CN219938367U - Signal phase compensating device and phased array - Google Patents

Abstract

The utility model relates to the technical field of communication, in particular to a signal phase compensation device and a phased array, which aim to solve the problem of efficiently and accurately compensating the phase of a signal. The device provided by the utility model comprises a first phase shifter, a quadrature coupler, a quadrature modulator and a voltage acquirer; the quadrature coupler is used for acquiring a first in-phase signal and a first quadrature signal of a first path of signals and a second in-phase signal and a second quadrature signal of a second path of signals; the quadrature modulator is used for quadrature modulating the first in-phase signal, the second in-phase signal and the first quadrature signal and the second quadrature signal; the voltage acquirer is used for acquiring a phase compensation control voltage according to the quadrature modulation signal; the first phase shifter is used for respectively carrying out phase compensation on the first path of signal and the second path of signal according to the phase compensation control voltage. Based on the device, the phase compensation control voltage can be accurately obtained before the phase compensation is carried out, and the phase compensation can be rapidly and accurately completed according to the phase compensation control voltage.

Description

Signal phase compensation device, phased array

Technical field

The utility model relates to the field of communication technology, in particular to a signal phase compensation device and a phased array.

Background technique

When receiving signals from a signal source through a device with multiple signal channels (such as an array antenna), it is necessary to add the signals received by each channel to obtain the final received signal. The frequencies of the signals of each channel are the same. However, due to the different transmission paths of the signals received by each channel, there will be a certain phase difference between the signals. If the signals with phase differences are directly added, it will greatly affect the accuracy of the final received signal. sex. Therefore, before adding the signals, phase compensation must be performed on each signal to make the phases of each signal consistent, and then the phase-compensated signals are added. At this time, the signal strength of the summed signal reaches the maximum value. .

However, the current conventional signal phase compensation device cannot accurately obtain the phase difference between each signal and perform phase compensation based on the phase difference. It can only perform feedback control on the phase compensation of each signal based on the signal strength of the summed signal until When the signal strength of the summed signal reaches the maximum value, and then the phase compensation is stopped, it will take a long time to complete the phase compensation, which affects the communication efficiency.

Accordingly, a new technical solution is needed in this field to solve the above problems.

Utility model content

In order to overcome the above defects, the present utility model is proposed to provide a signal phase compensation device and a phased array that solve or at least partially solve the technical problem of how to perform phase compensation on signals efficiently and accurately.

In a first aspect, a signal phase compensation device is provided. The device includes a voltage acquisition component and a first phase shifter. The voltage acquisition component includes an orthogonal coupler, an orthogonal modulator and a voltage acquirer connected in sequence; The quadrature coupler is used to obtain a first in-phase signal and a first orthogonal signal that are respectively the same and orthogonal to the phase of the first signal, and to obtain a second signal that is the same and orthogonal to the second signal. In-phase signal and second orthogonal signal; the orthogonal modulator is used to perform orthogonal modulation on the first in-phase signal, the first orthogonal signal, the second in-phase signal and the second orthogonal signal to obtain orthogonal modulation signal; the voltage obtainer is used to obtain the phase compensation control voltage of the first signal and the second signal respectively according to the quadrature modulation signal; the first phase shifter is used to obtain the phase compensation control voltage of the first signal and the second signal according to the quadrature modulation signal. The phase compensation control voltage of the channel signal is used to perform phase compensation on the first channel signal and the second channel signal respectively.

In a technical solution of the above signal phase compensation device, the orthogonal coupler includes: a first orthogonal coupling module, which is used to obtain a first in-phase signal and a first in-phase signal that are the same and orthogonal to the phase of the first signal respectively. The first orthogonal signal; the second orthogonal coupling module, which is used to obtain the second in-phase signal and the second orthogonal signal that are the same and orthogonal to the phase of the second signal respectively.

In a technical solution of the above signal phase compensation device, the quadrature modulator includes: a first multiplier, which is used to multiply the first in-phase signal and the second quadrature signal to obtain the first modulated signal. ; A second multiplier, which is used to multiply the second in-phase signal and the first quadrature signal to obtain the second modulated signal; a subtractor, which is used to multiply the first modulated signal and the second modulated signal; subtract to obtain the quadrature modulated signal.

In a technical solution of the above signal phase compensation device, the voltage acquisition component further includes a first amplifier, which is connected to the quadrature coupler and the quadrature modulator respectively; the first amplifier is used to respectively The first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal are signal amplified; the quadrature modulator is also used to amplify the first in-phase signal, the first quadrature signal after signal amplification. The orthogonal signal, the second in-phase signal and the second orthogonal signal are subjected to orthogonal modulation to obtain an orthogonal modulated signal.

In a technical solution of the above signal phase compensation device, the number of the first amplifiers is four, and each first amplifier is used to compare the first in-phase signal, the first quadrature signal, the second in-phase signal and the third signal respectively. Two orthogonal signals are used for signal amplification.

In a technical solution of the above signal phase compensation device, the voltage acquirer includes: a DC component acquisition module, which is used to acquire the DC component in the quadrature modulation signal; the voltage acquirer is also used to obtain the DC component according to the DC component, obtain the phase compensation control voltage of the first signal and the second signal respectively.

