نتایج جستجو برای: vivaldi

تعداد نتایج: 336  

Journal: :Applied sciences 2023

In this work, a novel metamaterial lens (metalens) is designed and optimized to improve the radiation performance of an antipodal Vivaldi antenna for wideband applications. The metalens integrated into substrate, placed close tapered slot in end-fire direction, allowing preservation lightweight compactness antenna. prototype has been fabricated characterized, demonstrating good agreement with s...

2004
Angelos Alexanian Huan-Shang Tsai

Previously reported quasi-optical amplifier arrays have limited bandwidth and suffer from poor input/output isolation. These prsbllems can be solved by using traveling wave antennas and distributed amplifier techniques. FII'TD simulations of a linearly tapered slot array topology demonstrate very broadband quasioptical transitions are feasible with small unitcell aperture. Experiments using a s...

2018
Xiang Liu Mohammed Serhir Marc Lambert Lionel Pichon X. LIU M. SERHIR L. PICHON

In this paper, a comparison of two ground penetrating radar (GPR) systems is presented, the classical bi-static one and the Multiple Input Multiple Output (MIMO) system both using N Vivaldi antennas. For both configurations a Linear Sampling Metthod (LSM) imaging algorithm and Kirchhoff migration technique are used for target detection and localization. The performance of both systems are compa...

Journal: :Experimental Mathematics 2011
Pierre Arnoux Julien Bernat Xavier Bressaud

We consider a substitutive version of the Arnoux-Yoccoz Interval Exchange Transformation (IET) related to the Tribonacci substitution. We construct the so-called stepped lines associated to the fixed points of the substitution in the Abelianisation (symbolic) space. We analyse various projections of the stepped line recovering the Rauzy Fractal, a Peano Curve related to the work of Arnoux [1], ...

Journal: :Elektronika ir Elektrotechnika 2016

2017
Viviana Cotik Horacio Rodríguez Jorge Vivaldi

http://dx.doi.org/10.1016/j.jksuci.2016.10.004 1319-1578/ 2016 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). ⇑ Corresponding author. E-mail addresses: [email protected] (V. Cotik), [email protected] (H. Rodríguez), [email protected] (J. ...

Journal: :Journal of Infrared, Millimeter, and Terahertz Waves 2020

Journal: :IEEE Open Journal of Antennas and Propagation 2021

The first electrically steerable dual-polarized Ka-band Vivaldi antenna array with connector-less, surface-mount interface is developed. includes integrated coaxial feed lines within the element structure and contact pads on PCB. covers frequency range from 26 to 40 GHz a beam steering of approximately ±60° in elementary planes ±50° diagonal plane, having less than 3 dB scan loss. 8×8 manufactu...

2017
Jawad Ali Shaharil Mohd Shah

This paper presents a comparative review study on ultra-wideband (UWB) antenna technology for Ground Penetrating Radar (GPR) applications. The proposed antenna designs for UWB ground penetrating radar include a bow-tie antennas, Vivaldi antennas, horn antennas, planar antennas, tapered slot antennas, dipole antennas, and spiral antennas. Furthermore a comprehensive study in terms of operating f...

Journal: :The Journal of Korean Institute of Electromagnetic Engineering and Science 2018

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