CN114401169A - Multi-channel signal coherent circuit and radio frequency signal source - Google Patents
Multi-channel signal coherent circuit and radio frequency signal source Download PDFInfo
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Abstract
The embodiment of the invention discloses a multi-channel signal coherent circuit and a radio frequency signal source. The multi-path signal coherent circuit comprises: the signal generating module receives the phase adjusting signal and outputs a single-path signal under the control of the phase adjusting signal; and the phase difference detection module is electrically connected with the at least two signal generation modules and is used for detecting the phase difference of the two signals and generating the phase adjustment signal. Compared with the prior art, the embodiment of the invention realizes the effects of compatible amplitude adjustment and phase adjustment, good stability, small stray and simple structure.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a multi-channel signal coherent circuit and a radio frequency signal source.
Background
With the rapid development of the quantum communication field, the application requirement of a multi-channel signal coherent radio frequency signal source system is large. In the prior art, there are several ways to achieve multipath signal coherence:
firstly, multi-channel signal coherence is realized through single-channel signal source output power division; the problem that this mode exists is that the power divides to have amplitude unable regulation, unable regulation of phase place for the limitation of using is great. Secondly, the frequency synthesis system adopting the phase-locked loop has the problems that the part below the oscillation frequency is basically realized by a frequency division circuit, and the use of frequency division can cause phase uncertainty. Thirdly, coupling a part of signals at each port output, and then performing down-conversion receiving and intermediate frequency processing to obtain phase information of each channel, but the problems exist in that a receiving and detecting phase system is complex in structure, large in implementation difficulty and high in cost; in the real-time detection process, a large-amplitude local oscillation signal exists in the receiving system, the local oscillation signal is easy to leak reversely to the output of the signal source to form stray, and the processing difficulty is large.
In summary, the existing multi-path signal coherent circuit has the problems of incompatibility of amplitude adjustment and phase adjustment, good stability, small stray and simple structure.
Disclosure of Invention
The embodiment of the invention provides a multi-channel signal coherent circuit and a radio frequency signal source, so as to realize the effects of compatible amplitude regulation and phase regulation, good stability, small stray and simple structure.
In a first aspect, an embodiment of the present invention provides a multi-channel signal coherent circuit, including:
the signal generating module receives the phase adjusting signal and outputs a single-path signal under the control of the phase adjusting signal;
and the phase difference detection module is electrically connected with the at least two signal generation modules and is used for detecting the phase difference of the two signals and generating the phase adjustment signal.
Optionally, the multi-path signal coherent circuit further comprises: the output calibration change-over switches correspond to the signal generation modules one by one;
the output calibration change-over switch comprises a signal connecting end, a first switching end and a second switching end, wherein the signal connecting end is electrically connected with the output end of the signal generating module; the first switching end is electrically connected with the input end of the phase difference detection module; the second switching end is electrically connected with the output end of the multi-path signal coherent circuit.
Optionally, the phase difference detection module includes:
the reference branch is accessed to one path of the single-path signal;
the comparison branch is connected with the other path of the single-path signal;
the detection unit is electrically connected with the reference branch circuit and the comparison branch circuit; the detection unit is used for generating the phase adjusting signal according to the two paths of the one-way signals.
Optionally, the reference branch comprises: the first attenuation unit and the first amplification unit are connected in series and used for adjusting the amplitude range of one path of the single-path signal;
the comparison branch comprises: the second attenuation unit and the second amplification unit are connected in series and used for adjusting the amplitude range of the other path of the single-path signal.
Optionally, the detection unit includes:
the first input end of the first frequency mixing subunit is electrically connected with the reference branch, and the second input end of the first frequency mixing subunit is electrically connected with the comparison branch;
the input end of the first acquisition subunit is electrically connected with the output end of the first frequency mixing subunit;
and the input end of the first processor is electrically connected with the output end of the first acquisition subunit, and the output end of the first processor serves as the output end of the detection unit to output the phase adjusting signal.
