Existing pressure sensing fabrics may involve two portions, i. The distortion compensation circuit has a subtractor, a function generator, and a weighting circuit. The output of the control circuit is coupled to the gate electrode of a high current MOSFET device. These cavities may advantageously provide the impedance matching and may be readily formed during manufacturing of the insulator member, such as by molding, for example. Then, the measurements are combined, and the combinations of antennas are ranked based upon the combined measurement.