Direct sampling method for imaging small anomalies: real-data experiments
This work provides a real-time detection method for small anomalies in electromagnetic imaging, but the results are incremental as it extends existing DSM theory to practical antenna setups.
The paper designs a direct sampling method (DSM) for real-time detection of small anomalies using scattering parameters from a few dipole antennas, proving its indicator function theoretically and demonstrating effectiveness and limitations with real-data experiments.
A direct sampling method (DSM) is designed herein for a real-time detection of small anomalies from scattering parameters measured by a small number of dipole antennas. Applicability of the DSM is theoretically demonstrated by proving that its indicator function can be represented in terms of an infinite series of Bessel functions of integer order and the antenna locations. Experiments using real-data then demonstrate both the effectiveness and limitations of this method.