Optionally, the reference branch comprises: the second frequency mixing unit and the second acquisition unit; a first input end of the second frequency mixing unit is connected with one path of the single-path signal, and a second input end of the second frequency mixing unit is connected with an oscillator signal; the input end of the second acquisition unit is electrically connected with the output end of the second frequency mixing unit, and the output end of the second acquisition unit is used as the output end of the reference branch;
the comparison branch comprises: a third mixing unit and a third acquisition unit; the first input end of the third frequency mixing unit is connected with the other path of the single-path signal, and the second input end of the third frequency mixing unit is connected with the oscillator signal; the input end of the third acquisition unit is electrically connected with the output end of the third frequency mixing unit, and the output end of the third acquisition unit is used as the output end of the comparison branch;
the detection unit includes: and a first input end of the second processor is electrically connected with the output end of the reference branch, a second input end of the second processor is electrically connected with the output end of the comparison branch, and the output end of the second processor is used as the output end of the detection unit to output the phase adjusting signal.
Optionally, the reference branch comprises: a fourth acquisition unit; the input end of the fourth acquisition unit is connected with one path of the single-path signal, and the output end of the fourth acquisition unit is used as the output end of the reference branch;
the comparison branch comprises: a fifth acquisition unit; the input end of the fifth acquisition unit is connected with the other path of the single-path signal, and the output end of the fifth acquisition unit is used as the output end of the comparison branch;
the detection unit includes: and a first input end of the third processor is electrically connected with the output end of the reference branch, a second input end of the third processor is electrically connected with the output end of the comparison branch, and the output end of the third processor serves as the output end of the detection unit to output the phase adjusting signal.
Optionally, the phase difference detection module further includes:
the channel change-over switch comprises a signal connecting end and at least two switching ends, and the number of the switching ends is matched with that of the signal generating modules; the switching end is electrically connected with the output end of the matched signal generating module; the signal connecting end is electrically connected with the comparison branch circuit and provides the other path of the single-path signal for the comparison branch circuit.
Optionally, the multi-path signal coherent circuit further comprises:
an additional calibration device having at least two signal inputs electrically connected to at least two outputs of the multi-path signal coherence circuit; the control output end of the additional calibration equipment is electrically connected with the additional control end of the multi-path signal coherent circuit; the additional calibration equipment is used for compensating the phase variation of the at least two single-path signals.
Optionally, the number of the phase difference detection modules is at least one;
if the number of the phase difference detection modules is one, all the signal generation modules are electrically connected with the phase difference detection modules; one path of signal output by the signal generation module is used as a reference signal, and one path of signal output by the other signal generation modules is used as a comparison signal;
if the number of the phase difference detection modules is at least two, one of the signal generation modules is electrically connected with all the phase difference detection modules, the single-path signal output by the signal generation module is used as a reference signal, and the single-path signals output by other signal generation modules are used as comparison signals; each phase difference detection module is electrically connected with part of the signal generation modules.
In a second aspect, an embodiment of the present invention further provides a radio frequency signal source, including: a multi-path signal correlation circuit as in any embodiment of the invention.
The embodiment of the invention provides a brand-new multi-path signal coherent circuit, which comprises a phase difference detection module and at least two path signal generation modules, wherein the signal generation modules receive phase adjustment signals and output single path signals under the control of the phase adjustment signals; the phase difference detection module is electrically connected with the at least two signal generation modules and is used for detecting the phase difference of the two signals and generating a phase adjustment signal. In a first aspect, in the embodiments of the present invention, each path of signal is independent from each other, and can output signals with different amplitudes, and each path of signal is independently adjustable under the control of a phase adjustment signal, thereby implementing the functions of amplitude adjustment and phase adjustment. In a second aspect, in the embodiment of the present invention, each path of signal is independently output, and phase difference comparison is performed after each path of signal is taken out, so that it is not necessary to use a frequency dividing circuit to divide the frequency of the signal, thereby avoiding phase uncertainty caused by using the frequency dividing circuit, and facilitating to achieve better stability. In the third aspect, in the embodiment of the present invention, a signal does not need to be coupled at a signal output end, and a detection receiving device does not need to be equipped in each channel, so that the problems of insertion loss, frequency response, spurious, and the like caused by the signal are not introduced. Therefore, the embodiment of the invention realizes the effects of compatible amplitude adjustment and phase adjustment, good stability, small stray and simple structure.