In a technical solution of the above signal phase compensation device, the DC component acquisition module includes a low-pass filter, and the low-pass filter is used to perform low-pass filtering on the quadrature modulation signal to obtain the DC component.

In a technical solution of the above signal phase compensation device, the DC component acquisition module further includes a first DC unit and a second DC unit; the first DC unit is used to preset the proportion based on the first signal. And obtain the DC component corresponding to the first signal according to the DC component; the second DC unit is used to obtain the DC component corresponding to the second signal based on the preset ratio corresponding to the second signal and according to the DC component; The voltage acquirer is also used to obtain the phase compensation control voltage of the first signal according to the DC component corresponding to the first signal, and obtain the phase compensation control voltage of the second signal according to the DC component corresponding to the second signal; wherein , the sum of the corresponding preset ratios of the first signal and the second signal is 1.

In a technical solution of the above signal phase compensation device, the voltage acquisition component further includes a second amplifier, which is connected to the DC component acquisition module; the second amplifier is used to convert the DC acquired by the DC component acquisition module. The component is amplified; the voltage obtainer is also used to obtain the phase compensation control voltage of the first signal and the second signal respectively according to the amplified DC component.

In a technical solution of the above signal phase compensation device, the device further includes a second phase shifter connected to the voltage acquisition component; the voltage acquisition component is also used to compare the first signal with the second signal after phase compensation according to the phase compensation. signal, obtain the phase compensation control voltage of the first signal and the second signal respectively, and output the phase compensation control voltage obtained again to the second phase shifter; the second phase shifter is used to obtain the phase compensation control voltage according to the obtained signal again. The phase compensation control voltage is used to perform phase compensation again on the first signal and the second signal after phase compensation.

In a technical solution of the above signal phase compensation device, the device further includes a third amplifier, which is connected to the voltage acquisition component and the second phase shifter respectively; the third amplifier is used to adjust the voltage again The obtained phase compensation control voltage is amplified and the amplified phase compensation control voltage is output to the second phase shifter; the second phase shifter is also used to respectively perform phase compensation according to the amplified phase compensation control voltage. The subsequent first channel signal and the second channel signal are phase compensated again; wherein, the gain of the third amplifier is the reciprocal of the preset gain product, and the preset gain product is the voltage acquisition component and the second phase shifting component. The product of their corresponding gains.

In a second aspect, a phased array is provided, the phased array comprising:

A plurality of phase shifters; a control device for respectively controlling each phase shifter to perform phase compensation on the signals received by each antenna in the array antenna; the control device includes the signal phase compensation device provided in the first aspect; signal superposition The device is used to superimpose and output the signals received by each antenna after phase compensation.

One or more of the above technical solutions of the present invention have at least one or more of the following beneficial effects:

In the technical solution for implementing the signal phase compensation device provided by the present invention, the device includes a voltage acquisition component and a first phase shifter. The voltage acquisition component includes an orthogonal coupler, an orthogonal modulator and a voltage acquirer connected in sequence. Specifically, the quadrature coupler can be used to obtain a first in-phase signal and a first quadrature signal that are respectively the same and orthogonal to the phase of the first signal, and to obtain the same phase and orthogonal to the second signal. the second in-phase signal and the second quadrature signal; the quadrature modulator can be used to perform quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal, to Obtain the quadrature modulation signal; the voltage acquirer can be used to obtain the phase compensation control voltage of the first signal and the second signal respectively according to the quadrature modulation signal; the first phase shifter can be used to obtain the phase compensation control voltage of the first signal and the second signal according to the quadrature modulation signal. The phase compensation control voltage of the two signals performs phase compensation on the first signal and the second signal respectively. Based on the above structure, before phase compensation is performed, a phase compensation control voltage whose voltage phase can represent the phase difference between the first signal and the second signal can be accurately obtained. According to the phase compensation control voltage, the phase compensation control voltage can be quickly and accurately Completing phase compensation overcomes the shortcoming of the existing technology that it takes a long time to complete phase compensation.

In the technical solution for implementing the phased array of the present invention, the phased array may include a plurality of phase shifters, a control device and a signal adder, and the control device may include the aforementioned signal phase compensation device. Specifically, the control device can be used to separately control each phase shifter to perform phase compensation on the signals received by each antenna in the array antenna, and the signal superpositioner can be used to perform signal superposition and output on the signals received by each antenna after phase compensation. . Based on the above phased array, the phase compensation efficiency of the signal received by the array antenna can be improved, thereby improving the communication efficiency and communication reliability of the array antenna.

