Article
Engineering, Electrical & Electronic
Yuqiu Shang, Jiaxing Sun, Changfei Zhou, Hui Li, Di Wu, Qingsheng Zeng
Summary: A novel broadband low-profile circularly polarized (CP) magneto-electric (ME) dipole antenna is proposed, which combines a pair of electric dipoles (E-dipoles) and a pair of magnetic dipoles (M-dipoles) through four bulges in the corners of the ring. The dipole and slot antennas are excited simultaneously using a pair of vacant-quarter printed rings with short-end microstrip lines. The antenna achieves wide overlapped impedance and axial ratio bandwidth, as well as high gain and stable radiation patterns for wireless communication.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Computer Science, Information Systems
Son Trinh-Van, Youngoo Yang, Kang-Yoon Lee, Keum Cheol Hwang
Summary: This article presents the design of a low-profile CP magneto-electric dipole antenna with enhanced CP bandwidth properties. The antenna is excited by a microstrip line aperture-coupled structure and utilizes crossed slots and parasitic elements to achieve CP operation and improve impedance and axial ratio bandwidth.
Article
Engineering, Electrical & Electronic
Kang Ding, Yujian Li, Yan Li, Yanjie Wu, Jian-Feng Li
Summary: This paper presents a magnetoelectric (ME) dipole antenna with wideband circularly polarized (CP) and gain-improved performance. By connecting one pair of sub-ME dipole with metallic strip, CP operation is achieved at lower band first. Then, the coupling slot is changed from rectangle to cross to enhance impedance and axial-ratio (AR) bandwidth. Furthermore, a helix with different turn radii and uniform turn spacing is introduced to improve the gain in the whole band. The proposed design's performance is verified by measured results.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
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
Computer Science, Information Systems
Binlong Shi, Xiaowei Cao, Changjiang Deng
Summary: This work proposes a new circularly polarized (CP) 4 x 4 magneto-electric (ME) dipole antenna array using metallic walls for 28 GHz band applications. By introducing metallic walls, the 3-dB axial ratio (AR) bandwidth of the element is increased from 23% to 36.5%. The experimental 3-dB AR bandwidth of the array achieves 30.1%, ranging from 22.5 to 30.5 GHz.
Article
Engineering, Electrical & Electronic
Heesu Wang, Ikmo Park
Summary: In this work, a novel circularly polarized dipole antenna fed by modified quadrature hybrid couplers is proposed. The antenna achieves wide axial ratio bandwidth and stable radiation patterns by using a modified QHC with minimal variation in the phase and amplitude difference between the output ports over a wide frequency range. The antenna demonstrates good performance parameters including impedance bandwidth, AR bandwidth, and relatively small size.
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
Xin Dai, Geng-Bo Wu, Kwai-Man Luk
Summary: A wideband circularly polarized (CP) transmitarray antenna (TA) is proposed for millimeter-wave applications. The CP TA is designed by combining a linearly polarized (LP) magnetoelectric (ME)-dipole antenna with a CP antenna. The proposed CP TA achieves a high gain of 25.6 dBic at 33 GHz with a peak aperture efficiency of 44% and a 3 dB gain bandwidth of 33.8%.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Qingquan Tan, Kuikui Fan, Weiliang Yu, WenLei Wang, Leilei Liu, Guo Qing Luo
Summary: This letter presents a wideband CP ME-dipole antenna array with outstanding performance for mmW applications, making it a potential candidate for mmW and satellite communications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Fan Wu, Jingxue Wang, Yan Zhang, Wei Hong, Kwai-Man Luk
Summary: This study presents a broadband circularly polarized reflectarray operating at X-band, realizing broadband cophasal far-field radiation with asymmetric dual-polarized magneto-electric dipoles. The reflected prototype achieves high-purity circular polarization, with a peak gain of 25.4 dBic and peak aperture efficiency of 60%. The proposed element can be easily realized on a low-profile single-board substrate configuration, making it suitable for various applications including broadband satellite communications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Rui Xu, Jie Liu, Kun Wei, Wei Hu, Zi-Jian Xing, Jian-Ying Li, Steven Shichang Gao