Drawings
Fig. 1 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another multi-channel signal coherent circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a multi-path signal coherent circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a multi-path signal coherent circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a multi-path signal coherent circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a multi-path signal coherent circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a multi-path signal coherent circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The embodiment of the invention provides a multi-path signal coherent circuit. Fig. 1 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 1, the multi-path signal coherent circuit includes: a phase difference detection module 200 and at least two-path signal generation module 100. The signal generating module 100 receives the phase adjustment signal and outputs a single-path signal under the control of the phase adjustment signal. The phase difference detection module 200 is electrically connected to the at least two signal generation modules 100, and is configured to detect a phase difference between two signals therein and generate a phase adjustment signal.
The signal generating module 100 may be formed by a hardware circuit to output a single-channel signal. The signal generating modules 100 are signal sources of a multi-path signal coherent circuit, the number of the signal generating modules 100 is N, and N is more than or equal to 2. The N signal generating modules 100 independently output N signals, and therefore, all the signal generating modules 100 may be collectively referred to as an independent N-channel signal source. Accordingly, signal CH1 — signal CHN, represents independent signal source outputs for multiple channels, and illustratively, signal generation module 100 includes phase-adjusted signal output devices for various frequency ranges, amplitude ranges.
The phase difference detection module 200 detects the phase difference of two signals, that is, one of the signals is used as a calibration signal, and the other signals are compared with the calibration signal in phase to obtain the phase difference and generate the phase adjustment signal accordingly. Illustratively, the first path of signal is set as a calibration signal, the other paths of signals are compared signals, and the other paths of signals are sequentially compared with the first path of signal in phase, so that the phase difference between each path of signal and the first path of signal can be obtained, and the phase adjustment signal of each path of signal can be obtained according to the phase difference, thereby realizing the phase adjustment of each path of signal.
Therefore, in the first aspect, the signals of each path are independent from each other, and can output signals with different amplitudes, and the signals of each path are independently adjustable under the control of the phase adjustment signal, so that the functions of amplitude adjustment and phase adjustment are realized. In a second aspect, in the embodiment of the present invention, each path of signal is independently output, and phase difference comparison is performed after each path of signal is taken out, so that it is not necessary to use a frequency dividing circuit to divide the frequency of the signal, thereby avoiding phase uncertainty caused by using the frequency dividing circuit, and facilitating to achieve better stability. In the third aspect, in the embodiment of the present invention, a signal does not need to be coupled at a signal output end, and a detection receiving device does not need to be equipped in each channel, so that the problems of insertion loss, frequency response, spurious, and the like caused by the signal are not introduced. Therefore, the embodiment of the invention realizes the effects of compatible amplitude adjustment and phase adjustment, good stability, small stray and simple structure.
With continued reference to fig. 1, the multi-path signal coherent circuit further includes at least two output terminals 400, the number of the output terminals 400 is equal to the number of the signal generating modules 100, for outputting the multi-path signals.
