WO-2026092044-A1 - RADIO-FREQUENCY FRONT-END MODULE AND RADIO-FREQUENCY CHIP

WO2026092044A1WO 2026092044 A1WO2026092044 A1WO 2026092044A1WO-2026092044-A1

Abstract

The present invention relates to the technical field of wireless communications. Provided are a radio frequency front-end module and a radio frequency chip. The radio frequency front-end module comprises a substrate, and a first die, a second die and a third die, which are arranged on the substrate, wherein a power amplifier circuit is arranged on the first die and is configured to amplify transmitted radio frequency signals; a first voltage conversion circuit is arranged on the second die and is configured to convert a power supply into a preset voltage and then output the preset voltage to the first die to provide power; a control module is arranged on the third die and is configured to process the amplified signals output by the power amplifier circuit and output corresponding control signals to perform switching; an output end of the control module is configured to control the switching between different radio frequency signals to a signal receiving end; an input end of the first voltage conversion circuit is configured to connect to the power supply; and the first voltage conversion circuit is configured to convert the power supply into an operating voltage and output same to the power amplifier circuit. The radio frequency front-end module of the present invention can improve reliability and the effect of switching between transmitted and received signals.

Inventors

SHAO, Yixiang
YU, Zetian
GUO, Jiashuai

Assignees

深圳飞骧科技股份有限公司

Dates

Publication Date: 20260507
Application Date: 20250929
Priority Date: 20241028

Claims (9)

A radio frequency front-end module, characterized in that the radio frequency front-end module includes: a substrate, a first chip, a second chip and a third chip disposed on the substrate; The first chip is equipped with a power amplifier circuit for amplifying the transmitted radio frequency signal; The second chip is provided with a first voltage conversion circuit, which is used to convert the power supply into a preset voltage and output it to the first chip to provide power. The third chip is equipped with a control module, which is used to process the amplified signal output by the power amplifier circuit and output corresponding control signals to realize switching. The first input terminal of the power amplifier circuit is connected to the signal transmitting terminal, and the power amplifier circuit is used to amplify the input radio frequency signal; the output terminal of the power amplifier circuit is connected to the first input terminal of the control module. The output of the control module is used to control the switching of different radio frequency signals to the signal receiving end; The input terminal of the first voltage conversion circuit is connected to the power supply, and the output terminal of the first voltage conversion circuit is connected to the second input terminal of the power amplifier circuit. The first voltage conversion circuit is used to convert the power supply into a working voltage and output it to the power amplifier circuit. The second input terminal of the control module is connected to the power supply and is used to provide power to the control module. The control terminal of the control module is connected to the antenna terminal. The control module includes a switching circuit, a second voltage conversion circuit, and a switch control circuit. The input terminal of the switch control circuit is used to connect to an external logic control circuit, and the output terminal of the switch control circuit is used to output the control signal of the external logic control circuit to the switching circuit to realize the switching function of the switching circuit; the first input terminal of the switching circuit serves as the first input terminal of the control module, the input terminal of the second voltage conversion circuit serves as the second input terminal of the control module, and the output terminal of the second voltage conversion circuit is connected to the second input terminal of the switching circuit; the output terminal of the switching circuit serves as the output terminal of the control module, and the control terminal of the switching circuit is connected to the antenna terminal.
The radio frequency front-end module as described in claim 1, wherein the switching circuit includes a first radio frequency switch and a receiving circuit; The output terminal of the switch control circuit is used to control the operation of the first radio frequency switch; the control terminal of the first radio frequency switch serves as the control terminal of the switching circuit, the first output terminal of the first radio frequency switch serves as the first input terminal of the switching circuit, the second output terminal of the first radio frequency switch is connected to the input terminal of the receiving circuit, the input terminal of the receiving circuit also serves as the second input terminal of the switching circuit, and the output terminal of the receiving circuit serves as the output terminal of the switching circuit.
The radio frequency front-end module as described in claim 2, wherein the receiving circuit includes a first low-noise amplifier and a second radio frequency switch; The input terminal of the first low-noise amplifier is connected to the control terminal of the second radio frequency switch and serves as the input terminal of the receiving circuit. The output terminal of the first low-noise amplifier is connected to the output terminal of the second radio frequency switch and serves as the output terminal of the receiving circuit.
The RF front-end module as described in claim 1, wherein the switching circuit includes a third RF switch and a second low-noise amplifier; The output terminal of the switch control circuit is used to control the operation of the third radio frequency switch; the control terminal of the third radio frequency switch serves as the control terminal of the switching circuit, the first output terminal of the third radio frequency switch serves as the first input terminal of the switching circuit, the second output terminal of the third radio frequency switch is connected to the input terminal of the second low noise amplifier, the input terminal of the second low noise amplifier also serves as the second input terminal of the switching circuit and is connected to the output terminal of the second voltage conversion circuit; the third output terminal of the third radio frequency switch is connected to the output terminal of the second low noise amplifier and serves as the output terminal of the switching circuit.
The RF front-end module as described in claim 1 is characterized in that the power amplifier circuit includes a first matching circuit, a second matching circuit, a transmit bias circuit, and a power amplifier; The input terminal of the first matching circuit serves as the first input terminal of the power amplifier circuit, and the input terminal of the transmitting bias circuit serves as the second input terminal of the power amplifier circuit. The output terminals of the first matching circuit and the transmitting bias circuit are respectively connected to the input terminals of the power amplifier. The output terminal of the power amplifier is connected to the input terminal of the second matching circuit, and the output terminal of the second matching circuit serves as the output terminal of the power amplifier circuit. The input terminal of the power amplifier is also used to connect to the power supply voltage.
The RF front-end module as described in claim 5 is characterized in that the power amplifier is composed of a multi-stage transistor amplifier circuit.
The radio frequency front-end module as described in claim 1 is characterized in that the first chip, the second chip and the third chip are fixedly connected to the substrate by means of silver paste or solder balls.
The RF front-end module as described in claim 1 is characterized in that the first chip is manufactured using GaAs technology; the second chip is manufactured using CMOS technology; and the third chip is manufactured using PHEMT or SOI technology.
A radio frequency (RF) chip, characterized in that it includes an RF front-end module as described in any one of claims 1-8.

