Zobrazeno 1 - 10
of 266
pro vyhledávání: '"Multi-Beam antenna"'
Publikováno v:
Radioengineering, Vol 33, Iss 1, Pp 136-144 (2024)
Among the existing circularly polarized multi-beam transmitarray antennas, circularly or linearly-to-circularly polarized transmitarray units are always required. Naturally, designing circularly polarized units is more challenging than linear polariz
Externí odkaz:
https://doaj.org/article/97ac9665926647318bf8267f30261bf4
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 392-407 (2023)
A novel synthesis method for holographic multi-feed antennas is presented to combine all sub-holograms into an angle-dependent shared holographic aperture. In order to find the global error minimum between the shared holographic aperture and all idea
Externí odkaz:
https://doaj.org/article/d5995135ffdc48b2b2b8802e12039a9c
Publikováno v:
天地一体化信息网络, Vol 3, Pp 22-30 (2022)
Because of the difference between satellite-ground link and ground propagation loss characteristics, the spectrum effi ciency index of satellite communication system is far lower than that of terrestrial cellular system in the same period.It is of ut
Externí odkaz:
https://doaj.org/article/bea80ec0a0554fffbbcf321e4f4f045b
Publikováno v:
天地一体化信息网络, Vol 3, Pp 12-19 (2022)
Spaceborne multi-beam antenna is one of the main means to meet the needs of high-capacity and high-speed satellite communication services, and is widely used in various satellite communication systems.Various forms of antennas, such as spaceborne pha
Externí odkaz:
https://doaj.org/article/b0de3cdc335a48dba21dca73c8f72817
Autor:
Abdelhamid M. H. Nasr, Kamal Sarabandi
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 1313-1323 (2022)
Design procedure and experimental validation for a millimeter-wave (MMW) vehicular antenna with simultaneous multi-beam, for 5G V2X application, is presented. The design overcomes the constraint for requiring both wide angular coverage and high gain
Externí odkaz:
https://doaj.org/article/f7bce493cfe54a73986935badad92875
Autor:
Satyanand Singh
Publikováno v:
Emerging Science Journal, Vol 4, Iss 0, Pp 70-84 (2021)
Minimum Redundancy Linear Arrays (MRLAs) and Uniform Linear Arrays (ULAs) investigation conducted with the possibility of using them in future 5G smart devices. MRLAs are designed to minimize the number of sensor pairs with the same spatially correla
Externí odkaz:
https://doaj.org/article/d0d87a8d12334ddfa893611838852ac5
A bi-dimensional compressed Luneburg lens antenna for miniaturization based on transformation optics
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
Transformed Luneburg lens has been widely employed to provide aberration-free imaging and high-gain antenna system, but whose focal plane and beam scanning range decrease correspondingly. In this paper, a two-dimensional compressed elliptical cylindr
Externí odkaz:
https://doaj.org/article/5d98598ad18148098345c57b83bd3d36
Publikováno v:
Applied Sciences, Vol 13, Iss 12, p 7229 (2023)
In this paper, a compact direction-finding system based on a deep neural network (DNN) with a single-patch multi-beam antenna is proposed. To achieve multiple beams, the patch is divided into four sectors by metal vias, and the pattern is tilted in t
Externí odkaz:
https://doaj.org/article/87d8c80b8eb2455280d04a622eb167e7
Autor:
Jan M. Kelner, Cezary Ziółkowski
Publikováno v:
International Journal of Electronics and Telecommunications, Vol vol. 66, Iss No 1, Pp 17-23 (2020)
Massive multiple-input-multiple-output (MIMO) and beamforming are key technologies, which significantly influence on increasing effectiveness of emerging fifth-generation (5G) wireless communication systems, especially mobile-cellular networks. In th
Externí odkaz:
https://doaj.org/article/a7d682b392804bdd80ac895cf9ac15e6
Millimeter-Wave Butler Matrix Beamforming Circuit Using Finline in Double-Layer Dielectric Substrate
Autor:
Nguyen Thanh Tuan, Kunio Sakakibara, Kojiro Iwasa, Takeshi Okunaga, Nobuyoshi Kikuma, Yoshiki Sugimoto
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 1, Pp 579-589 (2020)
This article presents a new kind of finline in double-layer dielectric substrate and its beamforming circuit of Butler matrix in the millimeter-wave band. The finline is constructed by inserting a slotline between two dielectric substrate layers. In
Externí odkaz:
https://doaj.org/article/971ae0f954724434b8e3c2bb55de78fa