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

IEICE Electronics Express

Keiji Goto¹  Toru Kawano¹  Toyohiko Ishihara¹ 

[1] Department of Communication Engineering, National Defense Academy

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

DOI  :  10.1587/elex.5.983

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)Cited-By(3)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.

【 授权许可】

Unknown