A radio frequency front end module and a communication terminal for Wifi communication

Abstract

The application relates to a radio frequency front end module for Wifi communication and a communication terminal, which comprises a main power amplification module and a sub power amplification module connected in parallel, the input ends of the main power amplification module and the sub power amplification module are connected with input signals and output signals respectively, characterized in that the output end of the main power amplification module is connected with an output phase offset module between the output signal, and the sub power amplification module is connected with an input phase offset module between the input signal. The radio frequency front end module for Wifi communication has the following beneficial effects: the power consumption is reduced, the problem of generating high heat is avoided, the heat generation is smaller in the actual application state, the energy saving is better, the overall performance is improved, the use experience of the user is optimized; with the continuous increase of the input signal power, the sub power amplification module is also started, and greater output power is provided, so that the linear power requirement of the power amplifier is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency circuit, more particularly, to a radio frequency front-end module for Wifi communication and a communication terminal. BACKGROUND

[0002] With the continuous progress of Internet technology, people's demand for wireless network bandwidth is also increasing, and wireless Internet technology is also constantly improving, from WiFi4, WiFi5, to now WiFi6 and even WiFi6E, the signal bandwidth is increasing, and the network connection speed is also increasing, which puts higher requirements on WiFi FEM amplifier.

[0003] However, in the process of improving the linear power of the existing WiFi FEM (Front-End Modules, radio frequency front-end module) amplifier, the PAE of the chip itself has not been improved, which causes the chip to consume more power and generate more heat when working, which affects the user experience and also affects the linear power output of the chip itself. SUMMARY

[0004] The technical problem to be solved by the present application is to solve the above-mentioned defects of the prior art, and to provide a radio frequency front-end module for Wifi communication and a communication terminal, the radio frequency front-end module for Wifi communication comprising: a main power amplification module and a sub-power amplification module connected in parallel, the input ends of the main power amplification module and the sub-power amplification module are connected with an input signal and an output signal respectively, characterized in that the output end of the main power amplification module is connected with the output phase offset module between the output signal, and the sub-power amplification module is connected with the input phase offset module between the input signal.

[0005] Further, in some embodiments, it further comprises: a driving stage amplification module, an inter-stage matching module and an output matching module;

[0006] The input end of the driving stage amplification module is connected with the input signal, the output end of the driving stage amplification module is connected with the input end of the inter-stage matching module, and the output end of the inter-stage matching module is connected with the input end of the main power amplification module and the input phase offset module;

[0007] The input end of the output matching module is connected with the output phase offset module and the output end of the sub-power amplification module, and the output end of the output matching module outputs the output signal.

[0008] Further, in some embodiments, the driving stage amplification module comprises: a resistor R1, a capacitor C1 and a triode Q1.

[0009] The first end of the capacitor C1 is connected to the input signal, the second end of the capacitor C1 is connected to the first end of the resistor R1 and the base of the transistor Q1, the second end of the resistor R1 is connected to the power supply Vb, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is connected to the power supply VCC1 and the input end of the inter-stage matching module.

[0010] Further, in some embodiments, the inter-stage matching module comprises: a capacitor C2 and an inductor L1.

[0011] The first end of the capacitor C2 is connected to the collector of the transistor Q1 and the power supply VCC1, the second end of the capacitor C2 is connected to the first end of the inductor L1 and the input end of the main power amplification module and the input phase shift module, and the second end of the inductor L1 is grounded.

[0012] Further, in some embodiments, the input phase shift module comprises: an inductor L2.

[0013] The first end of the inductor L2 is connected to the second end of the capacitor C2, the first end of the inductor L1 and the input end of the main power amplification module, and the second end of the inductor L2 is connected to the input end of the sub-power amplification module.

[0014] Further, in some embodiments, the main power amplification module comprises: a resistor R2, a capacitor C3 and a transistor Q2.

[0015] The first end of the capacitor C3 is connected to the second end of the capacitor C2, the first end of the inductor L1 and the first end of the inductor L2, the second end of the capacitor C3 is connected to the first end of the resistor R2 and the base of the transistor Q2, the second end of the resistor R2 is connected to the power supply Vb, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected to the input end of the output phase shift module.

