CN111510087A - Co-time multi-frequency power amplifier circuit with multi-port frequency division output function - Google Patents

Abstract

An embodiment of the present invention provides a synchronic multi-frequency power amplifier circuit with a multi-port frequency division output function, comprising: a substrate; a power amplifier circuit arranged on the top layer of the substrate, and used to transmit the signal of the branch through an adjacent-frequency open-circuit network. RF signals, and reflect the preset RF signals of other branches, the length of the open branches in the adjacent-frequency open-circuit network is a quarter-wavelength value of the preset RF signals of other branches; harmonic tuning and matching networks, using is used to adjust the harmonic impedance of the radio frequency signal of this branch, and match the impedance of the output port of this branch to the optimal impedance required by the transistor to obtain the adjusted radio frequency signal; the output port of each branch, It is used to output one channel of adjusted RF signal as one channel of single frequency signal.

Description

A simultaneous multi-frequency power amplifier circuit with multi-port frequency division output function

technical field

The invention relates to the field of electrical technology, in particular to a synchronous multi-frequency power amplifier circuit with a multi-port frequency division output function.

Background technique

In recent years, the development of communication technology has become more and more rapid, and the application of communication has become more and more diversified, so people's demand for communication has increased rapidly, especially mobile communication. With the increasing status of mobile communication, people put forward higher and higher requirements for the utilization of spectrum resources. Therefore, this presents new challenges for RF systems. A radio frequency system can implement an electronic device to wirelessly transmit data with another electronic device and/or a network through radio frequency signals.

The power amplifier is an important energy conversion and power output device in the RF system. It is generally used as the end of the amplification system and is directly connected to the load to convert DC energy into RF energy. As a power output device, the power amplifier's output power directly affects the transmission distance and quality of wireless signals. As a high-power device, the power amplifier's power consumption and efficiency also directly affect the overall power consumption and efficiency of the RF system.

The multi-band RF system in the RF system can obtain multiple channels of single-frequency signals with different frequencies. The following is an example of a dual-band RF system that obtains two channels of single-frequency signals with different frequencies. Generally, a dual-band RF system includes: dual-band power Amplifier and frequency divider, through the combination of dual-frequency power amplifier and frequency divider, two single-frequency signals of different frequencies can be obtained. details as follows:

The dual-frequency power amplifier includes: an input terminal and an output terminal. An input terminal of the dual-frequency power amplifier and an output terminal of the dual-frequency power amplifier are implemented through a matching circuit to achieve impedance matching between the input signal and the output signal. One output end of the power amplifier is connected to the frequency divider; usually different antennas are used to transmit signals of different frequency bands as input signals; one input end of the dual frequency power amplifier receives the input signal and amplifies the signals of different frequency bands to the target The magnitude, such as intensity, generates an amplified dual-frequency signal, and one output terminal of the dual-frequency power amplifier outputs the amplified dual-frequency signal; the amplified dual-frequency signal is transmitted to the frequency divider, and the frequency divider will The amplified dual-frequency signal is separated into two single-frequency signals of different frequencies.

The input signal of the dual-frequency power amplifier needs to be matched by a matching circuit, output an amplified dual-frequency signal, and then obtain two single-frequency signals of different frequencies through a frequency divider. Due to the complex structure of the matching circuit and the frequency divider, and The frequency divider is an independent and dual-frequency power amplifier device, and the frequency divider itself has a complex structure, which makes the circuit area occupied by the dual-frequency power amplifier and the frequency divider larger.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a synchronous multi-frequency power amplifier circuit with a multi-port frequency division output function, which is used to solve the problem that the circuit occupied by the multi-band radio frequency system of obtaining multiple single-frequency signals of different frequencies in the prior art is occupied by the circuit. Large area problem. The specific technical solutions are as follows:

An embodiment of the present invention provides a simultaneous multi-frequency power amplifier circuit with a multi-port frequency division output function, including:

substrate;

a power amplifier circuit disposed on the top layer of the substrate, wherein,

The power amplifier circuit includes: one input port, two or more output ports, respectively connected to an input matching network between the input port and the output port, a stabilization network, a power supply network, a transistor, and the number of the output ports. The same output matching network; an output matching network and an output port connected with the one output matching network form a branch, and the number of the branches is the same as the number of the output ports;

The output matching network of each branch includes: a branch port branched from the branch branch, an adjacent frequency open-circuit network and a harmonic tuning and matching network arranged between the branch port and the output port; the The adjacent-frequency open-circuit network includes: the same number of transmission lines and open-circuit branches as other branches except this branch;

The adjacent frequency open circuit network is used to transmit the radio frequency signal of this branch and reflect the preset radio frequency signals of other branches, and the length of the open branch in the adjacent frequency open circuit network is the preset radio frequency signal of the other branch. The value of a quarter wavelength of ;

The harmonic tuning and matching network is used to adjust the harmonic impedance of the radio frequency signal of this branch, and to match the impedance of the output port of this branch to the optimal impedance required by the transistor, after the adjustment is obtained. the radio frequency signal;

The output port of each branch is used to output a channel of the adjusted radio frequency signal as a channel of single frequency signal.

Further, the synchronous multi-frequency power amplifier circuit with multi-port frequency division output function further includes: a third capacitor and a first capacitor;

One end of the third capacitor is connected to the drain pad of the transistor, and the other end of the third capacitor is connected to the branch branch;

The first capacitor is connected between the input matching network and the input port, and one end of the first capacitor is connected to the input port.

Further, in the case where the two or more output ports are two output ports, the transmission line in the adjacent frequency open circuit network is the sixth transmission line, and the open circuit branch in the adjacent frequency open circuit network is the fourth open circuit branch. Festival,

One end of the sixth transmission line is connected to one branch port in the branch branch port, and the other end of the sixth transmission line is connected to the other end of the fourth open-circuit branch and the harmonic tuning and matching network. At the connection of one end of the seventh transmission line, one end of the fourth open-circuit branch is open, and the other end of the fourth open-circuit branch is connected to the other end of the sixth transmission line and the harmonic tuning and matching network. Seven connection at one end of the transmission line.

Further, the harmonic tuning and matching network includes: a transmission line and an open-circuit branch, the transmission line in the harmonic tuning and matching network and the open-circuit branch in the harmonic tuning and matching network appear in pairs, and the number is the same, 1≤The number of open-circuit branches in the harmonic tuning and matching network and the number of open-circuit branches in the harmonic tuning and matching network≤3.

Further, the transmission line in the harmonic tuning and matching network includes a seventh transmission line and the open-circuit branch in the harmonic tuning and matching network includes a fifth open-circuit branch, wherein

One end of the seventh transmission line is connected to the connection between the sixth transmission line and the fourth open-circuit branch, and the other end of the seventh transmission line is connected to the other end of the fifth open-circuit branch and one of the branches. At the connection of one end of the transmission line in the output port, one end of the fifth open-circuit branch is open, and the other end of the fifth open-circuit branch is connected to the other end of the seventh transmission line and one output port of the current branch A connection at one end of a transmission line.

Further, the output port includes a ninth transmission line and an output port of this branch, one end of the ninth transmission line is connected to the last transmission line in the harmonic tuning and matching network, and the other end of the transmission line is connected to the harmonic. The other end of the last open branch in the tuning and matching network, and the other end of the ninth transmission line is connected to an output port of the branch.

