Table of Contents
International Journal of Microwave Science and Technology
Volume 2013, Article ID 735692, 11 pages
Research Article

Design and Performance Evaluation of a Time Domain Microwave Imaging System

1Department of Signals and Systems, Chalmers University of Technology, 412-96 Gothenburg, Sweden
2Microwave Electronics Laboratory, Chalmers University of Technology, 412-96 Gothenburg, Sweden

Received 13 March 2013; Revised 17 July 2013; Accepted 15 August 2013

Academic Editor: Safieddin Safavi-Naeini

Copyright © 2013 Xuezhi Zeng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We design a time domain microwave system dedicated to medical imaging. The measurement accuracy of the system, that is, signal-to-noise ratio, due to voltage noise and timing noise, is evaluated. Particularly, the effect of coupling media on the measurement accuracy is investigated both numerically and experimentally. The results suggest that the use of suitable coupling media betters the measurement accuracy in the frequency range of interest. A signal-to-noise ratio higher than 30 dB is achievable in the range of 500 MHz to 3 GHz when the effective sampling rate is 50 Gsa/s. It is also indicated that the effect of the timing jitter on the strongest received signal is comparable to that of the voltage noise.