WO2021227281A1

WO2021227281A1 - Power amplifier module and wireless device

Info

Publication number: WO2021227281A1
Application number: PCT/CN2020/109031
Authority: WO
Inventors: 倪楠; 胡自洁; 曹原; 倪建兴
Original assignee: 锐石创芯（深圳）科技有限公司
Priority date: 2020-05-09
Filing date: 2020-08-14
Publication date: 2021-11-18
Also published as: CN111555763B; CN111555763A

Abstract

Disclosed in the present application are a power amplifier module and a wireless device, applied to the technical field of radio-frequency circuits and used for solving the problem of the low integration level of power amplifier modules. The power amplifier module comprises a power amplifier and an adjustable LC network connected to an input end of the power amplifier; the adjustable LC network comprises an adjustable capacitor network and an adjustable inductor network; a capacitance value of the adjustable capacitance network accessing a circuit and an inductance value of the adjustable inductor network accessing the circuit can be controlled by changing the configuration of switches. Both phase compensation and harmonic filtration can be performed on the power amplifier by means of one adjustable LC network; the power amplifier module in the present application uses a small number of circuit devices and occupies less space, thus facilitating improvement of the integration level and miniaturization of the power amplifier module.

Description

Power amplifier module and wireless device

This application is based on a Chinese invention patent application named "Power Amplifier Module and Wireless Device" with the application number 202010386513.6 filed on May 9, 2020, and claims its priority.

Technical field

This application relates to the technical field of radio frequency circuits, in particular to power amplifier modules and wireless devices.

Background technique

For an ideal amplifier, the phase characteristic is a constant that does not change with frequency and power. In actual circuits, due to the existence of nonlinear parasitic parameters, this ideal phase characteristic does not exist. The parasitic capacitance between the input terminal and the output terminal of the transistor is the main factor affecting the phase characteristic. The transistor may be a MOS tube or a BJT tube. Illustratively, the parasitic capacitance C _bc between the base and collector of the BJT tube is the main factor that affects the phase characteristics. It can be equivalent to a capacitance at the input terminal by the formula (1+A)*C _bc. A is the amplification factor of the triode. It can be seen that there are two variables that affect the phase characteristics: the parasitic capacitance C _bc and the amplification factor A. This equivalent formula is called the Miller effect. The parasitic capacitance C _bc varies with frequency and power. When the load impedance of the transistor is constant, the amplification factor A is mainly determined by the output impedance and output of the current source signal. The current determines that it does not change with frequency. In the conventional processing method, a parallel capacitor is usually used at the input end of the power amplifier to offset the influence of the _{parasitic capacitance C bc.}

In some switch-mode power amplifiers, such as E, F, F-1, or J power amplifiers, it is necessary to set up a resonant circuit structure to filter out some harmonics of the output current to make the output current or voltage Only the required frequency components are maintained.

It is precisely because of many factors that need to be considered in the design of power amplifiers that the circuit structure of the existing power amplifier modules is becoming more and more complex, and the number of circuit components increases, resulting in low integration of the power amplifier module, which is not conducive to the miniaturization of the power amplifier module in application .

Summary of the invention

The embodiments of the present application provide a power amplifier module and a wireless device to solve the problem of low integration of the power amplifier module.

The present application provides a power amplifier module, including a power amplifier, and an adjustable LC network connected to the input end of the power amplifier;

The adjustable LC network includes an adjustable capacitance network and an adjustable inductance network;

The adjustable capacitor network includes more than two capacitors and more than one switch, and the capacitance value of the access circuit of the adjustable capacitor network is controlled by changing the configuration of the switches in the adjustable capacitor network;

The adjustable inductance network includes more than two inductors and more than one switch, and the inductance value of the circuit connected to the adjustable inductance network is controlled by changing the configuration of the switches in the adjustable inductance network.

