WO2023046035A1

WO2023046035A1 - Power amplifier, power amplification method, and electronic device

Info

Publication number: WO2023046035A1
Application number: PCT/CN2022/120657
Authority: WO
Inventors: 陈化璋; 崔晓俊; 侯婷; 安晋元
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-09-23
Filing date: 2022-09-22
Publication date: 2023-03-30
Also published as: CN115913123A

Abstract

Embodiments of the present invention relates to the field of communications, and disclosed are a power amplifier, a power amplification method, and an electronic device. The power amplifier comprises a power amplification unit, an input matching unit, a power distribution unit, an output matching unit, and a power combination unit; the power amplification unit at least comprises a first Doherty amplification unit and a second Doherty amplification unit; the power distribution unit at least comprises a first distribution unit and a second distribution unit; a first peak amplification unit and a second peak amplification unit amplify an electrical signal provided by the first distribution unit; a first carrier amplification unit and a second carrier amplification unit amplify an electrical signal provided by the second distribution unit; and the power combination unit is configured to combine and output electrical signals amplified by the power amplification unit.

Description

Power amplifier, power amplification method and electronic device

Cross References to Related Applications

This application is based on the Chinese patent application CN202111114404.X filed on September 23, 2021 with the title of "Power Amplifier, Power Amplification Method and Electronic Equipment", and claims the priority of this patent application, and the disclosed content is incorporated by reference All are incorporated into this application.

technical field

Embodiments of the present invention relate to the communication field, and in particular, to a power amplifier, a power amplification method, and electronic equipment.

Background technique

The remote radio unit (Remote Radio Unit, RRU) or active antenna unit (Active Radio Unit, AAU) is the core subsystem in the wireless base station, which converts the baseband digital signal into radio waves after processing and transmits them through the antenna; At the same time, it receives the information sent by the user terminal and transmits it to the core network to complete information interaction. The RF power amplifier (Radio Frequency Power Amplifier, RFPA) is located at the end of the transmission channel. It amplifies the power of the modulated RF signal to obtain a large enough RF output power, and then feeds it to the antenna for radiation.

With the advent of the fifth-generation communication technology era, there are more and more high-power and large-bandwidth application scenarios. The signal bandwidth of RF power amplifiers increases from tens of MHz to 200MHz and 400MHz. The traditional Doherty (Doherty ) When the circuit structure is working, the two power amplifiers do not work in turn, but the carrier power amplifier works all the time, and the peak power amplifier will only work when it reaches the set peak value, and the Doherty gain will be reduced, the bandwidth will be reduced, and the sensitivity will be higher, and the peak power amplifier will Restricting the gain of the final power amplifier, the impedance transformation in the Doherty structure and the narrowband characteristics of the 1/4 wavelength conversion line determine that the Doherty structure is a narrowband system with a small bandwidth, especially in high-efficiency applications with high power or large bandwidth. In the traditional Doherty circuit design, after two Doherty circuits are combined for power, although the power is increased, the supported application bandwidth will decrease.

Therefore, how to increase the signal bandwidth supported by the power amplifier without reducing the efficiency, or how to improve the efficiency of the power amplifier with a larger bandwidth as much as possible, has become an urgent problem.

Contents of the invention

Embodiments of the present invention provide a power amplifier, a power amplification method, an electronic device, and a computer-readable storage medium. By constructing a novel Doherty power amplifier circuit, the problem of the application bandwidth of the Doherty power amplifier circuit in the traditional design is solved. After the increase, the key indicators such as efficiency and linearity decrease.

An embodiment of the present invention provides a power amplifier, including: a power distribution unit, an input matching unit, a power amplification unit, an output matching unit, and a power combining unit; the output end of the power distribution unit is connected to the input end of the input matching unit, and the input matching unit The output end of the power amplifying unit is connected to the input end of the power amplifying unit, the output end of the power amplifying unit is connected to the input end of the output matching unit, and the output end of the output matching unit is connected to the input end of the power combining unit; the power amplifying unit includes at least the first Doherty The amplifying unit and the second Doherty amplifying unit, the first Doherty amplifying unit includes a first peak amplifying unit and a first carrier amplifying unit, and the second Doherty amplifying unit includes a second peak amplifying unit and a second The carrier amplification unit; the power distribution unit includes at least a first distribution unit and a second distribution unit; the first distribution unit is configured to provide electrical signals for the second distribution unit, the first peak amplification unit and the second peak amplification unit; the second distribution The unit is set to provide electrical signals for the first carrier amplifying unit and the second carrier amplifying unit; the first peak amplifying unit and the second peak amplifying unit are set to amplify the electrical signal provided by the first distribution unit; the first carrier amplifying unit and The second carrier amplifying unit is set to amplify the electrical signal provided by the second distribution unit; the input matching unit is set to complete the input impedance matching of the power amplifying unit according to the power distribution result of the power distribution unit; the output matching unit is set to complete the power distribution according to the power distribution result The power distribution result of the unit completes the output impedance matching of the power amplifying unit; the power combining unit is set to synthesize and output the electrical signal amplified by the power amplifying unit.

