CN115913123A - Power amplifier, power amplification method and electronic device - Google Patents
Power amplifier, power amplification method and electronic device Download PDFInfo
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- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
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- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
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- H—ELECTRICITY
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- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/42—Modifications of amplifiers to extend the bandwidth
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
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Abstract
The invention relates to the field of communication, and discloses a power amplifier, a power amplification method and electronic equipment, wherein the power amplifier comprises: the power amplifier comprises a power amplifying unit, an input matching unit, a power distribution unit, an output matching unit and a power synthesis unit; the power amplifying unit includes at least a first Doherty amplifying unit and a second Doherty amplifying unit; the power distribution unit at least comprises a first distribution unit and a second distribution unit; the first peak value amplification unit and the second peak value amplification unit amplify the electric signals provided by the first distribution unit; the first carrier wave amplifying unit and the second carrier wave amplifying unit amplify the electric signals provided by the second distributing unit; the power synthesis unit is used for synthesizing and outputting the electric signals amplified by the power amplification unit, and the amplifier solves the problem that indexes such as efficiency and linearity are reduced after the bandwidth of a traditional circuit is increased by constructing a novel Doherty circuit structure.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a power amplifier, a power amplification method, and an electronic device.
Background
A Remote Radio Unit (RRU) or an Active Radio Unit (AAU) is a core subsystem in a wireless base station, and converts a baseband digital signal into a Radio wave after processing, and transmits the Radio wave through an antenna; meanwhile, the information sent by the user terminal is received and transmitted to the core network to complete information interaction. A Radio Frequency Power Amplifier (RFPA) is located at the final stage of the transmission channel, and amplifies the modulated rf signal to obtain a sufficient rf output Power, and then feeds the rf output Power to the antenna for radiation.
With the arrival of the fifth generation communication technology era, application scenarios of high power and large bandwidth are increasing, the signal bandwidth of a radio frequency power amplifier is continuously increased from dozens of MHz to 200MHz and 400MHz, when a traditional Doherty circuit structure works, two power amplifiers do not work in turn, but a carrier power amplifier works all the time, a peak power amplifier works until a set peak value, the Doherty gain is reduced, the bandwidth is reduced, the sensitivity is higher, the gain of a final power amplifier is limited by the peak power amplifier, and the impedance transformation and the narrow-band characteristic of a 1/4 wavelength conversion line in the Doherty structure determine that the Doherty structure is a narrow-band system, the bandwidth is small, and especially when high-power or high-efficiency application of large bandwidth is performed. In the conventional Doherty circuit design, after the two Doherty circuits are power-combined, although the power is increased, the problem of reduction of the supported application bandwidth is generated.
Therefore, it is an urgent problem how to increase the supportable signal bandwidth of the power amplifier without reducing the efficiency, or how to increase the efficiency of the power amplifier at a larger bandwidth as much as possible.
Disclosure of Invention
An object of the embodiments of the present invention is to solve the above problems and provide a power amplifier, a power amplifying method, an electronic device, and a computer-readable storage medium, which solve the problem of the decrease of key indexes such as efficiency and linearity after the increase of an application bandwidth of a doherty power amplifying circuit in the conventional design by constructing a novel doherty power amplifying circuit.
To achieve the above object, an embodiment of the present invention provides a power amplifier, including: the device comprises a power distribution unit, an input matching unit, a power amplification unit, an output matching unit and a power synthesis unit; the output end of the power distribution unit is connected with the input end of the input matching unit, the output end of the input matching unit is connected with the input end of the power amplification unit, the output end of the power amplification unit is connected with the input end of the output matching unit, and the output end of the output matching unit is connected with the input end of the power synthesis unit; the power amplifying unit includes at least a first doherty amplifying unit including a first peak amplifying unit and a first carrier amplifying unit and a second doherty amplifying unit including a second peak amplifying unit and a second carrier amplifying unit; the power distribution unit at least comprises a first distribution unit and a second distribution unit; the first distribution unit is used for respectively providing electric signals for the second distribution unit, the first peak amplification unit and the second peak amplification unit; the second distribution unit is used for providing the first carrier amplification unit and the second carrier amplification unit with electric signals; the first peak value amplification unit and the second peak value amplification unit are used for amplifying the electric signals provided by the first distribution unit; the first carrier amplifying unit and the second carrier amplifying unit are used for amplifying the electric signals provided by the second distributing unit; the input matching unit is used for finishing the input impedance matching of the power amplification unit according to the power distribution result of the power distribution unit; the output matching unit is used for finishing the output impedance matching of the power amplification unit according to the power distribution result of the power distribution unit; and the power synthesis unit is used for synthesizing and outputting the electric signals amplified by the power amplification unit.
