Results 51 to 60 of about 1,969 (224)

Fractal-Enhanced Microstrip Antennas: Miniaturization, Multiband Performance and Cross-Polarization Minimization for Wi-Fi Applications

Engineering Proceedings, 2023
Due to the fast advancement of technology and industry, miniaturization has become an important research area. Also, all wired systems are shifting into wireless, and thus, there is a need for antennas to transmit and receive data in and out of gadgets ...
Sanish Vaipel Sanu, Stephen Rodrigues, Jisha Krishnan Nair Vallikkunnel, Sajitha Anpamattathil Sivan   +3 more
doaj   +1 more source

A Sub‐Microsecond Switch Enabling SWIFT 23Na Imaging at 10.5 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To enable sodium SWIFT imaging, which is a zero‐echo time imaging technique, at ultra‐high magnetic fields through the development of custom electronics hardware, and to showcase this capability with in vivo imaging results. Methods The custom hardware developed consists of a high‐speed optical trigger with 10 ns resolution, an in‐bore
Russell L. Lagore, Simon Schmidt, Edward J. Auerbach, Naoharu Kobayashi, Christoph Schildknecht, Steen Moeller, Elnaz Mahmoudi Mahmoudalilou, Štefan Zbýň, Jutta Ellermann, Gregor Adriany, Gregory J. Metzger   +10 more
wiley   +1 more source

Identification of initial vegetation and habitat changes in small temperate fens using remote sensing

Remote Sensing in Ecology and Conservation, EarlyView.
Temperate fens with only incipient, subtle signs of deterioration can be reliably identified using Sentinel‐2 and aerial imagery, which sensitively detect early productivity‐related structural changes. Abstract Small temperate fens rank among the most endangered habitats in temperate Europe.
Lubomír Tichý, Patricia Singh, Petra Hájková, Anna Müllerová, Tomáš Peterka, Zuzana Plesková, Karel Prach, Adéla Široká, Kamila Vítovcová, Michal Hájek   +9 more
wiley   +1 more source

Multimode and Multiband Microstrip Antennas [PDF]

, 2007
This thesis describes original work on the broadband and multiband matching of microstrip patch antennas. Microstrip patch antennas suffer from many constraints on their performance. One major restriction is their narrow impedance bandwidth.
Abunjaileh, Alaa Ibrahim
core  

Quad-Band Printed Antenna for Portable WLAN Applications

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a novel printed monopole antenna for quad-band operation in four WLAN bands: ISM 2.4 GHz, 5.2 GHz, 5.6 GHz, and ISM 5.8 GHz. This antenna is compact, thin, lightweight, easy to manufacture, and suitable for portable devices.
Murilo H. Seko, Fatima S. Correra
doaj   +1 more source

Multiband Planar Monopole Antenna for LTE MIMO Systems

International Journal of Antennas and Propagation, 2012
A novel multiband-printed planar monopole antenna for LTE multi-input and multi-output (MIMO) application is proposed. A meandering microstrip line-loaded monopole antenna with multiband characteristic is presented.
Yuan Yao, Xing Wang, Junsheng Yu
doaj   +1 more source

Miniaturized Multiband Metamaterial Antennas With Dual-Band Isolation Enhancement

IEEE Access, 2022
We present electrically small, multi-band, metamaterial-inspired antennas with adequate radiation characteristics and isolation enhancement. The antenna element consists of a complementary split-ring resonator (CSRR) embedded in a small monopole that has
Christos Milias, Rasmus B. Andersen, Pavlos I. Lazaridis, Zaharias D. Zaharis, Bilal Muhammad, Jes T. B. Kristensen, Albena Mihovska, Dan D. S. Hermansen   +7 more
doaj   +1 more source

Antenna Booster Element for Multiband Operation

Sensors
The escalating demand for versatile wireless devices has fostered the need to reduce the antenna footprint to support the integration of multiple new functionalities. This poses a significant challenge for the Internet of things (IoT) antenna designers tasked with creating antennas capable of supporting multiband operation within physical constraints ...
Elena García, Aurora Andújar, Jaume Anguera   +2 more
openaire   +4 more sources

Modelling the Four‐Dimensional Power Line Sag Dynamics by Point Signature in Time‐Series Synthetic‐Aperture Radar Images

High Voltage, EarlyView.
ABSTRACT Power lines in synthetic‐aperture radar (SAR) images are reflected as point signatures, which fluctuate annually in both the azimuth and range directions. A novel framework is proposed in this paper to evaluate the four‐dimensional dynamic status of power line sag using those point signatures in time‐series SAR images.
Sijie Ma, Tao Li, Mahdi Motagh, Yan Liu, Yangmao Wen   +4 more
wiley   +1 more source

Multiband hybrid loop-notch antennas

Loughborough Antennas & Propagation Conference (LAPC 2017), 2017
The study describes a small antenna with a hybrid loop‐notch configuration. This format has very small dimensions in terms of the operating wavelength and operation is possible over two or more non‐contiguous frequency bands. When integrated into a host circuit board it can be designed to maintain a substantially constant resonant frequency in the ...
openaire   +1 more source