Bulk acoustic wave resonator filters including rejection-band resonators

A Bulk Acoustic Wave (BAW) resonator filter comprising:

• a BAW resonator pass-band filter circuit, the BAW resonator pass-band filter circuit configured to pass frequency components of an input signal in a pass-band of frequencies received at an input port of the BAW resonator pass-band filter circuit to an output port of the BAW resonator pass-band filter circuit;
• a first rejection-band shunt resonator coupled in parallel across an input port of the BAW resonator pass-band filter circuit and a reference node of the BAW resonator pass-band filter circuit, the first rejection-band shunt resonator having a first resonant frequency peak in a rejection-band, of frequencies that is greater than the pass-band of frequencies;
• and
• a second rejection-band shunt resonator coupled in parallel between the output port of the BAW resonator filter and the reference node, the second rejection-band :shunt resonator having a second resonant frequency peak in the rejection-band of frequencies.

A Bulk Acoustic Wave (BAW) resonator filter comprising:

• a first BAW resonator pass-band filter circuit configured to pass frequency components of an input signal of the BAW resonator filter in a first pass-band of frequencies received at an input port of the first BAW resonator pass-band filter circuit to an output port of the first BAW resonator pass-band filter circuit;
• a first rejection-band series resonator coupled in series with the input port of the first BAW resonator pass-band filter circuit or the output port of the first BAW resonator pass-band filter circuit, the first rejection-band series resonator having ,a first anti-resonant frequency peak in a first rejection-band of frequencies that is less than the first pass-band of frequencies;
• a second BAW resonator pass-band filter circuit configured to pass frequency components of the input signal in a second pass-band of frequencies received at an input port of the second BAW resonator pass-band filter circuit to an output port of the second BAW resonator pass-band filter circuit;
• a first rejection-band shunt resonator coupled in parallel across the input port of the second BAW resonator pass-band filter circuit and a reference node of the second BAW resonator pass-band filter circuit or coupled in parallel across the output port of the second BAW resonator pass-band filter circuit and the reference node of the second BAW resonator pass-band filter circuit, the first rejection-band shunt resonator having a first resonant frequency peak in a second rejection-band of frequencies that is greater than the second pass-band of frequencies;
• and
• a switch configured to couple the input signal to the input port of the first BAW resonator pass-band filter circuit and to couple the output port of the first BAW resonator pass-band filter circuit to an output signal of the BAW resonator filter in a first state, and configured to couple the input, signal to the input port of the second BAW resonator pass-band filter circuit and to couple the output port of the second BAW resonator pass-band filter circuit to the output signal of the BAW resonator filter in a second state.