In order to achieve the above object, an embodiment of the present invention further provides a power amplification method, including: acquiring an electric signal to be amplified; the power amplifier is used for amplifying the electric signal to be amplified.
To achieve the above object, an embodiment of the present invention further provides an electronic device, including the power amplifier as described above.
According to the power amplifier provided by the invention, the carrier amplifying units of the two Doherty power amplifying units in the power amplifying units are connected to the same power distribution unit, and the electric signals provided by the same power distribution unit are amplified, so that the working states of the two carrier amplifying units are as consistent as possible.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic block diagram of a two-way Doherty power amplifier in the prior art;
fig. 2 is a schematic structural diagram of a power amplifier in an embodiment of the present invention;
fig. 3 is a schematic diagram of another power amplifier circuit configuration according to an embodiment of the invention;
fig. 4 is a schematic diagram of a circuit structure of a power amplifier according to another embodiment of the invention;
fig. 5 is a schematic structural diagram of an electronic device in another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present invention. However, the claimed invention may be practiced without these specific details or with various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
The schematic block diagram of the conventional Doherty circuit is shown in fig. 1, and includes: power distribution section 101, input matching section 102, power amplification section 103, output matching section 104, and power combining section 105. The output end of the power distribution unit 101 is connected to the input end of the power amplification unit 103 through the input matching unit 102, and the output end of the power amplification unit 103 is connected to the input end of the power synthesis unit 105 through the output matching unit 104. Specifically, the power distribution unit 101 at least includes three power distribution structures, a power distribution network, a Doherty power distribution network 1 and a Doherty power distribution network 2; the power amplifying unit 103 at least includes a first carrier amplifying unit and a second carrier amplifying unit, a first peak value amplifying unit and a second peak value amplifying unit; the power combining unit 105 includes at least three combining structures, a Doherty combining network 1, a Doherty combining network 2 and a combining network. The power distribution network is used for performing power distribution on the input electric signals and providing electric signals with power distribution completion for the Doherty power distribution network 1 and the Doherty power distribution network 2; the Doherty power splitting network 1 and the Doherty power splitting network 2 further distribute the power of the electrical signals transmitted by the power splitting network, the input matching unit and the output matching unit are used for completing impedance matching of input impedance and output impedance according to the power distribution result of the power distribution unit 101, the first carrier amplification unit and the first peak amplification unit respectively obtain the electrical signals with well distributed power in the Doherty power splitting network 1 through the input matching 1 and the input matching 2, then amplify the electrical signals, respectively input the amplified electrical signals into the Doherty combining network 1 through the output matching 1 and the output matching 2 for power synthesis, and similarly, the second carrier amplification unit and the second peak amplification unit obtain the electrical signals with well distributed power in the Doherty power splitting network 2, then amplify the electrical signals, and input the amplified electrical signals into the Doherty combining network 2 for power synthesis; and finally, synthesizing and outputting the power of the electric signals output by the two Doherty combining networks through the combining network.
Although the conventional Doherty circuit structure can achieve high efficiency by maximizing the output efficiency of each amplifier, it has insurmountable disadvantages of reduced gain and further reduced supported application bandwidth.
In order to solve the above problem, in the Doherty power amplifier according to the embodiment of the present invention, a power distribution structure before carrier and peak input matching is changed on the basis of a conventional Doherty circuit, and a power distribution manner in which a first carrier amplification unit and a first peak amplification unit in an original two Doherty power combining structures implement power distribution by using the same power distribution network, and a second carrier amplification unit and a second peak amplification unit implement power distribution by using the same power distribution network is adjusted to that the first carrier amplification unit and the second carrier amplification unit implement power distribution by using the same power distribution network, and the first peak amplification unit and the second peak amplification unit implement power distribution by using the same power distribution network, so as to reduce a difference between operating states of the first carrier amplification unit and the second carrier amplification unit, improve consistency of the two carrier power amplifiers in operating states, and improve broadband characteristics.
