Show simple item record

dc.contributor.advisorArslan, Tughrul
dc.contributor.advisorThompson, John
dc.contributor.authorWang, Fengzhou
dc.date.accessioned2019-02-27T16:36:43Z
dc.date.available2019-02-27T16:36:43Z
dc.date.issued2019-07-03
dc.identifier.urihttp://hdl.handle.net/1842/35500
dc.description.abstractIn the past decades, microwave imaging techniques have attracted significant attention as an emerging, low-cost and early-stage technique for various human disease diagnoses including intracranial heart rate detection, breast and brain cancer imaging and fluid accumulation in human torso monitoring. Furthermore, microwave imaging is becoming an alternative technique for long-term breast cancer detection and real-time therapy monitoring compared to traditional medical imaging technologies such as X-ray and magnetic resonance imaging (MRI). However, it requires a low-cost and custom-made microwave hardware system. To track this issue, an ultra-wideband (UWB) antenna design together with radar techniques and additive manufacturing methods are explored in this thesis. This thesis focuses on the development of radio frequency (RF) sensing devices for both wearable and portable medical microwave imaging applications. The contribution of this thesis addresses areas such as inkjet-printed flexible antennas, mechanically driven reconfigurable artificial magnetic conductors (AMCs), soft body-coupled antennas and arrays, and a robotic-based data acquisition (DAQ) system for microwave breast imaging. In this thesis, UWB antennas are chosen, as a wideband spectrum can balance the trade-off between the imaging resolution and the penetration depth in the human body. First, the inkjet printing technique is explored and then utilised to fabricate a modified monopole UWB antenna on flexible substrates. Second, a new concept of reconfigurable AMCs using mechanical movements alone is developed to enhance the antenna performance. Third, a new stretchable spacer using a soft mixture of Ecoflex- 30 and barium titantanate (BT-BaTiO3) ceramic powder is studied and fabricated to reduce the reflection at the boundary of air and skin. By assembling the above designed inkjet-printed antenna and stretchable dielectric spacers, the resulting antennas are then further miniaturised, which allows a greater number of sensing antennas to be placed directly on the limited body surface, hence improving the microwave imaging performance. Fourth, a number of the assembled antennas are used to construct two soft antenna arrays targeting wearable imaging using delay-and-sum (DAS) beamforming. Simulations are carried out using MRI-delivered realistic breast phantoms. The reconstructed 2D imaging results demonstrate that the proposed antenna array is capable of detecting and imaging a single sphere tumour with a radius of 5 mm located in the glandular region. Finally, the experimental performance of a designed portable imaging system using the above designed soft antenna array and a modified Vivaldi antenna is evaluated for microwave breast imaging using the developed low-cost robotic-based DAQ platform. Experimental results confirm the capability of the developed devices for performing microwave tumour detection using a 3D-printed breast phantom. All the thesis contributions enable a wearable and portable RF system to support long-term healthcare applications.en
dc.language.isoenen
dc.publisherThe University of Edinburghen
dc.relation.hasversionWang, F., Wu, X. and Arslan, T., ‘Mobile-controlled portable robotic measurement setup for microwave imaging diagnoses’, in Antennas and Propagation Conference (LAPC), Loughborough, 14–15 Nov. 2016, pp. 1–5.en
dc.relation.hasversionWang, F. and Arslan, T., ‘A wearable ultra-wideband monopole antenna with a flexible artificial magnetic conductor’, in Antennas and Propagation Conference (LAPC), Loughborough, 14–15 Nov. 2016, pp. 1–5.en
dc.relation.hasversionWang, F. and Arslan, T., ‘Inkjet-printed antenna on the flexible substrate for wearable microwave imaging applications’, in Antennas and Propagation Conference (LAPC), Loughborough, 14–15 Nov. 2016, pp. 1–4.en
dc.relation.hasversionWang, F. and Arslan, T., ‘A thin-film-based wearable antenna array for breast microwave imaging and diagnosis’, in IEEE MTT-S International Microwave Bio Conference (IMBOIC 2017), Gothenburg, 15–17 May 2017, pp. 1–4.en
dc.relation.hasversionWang, F. and Arslan, T., ‘Body-coupled monopole UWB antenna for wearable medical microwave imaging applications’, in Antennas and Propagation in Wireless Communications (APWC), IEEE-APS Topical Conference on, Verona, 11–15 Sept. 2017, pp. 1–4.en
dc.relation.hasversionWang, F. and Arslan, T., ‘Microfluidic frequency tuneable three-dimensional (3D) printed antenna’, in Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2017 IEEE MTT-S International Microwave Workshop Series on, Pavia, 20–22 Sept. 2017.en
dc.relation.hasversionWang, F. and Arslan, T., ‘Assembly of conformal antenna array for wearable microwave breast imaging applications’, in Antennas and Propagation Conference (LAPC), Loughborough, 13–14 Nov. 2017, pp. 1–4.en
dc.relation.hasversionWang, F. and Arslan, T., ‘Breast cancer detection by microwave imaging system using wearable conformal antenna array’, in IEEE International Conference on Imaging Systems and Techniques (IST), Beijing, 18–20 Oct. 2017.en
dc.relation.hasversionHou, Y., Wang, F. and Arslan, T., ‘Indoor localization for Bluetooth low energy devices using weighted off-set triangulation algorithm’, in 29th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+), Portland, OR, 12–16 Sept. 2016, pp. 2286–2292.en
dc.relation.hasversionJuri, A., Wang, F. and Arslan, T., ‘Obstruction-aware Bluetooth low-energy indoor positioning’, in 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+), Portland, OR, 12–16 Sept. 2016, pp. 2254–2261.en
dc.relation.hasversionWang, G., Liu, D., Wang, F., and Arslan, T., ‘A tiny and multifunctional ICAP controller for dynamic partial reconfiguration system’, in Adaptive Hardware and Systems (AHS), 2017 NASA/ESA Conference on, Pasadena, CA, 24–27 Jul. 2017, pp. 71–76.en
dc.relation.hasversionWang, G., Liu, S., Nie, J., Wang, F., and Arslan, T., ‘An online task placement algorithm based on maximum empty rectangles in dynamic partial reconfigurable systems’, in Adaptive Hardware and Systems (AHS), 2017 NASA/ESA Conference on, Pasadena, CA, 2017, pp. 180–185.en
dc.subjectrelative dielectric characteristicsen
dc.subjectmicrowave spectrum signalsen
dc.subjectbreast imagingen
dc.subjectmicrowave imaging algorithmsen
dc.subjectnovel radio frequency sensing devicesen
dc.subjectearly stage-detectionen
dc.subjectwearable sensing systemen
dc.subjectinternet-of-thingsen
dc.subjectonline healthcare monitoring applicationsen
dc.titleWearable and portable radio frequency devices for medical microwave imagingen
dc.typeThesis or Dissertationen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen
dc.rights.embargodate2021-07-03en
dcterms.accessRightsRestricted Accessen


Files in this item

This item appears in the following Collection(s)

Show simple item record