Description of the drawings

The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. Those skilled in the art can easily understand that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. in:

Figure 1 is a schematic diagram of the main structure of a signal phase compensation device according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the main structure of an orthogonal coupler according to an embodiment of the present invention;

Figure 3 is a schematic diagram of the main structure of a quadrature modulator according to an embodiment of the present invention;

Figure 4 is a schematic diagram of the signal phase difference detection principle according to one embodiment of the present invention;

Figure 5 is a schematic diagram 1 of the signal phase compensation principle according to an embodiment of the present invention;

Figure 6 is a schematic diagram 2 of the signal phase compensation principle according to an embodiment of the present invention;

Figure 7 is a schematic diagram 3 of the signal phase compensation principle according to an embodiment of the present invention;

Figure 8 is a schematic diagram 4 of the signal phase compensation principle according to an embodiment of the present invention;

Figure 9 is a schematic diagram 1 of the signal phase compensation effect according to an embodiment of the present invention;

Figure 10 is a schematic diagram 2 of the signal phase compensation effect according to an embodiment of the present invention;

Figure 11 is a schematic diagram 3 of the signal phase compensation effect according to an embodiment of the present invention;

Figure 12 is a schematic diagram 5 of the signal phase compensation principle according to an embodiment of the present invention;

Figure 13 is a schematic diagram of the main structure of a phased array according to an embodiment of the present invention.

Detailed ways

Some embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

In the description of the present invention, the term "A and/or B" means all possible combinations of A and B, such as just A, just B or A and B. The term "at least one A or B" or "A and "At least one of B" has a similar meaning to "A and/or B" and may include just A, just B, or both A and B. The singular terms "a" and "the" may also include the plural form.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of the main structure of a signal phase compensation device according to an embodiment of the present invention. As shown in Figure 1, the signal phase compensation device in the embodiment of the present invention mainly includes a voltage acquisition component and a first phase shifter. The voltage acquisition component includes an orthogonal coupler, an orthogonal modulator and a voltage acquirer connected in sequence. The quadrature coupler, quadrature modulator, voltage acquirer and first phase shifter are described below respectively.

1. Orthogonal coupler

The quadrature coupler can be used to obtain a first in-phase signal and a first quadrature signal that are the same and orthogonal to the phase of the first signal, and to obtain a first in-phase signal and a first quadrature signal that are the same and orthogonal to the second signal. A second in-phase signal and a second quadrature signal.

The first signal and the second signal are electrical signals with the same signal frequency. The first and second signals can be low-frequency signals (for example, signals with a signal frequency less than or equal to the set threshold), or high-frequency signals ( For example, the signal frequency is greater than the set threshold). In some embodiments, the first and second signals may be electrical signals converted from millimeter wave signals. The electromagnetic wave frequency of millimeter wave signals is usually between 30 GHz and 300 GHz, and is a high-frequency signal. Among them, the signal frequency of the electrical signal converted from the millimeter wave signal is the same as the electromagnetic wave frequency of the millimeter wave signal, so the electrical signal converted from the millimeter wave signal is still a high-frequency signal. In some embodiments, the first and second signals may be electrical signals converted from radio frequency signals, and the signal frequency of the electrical signal is the same as the signal frequency of the radio frequency signal.

The phase difference between the first orthogonal signal and the first channel signal, and the phase difference between the second orthogonal signal and the second channel signal are the same. In some implementations, a signal with a phase difference of 90° from the first signal can be acquired as the first orthogonal signal, and a signal with a phase difference of 90° from the second signal can be acquired as the second orthogonal signal. In some implementations, a signal with a phase difference of 270° from the first signal can also be acquired as the first orthogonal signal, and a signal with a phase difference of 270° from the second signal can be acquired as the second orthogonal signal.

It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the orthogonal coupler, and use conventional implementation methods in the field of signal processing technology, such as software methods, to configure the functions of the orthogonal coupler, as long as The quadrature coupler can acquire a first in-phase signal and a first quadrature signal that are respectively the same and orthogonal to the first signal, and acquire a second in-phase signal that is the same and orthogonal to the second signal. The signal and the second orthogonal signal are sufficient. The embodiment of the present invention does not specifically limit the type and model of the device used in the orthogonal coupler, nor does it specifically limit the method for realizing the function of the orthogonal coupler.

2. Quadrature modulator

The quadrature modulator may be used to perform quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal to obtain a quadrature modulated signal. By performing orthogonal modulation on the above four signals, the phase difference between the first signal and the second signal can be converted into the phase of the quadrature modulated signal, that is, the phase of the quadrature modulated signal can represent the first signal The phase difference with the second signal.

It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the quadrature modulator, and use conventional implementation methods in the field of signal processing technology, such as software methods, to configure the functions of the quadrature modulator, as long as The quadrature modulator can perform quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal to obtain an quadrature modulated signal. The embodiment of the present invention does not perform quadrature modulation. The type and model of the device used in the device and the implementation method of its function are specifically limited.

3. Voltage Getter

The voltage acquirer can be used to acquire the phase compensation control voltages of the first signal and the second signal respectively according to the quadrature modulation signal. The first signal and the second signal are both electrical signals. The orthogonal modulation signal obtained based on these two signals is also an electrical signal. The phases of the first and second signals can be obtained based on the voltage component of the electrical signal. Compensation control voltage.

It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the voltage acquirer, and use conventional implementation methods in the field of signal processing technology such as software methods to configure the function of the voltage acquirer, as long as the voltage acquisition The device can obtain the phase compensation control voltage of the first signal and the second signal respectively according to the quadrature modulation signal. The embodiment of the present invention does not make any changes to the type and model of the device used by the voltage acquirer and the implementation method of its function. Specific limitations.