In order to solve the above problem, an embodiment of the present invention provides a power amplifier, including: the power amplifier comprises a power distribution unit, an input matching unit, a power amplification unit, an output matching unit and a power synthesis unit; the output end of the power distribution unit is connected with the input end of the input matching unit, the output end of the input matching unit is connected with the input end of the power amplification unit, the output end of the power amplification unit is connected with the input end of the output matching unit, and the output end of the output matching unit is connected with the input end of the power synthesis unit; the power amplifying unit includes at least a first doherty amplifying unit and a second doherty amplifying unit, the first doherty amplifying unit including a first peak amplifying unit and a first carrier amplifying unit, the second doherty amplifying unit including a second peak amplifying unit and a second carrier amplifying unit; the power distribution unit at least comprises a first distribution unit and a second distribution unit; the first distribution unit is used for respectively providing electric signals for the second distribution unit, the first peak amplification unit, the second peak amplification unit and the first distribution unit; the second distribution unit is used for providing the first carrier amplification unit and the second carrier amplification unit with electric signals; the first peak value amplification unit and the second peak value amplification unit are used for amplifying the electric signals provided by the first distribution unit; the first carrier amplifying unit and the second carrier amplifying unit are used for amplifying the electric signals provided by the second distributing unit; the input matching unit is used for finishing the input impedance matching of the power amplification unit according to the power distribution result of the power distribution unit; the output matching unit is used for finishing the output impedance matching of the power amplification unit according to the power distribution result of the power distribution unit; and the power synthesis unit is used for synthesizing and outputting the electric signals amplified by the power amplification unit. In the process, different carrier power amplification units of the two Doherty power amplification units are subjected to power distribution through the same power distribution unit, so that the different carrier power amplification units have the same working state, and further have good consistency in different frequency point amplitudes and phases, and the supported bandwidth is improved while the efficiency is ensured.
The following is a detailed description of the design details of the power amplifier in this embodiment, and the following is provided only for the sake of understanding, but not necessary for implementing this solution, and the structure of the power amplifier is as shown in fig. 2, and is characterized by including: power distribution section 201, input matching section 202, power amplification section 203, output matching section 204, and power combining section 205. The output end of the power distribution unit 201 is connected to the input end of the input matching unit 202, the output end of the input matching unit 202 is connected to the input end of the power amplification unit 203, the output end of the power amplification unit 203 is connected to the input end of the output matching unit 204, and the output end of the output matching unit 204 is connected to the input end of the power synthesis unit 205.
Specifically, after an electrical signal requiring power amplification is input to the power distribution unit 201, the power distribution unit 201 distributes the power of the electrical signal, the input matching 1, the input matching 2, the input matching 3, and the input matching 4 in the input matching unit 202 and the output matching 1, the output matching 2, the output matching 3, and the output matching 4 in the output matching unit 204 complete impedance matching of the input impedance and the output impedance according to the power distribution result of the power distribution unit 201, then the power distribution unit 201 transmits the electrical signal subjected to power distribution to the power amplification unit 203 through the input matching unit 202, the power amplification unit 203 amplifies the electrical signal provided by the second power distribution unit through the first carrier amplification unit and the second carrier amplification unit of the two Doherty power amplification units included in the power amplifier according to the power distribution result of the power distribution unit 201, the electrical signal subjected to power amplification is transmitted to the power synthesis unit 205 through the output matching unit 204, and the electrical signal subjected to power synthesis and output after power synthesis by the power synthesis unit 205.
In one example, the power distribution unit in the power amplifier is a microstrip circuit or an integrated device. The specific type of the selected power distribution unit is adjusted according to actual conditions, so that the practicability of the novel Doherty power amplification framework is guaranteed, and the application range of the novel Doherty power amplification framework is widened.
In another example, an input matching unit and an output matching unit in a power amplifier include: microstrip circuit, capacitor and inductor; the microstrip circuit is used for adjusting the length and the width of the microstrip line, the capacitance value of the capacitor and the inductance value of the inductor to complete impedance matching according to a power distribution result, the input matching network and the output matching network of the power amplifier are formed by combining the selected power amplification module and adopting the microstrip circuit, the capacitor device and the inductor device, the input matching network and the output matching network are respectively used as an input matching unit and an output matching unit, impedance matching of input impedance and output impedance in the power amplification process can be accurately and efficiently completed by adjusting the length and the width of the microstrip line, the capacitance value during the capacitor and the inductance value of the inductor device, and performance requirements of the power amplifier on the aspects of gain, power, efficiency performance and the like on a working frequency band are met.
