CN110940969B - Digital T/R assembly for multi-beam DBF phased array system - Google Patents
Digital T/R assembly for multi-beam DBF phased array system Download PDFInfo
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- CN110940969B CN110940969B CN201911345581.1A CN201911345581A CN110940969B CN 110940969 B CN110940969 B CN 110940969B CN 201911345581 A CN201911345581 A CN 201911345581A CN 110940969 B CN110940969 B CN 110940969B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 239000000969 carrier Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 7
- 230000010355 oscillation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Classifications
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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
- 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
- G01S2013/0236—Special technical features
- G01S2013/0245—Radar with phased array antenna
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a digital T/R assembly for a multi-beam DBF phased array system, and belongs to the technical field of communication. The power divider comprises a power dividing circuit, a filter circuit, a radio frequency front end circuit and a plurality of frequency conversion circuits, wherein branch ports of the power dividing circuit are connected with the frequency conversion circuits in a one-to-one correspondence manner, a combining port of the power dividing circuit is connected with one input/output port of the filter circuit, the other input/output port of the filter circuit is connected with one port of the radio frequency front end circuit, and the other port of the radio frequency front end circuit is used for being connected with an antenna of a phased array system. The multi-target communication system can realize the receiving and transmitting of multi-path radio frequency carrier signals through a group of antennas, has the capability of multi-target communication, reduces the volume of equipment and improves the reliability of the whole system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a digital T/R assembly for a multi-beam DBF phased array system.
Background
In modern radar technology, the T/R component is an important component in a phased array radar system, and mainly completes the receiving and transmitting of radar signals. The traditional T/R component only carries out low-noise amplification output of a received signal and power amplification of a transmitted signal to an antenna port through a circulator, wherein the traditional T/R component does not comprise a frequency conversion function, does not comprise a frequency source, and has simpler and single circuit design.
With the rapid development of digital circuits, radar systems based on multi-beam DBF (Digital Beam Forming, digital beam synthesis) phased arrays have been used more widely with the advantages of higher reliability and system controllability. But the digital T/R component of the multi-beam DBF phased array system is also more complex, and the design of the system is more complicated due to the addition of the signal source and the frequency conversion function.
Disclosure of Invention
In view of the above, the present invention is directed to a digital T/R module for a multi-beam DBF phased array system, which can implement transmission and reception of multiple radio frequency carrier signals through a set of transceiver channels, and has the characteristics of high integration level, and can improve the reliability of the whole system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The digital T/R assembly for the multi-beam DBF phased array system comprises a power dividing circuit, a filter circuit, a radio frequency front end circuit and a plurality of frequency conversion circuits corresponding to different frequency bands, wherein the power dividing circuit is provided with a combining port and a plurality of branching ports, the branching ports are connected with the frequency conversion circuits in a one-to-one correspondence manner, the combining port is connected with one input and output port of the filter circuit, the other input and output port of the filter circuit is connected with one port of the radio frequency front end circuit, and the other port of the radio frequency front end circuit is used for being connected with an antenna of the phased array system;
when transmitting signals, the frequency conversion circuits respectively receive one path of intermediate frequency signals, convert the intermediate frequency signals into radio frequency signals and send the radio frequency signals to the power dividing circuit; the power dividing circuit combines the multiple paths of radio frequency signals into one path of signals and sends the signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the radio frequency front-end circuit; the radio frequency front-end circuit amplifies radio frequency signals carrying multiple paths of carriers and radiates the radio frequency signals to a free space through an antenna by a circulator;
when receiving signals, the radio frequency front-end circuit amplifies radio frequency signals with multiple paths of carriers received from free space after receiving the signals through a circulator and outputs the amplified radio frequency signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit performs equal power distribution on the multi-path carrier radio frequency signals and outputs the multi-path carrier radio frequency signals to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signals to corresponding intermediate frequency signals and outputs the corresponding intermediate frequency signals.
Compared with the background technology, the invention has the following advantages:
1. the invention comprises a plurality of frequency conversion circuits, which can up-convert a plurality of intermediate frequency signals with different frequencies to different radio frequency frequencies, and then realize the receiving and transmitting of a plurality of radio frequency carrier signals through a group of antennas through a radio frequency receiving and transmitting channel, thereby having the capability of multi-target communication.
2. The multipath frequency conversion circuit can respectively receive a local oscillation signal, and can realize the frequency hopping function by changing the local oscillation signal.
3. The invention realizes the structural form of transmitting and receiving signals by a group of receiving and transmitting channels of multipath radio frequency carrier signals, reduces the volume of equipment and increases the reliability of radar communication.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is another schematic block diagram of an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of fig. 2.
Detailed Description
The invention will be further described with reference to the drawings and detailed description.
As shown in fig. 1, a digital T/R module for a multi-beam DBF phased array system includes a power dividing circuit, a filter circuit, a radio frequency front end circuit, and a plurality of frequency conversion circuits corresponding to different frequency bands, where the power dividing circuit has a combining port and a plurality of branching ports, the branching ports are connected with the frequency conversion circuits in a one-to-one correspondence manner, the combining port is connected with one input/output port of the filter circuit, the other input/output port of the filter circuit is connected with one port of the radio frequency front end circuit, and the other port of the radio frequency front end circuit is used for being connected with an antenna of the phased array system.
