Patent ID: 6441703
Filing Date: 2002-08-27
Classification: H03H,Y10T

Abstract:
A radio frequency filter system, comprising:a first acoustic resonator for a first frequency; a second acoustic resonator for a disparate second frequency that is lower than said first frequency; a substrate; an acoustic reflector array coupled between the substrate and said first and second acoustic resonators; the acoustic reflector array including first and second sets of reflector layers, said first set of reflector layers is stacked on top of said second set of reflector layers and is located closer to said first and second acoustic resonators than said second set of reflector layers, and said first set of reflector layers is an acoustic quarter wavelength of the first frequency and the second set of reflector layers is an acoustic quarter wavelength of the second frequency; and said first set of reflector layers is thinner in thickness than said second set of reflector layers.