Results 61 to 70 of about 42,931 (308)

An Optically Transparent Water‐Based Metamaterial Absorber for Ultra‐Broadband EMI Shielding in Coal Mines

Advanced Science, EarlyView.
This study introduces a novel metamaterial absorber integrating water as a lossy medium with patterned indium tin oxide (ITO) films to achieve simultaneous optical transparency and ultra‐wideband electromagnetic absorption over 0.52‐40 GHz. It effectively overcomes the limitations of conventional opaque and bulky shielding materials, offering a ...
Xiaojun Huang, Lina Gao, Yidan Xu, Yifei Wang, Wei Hou, Yu Luo   +5 more
wiley   +1 more source

A Compact Vivaldi Shaped Partially Dielectric Loaded TEM Horn Antenna for UWB Communication

International Journal of Antennas and Propagation, 2014
Ultrawideband (UWB) antennas are of huge demand and Vivaldi antennas as well as the TEM horn antennas are good candidates for UWB applications as they both have relatively simple geometry and high gain over a wide bandwidth.
Mustafa İlarslan, A. Serdar Türk, Salih Demirel, M. Emre Aydemir, A. Kenan Keskin   +4 more
doaj   +1 more source

Millimeter and submillimeter wave antenna structure [PDF]

, 1989
An integrated circuit antenna structure for transmitting or receiving millimeter and/or submillimeter wave radiation having an antenna relatively unimpaired by the antenna mounting arrangment is disclosed herein.
Rebiez, Gabriel M., Rutledge, David B.
core   +1 more source

Wideband H‐plane dielectric horn antenna

IET Microwaves, Antennas & Propagation, 2017
By flaring a dielectric waveguide in the H ‐plane, an H ‐plane dielectric horn is formed, which could be directly excited by an SIW feed. However, matching and radiation performances are poor due to the thinness of the substrate.
Wang, Lei, Garcia-Vigueras, Maria, Alvarez-Folgueiras, Marcos, Mosig, Juan R.   +3 more
openaire   +3 more sources

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Enhancing the Radiation Performance of a Pyramidal Horn Antenna by Loading a Subwavelength Metasurface

IEEE Access, 2017
We present the detailed design and experimental demonstration of a low-sidelobe horn antenna based on controlling the amplitude and the phase distribution of the electromagnetic fields over the aperture of the horn antenna using a thin single-layer ...
Xuxiang Chen, Yuehe Ge
doaj   +1 more source

Antenna Miniaturization Based on Supperscattering Effect [PDF]

, 2012
Antennas are essential components of all existing radio equipments. The miniaturization of antenna is a key issue of antenna technology. Based on supperscattering effect, we found that when a small horn antenna is located inside of a dielectric core and ...
Huang, M., Mao, F. C., Sun, J., Yang, J. J.   +3 more
core   +1 more source

Remote Activation of Spinal TRPV1 by Magnetic Nanocubes Confers Cardioprotection Against Myocardial Ischemia‐Reperfusion Injury

Advanced Science, EarlyView.
Fe‐based magnetic nanocubes conjugated with TRPV1 antibodies (FeNCs‐TRPV1) are developed for the specific targeting of TRPV1 channels. Intraspinally injected FeNCs‐TRPV1 induces TRPV1 desensitization in rats exposed to repetitive and transient ACMF.
Xueying Cheng, Shuangyu Liu, Yu Zhang, Kang Peng, Muge Qile, Chao Wu, Mengyun Dou, Liu Liu, Na Yang, Rui Liu, Guiyang Zhang, Liangping Ni, Gaolin Liang, Fang Yang, Ye Zhang, Shufang He   +15 more
wiley   +1 more source

A configuration to double the gain of pyramidal horn antenna using single layer frequency selective surface

IET Microwaves, Antennas & Propagation
A gain enhancement technique in pyramidal horn antenna using a slot type band pass frequency selective surface (FSS) is presented. The horn antenna without FSS has achieved a measured gain of 10.5 dBi at 10 GHz, while the antenna with the single layer ...
Kalyan Mohan Patnaik, Gowrish Basavarajappa   +1 more
doaj   +1 more source

Antenna pattern control using impedence surfaces [PDF]

During this research period, September 16, 1990 to March 15, 1991, a design method for selecting a low-loss impedance material coating for a horn antenna pattern control has been developed.
Balanis, Constantine A., Liu, Kefeng
core   +1 more source