Article
Engineering, Aerospace
Yazan Youssef, Hasan S. Mir, Lutfi Albasha, Kainam Thomas Wong
Summary: The recently proposed equivalent transmit beamforming (ETB) scheme effectively forms a beampattern that highlights a specific spatial location in the far field. However, the pioneering ETB method is computationally challenging in time-sensitive scenarios. This article presents a lower complexity scheme for ETB based on convex optimization with reduced degrees of freedom, allowing for simultaneous illumination/suppression of multiple designated spots while maintaining a finer spatial resolution in the beampattern. Numerical simulations are conducted to verify the efficacy of the proposed approach.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2023)
Article
Optics
Bibek R. Samanta, Flavio Pardo, Todd Salamon, Rose Kopf, Michael S. Eggleston
Summary: This paper presents an electrothermally actuated MEMS mirror capable of reliable linear raster scanning with a large angular range of motion. A simple pulse design technique and segmented polysilicon microheaters are used to achieve high-speed scanning and low power consumption.
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
Environmental Sciences
Zhixin Liu, Shengqi Zhu, Jingwei Xu, Lan Lan, Xiongpeng He, Ximin Li
Summary: This paper proposes a method for cooperated range ambiguous clutter suppression in moving target detection using a phased array-frequency diverse array dual-mode radar. The method discriminates range-ambiguous clutters in the transmit spatial frequency domain and independently estimates clutter covariance matrixes for unambiguous and ambiguous regions. The enhanced clutter covariance matrix is reconstructed using a linear combination of the distinguished matrixes. The method takes advantage of the high beampattern gain of the phased array and alleviates the range ambiguous clutter suppression problem.
Article
Computer Science, Information Systems
Weiguang Shi, Wei Wang, Yang Yu, Shanshan Zhang, Yu Cao, Shuxia Yan, Junchao Gao
Summary: Effective network planning plays a crucial role in improving the performance of the RFID system. This article proposes an optimal deployment strategy for phased array reader antennas in RFID network planning, which adjusts antenna gains and radiation directions through voltage states. The introduced AFN indicator reflects frequency selective fading disturbance caused by multipath effects, while the improved chicken swarm optimization algorithm effectively tackles the RNP problem and outperforms existing approaches in simulation and experiments.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Telecommunications
Chuanzhi Wang, Xiaohua Zhu, Hong Hong
Summary: This letter investigates a decoupling model and proposes a range-angle estimation algorithm for FDA radar with uniform or non-uniform frequency offset. The effectiveness and superior performance of the algorithm are indicated through numerical simulations.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Hong-Jib Yoon, Byung-Wook Min
Summary: This paper presents a fast far-field phased array calibration/beamforming method using an improved version of the REV method. Experimentally verified, the improved method reduces the number of required measurements and enhances the accuracy and efficiency of the calibration process.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Chemistry, Multidisciplinary
Bilal Hussain, Henrique M. Salgado, Luis M. Pessoa
Summary: The paper presents a millimeter-wave antenna array design using benzocyclobutene epitaxial layers, showcasing high gain and wide scanning angle achieved through mutual matching and the introduction of metal strips for array optimization.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Hsi-Tseng Chou, Zhao-He Lin
Summary: This article presents the antenna-in-module (AiM) architecture at millimeter-wave frequencies, which has an agile polarization tunable capability, to reduce polarization mismatch to a user equipment (UE) antenna in wide-angle scans. The feasibility of AiM is validated through full-wave simulations using HFSS and measurement results of the AiM prototype.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Zhixin Liu, Shengqi Zhu, Jingwei Xu, Xiongpeng He, Qi Liu
Summary: This paper proposes a PA-FDA dual-mode radar to improve target detection performance in non-sidelooking geometry. By utilizing the range ambiguous resolvability of FDA and the high beampattern gain of PA, the proposed radar outperforms the single-mode PA or FDA radar in narrow-beam detection and wide-angle coverage. Simulation examples demonstrate the effectiveness of the proposed method.
DIGITAL SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Cun Yue Wei, Hao Chi Zhang, Pei Hang He, Le Peng Zhang, Xiao Tian Yan, Jiayuan Lu, Tie Jun Cui
Summary: We propose a dual circularly polarized (CP) substrate integrated waveguide (SIW) cavity-backed antenna with wide axial ratio (AR) beamwidth, which can generate the right-hand CP (RHCP) or left-hand CP (LHCP) radiation through exciting different ports. The antenna achieves a good performance of 3 dB AR beamwidth of 165 degrees in the desired azimuth cut plane. Furthermore, an eight-element dual CP linear phased array with a wide-angle beam scanning ability is comprised by this antenna prototype.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Physics, Applied
Son T. Le, Seulki Cho, Alexander Zaslavsky, Curt A. Richter, Arvind K. Balijepalli
Summary: This study reports on the sensitivity and noise performance of dual-gated graphene FETs. The devices exhibit high sensitivity and resolution when measuring pH, surpassing previously demonstrated sensors.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Aerospace
Yanhong Xu, Anyi Wang, Jingwei Xu
Summary: This article proposes a range-angle transceiver beamforming approach based on the semicircular-FDA scheme to handle the time-variant problem. By analyzing the periodicities of the transceiver beampattern, a NIFO semicircular-FDA with a single mainlobe peak is achieved, and the sidelobe level is further reduced through an advanced bat algorithm optimization.
IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Matthew Giorgis Anderson, Arno Thielens, Stijn Wielandt, Ali M. Niknejad, Jan M. Rabaey
Summary: This paper presents a method for low-power RF beamforming utilizing transmission-line transformers and balanced impedance phase shifters. The method offers advantages of low loss, simplicity, and scalability, and extends the beam-steering range through the introduction of a crossover switch.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Engineering, Electrical & Electronic
Xi Liang Chang, Pei Song Chee, Eng Hock Lim, Nam-Trung Nguyen
Summary: This study integrates the ionic polymer metal composite (IPMC) actuator with a radio frequency identification (RFID) tag antenna for frequency reconfiguration in the ultrahigh-frequency (UHF) band. By using the IPMC actuator, the tag resonant frequency can be effectively tuned, achieving good frequency reconfiguration and a broad tuning range for UHF RFID applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