4. The first phase shifter

The first phase shifter may be used to perform phase compensation on the first signal and the second signal respectively according to the phase compensation control voltages of the first signal and the second signal.

Based on the above-mentioned signal phase compensation device composed of a quadrature coupler, a quadrature modulator, a voltage acquirer and a first phase shifter, the accurate phase compensation control voltage can be obtained before phase compensation is performed, thereby quickly and accurately The phase compensation can be completed instantly, which overcomes the shortcoming of the existing technology that it takes a long time to complete the phase compensation.

In an application scenario based on the above device embodiment, millimeter wave signals emitted by the signal source are received through a phased array radar (Phased ArrayRadar). Since the transmission paths of the signals received by each antenna in the phased array radar are different, each There is a phase difference between the signals. In this case, the signal phase compensation device of the above device embodiment can be used to perform phase compensation on each channel of signal, and the signals of each channel after phase compensation are superimposed to obtain a superimposed signal, and then the superimposed signal is phase controlled. Other signal processing for array radar.

The quadrature coupler, quadrature modulator and voltage acquirer are further explained below.

1. Orthogonal coupler

Referring to FIG. 2 , in some embodiments, the orthogonal coupler may include a first orthogonal coupling module and a second orthogonal coupling module. The first orthogonal coupling module can receive the first signal and be used to obtain the first in-phase signal and the first orthogonal signal whose phases are the same and orthogonal to the first signal respectively. The second orthogonal coupling module can receive the second channel signal and obtain a second in-phase signal and a second orthogonal signal that are the same and orthogonal to the phase of the second channel signal respectively.

It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the first orthogonal coupling module and the second orthogonal coupling module, and configure them using conventional implementation methods in the field of signal processing technology, such as software methods. The function of each unit in the first orthogonal coupling module and the second orthogonal coupling module is as long as the first orthogonal coupling module can obtain the first in-phase signal and the first orthogonal signal and the second orthogonal coupling module can obtain The second in-phase signal and the second orthogonal signal are sufficient. The embodiments of the present invention do not specifically limit the types and models of devices used in the first orthogonal coupling module and the second orthogonal coupling module, as well as the methods for realizing functions.

2. Quadrature modulator

Referring to FIG. 3 , in some embodiments, the quadrature modulator may include a first multiplier, a second multiplier, and a subtractor. The first multiplier may be used to multiply the first in-phase signal and the second quadrature signal to obtain the first modulated signal. The second multiplier may be used to multiply the second in-phase signal and the first quadrature signal to obtain the second modulated signal. The subtractor may be used to subtract the first modulation signal and the second modulation signal to obtain a quadrature modulation signal. It should be noted that those skilled in the art can use conventional multipliers and subtractors in the field of electronic device technology to construct an orthogonal modulator. The embodiments of the present invention do not specifically limit the types and models of devices used in the orthogonal modulator. .

Referring to FIG. 4 , FIG. 4 exemplarily illustrates the principle of obtaining phase differences based on quadrature modulation signals. As shown in Figure 4, the first signal is expressed as A ₁ sin(ω ₀ t+θ _det /2), its phase is expressed as A ₁ ∠(θ _det /2), and the second signal is expressed as A ₂ sin( ω ₀ t-θ _det /2), its phase is expressed as A ₂ ∠(-θ _det /2), and the phase difference between the first and second signals can be expressed as A ₁ /A ₂ ∠(θ _det ) .

The first in-phase signal is expressed as αA ₁ sin(ω ₀ t+θ _det /2), its phase is expressed as αA ₁ ∠(θ _det /2), and the first orthogonal signal is expressed as αA ₁ sin(ω ₀ t+ θ _det /2+90°), its phase is expressed as αA ₁ ∠(θ _det /2+90°),

The second in-phase signal is expressed as αA ₂ sin(ω ₀ t-θ _det /2), its phase is expressed as αA ₂ ∠(-θ _det /2), and the second orthogonal signal is expressed as αA ₂ sin(ω ₀ t -θ _det /2+90°), its phase is expressed as αA ₂ ∠(-θ _det /2+90°),

The phase difference (quadrature error) between the first orthogonal signal and the second in-phase signal can be expressed as A ₁ /A ₂ ∠(θ _det +90°). The phase difference (quadrature error) between can be expressed as A ₁ /A ₂ ∠(θ _det -90°). θ _det in the above quadrature error is the phase difference between the first and second signals. Therefore, by using the above quadrature modulator, the phase of the quadrature modulation signal can represent the phase difference between the first and second signals, and then the phase difference between the two can be obtained by analyzing the quadrature modulation signal.

Furthermore, in the embodiment of the signal phase difference acquisition device provided according to the present invention, the device may also include an amplifier, which is connected to the quadrature coupler and the quadrature modulator respectively. The amplifier can be used to amplify the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal respectively. In this embodiment, the quadrature modulator may be used to perform quadrature modulation on the amplified first in-phase signal, first quadrature signal, second in-phase signal and second quadrature signal to obtain quadrature Modulated signal. In some embodiments, the number of the above-mentioned amplifiers may be four, and the four amplifiers are respectively used to amplify the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal. In this embodiment, conventional signal amplifier devices in the field of signal processing technology can be used to construct the above amplifier. For example, a VGA (Variable Gain Amplifier) circuit can be used to build an amplifier

By amplifying the first and second in-phase signals and the first and second orthogonal signals, signal interference can be reduced, which is conducive to orthogonal modulation of each signal to obtain an orthogonal modulated signal.

