CN115037387A - Multi-channel microwave signal source device, system and signal processing method - Google Patents
Multi-channel microwave signal source device, system and signal processing method Download PDFInfo
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- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
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Abstract
The invention provides a multi-channel microwave signal source device, a multi-channel microwave signal source system and a multi-channel microwave signal processing method, wherein the multi-channel microwave signal source device comprises a plurality of single-channel microwave signal sources; the phase locking module is used for performing phase locking on a first clock reference signal of the single-channel microwave signal source to generate a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal; the frequency multiplication module is used for multiplying the frequency of the second clock reference signal to generate a third clock reference signal; and the distribution module is used for performing power distribution on the third clock reference signal, and inputting the output multiple paths of third clock reference signals to the single-channel microwave signal source in a one-to-one correspondence manner, so that the single-channel microwave signal source can generate an electrical test signal according to the third clock reference signal. The invention improves the phase stability of microwave signals among multiple channels and improves the test accuracy; the electric test signals are independently generated among the single-channel microwave signal sources, and the test flexibility is improved.
Description
Technical Field
The invention relates to the technical field of microwave communication testing, in particular to a multi-channel microwave signal source device, a multi-channel microwave signal source system and a multi-channel microwave signal source processing method.
Background
Multiple microwave signal sources are often required for microwave communication test measurements. The traditional scheme is to use a plurality of single-channel microwave signal sources for testing, and the scheme is high in cost, complex in test environment and incapable of ensuring phase stability among a plurality of microwave signal sources.
A10 MHz reference signal is used as a synchronous reference clock among a plurality of traditional single-channel microwave signal sources. Because the frequency of the synchronous reference clock of 10MHz is lower, the phase drift of the microwave signals among the channels is larger along with the time and is not stable enough.
Disclosure of Invention
The invention provides a multi-channel microwave signal source device, a multi-channel microwave signal source system and a signal processing method, which are used for solving the defect of unstable phase of microwave signals among multiple channels in the prior art and realizing the improvement of the phase stability of the microwave signals among the multiple channels.
The invention provides a multi-channel microwave signal source device, comprising:
a plurality of single-channel microwave signal sources;
the input end of the phase-locking module is in signal connection with the output end of the single-channel microwave signal source, and the phase-locking module is used for performing phase locking on a first clock reference signal of the single-channel microwave signal source and outputting a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
the input end of the frequency doubling module is in signal connection with the output end of the phase locking module, and the frequency doubling module is used for doubling the frequency of the second clock reference signal and outputting a third clock reference signal;
the input end of the distribution module is in signal connection with the output end of the frequency doubling module, the output end of the distribution module is in signal connection with the input end of each single-channel microwave signal source, and the distribution module is used for performing power division on the third clock reference signal and inputting the output multiple paths of the third clock reference signals to the single-channel microwave signal sources in a one-to-one correspondence manner so that the single-channel microwave signal sources can generate electrical test signals according to the third clock reference signals.
The multichannel microwave signal source device further comprises a switch module, wherein the input end of the switch module is in signal connection with the output end of the frequency doubling module, and the output end of the switch module is in signal connection with the input end of the distribution module;
the switch module is used for controlling the distribution module to be communicated with the frequency doubling module or with external input; the frequency of the third clock reference signal is the same as the frequency of the external input.
According to the multi-channel microwave signal source device provided by the invention, the single-channel microwave signal source comprises:
the input end of the frequency synthesis module is in signal connection with the output end of the distribution module and is used for generating microwave signals according to the output of the distribution module;
the input end of the amplification filtering module is in signal connection with the output end of the frequency synthesizer module, and the amplification filtering module is used for amplifying and filtering the microwave signal;
and the input end of the attenuation module is in signal connection with the output end of the amplification filtering module, and the attenuation module is used for attenuating the filtered microwave signal and outputting an electric test signal.
The multi-channel microwave signal source device further comprises an FPGA control module, wherein the output end of the FPGA control module is in signal connection with the input ends of the single-channel microwave signal source, the phase-locking module, the frequency doubling module and the distribution module, and the input end of the FPGA control module is in signal connection with the output ends of the single-channel microwave signal source, the phase-locking module, the frequency doubling module and the distribution module and is used for controlling the single-channel microwave signal source, the phase-locking module, the frequency doubling module and the distribution module.
The present invention also provides a multi-channel microwave signal source system, comprising: a plurality of multi-channel microwave signal source devices as described in any one of the above.
According to the multichannel microwave signal source system provided by the invention, the external input of the distribution module in each multichannel microwave signal source device is the output of the distribution modules of other multichannel microwave signal source devices in the plurality of multichannel microwave signal source devices.