Further, the input matching network includes: three sections of transmission lines and three open-circuit branches, wherein the three sections of transmission lines in the input matching network are respectively a first transmission line, a second transmission line, and a third transmission line, and the input matching network in the The three open-circuit branches are the first open-circuit branch, the second open-circuit branch, and the third open-circuit branch, among which,

One end of the first open-circuit branch is open-circuited, and the other end of the first open-circuit branch is connected to the connection with the other end of the first capacitor and one end of the first transmission line;

One end of the first transmission line is connected to the connection between the other end of the first capacitor and the other end of the first open branch, and the other end of the first transmission line is connected to the other end of the second open branch and the other end of the first open branch. At the connection of the other end of the second transmission line, one end of the second open-circuit branch is open, and the other end of the second open-circuit branch is connected to the other end of the first transmission line and the other end of the second transmission line. Junction;

One end of the second transmission line is connected to the connection between the second open-circuit branch and the first transmission line, and the other end of the second transmission line is connected to the connection between the other end of the third open-circuit branch and one end of the third transmission line One end of the third open-circuit branch is open-circuited, and the other end of the third open-circuit branch is connected to the connection between the other end of the second transmission line and one end of the third transmission line.

Further, the stabilization network is connected between the input matching network and the source of the transistor, and the stabilization network includes: a second capacitor and a first resistor, wherein,

One end of the second capacitor and the first resistor in parallel is connected to the other end of the third transmission line, and the other end of the second capacitor and the first resistor in parallel is welded to the gate of the transistor. disk connection.

Further, the power supply network includes: an input power supply network and an output power supply network; wherein,

The input power supply network includes: a fourth transmission line and a first inductor, wherein,

One end of the first inductance is connected to the other end of the second capacitor and the first resistor in parallel, at the connection with the gate pad of the transistor, and the other end of the first inductance is connected to one end of the fourth transmission line connection, and the other end of the fourth transmission line is connected to the DC power supply;

The output power supply network includes: a fifth transmission line and a second inductance, wherein one end of the second inductance is connected to the drain pad of the transistor, and the other end of the second inductance is connected to one end of the fifth transmission line , the other end of the fifth transmission line is connected with the DC power supply.

Further, the input power supply network further includes: a second resistor connected between the other end of the fourth transmission line and the DC power supply.

Beneficial effects of the embodiment of the present invention:

The embodiment of the present invention provides a simultaneous multi-frequency power amplifier circuit with multi-port frequency division output function. The length is a quarter wavelength of the preset RF signal of other branches, and the adjacent-frequency open-circuit network is used to reflect the energy of the preset RF signal of other branches, so that the preset RF signals of other branches cannot go to this branch. After transmission, it is equivalent to an open circuit, and only the radio frequency signal of this branch is retained. The adjacent-frequency open-circuit network added in the power amplifier circuit to realize the frequency division function belongs to the power amplifier itself. The circuit is a miniaturized circuit; in addition, the power amplifier circuit itself outputs multiple single-frequency signals of different frequencies through multiple output terminals, and the complexity of the output matching network for processing the single-frequency signal of each branch is lower than that in the prior art. The output matching network of one multi-frequency signal simplifies the circuit; in addition, by printing the power amplifier circuit on the substrate, the integrated circuit can also reduce the area of the power amplifier circuit, so the embodiment of the present invention has a multi-port frequency division Compared with the prior art, the synchronous multi-frequency power amplifier circuit with output function occupies a smaller circuit area.

Of course, it is not necessary for any product or method of the present invention to achieve all of the advantages described above at the same time.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic diagram of a circuit of a simultaneous multi-frequency power amplifier circuit with a multi-port frequency division output function according to an embodiment of the present invention;

2 is a schematic circuit diagram of an embodiment of the present invention;

3 is a circuit plan structure diagram of an embodiment of the present invention;

4 is a schematic diagram of a simulation result of an input impedance curve of an input matching network in an embodiment of the present invention;

5 is a schematic diagram of a simulation result of an S-parameter curve of an output matching network in an embodiment of the present invention;

6 is a schematic diagram of a simulation result of a synchronous multi-frequency power amplifier circuit with a multi-port frequency division output function at a center frequency of 3.5 GHz S-parameter according to an embodiment of the present invention;

7 is a schematic diagram of the simulation result of the S-parameter of the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function under the center frequency of 5 GHz in the embodiment of the present invention;

8 is a schematic diagram of the simulation results of the variation of the gain, output power and efficiency with the input power of the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function under the center frequency of 3.5 GHz according to the embodiment of the present invention;

9 is a schematic diagram of the simulation result of the variation of gain, output power and efficiency with input power of a synchronically multi-frequency power amplifier circuit with a multi-port frequency division output function at a center frequency of 5 GHz according to an embodiment of the present invention;

10 is a schematic diagram of the simulation result of the variation of gain, output power and efficiency with frequency when the center frequency is 3.5 GHz and the input signal strength is 29 dBm for the synchro-time multi-frequency power amplifier circuit with the multi-port frequency division output function according to the embodiment of the present invention ;

11 is a schematic diagram of the simulation result of the variation of gain, output power and efficiency with frequency when the center frequency is 5GHz and the input signal strength is 29dBm of the synchronizing multi-frequency power amplifier circuit with the multi-port frequency division output function according to the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

First of all, in order to facilitate the understanding of the embodiments of the present invention, the terms “first capacitor”, “second capacitor”, “third capacitor”, “first resistor”, “third capacitor”, “first Two resistors, "first inductance", "second inductance", "first transmission line" to "thirteenth transmission line", "first open branch" to "ninth open branch", "first output port" ” and “Second Output Port”, etc.

In the embodiment of the present invention, the "first" of the "first capacitor", the "second" of the "second capacitor", and the "third" of the "third capacitor" are used to distinguish the three capacitors here. This does not limit the order. The three capacitors in the embodiments of the present invention may be collectively referred to as capacitors. The capacitance of the capacitor in the embodiment of the present invention does not exceed 10pF.

Similarly, "first" in "first resistor" and "second" in "second resistor" are also used to distinguish two resistors, and the order is not limited here. The "first" of the "first inductance" and the "second" of the "second inductance" are also used to distinguish two inductances, and the order is not limited here. "First" to "Thirteenth Transmission Line" in "First Transmission Line" is also used to distinguish thirteen transmission lines, and the order is not limited here. The "ninth" in "first" to "ninth open branch" of "first open branch" is also used to distinguish nine open branch, and the order is not limited here. The "first" of the "first output port" and the "second" of the "second output port" are also used to distinguish two ports, and the order is not limited here.

The above-mentioned transmission line and open branch can be a 50-ohm transmission line, the transmission line is named from the nature, and the open branch is named from the function.

The following will continue to introduce the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function provided by the embodiment of the present invention.

