CN113630354A - Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method - Google Patents
Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method Download PDFInfo
- Publication number
- CN113630354A CN113630354A CN202111010573.9A CN202111010573A CN113630354A CN 113630354 A CN113630354 A CN 113630354A CN 202111010573 A CN202111010573 A CN 202111010573A CN 113630354 A CN113630354 A CN 113630354A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- broadband
- local oscillator
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 65
- 230000005284 excitation Effects 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 10
- 230000010355 oscillation Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0483—Transmitters with multiple parallel paths
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a broadband phased array multifunctional reconfigurable radio frequency assembly and a signal generating method, wherein a radio frequency link architecture comprises a broadband and narrowband composite signal source, a reconfigurable frequency conversion assembly and a T/R assembly, wherein the broadband and narrowband composite signal source outputs a broadband intermediate frequency excitation signal and a narrowband low intermediate frequency excitation signal; the reconfigurable frequency conversion component comprises a receiving and transmitting common three-level local oscillator. The reconfigurable signal generation and processing capability covering C, X, Ku three octaves is realized by matching a three-level frequency conversion scheme of a frequency-adjustable first-level local oscillator, a double-frequency-point second-level local oscillator and a single-frequency-point third-level local oscillator with broadband and narrowband composite excitation input, the working frequency range of the phase control array surface system is greatly increased, and the flexibility of signal processing types is improved; the common design is adopted at the main parts of the three-level frequency conversion assembly, the switch filter bank, the T/R module and other link circuits, so that the size, the weight and the production cost of the system are saved, and the utilization rate of resources is improved.
Description
Technical Field
The invention belongs to the technical field of active phased array systems, and particularly relates to a broadband phased array multifunctional reconfigurable radio frequency assembly and a signal generation method.
Background
In recent years, under the traction of information technology, microelectronics and other technologies, the trend of the new generation of phased array surface information systems towards informatization and data integration is developing, the types and data volumes of data information to be processed on the systems are continuously increasing, and higher requirements are made on the functions and performances of system signal generators and processing units. Multimode and reconfigurable are one of the main development directions of the current phased array system.
With the increase of the variety, complexity and data volume of information in the new generation of electronic information systems, the requirements on the real-time performance, concurrent processing capability and the like of signal generation and processing are higher and higher. In the aspect of signal reconnaissance, the receiver has the characteristics of wide coverage frequency range, large instantaneous bandwidth, high sensitivity, large dynamic range and the like, and can perform parallel interception and reception on signals of different frequency bands and different bandwidths which arrive at the same time and perform corresponding real-time processing on the intercepted signals; in radar detection, unlike reconnaissance, it is often necessary to generate a radar waveform with a narrow bandwidth while processing radar echoes with similar frequency bands and bandwidths. The two specific application requirements with opposite requirements provide strict requirements for the signal coverage, the adaptation degree and the reconstruction capability of the phased array system, and the prior art cannot meet the use requirements of multiple tasks such as passive reconnaissance, radar detection and the like in the multifunctional integrated comprehensive phased array system.
Disclosure of Invention
The invention aims to provide a broadband phased array multifunctional reconfigurable radio frequency assembly and a signal generating method, wherein a signal source of the broadband phased array multifunctional reconfigurable radio frequency assembly has the capability of generating broadband and narrowband signals, and the signal self-adaptive reconfigurable frequency conversion capability is realized in a broadband range by sharing a graded adjustable filter and a local vibration source in a receiving/transmitting link, so that the requirements of a phased array system on the working modes of multifunctional multitask integration such as reconnaissance, detection and the like are met.
The technical solution for realizing the purpose of the invention is as follows: a broadband phased array multifunctional reconfigurable radio frequency assembly comprises a broadband and narrowband composite signal source, a reconfigurable frequency conversion assembly and a T/R assembly in a radio frequency link architecture, wherein:
the wide-band and narrow-band composite signal source comprises a DSP module and an FPGA, the master control upper computer is connected with the FPGA through the DSP module, the FPGA outputs a wide-band intermediate-frequency excitation signal through a wide-band DAC module, and outputs a narrow-band low-intermediate-frequency excitation signal through a narrow-band DAC module;
the reconfigurable frequency conversion component comprises a receiving link and a three-level local oscillator shared by a transmitting link, wherein the first-level local oscillator has a frequency modulation function, after a signal and the first-level local oscillator pass through the mixer, the down conversion from a radio frequency signal amplified by the array surface T/R component to a medium-high frequency is realized in the receiving link, and the up conversion from the medium-high frequency signal to radio frequency radiation of the array surface T/R component is realized in the transmitting link; the secondary local oscillator adopts double fixed frequency points, after the signals and the secondary local oscillator pass through the frequency mixer, the down-conversion from the medium-high frequency signals to the intermediate-frequency broadband DBF is realized in the receiving link, and the up-conversion from the broadband intermediate-frequency excitation signals to the medium-high frequency is realized in the transmitting link; and the third-level local oscillator adopts a single fixed frequency point, the down-conversion from the intermediate frequency signal to the narrow-band DBF is realized in the receiving link, and the up-conversion from the narrow-band low intermediate frequency excitation signal to the intermediate frequency is realized in the transmitting link.
