Multilayer circuit with variable inductor, and method of manufacturing it

The multilayer circuit comprising a plurality of electrically conductive layers (1, 2, 3, 4, n) separated from each other by respective dielectric layers (11, 12, 13, 14), wherein at least one variable inductor (100) is provided that comprises a conductive coil structure (20, 20A, 20B) following a coil path in one of said conductive layers, two ports (30, 31) connected to said coil structure (20, 20A, 20B), and a switch arrangement comprising at least one switch (40) for selectively connecting at least one of said ports (30) to one of a plurality of specific positions (P) of said coil structure along said coil path in said one of said conductive layers, thus providing for a corresponding selective inductance value of the variable inductor, between said two ports (30, 31). The invention also relates to a method of manufacturing the circuit.