According to the multichannel microwave signal source system provided by the invention, the distribution module of one multichannel microwave signal source device in the multichannel microwave signal source devices is communicated with the frequency doubling module, and the distribution modules of other multichannel microwave signal source devices are communicated with the external input;
the external input of the distribution module of each other multichannel microwave signal source device is from a different multichannel microwave signal source device.
The invention also provides a signal processing method, which comprises the following steps:
performing phase locking on a first clock reference signal of a single-channel microwave signal source to generate a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
multiplying the second clock reference signal to generate a third clock reference signal;
performing power division on the third clock reference signal to generate multiple paths of third clock reference signals;
and generating an electrical test signal according to the third clock reference signal of each path by each single-channel microwave signal source.
According to a signal processing method provided by the invention, the generating of the electrical test signal by each single-channel microwave signal source according to each third clock reference signal comprises the following steps:
generating microwave signals according to the third clock reference signals of each path through each single-channel microwave signal source;
amplifying the microwave signal and then filtering;
the filtered microwave signal is attenuated to produce an electrical test signal.
According to the signal processing method provided by the invention, the frequency of the first clock reference signal is 5MHz to 15MHz, the frequency of the second clock reference signal is 50MHz to 150MHz, and the frequency of the third clock reference signal is 0.8GHz to 2.4 GHz.
According to the multi-channel microwave signal source device, the multi-channel microwave signal source system and the multi-channel microwave signal source processing method, the clock reference signal of the single-channel microwave signal source is processed, the signal frequency is improved and then the signal frequency is distributed to each single-channel microwave signal source as the synchronous reference clock, the phase stability of microwave signals among multiple channels is improved, and the testing accuracy is improved; the electric test signals are independently generated among the single-channel microwave signal sources, and the test flexibility is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a multi-channel microwave signal source device provided by the present invention;
FIG. 2 is a second schematic structural diagram of a multi-channel microwave signal source device provided by the present invention;
fig. 3 is a third schematic structural diagram of a multi-channel microwave signal source device provided by the present invention;
FIG. 4 is a fourth schematic structural diagram of a multi-channel microwave signal source device provided by the present invention;
FIG. 5 is a schematic structural diagram of a multi-channel microwave signal source device in a multi-channel microwave signal source system according to the present invention;
FIG. 6 is a schematic diagram of a multi-channel microwave signal source system according to the present invention;
fig. 7 is a schematic flow chart of a signal processing method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
A multichannel microwave signal source device of the present invention is described below with reference to fig. 1, and includes:
a plurality of single-channel microwave signal sources;
the present embodiment forms a multi-channel microwave signal source using a plurality of single-channel microwave signal sources.
The input end of the phase-locking module is in signal connection with the output end of the single-channel microwave signal source, and the phase-locking module is used for performing phase locking on a first clock reference signal of the single-channel microwave signal source and outputting a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
the first clock reference signal is an original clock reference signal of a single-channel microwave signal source and has lower frequency.
And outputting a second clock reference signal with a larger frequency by phase-locking the first clock reference signal.
The input end of the frequency doubling module is in signal connection with the output end of the phase locking module, and the frequency doubling module is used for doubling the frequency of the second clock reference signal and outputting a third clock reference signal;
and carrying out frequency multiplication on the second clock reference signal, namely, the frequency is an integral multiple of the original frequency, and further increasing the signal frequency to obtain a third clock reference signal.
The input end of the distribution module is in signal connection with the output end of the frequency doubling module, the output end of the distribution module is in signal connection with the input end of each single-channel microwave signal source, and the distribution module is used for performing power division on the third clock reference signal and inputting the output multiple paths of the third clock reference signals to the single-channel microwave signal sources in a one-to-one correspondence manner so that the single-channel microwave signal sources can generate electrical test signals according to the third clock reference signals.
And distributing the third clock reference signal serving as a synchronous reference clock to each single-channel microwave signal source to generate an electrical test signal.
The channels are independent from each other, the signal frequency and the power can be independently set, and the method is more flexible and convenient in practical application.
In the embodiment, the clock reference signal of the single-channel microwave signal source is processed, the signal frequency is improved and then the signal frequency is distributed to each single-channel microwave signal source as the synchronous reference clock, so that the phase stability of the microwave signals among multiple channels is improved, and the test accuracy is improved; the electric test signals are independently generated among the single-channel microwave signal sources, and the test flexibility is improved.
