S-band five-port ring reflectometer for synthetic breast tissues dielectric determination

Lee, Chia Yew

S-band five-port ring reflectometer for synthetic breast tissues dielectric determination

dc.contributor.author	Lee, Chia Yew
dc.date.accessioned	2023-08-21T06:34:32Z
dc.date.available	2023-08-21T06:34:32Z
dc.date.issued	2017
dc.description	Thesis (PhD. (Biomedical Engineering))
dc.description.abstract	Vector Network Analyzer (VNA) is usually used in microwave breast tumour detection. However, there is still lack of research about the application of Six-port Reflectometer (SPR) in microwave breast tumour detection. Firstly, a SPR with dielectric probe sensor was used to predict relative dielectric, er of normal and tumorous breast tissue in frequency range from 2.34 GHz to 3.0 GHz. Secondly, the enhanced superstrate for Five-port Ring Circuit (FPRC) is capable of improving its operating bandwidth and shifting the operating centre frequency to a lower value without increasing circuit physical size. Then, the enhanced superstrate FPRC was integrated into the SPR and calibrated using the well-known three-standard calibrations. The calibrated measurement-port was connected to the coaxial probe. Next, the aperture probe was immersed in the synthetic breast tissue samples. The synthetic samples are the Triton TX100-water mixture at different ratio that mimics dielectric and conductivity of normal and tumour breast tissue samples. The comparative studies of magnitude, phase, dielectric constant and loss factor of the synthetic mixture samples were conducted using study SPR-coaxial probe system and commercial VNA with Agilent 85070E dielectric probe. Maximum mean error of the linear magnitude, phase, dielectric and loss factor measurements was recorded to be 0.02, 6.1°, 2.21 and 1.60, respectively. The enhanced superstrate for FPRC improved the operating bandwidth up to 26%. The reflection and dielectric measurement results from both system demonstrates good agreement. Those measurements are significantly distinguishable for different ratios of the synthetic mixture samples
dc.description.sponsorship	Faculty of Biosciences and Medical Engineering
dc.identifier.citation	NA
dc.identifier.issn	NA
dc.identifier.uri	http://openscience.utm.my/handle/123456789/630
dc.language.iso	en
dc.publisher	Universiti Teknologi Malaysia
dc.relation.ispartofseries	NA; NA
dc.subject	Tumors—Diagnosis
dc.subject	Breast—Tumors
dc.title	S-band five-port ring reflectometer for synthetic breast tissues dielectric determination
dc.type	Thesis
dc.type	Dataset