An embodiment of the present invention also provides a power amplification method, including: acquiring an electrical signal to be amplified; and amplifying the electrical signal to be amplified by the above-mentioned power amplifier.

An embodiment of the present invention also provides an electronic device, including the above-mentioned power amplifier.

Description of drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.

Fig. 1 is the synthesizing principle block diagram of two-way Doherty power amplifier in the traditional technology;

Fig. 2 is a schematic structural diagram of a power amplifier in an embodiment of the present invention;

3 is a schematic structural diagram of another power amplifier circuit according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another power amplifier circuit according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an electronic device according to another embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided for readers to better understand the embodiments of the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the embodiments of the present invention can be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present invention, and the various embodiments can be combined and referred to each other on the premise of no contradiction.

The principle block diagram of a traditional Doherty circuit is shown in FIG. 1 , including: a power distribution unit 101 , an input matching unit 102 , a power amplification unit 103 , an output matching unit 104 and a power combining unit 105 . Wherein, the output end of the power distribution unit 101 is connected to the input end of the power amplifying unit 103 via the input matching unit 102 , and the output end of the power amplifying unit 103 is connected to the input end of the power combining unit 105 via the output matching unit 104 . Specifically, the power distribution unit 101 includes at least three power division structures, a power division network, a Doherty power division network 1 and a Doherty power division network 2; the power amplification unit 103 includes at least a first carrier amplification unit and a second carrier amplification unit, The first peak amplifying unit and the second peak amplifying unit; the power combining unit 105 includes at least three combining structures, Doherty combining network 1 , Doherty combining network 2 and combining network. Among them, the power distribution network is used to distribute the power of the input electrical signal, and provide the electrical signal with power distribution completed for Doherty power distribution network 1 and Doherty power distribution network 2; Doherty power distribution network 1 and Doherty power distribution network 2 pair power distribution The power of the electrical signal transmitted by the network is further distributed, the input matching unit and the output matching unit are set to complete the impedance matching of the input impedance and the output impedance according to the power distribution result of the power distribution unit 101, the first carrier amplifying unit and the first peak amplifying After the unit obtains the electrical signal with power distribution in Doherty power division network 1 through input matching 1 and input matching 2 respectively, it amplifies the power of the electrical signal, and then inputs the amplified electrical signal to the Doherty combiner network 1 performs power synthesis. Similarly, after the second carrier amplifier unit and the second peak amplifier unit obtain the electrical signal with power distribution in the Doherty power division network 2, the power of the electrical signal is amplified, and then the amplified The electrical signals of the two Doherty combining networks are input to the Doherty combining network 2 for power combination; finally, the power of the electrical signals output by the two Doherty combining networks is combined and output through the combining network.

Although the traditional Doherty circuit structure can achieve high efficiency by making each amplifier achieve the maximum output efficiency, it also has its insurmountable disadvantages, that is, the gain is reduced and the supported application bandwidth is further reduced.

In order to solve the above problems, the Doherty power amplifier described in the embodiment of the present invention changes the power division structure before the carrier and peak input matching on the basis of the traditional Doherty circuit, and the first carrier amplifying unit and the second carrier amplifying unit in the original two Doherty power combining structures A peak amplifying unit adopts the same power division network to realize power distribution, and the second carrier and the second peak amplifying unit adopt the same power division network to realize power distribution. The power distribution mode is adjusted to the first carrier amplifying unit and the second carrier amplifying unit Use the same power division network to realize power distribution, the first peak amplifying unit and the second peak amplifying unit use the same power division network to realize power distribution, so as to reduce the working status of the first carrier amplifying unit and the second carrier amplifying unit The difference improves the consistency of the working status of the two carrier power amplifiers and improves the broadband characteristics.

