CN111130573B - Circuit for improving amplitude-phase consistency of broadband variable-frequency receiving module - Google Patents
Circuit for improving amplitude-phase consistency of broadband variable-frequency receiving module Download PDFInfo
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- CN111130573B CN111130573B CN201911305600.8A CN201911305600A CN111130573B CN 111130573 B CN111130573 B CN 111130573B CN 201911305600 A CN201911305600 A CN 201911305600A CN 111130573 B CN111130573 B CN 111130573B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
Abstract
The invention discloses a circuit for improving amplitude-phase consistency of a broadband frequency conversion receiving module, which comprises a calibration coupling circuit, a radio frequency preselection circuit, a program control circuit, a radio frequency amplification circuit, a first temperature compensation circuit, a first low-pass filter circuit, a first mixing circuit, a first band-pass filter circuit, a first intermediate frequency processing circuit, an amplitude compensation circuit, a second low-pass filter circuit, a second mixing circuit, a second band-pass filter circuit, a second intermediate frequency processing circuit, a first local oscillator processing circuit, a third band-pass filter circuit, a phase compensation circuit, a second local oscillator processing circuit and a fourth band-pass filter circuit. This improve circuit of broadband frequency conversion receiving module amplitude and phase uniformity, because point frequency source LO2 and point frequency source LO3 are fixed frequency's point frequency source for fixed point frequency, carry out phase compensation and can not arouse the worsening of broadband received signal gain flatness, and phase compensation's degree of accuracy is very high, improves the efficiency and the reliability of passageway calibration greatly.
Description
Technical Field
The invention relates to the technical field of phased array radars, in particular to a circuit for improving amplitude-phase consistency of a broadband variable frequency receiving module.
Background
Modern military wars and space detection impose new mission requirements on the radar, and after the second war, with the continuous development of software radio technology and phased array radar technology, the requirement of amplitude-phase consistency between modules is more and more emphasized. The phased array radar has a large number of radio frequency receiving modules, each receiving module has analog devices such as an amplifier, a filter and a mixer, and the inherent amplitude and phase errors of the analog devices make the amplitude and phase consistency errors among the receiving modules of the phased array radar inevitable, so that a series of problems such as the change of the direction of a phased array antenna wave beam, the widening of the wave beam, the increase of a side lobe, the reduction of the antenna gain and the like are caused, and the performance of the phased array radar is reduced or even the phased array radar cannot work.
The conventional method for improving the amplitude and phase consistency among the modules is software calibration, a phase compensation circuit and an amplitude compensation circuit are added on a radio frequency channel at the same time, but the loss of the phase compensation circuit is high, and therefore the performance indexes such as the instantaneous dynamic range of the modules are sacrificed, and meanwhile, in order to compensate the loss, gain compensation is needed in each module, so that the problem of power consumption improvement is caused; based on the problem, a circuit for improving the amplitude-phase consistency of a broadband variable-frequency receiving module is provided.
Disclosure of Invention
The invention aims to provide a circuit for improving amplitude-phase consistency of a broadband variable-frequency receiving module, which has the advantages of not causing deterioration of gain flatness of broadband receiving signals, having high accuracy of phase compensation and greatly improving efficiency and reliability of channel calibration and solves the problems of high loss and difficult avoidance of phase consistency errors in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a circuit for improving amplitude-phase consistency of a broadband frequency conversion receiving module comprises a calibration coupling circuit, a radio frequency preselection circuit, a program control circuit, a radio frequency amplification circuit, a first temperature compensation circuit, a first low-pass filter circuit, a first mixing circuit, a first band-pass filter circuit, a first intermediate frequency processing circuit, an amplitude compensation circuit, a second low-pass filter circuit, a second mixing circuit, a second band-pass filter circuit, a second intermediate frequency processing circuit, a first local oscillator processing circuit, a third band-pass filter circuit, a phase compensation circuit, a second local oscillator processing circuit and a fourth band-pass filter circuit, wherein the input end of the calibration coupling circuit is connected with an RF signal input and a calibration signal input, the output end of the calibration coupling circuit is connected with the input end of the radio frequency preselection circuit, the output end of the radio frequency preselection circuit is connected with the input end of the program control circuit, the output end of the program control circuit is connected with the input end of the radio frequency amplification circuit, the output end of the radio frequency amplifying circuit is connected to the input end of the first temperature compensating circuit, the output end of the first temperature compensating circuit is connected to the input end of the first low-pass filter circuit, and the output end of the first low-pass filter circuit is connected to the input end of the first mixing circuit; the input end of the first local oscillator processing circuit is connected with the input end of a broadband frequency hopping source LO1, the output end of the first local oscillator processing circuit is connected with the input end of a third band-pass filter circuit, and the output end of the third band-pass filter circuit is connected with the input end of the first frequency mixing circuit; the output end of the first frequency mixing circuit is connected to the input end of the first band-pass filter circuit, the output end of the first band-pass filter circuit is connected to the input end of the first intermediate frequency processing circuit, the output end of the first intermediate frequency processing circuit is connected to the input end of the amplitude compensation circuit, the output end of the amplitude compensation circuit is connected to the input end of the second low-pass filter circuit, and the output end of the second low-pass filter circuit is connected to the input end of the second frequency mixing circuit; the input end of the phase compensation circuit is connected to the input end of a point frequency source LO2, the output end of the phase compensation circuit is connected to the input end of a second local oscillator processing circuit, the output end of the second local oscillator processing circuit is connected to the input end of a fourth band-pass filter circuit, and the output end of the fourth band-pass filter circuit is connected to the input end of a second mixing circuit; the output end of the second mixing circuit is connected to the input end of the second band-pass filter circuit, the output end of the second band-pass filter circuit is connected to the input end of the second intermediate frequency processing circuit, and the output end of the second intermediate frequency processing circuit outputs a radio frequency signal IF.