3. Voltage acquirer

The voltage acquirer can also include a DC component acquisition module. The DC component acquisition module can be used to acquire the DC component in the quadrature modulation signal. The voltage acquirer can also be used to acquire the first signal and the second signal respectively according to the DC component. phase compensation control voltage. In some preferred embodiments, the DC component acquisition module may include a low-pass filter, and the low-pass filter may perform low-pass filtering on the quadrature modulation signal to acquire the DC component. The quadrature modulation signal is a composite signal composed of a DC component and an AC component. The phase of the DC component is fixed. This phase can represent the phase difference between the first and second signals, that is, the DC component can be directly converted into phase as the above-mentioned phase difference. In this case, the phase compensation control voltage of the first and second signals can be obtained directly based on the DC component.

In some embodiments, the voltage acquirer may include a voltage acquisition unit, which can acquire the phase compensation control voltage of the first signal and the second signal respectively according to the DC component. It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the voltage acquisition unit, and use conventional implementation methods in the field of signal processing technology such as software methods to configure the function of the voltage acquisition unit, as long as the voltage acquisition The unit can obtain the phase compensation control voltage of the first signal and the second signal respectively according to the DC component. The embodiments of the present invention do not specifically limit the type and model of the device used in the voltage acquisition unit and the method for realizing the function.

It should also be noted that the setting of the voltage acquisition unit is only to illustrate the functional units of the voltage acquisition unit. The physical devices corresponding to these units can be electronic devices or processors themselves, or part of the software or hardware in electronic devices or processors. part, or a combination of software and hardware.

Referring to Figure 5, Figure 5 exemplarily shows the principle of signal phase compensation, in which the first and second signals, the first and second in-phase signals, and the first and second orthogonal signals are all the same as those shown in Figure 4 The relevant signals are the same. As shown in Figure 5, the first modulated signal obtained by multiplying the first in-phase signal and the second quadrature signal is expressed as β ₁ (αA ₂ sin(ω ₀ t-θ _det /2+90°)·αA ₁ sin (ω ₀ t+θ _det /2)), the second modulated signal obtained by multiplying the second in-phase signal and the first quadrature signal is expressed as β ₂ (αA ₂ sin(ω ₀ t-θ _det /2)· αA ₁ sin(ω ₀ t+θ _det /2+90°)), the quadrature modulation signal can be obtained by subtracting the first and second modulation signals (not shown in Figure 5). After that, the low-pass filter circuit in the transimpedance amplifier circuit (Trans Impedance Amplifier, TIA) is used to perform low-pass filtering on the quadrature modulation signal, and the DC component β ₁ β ₂ A ₁ A ₂ sin of the quadrature modulation signal can be obtained (θ _det )/2, the phase of this DC component is θ _det , which is the phase difference between the first and second signals. At this time, the phase compensation control voltages V _CTR1 and V _CTR2 of the first and second signals can be obtained directly based on this DC component.

Referring to Figure 6, after obtaining the phase compensation control voltages V _CTR1 and V _CTR2 , the phase compensation control voltage V _CTR1 is input to the phase shifter PS1 corresponding to the first signal, and the phase compensation control voltage V _CTR2 is input to the second signal. The phase shifter PS2 corresponding to the signal, under the control of the phase shifters PS1 and PS2, the phases of the first and second signals will be compensated to be basically the same.

Referring to FIG. 7 , FIG. 7 further exemplifies the principle of signal phase compensation. It should be noted that since this is a principle description, the first and second signals are analyzed as a whole. Specifically, the phase differences before and after phase compensation of the first and second signals are θ _in and θ _det respectively. According to the foregoing device embodiment, the phase compensation control voltage can be obtained as _VCTR , and _VCTR is input to the phase shifter. The obtained phase to be compensated is θ _COM1 , and PD represents the structure for obtaining the phase compensation control voltage in the embodiment of the present invention. In the principle shown in Figure 7, the output result of PD is the phase compensation control voltage V _CTR . As shown in Figure 7, the phase difference θ _det after phase compensation has approached 0, indicating that the phases of the first and second signals are basically the same.

Among them, G _Loop represents the loop gain, and the calculation formula of G _Loop is as follows:

K represents the gain of the phase shifter, G represents the gain generated when obtaining V _CTR , Express/>

because Therefore, θ _det can be minimized by adjusting G _Loop . However, based on control theory, it can be seen that instead of maximizing G _Loop , θ _det can reach the minimum. Increasing G _Loop without limit is likely to cause V _CTR to oscillate violently or even diverge, making it impossible to return to a stable state. Under the control of this V _CTR , the phase shifter will run out of control, and θ _det cannot reach the minimum. Therefore, before using the signal phase compensation device, G _Loop must be debugged to obtain an optimal G _Loop that can both stabilize V _CTR and minimize θ _det . Since G _Loop = KG, the value of G _Loop can be adjusted by adjusting the size of K and/or G. Furthermore, β ₁ and/or β ₂ can be adjusted when adjusting the size of G. Obtaining the best G _Loop is to obtain The best combination of K, β ₁ and β ₂ . When using the signal phase compensation device, the optimal parameters completed by the above debugging can be directly called.