Fig. 2 is a schematic structural diagram of another multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 2, on the basis of the foregoing embodiments, optionally, the multi-path signal coherent circuit further includes: at least two output calibration switches 300, wherein the output calibration switches 300 correspond to the signal generating modules 100 one to one. The output calibration switch 300 includes a signal connection end, a first switch end and a second switch end, and the signal connection end is electrically connected to the output end of the signal generating module 100; the first switching end is electrically connected with the input end of the phase difference detection module 200; the second switching end is electrically connected with the output end of the multi-path signal coherent circuit. The signal connection end of the calibration change-over switch can be connected with the first switching end and also can be connected with the second switching end. If the control signal connection end is connected with the first switching end, the path of signal can be output to the phase difference detection module 200; if the control signal connecting end is connected with the second switching end, the path of signal can be output through the output end. Illustratively, the signal connection end of the calibration switch corresponding to the first path of signal is controlled to be connected to the first switch end, and the signal connection end of the calibration switch corresponding to the second path of signal is controlled to be connected to the first switch end, so that the phase difference comparison between the first path of signal and the second path of signal can be realized, the first path of signal is used as the calibration signal, the second path of signal is used as the compared signal, the phase difference detection module 200 processes the phase difference to generate the phase adjustment signal of the second path of signal, and the phase adjustment and the phase compensation are performed on the second path of signal generation module 100. Therefore, the embodiment of the present invention is advantageous to implement adjustment and compensation of the signal phase by setting the output calibration switch 300, and the output calibration switch 300 is simple in setting manner, easy to implement, and low in cost.
Fig. 3 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 3, on the basis of the foregoing embodiments, optionally, the phase difference detection module 200 includes: a reference branch 210, a comparison branch 220 and a detection unit 230. The reference branch 210 accesses a single-path signal, for example, the reference branch 210 accesses a first-path signal, and the reference branch 210 processes the first-path signal for subsequent phase comparison. The comparing branch 220 is connected to another single-path signal, for example, the comparing branch 220 is connected to a second-path signal, and the comparing branch 220 processes the second-path signal for subsequent phase comparison. The detection unit 230 is electrically connected to the reference branch 210 and the comparison branch 220; the detecting unit 230 is configured to generate a phase adjusting signal according to the two-path single-path signal. Illustratively, the detecting unit 230 receives the processed first channel signal CH1 and the second channel signal CH2, compares the two channels of signals to obtain a phase difference, and generates a phase adjusting signal according to the phase difference.
In the above embodiments, the reference branch 210, the comparison branch 220 and the detection unit 230 are disposed in various ways, and some of them will be described below, but the present invention is not limited thereto. In practical application, different setting modes can be adopted according to needs.
Fig. 4 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 4, in one embodiment of the present invention, the reference branch 210 optionally includes: the first attenuation unit 211 and the first amplification unit 212 are connected in series, and the first attenuation unit 211 and the first amplification unit 212 are used for adjusting the amplitude range of one-way signals to realize amplitude processing of the calibration signal. The comparison branch 220 includes: and the second attenuation unit 221 and the second amplification unit 222 are connected in series, and the second attenuation unit 221 and the second amplification unit 222 are used for adjusting the amplitude range of the other single-path signal so as to realize amplitude processing on the compared signal. Wherein, since the signal generating module 100 can generate signals with different amplitudes, the amplitudes of the calibration signal and the compared signal may be different. In the embodiment of the present invention, the reference branch 210 includes a first attenuation unit 211 and a first amplification unit 212, and the comparison branch 220 includes a second attenuation unit 221 and a second amplification unit 222, so that signal adjustments with different amplitudes are realized. Exemplarily, the first attenuation unit 211 and the second attenuation unit 221 may be, for example, a numerical control attenuation unit, an analog PIN attenuation unit, or the like.
With continued reference to fig. 4, in one embodiment of the present invention, the detection unit 230 optionally includes: a first mixing subunit 231, a first acquisition subunit 232, and a first processor 233. The first input terminal of the first mixing subunit 231 is electrically connected to the reference branch 210, and the second input terminal is electrically connected to the comparison branch 220. The input terminal of the first collecting subunit 232 is electrically connected to the output terminal of the first mixing subunit 231. The input end of the first processor 233 is electrically connected to the output end of the first collecting subunit 232, and the output end of the first processor 233 serves as the output end of the detecting unit 230 to output the phase adjusting signal.