Preferably, the radio frequency preselection circuit comprises a frequency segmentation preselection circuit, a dynamic expansion circuit, a signal amplification circuit, an amplitude equalization circuit and a third low-pass filter circuit.
Preferably, the first intermediate frequency processing circuit and the second intermediate frequency processing circuit have the same model, the first intermediate frequency processing circuit includes a band-pass filter circuit E, a gain control circuit, an amplifying circuit, a second temperature compensation circuit, and a fourth low-pass filter circuit, and the gain control circuit includes a numerical control attenuation circuit, an electric tuning attenuation circuit, and a fixed attenuation circuit.
Preferably, the first local oscillator processing circuit and the second local oscillator processing circuit have the same model, the first local oscillator processing circuit comprises a phase shift control circuit, an amplifying circuit and a filter circuit, and the phase shift control circuit comprises a numerical control phase shift circuit, an electric regulation phase shift circuit and a fixed phase shift circuit.
Compared with the prior art, the invention has the following beneficial effects:
this improve circuit of broadband frequency conversion receiving module amplitude and phase uniformity, need become the fixed intermediate frequency signal that has certain bandwidth with radio frequency received signal through once frequency conversion aftertreatment, to the amplitude compensation of fixed dot frequency signal realize more easily, and because its frequency bandwidth is narrow, compensate it and can not cause the worsening of broadband received signal gain flatness, improve the efficiency and the reliability of channel calibration. The phase calibration unit is located on the first local oscillator processing circuit, because the point frequency source with fixed frequency of the point frequency source LO2 and the point frequency source with fixed frequency of the point frequency source LO3 is fixed point frequency, the deterioration of the gain flatness of the broadband receiving signal can not be caused by performing phase compensation on the point frequency source, the accuracy of the phase compensation is very high, and the efficiency and the reliability of channel calibration are greatly improved.
Drawings
FIG. 1 is a circuit diagram of a secondary mixing broadband frequency conversion receiving module according to the present invention;
FIG. 2 is a circuit diagram of the amplitude phase calibration of the present invention;
fig. 3 is a circuit diagram of the triple-mixing broadband frequency conversion receiving module according to the present invention.
