How good is the impedance boundary condition?

Application of the spectral acceleration forward-backward method for propagation over terrain

“…If an IBC is valid, the surface may be treated using a single surface integral equation. Detailed information about impedance boundary condition can be found in [34]- [37].…”

Impulsive Radiation From a Vertical Electric Dipole Above an Imperfectly Conducting Surface

“…The approximating representation of conducting bodies via the surface impedance boundary condition (IBC), e.g. [3] [4], [5], [6], is convenient to avoid a costly fine discretization strategy in unstructured mesh grid modelling methods, such as the finite-element method [7]. Similar holds for the FDTD method [8], which in conjunction with the IBC, e.g.…”

Impulsive Radiation From a Horizontal Electric Dipole Above an Imperfectly Conducting Surface

“…The approximating representation of conducting bodies via the surface impedance boundary condition (IBC), e.g. [3], [4], [5], [6], is convenient to avoid a costly fine discretization in unstructured mesh grid modelling methods, such as the finite-element method, e.g. [7].…”