On the basis of the foregoing embodiment, as shown in fig. 2, the present embodiment further includes a switch module, an input end of the switch module is in signal connection with an output end of the frequency doubling module, and an output end of the switch module is in signal connection with an input end of the distribution module; the switch module is used for controlling the distribution module to be communicated with the frequency doubling module or with external input; the frequency of the third clock reference signal is the same as the frequency of the external input.
The switch module is used for selecting whether the input of the distribution module is the output of the frequency doubling module or the external input of the multichannel microwave signal source device.
Optionally, the switch module comprises a stationary end and a plurality of moving ends. The fixed end of the switch module is in signal connection with the distribution module; one movable end of the switch module is in signal connection with the frequency doubling module, and the other movable ends of the switch module are in signal connection with external input signals.
When the switch module is switched to the movable end connected with the frequency doubling module, selecting an internal third clock reference signal generated by the frequency doubling module as the input of the distribution module; and when the switch module is switched to the movable end connected with the external input, the external input is used as the input of the distribution module, and the external input power is divided into multiple paths and input into each channel.
In the embodiment, the clock reference signal which is input externally or generated internally is selected as the input of the distribution module through the switch module, so that the channel expansion of the microwave signal source is facilitated, and the phase stability between channels is kept.
On the basis of the foregoing embodiment, as shown in fig. 3, the single-channel microwave signal source in this embodiment includes:
the input end of the frequency synthesis module is in signal connection with the output end of the distribution module and is used for generating microwave signals according to the output of the distribution module;
and the distribution module respectively inputs the power-divided multi-path third clock reference signals or external input into the frequency synthesis module of the corresponding single-channel microwave signal source. The frequency synthesizer module is a frequency synthesizer for generating a microwave signal of a form required by the test, for example, the frequency of the generated microwave signal is 2GHz to 12 GHz.
The input end of the amplifying and filtering module is in signal connection with the output end of the frequency synthesis module, and the amplifying and filtering module is used for amplifying and filtering the microwave signal;
and the input end of the attenuation module is in signal connection with the output end of the amplification filtering module, and the attenuation module is used for attenuating the filtered microwave signal and outputting an electric test signal.
And (3) amplifying and filtering the microwave signal output by the frequency synthesizer module, and then attenuating and outputting the microwave signal. It should be noted that in different channels, the frequencies of signals generated by the frequency synthesis module may be different, the amplification and filtering degrees of the amplification and filtering module may be different, and the attenuation degrees of the attenuation models may also be different, so that separate settings of different channels are realized, and the flexibility of the test is improved.
On the basis of the foregoing embodiments, as shown in fig. 4, the present embodiment further includes an FPGA (Programmable Gate Array) control module, an output end of the FPGA control module is in signal connection with input ends of the single-channel microwave signal source, the phase-locked module, the frequency doubling module, and the distribution module, and an input end of the FPGA control module is in signal connection with output ends of the single-channel microwave signal source, the phase-locked module, the frequency doubling module, and the distribution module, and is configured to control the single-channel microwave signal source, the phase-locked module, the frequency doubling module, and the distribution module.
According to the embodiment, the FPGA control module sends the control instruction to the single-channel microwave signal source, the phase locking module, the frequency doubling module and the distribution module, so that different channels are independently set, and the testing flexibility is improved.
The embodiment provides a multi-channel microwave signal source system, which comprises: a plurality of the multi-channel microwave signal source devices of any of the above embodiments.
A plurality of multi-channel microwave signal source devices can be adopted in the test according to the test requirement. The multi-channel microwave signal source devices can be independently arranged, for example, the number of the single-channel microwave signal sources in the multi-channel microwave signal source device can be the same or different.
On the basis of the above embodiments, in this embodiment, the external input of the distribution module in each multichannel microwave signal source device is the output of the distribution module of another multichannel microwave signal source device in the multiple multichannel microwave signal source devices.
As shown in fig. 5, the distribution module of each multichannel microwave signal source device outputs one more signal. When the input of the distribution module is a third clock reference signal, outputting one path of the third clock reference signal; when the input of the distribution module is external input, one path of external input signal is output.
And one path of multi-output signals are used as the external input of other multi-channel microwave signal source devices, so that the channel expansion of the microwave signal source is facilitated, and the phase stability between channels is kept.
On the basis of the above embodiment, in this embodiment, the distribution module of one of the multiple multichannel microwave signal source devices is communicated with the frequency doubling module, and the distribution modules of the other multichannel microwave signal source devices are communicated with the external input; the external input of the distribution module of each multichannel microwave signal source device comes from different multichannel microwave signal source devices.
