CN111323758B - Multifunctional frequency conversion assembly for radar and countermeasure dual-mode duplex - Google Patents
Multifunctional frequency conversion assembly for radar and countermeasure dual-mode duplex Download PDFInfo
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- CN111323758B CN111323758B CN201911387030.1A CN201911387030A CN111323758B CN 111323758 B CN111323758 B CN 111323758B CN 201911387030 A CN201911387030 A CN 201911387030A CN 111323758 B CN111323758 B CN 111323758B
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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
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Radar, Positioning & Navigation (AREA)
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- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar and countermeasure dual-mode duplex multifunctional variable frequency component. The frequency conversion assembly comprises a delay circuit, a switch matrix, a down-conversion circuit and a transmitting driving circuit; in a receiving state working mode, a radio frequency signal is input by a delay circuit, is transmitted to a down-conversion circuit by a switch matrix after numerical control delay and gain compensation, and outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal; in a working mode in a transmitting state, a radio frequency signal is input by a transmitting driving circuit, is transmitted to a delay circuit by a switch matrix after numerical control phase shifting, driving and amplifying, and then outputs a transmitting intermediate frequency signal after numerical control delay and gain compensation; in the self-checking state working mode, the radio frequency signal is input by a transmitting driving circuit, is transmitted to a down-conversion circuit by a switch matrix after being digitally phase-shifted, driven and amplified, and outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal. The invention has simple structure and high integration level, has three functions of receiving, transmitting and self-checking, and improves the universality and the utilization efficiency of the components.
Description
Technical Field
The invention relates to the technical field of radars and countermeasures, in particular to a multifunctional variable frequency assembly for dual-mode duplex of a radar and a countermeasure.
Background
The frequency conversion component can convert the high-frequency signal of the radio frequency front end into an intermediate-frequency signal which can be processed by the rear-end digital receiver, or convert the digital baseband signal into the radio frequency signal and transmit the radio frequency signal to the radio frequency front end for transmission, so that the frequency conversion component is a key device in a radar and countermeasure system. Along with the increasing demands of integration, miniaturization and multifunction of microwave systems, the demands of universalization and miniaturization of frequency conversion components are also increasing gradually. The radar system and the electronic countermeasure system have larger difference in requirements for intermediate frequency signals, and are characterized by the following points: (1) The bandwidth difference is that the working bandwidth of the radar system is narrow and far smaller than the bandwidth of the electronic countermeasure system; (2) The central frequency point difference, the radar intermediate frequency is lower than the electronic countermeasure system intermediate frequency; (3) The gain difference, the intermediate frequency gain and the dynamic range of the radar system are higher than those of the electronic countermeasure system.
Due to the inconsistency of the radar and electronic countermeasure system to the requirement of the intermediate frequency signal, the frequency conversion assembly supporting the radar and the countermeasure system at present has the following problems: (1) The time-sharing working mode is adopted, and channel gain bandwidth and the like are adjusted according to specific requirements, so that the duplex is not provided; (2) The two independent frequency conversion channels are adopted, so that the complete frequency conversion function is realized, and the complexity of the assembly is high.
Disclosure of Invention
The invention aims to provide a multifunctional variable frequency component of a radar with a simple circuit structure and an countermeasure dual-mode duplex, which realizes the function of outputting intermediate frequency of two modes simultaneously.
The technical solution for realizing the purpose of the invention is as follows: a radar and countermeasure dual-mode duplex multifunctional frequency conversion assembly comprises a delay circuit, a down-conversion circuit, a transmitting drive circuit and a switch matrix;
the delay circuit is used for carrying out signal delay and gain compensation;
the down-conversion circuit is used for down-converting the radio frequency signals from the switch matrix and outputting radar intermediate frequency signals and electronic countermeasure intermediate frequency signals;
the emission driving circuit is used for carrying out numerical control phase shifting and driving amplification treatment on external excitation signals;
and the switch matrix controls the on-off state of each port according to the working state of the component.
Further, the multifunctional frequency conversion assembly comprises three working states of receiving, transmitting and self-checking:
in a receiving state working mode, a radio frequency signal RF1 is input by a delay circuit, is transmitted to a down-conversion circuit by a switch matrix after numerical control delay and gain compensation, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal;
in a transmitting state working mode, a radio frequency signal RF2 is input by a transmitting driving circuit, is transmitted to a delay circuit by a switch matrix after numerical control phase shifting and driving amplification, and then outputs a transmitting intermediate frequency signal after numerical control delay and gain compensation;
in the self-checking state working mode, a radio frequency signal RF2 is input by a transmitting driving circuit, is transmitted to a down-conversion circuit by a switch matrix after numerical control phase shifting, driving and amplifying, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal.
The delay circuit comprises a first bidirectional amplifier, a first delayer, a second bidirectional amplifier, a second delayer and a third signal amplifier which are sequentially connected, and is used for delaying and compensating gain of a received signal in a receiving state working mode, transmitting the delayed and gain compensated received signal to the switch matrix, and converting the delayed and compensated received signal into an intermediate frequency signal through the down-conversion circuit and outputting the intermediate frequency signal; in the working mode of the transmitting state, the radio frequency signals from the switch matrix are output to transmit intermediate frequency signals after numerical control delay and gain compensation.
Further, the down-conversion circuit comprises an electronic countermeasure down-conversion circuit, a power divider and a radar down-conversion circuit; the down-conversion circuit receives the radio frequency signals from the switch matrix, the radio frequency signals are firstly converted into intermediate frequency signals IF through the electronic countermeasure down-conversion circuit, then are divided into two paths through the power divider, one path serves as the electronic countermeasure intermediate frequency signals IF_EW to be directly output, and the other path serves as the Radar intermediate frequency signals IF_Radar to be output through the Radar down-conversion circuit.
