Abstract
Author(s): Capolino, F; Bussotti, P; Borselli, L; Albani, M; Maci, S | Abstract: The problem of edge diffraction close to a point caustic is analyzed in a typical dual-reflector Gregorian antenna in offset configuration. The diffraction phenomenon is produced by a perfectly conducting fin located between the feeder and the main reflector. This fin is sometimes used to reduce the coupling between the primary feed and the main reflector. For the sake of simplicity, the two-dimensional case is studied here, but the present technique can also be applied to practical three-dimensional configurations. © 1997 John Wiley a Sons, Inc.
Highlights
High-gain reflector antennas for space applications sometimes require pressing performances of cross-polarization levels
The problem of edge diffraction close to a point caustic is analyzed in a typical dual-reflector Gregorian antenna in offset configuration
For the sake of simplicity, the two-dimensional case is studied here, but the present technique can be applied to practical three-dimensional configurations. ᮊ 1997 John Wiley & Sons, Inc
Summary
Microwave radiometry is a technique capable of distinguishing local thermal variations in concrete at thicknesses of the order of 10 cm, as a result of duct heating. The feasibility study presented in this article examines a numerical model of this application, first in the case of constant permittivity and considering the existence of a permittivity gradient within the concrete. A better agreement between theory and experiment is observed when a permittivity gradient within the concrete is taken into account
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
