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EBG Based Microstrip Patch Antenna for Brain Tumor Detection via Scattering Parameters in Microwave Imaging System
Reefat Inum1, Md Masud Rana1, Kamrun Nahar Shushama1
1Department of Electrical and Electronic Engineering, Rajshahi University of Engineering and Technology, Rajshahi, Bangladesh.
International Journal of Biomedical Imaging
|April 7, 2018
Summary
This study introduces a novel microwave brain imaging system using an enhanced microstrip patch antenna with electromagnetic band gap (EBG) structures for improved tumor detection. The system achieves high-resolution imaging, ensuring safety with specific absorption rate (SAR) analysis.
Area of Science:
- Biomedical Engineering
- Electromagnetics
- Medical Imaging
Background:
- Brain tumor detection remains a challenge, necessitating advanced imaging techniques.
- Microwave imaging offers a non-ionizing alternative for visualizing subsurface structures.
- Antenna performance is critical for signal transmission and reception in microwave imaging systems.
Purpose of the Study:
- To develop and validate a microwave brain imaging system for detecting and visualizing brain tumors.
- To investigate the performance enhancement of a microstrip patch antenna using electromagnetic band gap (EBG) structures.
- To assess the safety of the proposed imaging system through specific absorption rate (SAR) analysis.
Main Methods:
- A microstrip patch antenna with integrated rectangular and circular EBG structures was designed and simulated.
- Antenna performance metrics (return loss, impedance bandwidth, gain) were evaluated.
- A monostatic radar-based confocal microwave imaging algorithm was applied using simulated S-parameter data.
- Specific absorption rate (SAR) was calculated and compared against safety standards.
Main Results:
- The circular EBG structure significantly improved antenna performance, enhancing return loss by 22.77%, impedance bandwidth by 5.84%, and gain by 16.53% compared to the rectangular EBG.
- Simulation results from CST and HFSS were validated.
- The imaging algorithm successfully generated a high-resolution image of a simulated tumor in a six-layer human head phantom.
- Calculated SAR values were within established safety limits.
Conclusions:
- The proposed microwave brain imaging system, utilizing a circular EBG-enhanced patch antenna, demonstrates high potential for accurate and safe brain tumor detection.
- The integration of EBG structures offers a viable method for optimizing antenna performance in microwave imaging applications.
- The study validates the efficacy of the developed imaging algorithm and confirms the system's safety compliance.
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