Optionally, the power amplifier module executes the following steps during operation: acquiring the current operating frequency of the power amplifier, determining the target capacitance value and target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and changing the The configuration of the switches in the adjustable LC network allows the adjustable LC network to be connected to the circuit with the target capacitance value and target inductance value, and realizes the phase compensation and harmonic filtering of the power amplifier at the same time, the preset The compensation relationship records the corresponding relationship between the operating frequency of the power amplifier and the capacitance value and inductance value of the adjustable LC network.

Optionally, the preset compensation relationship is determined in advance through the following steps:

Determining each operating frequency of the power amplifier;

When the power amplifier is at different operating frequencies, determine the capacitance value that the adjustable LC network should be connected to the circuit to compensate for the influence of the parasitic capacitance on the phase characteristics, and obtain each operating frequency of the power amplifier and the adjustable LC Correspondence of the capacitance value of the network;

When the power amplifier is at different operating frequencies, the determined capacitance values of the circuit that the adjustable LC network should be connected to are substituted into the preset first formula to calculate, and it is obtained that the adjustable LC network should be connected to The inductance value of the circuit that can resonate at the resonant frequency to filter out the harmonics, and obtain the corresponding relationship between each operating frequency of the power amplifier and the inductance value of the adjustable LC network;

The preset first formula is:

Among them, f _n refers to the operating frequency, 2f _n is the resonant frequency, C _fn refers to the capacitance value of the adjustable LC network that should be connected to the circuit under _fn , and L fn refers to the adjustable LC network under _{f n} The inductance value of the circuit should be connected.

Optionally, the power amplifier module further includes a controller;

The controller is configured to: obtain the current operating frequency of the power amplifier, determine a target capacitance value and a target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and change the configuration of switches in the adjustable LC network The adjustable LC network is connected to the circuit with the target capacitance value and target inductance value.

Optionally, the adjustable capacitance network is composed of a fixed capacitance circuit part and a variable capacitance circuit part, wherein the variable capacitance circuit part is composed of more than one set of capacitors with switches.

Optionally, the adjustable inductance network is composed of a fixed inductance circuit part and a variable inductance circuit part, wherein the variable inductance circuit part is composed of more than one set of switch inductors.

Optionally, the power amplifier is a multi-stage power amplifier;

The adjustable LC network is arranged at the input end of the output stage power amplifier tube in the multi-stage power amplifier, or the adjustable LC network is arranged at the output end of the input stage power amplifier tube in the multi-stage power amplifier.

Optionally, the power amplifier is a multi-stage power amplifier;

The adjustable LC network includes more than two sets of adjustable capacitor networks and adjustable inductance networks. In the multi-stage power amplifier, a set of adjustable capacitor networks and adjustable inductance networks are respectively provided at the input or output ends of the two or more power amplifier tubes. Adjust the inductance network.

Optionally, the power amplifier module further includes an output impedance matching network in electrical communication with the output end of the power amplifier.

The present application also provides a wireless device, including a load line and a power amplifier module whose output terminal is connected to the load line;

The power amplifier module includes a power amplifier, and an adjustable LC network connected to the input end of the power amplifier;

The details of one or more embodiments of the present application are presented in the following drawings and description, and other features and advantages of the present application will become apparent from the description, drawings and claims.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Fig. 1 is a circuit diagram of a first example of a power amplifier module of this application;

Fig. 2 is a circuit diagram of an example of an adjustable capacitor network of this application;

FIG. 3 is a circuit diagram of another example of an adjustable capacitor network of this application;

FIG. 4 is a circuit diagram of an example of an adjustable inductance network of this application;

FIG. 5 is a circuit diagram of another example of a tunable inductance network of this application;

FIG. 6 is a circuit diagram of a second example of a power amplifier module of this application;

FIG. 7 is a circuit diagram of a third example of a power amplifier module of this application;

FIG. 8 is a circuit diagram of a fourth example of a power amplifier module of this application;

FIG. 9 is a circuit diagram of a fifth example of a power amplifier module of this application;

FIG. 10 is a circuit diagram of a sixth example of a power amplifier module of this application;

FIG. 11 is a circuit diagram of a seventh example of a power amplifier module of this application;

FIG. 12 is a circuit diagram of an example of a wireless device of this application;

FIG. 13 is a circuit diagram of another example of a wireless device of this application.

