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Design criteria of X-wave launchers for millimeter-wave applications

Published online by Cambridge University Press:  27 May 2019

Walter Fuscaldo*
Affiliation:
Department of Information Engineering, Electronics and Telecommunications (DIET),Sapienza University of Rome, 00184 Rome, Italy
Santi C. Pavone
Affiliation:
Department of Information Engineering and Mathematics (DIISM), University of Siena, 53100 Siena, Italy
Davide Comite
Affiliation:
Department of Information Engineering, Electronics and Telecommunications (DIET),Sapienza University of Rome, 00184 Rome, Italy
Guido Valerio
Affiliation:
Laboratoire d'Électronique et Électromagnétisme, Sorbonne Université, L2E, F-75005 Paris, France
Matteo Albani
Affiliation:
Department of Information Engineering and Mathematics (DIISM), University of Siena, 53100 Siena, Italy
Mauro Ettorre
Affiliation:
Institut d'Électronique et de Télécommunications de Rennes (IETR), UMR CNRS 6164, Université de Rennes 1, 35042 Rennes, France
Alessandro Galli
Affiliation:
Department of Information Engineering, Electronics and Telecommunications (DIET),Sapienza University of Rome, 00184 Rome, Italy
*
Author for correspondence: Walter Fuscaldo E-mail: walter.fuscaldo@uniroma1.it

Abstract

Bessel-beam launchers are promising and established technologies for focusing applications at microwaves. Their use in time-domain leads to the definition of a new class of devices, namely, the X-wave launchers. In this work, we discuss the focusing features of such devices with a specific interest at millimeter waves. The spatial resolutions of such systems are described under a rigorous mathematical framework to derive novel operating conditions for designing X-wave launchers. These criteria might be particularly appealing for specific millimeter-wave applications. In particular, it is shown that an electrically large aperture is not strictly required, as it seemed from previous works. However, the use of an electrically small aperture would demand a considerably wideband capability. The various discussions presented here provide useful information for the design of X-wave launchers. This aspect is finally shown with reference to the practical design of two different X-wave launchers.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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