As a specific implementation manner, in the wideband/narrowband composite signal source, the DSP module includes a digital signal processor, an address decoder, and a peripheral circuit, and a parameter resolving module and a digital frequency storage module are disposed in the digital signal processor; a decoding circuit, a control circuit, a software algorithm module and an amplitude modulation generator are arranged in the FPGA;
the DSP module receives a command sent by the master control upper computer, and the parameter settlement module puts the solved parameters into a corresponding internal circuit to control the working states of the internal circuit and the digital frequency storage module; the digital frequency storage module is accessed to an external frequency storage signal and provides an input reference for the parameter resolving module through digital sampling;
the FPGA is internally provided with a signal generator, a software algorithm module and an amplitude modulation generator jointly generate various amplitude modulation signals, and the bandwidth of the signals is jointly determined by the bandwidth types of the main control and frequency storage signals; the narrow-band signal stray output by the signal generator is not higher than-65 dBc, and the wide-band signal stray is not higher than-50 dBc.
As a specific implementation manner, the three-level local oscillator shared by the receiving link and the transmitting link in the reconfigurable frequency conversion component specifically includes a preselection filter bank, a first-level mixer, a switch filtering and amplifying component, a second-level mixer, a signal amplifier, a filter, and a third-level mixer, which are sequentially arranged, the T/R component is connected with the preselection filter bank, the first-level local oscillator is connected to the first-level mixer through the first-level amplifier, and the second-level local oscillator is connected to the second-level mixer through the second-level amplifier.
As a specific implementation, the receiving link is specifically as follows:
a first numerical control module is arranged between the preselection filter bank and the primary mixer, a filtering module is arranged between the secondary mixer and the signal amplifier, one end of the signal amplifier is connected with the filtering module, and the other end of the signal amplifier is connected to the power divider through a second numerical control module; one output end of the power divider is connected with the broadband DBF module through a first filter, the other output end of the power divider is connected with the three-stage mixer through a second filter, and the output of the three-stage mixer is connected with the narrowband DBF module.
As a specific implementation, the transmission link is specifically as follows:
a single-pole double-throw switch is arranged between the signal amplifier and the filter, a broadband intermediate frequency excitation signal is accessed to one input end of the single-pole double-throw switch through the first filter, and a narrowband low intermediate frequency excitation signal is accessed to the other input end of the single-pole double-throw switch through the three-stage mixer and the second filter; and an equalizing module is arranged between the first-stage mixer and the preselection filter bank.
A broadband phased array multifunctional reconfigurable radio frequency signal generation method is based on a broadband phased array multifunctional reconfigurable radio frequency assembly, a frequency modulation primary local oscillator, a double-frequency-point secondary local oscillator and a single-frequency-point tertiary local oscillator are adopted in a tertiary frequency conversion mode, and a reconfigurable signal covering C, X, Ku three octaves in total is generated by matching with broadband and narrowband composite excitation input.
In a receiving state, after the radio-frequency signal received by the phase control array surface is amplified and phase-shifted by the T/R module, the radio-frequency signal is processed by a pre-selection filter group at the front stage, and is subjected to frequency mixing with an adjustable local oscillator at the first stage and then is converted into a medium-high frequency signal in a down-conversion mode; then, second down-conversion is carried out through local oscillation frequency points corresponding to a second-stage local oscillation of the two-stage double fixed point frequency, and the first-stage medium-high frequency signal is down-converted to form an intermediate frequency signal; the intermediate frequency signal is divided into two parts through a power divider, wherein one part of the intermediate frequency signal is sent to a broadband DBF module for processing, so that the detection, analysis and identification of broadband reconnaissance signal pulse description words are realized; and the other path of the signal is subjected to three-level frequency conversion of a single fixed frequency point to form a narrow-band low-intermediate frequency signal, and the narrow-band low-intermediate frequency signal is sent to a narrow-band DBF module for processing, so that the radar echo detection function is realized.