In another example, the power combining unit includes: the first synthesis unit, and the second synthesis unit and the third synthesis unit which are connected with the input end of the first synthesis unit; the first synthesis unit is used for synthesizing and outputting the outputs of the second synthesis unit and the third synthesis unit; the second synthesis unit is used for synthesizing and outputting the outputs of the first carrier amplification unit and the first peak amplification unit; and the third synthesis unit is used for synthesizing and outputting the outputs of the second carrier amplification unit and the second peak amplification unit.
For example, a schematic structural diagram of a power amplifier is shown in fig. 3, where a portion 301 marked by a dashed line portion in fig. 3 is a power distribution unit in the power amplifier, and the power distribution unit 301 includes: a first distribution unit and a second distribution unit; the input matching unit 302 includes: input match 1, input match 2, input match 3, and input match 4; the power amplifying unit 303 at least comprises a first Doherty amplifying unit 3031 and a second Doherty amplifying unit 3032, wherein the first Doherty amplifying unit 3031 comprises a first peak amplifying unit and a first carrier amplifying unit, and the second Doherty amplifying unit 3032 comprises a second peak amplifying unit and a second carrier amplifying unit; the output matching unit 304 includes: output match 1, output match 2, output match 3, and output match 4; the power combining unit 305 includes a first combining unit, and a second combining unit and a third combining unit connected to an input terminal of the first combining unit; the first synthesis unit is used for synthesizing and outputting the power of the electric signals output by the second synthesis unit and the third synthesis unit; the second synthesis unit is used for synthesizing the power of the electric signals amplified by the first carrier amplification unit and the first peak amplification unit; the third synthesis unit is used for synthesizing the power of the electric signal amplified by the second carrier amplification unit and the second peak amplification unit; in addition, the power amplifier also comprises an input matching which is respectively connected with the input end of each amplifying unit and an output matching which is connected with the output end of each amplifying unit.
In the process of amplifying the power of the electric signals, the first distribution unit distributes the power of the input electric signals to provide the electric signals with distributed power for the first peak value amplification unit, the second peak value amplification unit and the second distribution unit; the second distribution unit performs secondary power distribution on the electric signals according to the received electric signals and provides the electric signals with distributed power for the first carrier amplification unit and the second carrier amplification unit; after the distribution unit finishes power distribution, the input matching unit and the output matching unit finish impedance matching according to the power distribution result of the connected amplifying unit; then the first peak value amplification unit and the second peak value amplification unit carry out power amplification on the electric signal input by the input matching unit of the first distribution unit; the first carrier amplification unit and the second carrier amplification unit perform power amplification on the electric signal input by the second distribution unit through the input matching unit; the first carrier amplification unit and the first peak amplification unit transmit the amplified electric signals to the second synthesis unit through the output matching unit for power synthesis, the second carrier amplification unit and the second peak amplification unit transmit the amplified electric signals to the third synthesis unit through the output matching unit for power synthesis, and then the first synthesis unit synthesizes and outputs the power of the electric signals synthesized by the second synthesis unit and the third synthesis unit. The second distribution unit is used for distributing power for the two carrier amplification units, so that the working states of different carrier amplification units in the two Doherty amplification units in the power amplification units are consistent as much as possible, the consistency is good at different frequency point amplitudes and phases, and the supported bandwidth is improved while the efficiency is ensured.
In another example, the power amplifier further comprises: a third dispensing unit, the first dispensing unit for providing electrical signals to the second dispensing unit and the third dispensing unit, respectively; the third distribution unit is used for respectively providing electric signals for the first peak amplifying unit and the second peak amplifying unit. The power amplifying unit includes at least a first doherty amplifying unit including a first peak amplifying unit and a first carrier amplifying unit and a second doherty amplifying unit including a second peak amplifying unit and a second carrier amplifying unit; the first carrier amplifying unit and the second carrier amplifying unit are used for amplifying the electric signals provided by the second distributing unit, and the first peak amplifying unit and the second peak amplifying unit are used for amplifying the electric signals provided by the third distributing unit.
