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. …”
Get full text

Simultaneous Multibeam Clustered Phased Arrays Analysis Using Mixed and Multiple Antenna Element Factors by Francesco Alessio Dicandia, Simone Genovesi

Get full text

Antenna Array Based on Fabry–Perot Cavity with Mechanoelectrical Beam Steering by Y. A. Litinskaya, S. V. Polenga, Y. P. Salomatov

“…Low-profile effective antenna systems (AS) with maintained directional characteristics in a wide sector of scanning angles are required for satellite communication at mobile objects. …”
Get full text

A Non-PCM-Based 2 × 2 MIMO Antenna Array With Low Radar Cross-Section Using Characteristic Mode Analysis by Manzoor Elahi, Slawomir Koziel, Leifur Leifsson

“…The results indicate that the MIMO antenna maintains good isolation, ranging from 22 to 50 dB among ports within the operating band from 9.6 to 10.7 GHz, and exhibits RCS reduction under different polarization ranging from 9 to 19 dB across the band from 8.5 to 12 GHz. …”
Get full text

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). …”
Get full text

Application of Aperiodic “Einstein” Monotile in Phased Arrays With Limited Beam Scanning Range by Yunfei Qiang, Xiaochuan Fang, Rui-Xin Wu, Qian Chen, Wei Wang

“…This configuration achieves 90% aperture efficiency while keeping the maximum grating lobe level below −14 dB within an ±18° main beam scanning range.…”
Get full text

Deep-Learning-Based High-Precision Localization With Massive MIMO by Guoda Tian, Ilayda Yaman, Michiel Sandra, Xuesong Cai, Liang Liu, Fredrik Tufvesson

“…In our case, such an approach eases the training process while maintaining or even enhancing the performance. We also use the Nyquist sampling theorem to gain insight on how to appropriately sample and average training data. …”
Get full text

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

“…Utilizing PIN diode-controlled strips, the antenna enables vertical beam tilting up to ±40° on a car with less than 1 dB gain variation. Furthermore, the subarray achieves beam scanning at angles of ±32° while maintaining a gain exceeding 8 dBi. …”
Get full text

Ultra-Wideband Frequency-Invariant Beamforming Using a Generalized Nesting Array by Taeho Yu, Jin Myeong Heo, Cheolsun Park, Yong Ku Jeon, Gangil Byun

“…Due to this integer multiple relationships, the array elements of the subarrays are superimposed so that the total number of array elements is reduced while maintaining FIB performance over the target frequency band. …”
Get full text

Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS by Eduardo Carrasco, Mariano Barba, Manuel Arrebola, Jose A. Encinar

“…The latter are proposed as a low cost solution for reducing the number of electronic control devices as well as the manufacturing complexity of large reflectarrays. The main advantages and drawbacks of the grouping are evaluated in both pencil and shaped-beam antennas. …”
Get full text

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. …”
Get full text