In a specific implementation mode, in a transmitting state, a broadband and narrowband radio frequency excitation signal input by a broadband and narrowband composite signal source is subjected to time delay compensation according to bandwidth requirements, and then is subjected to network distribution and amplification to drive a front end TR component;
the narrow-band low-intermediate frequency excitation signal used for the radar function is firstly mixed with a single-frequency point three-level local oscillator signal to form an intermediate frequency signal, then is mixed with a double-fixed-point frequency two-level local oscillator to a medium-high frequency after being selected by a switch, and finally is mixed with a first-level adjustable local oscillator to form a radio frequency signal capable of covering C, X, Ku three frequency ranges, and the radio frequency signal is amplified and radiated by a T/R assembly and a front antenna; the broadband intermediate frequency excitation input signal is directly mixed with a secondary local oscillator to a medium-high frequency, then is up-converted to a radio frequency through a primary local oscillator and is amplified and radiated through a T/R assembly and a front antenna.
Compared with the prior art, the invention has the following remarkable advantages: (1) broadband and narrowband excitation signals can be generated simultaneously through the composite signal source, so that the use requirements of multiple tasks such as passive reconnaissance, radar detection and the like in the multifunctional integrated comprehensive phased array system are met; (2) the reconfigurable signal generation and processing capability covering C, X, Ku three octaves is realized by matching a three-level frequency conversion scheme of a frequency-adjustable first-level local oscillator, a double-frequency-point second-level local oscillator and a single-frequency-point third-level local oscillator with broadband and narrowband composite excitation input, the working frequency range of the phase control array surface system is greatly increased, and the flexibility of signal processing types is improved; (3) the common design is adopted at the main parts of the three-level frequency conversion assembly, the switch filter bank, the T/R module and other link circuits, so that the size, the weight and the production cost of the system are saved, and the utilization rate of resources is improved.
Drawings
Fig. 1 is a schematic structural diagram of the broadband phased array multifunctional reconfigurable radio frequency assembly.
Fig. 2 is a block diagram of a wideband/narrowband composite signal source.
Fig. 3 is a circuit block diagram of a receive chain frequency conversion component.
Fig. 4 is a circuit block diagram of a transmit chain frequency conversion component.
Detailed Description
The invention provides a broadband phased array multifunctional reconfigurable radio frequency assembly and a signal generating method. The signal generator of the wide-band and narrow-band composite signal source mainly comprises a DSP module, an FPGA, an interface circuit and control software, and finally two paths of input signals of low-intermediate-frequency and wide-band excitation and medium-frequency band excitation can be respectively output. The reconfigurable frequency conversion component is divided into three stages and adopts a common design of a transmitting link and a receiving link. The signal and the signal realize down-conversion (receiving link) from the radio frequency signal amplified by the array surface T/R component to medium-high frequency and up-conversion (transmitting link) from the medium-high frequency signal to the radio frequency radiation of the array surface T/R component through a mixer; the second-level local oscillator adopts double fixed frequency points, and realizes down-conversion (a broadband receiving link) from a medium-high frequency signal to an intermediate-frequency broadband DBF and up-conversion (a transmitting link) from a broadband intermediate-frequency excitation input signal to medium-high frequency through a frequency mixer; the three-level local oscillator adopts a single fixed frequency point and is mainly used for up-conversion (transmitting link) from an intermediate frequency signal to a narrow-band DBF (narrow-band receiving link) and from a narrow-band low intermediate frequency excitation input signal to an intermediate frequency during narrow-band signal processing.
The design principle of the broadband phased array multifunctional reconfigurable radio frequency signal generation method and the structure of a radio frequency link are described in detail below.
A broadband phased array multifunctional reconfigurable radio frequency assembly comprises a broadband and narrowband composite signal source, a reconfigurable frequency conversion assembly and a T/R assembly in a radio frequency link architecture, wherein:
the wide-band and narrow-band composite signal source comprises a DSP module and an FPGA, the master control upper computer is connected with the FPGA through the DSP module, the FPGA outputs a wide-band intermediate-frequency excitation signal through a wide-band DAC module, and outputs a narrow-band low-intermediate-frequency excitation signal through a narrow-band DAC module;
the reconfigurable frequency conversion component comprises a receiving link and a three-level local oscillator shared by a transmitting link, wherein the first-level local oscillator has a frequency modulation function, after a signal and the first-level local oscillator pass through the mixer, the down conversion from a radio frequency signal amplified by the array surface T/R component to a medium-high frequency is realized in the receiving link, and the up conversion from the medium-high frequency signal to radio frequency radiation of the array surface T/R component is realized in the transmitting link; the secondary local oscillator adopts double fixed frequency points, after the signals and the secondary local oscillator pass through the frequency mixer, the down-conversion from the medium-high frequency signals to the intermediate-frequency broadband DBF is realized in the receiving link, and the up-conversion from the broadband intermediate-frequency excitation signals to the medium-high frequency is realized in the transmitting link; and the third-level local oscillator adopts a single fixed frequency point, the down-conversion from the intermediate frequency signal to the narrow-band DBF is realized in the receiving link, and the up-conversion from the narrow-band low intermediate frequency excitation signal to the intermediate frequency is realized in the transmitting link.
