Results 71 to 80 of about 673,683 (345)

Increasing bandwidth of orthogonally polarised omnidirectional antenna composed of halo and sleeve antennas

IET Microwaves, Antennas & Propagation, 2023
In this study, we developed and investigated a small‐diameter, low‐profile, wideband orthogonal‐polarisation multiple‐input multiple‐output (MIMO) antenna.
Tomokazu Mizutani, Naobumi Michishita, Hiroshi Sato, Yoshio Koyanagi, Hisashi Morishita   +4 more
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Conjoined Yet Decoupled Wideband Multiantenna MIMO Linear Patch Array

IEEE Access, 2022
A conjoined yet decoupled wideband multi-antenna MIMO linear patch array (LPA) based on using a wideband patch antenna with dual slanted (±45°) shorting metal walls as a building antenna unit (BAU) is presented.
Kin-Lu Wong, Guan-Lin Yan, Wei-Yu Li
doaj   +1 more source

A 300-800MHz Tunable Filter and Linearized LNA applied in a Low-Noise Harmonic-Rejection RF-Sampling Receiver [PDF]

, 2010
A multiband flexible RF-sampling receiver aimed at software-defined radio is presented. The wideband RF sampling function is enabled by a recently proposed discrete-time mixing downconverter. This work exploits a voltage-sensing LNA preceded by a tunable
Klumperink, Eric A.M., Nauta, Bram, Ru, Zhiyu, Saavedra, Carlos E.   +3 more
core   +3 more sources

Directive Ultra-Wideband Planar Antennas

, 2010
Since the acceptance of unlicensed use of the Ultra-Wideband (UWB) technology in the range between 3.1 and 10.6 GHz in the USA (FCC, 2002) and more recently between 3.4 and 8.5 GHz in Europe (ETSI, 2008), the realization of low-cost UWB wireless systems is considered a fundamental research goal both for military and commercial applications.
CAPOBIANCO AD, PIGOZZO FM, LOCATELLI, Andrea, MODOTTO, Daniele, DE ANGELIS, Costantino, BOSCOLO S, SACCHETTO F, MIDRIO M.   +7 more
openaire   +5 more sources

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

A Novel Miniaturized Planar Ultra-Wideband Antenna

IEEE Access, 2019
A novel miniaturized planar ultra-wideband antenna is proposed. The antenna design comprises an electromagnetically coupled structure and a tapered radiating slot, while a triangular slot is etched on the ground plane.
Lu Guo, Ming Min, W. Che, Wanchen Yang
semanticscholar   +1 more source

Near‐Infrared Emitting Lanthanide Catecholate Giant Single Crystals – Morphology Control and Photon Down‐Conversion

Advanced Functional Materials, EarlyView.
Controlled syntheses of lanthanide coordination polymers based on the dihydroxybenzoquinone (DHBQ) organic linker afforded large single crystals of Ln‐DHBQ CPs (Ln = Yb, Nd). A novel structural variant of Yb‐DHBQ is identified by means of single crystal diffraction analysis.
Marina I. Schönherr, Alexander Biewald, Andre Mähringer, Thaddäus J. Koller, Peter Mayer, Markus Döblinger, Achim Hartschuh, Dana D. Medina   +7 more
wiley   +1 more source

Detection of Salt and Sugar Contents in Water on the Basis of Dielectric Properties Using Microstrip Antenna-Based Sensor

IEEE Access, 2018
This paper presents a microstrip antenna-based sensor for detecting salt and sugar in water. The patch antenna is low-cost and low-profile and is modeled to transmit and receive an electromagnetic signal.
Mohammad Tariqul Islam, Md. Naimur Rahman, Mandeep Singh Jit Singh, Md. Samsuzzaman   +3 more
doaj   +1 more source

A Novel Planar Fractal Antenna with CPW-Feed for Multiband applications [PDF]

, 2013
In this paper, a multiband antenna using a novel fractal design is presented. The antenna structure is formed by inscribing a hexagonal slot within a circle.
Joseph, S., Mohanan, P., Mridula, S., Paul, B.   +3 more
core   +1 more source