CN110940969A - 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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- CN110940969A CN110940969A CN201911345581.1A CN201911345581A CN110940969A CN 110940969 A CN110940969 A CN 110940969A CN 201911345581 A CN201911345581 A CN 201911345581A CN 110940969 A CN110940969 A CN 110940969A
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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)
Abstract
The invention discloses a digital T/R component 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 the dividing ports of the power dividing circuit are connected with the frequency conversion circuits in a one-to-one correspondence mode, the 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-channel radio frequency carrier receiving and transmitting system can receive and transmit multi-channel radio frequency carrier signals through a group of antennas, has the capability of multi-target communication, reduces the volume of equipment and improves the overall reliability of the system.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a digital T/R component for a multi-beam DBF phased array system.
Background
In modern radar technology, a T/R component is used as an important part in a phased array radar system and mainly used for receiving and transmitting radar signals. The traditional T/R component only performs low-noise amplification output of a received signal and power amplification of a transmitted signal, and the power amplification is transmitted to an antenna port through a circulator, wherein the traditional T/R component does not comprise a frequency conversion function and does not have a frequency source, and the circuit design is simpler and more single.
With the high-speed development of Digital circuits, a radar system based on a multi-Beam DBF (Digital Beam Forming) phased array is more widely applied due to the advantages of higher reliability, system controllability and the like. However, the digital T/R components of the multi-beam DBF phased array system are also more complex, and the design of the system is more complicated due to the addition of a signal source and a frequency conversion function.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a digital T/R component for a multi-beam DBF phased array system, which can transmit and receive multiple radio frequency carrier signals through a set of transceiving channels, has the characteristic of high integration level, and can improve the reliability of the whole system.
In order to achieve the purpose, the invention adopts the technical scheme that:
a digital T/R component for a 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 shunting ports, the shunting ports are connected with the frequency conversion circuits in a one-to-one correspondence mode, 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, convert the intermediate frequency signals into radio frequency signals and send the radio frequency signals to the power division circuit; the power dividing circuit combines multiple paths of radio frequency signals into one path of signal and sends the signal to the filter circuit; the filter circuit filters out-of-band spurious signals in the signals and sends the processed signals to the radio frequency front-end circuit; the radio frequency front-end circuit amplifies a radio frequency signal carrying multiple paths of carriers and radiates the radio frequency signal to a free space through an antenna by a circulator;
when receiving signals, the radio frequency front-end circuit receives radio frequency signals with multiple paths of carriers from a free space, amplifies the radio frequency signals after the radio frequency signals are received by a circulator, and outputs the radio frequency signals to the filter circuit; the filter circuit filters out the out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit distributes equal power to the multi-channel carrier radio frequency signals and outputs the equal power to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signal into a corresponding intermediate frequency signal and outputs the intermediate frequency signal.
Compared with the background technology, the invention has the following advantages:
1. the multi-channel radio frequency carrier receiving and transmitting device comprises a plurality of frequency conversion circuits, can up-convert multi-channel intermediate frequency signals with different frequencies to different radio frequency frequencies, then realizes the receiving and transmitting of the multi-channel radio frequency carrier signals through a group of antennas through a radio frequency receiving and transmitting channel, and has the capability of multi-target communication.
2. The multi-channel frequency conversion circuit can respectively receive a local oscillator signal, and the frequency hopping function can be realized by changing the local oscillator signal.
3. The invention realizes the structural form that the multi-channel radio frequency carrier signals transmit and receive signals through a group of transceiving channels, 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 diagram of the circuit of fig. 2.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a digital T/R component 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 splitting ports, the splitting ports are connected to the frequency conversion circuits in a one-to-one correspondence manner, the combining port is connected to one input/output port of the filter circuit, another input/output port of the filter circuit is connected to one port of the radio frequency front-end circuit, and another port of the radio frequency front-end circuit is used for being connected to 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 division circuit; the power dividing circuit combines multiple paths of radio frequency signals into one path of signal and sends the signal to the filter circuit; the filter circuit filters out-of-band spurious signals in the signals and sends the processed signals 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 an antenna through a circulator.
When receiving signals, the radio frequency front-end circuit receives radio frequency signals with multiple paths of carrier waves RF 1-RFn from free space, amplifies the radio frequency signals after the radio frequency signals are received by a circulator and outputs the radio frequency signals to the filter circuit; the filter circuit filters out the out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit distributes equal power to the multi-channel carrier radio frequency signals and outputs the equal power to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signal into a corresponding intermediate frequency signal and outputs the intermediate frequency signal.
A more specific digital T/R assembly is shown in fig. 2 and 3, which includes two frequency conversion circuits. The circuit symbols in fig. 3 are standard symbols, and the meaning thereof is well known to those skilled in the art, and will not be described herein.
Specifically, 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 outside, and radio-frequency ports of the frequency conversion circuit 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 the main port of the receiving and transmitting switch of the radio frequency front-end circuit; and a 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 paths of radio frequency signals with different frequencies and two paths of 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 component 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 component 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 signal is filtered by the filter circuit to remove out-of-band interference to form a broadband signal. Under the condition of receiving, the radio frequency signal passes through the filter circuit and the power dividing circuit to output two paths of broadband radio frequency signals, and the two paths of broadband radio frequency signals are respectively input to the two frequency conversion circuits.