Another power amplifier circuit structure provided in the embodiment of the present invention is shown in fig. 4, where a portion 401 marked by a dotted line portion is a power distribution unit in a power amplifier, and the power distribution unit includes: the first distribution unit is configured to distribute an input electrical signal and is configured to provide the power-distributed electrical signal to the second distribution unit and the third distribution unit, the third distribution unit is configured to provide the power-distributed electrical signal to the first peaking amplification unit and the second peaking amplification unit, the second distribution unit is configured to provide the power-distributed electrical signal to the first carrier amplification unit and the second carrier amplification unit, and structures and connection relations of the input matching unit 402, the power amplification 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 amplification unit 303, the output matching unit 304, and the power combining unit 305 in fig. 3, and thus, description thereof is omitted.
A portion 403 marked by a dotted line portion is a power amplifying unit in the power amplifier, and at least includes: a first carrier amplifying unit, a second carrier amplifying unit, a first peak amplifying unit and a second peak amplifying unit, wherein the first carrier amplifying unit and the second carrier amplifying unit are connected to the second distribution unit in the power distribution unit 401 through the input matching unit 402 and are used for amplifying the electrical signal provided by the second distribution unit, and the first peak amplifying unit and the second peak amplifying unit are connected to the third distribution unit in the power distribution unit 401 through the input matching unit 402 and are used for amplifying the electrical signal provided by the third distribution unit; the portion 405 marked by the dotted line portion is a power combining unit in the power amplifier, and is used for combining and outputting the electric signals amplified by the power amplifying unit 403. Different carrier power amplifiers contained in the Doherty power amplifier are subjected to power distribution through the same power distribution unit, so that the working states of the different carrier power amplifiers are the same, good consistency is kept between the amplitudes and the phases of different frequency points, and the supported bandwidth is increased while the efficiency is ensured.
Specifically, the first allocation unit, the second allocation unit, and the third allocation unit may be respectively formed by a power division network 1, a power division network 2, and a power division network 3. The input end of the power distribution network 1 receives an input electric signal, and the output end of the power distribution network is respectively connected with the power distribution network 2 and the power distribution network 3; the power distribution network 2 is connected with the first carrier amplification unit and the second carrier amplification unit through input matching, and the power distribution network 3 is connected with the first peak amplification unit and the second peak amplification unit through input matching. The power of the electric signals is divided into two paths in advance through the first distribution unit, and then the electric signals with the power distributed for the peak amplification unit and the carrier amplification unit are respectively provided through the second distribution unit and the third distribution unit, so that the electric signals in the working process of the power amplifier are transmitted independently as far as possible, the electric signals among different distribution units are prevented from influencing each other to the greatest extent, and the quality of the electric signals input to the carrier amplifier is ensured.
The first combining unit of the power combining unit 403 marked by a dotted line portion may be formed by a Doherty combining network, the second combining unit may be formed by a Doherty combining network 1, and the third combining unit may be formed by a Doherty combining network 2, as shown with reference to the power combining unit structure in fig. 3 or fig. 4.
In the process of power amplification of an electrical signal, after receiving the input electrical signal, the power division network 1 divides the electrical signal with distributed power into two paths which are respectively input into the power division network 2 and the power division network 3, the power division network 2 respectively inputs the electrical signal with secondarily distributed power into the first carrier amplifier and the second carrier amplifier through the input matching 2 and the input matching 3, the power division network 3 respectively inputs the electrical signal with secondarily distributed power into the first peak amplifier and the second peak amplifier through the input matching 1 and the input matching 4, after the amplification unit amplifies the electrical signal with the power, the electrical signals output by the first peak amplification unit and the first carrier amplification unit are input into the Doherty network 1 for power synthesis through the output matching 1 and the output matching 2, the electrical signals output by the second peak amplification unit and the second carrier amplification unit are input into the Doherty network 2 for power synthesis through the Doherty network, and the power synthesis of the electrical signals output by the Doherty network 1 and the Doherty network 2 is performed.
For example, the operating bandwidth of a power amplifier with a novel architecture is 1.8G to 2.2 ghz, the output power is 100W, and the applied circuit structure is as shown in fig. 3 or 4, the number of power amplifier transistors and the saturation power level required by the power amplifier are not changed, but the first carrier amplification unit and the second carrier amplification unit at the input end use the same power divider to implement power distribution, the first peak amplification unit and the second peak amplification unit use the same power divider to implement power distribution, and the output end uses a Doherty combining network to implement, which may result in the final performance: the difference between the highest efficiency and the lowest efficiency of different frequency points is lower than 3 percent, and the linear index is improved by more than 2 decibels under the same test condition; in other words, it is equivalent to realize an efficiency improvement of 2%, and an Adjacent Channel Power Ratio (ACPR) index improvement of 2 db.
