A three-dimensional finite difference time-domain (FDTD) method is used to characterise inset dielectric guide (IDG) and the rectangular waveguide to IDG transition. Propagation constants and characteristic impedances of the fundamental modes are calculated and subsequently used to obtain the Sparameters of the transition. Three different definitions of the characteristic impedance are applied and a simple averaging technique to compute the power flow along the guide is investigated. The transition is also characterised experimentally and good agreement between measured and numerical results is observed. Further, the finite dimensions of the waveguide flange are investigated for the first time, and are seen to affect results.
|Number of pages||5|
|Journal||IEE Proceedings: Microwaves, Antennas and Propagation|
|Publication status||Published - 1 Dec 1997|
- Finite difference time domain
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering