Channel Equalization Techniques for Capacitive Proximity Communication

Capacitive couplers used in proximity communication suffer from large insertion loss due to the parasitic capacitances in the channel path. This paper proposes two active equalization techniques that reduce channel losses by 10 and 15 dB respectively when using a 3 by 1.5 mm coupler at a gap distance of 0.5 mm. The reduced loss allows for better bit-errorrate (BER), lower power, smaller coupler size or a combination of these, potentially expanding on the applications for proximity communication.