In order to solve the above problems, an embodiment of the present invention provides a power amplifier, including: a power distribution unit, an input matching unit, a power amplification unit, an output matching unit, and a power combining unit; the output end of the power distribution unit is connected to the input matching unit The input end of the input matching unit is connected to the input end of the power amplifying unit, the output end of the power amplifying unit is connected to the input end of the output matching unit, and the output end of the output matching unit is connected to the input end of the power combining unit; the power amplifying unit is at least It includes a first Doherty amplifying unit and a second Doherty amplifying unit, the first Doherty amplifying unit includes a first peak amplifying unit and a first carrier amplifying unit, and the second Doherty amplifying unit includes a first Two peak amplifying units and a second carrier amplifying unit; the power distribution unit includes at least a first distribution unit and a second distribution unit; the first distribution unit is set to be the second distribution unit, the first peak amplifying unit and the second peak amplifying unit respectively and the first distribution unit to provide electrical signals; the second distribution unit is configured to provide electrical signals to the first carrier amplifying unit and the second carrier amplifying unit; the first peak amplifying unit and the second peak amplifying unit are configured to provide the first distribution unit amplify the electric signal; the first carrier amplifying unit and the second carrier amplifying unit are set to amplify the electric signal provided by the second distribution unit; the input matching unit is set to complete the power amplifying unit according to the power distribution result of the power distribution unit The input impedance is matched; the output matching unit is set to complete the output impedance matching of the power amplifying unit according to the power distribution result of the power distributing unit; the power combining unit is set to synthesize and output the electrical signal amplified by the power amplifying unit. In this process, the different carrier power amplifying units of the two Doherty power amplifying units are distributed through the same power distribution unit, so that the working states of different carrier power amplifying units are the same, and the amplitude and phase at different frequency points have good Consistency, while ensuring efficiency, increases the supported bandwidth.

In the power amplifier provided by the embodiment of the present invention, by connecting the carrier amplifying units of the two Doherty power amplifying units in the power amplifying unit to the same power distributing unit, the electrical signal provided by the same power distributing unit is amplified, so that the two The working states of the two carrier amplifier units are as consistent as possible. Compared with the traditional Doherty circuit design, the consistency of the two carrier amplifier units is greatly improved, and the supported bandwidth is improved, which solves the problem in the application of the traditional Doherty circuit design. After the bandwidth is increased, the efficiency and linearity indicators decrease, or under the same bandwidth conditions, the efficiency and linearity indicators are significantly improved.

The design details of the power amplifier in this embodiment are described in detail below. The following content is only the implementation details provided for easy understanding, and is not necessary to realize this solution. The structure of the power amplifier is shown in Figure 2, including: power distribution unit 201 , an input matching unit 202 , a power amplifying unit 203 , an output matching unit 204 and a power combining unit 205 . The output of the power distribution unit 201 is connected to the input of the input matching unit 202, the output of the input matching unit 202 is connected to the input of the power amplification unit 203, the output of the power amplification unit 203 is connected to the input of the output matching unit 204, and the output matching The output terminal of the unit 204 is connected to the input terminal of the power combining unit 205 .

Specifically, after the electrical signal that requires power amplification is input to the power distribution unit 201, the power of the electrical signal is distributed by the power distribution unit 201, and the input matching 1, input matching 2, input matching 3 and input matching in the input matching unit 202 Input matching 4 and output matching 1, output matching 2, output matching 3 and output matching 4 in the output matching unit 204 respectively complete the impedance matching of the input impedance and the output impedance according to the power distribution result of the power distribution unit 201, and then the power distribution unit 201 The electrical signal with power distribution is transmitted to the power amplification unit 203 through the input matching unit 202, and the power amplification unit 203 passes the first carrier wave in the two Doherty power amplification units contained in the power amplifier according to the power distribution result of the power distribution unit 201 The amplifying unit and the second carrier amplifying unit amplify the electrical signal provided by the second power distribution unit, the first peak amplifying unit and the second peak amplifying unit amplify the electrical signal provided by the first power distributing unit, and the amplified electrical signal is The signal is transmitted to the power combining unit 205 through the output matching unit 204 , and the power amplified electrical signal is combined by the power combining unit 205 and then output.

