Surface wave multipath signals in near-field microwave imaging.

International Journal of Biomedical Imaging
P M MeaneyK D Paulsen

Abstract

Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These issues are further exacerbated when surface waves are generated with the potential of propagating along the transmitting and receiving antenna feed lines and other low-loss paths. In this paper, we analyze the contributions of multi-path signals arising from surface wave effects. Specifically, experiments were conducted with a near-field microwave imaging array positioned at variable heights from the floor of a coupling fluid tank. Antenna arrays with different feed line lengths in the fluid were also evaluated. The results show that surface waves corrupt the received signals over the longest transmission distances across the measurement array. However, the surface wave effects can be eliminated provided the feed line lengths are sufficiently long independently of the distance of the transmitting/receiving antenna tips from the imaging tank floor. Theoretical predictions confirm the experimental observations.

References

Jan 1, 1971·Journal of Occupational Medicine. : Official Publication of the Industrial Medical Association·J E Kasik
Oct 1, 1995·IEEE Transactions on Bio-medical Engineering·P M MeaneyR K Crane
Jan 24, 2007·Academic Radiology·Paul M MeaneyKeith D Paulsen
Jan 1, 2008·International Journal of Antennas and Propagation·Colleen J FoxKeith D Paulsen

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Citations

Oct 5, 2013·Medical Physics·Paul M MeaneyKeith D Paulsen
Jul 26, 2012·IEEE Transactions on Bio-medical Engineering·Paul M MeaneyKeith D Paulsen
May 9, 2012·IEEE Transactions on Medical Imaging·Tomasz M GrzegorczykKeith D Paulsen
Jan 3, 2015·The Review of Scientific Instruments·N R EpsteinK D Paulsen
Aug 22, 2018·Diagnostics·Angie FasoulaJean-Gael Bernard
May 3, 2019·The Review of Scientific Instruments·Paul MeaneyKeith Paulsen
Dec 18, 2019·Sensors·Eleonora RazzicchiaPanagiotis Kosmas
Sep 12, 2018·Diagnostics·Tomas RydholmPaul M Meaney
May 8, 2020·Sensors·Jorge A Tobon VasquezFrancesca Vipiana

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