[0016] Further, in some embodiments, the sub-power amplification module comprises: a resistor R3, a capacitor C4 and a transistor Q3.

[0017] The first end of the capacitor C4 is connected to the second end of the inductor L2, the second end of the capacitor C4 is connected to the first end of the resistor R3 and the base of the transistor Q3, the second end of the resistor R3 is connected to the power supply Vb, the emitter of the transistor Q3 is grounded, and the collector of the transistor Q3 is connected to the output end of the output phase shift module and the input end of the output matching module.

[0018] Further, in some embodiments, the output phase shift module comprises: an inductor L3.

[0019] The first end of the inductor L3 is connected to the collector of the transistor Q2, and the second end of the inductor L3 is connected to the collector of the transistor Q3 and the input end of the output matching module.

[0020] Further low, in some embodiments, the output matching module comprises: an inductor L4 and a capacitor C5;

[0021] The first end of the inductor L4 is connected to the second end of the inductor L3 and the collector of the transistor Q3, and the second end of the inductor L4 outputs the output signal, and the second end of the inductor L4 is also connected to the power supply VCC2 and the first end of the capacitor C5, and the second end of the capacitor C5 is grounded.

[0022] The application also provides a communication terminal comprising the radio frequency front-end module for Wifi communication as claimed in any one of the preceding claims.

[0023] The radio frequency front-end module for Wifi communication of the application has the following beneficial effects: when the frequency of the input signal is low, the sub-power amplification module does not work, at this time, only one current of the main power amplification module is output, that is, when the power saturation is reached, the output current is only half of the peak value, so it has higher PAE, reduces the power consumption, avoids the problem of generating high heat, makes the heat smaller in actual application state, is more energy-saving, improves the overall performance, and optimizes the user's use experience; as the input signal power continues to increase, the sub-power amplification module is also turned on to provide greater output power, so as to meet the linear power requirement of the power amplifier. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in conjunction with the drawings and embodiments, wherein:

[0025] Figure 1 is a schematic diagram of the radio frequency front-end module for Wifi communication of the application, embodiment one;

[0026] Figure 2 is a schematic diagram of the radio frequency front-end module for Wifi communication of the application, embodiment two;

[0027] Figure 3 is a circuit diagram of the radio frequency front-end module for Wifi communication of the application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0029] As Figure 1 shown, the radio frequency front-end module for Wifi communication of the present application comprises: a main power amplification module 400 and a sub-power amplification module 500 connected in parallel, the input ends of the main power amplification module 400 and the sub-power amplification module 500 are connected with an input signal RFIN and an output signal RFOut respectively, and an output phase offset module 600 is connected between the output end of the main power amplification module 400 and the output signal RFOut, and an input phase offset module 300 is connected between the sub-power amplification module 500 and the input signal RFIN.

[0030] Specifically, the input signal is a radio frequency signal, the input phase offset module 300 makes the input signal RFIN of the main power amplification module 400 and the sub-power amplification module 500 phase offset by 90 degrees, thereby realizing high efficiency; the output phase offset module 600 makes the output signal RFOut of the main power amplification module 400 and the sub-power amplification module 500 phase offset by 90 degrees, thereby ensuring that the output phase is consistent with the input phase and ensuring linear output power. When the frequency of the input signal RFIN is low, the sub-power amplification module 500 does not work, at this time, only the current of the main power amplification module 400 is output, that is, when the power is saturated, the output current is only half of the peak value, therefore, it has higher PAE

(Pout-Pin) / Pdc, which is the ratio of radio frequency output power to dissipated direct current power

[0031] Further, in some embodiments, the radio frequency front-end module for Wifi communication of the present application further comprises: a driver stage amplification module 100, an inter-stage matching module 200, and an output matching module 700.

