CN-224205084-U - Radio frequency front end module

CN224205084UCN 224205084 UCN224205084 UCN 224205084UCN-224205084-U

Abstract

The utility model provides a radio frequency front end module which comprises a substrate, a first chip, a second chip, a third chip, a coupler, a Bluetooth signal transmitting end, a radio frequency signal transmitting end, an antenna end, a radio frequency signal receiving end and a coupling power output end, wherein the first chip, the second chip, the third chip and the coupler are all fixed on the substrate, the first chip is integrated with a power amplifying circuit and a resistor, the second chip is integrated with a logic control circuit and a first voltage converting circuit, and the third chip is integrated with a first switching circuit and a second switching circuit. The utility model can simplify the mode of controlling the emission power of the radio frequency front end module, reduce radiation and energy consumption, and prolong the service life of the radio frequency front end module.

Inventors

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Assignees

深圳飞骧科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250421

Claims (10)

1. The radio frequency front end module is characterized by comprising a substrate, a first chip, a second chip, a third chip, a coupler, a Bluetooth signal transmitting end, a radio frequency signal transmitting end, an antenna end, a radio frequency signal receiving end and a coupling power output end, wherein the first chip, the second chip, the third chip and the coupler are all fixed on the substrate; The first input end of the power amplification circuit is used for being connected to an external first power supply, and the output end of the power amplification circuit is connected to the input end of the coupler; the first end of the resistor is grounded; The input end of the logic control circuit is used for receiving an externally transmitted level signal, and the output end of the logic control circuit is used for outputting a logic control signal according to the received level signal; The first input end of the first voltage conversion circuit is used for being connected to an external second power supply, the second input end of the first voltage conversion circuit is connected to the output end of the logic control circuit, and the output end of the first voltage conversion circuit is connected to the second input end of the power amplification circuit; The first input end of the first switching circuit is connected to the Bluetooth signal transmitting end, the second input end of the first switching circuit is connected to the radio frequency signal transmitting end, the third input end of the first switching circuit is connected to the output end of the logic control circuit, the first output end of the first switching circuit is connected to the third input end of the power amplification circuit, the second output end of the first switching circuit is connected to the input end of the coupler, and the first switching circuit is used for controlling whether the first input end of the first switching circuit is communicated with the Bluetooth signal transmitting end or not according to a logic control signal output by the output end of the logic control circuit, controlling whether the second input end of the first switching circuit is communicated with the radio frequency signal transmitting end or not, and simultaneously controlling whether the first output end of the first switching circuit is communicated with the third input end of the power amplification circuit or not, and controlling whether the second output end of the first switching circuit is communicated with the input end of the coupler or not; The control end of the second switching circuit is connected to the antenna end, the first connection end of the second switching circuit is connected to the radio frequency signal receiving end, the second connection end of the second switching circuit is connected to the output end of the coupler, the input end of the second switching circuit is connected to the output end of the logic control circuit, and the control end of the second switching circuit is controlled to be communicated to the first connection end of the second switching circuit or the second connection end of the second switching circuit according to a logic control signal output by the output end of the logic control circuit; the isolation end of the coupler is connected to the second end of the resistor, and the coupling end of the coupler is connected to the coupling power output end.
2. The radio frequency front end module of claim 1, wherein the power amplification circuit comprises an input matching circuit, a power amplifier, an output matching circuit, and a bias circuit; The input end of the input matching circuit is used as a third input end of the power amplifying circuit; The first input end of the power amplifier is connected to the output end of the input matching circuit, and the second input end of the power amplifier is used as the first input end of the power amplifying circuit; The input end of the output matching circuit is connected to the output end of the power amplifier, and the output end of the output matching circuit is used as the output end of the power amplifying circuit; an input end of the bias circuit is used as a second input end of the power amplifying circuit, and an output end of the bias circuit is connected to a third input end of the power amplifier.
3. The radio frequency front end module of claim 2, wherein the power amplifier is comprised of a multi-stage transistor amplification circuit.