Description

RF front-end module and RF chip Technical Field This invention relates to the field of wireless communication technology, and in particular to a radio frequency front-end module and a radio frequency chip. Background Technology In TDD (Time Division Duplex) systems such as wireless communication and Wi-Fi, TDD is a duplexing method used to separate the receive and transmit channels. TDD mode ensures time separation by receiving and transmitting in different time slots on the same frequency channel. TDD systems often require a radio frequency front-end module (FEM). This FEM typically consists of a radio frequency switch, a radio frequency power amplifier (PA), and a low-noise amplifier (LNA). The radio frequency switch switches the radio frequency path according to the transmit/receive timing control signal; the radio frequency power amplifier amplifies the transmitted signal; and the low-noise amplifier amplifies the weak received signal. In actual circuit operation, the received signal strength varies greatly, with a dynamic range exceeding 90dB. To handle strong signals, a bypass channel is required in the receiving path. When a strong signal is received, the RF front-end module internally opens the bypass channel and shuts down the low-noise amplifier channel; otherwise, it shuts down the bypass channel and opens the low-noise amplifier channel. However, adding a bypass channel increases circuit complexity, resulting in poor RF signal transmission and reception control of the RF front-end module and low reliability. Summary of the Invention This invention provides a radio frequency front-end module to solve the problems of poor radio frequency signal transmission and reception control and low reliability in existing radio frequency front-end modules. In a first aspect, embodiments of the present invention provide a radio frequency front-end module, the radio frequency front-end module comprising: a substrate, a first chip, a second chip and a third chip disposed on the substrate; The first chip is equipped with a power amplifier circuit for amplifying the transmitted radio frequency signal; The second chip is provided with a first voltage conversion circuit, which is used to convert the power supply into a preset voltage and output it to the first chip to provide power. The third chip is equipped with a control module, which is used to process the amplified signal output by the power amplifier circuit and output corresponding control signals to realize switching. The first input terminal of the power amplifier circuit is connected to the signal transmitting terminal, and the power amplifier circuit is used to amplify the input radio frequency signal; the output terminal of the power amplifier circuit is connected to the first input terminal of the control module. The output of the control module is used to control the switching of different radio frequency signals to the signal receiving end; The input terminal of the first voltage conversion circuit is connected to the power supply, and the output terminal of the first voltage conversion circuit is connected to the second input terminal of the power amplifier circuit. The first voltage conversion circuit is used to convert the power supply into a working voltage and output it to the power amplifier circuit. The second input terminal of the control module is connected to the power supply and is used to provide power to the control module. The control terminal of the control module is connected to the antenna terminal. The control module includes a switching circuit, a second voltage conversion circuit, and a switch control circuit. The input terminal of the switch control circuit is used to connect to an external logic control circuit, and the output terminal of the switch control circuit is used to output the control signal of the external logic control circuit to the switching circuit to realize the switching function of the switching circuit; the first input terminal of the switching circuit serves as the first input terminal of the control module, the input terminal of the second voltage conversion circuit serves as the second input terminal of the control module, and the output terminal of the second voltage conversion circuit is connected to the second input terminal of the switching circuit; the output terminal of the switching circuit serves as the output terminal of the control module, and the control terminal of the switching circuit is connected to the antenna terminal. Preferably, the switching circuit includes a first radio frequency switch and a receiving circuit; The output terminal of the switch control circuit is used to control the operation of the first radio frequency switch; the control terminal of the first radio frequency switch serves as the control terminal of the switching circuit, the first output terminal of the first radio frequency switch serves as the first input terminal of the switching circuit, the second output termina