When transmitting signals, the frequency conversion circuits respectively receive one path of intermediate frequency signals IF 1-IFn, convert the intermediate frequency signals into radio frequency signals and send the radio frequency signals to the power dividing circuit; the power dividing circuit combines the multiple paths of radio frequency signals into one path of signals and sends the signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the radio frequency front-end circuit; the radio frequency front-end circuit amplifies radio frequency signals carrying multiple paths of carriers and radiates the radio frequency signals to free space through the antenna by the circulator.
When receiving signals, the radio frequency front-end circuit amplifies radio frequency signals with multipath carriers RF 1-RFn received from free space after receiving the signals through a circulator and outputs the amplified signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit performs equal power distribution on the multi-path carrier radio frequency signals and outputs the multi-path carrier radio frequency signals to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signals to corresponding intermediate frequency signals and outputs the corresponding intermediate frequency signals.
Figures 2 and 3 show a more specific digital T/R assembly comprising two frequency conversion circuits. The circuit symbols in fig. 3 are all standard symbols, and the meaning thereof is well known to those skilled in the art, and will not be described herein.
Specifically, the low-frequency ports of the frequency conversion circuit 1 and the frequency conversion circuit 2 are respectively connected with intermediate-frequency signals IF1 and IF2 input from the outside, and the radio-frequency ports of the frequency conversion circuit 1 and the frequency conversion circuit 2 are connected with two branches of the power dividing circuit; the combining port of the power dividing circuit is connected with the input port of the filter circuit; the output port of the filter circuit is connected with a main crossing of a receiving and transmitting switch of the radio frequency front-end circuit; the circulator port of the radio frequency front-end circuit is connected with an external antenna.
In the above embodiment, the frequency conversion circuit 1 and the frequency conversion circuit 2 provide frequency conversion channels for two radio frequency signals with different frequencies and two intermediate frequency signals, respectively. The phased array system in which it is located operates in TDD mode. When the transmitting channel works, the T/R assembly up-converts two paths of intermediate frequency signals with different frequencies into two paths of radio frequency signals with different frequencies and different bandwidths. When the receiving channel works, the T/R assembly down-converts two paths of radio frequency signals with different frequencies to intermediate frequency signals with different frequencies.
The power dividing circuit and the filter circuit of the T/R component provide a combining channel for two paths of intermediate frequency signals, two radio frequency signals with different frequencies are combined into one path of radio frequency signal, and then the signals are filtered out of band interference through the filter circuit to form a broadband signal. Under the receiving condition, the radio frequency signals output two paths of broadband radio frequency signals through the filter circuit and the power dividing circuit and are respectively input to the two frequency conversion circuits.
The radio frequency front-end circuit of the T/R assembly provides a receiving low noise amplifying circuit and a transmitting power amplifying circuit for the whole T/R assembly respectively, and is used for transmitting radio frequency signals containing two carrier wave information to free space through a single antenna of one T/R assembly.
In addition, as shown in fig. 3, the mixers of the two frequency conversion circuits in the T/R assembly respectively receive a local oscillation signal LO1 and LO2, and by changing the local oscillation signals, the frequency hopping function can be realized.
The working principle of the above embodiment is as follows:
when the assembly works in a transmitting state, two paths of intermediate frequency signals with different frequencies, which are sent into the T/R assembly from the outside, respectively enter the frequency conversion circuit. In the frequency conversion circuit, the out-of-band interference of the sub-band is filtered by a filter, and then the out-of-band interference is sent to a frequency converter to be up-converted to radio frequency to form two paths of radio frequency signals. Then, the two paths of radio frequency signals are subjected to power synthesis through the power dividing circuit, and out-of-band interference is filtered through the filter circuit, so that a broadband radio frequency signal of two carriers is formed. Finally, in the radio frequency front-end circuit, the signal is amplified to a certain output level by a power amplifying circuit through a transmitting and receiving control change-over switch to be transmitted to a transmitting channel, and then the signal is output to an antenna through a circulator.
When the assembly works in a receiving state, the antenna receives radio frequency signals of two carrier signals at the same time, and the radio frequency signals are sent to a radio frequency front-end circuit through the circulator to be amplified with low noise. After the receiving and transmitting switch is switched to a receiving channel, the radio frequency carrier signal is output from the radio frequency front-end circuit, filtered out-of-band clutter by the filter circuit, shunted by the power dividing circuit and output to the two frequency conversion circuits. The frequency conversion circuit respectively down-converts the two paths of radio frequency signals into two paths of intermediate frequency signals with different frequencies, and then filters out and outputs the two paths of intermediate frequency signals through two different intermediate frequency filters.