The RF front-end circuit of the T/R component provides a receiving low-noise amplification circuit and a transmitting power amplification circuit for the whole T/R component respectively, and is used for transmitting the RF signal containing two kinds of carrier information to a free space through a single antenna of the T/R component.
In addition, as shown in fig. 3, the mixers of two frequency conversion circuits in the T/R module receive one local oscillation signal LO1 and LO2, respectively, and the frequency hopping function can be realized by changing the local oscillation signals.
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 enter the frequency conversion circuit respectively. In the frequency conversion circuit, out-of-band interference of a sub-band is filtered by a filter, and then the frequency is sent to a frequency converter to be up-converted to radio frequency so as to form two paths of radio frequency signals. Then, the two paths of radio frequency signals are subjected to power synthesis through a power dividing circuit, and then the out-of-band interference is filtered through a filter circuit to form a broadband radio frequency signal with two carriers. Finally, in the radio frequency front-end circuit, the transmitting channel is opened through a receiving and transmitting control switch, the signal is amplified to a certain output level through a power amplifying circuit and then is output to an antenna through a circulator.
When the module 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 a circulator to be subjected to low noise amplification. After the receiving and sending switch is switched to a receiving channel, the radio frequency carrier signal is output from the radio frequency front-end circuit, the out-of-band clutter is filtered by the filter circuit, and the out-of-band clutter is 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 to two paths of intermediate frequency signals with different frequencies, and the two paths of intermediate frequency signals are filtered and output by two different intermediate frequency filters.
In short, the invention realizes the transmission and the reception of signals through the same antenna by respectively converting a plurality of paths of different intermediate frequency signals to different radio frequency carriers and then combining a plurality of 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 of various different carriers 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, comprising: the power dividing circuit is provided with a combining port and a plurality of shunting ports, the shunting ports are connected with the frequency conversion circuits in a one-to-one correspondence mode, 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 division circuit; the power dividing circuit combines multiple paths of radio frequency signals into one path of signal and sends the signal to the filter circuit; the filter circuit filters out-of-band spurious signals in the signals and sends the processed signals to the radio frequency front-end circuit; the radio frequency front-end circuit amplifies a radio frequency signal carrying multiple paths of carriers and radiates the radio frequency signal to a free space through an antenna by a circulator;
when receiving signals, the radio frequency front-end circuit receives radio frequency signals with multiple paths of carriers from a free space, amplifies the radio frequency signals after the radio frequency signals are received by a circulator, and outputs the radio frequency signals to the filter circuit; the filter circuit filters out the out-of-band spurious in the signal and sends the processed signal to the power dividing circuit; the power dividing circuit distributes equal power to the multi-channel carrier radio frequency signals and outputs the equal power to the corresponding frequency conversion circuits respectively; each frequency conversion circuit converts the received radio frequency signal into a corresponding intermediate frequency signal and outputs the intermediate frequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911345581.1A CN110940969A (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 |
|---|---|---|---|
| CN201911345581.1A CN110940969A (en) | 2019-12-24 | 2019-12-24 | Digital T/R assembly for multi-beam DBF phased array system |
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| CN110940969A true CN110940969A (en) | 2020-03-31 |
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| CN201911345581.1A Pending CN110940969A (en) | 2019-12-24 | 2019-12-24 | Digital T/R assembly for multi-beam DBF phased array system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220271431A1 (en) * | 2021-02-24 | 2022-08-25 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
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2019
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220271431A1 (en) * | 2021-02-24 | 2022-08-25 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11664594B2 (en) | 2021-02-24 | 2023-05-30 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11670855B2 (en) | 2021-02-24 | 2023-06-06 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11695209B2 (en) | 2021-02-24 | 2023-07-04 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11721900B2 (en) | 2021-02-24 | 2023-08-08 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11742579B2 (en) | 2021-02-24 | 2023-08-29 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11742578B2 (en) | 2021-02-24 | 2023-08-29 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11777215B2 (en) | 2021-02-24 | 2023-10-03 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11784412B2 (en) | 2021-02-24 | 2023-10-10 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11791557B2 (en) | 2021-02-24 | 2023-10-17 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11817636B2 (en) | 2021-02-24 | 2023-11-14 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11824279B2 (en) | 2021-02-24 | 2023-11-21 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11824280B2 (en) | 2021-02-24 | 2023-11-21 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11843188B2 (en) | 2021-02-24 | 2023-12-12 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11955727B2 (en) | 2021-02-24 | 2024-04-09 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US11996634B2 (en) | 2021-02-24 | 2024-05-28 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US12009606B2 (en) | 2021-02-24 | 2024-06-11 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US12021317B2 (en) | 2021-02-24 | 2024-06-25 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
| US12034228B2 (en) | 2021-02-24 | 2024-07-09 | Bluehalo, Llc | System and method for a digitally beamformed phased array feed |
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