As a specific implementation manner, in the wideband/narrowband composite signal source, the DSP module includes a digital signal processor, an address decoder, and a peripheral circuit, and a parameter resolving module and a digital frequency storage module are disposed in the digital signal processor; a decoding circuit, a control circuit, a software algorithm module and an amplitude modulation generator are arranged in the FPGA;
the DSP module receives a command sent by the master control upper computer, and the parameter settlement module puts the solved parameters into a corresponding internal circuit to control the working states of the internal circuit and the digital frequency storage module; the digital frequency storage module is accessed to an external frequency storage signal and provides an input reference for the parameter resolving module through digital sampling;
the FPGA is internally provided with a signal generator, a software algorithm module and an amplitude modulation generator jointly generate various amplitude modulation signals, and the bandwidth of the signals is jointly determined by the bandwidth types of the main control and frequency storage signals; the narrow-band signal stray output by the signal generator is not higher than-65 dBc, and the wide-band signal stray is not higher than-50 dBc.
As a specific implementation manner, the three-level local oscillator shared by the receiving link and the transmitting link in the reconfigurable frequency conversion component specifically includes a preselection filter bank, a first-level mixer, a switch filtering and amplifying component, a second-level mixer, a signal amplifier, a filter, and a third-level mixer, which are sequentially arranged, the T/R component is connected with the preselection filter bank, the first-level local oscillator is connected to the first-level mixer through the first-level amplifier, and the second-level local oscillator is connected to the second-level mixer through the second-level amplifier.
As a specific implementation, the receiving link is specifically as follows:
a first numerical control module is arranged between the preselection filter bank and the primary mixer, a filtering module is arranged between the secondary mixer and the signal amplifier, one end of the signal amplifier is connected with the filtering module, and the other end of the signal amplifier is connected to the power divider through a second numerical control module; one output end of the power divider is connected with the broadband DBF module through a first filter, the other output end of the power divider is connected with the three-stage mixer through a second filter, and the output of the three-stage mixer is connected with the narrowband DBF module.
As a specific implementation, the transmission link is specifically as follows:
a single-pole double-throw switch is arranged between the signal amplifier and the filter, a broadband intermediate frequency excitation signal is accessed to one input end of the single-pole double-throw switch through the first filter, and a narrowband low intermediate frequency excitation signal is accessed to the other input end of the single-pole double-throw switch through the three-stage mixer and the second filter; and an equalizing module is arranged between the first-stage mixer and the preselection filter bank.
A broadband phased array multifunctional reconfigurable radio frequency signal generation method is based on a broadband phased array multifunctional reconfigurable radio frequency assembly, a frequency modulation primary local oscillator, a double-frequency-point secondary local oscillator and a single-frequency-point tertiary local oscillator are adopted in a tertiary frequency conversion mode, and a reconfigurable signal covering C, X, Ku three octaves in total is generated by matching with broadband and narrowband composite excitation input.
In a receiving state, after the radio-frequency signal received by the phase control array surface is amplified and phase-shifted by the T/R module, the radio-frequency signal is processed by a pre-selection filter group at the front stage, and is subjected to frequency mixing with an adjustable local oscillator at the first stage and then is converted into a medium-high frequency signal in a down-conversion mode; then, second down-conversion is carried out through local oscillation frequency points corresponding to a second-stage local oscillation of the two-stage double fixed point frequency, and the first-stage medium-high frequency signal is down-converted to form an intermediate frequency signal; the intermediate frequency signal is divided into two parts through a power divider, wherein one part of the intermediate frequency signal is sent to a broadband DBF module for processing, so that the detection, analysis and identification of broadband reconnaissance signal pulse description words are realized; and the other path of the signal is subjected to three-level frequency conversion of a single fixed frequency point to form a narrow-band low-intermediate frequency signal, and the narrow-band low-intermediate frequency signal is sent to a narrow-band DBF module for processing, so that the radar echo detection function is realized.
In a specific implementation mode, in a transmitting state, a broadband and narrowband radio frequency excitation signal input by a broadband and narrowband composite signal source is subjected to time delay compensation according to bandwidth requirements, and then is subjected to network distribution and amplification to drive a front end TR component;
the narrow-band low-intermediate frequency excitation signal used for the radar function is firstly mixed with a single-frequency point three-level local oscillator signal to form an intermediate frequency signal, then is mixed with a double-fixed-point frequency two-level local oscillator to a medium-high frequency after being selected by a switch, and finally is mixed with a first-level adjustable local oscillator to form a radio frequency signal capable of covering C, X, Ku three frequency ranges, and the radio frequency signal is amplified and radiated by a T/R assembly and a front antenna; the broadband intermediate frequency excitation input signal is directly mixed with a secondary local oscillator to a medium-high frequency, then is up-converted to a radio frequency through a primary local oscillator and is amplified and radiated through a T/R assembly and a front antenna.