4. The radio frequency front end module of claim 1, wherein the first switching circuit comprises a first single pole single throw radio frequency switch, a single pole three throw radio frequency switch, and a second single pole single throw radio frequency switch; The first connecting end of the first single-pole single-throw radio frequency switch is connected to the Bluetooth signal transmitting end, the second connecting end of the first single-pole single-throw radio frequency switch is connected to the input end of the coupler, and the control end of the first single-pole single-throw radio frequency switch is connected to the output end of the logic control circuit and used for controlling the first single-pole single-throw radio frequency switch to be turned on or turned off according to a logic control signal output by the output end of the logic control circuit; The public end of the single-pole three-throw radio frequency switch is connected to the input end of the power amplifying circuit, the first connecting end of the single-pole three-throw radio frequency switch is connected to the Bluetooth signal transmitting end, the second connecting end of the single-pole three-throw radio frequency switch is connected to the radio frequency signal transmitting end, the third connecting end of the single-pole three-throw radio frequency switch is suspended, the first control end and the second control end of the single-pole three-throw radio frequency switch are respectively connected to the output end of the logic control circuit, and the public end of the single-pole three-throw radio frequency switch is controlled to be communicated to one of the first connecting end of the single-pole three-throw radio frequency switch, the second connecting end of the single-pole three-throw radio frequency switch and the third connecting end of the single-pole three-throw radio frequency switch according to a logic control signal output by the output end of the logic control circuit; The first connecting end of the second single-pole single-throw radio frequency switch is connected to the radio frequency signal transmitting end, the second connecting end of the second single-pole single-throw radio frequency switch is connected to the input end of the coupler, and the control end of the second single-pole single-throw radio frequency switch is connected to the output end of the logic control circuit and used for controlling the second single-pole single-throw radio frequency switch to be turned on or turned off according to a logic control signal output by the output end of the logic control circuit; The first connection end of the first single-pole single-throw radio frequency switch and the first connection end of the single-pole three-throw radio frequency switch are used as the first input end of the first switching circuit together, the second connection end of the single-pole three-throw radio frequency switch and the first connection end of the second single-pole single-throw radio frequency switch are used as the second input end of the first switching circuit together, the common end of the single-pole three-throw radio frequency switch is used as the first output end of the first switching circuit, the second connection end of the first single-pole single-throw radio frequency switch and the second connection end of the second single-pole single-throw radio frequency switch are used as the second output end of the first switching circuit together, and the control end of the first single-pole single-throw radio frequency switch, the first control end and the second control end of the single-pole three-throw radio frequency switch and the control end of the second single-pole single-throw radio frequency switch are used as the third input end of the first switching circuit together.
5. The radio frequency front end module of claim 1, wherein the second switching circuit comprises a single pole double throw radio frequency switch, wherein a common terminal of the single pole double throw radio frequency switch is used as a control terminal of the second switching circuit, a first connection terminal of the single pole double throw radio frequency switch is used as a first connection terminal of the second switching circuit, a second connection terminal of the single pole double throw radio frequency switch is used as a second connection terminal of the second switching circuit, and a control terminal of the single pole double throw radio frequency switch is used as an input terminal of the second switching circuit.
6. The radio frequency front end module of claim 5, wherein the second switching circuit further comprises a second voltage conversion circuit and a low noise amplifier; The first input end of the second voltage conversion circuit is used for being connected to an external second power supply, and the second input end of the second voltage conversion circuit is connected to the output end of the logic control circuit; the first input end of the low-noise amplifier is connected to the first connection end of the single-pole double-throw radio frequency switch, the second input end of the low-noise amplifier is connected to the output end of the second voltage conversion circuit, and the output end of the low-noise amplifier is connected to the radio frequency signal receiving end.
7. The radio frequency front end module as set forth in claim 6, wherein the second switching circuit further comprises a third single pole single throw radio frequency switch, wherein the third single pole single throw radio frequency switch further comprises a first connection terminal connected to the single pole double throw radio frequency switch, wherein the second connection terminal of the third single pole single throw radio frequency switch is connected to the radio frequency signal receiving terminal, wherein a control terminal of the third single pole single throw radio frequency switch is connected to an output terminal of the logic control circuit, and is configured to control the third single pole single throw radio frequency switch to be turned on or off according to a logic control signal output from the output terminal of the logic control circuit.
8. The rf front-end module of claim 1, wherein the first chip, the second chip, and the third chip are fixedly connected to the substrate by means of silver paste or solder ball bonding.
9. The rf front-end module of claim 1, wherein the electrical connection between the substrate, the first chip, the second chip, and the third chip is made by thin metal wires or by solder balls in a flip-chip mounting.
10. The radio frequency front end module of claim 1, wherein the first chip is formed from a GaAs process, the second chip is formed from a CMOS process, and the third chip is formed from a PHEMT process or an SOI process.

