Electrostrictive resonance suppression for tunable capacitors

A mobile device for providing wireless communications, the mobile device comprising:

• one or more electronic radio frequency components including a receiver;
• and
• a multi-layer capacitor in communication with the one or more radio frequency components, wherein the multi-layer capacitor comprises:
• a plurality of dielectric layers forming tunable capacitors that are positioned over each other and that are alternately DC-biased with positive and negative DC bias, wherein a total number of the tunable capacitors is odd, wherein pairs of the plurality of dielectric layers share a common electrode and are acoustically coupled, wherein the tunable capacitors are DC-biased to generate destructive acoustic interference, wherein one of a bottom electrode of a bottom tunable capacitor or a top electrode of a top tunable capacitor is unbiased, and wherein the other of the bottom electrode of the bottom tunable capacitor or the top electrode of the top tunable capacitor is biased.

A mobile device for providing wireless communications, the mobile device comprising:

• one or more electronic radio frequency components including a receiver;
• and
• a matching network comprising a multi-layer capacitor, the matching network being connected with the one or more radio frequency components, the multi-layer capacitor comprising:
• a plurality of dielectric layers forming tunable capacitors that are positioned over each other and that are alternately DC-biased with positive and negative DC bias, wherein a total number of the tunable capacitors is odd, wherein pairs of the plurality of dielectric layers share a common electrode and are acoustically coupled, wherein the tunable capacitors are DC-biased to generate destructive acoustic interference, wherein one of a bottom electrode of a bottom tunable capacitor or a top electrode of a top tunable capacitor is unbiased, and wherein the other of the bottom electrode of the bottom tunable capacitor or the top electrode of the top tunable capacitor is biased.