The first mixing subunit 231 is configured to implement phase comparison between the calibration signal and the compared signal. Illustratively, the calibration signal of the first mixing subunit 231 with the same frequency and the compared signal are analog multiplied, and the direct current output at the intermediate frequency represents the phase difference.
The first acquisition subunit 232 is used for acquiring and recording signals from analog to digital. Illustratively, the first acquisition subunit 232 is an ADC acquisition module. Optionally, the first acquisition subunit 232 is a high-precision ADC acquisition module to realize high-precision data acquisition. Optionally, the first collecting subunit 232 further integrates a filtering function, so that data filtering can be realized, and the precision of data collection is further improved.
The first processor 233 receives the digital signal sent by the first acquisition subunit 232, and generates a phase adjustment signal after digital processing.
It can be seen that the technical solution shown in fig. 4 may be referred to as a mixing detection scheme, and due to the limitation of the first mixing subunit 231 on the amplitude of the signal, the signal needs to be attenuated by an attenuation unit (including the first attenuation unit 211 and the second attenuation unit 221) or amplified by an amplification unit (including the first amplification unit 212 and the second amplification unit 222) according to the amplitude variation range before mixing by using the first mixing subunit 231. Therefore, the mixing detection scheme has low complexity and is easy to implement. And since the first mixing subunit 231 can mix signals with a wide frequency range, the frequency range that can be handled by the mixing detection scheme is wide. In some embodiments, since the first mixing subunit 231 adopts analog multiplication, and the processing accuracy thereof mainly depends on the accuracy of the first acquiring subunit 232, the accuracy of the multi-path signal coherent circuit can be improved by improving the accuracy of the first acquiring subunit 232.
Fig. 5 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 5, in one embodiment of the present invention, the reference branch 210 optionally includes: a second mixing unit 213 and a second collecting unit 214; a first input end of the second frequency mixing unit 213 is connected to a single-channel signal, and a second input end of the second frequency mixing unit 213 is connected to an oscillator signal; the input end of the second collecting unit 214 is electrically connected to the output end of the second frequency mixing unit 213, and the output end of the second collecting unit 214 is used as the output end of the reference branch 210. The comparison branch 220 includes: a third mixing unit 223 and a third collecting unit 224; the first input end of the third frequency mixing unit 223 is connected to another single-path signal, and the second input end of the third frequency mixing unit 223 is connected to an oscillator signal; the input end of the third collecting unit 224 is electrically connected to the output end of the third mixing unit 223, and the output end of the third collecting unit 224 is used as the output end of the comparing branch 220. The detection unit 230 includes: a second processor 234, wherein a first input terminal of the second processor 234 is electrically connected to the output terminal of the reference branch 210, a second input terminal of the second processor 234 is electrically connected to the output terminal of the comparison branch 220, and an output terminal of the second processor 234 serves as an output terminal of the detection unit 230 to output the phase adjustment signal.
The phase difference detecting module 200 further includes an oscillator 250, and the oscillator 250 is configured to generate an oscillator signal and provide a mixed calibration signal. It can be seen that, unlike the mixing detection scheme, the reference branch 210 and the comparison branch 220 are both mixed with the oscillator signal, and therefore, the technical scheme shown in fig. 5 can also be referred to as a two-channel receiving scheme. The two-channel receiving scheme is similar to a down-conversion receiving apparatus, and specifically, a calibration signal and an oscillator signal shared by a compared signal are mixed, the calibration signal is converted to a lower frequency by the second mixing unit 213, and then the calibration signal is digitally down-converted to a baseband signal by the digital acquisition of the second acquisition unit 214; meanwhile, the compared signal is converted to a lower frequency by the third mixing unit 223, and then down-converted to a baseband signal by the digital acquisition of the third acquisition unit 224. The two baseband signals are compared by the second processor 234 to obtain the phase difference between the calibration signal and the compared signal. Similar to the mixing detection scheme, since the second and third mixing units 213 and 223 can mix signals having a wide frequency range, the frequency range that can be handled by the two-channel reception scheme is wide. And, because the calibration signal and the compared signal are respectively mixed and digitally acquired, the range of amplitude that can be processed by the two-channel receiving scheme is large.