The explanation is given by using 3 5-channel microwave signal source devices, each 5-channel microwave signal source device comprises one path of 1.6GHz external reference input and 5 paths of 2-12 GH radio frequency output.
And 3 5-channel microwave signal source devices are used for expanding the phase stabilization channel by selecting 1.6GHz external reference input. Specifically, the first 5-channel microwave signal source device is switched to select an internal third clock reference signal through the switch module, and the other 5-channel microwave signal source devices are switched to select external input through the switch module, wherein the external input is from different devices.
As shown in fig. 6, the external input selected by the switch module of the second 5-channel microwave signal source device is a multi-output 1.6GHz signal of the distribution module of the first 5-channel microwave signal source device; the external input selected by the switch module of the third 5-channel microwave signal source device is a multi-output 1.6GHz signal of the distribution module of the second 5-channel microwave signal source device.
In the embodiment, the switch module selects the internally generated reference signal or the external input, so that the expansion of the number of channels is realized and the phase stability among the channels is kept.
The following describes a signal processing method provided by the present invention, and the signal processing method described below and the multi-channel microwave signal source device described above can be referred to correspondingly.
As shown in fig. 7, the signal processing method provided in this embodiment includes: step 701, performing phase locking on a first clock reference signal of a single-channel microwave signal source to generate a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
the first clock reference signal is an original clock reference signal of a single-channel microwave signal source and has lower frequency.
And outputting a second clock reference signal with a larger frequency by phase-locking the first clock reference signal.
and carrying out frequency multiplication on the second clock reference signal, namely, the frequency is an integral multiple of the original frequency, and further improving the signal frequency to obtain a third clock reference signal.
703, performing power division on the third clock reference signal to generate multiple paths of third clock reference signals;
and distributing the third clock reference signal serving as a synchronous reference clock to each single-channel microwave signal source to generate an electrical test signal.
And 704, generating an electrical test signal according to the third clock reference signal of each path through each single-channel microwave signal source.
The channels are mutually independent, the signal frequency and the power can be independently set, and the device is more flexible and convenient in practical application. The present embodiment forms a multi-channel microwave signal source using a plurality of single-channel microwave signal sources.
In the embodiment, the clock reference signal of the single-channel microwave signal source is processed, the frequency of the signal is improved and then the signal is distributed to each single-channel microwave signal source as the synchronous reference clock, so that the phase stability of the microwave signals among multiple channels is improved, and the test accuracy is improved; the independent generation of the electric test signals among the single-channel microwave signal sources is realized, and the test flexibility is improved.
On the basis of the above embodiments, the generating an electrical test signal according to each third clock reference signal by each single-channel microwave signal source in this embodiment includes: generating microwave signals according to the third clock reference signal of each path by each single-channel microwave signal source;
the frequency synthesizer in each single-channel microwave signal source is used to generate microwave signals in a form required for testing, for example, the frequency of the generated microwave signals is 2GHz to 12 GHz.
Amplifying the microwave signal and then filtering; the filtered microwave signal is attenuated to produce an electrical test signal.
And amplifying and filtering the microwave signal output by the frequency synthesis module, and then attenuating and outputting the microwave signal. It should be noted that in different channels, the frequencies of signals generated by the frequency synthesizer modules may be different, the amplification and filtering degrees of the amplification and filtering modules may be different, and the attenuation degrees of the attenuation models may also be different, so that separate settings of different channels are realized, and the flexibility of the test is improved.
On the basis of the above embodiments, in this embodiment, the frequency of the first clock reference signal is 5MHz to 15MHz, the frequency of the second clock reference signal is 50MHz to 150MHz, and the frequency of the third clock reference signal is 0.8GHz to 2.4 GHz.
Optionally, the frequency of the first clock reference signal is 10MHz, the frequency of the second clock reference signal is 100MHz, and the frequency of the third clock reference signal is 1.6 GHz.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A multi-channel microwave signal source device, comprising:
a plurality of single-channel microwave signal sources;
the input end of the phase-locking module is in signal connection with the output end of the single-channel microwave signal source, and the phase-locking module is used for performing phase locking on a first clock reference signal of the single-channel microwave signal source and outputting a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
the input end of the frequency doubling module is in signal connection with the output end of the phase locking module, and the frequency doubling module is used for doubling the frequency of the second clock reference signal and outputting a third clock reference signal;
the input end of the distribution module is in signal connection with the output end of the frequency doubling module, the output end of the distribution module is in signal connection with the input end of each single-channel microwave signal source, and the distribution module is used for performing power division on the third clock reference signal and inputting the output multiple paths of the third clock reference signals to the single-channel microwave signal sources in a one-to-one correspondence manner so that the single-channel microwave signal sources can generate electrical test signals according to the third clock reference signals.
