CN215066938U - Low-power-consumption broadband frequency measurement system - Google Patents
Low-power-consumption broadband frequency measurement system Download PDFInfo
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- CN215066938U CN215066938U CN202120944474.7U CN202120944474U CN215066938U CN 215066938 U CN215066938 U CN 215066938U CN 202120944474 U CN202120944474 U CN 202120944474U CN 215066938 U CN215066938 U CN 215066938U
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Abstract
The utility model provides a low-power consumption broadband frequency measurement system, which comprises a radio frequency input interface, a radio frequency output interface and a signal conditioning module, the system comprises a multi-channel interference phase comparison module and a control and interface board module, wherein the output end of a signal conditioning module is respectively connected with the input end of the multi-channel interference phase comparison module and the input end of the control and interface board module, the input end of a first harmonic suppression power divider in the signal conditioning module is connected with a radio frequency input interface, one output end of the first harmonic suppression power divider in the signal conditioning module is connected with a radio frequency output interface, the output end of the multi-channel interference phase comparison module is connected with the control and interface board module, the signal conditioning module is used for converting instantaneous frequency information of a detected and input ultra-wideband signal into a frequency control signal in real time, the multi-channel interference phase comparison module delays the radio frequency signal and then phase discriminates a test frequency, and the control and interface board module is used for outputting the frequency of the tested radio frequency signal; the utility model has the characteristics of it is miniaturized, the consumption is little.
Description
Technical Field
The utility model relates to a microwave communication technical field particularly, relates to a broadband frequency measurement system of low-power consumption.
Background
The development of high-speed digital circuits leads to higher and higher sampling rate, stronger and stronger computing capability and wider application of digital frequency measurement. Instantaneous frequency measurement (detection pulse) is a rapid measurement of signal carrier frequency, and has important application in the field of electronic countermeasure.
The current universal frequency measurement technology is mainly divided into digital frequency measurement and analog frequency measurement, wherein the digital frequency measurement is to convert frequency information into digital information through sampling and then perform related calculation, and common methods comprise a counting method, a Fourier transform method, an instantaneous correlation method and the like; the analog frequency measurement method is to convert frequency information into amplitude information by using a high-frequency device with a certain combination, and then solve the signal frequency through a related circuit, the common methods comprise a multi-channel method, a frequency discrimination method, an interference phase comparison method and the like, the digital frequency measurement method and the interference phase comparison method are mostly applied at present, the interference phase comparison method discriminates phase after delaying a signal, the frequency information is calculated by using the linear relation between the phase difference and the frequency, and the measurement of the frequency is realized through different delay combinations.
However, the existing broadband frequency measurement system adopting the interference phase comparison method has larger volume and power consumption.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a broadband frequency measurement system of low-power consumption, it adopts to interfere than the phase method and carries out the frequency measurement to have the miniaturized characteristics of low-power consumption.
The embodiment of the utility model discloses a realize through following technical scheme:
a low-power-consumption broadband frequency measurement system comprises a signal conditioning module, a multi-channel interference phase comparison module and a control and interface board module, wherein the output end of the signal conditioning module is respectively connected with the input end of the multi-channel interference phase comparison module and the input end of the control and interface board module, and the output end of the multi-channel interference phase comparison module is connected with the control and interface board module.
Preferably, the low-power-consumption broadband frequency measurement system further comprises a radio frequency input interface and a radio frequency output interface, and the signal conditioning module is connected with the radio frequency output interface and the radio frequency input interface respectively.
Preferably, the signal conditioning module includes a frequency measurement signal output structure and a pulse signal output structure, the frequency measurement signal output structure includes a first harmonic suppression power divider, a first coupler, a first band-pass filter, a first amplifier, a numerical control attenuator, a second amplifier, a first detector, a sampling and protection circuit, and a third amplifier, which are connected in sequence, an input end of the first harmonic suppression power divider is connected to the radio frequency input interface, a first output end of the first harmonic suppression power divider is connected to the first coupler, a second output end of the first harmonic suppression power divider is connected to the radio frequency output interface, one end of the first coupler sub-channel is connected to a load, a coupling signal end of the first coupler sub-channel is connected to an input end of the first detector, an output end of the third amplifier is connected to an input end of the numerical control attenuator, the output end of the second amplifier is connected with the multichannel interference phase comparison module, and the input end of the pulse signal output structure is connected with the output end of the first detector.
Preferably, the pulse signal output structure is connected to the output end of the first detector, and includes a fourth amplifier, a fifth amplifier, and a sixth amplifier, and the output ends of the fourth amplifier, the fifth amplifier, and the sixth amplifier are connected to the control and interface board module, respectively.