In the figure: 1. calibrating the coupling circuit; 2. a radio frequency preselection circuit; 3. a program control circuit; 4. a radio frequency amplification circuit; 5. a first temperature compensation circuit; 6. a first low-pass filter circuit; 7. a first mixer circuit; 8. a first band pass filter circuit; 9. a first intermediate frequency processing circuit; 10. an amplitude compensation circuit; 11. a second low-pass filter circuit; 12. a second mixer circuit; 13. a second band-pass filter circuit; 14. a second intermediate frequency processing circuit; 15. a first local oscillation processing circuit; 16. a third band-pass filter circuit; 17. a phase compensation circuit; 18. a second local oscillator processing circuit; 19. and a fourth bandpass filter circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1-2, a circuit for improving amplitude-phase consistency of a wideband frequency conversion receiving module includes a calibration coupling circuit 1, a radio frequency preselection circuit 2, a program control circuit 3, a radio frequency amplifying circuit 4, a first temperature compensation circuit 5, a first low-pass filter circuit 6, a first mixer circuit 7, a first band-pass filter circuit 8, a first intermediate frequency processing circuit 9, an amplitude compensation circuit 10, a second low-pass filter circuit 11, a second mixer circuit 12, a second band-pass filter circuit 13, a second intermediate frequency processing circuit 14, a first local oscillator processing circuit 15, a third band-pass filter circuit 16, a phase compensation circuit 17, a second local oscillator processing circuit 18, and a fourth band-pass filter circuit 19, an input end of the calibration coupling circuit 1 is connected to an RF signal input and a calibration signal input, an output end of the calibration coupling circuit 1 is connected to an input end of the preselection circuit 2, the radio frequency preselection circuit 2 comprises a frequency subsection preselection circuit, a dynamic expansion circuit, a signal amplification circuit, an amplitude equalization circuit and a third low-pass filter circuit, the frequency subsection preselection circuit, the dynamic expansion circuit, the signal amplification circuit, the amplitude equalization circuit and the third low-pass filter circuit are connected in series, the output end of the radio frequency preselection circuit 2 is connected to the input end of the program control circuit 3, the output end of the program control circuit 3 is connected to the input end of the radio frequency amplification circuit 4, the output end of the radio frequency amplification circuit 4 is connected to the input end of the first temperature compensation circuit 5, the output end of the first temperature compensation circuit 5 is connected to the input end of the first low-pass filter circuit 6, and the output end of the first low-pass filter circuit 6 is connected to the input end of the first mixing circuit 7; the model of the first local oscillation processing circuit 15 is the same as that of the second local oscillation processing circuit 18, the first local oscillation processing circuit 15 comprises a phase shift control circuit, an amplifying circuit and a filter circuit, the phase shift control circuit comprises a numerical control phase shift circuit, an electric adjusting phase shift circuit and a fixed phase shift circuit, the input end of the first local oscillation processing circuit 15 is connected with the input end of a broadband frequency hopping source LO1, the output end of the first local oscillation processing circuit 15 is connected with the input end of a third band-pass filter circuit 16, and the output end of the third band-pass filter circuit 16 is connected with the input end of the first mixing circuit 7; the output end of the first mixing circuit 7 is connected to the input end of a first band-pass filter circuit 8, the output end of the first band-pass filter circuit 8 is connected to the input end of a first intermediate frequency processing circuit 9, the output end of the first intermediate frequency processing circuit 9 is connected to the input end of an amplitude compensation circuit 10, the output end of the amplitude compensation circuit 10 is connected to the input end of a second low-pass filter circuit 11, and the output end of the second low-pass filter circuit 11 is connected to the input end of a second mixing circuit 12; the input end of the phase compensation circuit 17 is connected to the input end of a point frequency source LO2, the output end of the phase compensation circuit 17 is connected to the input end of a second local oscillator processing circuit 18, the output end of the second local oscillator processing circuit 18 is connected to the input end of a fourth band-pass filter circuit 19, the models of the first intermediate frequency processing circuit 9 and the second intermediate frequency processing circuit 14 are the same, the first intermediate frequency processing circuit 9 comprises a band-pass filter circuit E, a gain control circuit, an amplifying circuit, a second temperature compensation circuit and a fourth low-pass filter circuit, the gain control circuit comprises a numerical control attenuation circuit, an electric regulation attenuation circuit and a fixed attenuation circuit, the band-pass filter circuit E, the gain control circuit comprises a numerical control attenuation circuit, an electric regulation attenuation circuit and a fixed attenuation circuit which are connected in series, and the output end of the fourth band-pass filter circuit 19 is connected to the input end of the second mixing circuit 12; the output terminal of the second mixer circuit 12 is connected to the input terminal of the second band-pass filter circuit 13, the output terminal of the second band-pass filter circuit 13 is connected to the input terminal of the second intermediate frequency processing circuit 14, and the output terminal of the second intermediate frequency processing circuit 14 outputs the radio frequency signal IF.
This improve circuit of broadband frequency conversion receiving module amplitude and phase uniformity, dot frequency source LO2 is the dot frequency source of fixed frequency, first intermediate frequency processing circuit 9 and second intermediate frequency processing circuit 14 output have the fixed intermediate frequency signal of a certain bandwidth, common frequency has 70MHz, 140MHz, the amplitude compensation of amplitude compensation circuit 10 is 1 unit, can carry out amplitude compensation according to the amplitude calibration signal that the correction system of fig. 2 provided, amplitude compensation circuit 10 is located between first intermediate frequency processing circuit 9 and the second low pass filter circuit 11, carry out amplitude adjustment to intermediate frequency IF1 signal, thereby reach the effect of amplitude compensation. The phase compensation circuit 17 is a phase compensation 1 unit, and performs amplitude compensation according to the amplitude calibration signal given by the correction system of fig. 2, and the phase compensation circuit 17 is located before the second local oscillator processing circuit 18, and performs phase adjustment on the point frequency source LO2, thereby achieving the effect of phase compensation.
