Article
Computer Science, Information Systems
Riku Kormilainen, Anu Lehtovuori, Juuso Liesio, Ville Viikari
Summary: This paper proposes a novel method for designing antenna array elements and their feed weights simultaneously. The method formulates the design problem as a non-linear multi-objective optimization model and utilizes genetic algorithms to find optimal signals, impedances, and weights. Simulation and measurement results demonstrate that the method can substantially improve the scanning range compared to a reference array.
Article
Engineering, Electrical & Electronic
Zhechen Zhang, Shiwen Yang, Feng Yang, Yikai Chen, Shi-Wei Qu, Jun Hu
Summary: A novel approach for independently manipulating the in-band scattering and radiation patterns of phased arrays with high radiation efficiency is proposed. By taking advantage of the difference in antenna input impedance on scattering and radiation patterns, an array element incorporated with a biased p-i-n diode is designed. The designed phased array is capable of dynamically manipulating the scattering pattern while maintaining a stable radiation pattern, resulting in reduced in-band scattering in a broad bandwidth.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Fei Shi, Mengkai Hu, Xiuquan Dou
Summary: In this letter, an analytical method for synthesizing the beampattern of a symmetric nonuniform array is proposed. The method involves two steps: obtaining a real symmetric excitation using the convex optimization method to achieve a pencil beam, and then superposing the pencil beams pointing in different directions to synthesize the desired beampattern. Numerical results are provided to demonstrate the effectiveness of the proposed method.
ELECTRONICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Reza Fatemi, Parham P. Khial, Aroutin Khachaturian, Ali Hajimiri
Summary: This paper studies the fundamental limits and trade-offs in nano-photonic antenna design, as well as how to improve antenna structures for enhanced performance. By deviating from conventional assumptions, high-performance multi-mode antenna structures with characteristics beyond traditional perceived limits are demonstrated.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jian Zhou, Chen Pang, Zhanling Wang, Yongzhen Li, Xuesong Wang
Summary: In order to reduce the computation burden of optimal array patterns, a set of representative array patterns (RAPs) are proposed, whose number is smaller than that of active element patterns (AEPs). Each RAP corresponds to a representative beam. By optimizing the directions of these representative beams, the measured RAPs can substitute for all AEPs. Compared with using AEPs, the proposed method significantly reduces measurement cost and computation time. The stability of the proposed method under measurement errors is presented, and the method is verified on a practical C-band 4x4 dual-polarized microstrip patch array antenna.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Maodudul Hasan, Ichihiko Toyoda, Eisuke Nishiyama, Takayuki Tanaka
Summary: This paper introduces a novel active integrated array antenna (AIAA) that enables pattern switchable functionality. The AIAA consists of a Gunn oscillator, four microstrip antennas, and two switched-line phase shifters. The Gunn oscillator provides high RF power to the antenna elements through the switched-line phase shifters. The switched-line phase shifter allows for switching the main beam direction of the radiation pattern among three states without shifting its resonance frequency. Additionally, the AIAA requires fewer RF switching diodes and has a compact, cheap, and simple layout compared to previous AIAAs. Experimental evaluation shows an effective isotropic radiated power (EIRP) of +16.09 dBm at a frequency of 9.41 GHz, with cross-polarization suppression better than 15 dB in all three states.
ELECTRONICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Paul Schmalenberg, Ercan M. Dede, Tsuyoshi Nomura, Shinji Nishiwaki
Summary: This research introduces an optimization method for a vehicular volumetric beam-scanning radar to minimize sidelobe power by determining the placement of array elements. The optimization is achieved using a gradient-based nonlinear programming technique, with the speed accelerated by extending uv-projection planes. Compared to a reference triangular grid array, the optimization method allows for a larger azimuth scanning FOV in typical automotive applications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
An Li, Shi-Wei Qu, Shiwen Yang
Summary: This paper proposes a four-branch dipole antenna designed to conform to the wing of an unmanned aerial vehicle. The antenna achieves better impedance matching performance through the use of branches. Additionally, metallic coupled strips are used to address scanning blindness without affecting broadside radiation. The inclusion of metallic strip directors effectively compresses the beamwidth in the vertical plane and increases element gain. A 12-element linear phased array based on the dipole element is designed and simulated, achieving a scanning range of +/- 60 degrees in the horizontal plane with good voltage standing wave ratio. The measured results of the fabricated antenna prototype validate the feasibility of the wing-conformal linear phased array design.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Reza Karimian, Sajjad Taravati, Mansoor Dashti Ardakani, Shahrokh Ahmadi, Mona E. Zaghloul
Summary: This study introduces a nonreciprocal-beam phased-array antenna that provides power amplification in both transmission and reception states. Compared to other antenna designs, this antenna does not introduce undesired time harmonics and frequency conversion, and does not require an RF bias signal.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Ahmed Shehata Abdellatif, Wenyao Zhai, Hari Krishna Pothula, Morris Repeta
Summary: The letter discusses the challenges in realizing large millimeter-wave phased array antennas using multiple scalable arrays, analyzing the impact of tiling gap on the array radiation pattern. Various techniques are proposed to mitigate performance degradation caused by the tiling gap, utilizing element spacing or amplitude excitation to minimize the impact on array performance.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Jan Puskely, Tomas Mikulasek, Yanki Aslan, Antoine Roederer, Alexander Yarovoy
Summary: This article proposes a concept of a phased antenna array for 5G base stations based on substrate integrated waveguide (SIW) technology. The array exhibits a cosecant radiation pattern in the vertical plane to achieve uniform illumination in a sector area. It consists of 16 SIW traveling wave subarrays with 12 slot-coupled microstrip patch antennas each, associated with reflection-canceling vias and phasing elements to obtain a tapered distribution in both amplitude and phase. The array operates at 28 GHz with a bandwidth of over 10% and supports wide-angle scanning of +/-60 degrees.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Giovanni Buonanno, Sandra Costanzo, Raffaele Solimene
Summary: This study explores the possibility of using statistically thinned array antennas to obtain multiple-beam patterns. Two schemes are proposed and compared, showing good agreement between empirical data and theoretical predictions through Monte Carlo analysis. The approach avoids the adoption of simplified hypotheses and provides analytical results for synthesized radiation patterns compared to reference ones.