In some embodiments, the voltage acquisition component further includes a second amplifier connected to the DC component acquisition module. The second amplifier is used to amplify the DC component acquired by the DC component acquisition module. The voltage acquisition in the voltage acquisition component The device is also used to obtain the phase compensation control voltages of the first signal and the second signal respectively based on the amplified DC component. As shown in Figure 6, after obtaining the DC component β ₁ β ₂ A ₁ A ₂ sin(θ _det )/2 of the quadrature modulation signal, the VGA circuit can also be used to amplify the DC component to obtain the amplified DC component. G ₁ β ₁ β ₂ A ₁ A ₂ sin(θ _det )/2, where G ₁ represents the gain of the VGA circuit.

By amplifying the DC component, it is helpful to obtain a more accurate phase compensation control voltage, thereby improving the phase compensation effect of the signal.

Referring to FIG. 8 , FIG. 8 exemplarily shows the principle of signal phase compensation after adding the control link of amplifying the DC component on the basis of FIG. 7 . At this time, the calculation formula of the loop gain is G _Loop =K ₁ G ₁ G ₂ , K ₁ represents the gain of the phase shifter, G ₁ represents the gain when amplifying the output result of the PD, where G ₂ is the same as in Figure 6 G is the same. When obtaining the best loop gain, in addition to adjusting the values of K ₁ and G ₂ , you can also adjust the value of G ₁ . In the principle shown in Figure 8, the output result of the VGA is the phase compensation control voltage V _CTR .

The compensation effect of phase compensation based on the principle shown in Figure 8 will be described below with reference to Figures 9 to 11.

Figure 9 exemplarily shows the waveform of an input signal. The abscissa of Figure 9 is the input phase of the input signal. The unit of the phase is Degree. The ordinate of Figure 9 is the response time. The unit of the response time is Nanoseconds ns.

FIG. 10 exemplarily shows the waveforms of the phase compensation control voltage V _CTR before and after phase compensation of the input signal when the response time is 73.5 ns and the input phase is -180°. As shown in Figure 10, there is no phase compensation before 73.5ns, and V _CTR is basically zero. Phase compensation begins at 73.5ns, and V _CTR increases rapidly and stabilizes at 200.6mV. As V _CTR stabilizes, it indicates that the phase compensation of the input signal also tends to be stable. As can be seen from Figure 10, V _CTR will not fluctuate significantly and can stabilize quickly, which shows that the phase compensation of the input signal will not fluctuate and can stabilize quickly, with a high phase compensation effect.

FIG. 11 exemplarily shows the waveforms of the phase compensation control voltage V _CTR before and after phase compensation of the input signal when the response time is 40.6 ns and the input phase is 60°. Similar to Figure 10, V _CTR also does not fluctuate significantly and can stabilize quickly, which shows that the phase compensation of the input signal does not fluctuate and can stabilize quickly, with a high phase compensation effect.

In some implementations, the DC component acquisition module further includes a first DC unit and a second DC unit. The first DC unit may be used to obtain the DC component corresponding to the first signal based on the preset ratio corresponding to the first signal and according to the DC component, and the second DC unit may be used to obtain the DC component corresponding to the first signal based on the preset ratio corresponding to the second signal. The DC component corresponding to the second signal is obtained according to the DC component, and the sum of the preset proportions corresponding to the first signal and the second signal is 1. In this embodiment, the voltage acquirer is also used to obtain the phase compensation control voltage of the first signal based on the DC component corresponding to the first signal, and to obtain the phase compensation control voltage of the second signal based on the DC component corresponding to the second signal. Voltage.

The first DC unit can multiply the DC component corresponding to the preset ratio of the first signal, and the result of the multiplication is the DC component corresponding to the first signal. The second DC unit can also multiply the preset ratio corresponding to the second signal. Suppose the ratio is multiplied by the DC component to obtain the DC component corresponding to the second signal. In some preferred embodiments, the corresponding preset ratios of the first signal and the second signal are both 1/2, that is, the corresponding DC components of the first and second signals are half of the original DC components. It should be noted that although the embodiments of the present utility model only provide a specific implementation in which the preset ratios are all 1/2, those skilled in the art can understand that, without departing from the technical principles of the present utility model, , you can change the corresponding preset proportions of the first and second signals. For example, the corresponding preset ratios of the first and second signals are 0 and 1 respectively. The technical solution after changing the above preset ratio still falls within the protection scope of the present invention.

It should be noted that those skilled in the art can use conventional electronic devices in the field of electronic device technology to construct the first and second DC units, and use conventional implementation methods in the field of signal processing technology such as software methods to configure the first and second DC units. The function of the unit only needs to enable the first and second DC units to obtain the DC air volume corresponding to the first and second signals respectively according to the DC component. The embodiment of the present invention does not use the first and second DC units. The type and model of the device and the implementation method of its function are specifically limited.

