Time and Frequency Bias in Extrapolating Wideband Responses of Resonant Structures

被引:2
|
作者
Frye, J. Michael [1 ]
Martin, Anthony Q. [1 ]
机构
[1] Clemson Univ, Holcombe Dept Elect & Comp Engn, Clemson, SC 29634 USA
关键词
Broadband; cavities; extrapolation; genetic algorithms; multiresonant antenna; DOMAIN RESPONSES; ANTENNAS;
D O I
10.1109/TAP.2009.2033285
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
An improved technique is presented to extrapolate a wideband electromagnetic response of a resonant structure using only early-time and low-frequency computed data. The response is represented as a sum of weighted polynomials and pole terms. Previously, poles were estimated from early-time data. In this paper, poles are also estimated from low-frequency data and used to accurately extrapolate a response. A time or frequency bias is observed when estimating poles from either early-time or low-frequency data, respectively. It is shown that poles estimated from early-time and low-frequency data can be combined to reduce the amount of directly-computed data needed to accurately extrapolate a response. A genetic algorithm is used to select all necessary parameters and determine when enough data has been computed. The driving-point current of several resonant antennas and the electric field at a point outside of a metallic cavity are extrapolated.
引用
收藏
页码:3934 / 3941
页数:8
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