Fig. 6 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 6, in one embodiment of the present invention, the reference branch 210 optionally includes: a fourth acquisition unit 215; an input end of the fourth acquisition unit 215 is connected to a single-channel signal, and an output end of the fourth acquisition unit 215 is used as an output end of the reference branch 210. The comparison branch 220 includes: a fifth acquisition unit 225; the input end of the fifth acquisition unit 225 is connected to another single-path signal, and the output end of the fifth acquisition unit 225 is used as the output end of the comparison branch 220. The detection unit 230 includes: a third processor 235, a first input terminal of the third processor 235 is electrically connected to the output terminal of the reference branch 210, a second input terminal of the third processor 235 is electrically connected to the output terminal of the comparison branch 220, and an output terminal of the third processor 235 is used as the output terminal of the detection unit 230 to output the phase adjustment signal.
It can be seen that the solution shown in fig. 6 is similar to the two-channel receiving solution, and outputs the calibration signal and the compared signal to the processor (the second processor 234 or the third processor 235), except that the calibration signal and the compared signal do not need to be down-converted, and therefore, the solution shown in fig. 6 can be referred to as a two-channel sampling comparison solution. The two-channel sampling comparison scheme is to directly digitally acquire the calibration signal and the compared signal and digitally compare the phases in the third processor 235. Compared with a two-channel receiving scheme, the two-channel sampling comparison scheme has the advantages of simple structure and low cost, and can be applied to occasions with relatively low requirements.
With continuing reference to fig. 5 and 6, optionally, similar to the mixing detection scheme, the reference branch 210 in the two-channel receiving scheme and the two-channel sampling comparison scheme further includes a first attenuation unit 211 and a first amplification unit 212 to perform amplitude adjustment on the calibration signal; the comparing branch 220 further comprises a second attenuation unit 221 and a second amplification unit 222 to perform amplitude adjustment on the compared signal. The arrangement is favorable for improving the amplitude range and stability of the coherence of the multipath signals.
With reference to fig. 3 to fig. 6, on the basis of the foregoing embodiments, optionally, the phase difference detection module 200 further includes: a channel switch 240, wherein the channel switch 240 includes a signal connection end and at least two switching ends, and the number of the switching ends is matched with the number of the signal generation modules 100; the switching terminal is electrically connected with the output terminal of the matched signal generating module 100; the signal connection terminal is electrically connected to the comparison branch 220, and provides another single-path signal to the comparison branch 220. With this arrangement, the multiple compared signals except the calibration signal can be sequentially phase-compared with the calibration signal through the channel switch 240, so as to facilitate the phase adjustment function by adjusting the phase of each channel, and finally achieve the phase alignment of each channel signal.
Fig. 7 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 7, on the basis of the foregoing embodiments, optionally, the multi-path signal coherent circuit further includes: an additional calibration device 500, at least two signal inputs of the additional calibration device 500 being electrically connected to at least two outputs 400 of the multi-path signal coherence circuit; the control output terminal of the additional calibration device 500 is electrically connected to the additional control terminal 600 of the multi-path signal coherent circuit; the additional calibration device 500 is used to compensate for phase variations of the at least two one-way signals.
Illustratively, assuming that the amplitude of the calibration signal is unchanged, the amplitude of the compared signal is adjusted by using an attenuation unit (which may be separately provided, or may be provided in the additional calibration device 500), and when the amplitude of the compared signal changes, the additional calibration device 500 is used to measure the amount of change of the phase of the compared signal relative to the phase of the calibration signal, so as to form a phase change curve of the compared signal with the change of the amplitude. Thus, when the additional calibration apparatus 500 detects that the amplitude of the compared signal changes, the phase adjustment of the compared signal is inversely compensated according to the phase change amount corresponding to the amplitude change amount of the curve. By the arrangement, the problem of channel phase change caused by amplitude change can be solved, and the method can be applied to the condition that the port phase difference detection amplitude is limited or the condition that the amplitude adjusting part is used after the phase difference detection.
