Results 1 to 10 of about 2,161,600 (303)

Dual‐band electrochromic materials for energy‐saving smart windows

open access: yesCarbon 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   +9 more
doaj   +2 more sources

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

open access: yesNature 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   +20 more
doaj   +2 more sources

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

open access: yesIEEE 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   +6 more
doaj   +1 more source

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

open access: yesIEEE 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   +3 more
doaj   +1 more source

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

open access: yesISPRS 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   +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

open access: yesIEEE 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   +4 more
doaj   +1 more source

Modified U Slot Patch Antenna with Large Frequency Ratio for Vehicle-to-Vehicle Communication

open access: yesSensors, 2023
This paper presents a single-fed, single-layer, dual-band antenna with a large frequency ratio of 4.74:1 for vehicle-to-vehicle communication. The antenna consists of a 28 GHz inset-fed rectangular patch embedded into a 5.9 GHz patch antenna for dual ...
Sandhiya Reddy Govindarajulu   +4 more
doaj   +1 more source

A Dual-Band Dual-Polarized Omnidirectional Antenna

open access: yesFrontiers in Physics, 2020
A dual-band dual-polarized omnidirectional antenna is investigated. The two bands are generated by a lower circular patch and an upper circular patch, respectively.
Hui Gu, Lei Ge, Jihong Zhang
doaj   +1 more source

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

open access: yesJournal 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

Design and analysis of defected ground structure transformer for dual-band antenna

open access: yesThe Journal of Engineering, 2014
This study presents a novel dual-band antenna design methodology utilising a dual-frequency impedance transformer with defected ground structure (DGS).
Wai-Wa Choi   +4 more
doaj   +1 more source

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