Results 21 to 30 of about 21,050 (313)

Spectral Characteristics of the Double-Folded Slot Antennas with Cold-Electron Bolometers for the 220/240 GHz Channels of the LSPE Instrument

open access: yesApplied Sciences, 2021
We present the results of the experimental and theoretical study of the resonant properties and noise of a single cell of a receiving system based on cold-electron bolometers (CEB) with a double-folded slot antenna and coplanar lines.
Leonid S. Revin   +10 more
doaj   +1 more source

Designing Slot Antennas in Finite Platforms Using Characteristic Modes

open access: yesIEEE Access, 2018
In this paper, the application of the Theory of Characteristic Modes for the design of narrow-in-width open slot antennas embedded in finite platforms is investigated.
Nora Mohamed Mohamed-Hicho   +3 more
doaj   +1 more source

3D Printed Waveguide Slot Array Antennas

open access: yesIEEE Access, 2016
Waveguide slot array antennas can have high gain, since the power distribution network (waveguide) has low loss, enabling a large aperture size. Rapid response to requirements for frequency, gain, and skew angle inspired a search for an alternative to ...
Gregory Peter Le Sage
doaj   +1 more source

Ultra Wideband (UWB) Multiple Input and Multiple Output (MIMO) Antenna Design : A Review

open access: yesAndalas Journal of Electrical and Electronic Engineering Technology, 2023
Since the Federal Communication Commission (FCC) issued a license for the 3.1 – 10.6 GHz frequency spectrum for unlicensed radio applications, many papers have been published regarding ultrawideband (UWB) antenna design.
Firdaus Firdaus   +2 more
doaj   +1 more source

Broadband HMSIW antenna using a demi hexagonal ring slot for X-band application

open access: yesJurnal Ilmiah SINERGI
Microstrip antennas offer several advantages, including small size, easy fabrication, controllable polarity and radiation patterns, and easy integration with other components.
Dian Widi Astuti   +4 more
doaj   +1 more source

Novel antenna array configuration using miniature double box branch‐line couplers for wideband circularly polarised applications

open access: yesIET Microwaves, Antennas & Propagation, 2023
This article presents a wideband circularly polarised (CP) antenna array using a miniaturised double box branch‐line coupler. This was achieved by creating a slow wave structure by introducing open‐circuit stubs on the inside arms of the branch‐line ...
Bal S. Virdee, Tohid Aribi, Tohid Sedghi
doaj   +1 more source

Kinetic Insights into Precursor‐Assisted Soft Sphere Close Packing Revealed by In Situ GISAXS with Implications for Gas Sensing

open access: yesAdvanced Functional Materials, EarlyView.
The versatile precursor‐assisted soft sphere close packing during slot‐die coating is investigated with in situ X‐ray scattering. The soft crystallization pathways towards a close packing involve multistep structural transitions such as surface nucleation, in‐plane, and out‐of‐plane crystallization.
Guangjiu Pan   +14 more
wiley   +1 more source

Design of a high-gain dual-band LI-slotted microstrip patch antenna for 5G mobile communication systems

open access: yesJournal of Radiation Research and Applied Sciences, 2022
The microstrip patch antenna has been successfully used in modern wireless communication systems including the fifth generation (5G) applications. The focus of this paper is on the high-band millimeter waves of the 5G, particularly the 26 and 28 GHz as ...
Mouaaz Nahas
doaj   +1 more source

Biomimetic Iridescent Skin: Robust Prototissues Spontaneously Assembled from Photonic Protocells

open access: yesAdvanced Functional Materials, EarlyView.
Uniform nanoparticles are induced to form arrays (photonic crystals) in the cores of biopolymer capsules, endowing these ‘protocells’ with structural color. These protocells are then assembled into large self‐standing objects, i.e., prototissues, with robust mechanical properties as well as iridescent optical properties.
Medha Rath   +6 more
wiley   +1 more source

Ultra-Wideband Antennas for Wireless Communication Applications

open access: yesInternational Journal of Antennas and Propagation, 2019
A review paper concerning wide-band and ultra-wideband (UWB) antennas used for wireless communication purposes in terms of the materials as well as a numerical analysis is presented.
Tale Saeidi   +4 more
doaj   +1 more source

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