In one example, the power distribution unit in the power amplifier is a microstrip circuit or an integrated device. By adjusting the specific type of the selected power distribution unit according to the actual situation, the practicability of the new Doherty power amplification architecture is guaranteed, and the application range of the new Doherty power amplification architecture is improved.

In another example, the input matching unit and the output matching unit in the power amplifier include: a microstrip circuit, a capacitor and an inductor; the microstrip circuit is configured to adjust the length and width of the microstrip line, the capacitance value of the capacitor and the The inductance value of the inductor completes the impedance matching. By combining the selected power amplifier module, the input matching network and the output matching network of the power amplifier are formed by using the microstrip circuit, the capacitive device and the inductive device, and the input matching network and the output matching network are respectively used as input The matching unit and the output matching unit can accurately and efficiently complete the impedance matching of the input impedance and output impedance during the power amplification process by adjusting the length and width of the microstrip line, the capacitance value during the capacitance period, and the inductance value of the inductance device, so as to meet the requirements of the power amplifier. Performance requirements in terms of gain, power and efficiency performance over the operating frequency band.

In another example, the power combining unit includes: a first combining unit and a second combining unit and a third combining unit connected to the input end of the first combining unit; The output of the unit is synthesized and output; the second synthesis unit is set to synthesize and output the output of the first carrier amplification unit and the first peak amplification unit; the third synthesis unit is set to synthesize the output of the second carrier amplification unit and the second peak amplification unit output for composite output.

For example, a schematic structural diagram of a power amplifier is shown in Figure 3, wherein the part 301 marked with a dotted line in Figure 3 is the power distribution unit in the power amplifier, and the power distribution unit 301 includes: a first distribution unit and a second distribution unit unit; the input matching unit 302 includes: input matching 1, input matching 2, input matching 3 and input matching 4; the power amplifying unit 303 includes at least a first Doherty amplifying unit 3031 and a second Doherty amplifying unit 3032, wherein the first Doherty amplifying Unit 3031 includes a first peak amplifying unit and a first carrier amplifying unit, and the second Doherty amplifying unit 3032 includes a second peak amplifying unit and a second carrier amplifying unit; output matching unit 304 includes: output matching 1, output matching 2, output matching 3 and output matching 4; the power combining unit 305 includes the first combining unit and the second combining unit and the third combining unit connected to the input end of the first combining unit; the first combining unit is set to the second combining unit and the third combining unit The power of the electrical signal output by the unit is synthesized and output; the second synthesis unit is configured to synthesize the power of the electrical signal amplified by the first carrier amplification unit and the first peak amplification unit; the third synthesis unit is configured to amplify the second carrier The power of the electric signal amplified by the unit and the second peak amplifying unit is synthesized; in addition, the power amplifier also includes an input match connected to the input end of each amplifying unit and an output match connected to the output end of each amplifying unit.

In the process of amplifying the power of the electrical signal, the first distribution unit first distributes the power of the input electrical signal, and provides the first peak amplifying unit, the second peak amplifying unit and the second distribution unit with a power-distributed electrical signal ; The second distribution unit performs secondary power distribution on the electric signal according to the received electric signal, and provides the electric signal with power distribution for the first carrier amplification unit and the second carrier amplification unit; after the distribution unit completes the power distribution, input The matching unit and the output matching unit complete impedance matching according to the power distribution results of the connected amplifying units; then the first peak amplifying unit and the second peak amplifying unit perform power amplification on the electrical signal input by the first distribution unit through the input matching unit; the first The carrier amplifying unit and the second carrier amplifying unit amplify the power of the electrical signal input by the second distribution unit through the input matching unit; the first carrier amplifying unit and the first peak amplifying unit transmit the amplified electrical signal to the second distribution unit through the output matching unit The second synthesis unit performs power synthesis, the second carrier amplification unit and the second peak amplification unit transmit the amplified electrical signal to the third synthesis unit through the output matching unit for power synthesis, and then the second synthesis unit is transmitted through the first synthesis unit The power of the electrical signal combined with the third combining unit is combined and output. Power allocation is performed for the two carrier amplifying units through the second allocation unit, so that the working states of different carrier amplifying units in the two Doherty amplifying units in the power amplifying unit are as consistent as possible, and the amplitude and phase at different frequency points have good consistency , while ensuring efficiency, increase the supported bandwidth.