Example 2:
referring to fig. 3, a circuit for improving amplitude-phase consistency of a wideband frequency conversion receiving module is provided, in which an output terminal of a second intermediate frequency processing circuit 14 is connected to a mixing circuit a, a band-pass filter circuit B, an intermediate frequency amplifying circuit C, a band-pass filter circuit D and a local oscillator processing circuit D, an input terminal of the mixing circuit a is connected to an output terminal of the second intermediate frequency processing circuit 14, an output terminal of the mixing circuit a is connected to an input terminal of the band-pass filter circuit B, an output terminal of the band-pass filter circuit B is connected to an input terminal of the intermediate frequency amplifying circuit C, and an output terminal of the intermediate frequency amplifying circuit C outputs a radio frequency signal IF; the input end of the local oscillator processing circuit D is connected to the frequency source LO3, the output end of the local oscillator processing circuit D is connected to the input end of the band-pass filter circuit D, the output end of the band-pass filter circuit D is connected to the input end of the frequency mixing circuit a, wherein the model of the frequency mixing circuit a is the same as that of the first frequency mixing circuit 7, the model of the band-pass filter circuit D is the same as that of the third band-pass filter circuit 16, the model of the local oscillator processing circuit D is the same as that of the first local oscillator processing circuit 15, the second intermediate frequency processing circuit 14 finally outputs the radio frequency signal IF2, the dot frequency source LO3 input at the input end of the local oscillator processing circuit D is a dot frequency source with a fixed frequency, the radio frequency signal IF finally output by the intermediate frequency amplifying circuit C is a fixed intermediate frequency signal with a certain bandwidth, the common frequencies are 70MHz and 140MHz, the amplitude compensation of the amplitude compensation circuit 10 is 1 unit, and the amplitude compensation can be performed according to the amplitude calibration signal given by the calibration system of fig. 2, the amplitude compensation circuit 10 is located between the first intermediate frequency processing circuit 9 and the second low pass filter circuit 11, and performs amplitude adjustment on the intermediate frequency IF1 signal, so as to achieve the effect of amplitude compensation, the phase compensation circuit 17 is a phase compensation 1 unit, performs amplitude compensation according to the amplitude calibration signal given by the correction system of fig. 2, and the phase compensation circuit 17 is located before the second local oscillator processing circuit 18, and performs phase adjustment on the point frequency source LO2, so as to achieve the effect of phase compensation.
In summary, the following steps: this improve circuit of broadband frequency conversion receiving module amplitude and phase uniformity, need become the fixed intermediate frequency signal that has certain bandwidth with radio frequency received signal through once frequency conversion aftertreatment, to the amplitude compensation of fixed dot frequency signal realize more easily, and because its frequency bandwidth is narrow, compensate it and can not cause the worsening of broadband received signal gain flatness, improve the efficiency and the reliability of channel calibration. The phase calibration unit is located on the first local oscillator processing circuit 15, because the fixed dot frequency is adopted by the dot frequency source whose frequency is fixed by the dot frequency source LO2 and the dot frequency source LO3, the deterioration of the gain flatness of the broadband received signal will not be caused by performing the phase compensation on the fixed dot frequency, and the accuracy of the phase compensation is very high, thereby greatly improving the efficiency and reliability of the channel calibration.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a circuit for improve broadband frequency conversion receiving module amplitude and phase uniformity, including calibration coupling circuit (1), radio frequency preselection circuit (2), programmable circuit (3), radio frequency amplifier circuit (4), first temperature compensation circuit (5), first low pass filter circuit (6), first mixing circuit (7), first band-pass filter circuit (8), first intermediate frequency treatment circuit (9), amplitude compensation circuit (10), second low pass filter circuit (11), second mixing circuit (12), second band-pass filter circuit (13), second intermediate frequency treatment circuit (14), first local oscillator treatment circuit (15), third band-pass filter circuit (16), phase compensation circuit (17), second local oscillator treatment circuit (18) and fourth band-pass filter circuit (19), its characterized in that: the input end of the calibration coupling circuit (1) is connected with the input end of an RF signal and the input end of a calibration signal, the output end of the calibration coupling circuit (1) is connected with the input end of the radio frequency preselection circuit (2), the output end of the radio frequency preselection circuit (2) is connected with the input end of the programmable circuit (3), the output end of the programmable circuit (3) is connected with the input end of the