Patent ID: 11955931
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. The power amplifier unit according to claim 11, wherein
the first impedance matching circuit includes a transmission line transformer,
the transmission line transformer includes
a first transmission line and a second transmission line disposed at different locations in a thickness direction of a substrate and connected in series, and
a third transmission line disposed between the first transmission line and the second transmission line in the thickness direction of the substrate, wherein a first end portion that is one end portion of the third transmission line is connected to one end portion of the first transmission line, and a second end portion that is the other end portion of the third transmission line is grounded, and

the first transmission line and the second transmission line are electromagnetically coupled to the third transmission line.