Radiation fields of a complex source in 2-D circular radome with metal gratings
Author
Ouardani, Slim
Advisor
Altıntaş, Ayhan
Date
1997Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
95
views
views
42
downloads
downloads
Abstract
In this thesis, the transmission effect of a two-dimensional circular radome with
periodic metal gratings is analyzed. We started with the study of gratings consisting
of periodic arrays of thin lossy strips surrounded by vacuum. Then we
investigated the behavior of such gratings if a dielectric hiyer is inserted between
them. Complex line sources are considered to simulate directed beam fields used
in practice. The fields on the interior and exterior sides of the radome are represented
by modal cylindrical waves. Taking advantage of theoretical considerations
recently published, we propose an approximate method and stress the numerical
aspect. Data is obtained for the far field solutions and the directivity, and their
dependences on different radome parameters. It appecirs that directivity variations
with beam orientation are decreased considerably by a proper insertion of
the dielectric layer.