Aiming at the problem of the large circuit area occupied by obtaining multiple channels of single-frequency signals and multi-band radio frequency systems with different frequencies in the prior art, the embodiment of the present invention provides a synchronous multi-frequency power amplifier circuit with a multi-port frequency division output function, By adding an adjacent-frequency open-circuit network in the output matching network of the power amplifier circuit, the length of the open-circuit branch in the adjacent-frequency open-circuit network is a quarter wavelength of the preset radio frequency signal of other branches, and the adjacent-frequency open-circuit network is used for The energy of the preset radio frequency signals of other branches is reflected, so that the preset radio frequency signals of other branches cannot be transmitted to this branch, which is equivalent to an open circuit, and only the radio frequency signals of this branch are retained. The adjacent-frequency open-circuit network added in the power amplifier circuit to realize the frequency division function belongs to the power amplifier itself. The circuit is a miniaturized circuit; in addition, the power amplifier circuit itself outputs multiple single-frequency signals of different frequencies through multiple output terminals, and the complexity of the output matching network for processing the single-frequency signal of each branch is lower than that in the prior art. The output matching network of one multi-frequency signal simplifies the circuit; in addition, by printing the power amplifier circuit on the substrate, the integrated circuit can also reduce the area of the power amplifier circuit, so the embodiment of the present invention has a multi-port frequency division Compared with the prior art, the synchronous multi-frequency power amplifier circuit with output function occupies a smaller circuit area.

Referring to FIG. 1 and FIG. 2 , the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function provided by the embodiment of the present invention may include the following contents:

substrate;

a power amplifier circuit disposed on the top layer of the substrate, wherein,

The power amplifier circuit includes: one input port, two or more output ports, respectively connected to the input matching network 6 between the input port and the output port, the stabilization network 22, the power supply network, the transistor 15 and the An output matching network with the same number of output ports; an output matching network and an output port connected to the one output matching network form a branch, and the number of the branches is the same as the number of the output ports; wherein, the power supply network includes : input power supply network 231 and output power supply network 232;

The output matching network of each branch includes: a branch port branched from the branch branch, an adjacent frequency open circuit network 251 and a harmonic tuning and matching network 252 arranged between the branch port and the output port; The adjacent-frequency open-circuit network includes: the same number of transmission lines as other branches except this branch and the same number of open-circuit branches as other branches except this branch;

The adjacent frequency open circuit network is used to transmit the radio frequency signal of this branch and reflect the preset radio frequency signals of other branches, and the length of the open branch in the adjacent frequency open circuit network is the preset radio frequency signal of the other branch. The value of a quarter wavelength of ;

The harmonic tuning and matching network is used to adjust the harmonic impedance of the radio frequency signal of this branch, and to match the impedance of the output port of this branch to the optimal impedance required by the transistor, after the adjustment is obtained. the radio frequency signal;

The output port of each branch is used to output a channel of the adjusted radio frequency signal as a channel of single frequency signal.

It should be noted that the above-mentioned adjacent-frequency open-circuit network can be connected to the branch port and the above-mentioned harmonic tuning and matching network can be connected between the adjacent-frequency open-circuit network and an output port to obtain the single-frequency signal of each branch. The transistor in the embodiment of the present invention is not limited, and a gallium nitride (gallium nitride, GaN for short)-based high electron mobility transistor (High electron mobility transistor, HEMT for short) can be used, and the model of the transistor is CGH40010F. The adjacent branches of this transmission branch may refer to branches other than this branch.

In the embodiment of the present invention, by adding an adjacent frequency open circuit network in the output matching network of the power amplifier circuit, the length of the open circuit branch in the adjacent frequency open circuit network is a quarter wavelength of the preset radio frequency signal of other branches, In addition, the adjacent-frequency open-circuit network is used to reflect the energy of the preset radio frequency signals of other branches, so that the preset radio frequency signals of other branches cannot be transmitted to this branch, which is equivalent to an open circuit, and only the radio frequency signals of this branch are retained. The adjacent-frequency open-circuit network added in the power amplifier circuit to realize the frequency division function belongs to the power amplifier itself. The circuit is a miniaturized circuit; in addition, the power amplifier circuit itself outputs multiple single-frequency signals of different frequencies through multiple output terminals, and the complexity of the output matching network for processing the single-frequency signal of each branch is lower than that in the prior art. The output matching network of one multi-frequency signal simplifies the circuit; in addition, by printing the power amplifier circuit on the substrate, the integrated circuit can also reduce the area of the power amplifier circuit, so the embodiment of the present invention has a multi-port frequency division Compared with the prior art, the synchronous multi-frequency power amplifier circuit with output function occupies a smaller circuit area.

It should be noted that, the above-mentioned substrate may be a dielectric plate for setting the power amplifier circuit, of course, the number of layers of the substrate is not limited. In order to simplify the circuit and facilitate the realization, the single-layer dielectric board can be used as the substrate, and the design method of the single-layer dielectric board is used to realize the realization. The method is mature and the design idea is simple. In some cases, the simultaneous multi-frequency power amplifier circuit with multi-port frequency division output function can be integrated and applied in other systems, and the substrate can be a multi-layer dielectric board, which is determined according to the actual situation. The substrate can be but not limited to Rogers RO4350B, which has a dielectric constant of 3.66, a thickness of 0.762mm, a dielectric loss of 0.0035, a port width W1 of 1.6mm, and an arbitrary length. In the embodiment of the present invention, the length is 5mm.

The top layer of the single-layer dielectric plate of the present invention may be a synchronic multi-frequency power amplifier circuit with a multi-port frequency division output function, the bottom layer of the single-layer dielectric plate is a metal ground plane, and there are cut square holes in the middle for the transistors to connect to the heat sink. The bottom layer is connected to the top layer using metal vias.

For the convenience of description, with reference to FIG. 1 , the overall structure of the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function will be described first.

From the overall point of view of the embodiment of the present invention, the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function is a multi-port device, wherein, there is one input port and two or more output ports. The top power amplifier circuit includes: an input matching network, a stabilization network, a transistor, a power supply network, and an output matching network with the same number of output and output ports. In this way, there will be an output matching network for each branch, so as to obtain a single frequency signal on each branch.

The above-mentioned output port is used for outputting the single-frequency signal of the target frequency, that is, the radio frequency signal of this branch, wherein the target frequency band can be set according to user requirements. Of course, the number of the above-mentioned output ports is the same as the number of desired target frequencies, and the user can set it according to the number of desired target frequencies. The preset radio frequency signals of the above-mentioned other branches may be set according to user requirements, and refer to other radio frequency signals other than the radio frequency signals of this branch.

For the convenience of understanding and description, the above-mentioned input matching network may include, but is not limited to, three open-circuit branches and three-segment transmission lines. The output matching network may include, but is not limited to, more than two open-circuit branches, and the power supply network may include, but is not limited to, a section of transmission line and an inductance, wherein the inductance here is a high-inductance value inductance. The value range is above 10nH, and the optional high sensitivity value is 18nH. The stabilization network may, but is not limited to, include a capacitor and a resistor. In this way, the more than two frequency power amplifier circuits with the function of frequency division and output of more than two ports have good gain, high efficiency, and two or more frequency power amplifiers with larger output power have good performance in both target frequency bands. The specific instructions are as follows:

In order to create the optimal input impedance at the target frequency for more than two branches, the input matching network can be used to achieve the optimal input impedance at more than two frequency bands, with various implementations. In a possible implementation manner, the input matching network includes: three sections of transmission lines and three open-circuit branches, wherein the three sections of transmission lines in the input matching network are respectively a first transmission line, a second transmission line, and a third transmission line, The three open-circuit branches in the input matching network are respectively the first open-circuit branch, the second open-circuit branch, and the third open-circuit branch. The input matching network is used to achieve the optimal input impedance under two or more frequency bands, wherein the first One end of an open-circuit branch is open-circuited, and the other end of the first open-circuit branch is connected to the connection with the other end of the first capacitor and one end of the first transmission line;

One end of the first transmission line is connected to the connection between the other end of the first capacitor and the other end of the first open branch, and the other end of the first transmission line is connected to the other end of the second open branch and the other end of the second transmission line One end of the second open-circuit branch is open-circuited, and the other end of the second open-circuit branch is connected to the connection between the other end of the first transmission line and the other end of the second transmission line;

One end of the second transmission line is connected to the connection between the second open branch and the first transmission line, the other end of the second transmission line is connected to the connection of the other end of the third open branch and one end of the third transmission line, and the third open branch One end of the segment is open, and the other end of the third open branch segment is connected to the connection between the other end of the second transmission line and one end of the third transmission line; there is a transition zone between the second transmission line and the first transmission line;

The other end of the third transmission line is connected with the stable network; there is a transition zone between the third transmission line and the second transmission line.