Detailed ways

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In order to improve the efficiency of the power amplifier while maintaining good linearity, many designers of linear power amplifiers have adopted class F and inverse class F power amplifiers. However, as mentioned in the background art, maintaining the operation of class F and inverse class F power amplifiers often requires the use of harmonic termination at the output of the power amplifier; in addition, in order to offset the influence of parasitic capacitance on the phase characteristics, it is usually necessary to A capacitor is connected in parallel at the input of the amplifier. The requirements of many factors make the circuit structure of the existing power amplifier module more and more complicated, and the number of circuit components increases, which is not conducive to the miniaturization of the power amplifier module in application.

For this reason, the power amplifier module proposed in the embodiment of the present application can realize the phase compensation and harmonic filtering of the power amplifier together through an adjustable LC network. The number of circuit components and the occupied space of the power amplifier module of the present application are increased. Small, which is conducive to improving the integration and miniaturization of the power amplifier module.

FIG. 1 is a circuit diagram of an example of a power amplifier module of this application. The power amplifier module includes a power amplifier 101 and an adjustable LC network 102 connected to the input end of the power amplifier 101. In the example of FIG. 1, the adjustable LC network 102 is connected to the input end of the power amplifier 101. Optionally, the collector of the power amplifier 101 can be connected to an inductor.

The tunable LC network 102 includes a first tunable network and a second tunable network, wherein the first tunable network is a tunable capacitor network, the second tunable network is a tunable inductance network, or the first tunable network It is a tunable inductance network, and the second tunable network is a tunable capacitor network. Therefore, the adjustable LC network 102 is composed of at least one adjustable capacitance network and at least one adjustable inductance network. By changing the capacitance and inductance values in the adjustable LC network 102 for a specific operating frequency, the phase of the power amplifier 101 can be improved. Features and acts as a harmonic network of the power amplifier 101.

In the adjustable LC network 102, the adjustable capacitor network includes more than two capacitors and more than one switch, and the capacitance value of the access circuit of the adjustable capacitor network is controlled by changing the configuration of the switches in the adjustable capacitor network. Specifically, the adjustable capacitor network can be composed of multiple groups of capacitors with switches. As shown in Figure 2, each capacitor in the adjustable capacitor network has an independent switch. By changing the configuration of these switches (on/off ) Can control the capacitance value of the adjustable capacitance network access circuit. Optionally, in some cases, in order to reduce the number of switches, the adjustable capacitance network may be composed of a fixed capacitance circuit part and a variable capacitance circuit part, wherein the variable capacitance circuit part is composed of more than one set of bands. The capacitance of the switch is composed. As shown in Figure 3, the adjustable capacitor network includes some capacitors with fixed access circuits and some capacitors with switches, that is, the fixed capacitor circuit part and the variable capacitor circuit part. This structure can guarantee the adjustable capacitor The network can be adjusted within a certain capacitance value range, and can effectively reduce the number of switching components, which is beneficial to improve the integration of the power amplifier module.

In the adjustable LC network 102, the adjustable inductance network includes more than two inductors and more than one switch, and the inductance value of the circuit connected to the adjustable inductance network is controlled by changing the configuration of the switches in the adjustable inductance network. Specifically, the adjustable inductance network can be composed of multiple groups of inductors with switches. As shown in Figure 4, each inductor in the adjustable inductance network has an independent switch. By changing the configuration of these switches (on/off ) Can control the inductance value of the adjustable inductance network connected to the circuit. Optionally, in some cases, in order to reduce the number of switches, the adjustable inductance network may be composed of a fixed inductance circuit part and a variable inductance circuit part, wherein the variable inductance circuit part is composed of more than one set The inductance with switch is composed. As shown in Figure 5, the adjustable inductance network contains part of the inductance of the fixed access circuit and part of the inductance with switches, that is, the fixed inductance circuit part and the variable inductance circuit part. This structure can guarantee the adjustable The inductance network can be adjusted within a certain inductance value range, and can effectively reduce the number of switching components, which is beneficial to improve the integration of the power amplifier module.

