Article
Engineering, Multidisciplinary
Fuguo Zhu, Jinping Zhang, Donghai Xu, Lei Sun, Zhipeng Zhou
Summary: This paper presents the design of an active phased array antenna for the Gaofen-3 satellite, including its architecture, system design methods, key hardware, and performance characteristics. The proposed phased array antenna has various capabilities and exhibits excellent performance in ground and on-orbit tests.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Geochemistry & Geophysics
Eiichi Yoshikawa, Tomoo Ushio, Hiroshi Kikuchi
Summary: The study demonstrated that the comb beam transmission approach, combined with digital beamforming receiver, can improve the performance of phased array weather radars, reduce volume scan time, and enable simultaneous observations in multiple directions.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Chemistry, Analytical
Paolo Rocca, Nicola Anselmi, Mohammad Abdul Hannan, Andrea Massa
Summary: This paper addresses the design of conical frustum phased array antennas for air traffic control radar systems. The array architecture, controlled by a fully digital beam-forming network, consists of a set of equal vertical modules that generate multiple instantaneous beams pointing along different directions. The synthesis problem is formulated in the Compressive Sampling framework, and the positions of the array elements and complex excitations for each beam are determined using a customized version of the Bayesian Compressive Sampling tool. Representative numerical results validate the design strategy and demonstrate the effectiveness of the synthesized modular sparse array architecture compared to conventional arrays with uniformly-spaced elements.
Article
Optics
Zhi Li, Zihan Zang, Zixian Wei, Yaqi Han, Lican Wu, Zhenquan Zhao, Mutong Li, H. Y. Fu
Summary: The infrared optical wireless communication system utilizes passive diffractive optics and virtually imaged phased array technology to achieve multi-user accessibility and high-speed data transmission. By generating multiple beams and tuning the wavelength, the system demonstrates improved performance and flexibility.
Article
Chemistry, Multidisciplinary
Antonios Constantinides, Haris Haralambous
Summary: In a research project investigating HF interference, an upgraded HF antenna array was designed and constructed to overcome the issue of traditional antenna size. By optimizing the design and installing amplifiers, the antenna performance was improved. The antenna needed electronic beam steering and easy polarization adjustment, while also being lightweight and compact to fit space constraints at the monitoring site.
APPLIED SCIENCES-BASEL
(2021)
Article
Computer Science, Information Systems
Hyungwoo Kim, Jinwoo Kim, Jinha Kim, Jaeyoung Choi, Sangpyo Hong, Nammoon Kim, Byungkwan Kim
Summary: This paper proposes a new calibration method for wideband signal beamforming in radar systems. The method utilizes the concept of the sliding window algorithm for linear frequency modulated (LFM) signals to calibrate the frequency-dependent errors and time delay error in the system. The proposed method is compared with the conventional matched filter-based calibration and verified through simulation results and beampatterns.
Article
Geochemistry & Geophysics
Sigurd Huber, Marwan Younis, Gerhard Krieger, Alberto Moreira
Summary: This article discusses the performance of digital beamforming systems in the presence of phase and magnitude errors in the digital channels, compare direct-radiating phased arrays with array-fed reflector antenna-based systems, finding that phased arrays are more susceptible to errors leading to faster degradation of imaging performance.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Engineering, Aerospace
Jingjing Zhu, Shengqi Zhu, Jingwei Xu, Lan Lan, Xiongpeng He
Summary: In this article, a novel dual-mode array radar scheme is proposed to achieve unambiguous range and angle estimation of the signal-of-interest. The proposed approach combines phased array and frequency diverse array to take advantage of high transmit gain and resolving range ambiguity. Two cooperative parameter estimation algorithms are derived, and the Cramer-Rao bounds are studied to verify the performance of parameter estimation.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Aerospace
Esmaeil Kavousi Ghafi, Seyed Ali Ghorashi, Esfandiar Mehrshahi
Summary: This article introduces a novel method for reconfiguring antennas to achieve desired beam patterns through multiple steps. By turning off the least important antennas and maintaining a predefined number of antennas, the proposed method outperforms existing methods in terms of beam-pattern matching and computational complexity.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2021)
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
Chemistry, Analytical
Minseok Kang, Jaemin Baek
Summary: In this paper, an efficient APS approach for controlling the sidelobe level is proposed. By performing Fourier transform on the projection of the waveform pattern onto the mask template, a set of element excitations is calculated, which can be used to synthesize the desired array pattern. This approach achieves substantial improvements in computation complexity, performance, and ease of implementation compared to conventional methods.
Article
Engineering, Electrical & Electronic
Mohammad-Hossein Golbon-Haghighi, Mirhamed Mirmozafari, Hadi Saeidi-Manesh, Guifu Zhang
Summary: A cylindrical dual-polarization phased array antenna has been proposed for weather surveillance radars, offering improved performance by replacing the patch antenna with crossed dipole elements. This antenna design reduces sidelobe levels, improves copolar beam matching, and provides further optimization through particle swarm optimization and adaptive null steering. The proposed antenna can benefit national weather radar networks by providing accurate multiparameter measurements for reliable observation of severe weather phenomena.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Artificial Intelligence
Zhenkai Zhang, Hamid Esmaeili Najafabadi, Henry Leung, Biao Jin
Summary: This paper proposes a joint array resource allocation and transmit beamforming approach for tracking multiple targets using phased array radar. The optimization problem is solved to allocate array resources and develop beamforming with null steering capability. A cyclic algorithm scheme is proposed to tackle the challenging optimization problem, separating it into two simpler convex problems, and the projected gradient descent method with penalty function is applied for the optimal beamforming design with null steering.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Ye Yuan, Wei Yi, Lingjiang Kong
Summary: This paper presents a joint tracking sequence and dwell time allocation strategy for multi-target tracking based on phased array radars, considering interleaved target tracking and searching and using a time-aware posterior Cramer-Rao lower bound to quantify tracking performance.
Article
Geosciences, Multidisciplinary
Daniel T. Trugman, Shanna X. Chu, Victor C. Tsai
Summary: The spatial patterns of earthquake ground motion amplitudes exhibit primarily double-couple characteristics at low frequencies, but at higher frequencies, there are significant isotropic and residual components present. This suggests complexity in the rupture process or local fault zone structure.
GEOPHYSICAL RESEARCH LETTERS
(2021)
