Summary
International Symposium on Antennas and Propagation
2010
Session Number:3TE3
Session:
Number:3TE3-2
Transmission Area through the Small Aperture Backed by Lossy Cavity
Jong Hwan Lee, Hyuk Woo Son, Ji Whan Ko, Young Ki Cho,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
The various problems of electromagnetic coupling from one region to another through a aperture have been studied in the electromagnetic community. The work by Harrington [1] on a long rectangular aperture with capacitor installed in the middle of the aperture showed that effective transmission area(transmitted power normalized to incident power density) is 3λ2 /4π [m2 ]. Recently several differently shaped apertures[2,3] have been introduced to demonstrate that effective transmission area can be also 3λ2 /4π [m2 ] under resonant condition. When an aperture is backed by a lossy cavity, what the maximum transmission area through the small coupling aperture will be is a natural curiosity. In order to solve the curiosity, a rectangular cavity with a small coupling rectangular aperture is investigated in this paper. In 1982, Liang[4] studied on the similar problem to the present one but he did not obtain the maximum transmission area. So we are going to focus our attention to investigating the condition for the maximum transmission through the small coupling aperture backed by lossy cavity. In particular the effect of the end wall conductivity on the internal field inside the cavity is examined by use of the approximate perturbation method.