[0032] Specifically, as Figure 2 shown, the input end of the driver stage amplification module 100 is connected with the input signal RFIN, the output end of the driver stage amplification module 100 is connected with the input end of the inter-stage matching module 200, the output end of the inter-stage matching module 200 is connected with the input end of the main power amplification module 400 and the input phase offset module 300; the input end of the output matching module 700 is connected with the output end of the output phase offset module 600 and the sub-power amplification module 500, and the output end of the output matching module 700 outputs the output signal RFOut.

[0033] The driver stage amplifier module 100 mainly amplifies the input signal RFIN and outputs it to the interstage matching module 200, thereby improving the overall output gain of the front-end module. The amplified input signal RFIN is further optimized by the interstage matching module 200 so that it can meet the input power requirements of the subsequent amplifier modules (i.e., the main power amplifier module 400 and the sub-power amplifier module 500).

[0034] Furthermore, such as Figure 3 As shown, in some embodiments, the driver stage amplification module 100 includes a resistor R1, a capacitor C1, and a transistor Q1. The first terminal of capacitor C1 is connected to the input signal RFIN, the second terminal of capacitor C1 is connected to the first terminal of resistor R1 and the base of transistor Q1, the second terminal of resistor R1 is connected to the power supply Vb, the emitter of transistor Q1 is grounded, and the collector of transistor Q1 is connected to the power supply VCC1 and the input terminal of the interstage matching module 200.

[0035] Specifically, transistor Q1 is a PNP transistor. When the input signal RFIN frequency is low, the power supply Vb charges the capacitor C1, which reduces the base voltage of transistor Q1, turns on transistor Q1, and the power supply VCC1 is directly grounded, so the driver stage amplifier module 100 has no voltage output. When the input signal RFIN is high, the base of transistor Q1 maintains a high voltage, transistor Q1 is cut off, and the driver stage amplifier module 100 outputs the power supply VCC1.

[0036] Furthermore, in some embodiments, the interstage matching module 200 includes a capacitor C2 and an inductor L1. The first end of the capacitor C2 is connected to the collector of the transistor Q1 and the power supply VCC1, the second end of the capacitor C2 is connected to the first end of the inductor L1 and the input terminals of the main power amplifier module 400 and the input phase offset module 300, and the second end of the inductor L1 is grounded.

[0037] Specifically, capacitor C2 and inductor L1 form a high-pass LC matching circuit. By adjusting the values ​​of capacitor C2 and inductor L1, the driver stage amplifier module 100 can output sufficiently high linear power to meet the input power requirements of the subsequent amplifier modules (i.e., the main power amplifier module 400 and the sub-power amplifier module 500).

[0038] Furthermore, in some embodiments, the input phase offset module 300 includes an inductor L2.

[0039] The first end of inductor L2 is connected to the second end of capacitor C2, the first end of inductor L1, and the input terminal of main power amplifier module 400. The second end of inductor L2 is connected to the input terminal of sub-power amplifier module 500.

[0040] The main power amplification module 400 directly accesses the output signal of the inter-stage matching module 200, and the input signal of the sub-power amplification module 500 is phase-shifted by the inductor L2, that is, the input signals RFIN of the main power amplification module 400 and the sub-power amplification module 500 are phase-shifted by 90 degrees.

[0041] Further, in some embodiments, the main power amplification module 400 comprises a resistor R2, a capacitor C3 and a triode Q2.

[0042] The first end of the capacitor C3 is connected to the second end of the capacitor C2, the first end of the inductor L1 and the first end of the inductor L2, the second end of the capacitor C3 is connected to the first end of the resistor R2 and the base of the triode Q2, the second end of the resistor R2 is connected to the power supply Vb, the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected to the input end of the output phase shift module 600.

[0043] Specifically, the input signal RFIN is amplified by the driving amplification module to control the conduction or cutoff of the main power amplification module 400, when the input signal RFIN is low, the driving stage amplification module 100 has no voltage output, the triode Q2 is cut off, and the main power amplification module 400 has no current output; when the input signal RFIN is high, the driving stage amplification module 100 outputs the power supply VCC1, the triode Q2 is turned on, and the driving stage amplification module 100 outputs current.