Description

Radio frequency front end module Technical Field The utility model relates to the technical field of wireless communication, in particular to a radio frequency front end module. Background In a TDD (time division duplex) system such as WIFI, a radio frequency Front End Module (FEM) is often required. The radio frequency front-end module is composed of a radio frequency switch, a Power Amplifier (PA), a Low Noise Amplifier (LNA) and other circuits. The radio frequency switch switches a radio frequency channel according to the receiving/transmitting time sequence control signal, the radio frequency power amplifier is used for amplifying the transmitting signal, and the low-noise amplifier is used for amplifying the receiving weak signal. However, in the actual circuit, the intensity of the received signal varies greatly, and the dynamic range of the signal can reach more than 90dB, so that the receiving path is also required to be designed with a bypass channel (ByPass) in order to cope with the reception of a strong signal, when the strong signal is received, the bypass channel is opened in the radio frequency front end module, the low noise amplifier channel is closed, and when the weak signal is received, the bypass channel is closed, and the low noise amplifier channel is opened. In the prior art, the mode of controlling the transmitting power of the circuit of the radio frequency front end module is complex, and the radiation and energy consumption are high, so that the requirements of practical application cannot be met. Disclosure of utility model Aiming at the defects in the prior art, the utility model provides a radio frequency front end module to solve the problems that the mode of controlling the transmitting power of the radio frequency front end module in the prior art is complex and the radiation and energy consumption are high. In order to solve the technical problems, the utility model provides a radio frequency front end module, which comprises a substrate, a first chip, a second chip, a third chip, a coupler, a Bluetooth signal transmitting end, a radio frequency signal transmitting end, an antenna end, a radio frequency signal receiving end and a coupling power output end, wherein the first chip, the second chip, the third chip and the coupler are all fixed on the substrate; The first input end of the power amplification circuit is used for being connected to an external first power supply, and the output end of the power amplification circuit is connected to the input end of the coupler; the first end of the resistor is grounded; The input end of the logic control circuit is used for receiving an externally transmitted level signal, and the output end of the logic control circuit is used for outputting a logic control signal according to the received level signal; The first input end of the first voltage conversion circuit is used for being connected to an external second power supply, the second input end of the first voltage conversion circuit is connected to the output end of the logic control circuit, and the output end of the first voltage conversion circuit is connected to the second input end of the power amplification circuit; The first input end of the first switching circuit is connected to the Bluetooth signal transmitting end, the second input end of the first switching circuit is connected to the radio frequency signal transmitting end, the third input end of the first switching circuit is connected to the output end of the logic control circuit, the first output end of the first switching circuit is connected to the third input end of the power amplification circuit, the second output end of the first switching circuit is connected to the input end of the coupler, and the first switching circuit is used for controlling whether the first input end of the first switching circuit is communicated with the Bluetooth signal transmitting end or not according to a logic control signal output by the output end of the logic control circuit, controlling whether the second input end of the first switching circuit is communicated with the radio frequency signal transmitting end or not, and simultaneously controlling whether the first output end of the first switching circuit is communicated with the third input end of the power amplification circuit or not, and controlling whether the second output end of the first switching circuit is communicated with the input end of the coupler or not; The control end of the second switching circuit is connected to the antenna end, the first connection end of the second switching circuit is connected to the radio frequency signal receiving end, the second connection end of the second switching circuit is connected to the output end of the coupler, the input end of the second switching circuit is connected to the output end of the logic control circuit, and the control end of the second switching circuit is controlled to be communicated to the first c