Results 211 to 220 of about 115,454 (254)

UWB Switched-Beam Array Antenna Employing UWB Butler Matrix

2008 International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, 2008
In this paper, we show that the design of a UWB Butler matrix can be accomplished using couplers and phase shifters in microstrip/slot technology. As a result of the proposed approach, we present the design of a 4-element switched-beam array antenna operating between 3.1 and 10.6 GHz.
Yu-Chuan Su, Marek E. Bialkowski, Feng-Chi E. Tsai, Kai-Hong Cheng   +3 more
openaire   +1 more source

Compact UWB MIMO Antenna With High Isolation Using Fence-Type Decoupling Structure

IEEE Antennas and Wireless Propagation Letters, 2019
In this letter, an ultrawideband (UWB) multiple-input–multiple-output (MIMO) antenna using a novel fence-type decoupling structure, which has high isolation in the UWB, is presented.
Lili Wang, Zhonghong Du, Hailong Yang, Ruoyan Ma, Yuchen Zhao, Xueqi Cui, Xiaoli Xi   +6 more
semanticscholar   +1 more source

Fingerprinting-assisted UWB-based localization technique for complex indoor environments

Expert systems with applications, 2020
Among the numerous radio-based solutions for indoor localization, ultra-wideband (UWB) technology is of particular interest due to its signal characteristics.
Sandra M. Djosic, Igor Z. Stojanovic, M. Jovanovic, T. Nikolic, G. Djordjevic   +4 more
semanticscholar   +1 more source

Research on Uwb Technology and Uwb Radar

Theoretical and Natural Science
Ultra-Wideband (UWB) technology signifies a significant leap forward in wireless communication techniques. This state-of-the-art method utilizes the direct modulation of impulse signals with rapid rise and fall times, achieving a signal bandwidth that can extend into several gigahertz (GHz).
openaire   +1 more source

(UWB)2: Uncoordinated, Wireless, Baseborn Medium Access for UWB Communication Networks

Mobile Networks and Applications, 2005
A MAC protocol for Ultra Wide Band (UWB) radio networks named (UWB)2 is proposed. The algorithm exploits typical features of impulse radio such as large processing gain, and is conceived in conjunction with a synchronization strategy which foresees the presence of a synchronization sequence in each transmitted packet.
DI BENEDETTO, Maria Gabriella, DE NARDIS, LUCA, Matthias Junk, Guerino Giancola   +3 more
openaire   +1 more source

UWB System for Indoor Positioning and Tracking With Arbitrary Target Orientation, Optimal Anchor Location, and Adaptive NLOS Mitigation

IEEE Transactions on Vehicular Technology, 2020
The Ultra-wideband (UWB) system for indoor positioning and tracking with the characteristics of arbitrary target orientation, optimal anchor location, and adaptive non-line-of-sight (NLOS) mitigation characteristics is proposed and implemented by ...
Yu-Yao Chen, Shih-Ping Huang, Ting-Wei Wu, Wei-Ting Tsai, Chong-Yi Liou, Shau-Gang Mao   +5 more
semanticscholar   +1 more source

Investigation and design of enhanced decoupled UWB MIMO antenna for wearable applications

Microwave and optical technology letters (Print), 2020
A lightweight multi‐input multi‐output (MIMO) two‐element wearable ultra‐wideband (UWB) antenna having a port isolation of greater than 21 dB is introduced in this communication.
A. Dey, S. Pattanayak, D. Mitra, W. Arif
semanticscholar   +1 more source

UWB antenna design

2015 2nd International Conference on Electronics and Communication Systems (ICECS), 2015
Reduced ground plane UWB antenna with rectangular patch on FR4 substrate is designed and its analysis is presented in this paper. Performance analysis was carried out for return loss, VSWR, radiation characteristics and impedance matching for the resonance frequency of 6.85 GHz.
Ogirala Venkata Saikiran, P. Eswaran
openaire   +1 more source

Development of CMOS UWB transceivers in NICT UWB consortium

2005 Asia-Pacific Microwave Conference Proceedings, 2005
This article reports our activities in a UWB research and development consortium organized by the National Institute of Information and Communications Technology, Japan. We fabricated UWB RF front-end MMICs using 180nm CMOS technology for both of the multiband system and the impulse radio system.
A. Kasamatsu, K. Li, T. Matsui
openaire   +1 more source

Multiband UWB transceivers

Proceedings of the IEEE 2005 Custom Integrated Circuits Conference, 2005., 2006
This paper presents the design of UWB transceivers from both system-level and circuit-level perspectives. Following a detailed analysis of the impact of RF imperfections on the performance of the system, we review a number of transceiver and synthesizer architectures that can satisfy the MBOA UWB standard requirements.
B. Razavi, null Han-Chang Kang, null Cheng-Chung Hsu, null Chao-Cheng Lee   +3 more
openaire   +1 more source