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International Journal of Antennas and Propagation
Volume 2014, Article ID 431602, 8 pages
Research Article

Microwave Tomographic Imaging Utilizing Low-Profile, Rotating, Right Angle-Bent Monopole Antennas

1Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, Canada T2N 1N4
2Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH 03755, USA
3Department of Radiology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA
4Norris Cotton Cancer Center, Dartmouth Hitchcock Medical Center, Lebanon, NH 03756, USA
5Advanced Surgical Center, Dartmouth Hitchcock Medical Center, Lebanon, NH 03756, USA

Received 2 May 2014; Accepted 5 June 2014; Published 29 June 2014

Academic Editor: Dau-Chyrh Chang

Copyright © 2014 N. R. Epstein 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 have developed a simple mechanism incorporating feedline bends and rotary joints to enable motion of a monopole antenna within a liquid-based illumination chamber for tomographic imaging. The monopole is particularly well suited for this scenario because of its small size and simplicity. For the application presented here a full set of measurement data is collected from most illumination and receive directions utilizing only a pair of antennas configured with the rotating fixture underneath the imaging tank. Alternatively, the concept can be adapted for feed structures entering the tank from the sides to allow for measurements with vertically and horizontally polarized antennas. This opens the door for more advanced imaging applications where anisotropy could play an important role such as in bone imaging.