In order to stabilize the synchronous multi-frequency power amplifier circuit with multi-port frequency division output function without self-excitation, the stabilization network can be used to stabilize the power amplifier circuit without self-excitation, and there are many possible implementation methods. In a possible implementation manner, the stabilization network is connected between the input matching network and the source of the transistor, and the stabilization network includes: a second capacitor and a first resistor, wherein,

One end of the second capacitor and the first resistor in parallel is connected to the other end of the third transmission line, and the other end of the second capacitor and the first resistor in parallel is connected to the gate pad of the transistor.

In order to create a DC short circuit, an AC open circuit condition, and provide a DC bias without affecting the circuit, the power supply network can be used to power the gate and drain of the transistor, there are many possible implementations, in one possible In the implementation of the power supply network, the power supply network includes: an input power supply network and an output power supply network; one end of the input power supply network is connected to the DC power supply, the other end of the input power supply network is connected to the gate pad of the transistor, and one end of the output power supply network is connected to the DC power supply Connect, the other end of the output power supply network is connected to the drain pad of the transistor;

The input power supply network includes: a fourth transmission line and a first inductor for a DC short circuit, an AC open circuit, and providing a DC bias without affecting the circuit, wherein,

One end of the first inductance is connected to the other end of the second capacitor and the first resistor in parallel, at the connection with the gate pad of the transistor, the other end of the first inductance is connected to one end of the fourth transmission line, and the other end of the fourth transmission line Connect with DC power supply;

The output power supply network includes: a fifth transmission line and a second inductance, wherein one end of the second inductance is connected to the drain pad of the transistor, the other end of the second inductance is connected to one end of the fifth transmission line, and the other end of the fifth transmission line is connected to the drain pad of the transistor. DC power connection.

In order to enhance low frequency stability, in another possible implementation manner, the input power supply network further includes: the input power supply network further includes: a second resistor for enhancing low frequency stability, the second resistor is connected to the between the other end of the fourth transmission line and the DC power supply.

In order to block the DC of the input signal, in a possible implementation manner, the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function further includes: a first capacitor for blocking the DC of the input signal;

In order to block the DC output signal, in a possible implementation manner, the synchronous multi-frequency power amplifier circuit with the multi-port frequency division output function further includes: a third capacitor for blocking the DC output signal;

One end of the third capacitor is connected to the drain pad of the transistor, and the other end of the third capacitor is connected to the branch branch; wherein the source of the transistor is grounded, and the gate pad of the transistor is connected to the stable The network is connected to the input power supply network in the power supply network, the drain pad of the transistor is respectively connected to the output power supply network and one end of the third capacitor in the power supply network, and the output power supply network is located between the drain pad of the transistor and one end of the third capacitor. between;

The first capacitor is connected between the input matching network and the input port, and one end of the first capacitor is connected to the input port. Each branch port is connected to the output matching network of a branch in a one-to-one correspondence.

The number of the above two or more tributary ports is the same as the number of the above output ports. In this way, DC can be blocked by the output terminal of the third capacitor, and then more than two branch ports can be divided.

Based on the above two or more tributary ports, in order for the two or more output ports to output a desired single-frequency signal, each tributary corresponding to each tributary port in the two or more tributary ports needs to reserve a single-frequency signal. More than two branch ports, each of which is connected to an adjacent-frequency open-circuit network, which includes: the same number of transmission lines and open-circuit branches as other branches except this branch. In the case where the two or more output ports are two output ports, the transmission line in the adjacent-frequency open-circuit network is the sixth transmission line, and the open-circuit branch in the adjacent-frequency open-circuit network is the fourth open branch,

One end of the sixth transmission line is connected to one branch port in the branch branch port, and the other end of the sixth transmission line is connected to the other end of the fourth open-circuit branch and the harmonic tuning and matching network. At the connection of one end of the seventh transmission line, one end of the fourth open-circuit branch is open, and the other end of the fourth open-circuit branch is connected to the other end of the sixth transmission line and the harmonic tuning and matching network. Seven connection at one end of the transmission line. In this way, the adjacent-frequency open-circuit network is used to create an open-circuit condition for another frequency, preventing the branch from affecting the other frequency.

In order to realize the harmonic adjustment of the multi-frequency output function, the open-circuit branch of the harmonic tuning and matching network is used to create an open-circuit short-circuit condition of the second and third harmonics, and the transmission line of the harmonic tuning and matching network is used to convert the open-circuit of the harmonics. The short-circuit condition is transmitted to the drain plane of the transistor, and the impedance matching is adjusted, which can be realized in various implementations. In one possible implementation, the harmonic tuning and matching network includes: a transmission line and an open-circuit branch, the The transmission line in the harmonic tuning and matching network and the open-circuit branches in the harmonic tuning and matching network appear in pairs, and the number is the same, 1≤the transmission line in the harmonic tuning and matching network and the harmonic tuning and matching network. The number of open-circuit branches is less than or equal to 3. When the number of the transmission line in the harmonic tuning and matching network and the number of open-circuit branches in the harmonic tuning and matching network is 1, the effect of the harmonic tuning and matching network can be realized. In order to strengthen the effect of the harmonic tuning and matching network , the number of the transmission line in the harmonic tuning and matching network and the number of open-circuit branches in the harmonic tuning and matching network may be three. The number of transmission lines in the harmonic tuning and matching network and the number of open-circuit branches in the harmonic tuning and matching network can both be adjusted according to user needs.

When the above harmonic tuning and matching network includes: a section of transmission line and a section of open-circuit branches, in a possible implementation manner, the transmission line in the harmonic tuning and matching network includes a section of seventh transmission line and the harmonic tuning and matching network. The open branch in the matching network includes a fifth open branch, and the specific connection method is described as follows:

One end of the seventh transmission line is connected to the connection between the sixth transmission line and the fourth open-circuit branch, and the other end of the seventh transmission line is connected to the other end of the fifth open-circuit branch and one of the branches. At the connection of one end of the transmission line in the output port, one end of the fifth open-circuit branch is open, and the other end of the fifth open-circuit branch is connected to the other end of the seventh transmission line and one output port of the current branch A connection at one end of a transmission line. In this way, the harmonic tuning and matching network is used to adjust the harmonic impedance to achieve higher efficiency, and the matching network matches the 50Ω impedance of the output port to the optimal impedance required by the transistor. The harmonic tuning network can be integrated with the input matching, and the harmonic tuning and input matching can be performed by one network at the same time.

