Results 11 to 20 of about 185,082 (262)

Dual‐band electrochromic materials for energy‐saving smart windows

Carbon Neutralization, 2023
Smart windows refer to those which can dynamically modulate the transmitted light by changing their colors. Dual‐band electrochromic materials (ECMs) refer to materials that can change their colors and regulate light transmission in both visible (VIS ...
Siming Zhao, Baoshun Wang, Na Zhu, Ya Huang, Fei Wang, Run Li, Yanlong Zhao, Qinyuan Jiang, Xueke Wu, Rufan Zhang   +9 more
doaj   +2 more sources

Dual-Band Infrared PbS Colloidal Quantum Dot Focal Plane Array [PDF]

Nature Communications
Near-infrared and short-wave infrared dual-band detection has emerged as a pivotal enabling technology in across diverse applications spanning material identification, biological diagnostics, and machine vision.
Yunxiang Di, Kun Ba, Lingfeng Ye, Qianru Zhao, Xingyu Qi, Weiyi Tang, Hanting Wang, Yi Long, Yan Chen, Xudong Wang, Zhangcheng Huang, Shenyang Huang, Yun Tang, Tie Lin, Hong Shen, Xiangjian Meng, Hugen Yan, Qi Liu, Jianlu Wang, Junhao Chu, Ming Liu   +20 more
doaj   +2 more sources

Compact Dual-Band Dual-Polarized Base-Station Antenna Array With a Small Frequency Ratio Using Filtering Elements

IEEE Access, 2019
This paper presents a compact dual-band ±45° dual-polarized base-station array based on embedded filtering elements. The proposed antenna array consists of 9 dual-band antenna units, which operate at the lower band (LB) of 790-862 MHz and ...
Wen Duan, Yun Fei Cao, Yong-Mei Pan, Zhi Xing Chen, Xiu Yin Zhang   +4 more
doaj   +3 more sources

Photonic Generation and Transmission of Dual-Band Dual-Chirp Microwave Waveforms at C-Band and X-Band With Elimination of Power Fading

IEEE Photonics Journal, 2021
We propose a photonic method to generate and transmit dual-band dual-chirp microwave waveforms based on a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM).
Lu Wang, Tengfei Hao, Guangyi Li, Wenhui Sun, Ming Li, Ninghua Zhu, Wei Li   +6 more
doaj   +1 more source

Photonic Generation of Switchable Dual-Band Dual-Chirp Microwave Waveforms

IEEE Photonics Journal, 2022
In this article, a photonic scheme based on dual-drive dual-parallel Mach-Zehnder modulator (DD-DPMZM) to generate switchable dual-band dual-chirp microwave waveforms is proposed and experimentally demonstrated.
Shuaiquan Yu, Shuna Yang, Bo Yang, Hao Chi   +3 more
doaj   +1 more source

Fingerprint Positioning Method for Dual-Band Wi-Fi Based on Gaussian Process Regression and K-Nearest Neighbor

ISPRS International Journal of Geo-Information, 2021
Since many Wi-Fi routers can currently transmit two-band signals, we aimed to study dual-band Wi-Fi to achieve better positioning results. Thus, this paper proposes a fingerprint positioning method for dual-band Wi-Fi based on Gaussian process regression
Hongji Cao, Yunjia Wang, Jingxue Bi, Meng Sun, Hongxia Qi, Shenglei Xu   +5 more
doaj   +1 more source

A Novel Dual Band Branch Line Coupler and its Application to Design a Dual Band 4 × 4 Butler Matrix

IEEE Access, 2020
A novel dual band branch line coupler (BLC) has been proposed, designed, implemented, and analyzed in this paper. A dual band 4 $\times 4$ Butler matrix (BM) has also been developed by employing the proposed BLC.
Aijaz M. Zaidi, Mirza Tariq Beg, Binod K. Kanaujia, Jugul Kishor, Karumudi Rambabu   +4 more
doaj   +1 more source

Dual Band Filter-Antenna with Fixed Low Band and Frequency-Agile High Band for Wireless Communications

Advanced Electromagnetics, 2020
This work proposes a design of compact filter-antenna with fixed and frequency-agile bands for wireless communications and cognitive radio (CR) systems.
H. A. Atallah
doaj   +1 more source

Compact Dual Band Antenna Design for Ku / Ka Band Applications

Advanced Electromagnetics, 2017
This communication proposes a compact 16 GHz / 30 GHz dual band antenna design for Ku / Ka band applications. The antenna consists of two layers with lower layer having the fed patch and the upper layer having non-periodic element array.
A. Kandwal
doaj   +1 more source

Extended Composite Right/Left-Handed Transmission Line and Dual-Band Reactance Transformation

Journal of Electrical and Computer Engineering, 2010
An extended composite right/left-handed transmission line is introduced, and its dual-band bandpass filter characteristics are explored. Novel reactance transformations, derived from this transmission line, are formulated to transform a low-pass ...
Yuming Zhang, Barry Spielman
doaj   +1 more source