Results 31 to 40 of about 1,561,844 (236)

Analysis of micro-slotline leaky wave antenna with FDTD

open access: yesTongxin xuebao, 2006
The FDTD method modeled the micro-slotline leaky wave antenna successfully.The traveling wave of micro-slotline leaky-wave antenna in leaky region had been shown up with FDTD method.A new and effective equation was proposed,to calculate the complex ...
LI Yuan-xin, LONG Yun-liang
doaj   +2 more sources

Plasmonic leaky wave antenna based on modulated radius of cylindrical graphene waveguide

open access: yesAIP Advances, 2021
In this paper, the concept, analysis, and synthesis of a novel plasmonic leaky wave antenna (LWA) based on the modulated radius of a cylindrical graphene waveguide (CGW) at the terahertz band are presented. Devices based on the planar graphene waveguide (
Hadi Soleimani, Homayoon Oraizi
doaj   +1 more source

Frequency Reconfigurable Beam Scanning Squarely Modulated Reactance Surface Antenna With Period and Surface Reactance Control

open access: yesIEEE Access, 2023
In this study, a novel antenna design is proposed for designing a frequency-reconfigurable wide-angle beam scanning antenna and applied to a squarely modulated reactance surface leaky wave antenna.
Doohyun Yang, Sangwook Nam
doaj   +1 more source

45° Linearly Polarized and Circularly Polarized High-Scanning-Rate Leaky-Wave Antennas Based on Slotted Substrate Integrated Waveguide

open access: yesIEEE Access, 2020
A class of 45° linearly polarized and circular polarized high scanning rate leaky wave antennas are proposed in this paper, which is based on slow-wave substrate integrated waveguide structure.
Jianwen Zhong   +2 more
doaj   +1 more source

Compact Leaky Wave Antenna using Ferroelectric Materials [PDF]

open access: yes, 2012
Leaky wave antenna continuously attracts a lot interests for tuning the radiation direction over a large angle. Various types of leaky wave antenna have been developed since 1940.
Jeon, Hyung Min
core   +2 more sources

High Efficiency and Broadband Microstrip Leaky-Wave Antenna

open access: yesActive and Passive Electronic Components, 2008
A novel layout of leaky-wave antennas based on tapered design has been proposed and investigated. The new tapered leaky-wave antenna (LWA) was designed running a simple procedure which uses an FDTD code, and using a suitable metal walls down the ...
Onofrio Losito
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

open access: yesAdvanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara   +8 more
wiley   +1 more source

Double Structure Broadband Leaky Wave Antenna [PDF]

open access: yes, 2011
A leaky wave antenna contains a first and a second leaky wave antenna structure back to back against each other. Each antenna structure comprises a dielectric body and an elongated wave carrying structure, such as a slot in a conductive ground plane.
Neto, A., Dijk, R. van, Filippo, M.
core   +1 more source

Improving directional radiation quality based on a gradient amplitude acoustic leaky wave antenna

open access: yesNew Journal of Physics, 2019
In this work, we show how to modify radiation amplitude with a leaky wave antenna to improve the quality of sound radiation. The designed gradient amplitude leaky wave antenna consists of a straight pipe with periodically loaded membranes, open channels ...
Jun Lan   +4 more
doaj   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

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