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Microwave Imaging Sensor Using Low Profile Modified Stacked Type Planar Inverted F Antenna

Centre of Advanced Electronic and Communication Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia
Laboratory of Spacecraft Environment Interaction Engineering (LaSEINE), Kyushu Institute of Technology, Fukuoka 804-8550, Japan
Authors to whom correspondence should be addressed.
Sensors 2018, 18(9), 2949;
Received: 9 May 2018 / Revised: 14 July 2018 / Accepted: 17 July 2018 / Published: 5 September 2018
(This article belongs to the Special Issue Antenna Technologies for Microwave Sensors)
PDF [6125 KB, uploaded 5 September 2018]


Microwave imaging is the technique to identify hidden objects from structures using electromagnetic waves that can be applied in medical diagnosis. The change of dielectric property can be detected using microwave antenna sensor, which can lead to localization of abnormality in the human body. This paper presents a stacked type modified Planar Inverted F Antenna (PIFA) as microwave imaging sensor. Design and performance analysis of the sensor antenna along with computational and experimental analysis to identify concealed object has been investigated in this study. The dimension of the modified PIFA radiating patch is 40 × 20 × 10 mm3. The reflector walls used, are 45 mm in length and 0.2-mm-thick inexpensive copper sheet is considered for the simulation and fabrication which addresses the problems of high expenses in conventional patch antenna. The proposed antenna sensor operates at 1.55–1.68 GHz where the maximum realized gain is 4.5 dB with consistent unidirectional radiation characteristics. The proposed sensor antenna is used to identify tumor in a computational human tissue phantom based on reflection and transmission coefficient. Finally, an experiment has been performed to verify the antenna’s potentiality of detecting abnormality in realistic breast phantom. View Full-Text
Keywords: PIFA; antenna; sensor; microwave imaging; SAR; unidirectional; design PIFA; antenna; sensor; microwave imaging; SAR; unidirectional; design

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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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Islam, M.T.; Ullah, M.A.; Alam, T.; Singh, M.J.; Cho, M. Microwave Imaging Sensor Using Low Profile Modified Stacked Type Planar Inverted F Antenna. Sensors 2018, 18, 2949.

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