Exemplarily, in some embodiments, as shown in FIG. 6, the adjustable LC network 102 is composed of an adjustable capacitor network and an adjustable inductance network, wherein the adjustable capacitor network is composed of multiple groups of capacitors with switches. The adjustable inductance network is composed of multiple groups of inductors with switches. By changing the configuration of the switches on the adjustable capacitor network and the adjustable inductance network, the capacitance value and inductance value of the adjustable LC network 102 connected to the circuit can be realized within a certain range Controllable and adjustable.

It is understandable that in some application scenarios, the power amplifier needs to switch between different operating frequencies. In this process, the parasitic capacitance changes with the operating frequency and power, and the generation of harmonics is also related to the operating frequency. . Based on this, in the embodiment of the present application, the capacitance value and inductance value of the adjustable LC network 102 that should be connected to the circuit can be set in advance for different operating frequencies of the power amplifier, so that when necessary, the adjustable frequency can be changed according to different operating frequencies. The capacitance value and the inductance value of the LC network 102 are adjusted so that the adjustable LC network 102 can play a role of phase compensation and harmonic filtering in the power amplifier module.

Specifically, the corresponding relationship between the different operating frequencies of the power amplifier and the capacitance value and inductance value of the adjustable LC network 102 is predetermined, which is recorded as the preset compensation relationship in this embodiment. For example, the power amplifier works at two operating frequencies f ₁ and f _2. Through pre-measurement, it is determined that the capacitance values of the adjustable LC network 102 correspond to C _f1 and C _f2 , and the inductance values correspond to L _f1 and L respectively. _f2 , can realize the phase compensation and harmonic filtering of the power amplifier, then the preset compensation relationship in this application scenario can be recorded as:

f ₁ -C _f1 -L _f1 ;

f ₂ -C _f2 -L _f2 ;

Therefore, under different operating frequencies f _n of the power amplifier, the capacitance value corresponding to the adjustable LC network 102 is C _fn , the inductance value is L _fn , and the preset compensation relationship is denoted as: f _n -C _fn -L _fn .

Based on the foregoing preset compensation relationship, the power amplifier module performs the following steps during operation:

S11. Obtain the current operating frequency of the power amplifier; S12. Determine the target capacitance value and target inductance value corresponding to the current operating frequency according to a preset compensation relationship; S13. Change the configuration of the switches in the adjustable LC network 102 The tunable LC network 102 is connected to the circuit with the target capacitance value and the target inductance value to realize the phase compensation and harmonic filtering of the power amplifier at the same time.

For the above steps S11-S13, assuming that the acquired current operating frequency of the power amplifier is f ₁ , it can be determined that the current operating frequency f ₁ corresponds to the preset compensation relationship "f ₁ -C _f1 -L _{f1 "} The target capacitance value and the target inductance value are C _f1 and L _{f1 respectively} . Therefore, the switch configuration of the adjustable capacitor network in the adjustable LC network 102 and the switch configuration of the adjustable inductance network can be changed, so that the adjustable capacitor network is connected The capacitance value of the _{input circuit is C f1} , and the capacitance value of the adjustable inductance network access circuit is L _f1 . Since the preset compensation relationship "f ₁ -C _f1 -L _f1 "is measured under the premise that the adjustable LC network 102 can realize the phase compensation and harmonic filtering of the power amplifier, therefore, in the actual application process , at _a target capacitance value and a target value of the operating frequency f modulated inductance of C _f1 and L _f1, phase compensation can also play necessarily harmonic filter and the effectiveness of the working frequency f ₁ of the power amplifier.

