A printed circuit board (PCB) module may include a PCB with at least one internal PCB element and at least one external PCB element, a shielding layer fabricated from a tunable metamaterial absorber, and a structure housing the PCB. The at least one internal PCB element may be embedded between adjacent layers of the PCB. The at least one external PCB element may be coupled to an exterior surface of the PCB. The shielding layer may be tuned in response to the at least one measurement of the EMI emission and a determination of a frequency of the EMI emission from the at least one measurement. The tuning of the shielding layer may include adjusting a plurality of fins within a plurality of elements of the metamaterial absorber to absorb at least a portion of the EMI emission.