By the broadband phased array multifunctional reconfigurable radio frequency signal generation method, broadband and narrowband excitation signals can be generated simultaneously, so that the use requirements of multiple tasks such as passive reconnaissance, radar detection and the like in a multifunctional integrated comprehensive phased array system are met; the reconfigurable signal generation and processing capability covering C, X, Ku three octaves is realized by matching a three-level frequency conversion scheme of a frequency-adjustable first-level local oscillator, a double-frequency-point second-level local oscillator and a single-frequency-point third-level local oscillator with broadband and narrowband composite excitation input, the working frequency range of the phase control array surface system is greatly increased, and the flexibility of signal processing types is improved; the common design is adopted at the main parts of the three-level frequency conversion assembly, the switch filter bank, the T/R module and other link circuits, so that the size, the weight and the production cost of the system are saved, and the utilization rate of resources is improved.
The invention is described in further detail below with reference to the figures and the embodiments.
Examples
With reference to fig. 1, a broadband phased array multifunctional reconfigurable radio frequency assembly includes a broadband and narrowband composite signal source, a reconfigurable frequency conversion assembly and a T/R assembly in a radio frequency link architecture, where:
in a composite signal source, the technology of digital frequency storage (DRFM) is adopted, a signal generator mainly comprises a DSP module, an FPGA, an interface circuit and control software, and a block diagram of the signal generator is shown in fig. 2, and finally two input signals of low-intermediate frequency narrowband excitation and medium-frequency wideband excitation are respectively output.
The DSP module in the composite signal generator consists of a high-speed digital signal processor, an address decoder and other peripheral circuits, and the DSP module receives a command sent by a main control upper computer, calculates parameters, puts the calculated parameters into corresponding circuits and controls the working states of an internal circuit and a digital frequency storage module. The software of the DSP module and the amplitude modulation generator together generate various amplitude modulation signals. And the main functional circuit of the signal generator is realized in a large-scale FPGA and comprises a decoding circuit, a control circuit and the like. In order to meet the application requirements of the whole system in radar and reconnaissance, the narrow-band signal stray output by the composite signal generator should not be higher than-65 dBc, and the wide-band signal stray should not be higher than-50 dBc.
In order to save the size, weight and production cost of the system and improve the utilization rate of resources, the first-level, second-level and third-level adjustable frequency conversion components in the receiving/transmitting link and the T/R module of the array surface all adopt a common design, and can simultaneously complete the up-conversion and down-conversion functions of broadband and narrowband signals. The following description is from the two states of reception and transmission, respectively.
In a receiving state, the radio frequency signal received by the phase control array surface is processed by a pre-selection filter bank at the front stage after being amplified and phase-shifted by the T/R module, and is down-converted into a medium-high frequency signal after being mixed with a first-stage adjustable local oscillator; and then, carrying out second down-conversion through local oscillation frequency points corresponding to the second-level local oscillation of the two-section double fixed point frequency, and down-converting the first-level medium-high frequency signal to form an intermediate frequency signal. The intermediate frequency signal is divided into two parts by a power divider, wherein one part is sent to a broadband digital beam synthesis (DBF) module for processing, so that the detection, analysis and identification of a broadband reconnaissance signal pulse description word are realized; and the other path of the signal is subjected to three-level frequency conversion with a single fixed frequency point to form a narrow-band low-intermediate frequency signal, and the narrow-band low-intermediate frequency signal is sent to a narrow-band DBF module for processing, so that the radar echo detection function is realized. The frequency conversion link block diagram of the receiving link is shown in fig. 3, wherein the dark color part is a component shared by the transceiving links.
In the transmitting state, the broadband and narrowband radio frequency excitation signals input by the composite signal source are subjected to time delay compensation according to the bandwidth requirement, and then are distributed and amplified through a network to drive the front end TR component. The narrow-band low-intermediate frequency excitation input signal used for the radar function is firstly mixed with a single-frequency point three-level local oscillator signal to form an intermediate frequency signal, then the intermediate frequency signal is mixed with a double-fixed-point frequency two-level local oscillator to a medium-high frequency after being selected by a switch, and finally the intermediate frequency signal is mixed with a first-level adjustable local oscillator to a radio frequency signal capable of covering C, X, Ku three frequency ranges and is amplified and radiated by a T/R assembly and a front antenna; the broadband intermediate frequency excitation input signal is directly mixed with a secondary local oscillator to a medium-high frequency, then is up-converted to a radio frequency through a primary local oscillator and is amplified and radiated through a T/R assembly and a front antenna. The frequency conversion link block diagram of the transmission link is shown in fig. 4, wherein the dark part is a component shared by the transceiving links.
