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Materials 2015, 8(8), 4631-4651; doi:10.3390/ma8084631

Microwave Imaging Sensor Using Compact Metamaterial UWB Antenna with a High Correlation Factor

1
Space Science Centre (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor D. E. 43600, Malaysia
2
Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor D. E. 43600, Malaysia
3
Center for Artificial Intelligence Technology, Faculty of Information Science & Technology, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor D. E. 43600, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Steven L. Suib
Received: 14 May 2015 / Revised: 2 July 2015 / Accepted: 7 July 2015 / Published: 23 July 2015
View Full-Text   |   Download PDF [4096 KB, uploaded 23 July 2015]   |  

Abstract

The design of a compact metamaterial ultra-wideband (UWB) antenna with a goal towards application in microwave imaging systems for detecting unwanted cells in human tissue, such as in cases of breast cancer, heart failure and brain stroke detection is proposed. This proposed UWB antenna is made of four metamaterial unit cells, where each cell is an integration of a modified split ring resonator (SRR), capacitive loaded strip (CLS) and wire, to attain a design layout that simultaneously exhibits both a negative magnetic permeability and a negative electrical permittivity. This design results in an astonishing negative refractive index that enables amplification of the radiated power of this reported antenna, and therefore, high antenna performance. A low-cost FR4 substrate material is used to design and print this reported antenna, and has the following characteristics: thickness of 1.6 mm, relative permeability of one, relative permittivity of 4.60 and loss tangent of 0.02. The overall antenna size is 19.36 mm × 27.72 mm × 1.6 mm where the electrical dimension is 0.20 λ × 0.28 λ × 0.016 λ at the 3.05 GHz lower frequency band. Voltage Standing Wave Ratio (VSWR) measurements have illustrated that this antenna exhibits an impedance bandwidth from 3.05 GHz to more than 15 GHz for VSWR < 2 with an average gain of 4.38 dBi throughout the operating frequency band. The simulations (both HFSS and computer simulation technology (CST)) and the measurements are in high agreement. A high correlation factor and the capability of detecting tumour simulants confirm that this reported UWB antenna can be used as an imaging sensor. View Full-Text
Keywords: breast cancer; correlation factor; metamaterial; ultra-wideband breast cancer; correlation factor; metamaterial; ultra-wideband
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. (CC BY 4.0).

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MDPI and ACS Style

Islam, M.M.; Islam, M.T.; Faruque, M.R.I.; Samsuzzaman, M.; Misran, N.; Arshad, H. Microwave Imaging Sensor Using Compact Metamaterial UWB Antenna with a High Correlation Factor. Materials 2015, 8, 4631-4651.

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