A FREQUENCY-HOPPING APPROACH FOR MICROWAVE IMAGING OF LARGE INHOMOGENEOUS BODIES

被引：155

作者：

CHEW, WC

LIN, JH

机构：

[1] Electromagnetics Laboratory, Department of Electrical and Computer Engineering, University of Illinois, Urbana

来源：

IEEE MICROWAVE AND GUIDED WAVE LETTERS | 1995年 / 5卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/75.481854

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：

A frequency-hopping approach is proposed to process multifrequency CW microwave measurement data so that larger dielectric bodies for microwave imaging can be reconstructed with higher fidelity compared to a single-frequency reconstruction. The frequency hopping approach uses only data at a few frequencies, and hence can reduce data acquisition time in a practical system. Moreover, the frequency-hopping approach overcomes the effect of nonlinearity in the optimization procedure so that an algorithm is not being trapped in local minima. In this manner, larger objects with higher contrasts could be reconstructed without a priori information. We demonstrate the reconstruction of an object 10 wavelengths in diameter with permittivity profile contrast larger than 1:2 without using a priori information.

引用

页码：439 / 441

页数：3

共 12 条

[1]

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[3]

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