Results 31 to 40 of about 152,416 (209)

Multibeam Beamforming Technology in Microwave Power Transfer and Harvesting

IEEE Journal of Microwaves
The rise in popularity of the Internet of Things (IoT) has increased the need to power devices wirelessly, a process called Wireless Power Transfer (WPT), to avoid the usage of batteries, which present limited lifespans.
Fabio Silva, Pedro Pinho, Nuno Borges Carvalho   +2 more
doaj   +1 more source

Best Feed Positions and Radiation Patterns of Typical Multibeam Dielectric Lens Antenna

IEEE Access
Multibeam base station antennas are introduced for 5G and 6G mobile communication systems. Considering higher frequency bands such as millimeter waves for 5G and terahertz for 6G, dielectric lens antennas become promising candidates due to their simple ...
M. Muhsin, Kamilia Kamardin, Yoshihide Yamada, Yoshiki Sugimoto, Kunio Sakakibara   +4 more
doaj   +1 more source

CP metasurfaced antennas excited by LP sources [PDF]

, 2012
A metasurface which is considered as a polarizer for microwave antennas is proposed in this paper. Preliminary results have shown that circularly polarized (CP) radiation can be obtained from linearly polarized (LP) source antennas with the use of ...
T. I. Yuk, Zhu, Hailiang, S. W. Cheung, Cheung, SW, Cheung, S. W., Zhu, H, Chung, Kwok L. (R17316), Chung, KL, Hailiang Zhu, Yuk, TI, X. L. Sun, Kwok L. Chung, Yuk, Tong I., Sun, X, Sun, X. L.   +14 more
core   +1 more source

Radiation characteristics of corner reflector antennas. [PDF]

, 1998
PhDThis thesis presents a study of the radiation characteristics of corner reflector antennas. The influence of the design parameters on the radiation characteristics are assessed using an analytical method and the Finite Difference Time Domain (FDTD)
Sterr, U.
core   +4 more sources

Challenges in the Multibeam Antennas

, 2018
In this project, we are trying to shed light on various aspects of the antenna arrays. Special focus is on solving the problems related to multibeam antennas. One traditional application of the multibeam antennas is sum and difference patterns.
Morteza Shahpari
core   +2 more sources

In Situ Two‐Dimensional Residual Stress Characterization of Thin Films

Advanced Materials Technologies, EarlyView.
An integrated in situ curvature metrology platform combining speckle‐based curvature optical metrology (SCOM) with multi‐beam optical sensors (MOS) enables spatially resolved two‐dimensional curvature mapping of thick sputtered coatings. The SCOM technique provides excellent agreement with MOS while providing an extended measurable curvature range ...
Wai Jue Tan, Wadwan Singhapong, Arindam Majhi, Chris Bowen, Alexander J.G. Lunt, Hongchang Wang, Kawal Sawhney   +6 more
wiley   +1 more source

Scanning Parametric Sediment Echosounder as Tool for Underwater Archaeological Prospection

Archaeological Prospection, EarlyView.
ABSTRACT Underwater cultural heritage 3D prospection techniques, especially for remains that are partly buried in the ground, are only very rarely available and often can only be applied with considerable technical effort. To overcome this limitation, we evaluate a methodological adaption of widely used and available single channel parametric sediment ...
Dennis Wilken, Philipp Held, Jacob Geersen, Marcel Bradtmöller, Peter Feldens, Jens Schneider v. Deimling   +5 more
wiley   +1 more source

3x3 Multibeam Network for a Triangular Array of Three Radiating Elements [PDF]

, 2011
A multibeam antenna study based on Butler network will be undertaken in this document. These antenna designs combines phase shift systems with multibeam networks to optimize multiple channel systems.
Novo Garcia, A., Garcia-Gasco Trujillo, Javier, Vera Isasa, M., Sierra Pérez, Manuel   +3 more
core  

The performance enhancement of multibeam adaptive base-station antennas for cellular land mobile radio systems [PDF]

, 1990
The problem of meeting the proliferating demands for mobile telephony within the confinement of the limited radio spectrum allocated to these services is addressed.
MCGEEHAN, J, Mark A. Beach, David J Edwards, Swales, SC, Edwards, DJ, Simon C. Swales, Joseph P. Mcgeehan, McGeehan, JP, SWALES, S, Beach, MA, BEACH, M, EDWARDS, D   +11 more
core   +1 more source

A Beam Search-Based Channel Allocation Method for Interference Mitigation of NGSO Satellites with Multi-Beam Antennas

Aerospace, 2022
In the past few years, non-geostationary orbit (NGSO) satellite communication constellations have regained popularity due to their conspicuous advantages.
Haojie Zhang, Di Ren, Fanghua Jiang
doaj   +1 more source