In another example, the power amplifier further includes: a third distribution unit, the first distribution unit is configured to provide electrical signals to the second distribution unit and the third distribution unit respectively; the third distribution unit is configured to be the first peak amplifying unit respectively and the second peak amplifying unit provides the electrical signal. The power amplifying unit at least includes a first Doherty amplifying unit and a second Doherty amplifying unit, the first Doherty amplifying unit includes a first peak amplifying unit and a first carrier amplifying unit, and the second Doherty amplifying unit The amplifying unit includes a second peak amplifying unit and a second carrier amplifying unit; wherein, the first carrier amplifying unit and the second carrier amplifying unit are configured to amplify the electrical signal provided by the second distribution unit, and the first peak amplifying unit and the second carrier amplifying unit The peak amplifying unit is configured to amplify the electrical signal provided by the third distributing unit.

Another power amplifier circuit structure provided by the embodiment of the present invention is shown in Figure 4, wherein the part 401 marked with a dotted line is the power distribution unit in the power amplifier, including: the first distribution unit and the first distribution unit output The second distribution unit and the third distribution unit connected at the end, the first distribution unit is configured to distribute the input electrical signal, and is configured to provide the second distribution unit and the third distribution unit with a power-distributed electrical signal, the third distribution unit The unit is configured to provide a power-allocated electrical signal to the first peak amplifying unit and the second peak amplifying unit, and the second distributing unit is configured to provide a power-allocated electrical signal to the first carrier amplifying unit and the second carrier amplifying unit, and the input The structure and connection relationship of the matching unit 402, the power amplifying unit 403, the output matching unit 404 and the power combining unit 405 are the same as those of the input matching unit 302, the power amplifying unit 303, the output matching unit 304 and the power combining unit 305 in FIG. I won't go into details.

The part 403 marked with a dotted line is the power amplifying unit in the power amplifier, at least including: a first carrier amplifying unit, a second carrier amplifying unit, a first peak amplifying unit and a second peak amplifying unit, the first carrier amplifying unit and the second carrier amplifying unit The two-carrier amplifying unit is connected to the second distribution unit in the power distribution unit 401 through the input matching unit 402, and is configured to amplify the electrical signal provided by the second distribution unit, and the first peak amplifying unit and the second peak amplifying unit are connected to each other through the input The matching unit 402 is connected to the third distribution unit in the power distribution unit 401, and is configured to amplify the electrical signal provided by the third distribution unit; the part 405 marked with a dashed line is the power combining unit in the power amplifier , set to synthesize and output the electrical signals amplified by the power amplifying unit 403 . By distributing the power of different carrier power amplifiers included in the Doherty power amplifier through the same power distribution unit, the different carrier power amplifiers work in the same state, and then maintain good consistency in amplitude and phase at different frequency points, ensuring While improving efficiency, increase the bandwidth that can be supported.

Specifically, the first distribution unit, the second distribution unit and the third distribution unit may be composed of a power distribution network 1 , a power distribution network 2 and a power distribution network 3 respectively. Wherein, the input end of the power division network 1 receives the input electrical signal, and the output end is respectively connected to the power division network 2 and the power division network 3; the power division network 2 is connected to the first carrier amplifier unit and the second carrier amplifier unit through input matching, and the power The sub-network 3 is connected to the first peak amplifying unit and the second peak amplifying unit through input matching. The power of the electrical signal is divided into two paths in advance by the first distribution unit, and then the second distribution unit and the third distribution unit provide the peak amplification unit and the carrier amplification unit with the electrical signal of the power distribution, so that the power amplifier is in operation. Each electrical signal is transmitted independently as much as possible, avoiding the mutual influence of electrical signals between different distribution units to the greatest extent, and ensuring the quality of the electrical signal input to the carrier amplifier.

The first combining unit of the power combining unit 403 marked with a dotted line can be formed by a Doherty combining network, the second combining unit can be formed by a Doherty combining network 1, and the third combining unit can be formed by a Doherty combining network 2. Refer to FIG. 3 Or as shown in the structure of the power combining unit in FIG. 4 .

