Antenna arrays which can work simultaneously in various frequency bands thanks to the physical disposition of the elements which constitute them, and also the multiband behaviour of some elements situated strategically in the array. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The fiber-enriched regions have a local basis weight and papermaking fibers that are oriented in the CD of the sheet. The subcircuit selection is responsive to the determined respective indicia of power consumption by the first subcircuit and by the second subcircuit.