According to the structural design, different carrier power amplifiers of two Doherty power amplifiers are subjected to power distribution through the same power distributor, so that the working states of the different carrier power amplifiers are the same, and further, the Doherty power amplifiers have good consistency in different frequency point amplitudes and phases.
It should be noted that fig. 4 only specifically illustrates three power dividing networks, and the specific number of power dividing networks in the present invention is not limited. In the power amplifier provided in this embodiment, at least two Doherty amplifying units are included, each Doherty amplifying unit includes a carrier amplifying unit and a peak amplifying unit, and each carrier amplifying unit and each peak amplifying unit respectively include an input matching network, an output matching network, and a Doherty combining network.
For the logic units in the present circuit, such as the carrier amplifying unit and the peak amplifying unit, may be respectively composed of a carrier amplifier and a peak amplifier, and the number thereof is not limited, the novel doherty power amplifying architecture provided in this embodiment may be popularized and applied to a structure composed of n doherty power amplifying units, where n is an integer greater than or equal to 2.
In practical applications, the power combining unit may also be a microstrip circuit or an integrated device, but it does not represent a specific circuit or device, and the form thereof may be changed flexibly in practical applications, so the present invention is not limited to the type thereof, and the protection scope of the present invention is not limited by the above embodiments, as long as the technical effect or purpose described in the present invention is achieved, i.e. the protection scope should be within the protection scope.
In addition, it is to be noted that, in the embodiment of the present invention, a power amplifier is provided and described by taking an example that a circuit structure includes two doherty power amplifiers, in practical applications, the power amplifier may include a plurality of doherty power amplifiers, and a plurality of power splitting networks and combining networks that constitute a plurality of power distribution units and power combining units, in this embodiment, the number of the power amplification units, the power distribution units, and the power combining units specifically included in the power amplifier is not limited, and the number of the power amplification units, the power distribution units, and the power combining units included in the power amplifier may be adjusted according to actual needs.
In the embodiment of the invention, the same power distribution unit is adopted to distribute the power of the carrier amplification units in different Doherty amplification units, so that the working states of the carrier amplification units in different Doherty amplification units are as same as possible, that is, the problem of great difference of the working states of a plurality of carrier power amplifiers in the traditional architecture can not be generated. The method can minimize the difference of the working states of each carrier power amplifier which is most core in the Doherty synthetic structure and plays a key role in performance indexes such as efficiency, bandwidth, performance and the like, namely, the amplitude and phase consistency is best at different frequency points, so that the supportable bandwidth is greatly increased under the condition of equivalent efficiency, or the efficiency and linear indexes are remarkably improved under the condition of the same supported bandwidth, and no additional device is needed.
According to the embodiments, the implementation method of the invention is convenient and flexible in design, does not increase extra hardware cost, can be easily implemented by a person skilled in the same technical field according to the description, and can be widely applied to the design of the radio frequency power amplifier.
Embodiments of the present invention also provide an electronic device, as shown in fig. 5, including at least one power amplifier as described above.
It should be noted 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 may be added according to actual situations, and the number of power amplifiers is not limited by the present invention.
It is to be understood that the embodiments of the present invention are directed to electronic devices that correspond to apparatus embodiments, and that the embodiments of the present invention can be implemented in conjunction with the apparatus embodiments. Related technical details mentioned in the apparatus embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related art details mentioned in the present embodiment can also be applied to the device embodiment.
The above-described embodiments are provided to enable persons skilled in the art to make and use the invention, and that persons skilled in the art may make modifications or changes to the above-described embodiments without departing from the inventive concept thereof, and therefore the scope of protection of the present invention is not limited by the above-described embodiments but should be accorded the widest scope of the inventive features set forth in the claims.