On the basis of the above embodiments, optionally, as shown in fig. 1 to 7, the number of the phase difference detection modules 200 is at least one. If the number of the phase difference detection modules 200 is one, all the signal generation modules 100 are electrically connected to the phase difference detection modules 200, wherein a single-path signal output by one path of the signal generation module 100 is used as a reference signal, and single-path signals output by other signal generation modules 100 are used as comparison signals.
Fig. 8 is a schematic structural diagram of a multi-channel signal coherent circuit according to an embodiment of the present invention. Referring to fig. 8, if the number of the phase difference detection modules 200 is at least two, one of the signal generation modules 100 is electrically connected to all the phase difference detection modules 200, and the output single-path signal thereof is used as a reference signal, and the output single-path signals of the other signal generation modules 100 are used as comparison signals; each phase difference detection module 200 is electrically connected to the partial signal generation module 100. The arrangement is favorable for solving the problems that the number of channels is large, and the phase difference comparison of the multipath signals is low in sequence. Illustratively, the first path signal CH1 is used as a calibration signal for common division multiplexing connection to each phase difference detection module 200. The signals CH2-CH8 are compared with the first signal CH1 in the first phase difference detection module 200, the signals CH9-CH16 are compared with the first signal CH1 in the second phase difference detection module 200, and so on.
It should be noted that the above embodiments exemplarily show several specific arrangement manners of the phase difference detection module 200, and do not limit the present invention. The phase difference detection module 200 provided in the embodiment of the present invention is not limited to the above schemes, and any structure capable of simulating or indirectly reflecting the phase difference of different channels is within the protection scope of the present invention.
The embodiment of the invention also provides a radio frequency signal source, which comprises the multi-channel signal coherent circuit provided by any embodiment of the invention, and the technical principle and the generated effect are similar and are not repeated. Illustratively, the radio frequency signal source can be applied to MIMO system test, a multi-channel cabinet and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A multi-signal coherent circuit, comprising:
the signal generating module receives the phase adjusting signal and outputs a single-path signal under the control of the phase adjusting signal;
and the phase difference detection module is electrically connected with the at least two signal generation modules and is used for detecting the phase difference of the two signals and generating the phase adjustment signal.
2. The multi-signal coherent circuit of claim 1, further comprising: the output calibration change-over switches correspond to the signal generation modules one by one;
the output calibration change-over switch comprises a signal connecting end, a first switching end and a second switching end, wherein the signal connecting end is electrically connected with the output end of the signal generating module; the first switching end is electrically connected with the input end of the phase difference detection module; the second switching end is electrically connected with the output end of the multi-path signal coherent circuit.
3. The multi-signal coherent circuit of claim 1, wherein said phase difference detection module comprises:
the reference branch is accessed to one path of the single-path signal;
the comparison branch is connected with the other path of the single-path signal;
the detection unit is electrically connected with the reference branch circuit and the comparison branch circuit; the detection unit is used for generating the phase adjusting signal according to the two paths of the one-way signals.
4. The multi-signal coherent circuit of claim 3,
the reference branch includes: the first attenuation unit and the first amplification unit are connected in series and used for adjusting the amplitude range of one path of the single-path signal;
the comparison branch comprises: the second attenuation unit and the second amplification unit are connected in series and used for adjusting the amplitude range of the other path of the single-path signal.
5. The multi-signal coherent circuit of claim 3, wherein said detection unit comprises:
the first input end of the first frequency mixing subunit is electrically connected with the reference branch, and the second input end of the first frequency mixing subunit is electrically connected with the comparison branch;
the input end of the first acquisition subunit is electrically connected with the output end of the first frequency mixing subunit;
and the input end of the first processor is electrically connected with the output end of the first acquisition subunit, and the output end of the first processor serves as the output end of the detection unit to output the phase adjusting signal.