In one of the above possible implementations, the harmonic tuning and matching network of this branch above includes a section of transmission line and an open branch. In order to better achieve harmonic adjustment, branches can be added according to the actual situation. For example, this article The harmonic tuning and matching network of the branch includes: two transmission lines and two open-circuit branches, so in another possible implementation, the harmonic tuning and matching network of this branch includes: the seventh transmission line, the fifth The open branch, the eighth transmission line and the sixth open branch, wherein,

One end of the seventh transmission line is connected to the connection of the sixth transmission line and the fourth open branch, the other end of the seventh transmission line is connected to the connection of the other end of the fifth open branch and one end of the eighth transmission line, and one end of the fifth open branch , the other end of the fifth open-circuit branch is connected to the connection between the other end of the seventh transmission line and one end of the eighth transmission line;

The other end of the eighth transmission line is connected to the connection with the other end of the sixth open-circuit branch and one end of the ninth transmission line in one output port of this branch, one end of the sixth open-circuit branch is open, and the other end of the sixth open-circuit branch is connected at the connection between the other end of the eighth transmission line and one end of the ninth transmission line.

Similarly, in yet another possible implementation manner, the harmonic tuning and matching network of this branch may include, but is not limited to: three-segment transmission lines and three open-circuit branches. On the above, add a section of transmission line and open-circuit branch, and the way of adding is the same as another possible implementation corresponding to the harmonic tuning and matching network of this branch. illustrate.

In order not to affect the symmetry between multiple output ports, the embodiment of the present invention provides a possible implementation manner, the output port includes a ninth transmission line and an output port of this branch, and one end of the ninth transmission line is connected to The other end of the last transmission line in the harmonic tuning and matching network is connected to the other end of the last open branch in the harmonic tuning and matching network, and the other end of the ninth transmission line is connected to the branch. an output port of the channel. The characteristic impedance of the ninth transmission line used for the connection of the output port is 50Ω, the length is arbitrary, and the influence on the index of the output network is small. The last section of the transmission line and the last open-circuit branch respectively refer to a section of the transmission line and an open-circuit branch near the output port in the harmonic tuning and matching network.

Compared with the traditional multi-frequency system, multi-channel power amplifiers are usually required, and the production cost is high, which is prone to waste of resources. Even if the multi-channel power amplifier reduces the number of transistors, it still needs a frequency divider to transmit to different frequency band antennas. output. In a possible implementation manner of the embodiment of the present invention, the co-time multi-frequency power amplifier circuit with the multi-port frequency division output function integrates the multi-port frequency division output function and the output matching network, which greatly simplifies the circuit structure. , it is more convenient to manufacture, and at the same time, it also plays a huge role in the miniaturization and integration of the communication system.

In order to reduce the occupied area of the input port and the output port, the input port and the output port may be, but not limited to, ultra-small SMA connectors. The characteristic impedance of the input port and the output port are both 50Ω.

For convenience of description, the number of the above-mentioned output ports is 2 for description below. In the case where the number of the output ports is 2, the above two target frequencies are 3.5GHz and 5GHz respectively, which can be applied to the main working frequency bands of the current 5G communication system in the sub 6G frequency band, thereby completing the 5G that is widely used today. system.

In order to obtain the above two target frequencies, as shown in FIG. 2 and FIG. 3 , the power amplifier circuit includes: one input port, two output ports, and an input matching network connected between the input ports and the output ports , a stabilization network, a power supply network, a transistor 15 and two output matching networks, wherein the two output matching networks include: a branch port branched from the branch branch, the output matching network of the first branch 7 and the The output matching network of the second branch 8, the two output ports include: the output port 2 of the first branch and the output port 3 of the second branch, the output port 2 of the first branch and the output port 3 of the second branch in FIG. 3 The output port 3 of the circuit corresponds to the output port 2 of the first branch and the output port 3 of the second branch in FIG. 2 . The circuit obtained by arranging the power amplifier circuit on the top layer of the substrate can be called a dual-frequency power amplifier circuit with a dual-port frequency division output function. This dual-frequency power amplifier circuit with dual-port frequency division output function integrates the frequency division output function into the power amplifier, and has the characteristics of simple structure, high efficiency, flat gain, and wide bandwidth.

Based on the above-mentioned dual-frequency power amplifier circuit with dual-port frequency division output function, the above-mentioned input matching network can use a dual-frequency matching structure with three open-circuit branches, including three open-circuit branches and three-segment transmission lines. The output matching network includes two open-circuit branches, and the power supply network includes a transmission line and an inductance, wherein the inductance here is a high inductance value inductance, and the value range of the high inductance value is above 10nH, and the optional high The inductance value is 18nH. The stabilization network consists of a capacitor and a resistor. In this way, the dual-frequency power amplifier circuit with the dual-port frequency division output function has good gain, higher efficiency, and higher output power, and has good performance in both target frequency bands. Compared with the traditional dual-frequency power amplifier, the adjacent-frequency open-circuit network is integrated into the output matching network, which is equivalent to adding the frequency division function to the dual-frequency amplification, and achieves the dual-frequency amplification and frequency division output at the same time. Referring to Figure 2 and Figure 3, the specific connection method based on the above-mentioned dual-frequency power amplifier circuit with dual-port frequency division output function is described as follows:

The number of more than two output ports may be 2, and the dual-frequency power amplifier circuit with dual-port frequency division output function includes: a first capacitor 9 connected between the input matching network and the input port. The first capacitor 9 in FIG. 3 corresponds to the capacitor C1 in FIG. 2 , with a capacitance value of 20 pF, and the input port 1 in FIG. 3 corresponds to the input port 1 in FIG. 2 .

The input matching network includes a first open branch TL1, a first transmission line TL2, a second open branch TL3, a second transmission line TL4, a third open branch TL5 and a third transmission line TL6, and the second transmission line TL4 and the first transmission line TL2. There is a transition zone between;

The other end of the third transmission line TL6 is connected with the stable network; there is a transition zone between the third transmission line TL6 and the second transmission line TL4.

The stabilization network includes a second capacitor 10 and a first resistor 11. The second capacitor 10 in FIG. 3 corresponds to the capacitor C2 in FIG. 2, with a capacitance value of 5pF, and the first resistor 11 in FIG. 3 corresponds to the resistor R1 in FIG. 2. The resistance value is 50Ω.

The input power supply network includes a fourth transmission line TL7, a first inductor 13, and a second resistor R2. The first inductor 13 can prevent leakage of AC energy. The first inductance 13 in FIG. 3 corresponds to the inductance L1 in FIG. 2 , and the inductance value is 18nH.

The other end of the fourth transmission line TL7 is connected to the DC power supply. In order to facilitate the completion of the power supply, the port corresponding to the other end of the fourth transmission line TL7 is connected to the power supply socket that can be powered by direct current (DC for short) to provide the required transistors. , the port 4 corresponding to the other end of the fourth transmission line TL7 in FIG. 3 corresponds to the port 4 corresponding to the other end of the fourth transmission line TL7 in FIG. 2 .

The output power supply network includes the fifth transmission line TL8 and the second inductance 14 . The second inductor 14 in FIG. 3 corresponds to the inductor L2 in FIG. 2 and has an inductance value of 18nH.

The other end of the fifth transmission line TL8 is connected to the DC power supply. In order to facilitate the completion of the power supply, the port corresponding to the other end of the fifth transmission line TL8 can be connected to the power supply through the DC power supply socket to provide the DC bias required by the transistor, Figure 3 The port 5 corresponding to the other end of the fifth transmission line TL8 corresponds to the port 5 corresponding to the other end of the fifth transmission line TL8 in FIG. 2 .

