Seminars

Date: March 13, 10:00–11:00

Venue: Zoom Meeting

Speaker: Prof. Won-Kwang Park (Kookmin University)

Title: Real-Time identification of small dielectric objects from two-dimensional Fresnel experimental dataset

Abstract: We consider an inverse scattering problem for the real-time localization of unknown scatterers from measured scattered-field data. In most studies, all elements of the so-called multi-static response (MSR) matrix, whose entries correspond to the measured scattered fields, must be collected to design an appropriate indicator function. However, in various experimental setups, such as the Fresnel experimental facility or microwave imaging systems at ETRI, some elements cannot be measured. Motivated by this limitation, we consider the inversion of Fresnel experimental dataset to retrieve the existence, location, outline shape of small dielectric scatterers. In order to show the applicability and limitation, we demonstrate that the imaging function can be expressed in terms of the material properties of the objects, an infinite series of integer-order Bessel functions, and the configuration of the transmitting and receiving antennas. We further investigate the quantitative relationship between imaging performance and the sparsity of the MSR matrix. Numerical simulations using the 2D Fresnel dataset are conducted to validate our theoretical results.

Date: May 1, 10:00–11:00

Venue: Zoom Meeting

Speaker: Prof. Sunghwan Moon, (Kyungpook National University)

Title: TBA

Abstract: TBA