Patent ID: 8365373
Filing Date: 2013-02-05
Classification: H03H,Y10T

Abstract:
1. A method for generating piezoelectric properties in an agile tunable solidly-mounted resonator, comprising the steps of: forming a piezoelectric resonator; configuring said piezoelectric resonator with a bonded face, a given amount of acoustic energy and a given Q; selecting a plurality of piezoelectric low mechanical impedance materials and a plurality of piezoelectric high mechanical impedance materials; forming a plurality of piezoelectric layers of low mechanical impedance material; forming a plurality of piezoelectric layers of high mechanical impedance material; interleaving said plurality of piezoelectric layers of low mechanical impedance material and said plurality of piezoelectric layers of high mechanical impedance material into a plurality of alternating piezoelectric bi-layers of low impedance material and high impedance material with a plurality of piezoelectric characteristics; stacking said piezoelectric resonator on a first one of said plurality of bi-layers; forming a substrate; stacking said plurality of bi-layers on said substrate; connecting at least one of said plurality of bi-layers to an adaptive circuit that alternates with an external electrical impedance; generating an amount of electrical energy between an open circuit and a short circuit; providing said plurality of bi-layers with a plurality of coherent internal reflections; exposing said bonded face to a low acoustic impedance; preventing said bonded face from radiating said given amount of acoustic energy down into said plurality of bi-layers and into said substrate because said given amount of acoustic energy is reflected back to said resonator due to said plurality of coherent internal reflections; and preserving said given Q, preventing an unwanted leakage and an unwanted frequency shift and allowing said resonator to be tunable.