CN110988810B - 300-plus-2000 MHz broadband digital TR (transmitter-receiver) component - Google Patents
300-plus-2000 MHz broadband digital TR (transmitter-receiver) component Download PDFInfo
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- CN110988810B CN110988810B CN201911320303.0A CN201911320303A CN110988810B CN 110988810 B CN110988810 B CN 110988810B CN 201911320303 A CN201911320303 A CN 201911320303A CN 110988810 B CN110988810 B CN 110988810B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/0209—Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S2013/0236—Special technical features
- G01S2013/0245—Radar with phased array antenna
- G01S2013/0254—Active array antenna
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- 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
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention provides a 300-plus-2000 MHz broadband digital TR component, wherein in a transmitting state, an FPGA controls a DDS to generate a corresponding waveform signal with an intermediate frequency of 400MHz through a frequency control word, a waveform control word and an initial phase control word, generates a high and medium frequency signal with a frequency of 2000MHz or 5000MHz through a mixer and a low local oscillation signal with a frequency of 1600MHz or 4600MHz in a local oscillation distribution circuit, completes a mixing effect with a high local oscillation signal with a frequency of 2300-plus-3000 MHz or 6-7GHz in the local oscillation distribution circuit through a filtering selection function of a switch filtering group, generates transmitting signals with frequencies covering 300-plus-1000 MHz and 1000-plus-2000 MHz respectively, and completes a transceiving switching effect through a circulator. The frequency range of 300-2000MHz is divided into two frequency ranges for frequency conversion processing respectively, and finally the low-speed ADC and the DAC realize waveform generation and echo sampling processing respectively, so that the preprocessing difficulty of a digital assembly is reduced, in-band spurious introduced by frequency conversion is avoided, and the assembly has the advantages of low cost, high integration level, flexible design and the like.
Description
Technical Field
The invention relates to the field of radars, in particular to a TR component, which is mainly designed for the front end of an L-band broadband active digital phased array radar.
Background
Active phased array (AESA) technology is a new technology for radars that has developed very rapidly in recent years. Compared with the traditional radar technologies such as monopulse, pulse Doppler and the like, the phased array technology brings more profound influence on the development of the radar technology. The advantage of the AESA technique is that the radar beam can hop freely very rapidly in space. The antenna array surface can be kept not to rotate, so that radar beams point to any airspace, the antenna can also be rotated, and the beams fixedly point to a certain area within a certain time, which cannot be realized by the traditional mechanical rotation radar. The successful application of the AESA is a revolution to the traditional airborne radar, the application field of the radar is greatly expanded, and the working performance of the radar is improved.
The digital receiving and transmitting system is one of key systems of each large subsystem of the radar and is the core of the radar of a digital array system in future. The traditional active phased array transmitting and receiving system has the defects of large volume, heavy weight, more radio frequency cables, low amplitude and phase control precision, inflexible control and the like, and is not suitable for the development trend of modern digital array radars. The system also has high sensitivity, high signal-to-noise ratio, and real-time processing capability. Therefore, it is necessary to develop an L-band digital transceiver system with excellent performance.
The research on L-band digital transceiver systems mostly adopts a primary mixing mode, which moves L-band radio frequency signals to an intermediate frequency, and performs digital down-conversion (DDC) and digital signal generation (DDS) at the intermediate frequency, and along with the increasing needs of radio frequency integrated aperture and multi-function task systems, the development of wideband digital components is urgently needed to support. The 300MHz-2000MHz covers different applications such as radar, navigation, communication, friend or foe identification, and the like, and a radio frequency front end, especially a digital component can cover a full frequency band to adapt to different function switching completed by different frequencies. At present, the 300-2000MHz broadband digital TR device is not reported, and if the design of the 300-2000MHz broadband digital TR device is completed by using a direct radio frequency generation and sampling manner, the main problems caused by the high sampling rate (avoiding nyquist overlapping) include high design difficulty and high cost, and a solution to this problem is urgently needed.