The synchronous dual-frequency power amplifier circuit with dual-port frequency division output function further includes: a third capacitor 12 . The third capacitor 12 in FIG. 3 corresponds to the capacitor C3 in FIG. 2 , and the capacitance value is 20pF. In this way, the first branch port is connected to the output matching network of the first branch, and the second branch port is connected to the output matching network of the second branch; In this case, the two branch ports are respectively connected to the output matching network of the first branch and the output matching network of the second branch.

Based on the two branch ports, the output matching network is two output matching networks, and the two output matching networks are the output matching network of the first branch and the output matching network of the second branch respectively;

The output matching network of the first branch includes: the branch branch branch branches off the first branch port, the adjacent-frequency open-circuit network of the first branch connected to the first branch port, and the adjacent-frequency open-circuit network connected to the first branch The harmonic tuning and matching network of the first branch between the open-circuit network and the output port of the first branch, wherein the branch branch branches into two branch ports, that is, the two branch ports are respectively the first branch A branch port and a second branch port; each branch port is connected to the output matching network of a branch in a one-to-one correspondence. The specific instructions are as follows:

The transmission branch in the adjacent frequency open circuit network of the first branch is the sixth transmission line TL19, the open circuit branch in the adjacent frequency open circuit network of this branch is a fourth open circuit branch TL11, and the adjacent frequency open circuit network includes the sixth transmission line TL19 and a fourth open branch TL11, where,

One end of the sixth transmission line TL19 is connected to a branch port in the branch branch port, and the other end of the sixth transmission line TL19 is connected to the other end of the fourth open branch TL11 and the seventh branch in the harmonic tuning and matching network of this branch. At the connection of one end of the transmission line TL13, one end of the fourth open branch TL11 is open, and the other end of the fourth open branch TL11 is connected to the other end of the sixth transmission line TL19 and the seventh transmission line TL13 in the harmonic tuning and matching network of this branch. connection at one end.

The harmonic tuning and matching network of the first branch includes: a seventh transmission line TL13, a fifth open-circuit branch TL15, an eighth transmission line TL17 and a sixth open-circuit branch TL23, wherein the open-circuit branch of the harmonic tuning and matching network is used for To create an open short circuit condition for the second and third harmonics, the transmission line of the harmonic tuning and matching network is used to transmit the open circuit short circuit condition of the harmonic to the drain plane of the transistor and adjust the impedance matching. The specific connection method is described as follows:

One end of the seventh transmission line TL13 is connected to the connection between the sixth transmission line TL19 and the fourth open-circuit branch TL11, the other end of the seventh transmission line TL13 is connected to the connection of the other end of the fifth open-circuit branch TL15 and one end of the eighth transmission line TL17. One end of the five open-circuit branches TL15, and the other end of the fifth open-circuit branch TL15 is connected to the connection between the other end of the seventh transmission line TL13 and one end of the eighth transmission line TL17;

The other end of the eighth transmission line TL17 is connected to the connection with the other end of the sixth open-circuit branch TL23 and one end of the ninth transmission line TL21 in one output port of this branch, one end of the sixth open-circuit branch TL23 is open, and the sixth open-circuit branch The other end of the node TL23 is connected to the connection between the other end of the eighth transmission line TL17 and one end of the ninth transmission line TL21.

The output matching network of the second branch includes: the branch branch branch branches off the second branch port, the adjacent-frequency open-circuit network of the second branch connected to the second branch port, and the adjacent-frequency network connected to the second branch A harmonic tuning and matching network of the second branch between the open circuit network and the output port of the second branch. The specific instructions are as follows:

The transmission branch in the adjacent frequency open circuit network of the second branch is the tenth transmission line TL10, the open circuit branch in the adjacent frequency open circuit network of this branch is a seventh open circuit branch TL12, and the adjacent frequency open circuit network includes the tenth transmission line TL10 and a seventh open branch TL12, where,

One end of the tenth transmission line TL10 is connected to one branch port in the branch branch port, and the other end of the tenth transmission line TL10 is connected to the other end of the seventh open branch TL12 and the seventh branch in the harmonic tuning and matching network of this branch. At the connection of one end of the transmission line TL13, one end of the seventh open branch TL12 is open, and the other end of the seventh open branch TL12 is connected to the other end of the tenth transmission line TL10 and the seventh transmission line TL13 in the harmonic tuning and matching network of this branch. connection at one end.

The harmonic tuning and matching network of the second branch includes: an eleventh transmission line TL14, an eighth open-circuit branch TL16, a twelfth transmission line TL18 and a ninth open-circuit branch TL20, wherein the open-circuit branch of the harmonic tuning and matching network The transmission lines of the harmonic tuning and matching network are used to create the open short circuit condition of the second and third harmonics to transmit the open circuit short circuit condition of the harmonics to the drain plane of the transistor and adjust the impedance matching. The specific connection method is described as follows:

One end of the eleventh transmission line TL14 is connected to the connection between the tenth transmission line TL10 and the seventh open-circuit branch TL12, and the other end of the eleventh transmission line TL14 is connected to the connection between the other end of the eighth open-circuit branch TL16 and one end of the twelfth transmission line TL18 , one end of the eighth open-circuit branch TL16, and the other end of the eighth open-circuit branch TL16 is connected to the connection between the other end of the eleventh transmission line TL14 and one end of the twelfth transmission line TL18;

The other end of the twelfth transmission line TL18 is connected to the connection with the other end of the ninth open branch TL20 and one end of the ninth transmission line TL21 in one output port of this branch. One end of the ninth open branch TL20 is open, and the ninth open The other end of the branch TL20 is connected to the connection between the other end of the twelfth transmission line TL18 and one end of the ninth transmission line TL21.

The output port of the first branch includes the ninth transmission line TL21 and one output port of this branch. One end of the ninth transmission line TL21 is connected to the eighth transmission line TL17 and the other end is connected to the other end of the sixth open-circuit branch TL23. The ninth transmission line The other end of TL21 is connected to an output port of this branch.

The characteristic impedance of the ninth transmission line TL21 used for the connection of the output port is 50Ω, the length is arbitrary, and the influence on the index of the output network is small.

The output port of the second branch includes the thirteenth transmission line TL22 and one output port of this branch. One end of the thirteenth transmission line TL22 is connected to the eighth transmission line TL17 and the other end is connected to the other end of the sixth open-circuit branch TL23. The other end of the thirteen transmission line TL22 is connected to an output port of this branch.

The characteristic impedance of the thirteenth transmission line TL22 is 50Ω for the connection of the output port, and the length is arbitrary, which has little influence on the indicators of the output network.

The sixth open-circuit branch TL23 in the first branch is the same as the sixth transmission line TL19, and other components are the same as those of the second branch. A single branch of the output network in the embodiment of the present invention has a very high reflection coefficient to the operating frequency of another branch, which can achieve the suppression effect on adjacent frequencies, and can achieve good matching for the operating frequency of this branch. After the first branch and the second branch form a fusion output network, the function of dual frequency matching and simultaneous frequency division output can be realized. And the input signal will only be lost after passing through the multi-frequency power amplifier circuit, compared with the loss after passing through the amplifier and then passing through the frequency divider again.

