Hello,

In CST Studio Suite, Characteristic Mode Analysis (CMA) is a tool built into the Integral Equation Solver and Multilayer Solver, allowing you to calculate a set of orthogonal current modes supported on a conducting surface, providing insights into the radiating properties of structures and aiding antenna design.

https://space.mit.edu/RADIO/CST_online/mergedProjects/3D/common_overview/common_overview_characteristic_mode_analysis_overview.htm

https://www.linkedin.com/pulse/characteristic-mode-analysis-cma-using-cst-mws-ahsan-ali/

Thanks

Characteristic Mode Analysis (CMA) by using multilayer solver i get the MS,CA and Eigen Value, In CMA analysis farfield no back radiation and getting

MEC and MWC. and after giving port exciation also nor getting s11, farfield.