Disclosure of Invention
To overcome the deficiencies of the prior art, the present invention provides a 300-2000MHz wideband digital TR component. The active digital phased array radar front end is designed for an L-band broadband.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a300-plus-2000 MHz broadband digital TR component comprises a receiving link, a transmitting link and a local oscillator distribution circuit;
in a transmitting state, the FPGA generates a corresponding waveform signal with an intermediate frequency of 400MHz through a frequency control word, a waveform control word and an initial phase control word control DDS, generates a high-intermediate frequency signal with a frequency of 2000MHz or 5000MHz through a mixer and a low local oscillation signal with a frequency of 1600MHz or 4600MHz in a local oscillation distribution circuit, completes a mixing function with a high local oscillation signal with a frequency of 2300 plus 3000MHz or 6-7GHz in the local oscillation distribution circuit through a filtering selection function of a switch filtering group, generates transmitting signals with a frequency covering 300 plus materials of 1000MHz and 1000 plus materials of 2000MHz respectively, and completes a transceiving switching function through a circulator;
under the receiving state, after the echo signal is subjected to the low-noise amplification effect of a 300-2000MHz broadband, the frequency mixing effect is completed by a 2300-3000MHz or 6-7GHz high local oscillation signal, the obtained high and medium frequency signal is subjected to the filtering selection effect of a switch filtering group consisting of a 2GHz or 5GHz band-pass filter, then is mixed with a 1600MHz or 4600MHz low local oscillation signal to generate a 400MHz intermediate frequency signal, and the sampling, extracting and filtering effects are completed by matching a low-speed ADC (analog to digital converter) meeting the band-pass sampling theorem with an FPGA (field programmable gate array), so that a baseband signal of the echo signal is finally formed;
the FPGA finishes the control of frequency control words, waveform control words and initial phase control words of the DDS in a transmitting state and the extraction and filtering of echo signals in a receiving state, and finally baseband signals are formed; in addition, the FPGA needs to complete communication with the array surface control unit, receive the frequency control word, the waveform control word, and the initial phase control word of the array surface control unit during the transmission process, and download the processed echo baseband signal during the reception process; the FPGA also needs to implement real-time control of the switch filtering group, the local oscillator frequency, and the transceiver switch in the digital component.
The invention has the advantages that the frequency range of 300-2000MHz (over five octaves) is divided into two frequency ranges (300-1000MHz and 1000-2000MHz) for frequency conversion processing respectively, and finally the low-speed ADC and the DAC realize waveform generation and echo sampling processing respectively, thereby reducing the difficulty of digital component pretreatment compared with the scheme of directly generating and sampling by adopting radio frequency; corresponding high and medium frequency signals are respectively selected in the frequency conversion process of two frequency ranges (300-1000MHz and 1000-2000MHz) to avoid in-band spurious introduced by frequency conversion, the frequency of the high and medium frequency signals can be flexibly changed according to the frequency of the signals during system design so as to achieve the purpose of no in-band low-order spurious, the module has the advantages of low cost, high integration level, flexible design and the like, and the engineering design of the ultra-wideband (300-2000MHz) digital transceiving module can be completed by combining an analog circuit, a low-speed ADC and a DAC.
Drawings
FIG. 1 is a schematic circuit diagram of a 300-2000MHz broadband digital TR module of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, a 300-2000MHz broadband digital TR module includes a transceiving link and a local oscillator distribution circuit;
in the transmitting state, the FPGA generates a corresponding waveform signal with an intermediate frequency of 400MHz through a frequency control word, a waveform control word and an initial phase control word control DDS, generates a high and medium frequency signal with a frequency of 2000MHz or 5000MHz respectively through a mixer and a low local oscillation signal with a frequency of 1600MHz or 4600MHz, completes the mixing action with the high local oscillation signal with a frequency of 2300 plus 3000MHz or 6-7GHz respectively through the filtering selection action of a switch filtering group, generates transmitting signals with frequencies covering 300 plus materials of 1000MHz and 1000 plus materials of 2000MHz respectively, and completes the receiving and transmitting switching action through a circulator;
in a receiving state, after echo signals are subjected to 300-2000MHz broadband low noise amplification, a frequency mixing effect is completed by 2300-3000MHz or 6-7GHz high local oscillation signals, the obtained high and medium frequency signals are subjected to a filtering selection effect of a switch filtering group consisting of a 2GHz or 5GHz band-pass filter, then are mixed with 1600MHz or 4600MHz low local oscillation signals to generate 400MHz intermediate frequency signals, and sampling, extracting and filtering effects are completed by matching a low-speed ADC (analog to digital converter) meeting the band-pass sampling theorem with an FPGA (field programmable gate array), so that baseband signals of the echo signals are finally formed;
the FPGA mainly controls frequency control words, waveform control words and initial phase control words of the DDS in a transmitting state and extracts and filters echo signals in a receiving state to finally form baseband signals; in addition, the FPGA needs to complete communication with the array surface control unit, receive the frequency control word, the waveform control word, and the initial phase control word of the array surface control unit during transmission, and download the processed echo baseband signal during reception; the FPGA also needs to realize real-time control of a switch filtering group, a local oscillator frequency and a receiving and transmitting switch in the digital assembly;
the frequency range of 300-2000MHz (over five octaves) is divided into two frequency ranges (300-1000MHz and 1000-2000MHz) for frequency conversion processing respectively, and finally the low-speed ADC and the DAC realize waveform generation and echo sampling processing respectively, so that the difficulty of digital component preprocessing is reduced compared with a scheme of directly generating and sampling by adopting radio frequency; corresponding high and medium frequency signals are respectively selected in the frequency conversion process of two frequency ranges (300-1000MHz and 1000-2000MHz) to avoid in-band spurious introduced by frequency conversion, the frequency of the high and medium frequency signals can be flexibly changed according to the frequency of the signals during system design so as to achieve the purpose of no in-band low-order spurious, the module has the advantages of low cost, high integration level, flexible design and the like, and the engineering design of the ultra-wideband (300-2000MHz) digital transceiving module can be completed by combining an analog circuit, a low-speed ADC and a DAC.