In the conversion from the schematic diagram of Figure 2 to the layout of Figure 3, the connection method of each microstrip line and the open-circuit branch is as follows: between the microstrip lines of different widths, the width varies from 0.2mm to 1mm, and the width of both ends is The two connected sections of the microstrip line width are coupled with a trapezoidal transition with the microstrip line, so as to achieve a smooth transition of the microstrip line width. Between the microstrip line and the open branch, a microstrip line whose length is the width of the open branch and the width is the width of the microstrip line is used for coupling, so as to achieve the effect of complete connection.

Passive devices such as capacitors, inductors, and resistors are all surface-mounted devices with a specification of 0603. Specifically, the length is 1.6mm and the width is 0.8mm. Solder is used for solder coupling between passive components and microstrip line pads. The transistor is also a surface mount device, which is pressed with a screw and a heat sink, and the coupling method with the circuit is also soldered.

The length and width identification numbers of the transmission lines in FIG. 3 correspond to the transmission line numbers in FIG. 2 . The specific instructions are as follows:

The input matching network after the input port in Figure 3 is composed of three transmission lines and three open-circuit branches. The line width W1 of the first open branch node is 0.4mm, and the line length L1 is 19mm. The line width W2 of the first transmission line is 3.8 mm, and the line length L2 is 6 mm. The line width W3 of the second open-circuit branch is 5mm, and the line length L3 is 20mm. The line width W4 of the second transmission line is 1.5 mm, the line length L4 is 11.5 mm, and there is a transition zone with a width of 1 mm between the second transmission line and the first transmission line. The line width W5 of the third open-circuit branch is 5mm, and the line length L5 is 18mm. The line width W6 of the third transmission line is 0.3 mm, the line length L6 is 11.5 mm, and there is a transition zone with a width of 0.2 mm between the third transmission line and the second transmission line.

FIG. 4 is a schematic diagram of a simulation result of an input impedance curve of an input matching network in an embodiment of the present invention. The black curve is the input impedance curve of the input matching network and the connection port of the transistor, and the two multi-curve concentric circle clusters on both sides are the equivalent efficiency circles obtained by the source-pull simulation of the transistor at 3.5GHz and 5GHz. At 3.5GHz and 5GHz, the impedance of the input matching network can fall within the optimal efficiency circle of the iso-efficiency curve. The input matching network of the embodiment of the present invention provides a good input dual-frequency matching for a simultaneous dual-frequency power amplifier circuit with a dual-port frequency division output function, can be accurately matched in two target frequency bands, and has a wider bandwidth .

The output matching network located behind the third capacitor in FIG. 3 includes two branches, wherein the first lateral branch is a 3.5 GHz output branch, which is connected to the output port of the first branch.

The first branch consists of a three-segment transmission line and three open-circuit branches. The line width W9 of the sixth transmission line is 1.6 mm, and the line length L9 is 8.8 mm. The line width W11 of the fourth open branch node is 0.4mm, and the line length L11 is 8.8mm. The line width W13 of the seventh transmission line is 1.4 mm, the line length L13 is 7.2 mm, and there is a transition zone with a width of 0.1 mm between the seventh transmission line and the sixth transmission line. The line width W15 of the fifth open branch is 2mm, and the line length L15 is 7.4mm. The line width W17 of the eighth transmission line is 3.2mm, the line length L17 is 1.0mm, and there is a transition zone of 0.2mm width between the eighth transmission line, the seventh transmission line and the output port. The line width W19 of the sixth open branch node is 1.0mm, and the line length L19 is 4.9mm.

According to the simulation effect, the second branch removes a section of transmission line and an open branch based on the schematic diagram, and consists of two transmission lines and two open branches. The line width W10 of the tenth transmission line is 1.4 mm, and the line length L10 is 12.8 mm. The line width W12 of the seventh open branch node is 1.6mm, and the line length L12 is 12.3mm. The line width W14 of the eleventh transmission line is 3.0 mm, the line length L14 is 1.0 mm, and there is a 0.2 mm width transition zone between the eleventh transmission line, the tenth transmission line and the output port. The line width W16 of the eighth open branch node is 1.4 mm, and the line length L16 is 3.0 mm.

The output port of the first branch and the input port of the second branch are all microstrip lines with a width of WP, which are used to connect the ports, and the length is arbitrary, greater than 3mm.

FIG. 5 shows the matching situation of the output matching network in the embodiment of the present invention. In the first branch with an operating frequency of 3.5GHz and a frequency of 5GHz, S ₂₁ is lower than -60dBm. For the second branch with an operating frequency of 5GHz, at a frequency of 3.5GHz, S ₂₁ is lower than -30dBm. The two branches in the embodiment of the present invention form a fusion output network, each branch completes the matching of the target frequency and also equivalently opens the other frequency. After the two branches form a network, the dual-port frequency division output is realized. Function.

Figure 6 shows the small signal gain and the return loss parameters of the input and output ports according to the embodiment of the present invention; Figure 6 shows the parameters of the output port of the first branch with a center frequency of 3.5GHz , as shown in Figure 7, the parameters of the output port of the second branch at the center frequency of 5GHz. At the frequency of 3.5GHz, the small-signal gain of the simultaneous dual-frequency power amplifier circuit with dual-port frequency division output function can reach 14.5dB, the frequency range of the gain above 10dB is 3.37GHz to 3.63GHz, and the bandwidth reaches 0.26GHz. 3.5GHz input and output port return loss is less than -10dB. At 5GHz frequency, the small-signal gain of the simultaneous dual-frequency power amplifier circuit with dual-port frequency division output function can reach 12.0dB, the frequency range of gain above 10dB is 4.94GHz to 5.05GHz, and the bandwidth reaches 0.12GHz. The return loss of the 5GHz input and output ports is less than -10dB. The embodiments of the present invention have good small signal performance.

The simulation results of the variation of gain, output power and efficiency with input power according to the embodiment of the present invention are shown in Fig. 8; Fig. 8 shows the parameters of the output port of the first branch at a frequency of 3.5 GHz, and Fig. 9 shows the second branch The parameters of the output port at a frequency of 5GHz. At the frequency of 3.5GHz, the -3dB gain compression point is the input power of 26.7dBm, the output power at this time can reach 38.4dBm, and the efficiency can reach 55%. When the input power is 29.4dBm, the efficiency reaches the highest point, which is 56.8%, and the output power is 39.3dBm at this time. At 5GHz frequency, the -3dB gain compression point is the input power of 30.1dBm, the output power at this time can reach 39.2dBm, and the efficiency can reach 47.4%. When the input power is 30.8dBm, the efficiency reaches the highest point, which is 47.7%, and the output power is 39.4dBm at this time. The embodiment of the present invention has good output power and efficiency under the large signal of the center frequency.

Fig. 10 shows the simulation results of the variation of gain, output power and efficiency with frequency under the input of 29dBm according to the embodiment of the present invention; wherein Fig. 10 shows the parameters of the output port of the first branch when the center frequency is 3.5GHz , Figure 11 shows the parameters of the output port of the second branch at a center frequency of 5GHz. At 3.5GHz, the maximum efficiency of the simultaneous dual-frequency power amplifier circuit with dual-port frequency division output function is 56.5%, the output power is 39.1dBm, and the gain is 10.1dB. The efficiency is above 40% in the frequency range from 3.36GHz to 3.66GHz, and the bandwidth reaches 0.3GHz. At 5GHz, the maximum efficiency of the simultaneous dual-frequency power amplifier circuit with dual-port frequency division output function is 45.8%, the output power is 38.7dBm, and the gain is 9.7dB. The efficiency is over 40% in the frequency range from 4.95GHz to 5.06GHz, and the bandwidth reaches 0.11GHz. The embodiments of the present invention have good power efficiency performance and wider bandwidth under large signals in two frequency bands.

