Novel time-domain asymptotic solution for transient whispering-gallery mode radiation from a cylindrical concave conducting boundary

被引：6

作者：

Goto, Keiji ^{[1
]}

Kawano, Toru ^{[1
]}

Ishihara, Toyohiko ^{[1
]}

机构：

[1] Natl Def Acad, Dept Commun Engn, Yokosuka, Kanagawa 2398686, Japan

来源：

IEICE ELECTRONICS EXPRESS | 2008年 / 5卷 / 22期

关键词：

time-domain; asymptotic solution; transient whispering-gallery mode; radiation field; cylindrical concave conducting boundary;

D O I：

10.1587/elex.5.983

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We derive a novel time-domain asymptotic solution for a transient whispering-gallery (WG) mode radiation from the aperture plane of a cylindrical concave conducting boundary. The WG mode is excited by a Gaussian-type modulated pulse source. We show that the WG mode radiation field propagates with the phase velocity coincident with the speed of light and the newly derived group velocity. The validity of the time-domain asymptotic solution is confirmed by comparing with the reference solution calculated numerically. We show that the asymptotic solution proposed here is easy to understand the physical phenomena of the transient WG mode radiation field.

引用

页码：983 / 989

页数：7

共 43 条

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