Results 101 to 110 of about 59,565 (296)

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

Miniaturized Wideband Antenna Prototype Operating over the Ku-Band. [PDF]

Micromachines (Basel), 2022
Shrestha S, Zahra H, Kiyani A, Asadnia M, Abbas SM, Mahmoud A.   +5 more
europepmc   +1 more source

Energy‐Efficient Bulk Photoalignment of Main‐Chain Liquid Crystalline Polymers Enabled by In Situ Monitoring

Advanced Functional Materials, EarlyView.
In situ monitoring of bulk photoalignment reveals how molecular weight, azobenzene content, cooling rate, and thickness govern ordering in main‐chain liquid crystalline polymers. Optimized copolymers exceed conventional thickness limits, maintaining stable alignment up to 130 µm with high energy efficiency and reversible optical patterning.
Jaechul Ju, Joy Zhou, Connor J. O'Dea, Zachariah A. Page   +3 more
wiley   +1 more source

Wideband/Dual-Band Dielectric Filtering Inverted-L Antenna With Reflective and Quasi-Reflectionless Radiation Nulls

IEEE Open Journal of Antennas and Propagation
A class of dielectric filtering inverted-L antenna with reflective- and quasi-reflectionless-type radiation nulls is proposed to achieve wideband or dual-band operation.
Wen Zheng, Shiyan Wang, Yin Li, Zai-Cheng Guo, Gang Zhang, Li Yang, Roberto Gomez-Garcia   +6 more
doaj   +1 more source

A Low Profile Ultra-Wideband Antenna with Reconfigurable Notch Band Characteristics for Smart Electronic Systems. [PDF]

Micromachines (Basel), 2022
Zaidi A, Awan WA, Ghaffar A, Alzaidi MS, Alsharef M, Elkamchouchi DH, Ghoneim SSM, Alharbi TEA.   +7 more
europepmc   +1 more source

Compact and Broadband Microstrip-Line-Fed Modified Rhombus Slot Antenna [PDF]

, 2013
The printed microstrip-line-fed broadband rhombus slot antenna is investigated in this paper. With the use of the offset microstrip feed line and the corner-truncated protruded ground plane, the bandwidth enhancement and the slot size reduction for the ...
Jan, J. Y., Pan, C. Y., Wang, L. C.
core   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Non-Foster Impedance Wideband Matching Technique for Electrically Small Active Antenna

International Journal of Antennas and Propagation, 2013
This paper investigates a non-Foster wideband circuit matching technique for an electrically small antenna (ESA). By introducing a negative impedance convertor into an active network, the active network can obtain an equivalent input gain at input port ...
Wenxing Li, Ning Zhai, Ruilong Chen, Wenhua Yu   +3 more
doaj   +1 more source

On Rapid Re-Design of UWB Antennas with Respect to Substrate Permittivity

Metrology and Measurement Systems, 2016
Re-design of a given antenna structure for various substrates is a practically important issue yet non trivial, particularly for wideband and ultra-wideband antennas. In this work, a technique for expedited redesign of ultra-wideband antennas for various
Koziel Slawomir, Bekasiewicz Adrian
doaj   +1 more source

Influence of Various Technologies on the Quality of Ultra-Wideband Antenna on a Polymeric Substrate. [PDF]

Polymers (Basel), 2022
Lukacs P, Pietrikova A, Vehec I, Provazek P.   +3 more
europepmc   +1 more source