Preferably, the multichannel interference phase comparison module includes a second harmonic suppression power divider, a plurality of third harmonic suppression power dividers, and a plurality of frequency measurement circuit structures, an input end of the second harmonic suppression power divider is connected to an output end of the second amplifier, a plurality of output ends of the second harmonic suppression power divider are connected to input ends of the plurality of third harmonic suppression power dividers in a one-to-one correspondence, and a plurality of output ends of the third harmonic suppression power dividers are connected to input ends of the plurality of frequency measurement circuit structures.
Preferably, the frequency measurement circuit structure includes a second band-pass filter, a second coupler, a fourth harmonic suppression power divider, a fifth harmonic suppression power divider, a first 90 ° electrical bridge, a delay line, a second 90 ° electrical bridge, a third 90 ° electrical bridge, a first phase detector, and a second phase detector, where the second band-pass filter, the second coupler, and the fourth harmonic suppression power divider are sequentially connected, an output end of the fourth harmonic suppression power divider is connected to an input end of the fifth harmonic suppression power divider, output ends of the fifth harmonic suppression power divider are respectively connected to the first 90 ° electrical bridge and the second 90 ° electrical bridge, another output end of the fourth harmonic suppression power divider is connected to an input end of the delay line, an input end of the delay line is connected to the second 90 ° electrical bridge, and output ends of the second 90 ° electrical bridge are respectively connected to an input end of the first 90 ° electrical bridge and an input end of the third 90 ° electrical bridge, the input end of the first 90-degree electric bridge is connected with a first phase detector, and the output end of the third 90-degree electric bridge is connected with the second phase detector.
Preferably, one end of the secondary channel of the second coupler is grounded, a coupling signal end of the second coupler is connected with a second detector, and an output end of the second detector is connected with the control and interface board module.
Preferably, the control and interface board module includes an FPGA chip, and a VPX interface board, a power supply unit, a first analog-to-digital converter, a plurality of second analog-to-digital converters, and a plurality of third analog-to-digital converters respectively connected to the FPGA chip, an input end of the first analog-to-digital converter is connected to an output end of a fourth amplifier, input ends of the plurality of second analog-to-digital converters are connected to output ends of the plurality of first phase detectors in a one-to-one correspondence manner, input ends of the plurality of third analog-to-digital converters are connected to output ends of the plurality of second phase detectors in a one-to-one correspondence manner, the power supply unit is respectively connected with the VPX interface board, the signal conditioning module and the multi-channel interference ratio module, the VPX interface board comprises a debugging output interface, a power supply interface and a reserved interface, the debugging output interface is connected with the FPGA chip, and the power supply interface is connected with the power supply unit.
Preferably, the FPGA chip is further connected to a crystal oscillator, an RPOM memory, and a temperature detection unit, respectively.
Preferably, the FPGA chip is further connected to the output terminal of the second detector, the output terminal of the fifth amplifier, and the output terminal of the sixth amplifier.
The utility model discloses technical scheme has following advantage and beneficial effect at least:
the utility model designs a plurality of interference phase comparison frequency measurement channels to measure frequency, adopts the interference phase comparison frequency measurement, and has the advantages of high measurement precision and low energy consumption;
the utility model relates to a rationally, simple structure, the practicality is strong.
Drawings
Fig. 1 is a schematic structural diagram of a low-power-consumption broadband frequency measurement system provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a signal conditioning module provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a multi-channel interference phase comparison module according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a frequency measurement circuit structure provided in embodiment 1 of the present invention;
icon: 1-a first harmonic suppression power divider, 2-a first coupler, 3-a first band pass filter, 4-a first amplifier, 5-a numerical control attenuator, 6-a second amplifier, 7-a first detector, 8-a sampling and protection circuit, 9-a third amplifier, 10-a fourth amplifier, 11-a fifth amplifier, 12-a sixth amplifier, 13-a second harmonic suppression power divider, 14-a third harmonic suppression power divider, 15-a second band pass filter, 16-a second coupler, 17-a fourth harmonic suppression power divider, 18-a fifth harmonic suppression power divider, 19-a first 90-degree electric bridge, 20-a delay line, 21-a second 90-degree electric bridge, 22-a third 90-degree electric bridge, 23-a first phase discriminator and 24-a second phase discriminator, 25-second detector, 26-first analog-to-digital converter, 27-second analog-to-digital converter, 28-third analog-to-digital converter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Example 1
As shown in fig. 1 to 4, a low-power-consumption broadband frequency measurement system includes a signal conditioning module, a multi-channel interference phase comparison module, and a control and interface board module, wherein an output end of the signal conditioning module is respectively connected to an input end of the multi-channel interference phase comparison module and an input end of the control and interface board module, and an output end of the multi-channel interference phase comparison module is connected to the control and interface board module. The signal conditioning module is used for converting instantaneous frequency information of the detected and input ultra-wideband signal into a frequency control signal in real time, the multichannel interference phase comparison module delays the radio-frequency signal and then phase discriminates the testing frequency, and the control and interface board module is used for outputting the frequency of the tested radio-frequency signal in a frequency measuring code mode.
