Results 71 to 80 of about 549,184 (227)

Time and phase alignment of distributed gateways: Theoretical analysis and experimental demonstration

International Journal of Satellite Communications and Networking, Volume 44, Issue 1, Page 47-59, January/February 2026.
The performance limitation in multiple‐input multiple‐output (MIMO) feeder links due to time and phase misalignment of the ground stations is investigated. Time and phase distribution over optical fiber is considered as an approach to achieve the synchronization requirements.
Eriserdi Mollaymeri, Thomas Delamotte, Andreas Knopp   +2 more
wiley   +1 more source

UHF RFID antenna impedance matching techniques

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017
The modified T-match network uses planar inductive strips for conjugate matching Radio Frequency Identification (RFID) Integrated Circuits (RFICs). Narrow and broadband matching techniques and electromagnetic simulations are applied in [1] for specific designs.
Sockolov, Kamron, Arakaki, Dean
openaire   +2 more sources

Spectral Characteristics and Evolution Mechanism of Silicon Rubber Surface Discharge Under Thermal Ageing Condition

High Voltage, Volume 11, Issue 1, Page 192-200, February 2026.
ABSTRACT Surface discharge is a typical fault type in electric power equipment. High temperature in long‐term operation can easily lead to ageing of materials, resulting in changes in surface characteristics and surface discharge faults. In this paper, a method of surface discharge identification of silicon rubber (SiR) based on spectral detection ...
Yanze Han, Liankang Zhang, Beibei Sun, Lu Liu, Guochang Li, Shengtao Li, Yanhui Wei   +6 more
wiley   +1 more source

Novel UHF RFID Near-Field Reader Antenna with Uniform Vertical Electric Field Distribution

International Journal of Antennas and Propagation, 2020
This paper presents two novel UHF RFID near-field reader antennas with uniform vertical electric field distribution. The two antennas have the following common characteristics.
Yanbin Chen, Xiaojuan Ren, Jimin Zhao, Xin Chen, Yuan Yao, Junsheng Yu, Xiaodong Chen   +6 more
doaj   +1 more source

Fabrication and Characterization of Flexible Spray-Coated Antennas

IEEE Access, 2018
This paper investigates the potential of using spray coating as a methodology for flexible antenna fabrication. The methodology has advantages compared with other antenna-printing techniques, such as screen-printing and gravure printing (more flexibility
Arno Thielens, Igal Deckman, Reza Aminzadeh, Ana C. Arias, Jan M. Rabaey   +4 more
doaj   +1 more source

Series Arrangement Technique for Highly-Directive PCB Leaky-Wave Antennas With Application to RFID UHF Frequency Scanning Systems

IEEE Open Journal of Antennas and Propagation
The efficient series connection of planar leaky-wave antennas (LWA) to obtain directive frequency beam scanning, is proposed in this paper. Conditions for the proper performance are here derived, showing that the distance between antennas must be ...
Miguel Poveda-Garcia, Alejandro Gil-Martinez, Astrid Algaba-Brazalez, David Canete-Rebenaque, Jose Luis Gomez-Tornero   +4 more
doaj   +1 more source

Design and Development of a New Electrically Small 3D UHF Spherical Antenna with 360° of Opening Angle in the Whole Space for RFID, WSN, and RSN Applications

International Journal of Antennas and Propagation, 2016
Several antenna designs have been made in order to obtain a novel electrically small 3D UHF spherical antenna (ka = 0.1916), which has a resonance frequency close to 915 MHz, produces a quasi-isotropic radiation with an opening angle equal to 360° in the
Abdelhamid Bou-El-Harmel, Ali Benbassou, Jamal Belkadid   +2 more
doaj   +1 more source

Wide-Band UHF Television Receiving Antennas

The Journal of the Institute of Television Engineers of Japan, 1969
これまでUHFテレビ受信用アンテナ (662-770MHz) として広く用いられている八木アンテナ, コーナレフレクタアンテナなどをさらに広帯域化 (470-770MHz) するために, その要となるまったく新しい放射器を開発した. この放射器は構造が簡単で, 理論的にもすぐれたインピーダンスを示しているが, さらに, この放射器を支持する絶縁材料の影響を有効に利用することにより, より広帯域なインピーダンスを示すように工夫した実用的な放射器である. この理論解析と実験結果を述べ, これを用いたUHFテレビ受信用広帯域アンテナの諸特性についても述べる.
Atsushi Oyama, Hiroshi Oyama, Noriyuki Kawamoto   +2 more
openaire   +2 more sources

Analysis of Silver Ink Bow-Tie RFID Tag Antennas Printed on Paper Substrates

International Journal of Antennas and Propagation, 2007
In this study, polymeric silver inks, paper substrates, and screen printing were used to produce prototype Bow-Tie tags. Because of increasing interest in applying passive UHF-RFID systems in paper industry, the Bow-Tie antenna used in this study was ...
Sari Merilampi, Leena Ukkonen, Lauri Sydänheimo, Pekka Ruuskanen, Markku Kivikoski   +4 more
doaj   +1 more source

Dual-Band Dual-LP/CP Antennas Using Combined Metasurface and Patch For UHF/2.45-GHz RFID Readers

IEEE Access
This paper proposes dual-band dual linearly-polarized (LP)/circularly-polarized (CP) antennas using combined metasurface and patch for ultra high frequency (UHF) and 2.45-GHz RF identification (RFID) readers.
Thi Ngoc Hien Doan, Khac Kiem Nguyen, Son Xuat Ta   +2 more
doaj   +1 more source