Abstract
Integrated Sensing and Communication (ISAC) is one of six usage scenarios defined in ITU-R IMT-2030 framework for 6G. To enable this scenario, standardization bodies such as ETSI, ATIS, and 3GPP have been actively developing the ISAC channel model. The existing approaches however have limitations in terms of accurately capturing all radio signal interactions with various components of the ISAC channel. In this paper, we present a novel electromagnetic (EM) based approach for modeling mutually-coupled radar cross-sections (RCSs) of multiple scattering points that can be representative of single or multiple targets. Our results demonstrate the accuracy of estimating multi-scattering point RCS, particularly relevant to sensing operation in higher frequency ranges.