In short, the invention realizes the transmission and the reception of signals through the same antenna by respectively converting multiple paths of different intermediate frequency signals to different radio frequency carriers and then combining multiple carriers. The T/R component can be applied to a multi-beam DBF phased array system, and can simultaneously transmit and receive radio frequency signals with different carrier waves and different signal bandwidths, so that the matrix type of the phased array system is more efficient, and a channel transmission mode of multi-target communication can be realized.
Claims (1)
1. A digital T/R assembly for a multi-beam DBF phased array system, characterized by: the power division circuit is provided with a combining port and a plurality of branching ports, the branching ports are connected with the frequency conversion circuit in a one-to-one correspondence manner, the combining port is connected with one input/output port of the filter circuit, the other input/output port of the filter circuit is connected with one port of the radio frequency front end circuit, and the other port of the radio frequency front end circuit is used for being connected with an antenna of a phased array system;
when transmitting signals, the frequency conversion circuits respectively receive one path of intermediate frequency signals, convert the intermediate frequency signals into radio frequency signals and send the radio frequency signals to the power dividing circuit; the power dividing circuit combines the multiple paths of radio frequency signals into one path of signals and sends the signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the radio frequency front-end circuit; the radio frequency front-end circuit amplifies radio frequency signals carrying multiple paths of carriers and radiates the radio frequency signals to a free space through an antenna by a circulator;
When receiving signals, the radio frequency front-end circuit amplifies radio frequency signals with multiple paths of carriers received from free space after receiving the signals through a circulator and outputs the amplified radio frequency signals to the filter circuit; the filtering circuit filters out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit performs equal power distribution on the multi-path carrier radio frequency signals and outputs the multi-path carrier radio frequency signals to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signals to corresponding intermediate frequency signals and outputs the corresponding intermediate frequency signals;
the low-frequency port of the frequency conversion circuit is respectively connected with an intermediate frequency signal input from the outside, and the radio frequency port of the frequency conversion circuit is connected with two branches of the power dividing circuit; the combining port of the power dividing circuit is connected with the input port of the filter circuit; the output port of the filter circuit is connected with a main crossing of a receiving and transmitting switch of the radio frequency front-end circuit; the circulator port of the radio frequency front-end circuit is connected with an external antenna;
The frequency conversion circuit provides frequency conversion channels for radio frequency signals and intermediate frequency signals with different frequencies, a phased array system where the frequency conversion circuit is positioned works in a TDD mode, and when the transmitting channel works, the T/R assembly up-converts the intermediate frequency signals with different frequencies to radio frequency signals with different frequencies and different bandwidths; when the receiving channel works, the T/R component down-converts radio frequency signals with different frequencies to intermediate frequency signals with different frequencies;
The power dividing circuit and the filter circuit provide a combining channel for the intermediate frequency signals, combine the radio frequency signals with different frequencies into a path of radio frequency signal, and then filter out-of-band interference of the signal through the filter circuit to form a broadband signal; under the receiving condition, the radio frequency signal outputs a broadband radio frequency signal through the filter circuit and the power dividing circuit and is respectively input to each frequency conversion circuit;
the radio frequency front-end circuit provides a receive low noise amplification and transmit power amplification circuit for the entire T/R assembly, respectively, and is configured to transmit radio frequency signals containing carrier information to free space through a single antenna of one of the T/R assemblies.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911345581.1A CN110940969B (en) | 2019-12-24 | 2019-12-24 | Digital T/R assembly for multi-beam DBF phased array system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911345581.1A CN110940969B (en) | 2019-12-24 | 2019-12-24 | Digital T/R assembly for multi-beam DBF phased array system |
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| CN110940969A CN110940969A (en) | 2020-03-31 |
| CN110940969B true CN110940969B (en) | 2024-11-08 |
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| WO2022182869A1 (en) | 2021-02-24 | 2022-09-01 | Bluehalo Llc | System and method for a digitally beamformed phased array feed |
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| CN211402716U (en) * | 2019-12-24 | 2020-09-01 | 中国电子科技集团公司第五十四研究所 | Digital T/R assembly for multi-beam DBF phased array system |
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| US9411039B2 (en) * | 2011-01-21 | 2016-08-09 | Freescale Semiconductor, Inc. | Phased-array receiver, radar system and vehicle |
| CN103401072B (en) * | 2013-07-25 | 2015-07-08 | 上海交通大学 | Periodic amplitude control-based phased-array antenna system and wave beam control method |
| CN108254722B (en) * | 2017-12-25 | 2021-04-27 | 广东纳睿雷达科技股份有限公司 | Dual-frequency phased array radar system and implementation method thereof |
| CN108919246A (en) * | 2018-07-12 | 2018-11-30 | 中国船舶重工集团公司第七二四研究所 | A kind of design method of ultra wide band single-conversion multi-channel digital receiving unit |
| CN109407092B (en) * | 2018-12-11 | 2024-05-14 | 东南大学 | Imaging radar device and imaging method |
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| CN211402716U (en) * | 2019-12-24 | 2020-09-01 | 中国电子科技集团公司第五十四研究所 | Digital T/R assembly for multi-beam DBF phased array system |
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