Patent ID: 11929733
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A matrix filter multiplexer, comprising:
first and second receive matrix filters coupled between first and second receive ports and an antenna port; and
first and second transmit matrix filters coupled between the antenna port and first and second transmit ports,
wherein:
an impedance at the first and second receive ports is matched to an input impedance of a low noise amplifier,
an impedance at the first and second transmit ports is matched to an output impedance of a power amplifier, and
an impedance at the antenna port is matched to an impedance of an antenna, and

wherein the first and second receive matrix filters and the first and second transmit matrix filters each include two or more sub-filters the each comprise a ladder circuit with a plurality of transversely-excited film bulk acoustic resonator (XBAR) series elements and a plurality of capacitor shunt elements that are each connected between ground and a node between a respective pair of XBAR series elements.