Summary: This article presents a low-profile high-efficiency dual-band circularly polarized (CP) antenna and its array for RFID reader applications. The use of a novel dual-band antenna element and an artificial magnetic conductor (AMC) improves antenna performance, while a rotated sequential phase feed CP array achieves wider 3 dB axial ratio bandwidths. The new antenna array has a simpler configuration and wider axial ratio bandwidths compared to previous dual-band CP reader antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Yang-Dong Yan, Yong-Chang Jiao, Chi Zhang, Yi-Xuan Zhang, Guan-Tao Chen
Summary: A circularly polarized antenna with wide axial-ratio beamwidth and half-power beamwidth is designed by arranging two curved patch dipole pairs orthogonally in a cruciform contour conforming with a hemispheric shell, resulting in improved impedance bandwidth and reduced size. The prototype achieves good performance within the frequency range of 1.06-1.89 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Lei Xiang, Fan Wu, Zhuo-Wei Miao, Zhi Hao Jiang, Chao Yu, Wei Hong
Summary: This paper presents a wideband circularly polarized (CP) transmitarray antenna (TA) operating at the X-band. The proposed receive-and-transmit-type anisotropic magnetoelectric (ME) dipole serves as the broadband TA unit cell with low-insertion-loss characteristics. By applying the element rotation methodology, continuous transmissive phase compensation is achieved, resulting in high-gain directive radiation. The designed 16 x 16 element CP TA showcases wide measured gain bandwidths, notable axial ratio (AR) bandwidth, as well as high peak gain and aperture efficiency.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Tu Tuan Le, Yong-Deok Kim, Tae-Yeoul Yun
Summary: This paper presents a compact broadband circularly-polarized wearable antenna for off-body communications in wireless body area networks (WBANs). The antenna consists of two substrates and utilizes parasitic elements and innovative design to address common issues in wearable antenna design, while maintaining wearer comfort and improving antenna performance.
Article
Engineering, Electrical & Electronic
Jun Hu, Hang Wong, Lei Ge
Summary: This study presents the design of a multibeam transmitarray for millimeter-wave applications, which can generate directive circularly polarized beam radiation with improved axial ratio performance and wide frequency response. The designed bifocal strategy achieves small scanning loss and the performance is verified through experiments.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Guang-Yu Zhu, Wei-Dong Li, Wei Hong
Summary: In this paper, an integral equation-based overlapping domain decomposition method enhanced with Anderson acceleration is proposed for solving electrically large electromagnetic problems with limited memory capacity. The proposed method improves the convergence behavior and can handle cases where the traditional method diverges.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yunli Li, Fan Wu, Dingwei Xi, Zhihao Jiang, Chao Yu, Wei Hong
Summary: This paper proposes a compact dual-polarized endfire antenna array for 5G millimeter-wave applications. The antenna unit consists of an open-ended substrate integrated waveguide (SIW) cavity for vertically polarized (VP) radiation, and a broadband electric dipole for horizontally polarized (HP) radiation. By sharing the side walls of two neighboring SIW channels, a compact size of the final antenna array is achieved. A linear array with four units is designed and fabricated, with an impedance bandwidth of 24.8 to 29.2 GHz and a maximum gain of 10.0 dBi for both polarizations. The proposed design offers a compact configuration and a wide scanning range, making it suitable for 5G mmWave terminal applications.
