Title: Numerical examination of a new ultra-wideband dual-polarised square horn antenna for pulse radiation and the early-stage breast cancer detection

Authors: AliReza Samimi, Asghar Keshtkar, Ahmad Keshtkar

Addresses: Department of ECE, University of Tabriz, 29 Bahman Boulevard, Tabriz, Iran. ' The Faculty of Engineering and Technology, Imam Khomeini International University (IKIU), Ghazvin, Iran. ' Medical Physics Department, Medical Faculty, Tabriz University of Medical Sciences, Tabriz, Iran

Abstract: Since the backscattered cross-polarised signal can be used to detect breast tumours that are located near chest wall and determine the polarisation characteristic of tumours, which is different in benign and malignant ones, in this paper, we try to design an UWB small dual-polarised horn antenna. Effects of different elements of the antenna on its performance are examined using three dimensional finite-difference-time-domain (FDTD) methods. Instead of ridges, four curved planes terminated with resistors are incorporated with a horn body. It is shown that the antenna configuration can be set somehow, that antenna exhibits low VSWR, S21 over a wide frequency range from 1 GHz to 11 GHz and high fidelity. The time-domain electric field distribution in E-plane and H-plane and radiation pattern of the antenna are shown. Capability of antenna in producing narrow beam width for hyperthermia treatment is also explained.

Keywords: breast cancer detection; dual polarisation; finite difference time domain; FDTD; horn antenna; hyperthermia treatment; microwave imaging; ultra-wideband antennas; UWB; pulse radiation; breast tumours.

DOI: 10.1504/IJMEI.2009.022648

International Journal of Medical Engineering and Informatics, 2009 Vol.1 No.3, pp.381 - 398

Published online: 22 Jan 2009 *

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