Patent ID: 6917261

Claim:
A component operating with bulk acoustic waves, comprising: an asymmetric first port which has a signal-carrying connection; a symmetrical second port with a first and a second connection; a first resonator having a first electrode, a second electrode and a first piezoelectric layer that is arranged between the first and the second electrode, the first resonator being connected to the signal-carrying connection of the first port and being connected to a reference ground potential; an at least partially permeable coupling layer system having an alternating sequence of at least two λ/4 mirror layers with a different acoustic impedance and a compensation layer which has a thickness of λ/8; a second resonator that is stacked one on top of the first resonator and is acoustically coupled to the first resonator via the coupling layer system, the second resonator having a third electrode, a fourth electrode and a second piezoelectric layer which is arranged between the third and the fourth electrode, the second resonator being connected between the first and the second connection of the second port.