Results 41 to 50 of about 464,771 (298)

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

Line-distortion, Bandwidth and Path-length of a graph [PDF]

open access: yes, 2014
We investigate the minimum line-distortion and the minimum bandwidth problems on unweighted graphs and their relations with the minimum length of a Robertson-Seymour's path-decomposition.
A. Gupta   +15 more
core   +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

A New Class of High-Selectivity Bandpass Filters With Constant Bandwidth and 5:1 Bandwidth Tuning Ratio

open access: yesIEEE Access
This paper presents a design for compact bandpass filters (BPFs) that feature high selectivity. This high selectivity is achieved through the use of open-/short-circuited coupled-line segments at the filter’s input and output and a pair of ...
Photos Vryonides   +4 more
doaj   +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

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

Spectral model selection in the electronic measurement of the Boltzmann constant by Johnson noise thermometry

open access: yes, 2017
In the electronic measurement of the Boltzmann constant based on Johnson noise thermometry, the ratio of the power spectral densities of thermal noise across a resistor at the triple point of water, and pseudo-random noise synthetically generated by a ...
Coakley, Kevin J, Qu, Jifeng
core   +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

Design of Wideband and High-Gain Slotline Antenna Using Multi-Mode Radiator

open access: yesIEEE Access, 2019
In this paper, a novel wideband slotline antenna with high gain characteristic is presented by using a multi-mode radiator under the circumstance of the optimized ground plane.
Xiaokun Bi   +3 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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