Based on the preset ratio, the corresponding DC components of the first and second signals are obtained, and the phase compensation control voltages of the first and second signals can be flexibly adjusted. Then, under the control of different phase compensation control voltages, the phase shifter Different compensation phases can be output, and under the control of different compensation phases, the phases of the first and second signals after compensation will be different.

As shown in Figure 6, the phase of the first signal is A ₁ ∠(θ _det /2), and the phase of the second signal is A ₂ ∠(-θ _det /2). The DC component obtained according to the quadrature modulation signal is G ₁ β ₁ β ₂ A ₁ A ₂ sin(θ _det )/2.

If the preset ratios of the first and second signals are both 1/2, then the phase compensation control voltages V _CTR1 and V _CTR2 of the first and second signals are both G ₁ β ₁ β ₂ A ₁ A ₂ sin( θ _det )/4. Under the control of V _CTR1 , the phase shifter PS1 can compensate the phase of the first signal from θ _det /2 to θ _det . Under the control of V _CTR2 , the phase shifter PS2 can compensate the phase of the second signal from -θ _det . /2 compensated to θ _det .

If the preset ratios of the first and second signals are 0 and 1 respectively, then V _CTR1 is 0 and V _CTR2 is G ₁ β ₁ β ₂ A ₁ A ₂ sin(θ _det )/2. Under the control of V _CTR1 , the phase shifter PS1 will not change the phase of the first signal, which is still θ _det /2. Under the control of V _CTR2 , the phase shifter PS2 can change the phase of the second signal from -θ _det / 2 compensated to θ _det /2.

Based on the above DC component acquisition module, the phase of the first and second signals after compensation can be flexibly changed, thereby meeting the phase requirements after compensation in different application scenarios, and improving the phase compensation device described in the embodiment of the present invention. scope of application.

Further, in the signal phase compensation device according to the embodiment of the utility model, the device also includes a second phase shifter connected to the voltage acquisition component. The voltage acquisition component is also used to compare the first signal and the second signal after phase compensation. signal, obtain the phase compensation control voltage of the first signal and the second signal respectively, and output the phase compensation control voltage obtained again to the second phase shifter. The second phase shifter is used to perform phase compensation again on the first signal and the second signal after phase compensation according to the phase compensation control voltage obtained again.

When the voltage acquisition component acquires the phase compensation control voltage of the first and second signals, it actually acquires it based on the phase difference between the two. When the voltage acquisition component is used again to obtain the phase compensation control voltage of the "first and second signals after phase compensation", it is actually based on the phase difference between the "first and second signals after phase compensation". That is, the phase difference remaining after one phase compensation is used to obtain the phase compensation control voltage. Under the control of the phase compensation control voltage, the phase shifter can effectively eliminate the above-mentioned remaining phase difference, so that the phase difference between the first and second signals reaches zero. As shown in Figure 12, Figure 12 exemplarily shows the principle of signal phase compensation after adding a secondary compensation link of the second phase shifter _K2 on the basis of Figure 8. After completing the first compensation, the phase difference θ _det between the first and second signals passes through the PD and outputs the phase compensation control voltage to the second phase shifter K ₂ again. After the phase compensation is completed through the second phase shifter K ₂ The phase difference between the first and second signals is θ _out , and θ _out is smaller than θ _det and is already very small, approaching zero.

In some implementations, the signal phase compensation device further includes a third amplifier, which is connected to the voltage acquisition component and the second phase shifter respectively. The third amplifier is used to amplify the phase compensation control voltage obtained again and output the amplified phase compensation control voltage to the second phase shifter. The second phase shifter is also used to respectively adjust the phase compensation control voltage according to the amplified phase compensation control voltage. After phase compensation, the first signal and the second signal are phase compensated again. The gain of the third amplifier is the reciprocal of the preset gain product. The preset gain product is the product of the corresponding gains of the voltage acquisition component and the second phase shifter. . As shown in Figure 12, the PD output phase compensation control voltage is first amplified by the third amplifier G ₃ and then output to the second phase shifter K ₂ . The gain of the third amplifier G ₃ can be expressed as 1/K ₂ G ₁ G ₂ , K ₂ represents the gain of the second phase shifter.

The following describes embodiments of the phased array provided by the present invention.

In an embodiment of a phased array according to an embodiment of the present invention, the phased array may include a control device, a phase shifter, and a signal superpositioner. The control device is the phased array control device described in the previous device embodiment. The control device can be used to control each phase shifter to perform phase compensation on the signals received by each antenna in the array antenna. The signal adder may be configured to add and output signals received by each antenna after phase compensation.

Referring to Figure 13, Figure 13 exemplarily shows the main structure of the phased array. As shown in Figure 13, the phased array includes N phase shifters (N≥4), that is, PS ₁ to PS _N , PS ₁ to PS _N respectively respond to the signals x ₁ (t) to x _N received by the N antennas (t) Perform phase compensation. After phase compensation, the phase of each signal to/> Similarly, each signal after phase compensation will be input to the signal adder to obtain the superimposed signal y(t).

Based on the above phased array, the phase compensation of each signal can be accurately completed and the signal quality of the received signal can be improved.