Claims (7)
1. A power amplifier, comprising: the power amplifier comprises a power distribution unit, an input matching unit, a power amplification unit, an output matching unit and a power synthesis unit;
the output end of the power distribution unit is connected with the input end of the input matching unit, the output end of the input matching unit is connected with the input end of the power amplification unit, the output end of the power amplification unit is connected with the input end of the output matching unit, and the output end of the output matching unit is connected with the input end of the power synthesis unit;
the power amplifying unit includes at least a first doherty amplifying unit including a first peak amplifying unit and a first carrier amplifying unit and a second doherty amplifying unit including a second peak amplifying unit and a second carrier amplifying unit; the power distribution unit comprises at least a first distribution unit and a second distribution unit;
the first distribution unit is used for respectively providing electric signals for the second distribution unit, the first peak amplification unit and the second peak amplification unit; the second distribution unit is used for respectively providing electric signals for the first carrier amplification unit and the second carrier amplification unit; the first peak amplifying unit and the second peak amplifying unit are used for amplifying the electric signals provided by the first distribution unit; the first carrier amplifying unit and the second carrier amplifying unit are used for amplifying the electric signals provided by the second distributing unit;
the input matching unit is used for completing input impedance matching of the power amplification unit according to the power distribution result of the power distribution unit;
the output matching unit is used for completing the output impedance matching of the power amplification unit according to the power distribution result of the power distribution unit;
the power synthesis unit is used for synthesizing and outputting the electric signals amplified by the power amplification unit.
2. The power amplifier of claim 1, further comprising: a third distribution unit;
the first distribution unit is used for respectively providing electric signals for the second distribution unit and the third distribution unit;
the third distribution unit is used for respectively providing electric signals for the first peak amplification unit and the second peak amplification unit.
3. The power amplifier of claim 1, wherein the power distribution unit is a microstrip circuit or an integrated device.
4. The power amplifier according to any one of claims 1 to 3, wherein the input matching unit and the output matching unit comprise: microstrip circuit, capacitor and inductor;
and the microstrip circuit is used for adjusting the length and the 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 finish impedance matching.
5. The power amplifier according to any one of claims 1 to 3, wherein the power combining unit comprises: the first synthesis unit, and the second synthesis unit and the third synthesis unit which are connected with the input end of the first synthesis unit;
the first synthesis unit is used for synthesizing and outputting the outputs of the second synthesis unit and the third synthesis unit;
the second synthesis unit is used for synthesizing and outputting the outputs of the first carrier amplification unit and the first peak amplification unit;
the third synthesis unit is configured to synthesize and output the outputs of the second carrier amplification unit and the second peak amplification unit.
6. A method of power amplification, comprising:
acquiring an electric signal to be amplified;
amplifying the electrical signal to be amplified with a power amplifier according to any of claims 1 to 5.
7. An electronic device, characterized in that the electronic device comprises a power amplifier according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114404.XA CN115913123A (en) | 2021-09-23 | 2021-09-23 | Power amplifier, power amplification method and electronic device |
| PCT/CN2022/120657 WO2023046035A1 (en) | 2021-09-23 | 2022-09-22 | Power amplifier, power amplification method, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114404.XA CN115913123A (en) | 2021-09-23 | 2021-09-23 | Power amplifier, power amplification method and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN115913123A true CN115913123A (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111114404.XA Pending CN115913123A (en) | 2021-09-23 | 2021-09-23 | Power amplifier, power amplification method and electronic device |
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| Country | Link |
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| CN (1) | CN115913123A (en) |
| WO (1) | WO2023046035A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5786727A (en) * | 1996-10-15 | 1998-07-28 | Motorola, Inc. | Multi-stage high efficiency linear power amplifier and method therefor |
| KR101709347B1 (en) * | 2009-12-16 | 2017-03-09 | 삼성전자주식회사 | A combined cell doherty power amplify apparatus and method |
| US8749306B2 (en) * | 2011-03-16 | 2014-06-10 | Cree, Inc. | Enhanced Doherty amplifier |
| JP5599364B2 (en) * | 2011-05-06 | 2014-10-01 | 三菱電機株式会社 | Doherty amplifier |
| US11108361B2 (en) * | 2019-08-15 | 2021-08-31 | Nxp Usa, Inc. | Integrated multiple-path power amplifier with interdigitated transistors |
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2021
- 2021-09-23 CN CN202111114404.XA patent/CN115913123A/en active Pending
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- 2022-09-22 WO PCT/CN2022/120657 patent/WO2023046035A1/en active Application Filing
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| WO2023046035A1 (en) | 2023-03-30 |
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