The method for generating the broadband phased array multifunctional reconfigurable radio frequency signal in the embodiment has an integrated signal source with broadband and narrowband signals. The design of the wide-band and narrow-band integrated signal source enables the system to have a working mode with integrated functions of detection, reconnaissance and the like, and provides a basis for multifunctional reconstruction of equipment. The transmitting and receiving links required by the functions of detection, dry detection and the like adopt a common design at the main parts of the links such as the upper and lower frequency conversion assemblies, the switch filter bank, the T/R module and the like, thereby saving the size, the weight and the production cost of the system and improving the utilization rate of resources. In order to adapt to the signal processing requirement with a large spectrum distribution range, the reconfigurable frequency synthesis capability of radio frequency signals is realized by adopting a graded adjustable filter and a local vibration source, and the graded frequency conversion and filtering module is also shared in a broadband and narrowband public transceiving link, which provides a reconfigurable hardware basis for various signal processing functions of system random self-adaptation.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (8)
1. A broadband phased array multifunctional reconfigurable radio frequency assembly is characterized in that a radio frequency link architecture comprises a broadband and narrowband composite signal source, a reconfigurable frequency conversion assembly and a T/R assembly, wherein:
the wide-band and narrow-band composite signal source comprises a DSP module and an FPGA, the master control upper computer is connected with the FPGA through the DSP module, the FPGA outputs a wide-band intermediate-frequency excitation signal through a wide-band DAC module, and outputs a narrow-band low-intermediate-frequency excitation signal through a narrow-band DAC module;
the reconfigurable frequency conversion component comprises a receiving link and a three-level local oscillator shared by a transmitting link, wherein the first-level local oscillator has a frequency modulation function, after a signal and the first-level local oscillator pass through the mixer, the down conversion from a radio frequency signal amplified by the array surface T/R component to a medium-high frequency is realized in the receiving link, and the up conversion from the medium-high frequency signal to radio frequency radiation of the array surface T/R component is realized in the transmitting link; the secondary local oscillator adopts double fixed frequency points, after the signals and the secondary local oscillator pass through the frequency mixer, the down-conversion from the medium-high frequency signals to the intermediate-frequency broadband DBF is realized in the receiving link, and the up-conversion from the broadband intermediate-frequency excitation signals to the medium-high frequency is realized in the transmitting link; and the third-level local oscillator adopts a single fixed frequency point, the down-conversion from the intermediate frequency signal to the narrow-band DBF is realized in the receiving link, and the up-conversion from the narrow-band low intermediate frequency excitation signal to the intermediate frequency is realized in the transmitting link.
2. The broadband phased array multifunctional reconfigurable radio frequency assembly according to claim 1, wherein in the broadband and narrowband composite signal source, the DSP module comprises a digital signal processor, an address decoder and a peripheral circuit, and a parameter resolving module and a digital frequency storage module are arranged in the digital signal processor; a decoding circuit, a control circuit, a software algorithm module and an amplitude modulation generator are arranged in the FPGA;
the DSP module receives a command sent by the master control upper computer, and the parameter settlement module puts the solved parameters into a corresponding internal circuit to control the working states of the internal circuit and the digital frequency storage module; the digital frequency storage module is accessed to an external frequency storage signal and provides an input reference for the parameter resolving module through digital sampling;
the FPGA is internally provided with a signal generator, a software algorithm module and an amplitude modulation generator jointly generate various amplitude modulation signals, and the bandwidth of the signals is jointly determined by the bandwidth types of the main control and frequency storage signals; the narrow-band signal stray output by the signal generator is not higher than-65 dBc, and the wide-band signal stray is not higher than-50 dBc.
3. The broadband phased array multifunctional reconfigurable radio frequency assembly according to claim 2, wherein in the reconfigurable frequency conversion assembly, the three-level local oscillator shared by the receiving link and the transmitting link specifically comprises a preselection filter bank, a first-level mixer, a switch filtering and amplifying assembly, a second-level mixer, a signal amplifier, a filter and a third-level mixer which are sequentially arranged, the T/R assembly is connected with the preselection filter bank, the first-level local oscillator is connected to the first-level mixer through the first-level amplifier, and the second-level local oscillator is connected to the second-level mixer through the second-level amplifier.
4. The broadband phased array multifunctional reconfigurable radio frequency assembly according to claim 3, wherein the receiving link is specifically as follows:
a first numerical control module is arranged between the preselection filter bank and the primary mixer, a filtering module is arranged between the secondary mixer and the signal amplifier, one end of the signal amplifier is connected with the filtering module, and the other end of the signal amplifier is connected to the power divider through a second numerical control module; one output end of the power divider is connected with the broadband DBF module through a first filter, the other output end of the power divider is connected with the three-stage mixer through a second filter, and the output of the three-stage mixer is connected with the narrowband DBF module.
