DocumentCode :
1445935
Title :
Input admittance of a circular waveguide aperture loaded with an iris
Author :
Deshpande, M.D. ; Das, B.N.
Author_Institution :
Indian Institute of Technology, U.H.F. and Microwave Laboratory, Kharagpur, India
Volume :
122
Issue :
8
fYear :
1975
fDate :
8/1/1975 12:00:00 AM
Firstpage :
795
Lastpage :
799
Abstract :
An expression for the input admittance of a circular aperture in an infinite groundplane, excited by a circular waveguide having diameter different from that of the aperture, is derived by using the principle of conservation of the flux of reaction. Assuming a TE11 mode field variation at the aperture, contributions of the TE and TM plane-wave components to the complex radiated power, and hence to the aperture admittance, are determined. A method for obtaining one of the integrals appearing in the expression for aperture admittance and another one in the form of convergent series is presented. The computation of input admittance is performed for the aperture diameter range 0¿2b/¿<0.97. A method of quantitative estimation of the effect of higher-order modes excited at the aperture is also presented.
Keywords :
admittance; circular waveguides; circular waveguide aperture loaded with iris; input admittance;
fLanguage :
English
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
Publisher :
iet
ISSN :
0020-3270
Type :
jour
DOI :
10.1049/piee.1975.0217
Filename :
5253960
Link To Document :
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