convolutional network for super-resolution direction-of-arrival estimation is proposed using single-frame data. Experimental analysis in a parking lot confirms the effectiveness of the proposed super-resolution DOA estimation algorithm, and 4D high-resolution imagery of point clouds is obtained.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Xian-Long Yang, Xiao-Wei Zhu, Xiang Wang, Wei Hong
Summary: In this article, a general method for implementing flexible filter design based on nested substrate integrated waveguide (SIW) circular cavity and cambered cavity is proposed. The cambered cavity's unique physical structure allows for additional coupling between nonadjacent resonators, resulting in additional transmission paths and cross-coupling. The cambered cavity can be divided into any angle to increase the topology order and enable a more flexible topology. Single-band, dual-band, and triple-band bandpass filters with wide stopband can be implemented. Filtering power dividers with controllable transmission zeros can also be realized. The measured results demonstrate the feasibility and universality of the designs.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Geochemistry & Geophysics
Yuan Mao, Yan Huang, Xutao Yu, Yu Xin, Yunxuan Wang, Wei Hong
Summary: Synthetic aperture radar (SAR) is an active imaging radar used to obtain high-resolution wide-swath SAR images. However, it is susceptible to radio frequency interference (RFI) from other electromagnetic systems, which can reduce imaging quality. To mitigate RFI, researchers have proposed a novel adaptive method that combines semi-parametric and frequency-domain notched filter methods, effectively dealing with strong RFIs and protecting strong scatterers.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Engineering, Electrical & Electronic
Hao Pei, Mingjie Su, Gang Xu, Mengdao Xing, Wei Hong
Summary: This study proposes a two-stage algorithm based on contrastive learning for SAR image target classification. In the pretraining stage, high-level semantic features are extracted from an unlabeled train set using self-supervised representations. In the fine-tuning stage, a few labeled samples are used to train the classifier. Numerical experiments demonstrate that the proposed algorithm performs better than traditional supervised methods under labeled data constraints.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Engineering, Electrical & Electronic
Rui Zhou, Jixin Chen, Zekun Li, Jiayang Yu, Dawei Tang, Wei Hong
Summary: This article presents a prototype of a sub-THz power amplifier utilizing a coupled-line-balun network, with the proposed modified design method achieving optimum load impedance matching and power combining simultaneously. The experimental results show high gain and efficiency.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