5. The broadband phased array multifunctional reconfigurable radio frequency assembly according to claim 3, wherein the transmission link is specifically as follows:
a single-pole double-throw switch is arranged between the signal amplifier and the filter, a broadband intermediate frequency excitation signal is accessed to one input end of the single-pole double-throw switch through the first filter, and a narrowband low intermediate frequency excitation signal is accessed to the other input end of the single-pole double-throw switch through the three-stage mixer and the second filter; and an equalizing module is arranged between the first-stage mixer and the preselection filter bank.
6. A broadband phased array multifunctional reconfigurable radio frequency signal generation method is characterized in that a frequency modulation primary local oscillator, a double-frequency-point secondary local oscillator and a single-frequency-point tertiary local oscillator are adopted in a three-level frequency conversion mode based on the broadband phased array multifunctional reconfigurable radio frequency assembly according to any one of claims 1 to 5, and a reconfigurable signal covering C, X, Ku three octaves in total is generated by matching with broadband and narrowband composite excitation input.
7. The method for generating the broadband phased array multifunctional reconfigurable radio frequency signal according to claim 6, characterized in that in a receiving state, the radio frequency signal received by a phased array surface is processed by a preselection filter bank at a previous stage after being amplified and phase-shifted by a T/R module, is mixed with an adjustable local oscillator at a first stage and then is down-converted into a medium-high frequency signal; then, second down-conversion is carried out through local oscillation frequency points corresponding to a second-stage local oscillation of the two-stage double fixed point frequency, and the first-stage medium-high frequency signal is down-converted to form an intermediate frequency signal; the intermediate frequency signal is divided into two parts through a power divider, wherein one part of the intermediate frequency signal is sent to a broadband DBF module for processing, so that the detection, analysis and identification of broadband reconnaissance signal pulse description words are realized; and the other path of the signal is subjected to three-level frequency conversion of a single fixed frequency point to form a narrow-band low-intermediate frequency signal, and the narrow-band low-intermediate frequency signal is sent to a narrow-band DBF module for processing, so that the radar echo detection function is realized.
8. The method for generating the broadband phased array multifunctional reconfigurable radio frequency signal according to claim 6, wherein in a transmitting state, a broadband and narrowband radio frequency excitation signal input by a broadband and narrowband composite signal source is subjected to time delay compensation according to bandwidth requirements, and then is subjected to network distribution and amplification to drive a front end TR component;
the narrow-band low-intermediate frequency excitation signal used for the radar function is firstly mixed with a single-frequency point three-level local oscillator signal to form an intermediate frequency signal, then is mixed with a double-fixed-point frequency two-level local oscillator to a medium-high frequency after being selected by a switch, and finally is mixed with a first-level adjustable local oscillator to form a radio frequency signal capable of covering C, X, Ku three frequency ranges, and the radio frequency signal is amplified and radiated by a T/R assembly and a front antenna; the broadband intermediate frequency excitation input signal is directly mixed with a secondary local oscillator to a medium-high frequency, then is up-converted to a radio frequency through a primary local oscillator and is amplified and radiated through a T/R assembly and a front antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111010573.9A CN113630354B (en) | 2021-08-31 | 2021-08-31 | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111010573.9A CN113630354B (en) | 2021-08-31 | 2021-08-31 | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113630354A true CN113630354A (en) | 2021-11-09 |
| CN113630354B CN113630354B (en) | 2024-01-05 |
Family
ID=78388441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111010573.9A Active CN113630354B (en) | 2021-08-31 | 2021-08-31 | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113630354B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301487A (en) * | 2021-12-06 | 2022-04-08 | 东南大学 | Self-adaptive receiving and transmitting integrated frequency conversion assembly |
| CN114584164A (en) * | 2022-01-25 | 2022-06-03 | 北京邮电大学 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
| CN116470854A (en) * | 2023-06-19 | 2023-07-21 | 成都世源频控技术股份有限公司 | Broadband variable-frequency self-adaptive equalization instantaneous in-band flatness device |
| CN117060943A (en) * | 2023-07-24 | 2023-11-14 | 中国船舶集团有限公司第七二三研究所 | Ultra-wideband radio frequency front end covered by one-dimensional specific airspace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100259433A1 (en) * | 2007-05-10 | 2010-10-14 | Astrium Limited | Signal Processing System |