In the process of amplifying the power of the electrical signal, after receiving the input electrical signal, the electrical signal with power distribution is divided into two channels through the power division network 1 and input into the power division network 2 and the power division network 3 respectively. The network 2 then inputs the electrical signals completed by the second distribution of power into the first carrier amplifier and the second carrier amplifier through the input matching 2 and input matching 3 respectively, and the power dividing network 3 respectively passes the electrical signals completed by the second power distribution through the input matching 1 And input matching 4 input the first peak amplifier and the second peak amplifier, after the amplifying unit completes the power amplification of the electrical signal, output the electrical signal output by the first peak amplifying unit and the first carrier amplifying unit through output matching 1 and output matching 2 Input into Doherty combining network 1 for power combining, through output matching 3 and output matching 4, the electrical signals output by the second peak amplifying unit and the second carrier amplifying unit are input into Doherty combining network 2 for power combining, and then through the Doherty combining network The power of the electrical signals output by the Doherty combining network 1 and the Doherty combining network 2 is output through power synthesis.

For example, the operating bandwidth of a power amplifier with a new architecture is 1.8G ~ 2.2G Hz, and the output power is 100W. The circuit structure of its application is shown in Figure 3 or 4. However, the first carrier amplifying unit and the second carrier amplifying unit at the input end use the same power divider to realize power distribution, the first peak amplifying unit and the second peak amplifying unit use the same power divider to realize power distribution, and the output end adopts Doherty synthetic network implementation, which will lead to the final performance: the difference between the highest efficiency and the lowest efficiency at different frequency points is less than 3%, and under the same test conditions, the linearity index has an improvement of more than 2 decibels; in other words, it is equivalent to achieving 2% efficiency improvement, 2dB adjacent channel power ratio (Adjacent-Channel Power Rejection, ACPR) index improvement.

This structural design divides the different carrier power amplifiers of the two Doherty power amplifiers through the same power divider for power distribution, so that the different carrier power amplifiers work in the same state, and then have good consistency in amplitude and phase at different frequencies. The design of the new Doherty circuit structure is based on dividing the input signal into equal or unequal multi-channel signal output, and solves the problem of the reduction of key indicators such as efficiency and linearity of the Doherty power amplifier in the traditional design after the application bandwidth increases. Under certain circumstances, the supportable bandwidth is greatly improved, or in other words, under the condition of the same supported bandwidth, the efficiency and linearity index are significantly improved.

In addition, it should be noted that in FIG. 4 , three power distribution networks are used as an example for specific description, and the specific number of power distribution networks in the embodiment of the present invention is not limited. A power amplifier provided in this embodiment is composed of at least two Doherty amplifying units, each Doherty amplifying unit includes a carrier amplifying unit and a peak amplifying unit, and each carrier amplifying unit and peak amplifying unit are respectively Contains input matching network, output matching network and Doherty combining network.

For the logic units in this circuit, such as the carrier amplifier unit and the peak amplifier unit, they can be composed of carrier amplifiers and peak amplifiers respectively, and there is no limit to their number. The new Doherty power amplifier architecture provided in this embodiment can be extended Applied to a structure composed of n Doherty power amplifying units, wherein n is an integer greater than or equal to 2.

In practical applications, the power combining unit can also be a microstrip circuit or an integrated device, etc., but it does not mean that it must be a specific circuit or device. As a limitation, the scope of protection of the embodiments of the present invention is not limited by the above-mentioned embodiments, as long as the technical effect or purpose described in the embodiments of the present invention is achieved, it should be within the scope of protection.

In addition, it is worth noting that the embodiment of the present invention provides a power amplifier by taking two Doherty power amplifiers in the circuit structure as an example for illustration. In practical applications, the power amplifier may include multiple Doherty power amplifiers. And multiple power dividing networks and combining networks that constitute multiple power distribution units and power combining units. It is actually necessary to adjust the number of included power amplification units, power distribution units and power synthesis units.

In the embodiment of the present invention, the same power distribution unit is used to distribute the power for the carrier amplifying units in different Doherty amplifying units, so that the working states of the carrier amplifying units in different Doherty amplifying units can be made as identical as possible, that is, no traditional There is a problem that there are huge differences in the working states of multiple carrier power amplifiers in the architecture. This method can minimize the difference in the working state of each carrier power amplifier, which is the core of the Doherty synthesis structure and plays a key role in performance indicators such as efficiency, bandwidth, and performance. The difference is the smallest, that is, at different frequency points, the amplitude and phase The consistency is the best, so in the case of equivalent efficiency, the supportable bandwidth is greatly increased, or in other words, under the condition of the same supported bandwidth, the efficiency and linearity index are significantly improved, and no additional devices are required.