The low-power-consumption broadband frequency measurement system further comprises a radio frequency input interface and a radio frequency output interface, and the signal conditioning module is respectively connected with the radio frequency output interface and the radio frequency input interface.
The signal conditioning module comprises a frequency measurement signal output structure and a pulse signal output structure, the frequency measurement signal output structure comprises a first harmonic suppression power divider 1, a first coupler 2, a first band-pass filter 3, a first amplifier 4, a numerical control attenuator 5, a second amplifier 6, a first detector 7, a sampling and protection circuit 8 and a third amplifier 9 which are connected in sequence, the input end of the first harmonic suppression power divider 1 is connected with the radio frequency input interface, the first output end of the first harmonic suppression power divider 1 is connected with the first coupler 2, the second output end of the first harmonic suppression power divider 1 is connected with the radio frequency output interface, one end of a sub-channel of the first coupler 2 is connected with a load, the coupling signal end of the sub-channel of the first coupler 2 is connected with the input end of the first detector 7, the output end of the third amplifier 9 is connected with the input end of the numerical control attenuator 5, the output end of the second amplifier 6 is connected with the multi-channel interference phase comparison module, and the input end of the pulse signal output structure is connected with the output end of the first detector 7.
Radio frequency signals are input from a radio frequency input interface, frequency distribution is carried out on the radio frequency signals into two paths through the first harmonic suppression power divider 1, one path of radio frequency signals enter subsequent signal processing through the input end of the first coupler 2, and the other path of radio frequency signals are output to a radio frequency output interface through the output end of the first harmonic suppression power divider 1 to be transmitted. The sampling and holding circuit 8 is used for sampling and holding, and the radio frequency signal output by the second amplifier 6 is input to the multi-channel interference phase comparison module.
The pulse signal output structure is respectively connected with the output end of the first detector 7 and comprises a fourth amplifier 10, a fifth amplifier 11 and a sixth amplifier 12, and the output ends of the fourth amplifier 10, the fifth amplifier 11 and the sixth amplifier 12 are respectively connected with a control and interface board module. The rf signal output by the fourth amplifier 10 is used to control and interface board to extract rising edge, the rf signal output by the fifth amplifier 11 is used to control and interface board module to perform pulse power measurement, and the rf signal output by the fifth amplifier 11 is used to control and interface board module to perform pulse width measurement
The multichannel interference phase comparison module includes a second harmonic suppression power divider 13, a plurality of third harmonic suppression power dividers 14, and a plurality of frequency measurement circuit structures, an input end of the second harmonic suppression power divider 13 is connected to an output end of the second amplifier 6, a plurality of output ends of the second harmonic suppression power divider 13 are connected to input ends of the plurality of third harmonic suppression power dividers 14 in a one-to-one correspondence manner, and a plurality of output ends of the third harmonic suppression power dividers 14 are connected to input ends of the plurality of frequency measurement circuit structures.
The frequency measurement circuit structure includes a second band-pass filter 15, a second coupler 16, a fourth harmonic suppression power divider 17, a fifth harmonic suppression power divider 18, a first 90 ° electrical bridge 19, a delay line 20, a second 90 ° electrical bridge 21, a third 90 ° electrical bridge 22, a first phase detector 23, and a second phase detector 24, where the second band-pass filter 15, the second coupler 16, and the fourth harmonic suppression power divider 17 are sequentially connected, an output end of the fourth harmonic suppression power divider 17 is connected to an input end of the fifth harmonic suppression power divider 18, output ends of the fifth harmonic suppression power divider 18 are respectively connected to the first 90 ° electrical bridge 19 and the second 90 ° electrical bridge 21, another output end of the fourth harmonic suppression power divider 17 is connected to an input end of the delay line 20, an input end of the delay line 20 is connected to the second 90 ° electrical bridge 21, and output ends of the second 90 ° electrical bridge 21 are respectively connected to an input end of the first 90 ° electrical bridge 19 and an input end of the second 90 ° electrical bridge 19 The input end of a third 90 ° bridge 22, the input end of the first 90 ° bridge 19 is connected to a first phase detector 23, and the output end of the third 90 ° bridge 22 is connected to a second phase detector 24.
