Electrical breakdown protection for a capacitive wireless powering system

A capacitive powering system, comprising:

• a pair of receiver electrodes connected to a load through an inductor, wherein the inductor is coupled to the load to resonate the system;
• a pair of transmitter electrodes connected to a driver;
• and an insulating layer including a non-conductive layer made of a first type of non-conductive material, and a protection layer made of a second type of non-conductive material, wherein a breakdown voltage of the second type of non-conductive material is higher than a breakdown voltage of the first type of non-conductive material, the protection layer covers a portion of the non-conductive layer, wherein the pair of transmitter electrodes and the pair of receiver electrodes are located on opposite sides of the insulating layer, such that a capacitive impedance is formed between the pair of transmitter electrodes and the pair of receiver electrodes and the protection layer electrically insulates the pair of transmitter electrodes from the pair of receiver electrodes, wherein a power signal generated by the driver is wirelessly transferred from the pair of transmitter electrodes to the pair of receiver electrodes without causing electrical breakdowns in the system when a frequency of the power signal matches a series-resonance frequency of the first inductor and the capacitive impedance.