Similarly, assuming that the acquired current operating frequency of the power amplifier is f ₂ , the target capacitance value corresponding to the current operating frequency f ₂ can be determined through the preset compensation relationship "f ₂ -C _f2 -L _{f2 "} And the target inductance values are C _f2 and L _{f2 respectively} . Therefore, the switch configuration of the adjustable capacitor network in the adjustable LC network 102 and the switch configuration of the adjustable inductance network can be specifically changed, so that the adjustable capacitor network is connected to the capacitance of the circuit The value is C _f2 , and the capacitance value of the adjustable inductance network access circuit is L _f2 , which can also perform phase compensation and harmonic filtering for the power amplifier at the _{operating frequency f 2.}

Preferably, in some embodiments, the power amplifier module may further include a controller configured to perform the above steps S11-S13, that is, to obtain the current operating frequency of the power amplifier, and determine the relationship with the power amplifier according to the preset compensation relationship. According to the target capacitance value and target inductance value corresponding to the current operating frequency, the configuration of the switch in the adjustable LC network 102 is changed so that the adjustable LC network 102 is connected to the circuit with the target capacitance value and target inductance value. By independently controlling and executing steps S11-S13 by the controller, the stability of changing the configuration of the switches in the adjustable LC network 102 when the power amplifier module switches the operating frequency can be improved, and the response speed and robustness of the power amplifier module can be improved.

In some embodiments, the preset compensation relationship is predetermined through the following steps:

S21: Determine each operating frequency of the power amplifier;

S22. When the power amplifier is at different operating frequencies, determine the capacitance value that the adjustable LC network 102 should be connected to the circuit to compensate the influence of the parasitic capacitance on the phase characteristics, and obtain the respective operating frequencies of the power amplifier and the The corresponding relationship of the capacitance value of the adjustable LC network 102;

S23. When the power amplifier is at different operating frequencies, the determined capacitance values of the adjustable LC network 102 that should be connected to the circuit are substituted into the preset first formula to calculate, to obtain the adjustable LC network 102 should be connected to the inductance value of the circuit that can resonate at the resonant frequency to filter out harmonics, and obtain the corresponding relationship between each operating frequency of the power amplifier and the inductance value of the adjustable LC network 102.

For step S21, specifically, the working frequencies f ₁ , f ₂ ,..., F _{n of} the power amplifier may be determined first, where n is greater than or equal to 2. It is understandable that it is generally necessary to determine the possible operating frequencies of the power amplifier in the power amplifier module under a specified circuit environment. For example, if the power amplifier module is used in an antenna module, it should be considered that the antenna module is in When working in a specific application scenario, the possible working frequencies of the power amplifier are determined, and then these working frequencies are determined.

For step S22, it can be understood that, in order to measure the capacitance and inductance values corresponding to different operating frequencies, during execution, it is possible to determine the response of the adjustable LC network 102 through experiments or simulations at each operating frequency. The capacitance value of the connected circuit that compensates the influence of parasitic capacitance on the phase characteristics. For example, let the power amplifier be at the operating frequency f _{1 first} , and then determine C _f1 through simulation. In the same way, let the power amplifier be at the operating frequency f ₂ , and then determine C _f2 through simulation.

For step S23, after the capacitance value corresponding to a certain operating frequency is determined in step S22, the inductance value required for harmonics can be determined according to the determined capacitance value. Exemplarily, in a class F power amplifier, a parallel resonant network with a high quality factor resonates at the resonant frequency, increasing an infinite impedance at the fundamental frequency, and at other harmonic frequencies, the impedance of the parallel resonant network is approximately Is zero. Therefore, the inductance value in the harmonic network can be calculated by the following formula (preset the first formula):

The preset first formula is:

Wherein, f _n is the frequency of operation, 2f _n is the resonant frequency, C _fn f _n refers to the value of the variable capacitor should be connected to the circuit LC network 102, L _fn f _n means at said adjustable The LC network 102 should be connected to the inductance value of the circuit.

That is, when the power amplifier is at the working frequency f ₁ , _{substituting f 1} and C _f1 into the preset first formula, L _f1 can be obtained; when the power amplifier is at the working frequency f ₂ , _{substituting f 2} and C _f2 into the By presetting the first formula, L _f2 can be obtained. In the same way, the capacitance and inductance values of the adjustable LC network 102 at each operating frequency of the power amplifier can be obtained, so as to construct and obtain the respective operating frequencies of the power amplifier and the capacitance and inductance values of the adjustable LC network 102. The corresponding relationship of the values can be predetermined to determine the preset compensation relationship.