The size of the entire circuit is 47.6mm × 87.2mm, which has the characteristics of miniaturization and integration, and is very conducive to device packaging. At the same time, the space occupied by the subsequent frequency divider is saved, and the signal can be directly sent to the antenna for transmission. The simultaneous dual-frequency power amplifier circuit with dual-port frequency division output function formed by the fusion network has good performance and will achieve remarkable results in the miniaturization of the entire system.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A co-time multi-frequency power amplifier circuit with multi-port frequency-division output, comprising:

a substrate;

a power amplifier circuit disposed on a top layer of the substrate, wherein,

the power amplifier circuit includes: the input port, more than two output ports, the input matching network, the stabilizing network, the power supply network, the transistors and the output matching networks with the same number as the output ports are respectively connected between the input port and the output ports; the output matching network and the output ports connected with the output matching network form a branch, and the number of the branches is the same as that of the output ports;

the output matching network for each branch comprises: the branch circuit comprises a branch port, an adjacent frequency open circuit network and a harmonic tuning and matching network, wherein the branch port is divided from a branch fork port; the adjacent frequency open circuit network comprises: the number of the transmission lines and the open-circuit branch nodes is the same as that of other branches except the branch;

the adjacent frequency open circuit network is used for transmitting the radio frequency signal of the branch and reflecting the preset radio frequency signals of other branches, and the length of the open circuit branch in the adjacent frequency open circuit network is a value of one-quarter wavelength of the preset radio frequency signals of other branches;

the harmonic tuning and matching network is used for adjusting the harmonic impedance of the radio-frequency signal of the branch circuit and matching the impedance of the output port of the branch circuit to the optimal impedance required by the transistor to obtain the adjusted radio-frequency signal;

and the output port of each branch is used for outputting one path of the adjusted radio-frequency signal as one path of single-frequency signal.

2. The co-time multi-frequency power amplifier circuit with multi-port frequency-division output capability of claim 1, wherein the co-time multi-frequency power amplifier circuit with multi-port frequency-division output capability further comprises: a third capacitor and a first capacitor;

one end of the third capacitor is connected to a drain electrode bonding pad of the transistor, and the other end of the third capacitor is connected to the branch fork;

the first capacitor is connected between the input matching network and the input port, and one end of the first capacitor is connected with the input port.

3. The co-time multi-frequency power amplifier circuit with a multi-port frequency-division output function according to claim 2, wherein in the case where the two or more output ports are two output ports, the transmission line in the adjacent-frequency open network is a sixth transmission line, the open-circuit stub in the adjacent-frequency open network is a fourth open-circuit stub,

sixth transmission line one end with a branch road port in the branch road bifurcation is connected, the sixth transmission line other end connect in the other end of fourth branch section with the junction of the seventh transmission line one end in the harmonic tuning and matching network, fourth branch section one end is opened circuit, the fourth branch section other end connect in the other end of sixth transmission line with the junction of seventh transmission line one end in the harmonic tuning and matching network.

4. A co-time multi-frequency power amplifier circuit with multi-port crossover output capability as defined in claim 3, wherein the harmonic tuning and matching network comprises: the transmission line in the harmonic tuning and matching network and the open-circuit branch node in the harmonic tuning and matching network are paired and have the same number, and the number of the transmission line in the harmonic tuning and matching network and the number of the open-circuit branch node in the harmonic tuning and matching network is not less than 1 and not more than 3.

5. The co-time multi-frequency power amplifier circuit with multi-port crossover output capability of claim 4, wherein the transmission line in the harmonic tuning and matching network comprises a seventh transmission line and the open-circuit leg in the harmonic tuning and matching network comprises a fifth open-circuit leg, wherein,

one end of the seventh transmission line is connected to the joint of the sixth transmission line and the fourth branch section, the other end of the seventh transmission line is connected to the joint of the other end of the fifth open-circuit branch section and one end of the transmission line in one output port of the branch circuit, one end of the fifth open-circuit branch section is open-circuited, and the other end of the fifth open-circuit branch section is connected to the joint of the other end of the seventh transmission line and one end of the transmission line in one output port of the branch circuit.

6. The co-time multi-frequency power amplifier circuit with multi-port frequency-division output function of claim 5, wherein the output ports comprise a ninth transmission line and an output port of the local branch, one end of the ninth transmission line is connected to the other end of the last transmission line in the harmonic tuning and matching network and connected to the other end of the last open stub in the harmonic tuning and matching network, and the other end of the ninth transmission line is connected to an output port of the local branch.

7. The co-time multi-frequency power amplifier circuit with multi-port crossover output capability of claim 6, wherein said input matching network comprises: three transmission lines and three open-circuit stubs, wherein the three transmission lines in the input matching network are respectively a first transmission line, a second transmission line and a third transmission line, the three open-circuit stubs in the input matching network are respectively a first open-circuit stub, a second open-circuit stub and a third open-circuit stub, wherein,

one end of the first open-circuit branch node is open-circuit, and the other end of the first open-circuit branch node is connected to the joint of the other end of the first capacitor and one end of the first transmission line;

one end of the first transmission line is connected to the joint of the other end of the first capacitor and the other end of the first open-circuit branch node, the other end of the first transmission line is connected to the joint of the other end of the second open-circuit branch node and the other end of the second transmission line, one end of the second open-circuit branch node is open-circuit, and the other end of the second open-circuit branch node is connected to the joint of the other end of the first transmission line and the other end of the second transmission line;

one end of the second transmission line is connected to the junction of the second open-circuit branch section and the first transmission line, the other end of the second transmission line is connected to the junction of the other end of the third open-circuit branch section and one end of the third transmission line, one end of the third open-circuit branch section is open-circuited, and the other end of the third open-circuit branch section is connected to the junction of the other end of the second transmission line and one end of the third transmission line.

8. A co-time multi-frequency power amplifier circuit with multi-port frequency-division output capability as claimed in claim 7 wherein said stabilizing network is connected between said input matching network and said transistor source, said stabilizing network comprising: a second capacitor and a first resistor, wherein,

one end of the second capacitor, which is connected with the first resistor in parallel, is connected with the other end of the third transmission line, and the other end of the second capacitor, which is connected with the first resistor in parallel, is connected with the grid electrode bonding pad of the transistor.

9. A co-time multi-frequency power amplifier circuit with multi-port crossover output capability as defined in claim 8, wherein the power supply network comprises: an input power supply network and an output power supply network; wherein,

the input power supply network includes: a fourth transmission line and a first inductor, wherein,

one end of the first inductor is connected to the other end of the second capacitor, which is connected with the first resistor in parallel, and the other end of the first inductor is connected with one end of a fourth transmission line, and the other end of the fourth transmission line is connected with a direct-current power supply;

the output power supply network includes: the transistor comprises a fifth transmission line and a second inductor, wherein one end of the second inductor is connected to the drain electrode bonding pad of the transistor, the other end of the second inductor is connected with one end of the fifth transmission line, and the other end of the fifth transmission line is connected with a direct-current power supply.

10. A co-time multi-frequency power amplifier circuit with multi-port crossover output capability as defined in claim 9, wherein the input supply network further comprises: and the second resistor is connected between the other end of the fourth transmission line and the direct-current power supply.

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