A Practical UWB Microwave Imaging System Using Time-Domain DORT for Tumor Detection

In this paper Time Reversal (TR) and Decomposition of Time Reversal operator (DORT) methods are employed in an Ultra-WideBand (UWB) microwave imaging system. The possibility of multiple tumor detection in using selective focusing DORT is investigated and a number of improvements are proposed in DORT algorithm. A practical UWB imaging system for tumor-like object detection consisting of just two revolving UWB antennas is then introduced. The proposed system does not need costly switches or network analyzers as it just uses a UWB transceiver to acquire the required time domain signals. Challenging problems of this system are addressed and their solutions are proposed and vindicated through both simulations and measurements carried out on a simple model by using an experimental setup. The proposed system is suitable for different applications such as breast cancer and tumor detection where high accuracy and resolution is necessary.