So far, the technical solution of the present utility model has been described with reference to an embodiment shown in the drawings. However, those skilled in the art can easily understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or replacements to relevant technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

Claims (12)

1. A signal phase compensation device, characterized in that the device includes a voltage acquisition component and a first phase shifter, and the voltage acquisition component includes an orthogonal coupler, an orthogonal modulator and a voltage acquirer connected in sequence; The quadrature coupler is used to obtain a first in-phase signal and a first orthogonal signal that are respectively the same and orthogonal to the phase of the first signal, and to obtain a second signal that is the same and orthogonal to the second signal. In-phase signal and second quadrature signal; The quadrature modulator is used to perform quadrature modulation on the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal to obtain the quadrature modulated signal; The voltage acquirer is used to acquire the phase compensation control voltage of the first signal and the second signal respectively according to the quadrature modulation signal; The first phase shifter is used to perform phase compensation on the first signal and the second signal respectively according to the phase compensation control voltages of the first signal and the second signal. 2. The device according to claim 1, wherein the orthogonal coupler includes: The first orthogonal coupling module is used to obtain the first in-phase signal and the first orthogonal signal that are the same and orthogonal to the phase of the first signal respectively; The second orthogonal coupling module is used to obtain a second in-phase signal and a second orthogonal signal that are the same phase and orthogonal to the second signal. 3. The device of claim 1, wherein the quadrature modulator includes: A first multiplier configured to multiply the first in-phase signal and the second quadrature signal to obtain the first modulated signal; a second multiplier configured to multiply the second in-phase signal and the first quadrature signal to obtain the second modulated signal; A subtractor used to subtract the first modulation signal and the second modulation signal to obtain a quadrature modulation signal. 4. The device according to claim 1, wherein the voltage acquisition component further includes a first amplifier, which is connected to the quadrature coupler and the quadrature modulator respectively; The first amplifier is used to amplify the first in-phase signal, the first quadrature signal, the second in-phase signal and the second quadrature signal respectively; The quadrature modulator is also used to perform quadrature modulation on the amplified first in-phase signal, first quadrature signal, second in-phase signal and second quadrature signal to obtain a quadrature modulated signal. 5. The device according to claim 4, characterized in that the number of the first amplifiers is four and each first amplifier is used to process the first in-phase signal, the first quadrature signal, the second in-phase signal respectively. The signal is amplified with the second orthogonal signal. 6. The device according to claim 1, wherein the voltage acquirer includes: A DC component acquisition module, which is used to acquire the DC component in the quadrature modulation signal; The voltage acquirer is also used to acquire phase compensation control voltages of the first signal and the second signal respectively according to the DC component. 7. The device according to claim 6, characterized in that the DC component acquisition module includes a low-pass filter, the low-pass filter is used to perform low-pass filtering on the orthogonal modulation signal to obtain the DC component. 8. The device according to claim 6, wherein the DC component acquisition module further includes a first DC unit and a second DC unit; The first DC unit is used to obtain the DC component corresponding to the first signal based on the preset ratio corresponding to the first signal and according to the DC component; The second DC unit is used to obtain the DC component corresponding to the second signal based on the preset ratio corresponding to the second signal and according to the DC component; The voltage acquirer is also used to obtain the phase compensation control voltage of the first signal according to the DC component corresponding to the first signal, and obtain the phase compensation control voltage of the second signal according to the DC component corresponding to the second signal; Among them, the sum of the corresponding preset ratios of the first signal and the second signal is 1. 9. The device according to claim 6, wherein the voltage acquisition component further includes a second amplifier connected to the DC component acquisition module; The second amplifier is used to amplify the DC component acquired by the DC component acquisition module; The voltage acquirer is also used to acquire the phase compensation control voltages of the first signal and the second signal respectively according to the amplified DC component. 10. The device according to any one of claims 1 to 9, characterized in that the device further includes a second phase shifter connected to the voltage acquisition component; The voltage acquisition component is also used to obtain the phase compensation control voltage of the first signal and the second signal respectively according to the first signal and the second signal after phase compensation, and obtain the phase compensation control voltage again. Output to the second phase shifter; The second phase shifter is used to perform phase compensation again on the first signal and the second signal after phase compensation according to the phase compensation control voltage obtained again. 11. The device according to claim 10, wherein the device further includes a third amplifier, which is connected to the voltage acquisition component and the second phase shifter respectively; The third amplifier is used to amplify the re-obtained phase compensation control voltage and output the amplified phase compensation control voltage to the second phase shifter; The second phase shifter is also used to perform phase compensation again on the first signal and the second signal after phase compensation according to the amplified phase compensation control voltage; Wherein, the gain of the third amplifier is the reciprocal of a preset gain product, and the preset gain product is the product of the corresponding gains of the voltage acquisition component and the second phase shifter. 12. A phased array, characterized in that the phased array includes: multiple phasers; A control device configured to separately control each phase shifter to perform phase compensation on signals received by each antenna in the array antenna, the control device comprising the signal phase compensation device according to any one of claims 1 to 11; A signal adder is used to add and output the signals received by each antenna after phase compensation.