Patent ID: 9140668
Filing Date: 2015-09-22
Classification: G01N,H03H

Abstract:
1. A device for detecting at least one substance, comprising: a carrier, a resonator applied to the carrier, the resonator having a surface facing away from the carrier, a layer for selectively or non-selectively binding with a substance to be detected formed on the surface, an acoustic mirror for decoupling acoustic waves of the resonator from the carrier arranged between the carrier and the resonator, wherein the acoustic mirror comprises a band elimination filter system having at least first and second band elimination filters connected in series, each band elimination filter comprising a layer pair including a layer having higher acoustic impedance and a layer having lower acoustic impedance, and wherein the lower acoustic impedance layer of the first band elimination filter has a different thickness than the lower acoustic impedance layer of the second band elimination filter, such that the first and second band elimination filters define two adjacent notch frequencies at which the acoustic waves of the resonator are at least partially reflected.