Results 41 to 50 of about 3,627,033 (322)

Modification of Hot-Wire Anemometers Frequency Bandwidth Measurement Method

open access: yesSensors, 2020
In measurements of fast-changing flows, one of the key issues is knowledge of the anemometer frequency bandwidth. In such measurements, the measurement technique often used is hot-wire anemometry.
Paweł Ligęza
doaj   +1 more source

Comparative Analysis of Multi-Substrate Materials in Microstrip Antenna Models for Broadband Wireless Communications

open access: yesInternational Journal of Electronics and Communications System, 2022
Multi-substrate antenna material is a combination of more than one primary antenna base material where this substrate material can determine the quality of antenna performance.
Budi Herdiana
doaj   +1 more source

Dynamic Traitor Tracing for Arbitrary Alphabets: Divide and Conquer [PDF]

open access: yes, 2012
We give a generic divide-and-conquer approach for constructing collusion-resistant probabilistic dynamic traitor tracing schemes with larger alphabets from schemes with smaller alphabets.
Doumen, Jeroen   +2 more
core   +4 more sources

The computation of parameters of induction current sensor based on Rogowski coil

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
This paper presents a simple and practical technique of Rogowski transducers for measuring small currents at low frequencies. The parameters of the Rogowski coil with the affiliate integrator is established to deduce the transfer functions. Main features
O. A. Glukhov, D. O. Glukhov
doaj   +1 more source

A Nonlinear-Model-Based High-Bandwidth Current Sensor Design for Switching Current Measurement of Wide Bandgap Devices

open access: yesSensors, 2023
With the growing adoption of wide bandgap devices in power electronic applications, current sensor design for switching current measurement has become more important.
Xia Du   +5 more
doaj   +1 more source

Gain Enhancement and Cross-Polarization Suppression of Cavity-Backed Antennas Using a Flared Ground Cavity and Iris

open access: yesSensors, 2023
Herein, we present new design principles for gain enhancement and cross-polarization suppression in dual-polarized cavity-backed antennas and demonstrate the capability in an octagonal cavity-backed open prism antenna (OCROP).
Yanxia Liu   +2 more
doaj   +1 more source

Signal detection with spectrum windows

open access: yesHeliyon, 2022
Spectrum sensing is needed in frequency agile cognitive radio systems, cognitive radar systems as well as in (cognitive) electronic warfare systems. This paper studies window based detectors where window shapes can be matched for the expected spectrum ...
Harri Saarnisaari, Johanna Vartiainen
doaj   +1 more source

An Op-Amp Approach for Bandpass VGAs With Constant Bandwidth

open access: yesIEEE Transactions on Circuits and Systems - II - Express Briefs, 2018
Two approaches to implement variable gain amplifiers based on Miller op-amps are discussed. One has true constant bandwidth while the other has essentially reduced bandwidth variations with varying gain.
S. Pourashraf   +4 more
semanticscholar   +1 more source

A Seamless Broadcasting Scheme with Live Video Support

open access: yesInternational Journal of Digital Multimedia Broadcasting, 2012
Broadcasting schemes, such as the fast broadcasting and harmonic broadcasting schemes, significantly reduce the bandwidth requirement of video-on-demand services. In the real world, some history events are very hot.
Zeng-Yuan Yang   +2 more
doaj   +1 more source

Square Slot Antenna for Wide Circularly Polarized Bandwidth and Axial Ratio Beamwidth

open access: yesElectrical, Control and Communication Engineering, 2021
The article proposes design investigation and experimental results of a coplanar waveguide (CPW) fed square slot antenna that gives wideband circular polarization.
Sharma Vijay, Jhajharia Tejpal
doaj   +1 more source

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