# US 11,451,198 B2 · Multi-band power amplifier module

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- Number: US 11,451,198 B2
- Document ID: US11451198B2
- Status: Granted
- Kind: B2
- Application number: 16/796,197
- Filed: 2020-02-20
- Published: 2020-06-18
- Granted: 2022-09-20
- Earliest claimed: 2017-05-16
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Syunji Yoshimi
- Web page: https://patentgrep.com/patent/US11451198B2

## CPC

- H03F 3/211: {using a combination of several amplifiers (H03F3/60 takes precedence)}
- H03F 1/0211: {with control of the supply voltage or current}
- H03F 3/19: with semiconductor devices only
- H03F 3/195: in integrated circuits
- H03F 3/245: {with semiconductor devices only}
- H03F 3/68: Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics {(power amplifiers using a combination of several semiconductor amplifiers H03F3/211; combinations of amplifiers using coupling networks with distributed constants H03F3/602)}
- H03F 3/72: Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H04B 1/04: Circuits
- H04B 1/0483: {Transmitters with multiple parallel paths}
- H03F 2200/111: the amplifier being a dual or triple band amplifier, e.g. 900 and 1800 MHz, e.g. switched or not switched, simultaneously or not
- H03F 2200/171: A filter circuit coupled to the output of an amplifier
- H03F 2200/231: the input of an amplifier can be switched on or off by a switch to amplify or not an input signal
- H03F 2200/294: the amplifier being a low noise amplifier [LNA]
- H03F 2200/387: A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier
- H03F 2200/39: Different band amplifiers are coupled in parallel to broadband the whole amplifying circuit
- H03F 2200/414: A switch being coupled in the output circuit of an amplifier to switch the output on/off
- H03F 2200/429: Two or more amplifiers or one amplifier with filters for different frequency bands are coupled in parallel at the input or output
- H03F 2200/451: the amplifier being a radio frequency amplifier
- H03F 2203/21109: An input signal being distributed by switching to a plurality of paralleled power amplifiers
- H03F 2203/21139: An impedance adaptation circuit being added at the output of a power amplifier stage
- H03F 2203/21157: A filter circuit being added at the output of a power amplifier stage
- H03F 2203/21175: An output signal of a power amplifier being on/off switched
- H03F 2203/7209: the gated amplifier being switched from a first band to a second band
- H03F 2203/7215: the gated amplifier being switched on or off by a switch at the input of the amplifier
- H03F 2203/7221: the gated amplifier being switched on or off by a switch at the output of the amplifier
- H03F 2203/7236: the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
- H04B 1/16: Circuits
- H04B 2001/0408: {with power amplifiers}
- H03F: AMPLIFIERS
- H04B: TRANSMISSION

## Abstract

A multi-band power amplifier module includes at least one transmission input terminal, at least one power amplifier circuit that receives a first transmission signal and a second transmission signal through the at least one transmission input terminal, a first filter circuit that allows the first transmission signal to pass therethrough, a second filter circuit that allows the second transmission signal to pass therethrough, at least one transmission output terminal through which the first and second transmission signals output from the first and second filter circuits are output, a transmission output switch that outputs each of the first and second transmission signals output from the at least one power amplifier circuit to the first filter circuit or the second filter circuit, and a first tuning circuit that adjusts impedance matching between the at least one power amplifier circuit and the at least one transmission output terminal.

## Claims

### Claim 1

A multi-band low-noise amplifier module comprising:
a plurality of low-noise amplifier circuits;
a reception input switch that has a plurality of input terminals respectively connected to a plurality of filter circuits and a plurality of output terminals respectively connected to the plurality of low-noise amplifier circuits, the reception input switch being configured to selectively connect each of the plurality of low-noise amplifier circuits to a corresponding one of the plurality of filter circuits such that a first received signal output from a first of the plurality of filter circuits and a second received signal output from a second of the plurality of filter circuits are each transmitted to a corresponding one of the plurality of low-noise amplifier circuits; and
a tuning circuit that adjusts impedance matchings between the first and second filter circuits and the plurality of low-noise amplifier circuits,
wherein the tuning circuit is connected between the reception input switch and the plurality of low-noise amplifier circuits.

### Claim 2 (depends on 1)

The multi-band low-noise amplifier module according to claim 1, further comprising:
at least one reception output terminal through which the first received signal and the second received signal amplified by the plurality of low-noise amplifier circuits are output.

### Claim 3

A multi-band low-noise amplifier module comprising:
a plurality of low-noise amplifier circuits;
a reception input switch that has a plurality of input terminals respectively connected to a plurality of filter circuits and a plurality of output terminals respectively connected to the plurality of low-noise amplifier circuits, the reception input switch being configured to selectively connect each of the plurality of low-noise amplifier circuits to a corresponding one of the plurality of filter circuits such that a first received signal output from a first of the plurality of filter circuits and a second received signal output from a second of the plurality of filter circuits are respectively transmitted to a single one of the plurality of low-noise amplifier circuits; and
a tuning circuit that adjusts impedance matching between the first and second filter circuits and the plurality of low-noise amplifier circuits,
wherein the tuning circuit is connected between the reception input switch and the plurality of low-noise amplifier circuits, and
wherein the first received signal and the second received signal are in an identical frequency range.

