Numerical Assessment of a Cognitive Chamber: TMz Case

A numerical analysis based on the Method of Mo-ments is conducted to study the feasibility of absorbing chambers made of arrays of metallic elements, named here as cognitive chambers. The array is covering the inner surface of a perfectly conducting cylindrical shield. The analysis is so far limited to the
$\text{TM}^{z}$
case. Very low perturbation of the field from a device under test, represented by a collection of axial dipoles is observed. The non-disturbance of the incident fields correlates well with a criterion based on the active impedance. A significant dependence of the optimal load impedance versus azimuthal and axial modes has been observed.