[0044] Further, in some embodiments, the sub-power amplification module 500 comprises a resistor R3, a capacitor C4 and a triode Q3.

[0045] The first end of the capacitor C4 is connected to the second end of the inductor L2, the second end of the capacitor C4 is connected to the first end of the resistor R3 and the base of the triode Q3, the second end of the resistor R3 is connected to the power supply Vb, the emitter of the triode Q3 is grounded, and the collector of the triode Q3 is connected to the output end of the output phase shift module 600 and the input end of the output matching module 700.

[0046] The sub-power amplification module 500 and the main power amplification module 400 have the same structure, both of which are composed of a capacitor, a resistor and a PNP type triode, when the triode Q3 is turned on, the sub-power amplification module 500 has current output, and when the triode Q3 is cut off, the sub-power amplification module 500 has no current output.

[0047] When the frequency of the input signal RFIN is low, the drive amplification module outputs a certain voltage, and through the phase shift of the inductor L2 and the capacitance of C3 and C4, the main power amplification module 400 is in the on and / or amplification state, and the sub-power amplification module 500 is in the off state, at this time, the output current is only the main power amplification module 400, that is, the current when the power is saturated is only half of the peak value, so the radio frequency front end module can have higher PAE, reduce the power consumption, and avoid the problem of generating high heat; with the continuous increase of the power of the input signal RFIN, when the frequency of the input signal RFIN is high, the drive amplification module outputs a higher voltage, at this time, the main power module and the sub-power module are turned on at the same time, and a larger output power is provided, so as to meet the requirement of linear power of the power amplifier.

[0048] Further, in some embodiments, the output phase shift module 600 comprises: an inductor L3. The first end of the inductor L3 is connected to the collector of the triode Q2, and the second end of the inductor L3 is connected to the collector of the triode Q3 and the input end of the output matching module 700.

[0049] When the main power amplification module 400 and the sub-power amplification module 500 are turned on at the same time, the main power amplification module 400 is phase-shifted through the inductor L3, so that the phase of the main power amplification module 400 and the sub-power amplification module 500 is consistent, avoiding the problem that the power output of the two cannot be normally superimposed due to the phase shift of the sub-power amplification module 500, so as to ensure the linear output power.

[0050] In the terminal module of the application, Vb, VCC1 and VCC2 are all 5V power supplies.

[0051] Further, in some embodiments, the output matching module 700 comprises: an inductor L4 and a capacitor C5. The first end of the inductor L4 is connected to the second end of the inductor L3 and the collector of the triode Q3, the second end of the inductor L4 outputs the output signal RFOut, and the second end of the inductor L4 is also connected to the power supply VCC2 and the first end of the capacitor C5, and the second end of the capacitor C5 is grounded.

[0052] The output impedance matching circuit composed of the inductor L4 and the capacitor C5 makes it easier for the output power of the main power amplification module 400 and the sub-power amplification module 500 to reach the saturation state.

[0053] The radio frequency front end module for Wifi communication implemented by the present application has the following beneficial effects: when the frequency of the input signal RFIN is low, the sub-power amplification module 500 does not work, at this time, only one current of the main power amplification module 400 is output, that is, when the power is saturated, the output current is only half of the peak value, so it has higher PAE, reduces the power consumption, avoids the problem of generating high heat, makes the heat smaller in the actual application state, is more energy-saving, improves the overall performance, optimizes the user's use experience; as the power of the input signal RFIN continues to increase, the sub-power amplification module 500 is also started, and larger output power is provided, so that it meets the linear power requirement of the power amplifier.

[0054] The present application also provides a signal terminal comprising the radio frequency front end module for Wifi communication disclosed in the embodiments of the present application, so that the signal terminal has the advantages of small heat generation and energy saving.

[0055] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it accordingly, and cannot limit the protection scope of the present application. Any equivalent changes and modifications made within the scope of the claims of the present application shall belong to the scope of protection of the claims of the present application.

[0056] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the claims of the present application.

