We can clearly see in page $6$ of Pozar's Microwave Engineering Faraday's law written under this form
$$\nabla \times \bar{\mathcal{E}}= \frac{\partial \bar{\mathcal{B}}}{\partial t}-\bar{\mathcal{M}}$$ $\bar{\mathcal{E}}$ is the electric field, in volts per meter (V/m).
$\bar{\mathcal{B}}$ is the magnetic flux density, in webers per meter squared (Wb/m²).
$\bar{\mathcal{M}}$ is the (fictitious) magnetic current density, in volts per meter (V/m²).
I can't find in any other reference (Jackson, Griffiths,...) a form of Faraday's law in which $\bar{\mathcal{M}}$ appears. Is the form above simply a mistake?