### Claim 4

A multi-band low-noise amplifier module comprising:
a plurality of low-noise amplifier circuits;
a reception input switch that has a plurality of input terminals respectively connected to a plurality of filter circuits and a plurality of output terminals respectively connected to the plurality of low-noise amplifier circuits, the reception input switch being configured to selectively connect each of the plurality of low-noise amplifier circuits to a corresponding different one of the plurality of filter circuits such that a first received signal output from a first of the plurality of filter circuits and a second received signal output from a second of the plurality of filter circuits are respectively transmitted to different ones of the plurality of low-noise amplifier circuits; and
a tuning circuit that adjusts impedance matchings between the first and second filter circuits and the plurality of low-noise amplifier circuits,
wherein the tuning circuit is connected between the reception input switch and the plurality of low-noise amplifier circuits, and
wherein the first received signal and the second received signal are in different frequency ranges.

### Claim 5

A multi-band power amplifier module comprising:
at least one transmission input terminal;
at least one power amplifier circuit that receives a first transmission signal and a second transmission signal through the at least one transmission input terminal;
a first filter circuit that passes the first transmission signal;
a second filter circuit that passes the second transmission signal;
at least one transmission output terminal through which the first transmission signal and the second transmission signal from the first and second filter circuits are output;
a transmission output switch that selectively transmits each of the first transmission signal and the second transmission signal output from the at least one power amplifier circuit to the respective first and second filter circuits;
a first tuning circuit that adjusts impedance matching between the at least one power amplifier circuit and the at least one transmission output terminal;
at least one low-noise amplifier circuit;
a reception input switch that selectively transmits each of a first received signal output from a first filter circuit and a second received signal output from a second filter circuit to the at least one low-noise amplifier circuit; and
a second tuning circuit that adjusts impedance matching between the first and second filter circuits and the at least one low-noise amplifier circuit,
wherein the second tuning circuit is connected between the reception input switch and the at least one low-noise amplifier circuit.

### Claim 6 (depends on 5)

The multi-band power amplifier module according to claim 5, further comprising:
a transmission input switch that transmits each of the first transmission signal and the second transmission signal input through the at least one transmission input terminal to the at least one power amplifier circuit.

### Claim 7 (depends on 5)

The multi-band power amplifier module according to claim 5, wherein:
the at least one power amplifier circuit comprises a first power amplifier circuit configured to amplify both the first transmission signal and the second transmission signal, and
the transmission output switch simultaneously selects a first path configured to transmit the first transmission signal from the first power amplifier circuit to the first filter circuit and a second path configured to transmit the second transmission signal from the first power amplifier circuit to the second filter circuit.

### Claim 8 (depends on 7)

The multi-band power amplifier module according to claim 7, wherein the first tuning circuit adjusts impedances in accordance with a change in impedance matching state associated with the transmission output switch selecting between the first path and both the first path and the second path.

### Claim 9 (depends on 5)

The multi-band power amplifier module according to claim 5, wherein the first tuning circuit is connected between the transmission output switch and the first and second filter circuits.

### Claim 10 (depends on 5)

The multi-band power amplifier module according to claim 5, wherein the first transmission signal and the second transmission signal are in an identical frequency range.

### Claim 11 (depends on 6)

The multi-band power amplifier module according to claim 6, wherein the transmission input switch selectively transmits each of the first transmission signal and the second transmission signal to a single one of the at least one power amplifier circuit.

### Claim 12 (depends on 6)

The multi-band power amplifier module according to claim 6, wherein the transmission input switch selectively transmits each of the first transmission signal and the second transmission signal to a single one of the at least one power amplifier circuit when the first transmission signal and the second transmission signal are in an identical frequency range.

### Claim 13 (depends on 5)

The multi-band power amplifier module according to claim 5, wherein the first transmission signal and the second transmission signal are in different frequency ranges.

### Claim 14 (depends on 6)

The multi-band power amplifier module according to claim 6, wherein the transmission input switch selectively transmits each of the first transmission signal and the second transmission signal to a different power amplifier circuit of the at least one power amplifier circuit.

### Claim 15 (depends on 6)

The multi-band power amplifier module according to claim 6, wherein the transmission input switch selectively transmits each of the first transmission signal and the second transmission signal to a different power amplifier circuit of the at least one power amplifier circuit when the first transmission signal and the second transmission signal are in different frequency ranges.

### Claim 16 (depends on 5)

The multi-band power amplifier module according to claim 5, further comprising an antenna switch that selectively connects the first filter circuit and the second filter circuit to the at least one transmission output terminal.

### Claim 17 (depends on 6)

The multi-band power amplifier module according to claim 6, wherein the first tuning circuit is connected between the transmission output switch and the first and second filter circuits.