6. The multi-signal coherent circuit of claim 3,
the reference branch includes: the second frequency mixing unit and the second acquisition unit; a first input end of the second frequency mixing unit is connected with one path of the single-path signal, and a second input end of the second frequency mixing unit is connected with an oscillator signal; the input end of the second acquisition unit is electrically connected with the output end of the second frequency mixing unit, and the output end of the second acquisition unit is used as the output end of the reference branch;
the comparison branch comprises: a third mixing unit and a third acquisition unit; the first input end of the third frequency mixing unit is connected with the other path of the single-path signal, and the second input end of the third frequency mixing unit is connected with the oscillator signal; the input end of the third acquisition unit is electrically connected with the output end of the third frequency mixing unit, and the output end of the third acquisition unit is used as the output end of the comparison branch;
the detection unit includes: and a first input end of the second processor is electrically connected with the output end of the reference branch, a second input end of the second processor is electrically connected with the output end of the comparison branch, and the output end of the second processor is used as the output end of the detection unit to output the phase adjusting signal.
7. The multi-signal coherent circuit of claim 3,
the reference branch includes: a fourth acquisition unit; the input end of the fourth acquisition unit is connected with one path of the single-path signal, and the output end of the fourth acquisition unit is used as the output end of the reference branch;
the comparison branch comprises: a fifth acquisition unit; the input end of the fifth acquisition unit is connected with the other path of the single-path signal, and the output end of the fifth acquisition unit is used as the output end of the comparison branch;
the detection unit includes: and a first input end of the third processor is electrically connected with the output end of the reference branch, a second input end of the third processor is electrically connected with the output end of the comparison branch, and the output end of the third processor serves as the output end of the detection unit to output the phase adjusting signal.
8. The multi-signal coherent circuit of any of claims 3-7, wherein said phase difference detection module further comprises:
the channel change-over switch comprises a signal connecting end and at least two switching ends, and the number of the switching ends is matched with that of the signal generating modules; the switching end is electrically connected with the output end of the matched signal generating module; the signal connecting end is electrically connected with the comparison branch circuit and provides the other path of the single-path signal for the comparison branch circuit.
9. The multi-signal coherent circuit of claim 1, further comprising:
an additional calibration device having at least two signal inputs electrically connected to at least two outputs of the multi-path signal coherence circuit; the control output end of the additional calibration equipment is electrically connected with the additional control end of the multi-path signal coherent circuit; the additional calibration equipment is used for compensating the phase variation of the at least two single-path signals.
10. The multi-signal coherent circuit of claim 1, wherein the number of said phase difference detection modules is at least one;
if the number of the phase difference detection modules is one, all the signal generation modules are electrically connected with the phase difference detection modules; one path of signal output by the signal generation module is used as a reference signal, and one path of signal output by the other signal generation modules is used as a comparison signal;
if the number of the phase difference detection modules is at least two, one of the signal generation modules is electrically connected with all the phase difference detection modules, the single-path signal output by the signal generation module is used as a reference signal, and the single-path signals output by other signal generation modules are used as comparison signals; each phase difference detection module is electrically connected with part of the signal generation modules.
11. A radio frequency signal source, comprising: a multi-signal coherent circuit as claimed in any one of claims 1 to 10.
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| CN202111496658.2A CN114401169A (en) | 2021-12-09 | 2021-12-09 | Multi-channel signal coherent circuit and radio frequency signal source |
| PCT/CN2022/096581 WO2023103302A1 (en) | 2021-12-09 | 2022-06-01 | Multi-path signal coherent circuit and radio frequency signal source |
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| WO2023103302A1 (en) * | 2021-12-09 | 2023-06-15 | 普源精电科技股份有限公司 | Multi-path signal coherent circuit and radio frequency signal source |
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| CN114401169A (en) * | 2021-12-09 | 2022-04-26 | 普源精电科技股份有限公司 | Multi-channel signal coherent circuit and radio frequency signal source |
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