Article
Engineering, Electrical & Electronic
Yin-Hua Yu, Zhi-Yuan Zong, Wen Wu, Qiaoyu Chen, Min Wang, Da-Gang Fang
Summary: A 1-D wide-angle beam-scanning linear phased array using dielectric slab superstrate (DSS) to enhance gain is presented. The DSS is optimized to meet the requirements of beam widths in both scanning and orthogonal planes, leading to 3.5 dB gain enhancement in the scanning range and low side-lobe levels.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Heinrich Edgar Arnold Laue, Warren Paul du Plessis
Summary: Compressive arrays are a new technique that can improve the performance of beamforming systems by reducing the number of controls, and they have the potential to be used in various real-world applications. The study found that beam squint is a greater issue than previously assumed, and design guidelines are suggested to minimize this problem.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Yan Dong, Xiao Cai, Geyi Wen
Summary: This study proposes a 4x4 circularly polarized antenna array with suppressed sidelobes for electronic toll collection applications. The antenna array is designed using the weighted constrained method of the maximum power transmission efficiency. Different constraints are introduced to control the polarization and sidelobe levels. The optimized distribution of excitations is obtained analytically, and some elements with negligible amplitudes are removed to reduce the array size. The fabricated array meets the requirements of ETC system and demonstrates good circular polarization performance.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Yubing Han, Vanha Tran
SIGNAL IMAGE AND VIDEO PROCESSING
(2016)
Article
Engineering, Electrical & Electronic
Zhang Ren-li, Sheng Wei-xing, Ma Xiao-feng, Han Yu-bing
DIGITAL SIGNAL PROCESSING
(2016)
Article
Computer Science, Information Systems
Ming Wang, Yubing Han, Weixing Sheng
Article
Engineering, Electrical & Electronic
Lin Zhu, Shuang Qiu, Yubing Han
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2018)
Article
Engineering, Electrical & Electronic
Qi Jin, Weixing Sheng, Cheng Gao, Yubing Han
Summary: This article focuses on the coupling between the inner conductor and the shield of a coaxial cable, utilizing the IETL transfer matrix to validate this relationship. By introducing the surface transfer impedance and a three-conductor system, a representation of the transmission line equation with coupling components is obtained. Methods for calculating the radiation of a coaxial cable and the crosstalk between a coaxial cable and a bare wire are proposed and compared with results from electromagnetic calculation software.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2021)
Article
Engineering, Electrical & Electronic
Xiaoyu Cong, Yubing Han, Weixing Sheng, Shanhong Guo, Hui Sun
Summary: This paper proposes a spatial alignment method in the range-Doppler domain for networked radars without prior spatial information, and solves the optimization problem using a genetic algorithm. Simulation results show that the proposed algorithm improves the detection probability after alignment and fusion.
EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Qi Jin, Weixing Sheng, Cheng Gao, Yubing Han
Summary: The article introduces a novel cable harness routing method based on the expected maximum crosstalk, which uses a closed-form expression for crosstalk and the concept of maximum overlap length. The method involves an escape graph and a Dijkstra's algorithm variant with the maximum overlap length as a constraint to address crosstalk issues between interconnected cables.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2022)
Article
Engineering, Electrical & Electronic
Minghui Dai, Xiaofeng Ma, Weixing Sheng, Yubing Han
Summary: In this study, a mirrored coprime array (MCA) is designed to implement the sum-difference coarray (SDCA) using only spatial information. The SCA and DCA are recovered from the vectorised covariance matrix using a transform matrix, and a Tikhonov regularisation method is proposed to reduce rank-deficiency. The MCA outperforms the non-mirrored array in terms of DOA estimation accuracy and resolution.
IET SIGNAL PROCESSING
(2023)
Article
Environmental Sciences
Lei Xiao, Yubing Han, Zuxin Weng
Summary: This paper proposes a novel framework for a low-cost coding digital receiving array based on machine learning (ML-CDRA), which encodes the received full-array signals into a few radio frequency (RF) channels and decodes them in real-time using an artificial neural network. This solution addresses typical problems in existing low-cost DBF systems.
Article
Engineering, Electrical & Electronic
Jindong Zhang, Weixing Sheng, Hairui Zhu, Shanhong Guo, Yubing Han
Summary: A new marine SAR ship detection network called MLBR-YOLOX is proposed in this article, which includes a standalone spatial patch detector module for pre-detecting ship positions and filtering sea backgrounds, and a deep spatial feature detector module for reducing computational cost. Experimental results show that MLBR-YOLOX achieves comparable detection performance to YOLOX, but with much lower computational complexity.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Engineering, Electrical & Electronic
Lei Xiao, Yubing Han, Xiaofeng Ma, Minghui Dai
Summary: This paper investigates the statistical properties of the reconstruction error in greedy pursuit algorithms. It reveals that the reconstruction error follows a mixture multivariate truncated Gaussian distribution.
ELECTRONICS LETTERS
(2023)
Article
Computer Science, Information Systems
Xiaoyu Cong, Yubing Han, Weixing Sheng, Shanhong Guo, Renli Zhang
Article
Computer Science, Information Systems
Hui Sun, Mort Naraghi-Pour, Weixing Sheng, Yubing Han