According to the above embodiments, the implementation method of the embodiment of the present invention is convenient and flexible in design, and does not increase additional hardware costs. Those skilled in the same technical field can easily implement it according to this specification, and can be widely used in the design of radio frequency power amplifiers.

An embodiment of the present invention also provides an electronic device, as shown in FIG. 5 , including at least one power amplifier as described above.

It is worth noting that the electronic device 50 provided in the embodiment of the present invention includes at least one power amplifier 501 , and a plurality of power amplifiers 501 may be added correspondingly according to the actual situation, and the embodiment of the present invention does not limit the number thereof.

It is not difficult to find that the embodiment of the present invention is an embodiment of electronic equipment corresponding to the embodiment of the device, and the embodiment of the present invention can be implemented in cooperation with the embodiment of the device. The relevant technical details mentioned in the device embodiments are still valid in this embodiment, and will not be repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the device embodiment.

The above-mentioned embodiments are provided for those of ordinary skill in the art to implement and use the present invention, and those of ordinary skill in the art can make various modifications or changes to the above-mentioned embodiments without departing from the inventive concept of the embodiments of the present invention, so The protection scope of the present invention is not limited by the above-mentioned embodiments, but should conform to the maximum scope of the innovative features mentioned in the claims.

Claims

A power amplifier, including: a power distribution unit, an input matching unit, a power amplification unit, an output matching unit and a power combining unit;

The output end of the power distribution unit is connected to the input end of the input matching unit, the output end of the input matching unit is connected to the input end of the power amplification unit, and the output end of the power amplification unit is connected to the output matching unit the input end of the output matching unit, the output end of the output matching unit is connected to the input end of the power combining unit;

The power amplifying unit at least includes a first Doherty amplifying unit and a second Doherty amplifying unit, the first Doherty amplifying unit includes a first peak amplifying unit and a first carrier amplifying unit, the The second Doherty amplification unit includes a second peak amplification unit and a second carrier amplification unit; the power distribution unit includes at least a first distribution unit and a second distribution unit;

The first distribution unit is configured to provide electrical signals for the second distribution unit, the first peak amplifying unit and the second peak amplifying unit respectively; the second distribution unit is configured to provide electrical signals for the first The carrier amplifying unit and the second carrier amplifying unit provide electrical signals; the first peak amplifying unit and the second peak amplifying unit are configured to amplify the electrical signal provided by the first distribution unit; the first The carrier amplifying unit and the second carrier amplifying unit are configured to amplify the electrical signal provided by the second distribution unit;

The input matching unit is configured to complete the input impedance matching of the power amplifying unit according to the power distribution result of the power distribution unit;

The output matching unit is configured to complete the output impedance matching of the power amplifying unit according to the power distribution result of the power distribution unit;

The power combining unit is configured to combine and output the electrical signal amplified by the power amplifying unit.
The power amplifier according to claim 1, wherein the power amplifier further comprises: a third allocation unit;

The first distribution unit is configured to provide electrical signals to the second distribution unit and the third distribution unit respectively;

The third distribution unit is configured to provide electrical signals to the first peak amplifying unit and the second peak amplifying unit respectively.
The power amplifier according to claim 1, wherein the power distribution unit is a microstrip circuit or an integrated device.
The power amplifier according to any one of claims 1 to 3, wherein the input matching unit and the output matching unit comprise: a microstrip circuit, a capacitor and an inductor;

The microstrip circuit is configured to adjust the length and width of the microstrip line, the capacitance value of the capacitor and the inductance value of the inductor according to the power distribution result to complete impedance matching.
The power amplifier according to any one of claims 1 to 3, wherein the power combining unit comprises: a first combining unit and a second combining unit and a third combining unit connected to the input end of the first combining unit;

The first combining unit is configured to combine and output the outputs of the second combining unit and the third combining unit;

The second synthesizing unit is configured to synthesize and output the outputs of the first carrier amplifying unit and the first peak amplifying unit;

The third synthesizing unit is configured to synthesize and output the outputs of the second carrier amplifying unit and the second peak amplifying unit.
A power amplification method, comprising:

Obtain the electrical signal to be amplified;

The electrical signal to be amplified is amplified by using the power amplifier according to any one of claims 1-5.
An electronic device comprising the power amplifier according to any one of claims 1 to 5.