Preferably, in some embodiments, the power amplifier is a multi-stage power amplifier. At this time, the adjustable LC network 102 may be set at the input end of the output stage power amplifier tube in the multi-stage power amplifier, or the adjustable LC network 102 may be set at the input stage power of the multi-stage power amplifier. The output end of the amplifier tube. Exemplarily, as shown in FIG. 7, the adjustable LC network 102 may be set at the input end of the output stage power amplifier tube 103 in the multi-stage power amplifier; as shown in FIG. 8, the adjustable LC network 102 may be set In the multi-stage power amplifier, the output end of the output stage power amplifier tube 103 is output.

Further, when the power amplifier is a multi-stage power amplifier, the adjustable LC network 102 may also include more than two sets of adjustable capacitor networks and adjustable inductance networks, in the multi-stage power amplifier, more than two power A set of adjustable capacitor network and adjustable inductance network are respectively arranged at the input end or output end of the amplifying tube. Exemplarily, as shown in FIG. 9, a set of adjustable capacitor network and adjustable inductance network 102-1 is arranged at the output end of the input stage power amplifier tube 104, and another set of adjustable capacitor network and adjustable inductance network 102- 2 is set at the output end of the output stage power amplifier tube 103.

Preferably, in some embodiments, as shown in FIG. 10, the power amplifier module further includes an output impedance matching network electrically connected to the output end of the power amplifier, so as to match the impedance of the load line that may be connected. Demand.

Preferably, the power amplifier module provided in the present application can also be structured for class F power amplifiers. As shown in Figure 11, in the application of the class F power amplifier, a set of adjustable capacitor network and adjustable inductance network 102-3 are set in the input end of the output stage power amplifier, which presents a second-order low impedance, and in the output stage A set of adjustable capacitor network and adjustable inductance network 102-4 are arranged at the output end of the power amplifier, which presents a third-order high impedance. In the same way, the power amplifier module provided in the present application can also be structurally extended for the inverse class F power amplifier. Refer to Figure 11 for the expanded circuit structure. In the application of the inverse class F power amplifier, a set of adjustable capacitor networks and adjustable inductance networks are set at the input end of the output stage power amplifier, presenting a third-order low impedance, and in the output stage A set of adjustable capacitor network and adjustable inductance network are set in the output end of the power amplifier, presenting a second-order high impedance.

It can be seen from the content of each of the foregoing embodiments that a power amplifier module related to the present application can realize the phase compensation and harmonic filtering of the power amplifier at the same time through an adjustable LC network 102, which is similar to the prior art for phase compensation and harmonic filtering. The requirements for filtering are different one by one. The power amplifier module of the present application adopts a smaller number of circuit devices and a smaller footprint, which is beneficial to improve the integration and miniaturization of the power amplifier module.

It should be understood that the size of the sequence number of each step in the foregoing embodiment does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

On the other hand, as shown in FIG. 12, the present application also relates to a wireless device, which includes a load line and the power amplifier module described in any of the above embodiments with an output terminal connected to the load line. In the wireless device, the power amplifier module at least includes a rate amplifier, and an adjustable LC network connected to the input end of the power amplifier.

Wherein, the power amplifier module may perform the following steps during operation: obtain the current operating frequency of the power amplifier, determine the target capacitance value and target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and change the The configuration of the switches in the tuned LC network makes the tuneable LC network connect to the circuit with the target capacitance value and target inductance value to realize phase compensation and harmonic filtering of the power amplifier at the same time, and the preset compensation The relationship records the corresponding relationship between the operating frequency of the power amplifier and the capacitance value and inductance value of the adjustable LC network.

It can be understood that the power amplifier module in the wireless device is not limited to any one of the power amplifier modules mentioned in the embodiments of this application. Therefore, the technical features and expected technical effects of the power amplifier modules described in the above embodiments , The wireless device is also available, so I won’t repeat it here.

