Results 81 to 90 of about 25,027 (314)

Towards a hardware implementation of ultra-wideband beamforming [PDF]

, 2010
This paper discusses and analyses the hardware implementation of an ultra-wideband (UWB) beamformer for UWB Impulse Radio data transmission. We use a Complex Programmable Logic Device (CPLD) acting as the binary baseband information source.
Wolfgang Gartner, Mark E. Beach, Geoff Hilton, Philipp K. Gentner, Christoph F. Mecklenbrauker, Gartner, W, Beach, MA, Mecklenbräuker, CF, Gentner, PK, Hilton, GS   +9 more
core   +1 more source

Antenna Arrays

, 2022
This book provides a comprehensive overview of antenna arrays and their applications in wireless communication systems. It presents modern studies of reconfigurable antenna arrays, radar antenna arrays, radiation pattern analysis, and optimization and ...

core   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

System Concept of a Compact Multi-Antenna GNSS Receiver

, 2012
This paper presents the conceptual design of a compact 2x2 array receiver for GNSS applications. Besides mere miniaturization, the goal of this work is also investigation on novel techniques for coping with the strong mutual coupling imposed in ...
Hein, Matthias, Kappen, Götz Caspar, Irteza, Safwat, Stephan, Ralf, Hein, M. A., Antreich, Felix, Khan, M. A., Sgammini, Matteo, Kappen, Götz, Kurz, Lothar, Basta, Nikola, Caizzone, Stefano, Dreher, A., Noll, Tobias G., Irteza, S., Richter, Andre, Dreher, Achim, Schäfer, Eric, Stephan, R., Schafer, E., Khan, Muhammad A., Richter, A.   +21 more
core  

Low-complexity smart antenna methods for third-generation W-CDMA systems

, 2000
There is still an open debate within the research community regarding the likely performance enhancement of smart antennas versus their complexity for commercial wireless applications.
Athanasiadou, GE, Piechocki, RJ, Tsoulos, G   +2 more
core   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

Advanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee, Yun‐Tae Kim, Hwarang Choi, Sanghwan Park, Seongyeop Lim, Chang Young Lee   +5 more
wiley   +1 more source

Synthesis of sparse rectangular planar arrays with weight function and improved grey wolf optimization algorithm

IET Microwaves, Antennas & Propagation
The present article proposes a novel hybrid approach for addressing the synthesis problem of rectangular planar arrays under multiple constraints, through joint optimization of the weight function and the improved grey wolf optimization (IGWO) algorithm.
Kui Tao, Bin Wang, Xue Tian, Qi Tang, Guihan Xie   +4 more
doaj   +1 more source

Analyzing the trade-offs: non-identical antenna array elements in wireless communication systems

Cogent Engineering
In wireless communication systems, the design and optimization of antenna arrays play a crucial role in achieving desired performance metrics. Many constraints on optimizing antenna arrays to achieve minimum SLL, high Gain, and good impedance matching ...
Twahir Kazema, Bonny Mgawe
doaj   +1 more source