Results 21 to 30 of about 7,053 (265)

Microstrip Folded Dipole Antenna for 35 GHz MMW Communication

International Journal of Antennas and Propagation, 2013
A microstrip asymmetric folded dipole antenna on chip is proposed in this paper. The construction of balun feed line is adopted to provide wideband.
Guang Hua, Chen Yang, Ping Lu, Hou-Xing Zhou, Wei Hong   +4 more
doaj   +1 more source

Numerical Study of the Near-Field and Far-Field Properties of Active Open Cylindrical Coated Nanoparticle Antennas

IEEE Photonics Journal, 2011
A very electrically small, active open cylindrical coated nanoparticle model is constructed, and its electromagnetic properties are investigated in the visible frequency band.
Junping Geng, Richard W. Ziolkowski, Ronghong Jin, Xianling Liang   +3 more
doaj   +1 more source

Effects of Split Position on the Performance of a Compact Broadband Printed Dipole Antenna with Split-Ring Resonators [PDF]

Journal of the Korean Institute of Electromagnetic Engineering and Science, 2019
This paper presents the effects of the position of the split of a split-ring resonator (SRR) on the performance of a composite broadband printed dipole antenna.
Kam Eucharist Kedze, Heesu Wang, Ikmo Park   +2 more
doaj   +1 more source

Magnetoelectric Dipole Antenna Arrays [PDF]

IEEE Transactions on Antennas and Propagation, 2014
A planar magnetoelectric (ME) dipole antenna array is proposed and demonstrated by both full-wave analysis and experiments. The proposed structure leverages the operation of composite right/left-handed transmission lines under balanced conditions to form high-gain magnetic radiators, combined with radial conventional electric radiators, where the ...
Jiang, L, Gupta, S, Caloz, C
openaire   +4 more sources

Evaluation of 8-Channel Radiative Antenna Arrays for Human Head Imaging at 10.5 Tesla

Sensors, 2021
For human head magnetic resonance imaging at 10.5 tesla (T), we built an 8-channel transceiver dipole antenna array and evaluated the influence of coaxial feed cables.
Myung Kyun Woo, Lance DelaBarre, Matt Thomas Waks, Young Woo Park, Russell Luke Lagore, Steve Jungst, Yigitcan Eryaman, Se-Hong Oh, Kamil Ugurbil, Gregor Adriany   +9 more
doaj   +1 more source

DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets, N. P. Yeliseyeva, S. L. Berdnyk, O. M. Horobets   +3 more
doaj   +1 more source

Analysis and Simulation of a Sequential Rotationally Excited Circular Polarized Multi-Dipole Array for a Bi-Static Antenna GPR for Deep Exploration

Remote Sensing, 2023
As an effective active remote sensing technology for the exploration of shallow underground targets, ground-penetrating radar (GPR) is a detection method that can be used to obtain information about the characteristics of underground targets by ...
Haifeng Fan, Yiming Zhang, Qianqian Tian, Xuhong Wang, Hongyan Meng   +4 more
doaj   +1 more source

Gain Characteristic Maintained, Miniaturized LPDA Antenna Using Partially Applied Folded Planar Helix Dipoles

IEEE Access, 2018
The miniaturization of a compact planar log-periodic dipole array (LPDA) antenna usually comes with a side effect of the gain deterioration phenomenon.
Geonyeong Shin, Myeongjun Kong, Su-Hyeon Lee, Sang-Tae Kim, Ick-Jae Yoon   +4 more
doaj   +1 more source

Disentangling Bulk and Surface Contributions to Charge and Discharge Fading in High‐Voltage LiCoO2

Advanced Functional Materials, EarlyView.
High‐voltage operation of LiCoO2 accelerates capacity fading through bulk and surface degradation. By introducing a LiTaO3 coating to selectively suppress surface degradation, bulk and surface contributions to charge and discharge fading are decoupled.
Hyungjoon Moon, Sangbin Park, Jaewoo Jung, Seongeun Lee, Chanwoo Jung, Min‐Sik Park, Won‐Sub Yoon   +6 more
wiley   +1 more source

Balancing Hydrophobicity and Hydrophilicity: Dual Filler‐Engineered Proton Exchange Membranes for Durable, High‐Power Fuel Cells

Advanced Functional Materials, EarlyView.
Polarity‐matched Zr–MOFs program Nafion's nanoscale morphology during solution casting. Hydrophilic UiO‐66 preserves hydrated pathways, while hydrophobic UiO‐67 increases the proton hopping sites by densifying ionic clusters. Combining both fillers yields a membrane that delivers 176 mS cm−1 conductivity, reaches 1.46 W cm−2 under 200 kPa, and triples ...
Yonghwi Cho, Yunseong Ji, Minkyu Choi, Junsu Kim, Yejin Kim, Su Jeong Lee, Wooyoung Choi, Choong Hoo Lee, Ju Yeon Kim, Ohchan Kwon, Hanim Kim, Du Yeol Ryu, Ki Chul Kim, Dae Woo Kim   +13 more
wiley   +1 more source