Preferably, as shown in FIG. 13, the wireless device may include more than two load lines, and it may also include a switch network 105 configured to electrically connect one of the two load lines to the The output terminal of the power amplifier module.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above functional units and modules is used as an example. In practical applications, the above functions can be allocated to different functional units and modules as needed. Module completion, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

A power amplifier module, characterized by comprising a power amplifier, and an adjustable LC network connected to the input end of the power amplifier;

The adjustable LC network includes an adjustable capacitance network and an adjustable inductance network;

The adjustable capacitor network includes more than two capacitors and more than one switch, and the capacitance value of the access circuit of the adjustable capacitor network is controlled by changing the configuration of the switches in the adjustable capacitor network;

The adjustable inductance network includes more than two inductors and more than one switch, and the inductance value of the circuit connected to the adjustable inductance network is controlled by changing the configuration of the switches in the adjustable inductance network.
The power amplifier module according to claim 1, wherein the power amplifier module executes the following steps during operation: acquiring the current operating frequency of the power amplifier, and determining the corresponding to the current operating frequency according to a preset compensation relationship Target capacitance value and target inductance value, change the configuration of the switches in the adjustable LC network so that the adjustable LC network is connected to the circuit with the target capacitance value and target inductance value, and the phase of the power amplifier is realized at the same time Compensation and harmonic filtering, the preset compensation relationship records the corresponding relationship between the operating frequency of the power amplifier and the capacitance value and inductance value of the adjustable LC network.
The power amplifier module according to claim 2, wherein the preset compensation relationship is predetermined through the following steps:

Determining each operating frequency of the power amplifier;

When the power amplifier is at different operating frequencies, determine the capacitance value that the adjustable LC network should be connected to the circuit to compensate for the influence of the parasitic capacitance on the phase characteristics, and obtain each operating frequency of the power amplifier and the adjustable LC Correspondence of the capacitance value of the network;

When the power amplifier is at different operating frequencies, the determined capacitance values of the circuit that the adjustable LC network should be connected to are substituted into the preset first formula to calculate, and it is obtained that the adjustable LC network should be connected to The inductance value of the circuit that can resonate at the resonant frequency to filter out the harmonics, and obtain the corresponding relationship between each operating frequency of the power amplifier and the inductance value of the adjustable LC network;

The preset first formula is:

Wherein, f n is the frequency of operation, 2f n is the resonant frequency, C fn f n refers to the value of the adjustable capacitance of the LC circuit should be connected to the network, L fn f n means at said tunable LC The network should be connected to the inductance value of the circuit.
The power amplifier module according to claim 1, further comprising a controller;

The controller is configured to: obtain the current operating frequency of the power amplifier, determine a target capacitance value and a target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and change the configuration of switches in the adjustable LC network The adjustable LC network is connected to the circuit with the target capacitance value and target inductance value.
The power amplifier module according to claim 1, wherein the adjustable capacitor network is composed of a fixed capacitor circuit part and a variable capacitor circuit part, wherein the variable capacitor circuit part is composed of more than one set of switches with switches. The capacitor is composed.
The power amplifier module according to claim 1, wherein the adjustable inductance network is composed of a fixed inductance circuit part and a variable inductance circuit part, wherein the variable inductance circuit part is composed of more than one set of Inductor composition with switch.
The power amplifier module according to claim 1, wherein the power amplifier is a multi-stage power amplifier;

The adjustable LC network is arranged at the input end of the output stage power amplifier tube in the multi-stage power amplifier, or the adjustable LC network is arranged at the output end of the input stage power amplifier tube in the multi-stage power amplifier.
The power amplifier module according to claim 1, wherein the power amplifier is a multi-stage power amplifier;

The adjustable LC network includes more than two sets of adjustable capacitor networks and adjustable inductance networks. In the multi-stage power amplifier, a set of adjustable capacitor networks and adjustable inductance networks are respectively provided at the input or output ends of the two or more power amplifier tubes. Adjust the inductance network.
The power amplifier module according to any one of claims 1 to 8, further comprising an output impedance matching network electrically connected with the output terminal of the power amplifier.
A wireless device, characterized by comprising a load line and a power amplifier module whose output terminal is connected to the load line;