One end of the secondary channel of the second coupler 16 is grounded, a coupling signal end of the second coupler 16 is connected with a second detector 25, and an output end of the second detector 25 is connected with the control and interface board module.
In this embodiment, the second harmonic suppression power divider 13, the third harmonic suppression power divider 14, the fourth harmonic suppression power divider 17, and the fifth harmonic suppression power divider 18 are all two-way power dividers, and the number of the third harmonic suppression power dividers 14 is 2, so the number of the fourth harmonic suppression power divider 17 and the fifth harmonic suppression power divider 18 is 4, the delay line 20 is a microstrip line structure, the number of the first phase detectors 23 is 4, and the number of the second phase detectors 24 is 4;
for a single frequency measurement circuit structure, one path of radio frequency signal subjected to frequency division processing by the third harmonic suppression power divider 14 is firstly subjected to filtering processing by the second band-pass filter 15, then is input into the fourth harmonic suppression power divider 17 by the second coupler 16, the radio frequency signal coupled by the second coupler 16 is input into the control and interface board module by the detector for rising edge extraction, two paths of radio frequency signals output by the fourth harmonic suppression power divider 17 are sequentially output by the fifth harmonic suppression power divider 18, the first 90-degree electric bridge 19 and the first phase discriminator 23, and one path of radio frequency signals are output by the microstrip line, the second 90-degree electric bridge 21, the third 90-degree electric bridge 22 and the second phase discriminator 24; the microstrip line is used for delaying the input of the radio frequency signals so as to obtain the phase difference of the two paths of radio frequency signals.
The control and interface board module comprises an FPGA chip, and a VPX interface board, a power supply unit, a first analog-to-digital converter 26, a plurality of second analog-to-digital converters and a plurality of third analog-to-digital converters which are respectively connected with the FPGA chip, wherein the input end of the first analog-to-digital converter 26 is connected with the output end of the fourth amplifier 10, the input ends of the plurality of second analog-to-digital converters are correspondingly connected with the output ends of the plurality of first phase detectors 23, the input ends of the plurality of third analog-to-digital converters are correspondingly connected with the output ends of the plurality of second phase detectors 24, the power supply unit is respectively connected with the VPX interface board, the signal conditioning module and the multi-channel interference ratio module, the VPX interface board comprises a debugging output interface, a power supply interface and a reserved interface, the debugging output interface is connected with the FPGA chip, and the power supply interface is connected with the power supply unit to supply power to the power supply unit.
In this embodiment, correspondingly, the number of the second analog-to-digital converters is 4, the number of the third analog-to-digital converters is 4, the first analog-to-digital converter 26, the second analog-to-digital converter, and the third analog-to-digital converter all function to convert the analog signals into digital signals, and the FPGA chip receives the digital signals converted by the second analog-to-digital converter and the third analog-to-digital converter, obtains frequency measurement codes corresponding to the digital signals, and outputs the frequency measurement codes through the debugging output structure.
The FPGA chip is also respectively connected with a 100MHz crystal oscillator, an RPOM memory and a temperature detection unit.
The FPGA chip is further connected to the output of the second detector 25, the output of the fifth amplifier 11, and the output of the sixth amplifier 12. .
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A broadband frequency measurement system with low power consumption is characterized by comprising a signal conditioning module, a multichannel interference phase comparison module and a control and interface board module, wherein the output end of the signal conditioning module is respectively connected with the input end of the multichannel interference phase comparison module and the input end of the control and interface board module, and the output end of the multichannel interference phase comparison module is connected with the control and interface board module.
2. The low-power-consumption broadband frequency measurement system according to claim 1, further comprising a radio frequency input interface and a radio frequency output interface, wherein the signal conditioning module is connected to the radio frequency output interface and the radio frequency input interface respectively.