| CN106685535A (en) * | 2017-01-16 | 2017-05-17 | 电子科技大学 | Down-conversion method of reconfigurable microwave photonics and down-conversion device of the same |
| CN110927677A (en) * | 2019-11-28 | 2020-03-27 | 航天南湖电子信息技术股份有限公司 | Broadband low-power-consumption four-in-one receiver |
| CN112255593A (en) * | 2020-10-21 | 2021-01-22 | 武汉滨湖电子有限责任公司 | Frequency conversion assembly for target classification recognition radar |
| CN113093118A (en) * | 2021-03-18 | 2021-07-09 | 中国电子科技集团公司第二十研究所 | 6-18GHz frequency band continuous wave comprehensive radio frequency digital transmitting and receiving system |
-
2021
- 2021-08-31 CN CN202111010573.9A patent/CN113630354B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100259433A1 (en) * | 2007-05-10 | 2010-10-14 | Astrium Limited | Signal Processing System |
| CN106685535A (en) * | 2017-01-16 | 2017-05-17 | 电子科技大学 | Down-conversion method of reconfigurable microwave photonics and down-conversion device of the same |
| CN110927677A (en) * | 2019-11-28 | 2020-03-27 | 航天南湖电子信息技术股份有限公司 | Broadband low-power-consumption four-in-one receiver |
| CN112255593A (en) * | 2020-10-21 | 2021-01-22 | 武汉滨湖电子有限责任公司 | Frequency conversion assembly for target classification recognition radar |
| CN113093118A (en) * | 2021-03-18 | 2021-07-09 | 中国电子科技集团公司第二十研究所 | 6-18GHz frequency band continuous wave comprehensive radio frequency digital transmitting and receiving system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301487A (en) * | 2021-12-06 | 2022-04-08 | 东南大学 | Self-adaptive receiving and transmitting integrated frequency conversion assembly |
| CN114301487B (en) * | 2021-12-06 | 2024-01-09 | 东南大学 | Self-adaptive transceiving integrated frequency conversion assembly |
| CN114584164A (en) * | 2022-01-25 | 2022-06-03 | 北京邮电大学 | Frequency band reconfigurable radio frequency receiver front end facing multi-standard communication |
| CN116470854A (en) * | 2023-06-19 | 2023-07-21 | 成都世源频控技术股份有限公司 | Broadband variable-frequency self-adaptive equalization instantaneous in-band flatness device |
| CN116470854B (en) * | 2023-06-19 | 2023-09-05 | 成都世源频控技术股份有限公司 | Broadband variable-frequency self-adaptive equalization instantaneous in-band flatness device |
| CN117060943A (en) * | 2023-07-24 | 2023-11-14 | 中国船舶集团有限公司第七二三研究所 | Ultra-wideband radio frequency front end covered by one-dimensional specific airspace |
| CN117060943B (en) * | 2023-07-24 | 2024-04-23 | 中国船舶集团有限公司第七二三研究所 | Ultra-wideband radio frequency front end covered by one-dimensional specific airspace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113630354B (en) | 2024-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113630354B (en) | Broadband phased array multifunctional reconfigurable radio frequency assembly and signal generation method | |
| Cantrell et al. | Development of a digital array radar (DAR) | |
| CN109655797B (en) | High-performance generalized multi-channel radar system | |
| CN108051791A (en) | A kind of phased-array radar universal calibration device | |
| CN101964449A (en) | On-track correcting device of space-borne phased array transmitting antenna | |
| JP2001525149A (en) | Wireless system having FET mixer device and square wave drive switching circuit and method therefor | |
| CN108872955A (en) | Radar echo signal analogy method and system | |
| CN109379102A (en) | Multichannel frequency agility R-T unit | |
| CN114185008A (en) | System and method for compensating amplitude-phase error of receiving channel of narrow-band digital array radar system | |
| CN109975772B (en) | Multi-system radar interference performance detection system | |
| CN108254722A (en) | A kind of double frequency phased array radar system and its implementation | |
| CN104142447A (en) | High-stability and large-dynamics one-millimeter S parameter testing system | |
| CN218412928U (en) | Millimeter wave receiving and transmitting front end of improved active human body security inspection imaging system | |
| CN108847866A (en) | Radio-frequency front-end monkey chatter suppression circuit and WLAN access device | |
| CN114204950B (en) | High-performance broadband microwave receiving channel | |
| CN109343014B (en) | Apparatus and method for testing T/R component of phased array radar | |
| CN105577294A (en) | Multifunctional handheld passive intermodulation analyzer | |
| CN105429654A (en) | Frequency synthesizer for S-band wave observation radar | |
| CN210405302U (en) | Real-time frequency hopping communication interference suppression circuit structure | |
| CN116094563A (en) | Broadband multi-beam selective receiving module and electronic reconnaissance system | |
| CN214707702U (en) | Satellite beacon receiver | |
| US20210218368A1 (en) | On-chip diplexed multi-band submillimeter-wave/terahertz sources | |
| LU101283B1 (en) | Broadband RF transceiver architecture supporting dual modes of UWB and FMCW | |
| CN110940969A (en) | Digital T/R assembly for multi-beam DBF phased array system | |
| CN113419221A (en) | Multi-target interference signal generation method based on digital channelized frequency storage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |