Abstract
AbstractIn this paper, TV ghosts produced by the metal suspension cables of a large suspension bridge are studied. Improvement of the D/U ratio at the receiving point is investigated. It is demonstrated by calculations and experiments that by loading the metal cylinders with a cylindrical ferrite, the relative scattering intensity in the 0 to 90° range in the horizontal plane can be reduced. By loading cylindrical dielectric materials the relative scattering intensity can be reduced by about 8 dB, while scattering in other directions increases. Hence, by using a cylindrical absorber made of a combination of a dielectric material and rubber ferrite, suppression of the scattering at more than 90° on one side is investigated. Theoretical calculations of the scattering properties are carried out by means of the multiple multipole program (MMP) method. It is shown that the relative scattering intensity near 120° can be reduced to less than –10 dB without increase of scattering in other directions. It is therefore shown theoretically that the D/U ratio can be improved. © 2001 Scripta Technica, Electron Comm Jpn Pt 2, 84(11): 41–50, 2001
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 callMore From: Electronics and Communications in Japan (Part II: Electronics)
Disclaimer: 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.