3. The broadband frequency measurement system with low power consumption according to claim 2, wherein the signal conditioning module comprises a frequency measurement signal output structure and a pulse signal output structure, the frequency measurement signal output structure comprises a first harmonic suppression power divider (1), a first coupler (2), a first band-pass filter (3), a first amplifier (4), a numerical control attenuator (5), a second amplifier (6), a first detector (7), a sampling and protection circuit (8) and a third amplifier (9) which are connected in sequence, an input end of the first harmonic suppression power divider (1) is connected to the radio frequency input interface, a first output end of the first harmonic suppression power divider (1) is connected to the first coupler (2), a second output end of the first harmonic suppression power divider (1) is connected to the radio frequency output interface, one end of the first coupler (2) secondary channel is connected with a load, the coupling signal end of the first coupler (2) secondary channel is connected with the input end of the first detector (7), the output end of the third amplifier (9) is connected with the input end of the numerical control attenuator (5), the output end of the second amplifier (6) is connected with the multi-channel interference phase comparison module, and the input end of the pulse signal output structure is connected with the output end of the first detector (7).
4. A low-power consumption broadband frequency measuring system according to claim 3, wherein the pulse signal output structure comprises a fourth amplifier (10), a fifth amplifier (11) and a sixth amplifier (12) respectively connected with the output end of the first detector (7), and the output ends of the fourth amplifier (10), the fifth amplifier (11) and the sixth amplifier (12) are respectively connected with the control and interface board module.
5. The broadband frequency measurement system with low power consumption according to claim 4, wherein the multichannel interference ratio module includes a second harmonic suppression power divider (13), a plurality of third harmonic suppression power dividers (14), and a plurality of frequency measurement circuit structures, an input end of the second harmonic suppression power divider (13) is connected to an output end of the second amplifier (6), a plurality of output ends of the second harmonic suppression power divider (13) are connected to input ends of the plurality of third harmonic suppression power dividers (14) in a one-to-one correspondence, and a plurality of output ends of the third harmonic suppression power dividers (14) are connected to input ends of the plurality of frequency measurement circuit structures.
6. The broadband frequency measurement system with low power consumption according to claim 5, wherein the frequency measurement circuit structure comprises a second band-pass filter (15), a second coupler (16), a fourth harmonic suppression power divider (17), a fifth harmonic suppression power divider (18), a first 90 ° bridge (19), a delay line (20), a second 90 ° bridge (21), a third 90 ° bridge (22), a first phase discriminator (23), and a second phase discriminator (24), the second band-pass filter (15), the second coupler (16), and the fourth harmonic suppression power divider (17) are connected in sequence, an output end of the fourth harmonic suppression power divider (17) is connected to an input end of the fifth harmonic suppression power divider (18), output ends of the fifth harmonic suppression power divider (18) are respectively connected to the first 90 ° bridge (19) and the second 90 ° bridge (21), the other output end of the fourth harmonic suppression power divider (17) is connected to the input end of the delay line (20), the input end of the delay line (20) is connected to the second 90 ° bridge (21), the output ends of the second 90 ° bridge (21) are respectively connected to the input end of the first 90 ° bridge (19) and the input end of the third 90 ° bridge (22), the input end of the first 90 ° bridge (19) is connected to the first phase detector (23), and the output end of the third 90 ° bridge (22) is connected to the second phase detector (24).
7. The broadband frequency measuring system with low power consumption according to claim 6, wherein one end of the secondary channel of the second coupler (16) is grounded, a second detector (25) is connected to a coupling signal end of the second coupler (16), and an output end of the second detector (25) is connected to the control and interface board module.
8. The broadband frequency measurement system with low power consumption according to claim 7, wherein the control and interface board module comprises an FPGA chip, and a VPX interface board, a power supply unit, a first analog-to-digital converter (26), a plurality of second analog-to-digital converters and a plurality of third analog-to-digital converters which are respectively connected with the FPGA chip, wherein an input end of the first analog-to-digital converter (26) is connected with an output end of a fourth amplifier (10), input ends of the plurality of second analog-to-digital converters are correspondingly connected with output ends of the plurality of first phase detectors (23), input ends of the plurality of third analog-to-digital converters are correspondingly connected with output ends of the plurality of second phase detectors (24), the power supply unit is respectively connected with the VPX interface board, the signal conditioning module and the multi-channel interference ratio module, the VPX interface board comprises a debugging output interface, a signal conditioning module, and a multi-channel interference ratio module, The debugging output interface is connected with the FPGA chip, and the power supply interface is connected with the power supply unit.
9. The low-power-consumption broadband frequency measurement system according to claim 8, wherein the FPGA chip is further connected to a crystal oscillator, an RPOM memory, and a temperature detection unit, respectively.
10. A low power consumption broadband frequency measuring system according to claim 8, wherein said FPGA chip is further connected to the output of said second detector (25), the output of a fifth amplifier (11) and the output of a sixth amplifier (12).
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