Irregular Polyomino-Shaped Subarrays for Space-Based Active Arrays by R. J. Mailloux, S. G. Santarelli, T. M. Roberts, D. Luu

“…It is shown that using irregular polyomino subarrays can result in a major decrease in sidelobes while presenting, in most cases, only a few tenths of a dB gain reduction compared to rectangular subarrays.…”
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A Low-Profile Dual-Polarized High-Gain Low Cross-Polarization Phased Array for Ku-Band Satellite Communications by Yuhan Huang, Jie Zhang, Xiuping Li, Zihang Qi, Fan Lu, Hua Jiang, Xin Xue, Hua Zhu, Xiaobin Guo

“…The measured impedance bandwidths of the proposed phased array antennas are around 21.1%, while the in-band isolations are above 36.7 dB. Gains up to 29 dBi and 32.4 dBi are performed by two prototypes separately. …”
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Hybrid precoding based on distributed partially-connected structure for multiuser massive MIMO by Lei ZHANG, Qin WANG

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Investigation of a Radiation Pattern Frequency Dependence of a Subarrayed Slotted Waveguide Antenna Using CAD Ansys HFSS by V. G. Koshkid’ko, M. M. Migalin

“…In this regard, the distortion of the radiation pattern is becoming an urgent task.Aim. The main objective of this work is to preserve the radiation pattern of the resonant slotted waveguide antenna with longitudinal slots in the broad face in operating bandwidth.Materials and methods. …”
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Simultaneous Multibeam Clustered Phased Arrays Analysis Using Mixed and Multiple Antenna Element Factors by Francesco Alessio Dicandia, Simone Genovesi

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A High-Gain Series-Parallel Millimeter-Wave SIW Cavity-Backed Patch Array by Wenlei Wang, Huayan Jin, Lekai Zhou, Kuo-Sheng Chin, Guo Qing Luo

“…The fabricated array prototype realized a −10 dB impedance bandwidth of 14.7% in the 24–27.8 GHz frequency band, with a peak gain of 22.05 dBi. Overall, based on its advantages—wide band, high gain, low cost, and compact feeding network—the proposed array can be considered a potential candidate for use in mmW wireless applications.…”
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Deep-Learning-Based High-Precision Localization With Massive MIMO by Guoda Tian, Ilayda Yaman, Michiel Sandra, Xuesong Cai, Liang Liu, Fredrik Tufvesson

“…In this way, ensemble learning can be utilized to fuse all chains to improve localization performance. …”
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A Flexible Phased-MIMO Array Antenna with Transmit Beamforming by Wen-Qin Wang, Huaizong Shao

“…That is, a small frequency increment is employed in each subarray. Each subarray forms a directional beam and all beams may be steered to different directions. …”
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Antenna Array Based on Fabry–Perot Cavity with Mechanoelectrical Beam Steering by Y. A. Litinskaya, S. V. Polenga, Y. P. Salomatov

“…This article investigates the directional characteristics of a subarray based on a Fabry–Perot cavity and an antenna array with mechanoelectrical beam steering.Aim. …”
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Instantaneous Bandwidth Enhancement for Variable Inclination Continuous Transverse Stub Antenna by Zheng Liu, Jian Zhang, Xue Lei, Tianpeng Li, Jun Gao, Zhijian Xu

“…To demonstrate this method, a proposed VICTS antenna composed of 2 × 2 subarrays was designed and simulated. Compared with the traditional VICTS antenna of the same aperture size, the gain loss was reduced by at least 52% and the 3/4-dB gain-loss bandwidth increased from 2.5% to 4.2%. …”
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A Tutorial on Wideband XL-MIMO: Challenges, Opportunities, and Future Trends by Mohammad Parvini, Bitan Banerjee, Muhammad Qurratulain Khan, Torge Mewes, Ahmad Nimr, Gerhard Fettweis

“…Motivated by the challenges of maintaining consistent beamforming across frequency, we categorize existing solutions into two main classes: subband division-based methods, which are based on filtering the wideband signal to narrowband signals and applying a subband-dependent set of phase shifts to each subband to reduce the beam squint, and subarray division-based techniques, which involve partitioning the entire array into smaller subarrays or utilizing a subarray of true-time-delays (TTDs). …”
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Design of an S-Band Phased Array with Modified Dipoles by Meng Xiang, Yu Xiao, Bin Xi, Yue Zhang, Shiyou Xu

“…The measured scanning loss in the H-plane is 2.7 dB when scanning up to 60° with active voltage standing wave ratio (VSWR) <3, and the gain can achieve 21 dB at 3 GHz with a cross-polarization level below −30 dB at all angles.…”
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High isolation 16-port massive MIMO antenna based negative index metamaterial for 5G mm-wave applications by Alya Ali Musaed, Samir Salem Al-Bawri, Wazie M. Abdulkawi, Khaled Aljaloud, Zubaida Yusoff, Mohammad Tariqul Islam

“…Abstract A 16-port massive Multiple-Input-Multiple-Output (mMIMO) antenna system featuring a high gain and efficiency is proposed for millimeter-wave applications. …”
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Application of Aperiodic &#x201C;Einstein&#x201D; Monotile in Phased Arrays With Limited Beam Scanning Range by Yunfei Qiang, Xiaochuan Fang, Rui-Xin Wu, Qian Chen, Wei Wang

“…Example B features a subarray comprising eight antenna elements based on the Hat polykite. …”
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A 60-GHz Wideband High-Efficiency Circularly Polarized Dual-Coil Antenna Array by Jun Xiao, Qi Gan, Zihang Ye, Chong-Zhi Han, Tongyu Ding, Qiubo Ye

“…The proposed CP dual-coil antenna is composed of a resonant substrate-integrated cavity (SIC) and a pair of centrally symmetrical coils, which are fed differentially by a substrate-integrated waveguide (SIW) coupling slot. …”
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Dual-band reconfigurable circularly polarized antenna with novel phase shifter and beamforming network by Majid Allahverdizadeh, Reza Masoumi, Mohammad Bemani

“…The proposed antenna exhibits high performance in terms of gain and polarization purity across two distinct frequency bands: 2.4 GHz and 5.2 GHz. …”
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Reconfigurable mmWave Planar Phased Array Featuring Wide Elevation and Full Azimuth Spatial Coverage for 5G Vehicular Application by Saiful Islam, Hanvit Kim, Tuyen Dinh Nguyen, Sunwoo Kim, Hyoungsuk Yoo

“…Furthermore, the subarray achieves beam scanning at angles of &#x00B1;32&#x00B0; while maintaining a gain exceeding 8 dBi. …”
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Single-cell bilayer design of a terahertz six-channel metasurface for simultaneous holographic and grayscale images by Zhiqiang Du, Chunhui Zhu, Zhengyong Song

“…Abstract Metasurfaces have exhibited excellent capabilities in controlling main characteristics of electromagnetic fields. Thus, a lot of significant achievements have been attained in many areas especially in the fields of hologram and near-field imaging. …”
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Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS by Eduardo Carrasco, Mariano Barba, Manuel Arrebola, Jose A. Encinar

“…In all the cases, the effects of the MEMS switches and their assembly circuitry are evaluated when they are used in a 2-bit phase shifter which can be extended to more bits, demonstrating that the proposed elements can be used efficiently in reconfigurable-beam reflectarrays.…”
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A Ku-Band Foldable Reflectarray Based on a Maltese-Cross Microstrip Element by S. V. Polenga, R. O. Ryazantsev, A. D. Poligina, R. M. Krylov, E. A. Litinskaya, Yu. P. Salomatov

“…The reflector consists of four subarrays, which provide its compact folding for transportation. …”
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