radio frequency amplification circuit (4), the output end of the radio frequency amplification circuit (4) is connected with the input end of the first temperature compensation circuit (5), the output end of the first temperature compensation circuit (5) is connected with the input end of the first low-pass filter circuit (6), and the output end of the first low-pass filter circuit (6) is connected with the input end of the first mixer circuit (7); the input end of the first local oscillator processing circuit (15) is connected with the input end of a broadband frequency hopping source LO1, the output end of the first local oscillator processing circuit (15) is connected to the input end of a third band-pass filter circuit (16), and the output end of the third band-pass filter circuit (16) is connected to the input end of the first mixing circuit (7); the output end of the first mixing circuit (7) is connected to the input end of a first band-pass filter circuit (8), the output end of the first band-pass filter circuit (8) is connected to the input end of a first intermediate frequency processing circuit (9), the output end of the first intermediate frequency processing circuit (9) is connected to the input end of an amplitude compensation circuit (10), the output end of the amplitude compensation circuit (10) is connected to the input end of a second low-pass filter circuit (11), and the output end of the second low-pass filter circuit (11) is connected to the input end of a second mixing circuit (12); the input end of the phase compensation circuit (17) is connected to the input end of a point frequency source LO2, the output end of the phase compensation circuit (17) is connected to the input end of a second local oscillator processing circuit (18), the output end of the second local oscillator processing circuit (18) is connected to the input end of a fourth band-pass filter circuit (19), and the output end of the fourth band-pass filter circuit (19) is connected to the input end of a second mixer circuit (12); the output end of the second mixing circuit (12) is connected to the input end of a second band-pass filter circuit (13), the output end of the second band-pass filter circuit (13) is connected to the input end of a second intermediate frequency processing circuit (14), and the output end of the second intermediate frequency processing circuit (14) outputs a radio frequency signal IF; the first local oscillation processing circuit (15) and the second local oscillation processing circuit (18) are the same in model, the first local oscillation processing circuit (15) comprises a phase shift control circuit, an amplifying circuit and a filter circuit, and the phase shift control circuit comprises a numerical control phase shift circuit, an electric regulation phase shift circuit and a fixed phase shift circuit.
2. The circuit for improving amplitude-phase consistency of a broadband frequency conversion receiving module according to claim 1, wherein: the radio frequency preselection circuit (2) comprises a frequency segmentation preselection circuit, a dynamic expansion circuit, a signal amplification circuit, an amplitude equalization circuit and a third low-pass filter circuit.
3. The circuit for improving amplitude-phase consistency of a broadband frequency conversion receiving module according to claim 1, wherein: the first intermediate frequency processing circuit (9) and the second intermediate frequency processing circuit (14) are the same in model, the first intermediate frequency processing circuit (9) comprises a band-pass filter circuit E, a gain control circuit, an amplifying circuit, a second temperature compensation circuit and a fourth low-pass filter circuit, and the gain control circuit comprises a numerical control attenuation circuit, an electric regulation attenuation circuit and a fixed attenuation circuit.
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| CN201911305600.8A CN111130573B (en) | 2019-12-18 | 2019-12-18 | Circuit for improving amplitude-phase consistency of broadband variable-frequency receiving module |
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| CN201911305600.8A CN111130573B (en) | 2019-12-18 | 2019-12-18 | Circuit for improving amplitude-phase consistency of broadband variable-frequency receiving module |
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| CN111130573B true CN111130573B (en) | 2021-11-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441770A (en) * | 2013-08-26 | 2013-12-11 | 上海航天测控通信研究所 | Wideband receiving channels, receiver and receiving method with amplitude and phase compensation |
| CN108445483A (en) * | 2018-03-16 | 2018-08-24 | 成都锦江电子系统工程有限公司 | Water floats plant radar sensing system |
| CN209388160U (en) * | 2019-02-27 | 2019-09-13 | 武汉博畅通信设备有限责任公司 | A kind of multichannel receiver width phase compensation circuit based on FPGA |
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- 2019-12-18 CN CN201911305600.8A patent/CN111130573B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441770A (en) * | 2013-08-26 | 2013-12-11 | 上海航天测控通信研究所 | Wideband receiving channels, receiver and receiving method with amplitude and phase compensation |
| CN108445483A (en) * | 2018-03-16 | 2018-08-24 | 成都锦江电子系统工程有限公司 | Water floats plant radar sensing system |
| CN209388160U (en) * | 2019-02-27 | 2019-09-13 | 武汉博畅通信设备有限责任公司 | A kind of multichannel receiver width phase compensation circuit based on FPGA |
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