Claims

1. A radio frequency front end module for Wifi communication, comprising: The parallelly connected main power amplification module and sub power amplification module, the input end and the output end of the main power amplification module and the sub power amplification module are connected with the input signal and the output signal respectively, characterized in that the output end of the main power amplification module is connected with the output phase offset module between the output signal, and the sub power amplification module is connected with the input phase offset module between the input signal; Further comprising: a driving stage amplification module, an inter-stage matching module and an output matching module; The input end of the driving stage amplification module is connected with the input signal, the output end of the driving stage amplification module is connected with the input end of the inter-stage matching module, and the output end of the inter-stage matching module is connected with the input end of the main power amplification module and the input phase offset module, wherein the driving stage amplification module amplifies the input signal and outputs to the inter-stage matching module, so as to improve the overall output gain of the radio frequency front end module; the amplified input signal is further optimized through the inter-stage matching module, so as to meet the demand of the main power amplification module and the sub power amplification module for the input power; The input end of the output matching module is connected with the output phase offset module and the output end of the sub power amplification module, and the output end of the output matching module outputs the output signal.

2. The radio frequency front-end module for Wifi communication of claim 1, wherein, The driving stage amplification module comprises a resistor R1, a capacitor C1 and a triode Q1; The first end of the capacitor C1 is connected with the input signal, the second end of the capacitor C1 is connected with the first end of the resistor R1 and the base of the triode Q1, the second end of the resistor R1 is connected with the power supply Vb, the emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected with the power supply VCC1 and the input end of the inter-stage matching module.

3. The radio frequency front-end module for Wifi communication of claim 2, wherein, The inter-stage matching module comprises a capacitor C2 and an inductor L1; The first end of the capacitor C2 is connected with the collector of the triode Q1 and the power supply VCC1, the second end of the capacitor C2 is connected with the first end of the inductor L1 and the input end of the main power amplification module and the input phase offset module, and the second end of the inductor L1 is grounded.

4. The radio frequency front-end module for Wifi communication of claim 3, wherein, The input phase offset module comprises an inductor L2; The first end of the inductor L2 is connected with the second end of the capacitor C2, the first end of the inductor L1 and the input end of the main power amplification module, and the second end of the inductor L2 is connected with the input end of the sub power amplification module.

5. The radio frequency front-end module for Wifi communication of claim 4, wherein, The main power amplification module comprises a resistor R2, a capacitor C3 and a triode Q2; The first end of the capacitor C3 is connected with the second end of the capacitor C2, the first end of the inductor L1 and the first end of the inductor L2, the second end of the capacitor C3 is connected with the first end of the resistor R2 and the base of the triode Q2, the second end of the resistor R2 is connected with the power supply Vb, the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected with the input end of the output phase offset module.

6. The radio frequency front-end module for Wifi communication of claim 5, wherein, The sub power amplification module comprises a resistor R3, a capacitor C4 and a triode Q3; A first end of the capacitor C4 is connected to a second end of the inductor L2, a second end of the capacitor C4 is connected to a first end of the resistor R3 and a base of the transistor Q3, a second end of the resistor R3 is connected to the power supply Vb, an emitter of the transistor Q3 is grounded, a collector of the transistor Q3 is connected to an output of the output phase offset module and an input of the output matching module.

7. The radio frequency front-end module for Wifi communication of claim 6, wherein, The output phase offset module comprises an inductor L3. A first end of the inductor L3 is connected to a collector of the transistor Q2, a second end of the inductor L3 is connected to a collector of the transistor Q3 and an input of the output matching module.

8. The radio frequency front-end module for Wifi communication of claim 7, wherein, The output matching module comprises an inductor L4 and a capacitor C5. A first end of the inductor L4 is connected to a second end of the inductor L3 and a collector of the transistor Q3, a second end of the inductor L4 outputs the output signal, the second end of the inductor L4 is also connected to a power supply VCC2 and a first end of the capacitor C5, a second end of the capacitor C5 is grounded.

9. A communication terminal, characterized by The radio frequency front end module for Wifi communication of any one of claims 1-8. The radio frequency front end module for Wifi communication of any one of claims 1-8.

Images