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
Yunxuan Wang, Yan Huang, Cai Wen, Xiao Zhou, Jiang Liu, Wei Hong
Summary: In this article, an interference mitigation optimization problem is designed to extract the target echoes with a row-sparse constraint. The effectiveness of the proposed method is demonstrated through numerical simulations and multiple practical scenes.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Zhengbo Jiang, Yalan Xu, Chong Guo, Wentao Zhao, Yun Hu, Zhang-Cheng Hao, Wei Hong
Summary: This article proposes a trigger-free multi-active-probe anechoic chamber system (MAPAC) for 5G/6G millimeter wave (mmWave) OTA testing. The system allocates transmitting and receiving probes separately to avoid the need for uplink/downlink switching signals. Simulations are conducted to determine essential design parameters, and a novel dual-polarization active probe with independent antennas is developed. Experimental verification shows the accuracy and potential applications of the trigger-free mmWave MAPAC.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Zhuo-Wei Miao, Xing Liu, Zhang-Cheng Hao, Yongbin Zeng, Chen-Yu Ding, Wei Hong
Summary: This article proposes a 0.9-THz integrally manufactured sixth-order bandpass waveguide filter with high-dimensional accuracy, low surface roughness, and perfect verticality of sidewalls, using electrochemical micromachining (ECMM) technology. The maximum manufacturing tolerance for the fabricated filter prototype is well controlled within 1.5 mu m. The measured electromagnetic responses indicate that high-performance THz metallic waveguide components can be constructed with the aid of the proposed ECMM technology.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Yan Zhang, Gan Wang, Wei Hong
Summary: A broadband TE10-TE30 mode converter is designed and implemented using the substrate integrated waveguide (SIW) technique. It can generate a single TE30 mode guided wave with high conversion efficiency. The converter consists of a power divider, a phase shifter, and a mode combiner. The TE30 mode propagation and mode conversion are verified, and the results show a broad bandwidth of 11.28-14.8 GHz with high conversion efficiency and mode purity greater than 95%. This mode converter has potential for planar integration with microwave and millimeter-wave circuits.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Wei Li, Jun Xu, Renrong Zhao, Wei Hong
Summary: This article presents a compact broadband 16-way 2-D Butler matrix-based beamforming network using multilayer substrate-integrated coaxial line (SICL). The proposed network achieves miniaturization and wide bandwidth by combining a vertical-plane 4 x 4 BM with a horizontal-plane 4 x 4 BM. A multilayer interconnection structure and a miniaturized 3-dB coupler are used in constructing the vertical-plane BM. Compared to previously reported 16-way 2-D BFNs, the proposed one has a wide operating band and a compact footprint.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Peng Chen, Rui-Jia Liu, Luqi Yu, Ziming Zhao, Xiao-Wei Zhu, Debin Hou, Jixin Chen, Chao Yu, Wei Hong
Summary: This article proposes a simplified method to emulate the active load modulation between the carrier and peaking transistors in a Doherty power amplifier (DPA) design based on large-signal simulations. The proposed method considers the nonlinear interaction between the load-modulated transistors, providing the advantages of predicting their real-world performance and synthesizing optimum load-modulation trajectories in a DPA design. The measured results of a designed mmWave GaN MMIC DPA show high power-added efficiency, saturated output power, and low adjacent channel power ratio levels when tested with a modulated signal using digital predistortion.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Xiaoyue Xia, Zuojun Wang, Zekun Li, Sidou Zheng, Dawei Tang, Debin Hou, Wei Hong
Summary: This letter presents a 26/38-GHz dual-band filtering balanced power amplifier (PA) using 100-nm GaAs process. The proposed PA achieves high output power, good out-of-band rejection, and dual-band impedance matching through the use of dual-band branch-line couplers. It demonstrates a saturation output power (P-sat) of 27.7/26.9 dBm, output 1-dB compression point (OP1dB) of 27.1/25.6 dBm, peak power-added efficiency (PAE) of 31.5%/22.8%, and small signal gain of 22.4/15.8 dB at 26/38 GHz. The PA also exhibits strong small signal suppressions of 45, 54, and 40 dBc at frequencies of 12, 34, and 45 GHz, respectively. Due to its impressive performance in the 5G band and out-of-band rejection, the proposed PA holds potential for 5G applications.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Geochemistry & Geophysics
Bangjie Zhang, Gang Xu, Hanwen Yu, Hui Wang, Hao Pei, Wei Hong
Summary: This article proposes a novel robust gridless compressed sensing (RGLCS) algorithm for high-resolution 3-D imaging. The algorithm uses atomic norm minimization to model the joint-sparsity pattern on elevation distribution between adjacent pixels, and models outliers and disturbances as sparsely distributed spike noise in the image domain. Experimental results validate the effectiveness of the proposed algorithm.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(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
Engineering, Electrical & Electronic
Ren Rong Zhao, Yuanwei Zhu, Xiao-Wei Zhu, Peng Chen, Jianfeng Zhai, Chao Yu
Summary: This letter proposes a stable-sample-level-based digital predistortion technique for 2-D phased array, which can control the sample level stability during beam steering and relax the requirement of feedback dynamic range.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
