Results 221 to 230 of about 47,269 (283)

Multibeam Hybrid Transmitarray Based on Polarization Rotating Metasurface With Reconfigurable Bidirectional Radiation

IEEE Transactions on Antennas and Propagation
This article proposes a bidirectional multibeam hybrid transmitarray (HTA) using a transmission polarization-rotating metasurface (TPRM). A novel configuration is introduced to facilitate bidirectional beam-scanning by combining the transmitarray (TA ...
Fan Qin, Yifei Liu, Chao Gu, Linfeng Zeng, Wenchi Cheng, Hailin Zhang, S. Gao   +6 more
semanticscholar   +1 more source

A Double-Fold 7×8 Butler Matrix-Fed Multibeam Antenna With a Boresight Beam for 5G Applications

IEEE Antennas and Wireless Propagation Letters, 2022
A substrate integrated waveguide multibeam antenna fed by a double-fold 7×8 Butler matrix (BM) beam-forming network (BFN) is presented. The proposed antenna is composed of a 7×8 BM feeding network and an 8×8 slot array.
Ming-Hsi Wu, Bing Zhang, Yanping Zhou, Kama Huang   +3 more
semanticscholar   +1 more source

IMPos: Indoor Mobile Positioning With 5G Multibeam Signals From a Single Base Station

IEEE Internet of Things Journal
With the widespread deployment of the fifth-generation (5G) network indoors, commercial 5G signals are highly attractive in the field of indoor positioning because of their ubiquity.
Xin Zhou, Liang Chen, Yanlin Ruan, Tao Zhou, Ruizhi Chen   +4 more
semanticscholar   +1 more source

Design of 2-Bit Single Linearly Polarized Reconfigurable Intelligent Surface for Single-Beam/Multibeam Scanning

IEEE Antennas and Wireless Propagation Letters
Single-beam/multibeam scanning is a key technology in modern wireless communications, where extensive works have been devoted to improving the performance of devices, such as the coverage capability.
Yongji Chen, Jian Ren, Puchu Li, Xuenan Ren, Jiangang Wang, Shunde Zhang, Ying-Zheng Yin   +6 more
semanticscholar   +1 more source

A Compact Multibeam Folded Transmitarray Antenna at Ku-Band

IEEE Antennas and Wireless Propagation Letters, 2021
Multibeam antennas have found more and more applications in current and future communication systems. In this letter, a low-profile multibeam fully planar folded transmitarray antenna (FTA) based on the bifocal principle is proposed.
Guowei Li, Y. Ge, Z. Chen
semanticscholar   +1 more source

Multibeam coupling in photorefractive SBN:Ce

Optics Letters, 1988
Theoretical and experimental results are presented for simultaneous multibeam coupling in photorefractive SBN:Ce. Within a single crystal, multiple signals are amplified through a coupling process that employs a single pump. The coupling gain of each signal results from coupling both between the pump and the signal and between different signals.
J, Ma, L, Liu, S, Wu, Z, Wang, L, Xu, B, Shu   +5 more
openaire   +2 more sources

Indoor Positioning With Multibeam CSI From a Single 5G Base Station

IEEE Sensors Letters
Fifth-generation (5G) networks have been deployed to serve a massive number of users. The new properties of 5G, such as large bandwidth, high data rates, and extensive coverage, provide promising possibilities for positioning and navigation.
Xin Zhou, Liang Chen, Yanlin Ruan
semanticscholar   +1 more source

Scheduling in Multibeam Satellites with Interfering Zones

IEEE Transactions on Communications, 1983
In this paper we study the traffic scheduling problem in an SS/TDMA system with interfering beams. We investigate a twostep approach, the first step being the assignment of orthogonal polarization to reduce the interference, and the second step being the scheduling of traffic, taking into account the "resultant" interference. The first step we show can
GOPAL IS, BONUCCELLI, MAURIZIO ANGELO, WONG CK   +2 more
openaire   +2 more sources

Compact Broadband Substrate-Integrated Coaxial Line 2-D Beamforming Network and Its Multibeam Array Antenna Applications

IEEE transactions on microwave theory and techniques
This article presents a compact broadband 16-way two-dimensional (2-D) Butler matrix (BM)-based beamforming network (BFN) using multilayer substrate-integrated coaxial line (SICL).
W. Li, Jun Xu, Renrong Zhao, W. Hong
semanticscholar   +1 more source

2-D Orthogonal Multibeam Antenna Arrays for 5G Millimeter-Wave Applications

IEEE transactions on microwave theory and techniques, 2022
In this article, a 2-D $16 \times 16$ Butler matrix-based passive multibeam antenna array (MBAA) and a 2-D active–passive hybrid MBAA (APHMBAA) are both presented for fifth-generation (5G) millimeter-wave (mmWave) applications, which demonstrate that a 2-
Wei-Bing Kong, Yun Hu, Jiawang Li, Lei Zhang, Wei Hong   +4 more
semanticscholar   +1 more source