The power amplifier module includes a power amplifier, and an adjustable LC network connected to the input end of the power amplifier;

The adjustable LC network includes an adjustable capacitance network and an adjustable inductance network;

The adjustable capacitor network includes more than two capacitors and more than one switch, and the capacitance value of the access circuit of the adjustable capacitor network is controlled by changing the configuration of the switches in the adjustable capacitor network;

The adjustable inductance network includes more than two inductors and more than one switch, and the inductance value of the circuit connected to the adjustable inductance network is controlled by changing the configuration of the switches in the adjustable inductance network.
The wireless device according to claim 10, wherein the power amplifier module performs the following steps during operation: acquiring the current operating frequency of the power amplifier, and determining the target corresponding to the current operating frequency according to a preset compensation relationship Capacitance value and target inductance value, change the configuration of the switch in the adjustable LC network so that the adjustable LC network is connected to the circuit with the target capacitance value and target inductance value, and realize the phase compensation of the power amplifier at the same time And harmonic filtering, the preset compensation relationship records the corresponding relationship between the working frequency of the power amplifier and the capacitance value and inductance value of the adjustable LC network.
The wireless device according to claim 11, wherein the preset compensation relationship is predetermined through the following steps:

Determining each operating frequency of the power amplifier;

When the power amplifier is at different operating frequencies, determine the capacitance value that the adjustable LC network should be connected to the circuit to compensate for the influence of the parasitic capacitance on the phase characteristics, and obtain each operating frequency of the power amplifier and the adjustable LC Correspondence of the capacitance value of the network;

When the power amplifier is at different operating frequencies, the determined capacitance values of the circuit that the adjustable LC network should be connected to are substituted into the preset first formula to calculate, and it is obtained that the adjustable LC network should be connected to The inductance value of the circuit that can resonate at the resonant frequency to filter out the harmonics, and obtain the corresponding relationship between each operating frequency of the power amplifier and the inductance value of the adjustable LC network;

The preset first formula is:

Wherein, f n is the frequency of operation, 2f n is the resonant frequency, C fn f n refers to the value of the adjustable capacitance of the LC circuit should be connected to the network, L fn f n means at said tunable LC The network should be connected to the inductance value of the circuit.
The wireless device according to claim 10, wherein the power amplifier module further comprises a controller;

The controller is configured to: obtain the current operating frequency of the power amplifier, determine a target capacitance value and a target inductance value corresponding to the current operating frequency according to a preset compensation relationship, and change the configuration of switches in the adjustable LC network The adjustable LC network is connected to the circuit with the target capacitance value and target inductance value.
The wireless device according to claim 10, wherein the adjustable capacitance network is composed of a fixed capacitance circuit part and a variable capacitance circuit part, wherein the variable capacitance circuit part is composed of more than one set of switches with switches. Capacitor composition.
The wireless device according to claim 10, wherein the adjustable inductance network is composed of a fixed inductance circuit part and a variable inductance circuit part, wherein the variable inductance circuit part is composed of more than one set of bands. The inductance of the switch is composed.
The wireless device according to claim 10, wherein the power amplifier is a multi-stage power amplifier;

The adjustable LC network is arranged at the input end of the output stage power amplifier tube in the multi-stage power amplifier, or the adjustable LC network is arranged at the output end of the input stage power amplifier tube in the multi-stage power amplifier.
The wireless device according to claim 10, wherein the power amplifier is a multi-stage power amplifier;

The adjustable LC network includes more than two sets of adjustable capacitor networks and adjustable inductance networks. In the multi-stage power amplifier, a set of adjustable capacitor networks and adjustable inductance networks are respectively provided at the input or output ends of the two or more power amplifier tubes. Adjust the inductance network.
The wireless device according to any one of claims 10 to 17, wherein the power amplifier module further comprises an output impedance matching network in electrical communication with the output terminal of the power amplifier.