2. The multichannel microwave signal source device according to claim 1, further comprising a switch module, wherein an input end of the switch module is in signal connection with an output end of the frequency doubling module, and an output end of the switch module is in signal connection with an input end of the distribution module;
the switch module is used for controlling the distribution module to be communicated with the frequency doubling module or with an external input; the frequency of the third clock reference signal is the same as the frequency of the external input.
3. The multi-channel microwave signal source device of claim 1, wherein the single-channel microwave signal source comprises:
the input end of the frequency synthesis module is in signal connection with the output end of the distribution module and is used for generating microwave signals according to the output of the distribution module;
the input end of the amplifying and filtering module is in signal connection with the output end of the frequency synthesis module, and the amplifying and filtering module is used for amplifying and filtering the microwave signal;
and the input end of the attenuation module is in signal connection with the output end of the amplification filtering module, and the attenuation module is used for attenuating the filtered microwave signal and outputting an electric test signal.
4. The multi-channel microwave signal source device according to any one of claims 1 to 3, further comprising an FPGA control module, wherein an output end of the FPGA control module is in signal connection with input ends of the single-channel microwave signal source, the phase-locking module, the frequency-doubling module and the distribution module, and an input end of the FPGA control module is in signal connection with output ends of the single-channel microwave signal source, the phase-locking module, the frequency-doubling module and the distribution module, and is used for controlling the single-channel microwave signal source, the phase-locking module, the frequency-doubling module and the distribution module.
5. A multi-channel microwave signal source system, comprising: a plurality of multi-channel microwave signal source devices according to any of claims 1 to 4.
6. A multichannel microwave signal source system as claimed in claim 5, characterized in that the external input of the distribution module in each multichannel microwave signal source device is the output of the distribution module of the other multichannel microwave signal source devices in the plurality of multichannel microwave signal source devices.
7. A multichannel microwave signal source system according to claim 6, characterized in that the distribution module of one multichannel microwave signal source device of the plurality of multichannel microwave signal source devices is in communication with the frequency doubling module, and the distribution modules of the other multichannel microwave signal source devices are in communication with the external input;
the external input of the distribution module of each other multi-channel microwave signal source device is from a different multi-channel microwave signal source device.
8. A signal processing method, comprising:
performing phase locking on a first clock reference signal of a single-channel microwave signal source to generate a second clock reference signal; the frequency of the second clock reference signal is greater than the frequency of the first clock reference signal;
frequency multiplication is carried out on the second clock reference signal to generate a third clock reference signal;
performing power division on the third clock reference signal to generate multiple paths of third clock reference signals;
and generating an electrical test signal according to the third clock reference signal of each path by each single-channel microwave signal source.
9. The signal processing method of claim 8, wherein generating an electrical test signal from each third clock reference signal by each single-channel microwave signal source comprises:
generating microwave signals according to the third clock reference signals of each path through each single-channel microwave signal source;
amplifying the microwave signal and then filtering;
the filtered microwave signal is attenuated to produce an electrical test signal.
10. The signal processing method of claim 9, wherein the frequency of the first clock reference signal is 5MHz to 15MHz, the frequency of the second clock reference signal is 50MHz to 150MHz, and the frequency of the third clock reference signal is 0.8GHz to 2.4 GHz.
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| CN116449912A (en) * | 2023-06-14 | 2023-07-18 | 中星联华科技（北京）有限公司 | Phase-adjustable multichannel signal source |
| CN116886257A (en) * | 2023-09-06 | 2023-10-13 | 北京中科睿信科技有限公司 | Local oscillation adjusting method, equipment and medium of multichannel coherent signal source |
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| CN116449912A (en) * | 2023-06-14 | 2023-07-18 | 中星联华科技（北京）有限公司 | Phase-adjustable multichannel signal source |
| CN116449912B (en) * | 2023-06-14 | 2023-10-03 | 中星联华科技（北京）有限公司 | Phase-adjustable multichannel signal source |
| CN116886257A (en) * | 2023-09-06 | 2023-10-13 | 北京中科睿信科技有限公司 | Local oscillation adjusting method, equipment and medium of multichannel coherent signal source |
| CN116886257B (en) * | 2023-09-06 | 2023-11-10 | 北京中科睿信科技有限公司 | Local oscillation adjusting method, equipment and medium of multichannel coherent signal source |
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| CN115037387B (en) | 2023-08-01 |
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