# US 2021/0242839 A1 · Multi-chip module of radio frequency power amplifier

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- Number: US 2021/0242839 A1
- Document ID: US20210242839A1
- Status: Published application
- Kind: A1
- Application number: 16/972,565
- Filed: 2019-07-09
- Published: 2021-08-05
- Earliest claimed: 2018-07-10
- Assignees: Innogration (Suzhou) Co., Ltd.
- Applicants: Innogration (Suzhou) Co., Ltd.
- Inventors: Yong ZHANG; Yinghao ZHUO; Gordon Chiang MA
- Web page: https://patentgrep.com/patent/US20210242839A1

## CPC

- H03F 3/195: in integrated circuits
- H03F 1/56: Modifications of input or output impedances, not otherwise provided for
- H03F 3/245: {with semiconductor devices only}
- H03F 3/60: Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators (H03F3/54 takes precedence)
- H03F 2200/222: A circuit being added at the input of an amplifier to adapt the input impedance of the amplifier
- H03F 2200/451: the amplifier being a radio frequency amplifier
- H03F: AMPLIFIERS

## Abstract

A multichip module of a radio frequency power amplifier includes an active transistor and a matching coupling circuit. The active transistor and matching coupling circuit are integrated in a single package carrier; the matching coupling circuit, obtained by an integrated passive device process, is used for impedance matching and signal coupling and has a coupling output connected to the second pin of the package carrier to serve as an interface for sampling coupling signals of an external circuit, and a through input connected to the output of the active transistor; the matching coupling circuit matches the optimal impedance of the active transistor to Z1; the output impedance Z1 of the through output of the matching coupling circuit is variable; the through output of the matching coupling circuit is connected to the input of a circulator; and the input impedance of the circulator is Z0, which is conjugated with Z1.

## Claims

### Claim 1

A multichip module of a radio frequency power amplifier, comprising:
an active transistor and a matching coupling circuit,
wherein the active transistor and the matching coupling circuit are integrated in a single package carrier; the matching coupling circuit, obtained by an integrated passive device process, is used for impedance matching and signal coupling; the matching coupling circuit has a coupling output connected to the second pin of the package carrier to serve as an interface for sampling coupling signals of an external circuit, and a through input connected to the output of the active transistor; the matching coupling circuit matches the optimal impedance of the active transistor to Z1; the output impedance Z1 of the through output of the matching coupling circuit is variable; the through output of the matching coupling circuit is connected to the input of a circulator; and the input impedance of the circulator is Z0, which is conjugated with Z1.

### Claim 2 (depends on 1)

The multichip module of a radio frequency power amplifier according to claim 1, wherein: the circulator, integrated in a single package carrier, has a through port connected to a third pin of the package carrier, and an isolation port connected to a fourth pin of the package carrier.

### Claim 3 (depends on 1)

The multichip module of a radio frequency power amplifier according to claim 1, wherein: when the optimal impedance of the active transistor is much less than 50 Ohm, the value of Z1 is less than 50 Ohm; and when the optimal impedance of the active transistor is much greater than 50 Ohm, the value of Z1 is greater than 50 Ohm.

### Claim 4 (depends on 1)

The multichip module of a radio frequency power amplifier according to claim 1 further comprising:
a filter and an antenna,
wherein the filter and the antenna are directly connected after the circulator to form a complete transmission link.