Claims (1)
1. A 300-plus-2000 MHz wideband digital TR package, comprising:
the 300-plus-2000 MHz broadband digital TR component comprises a receiving link, a transmitting link and a local oscillator distribution circuit;
in the transmitting state, the FPGA generates a corresponding waveform signal with an intermediate frequency of 400MHz through a frequency control word, a waveform control word and an initial phase control word control DDS, generates a high and intermediate frequency signal with a frequency of 2000MHz or 5000MHz through a mixer and a low local oscillation signal with a frequency of 1600MHz or 4600MHz in a local oscillation distribution circuit, completes the mixing action with the high local oscillation signal with a frequency of 2300 plus 3000MHz or 6-7GHz in the local oscillation distribution circuit through the filtering selection action of a switch filtering group, generates transmitting signals with frequencies covering 300 plus 1000MHz and 1000 plus 2000MHz respectively, and completes the transceiving switching action through a circulator;
under the receiving state, after the echo signal is subjected to the low-noise amplification effect of a 300-2000MHz broadband, the frequency mixing effect is completed by a 2300-3000MHz or 6-7GHz high local oscillation signal, the obtained high and medium frequency signal is subjected to the filtering selection effect of a switch filtering group consisting of a 2GHz or 5GHz band-pass filter, then is mixed with a 1600MHz or 4600MHz low local oscillation signal to generate a 400MHz intermediate frequency signal, and the sampling, extracting and filtering effects are completed by matching a low-speed ADC (analog to digital converter) meeting the band-pass sampling theorem with an FPGA (field programmable gate array), so that a baseband signal of the echo signal is finally formed;
the FPGA completes the control of frequency control words, waveform control words and initial phase control words of the DDS in a transmitting state and the extraction and filtering of echo signals in a receiving state, and finally baseband signals are formed; in addition, the FPGA needs to complete communication with the array surface control unit, receive the frequency control word, the waveform control word, and the initial phase control word of the array surface control unit during transmission, and download the processed echo baseband signal during reception; the FPGA also needs to implement real-time control of the switch filtering set, the local oscillator frequency, and the transmit-receive switch in the digital component.
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| CN201911320303.0A CN110988810B (en) | 2019-12-19 | 2019-12-19 | 300-plus-2000 MHz broadband digital TR (transmitter-receiver) component |
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| CN201911320303.0A CN110988810B (en) | 2019-12-19 | 2019-12-19 | 300-plus-2000 MHz broadband digital TR (transmitter-receiver) component |
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| US5412414A (en) * | 1988-04-08 | 1995-05-02 | Martin Marietta Corporation | Self monitoring/calibrating phased array radar and an interchangeable, adjustable transmit/receive sub-assembly |
| CN207283544U (en) * | 2017-10-12 | 2018-04-27 | 成都九洲迪飞科技有限责任公司 | A kind of multi-path digital TR components |
| CN208046596U (en) * | 2018-04-09 | 2018-11-02 | 成都泰格微波技术股份有限公司 | A kind of transmission channel signal processing system for multi-channel digital TR components |
| CN108631809B (en) * | 2018-04-09 | 2021-08-20 | 成都泰格微电子研究所有限责任公司 | Multichannel digital TR assembly |
| CN108919270A (en) * | 2018-08-08 | 2018-11-30 | 中国航空工业集团公司雷华电子技术研究所 | A kind of single-emission and double-receiving CW with frequency modulation phased array radar system |
| CN209105177U (en) * | 2019-01-24 | 2019-07-12 | 陕西东方长岭电子技术有限公司 | A kind of number TR component |
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