Further, the emission driving circuit comprises an equalizer, an amplifier and a phase shifter which are sequentially connected, receives an external excitation signal, and performs numerical control phase shifting and driving amplification processing.
Further, the switch matrix comprises a first radio frequency switch, a second radio frequency switch, a third radio frequency switch and a fixed attenuator, wherein the first radio frequency switch, the second radio frequency switch and the third radio frequency switch are respectively connected with a delay circuit, a down-conversion circuit and a transmission driving circuit;
the switch matrix controls the interconnection state among the ports according to different working states:
in a receiving state working mode, a port 1 of the first radio frequency switch is communicated with a port 2 of the third radio frequency switch, and a radio frequency signal RF3 from the delay circuit is transmitted to the down-conversion circuit as a radio frequency signal RF5 after passing through the first radio frequency switch and the third radio frequency switch, so that a receiving function is realized;
in a self-checking state working mode, a port No. 2 of the second radio frequency switch is communicated with a port No. 1 of the third radio frequency switch, and a radio frequency signal RF4 from the transmitting driving circuit is transmitted to the down-conversion circuit as a radio frequency signal RF5 after passing through the second radio frequency switch and the third radio frequency switch, so that a self-checking function is realized;
in the working mode of the transmitting state, the port No. 2 of the first radio frequency switch is communicated with the port No. 1 of the second radio frequency switch, and the radio frequency signal RF4 from the transmitting driving circuit is transmitted to the delay circuit as the radio frequency signal RF3 after passing through the second radio frequency switch, the fixed attenuator and the first radio frequency switch, so that the transmitting function is realized.
Compared with the prior art, the invention has the remarkable advantages that: (1) dual mode duplexing: the down-conversion component can be simultaneously (duplex) applied to a radar system and an electronic countermeasure system (double modes), has the index equivalent to that of a frequency conversion component of a discrete frequency conversion channel, and simultaneously reduces the complexity of a microwave complete machine system; (2) integrated multifunctional: the three functions of receiving, transmitting and self-checking are integrated by utilizing the switch matrix in the assembly, so that the universality and the utilization efficiency of the assembly are improved; (3) simple structure: the radar down-conversion circuit multiplexes the electronic countermeasure down-conversion circuit, the self-checking working state multiplexes the emission drive circuit, finally improves the utilization rate of the internal circuit, reduces the complexity of the components and reduces the size of the components.
Drawings
FIG. 1 is a block diagram of a radar and countermeasure dual-mode duplex multi-functional frequency conversion assembly of the present invention.
Fig. 2 is a block diagram of the structure of the delay circuit in the present invention.
Fig. 3 is a block diagram of the down-conversion circuit in the present invention.
Fig. 4 is a block diagram of the structure of the emission driving circuit in the present invention.
Fig. 5 is a block diagram showing the structure of a switch matrix circuit according to the present invention.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
Referring to fig. 1, the multifunctional frequency conversion assembly for radar and countermeasure dual-mode duplexing of the present invention includes a delay circuit 1, a down-conversion circuit 2, a transmitting driving circuit 3 and a switch matrix 4;
the delay circuit 1 is used for carrying out signal delay and gain compensation;
a down-conversion circuit 2 for down-converting the radio frequency signal from the switch matrix 4 to output a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal;
the emission driving circuit 3 is used for carrying out numerical control phase shifting and driving amplification treatment on external excitation signals;
the switch matrix 4 controls the on-off state of each port according to the working state of the component.
A radar and countermeasure dual-mode duplex multifunctional variable frequency component comprises three working states of receiving, transmitting and self-checking;
in a receiving state working mode, a radio frequency signal RF1 is input by a delay circuit 1, is transmitted to a down-conversion circuit 2 by a switch matrix 4 after numerical control delay and gain compensation, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal;
in a transmitting state working mode, a radio frequency signal RF2 is input by a transmitting driving circuit 3, is transmitted to a delay circuit 1 by a switch matrix 4 after being subjected to numerical control phase shifting, driving and amplifying, and is output to transmit an intermediate frequency signal after being subjected to numerical control delay and gain compensation;
in the self-checking state working mode, a radio frequency signal RF2 is input by a transmitting driving circuit 3, is transmitted to a down-conversion circuit 2 by a switch matrix 4 after numerical control phase shifting, driving and amplifying, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal.
Further, the delay circuit 1 is a two-port circuit, one end is an external radio frequency interface, the other end is connected with the front end component in a butt joint manner, and the other end is connected with the switch matrix 4 in a butt joint manner. The circuit completes signal delay and gain compensation functions, is composed of a first bidirectional amplifier (U1), a first delayer (D1), a second bidirectional amplifier (U2), a second delayer (D2) and a third signal amplifier (U3) which are sequentially connected, and has reciprocity characteristics. The delay devices have larger insertion loss, and each delay device is connected with a bidirectional amplifier in front and back to be symmetrically distributed, so as to reduce the noise coefficient of the circuit and prevent the signal to noise ratio from deteriorating greatly, as shown in fig. 2. In the receiving state working mode, the external radio frequency signal RF1 is amplified and delayed and then converted into RF3 to be transmitted to the switch matrix 4; in the transmitting state working mode, the radio frequency signal RF3 from the switch matrix 4 is output RF1 after numerical control delay and driving amplification.
Further, the down-conversion circuit 2 down-converts the radio frequency signal RF5 from the switch matrix 4, and outputs two paths of intermediate frequency signals if_ew (Radar intermediate frequency signal, wideband, high frequency) and if_radar (electronic countermeasure intermediate frequency signal, narrowband, low frequency). In order to simplify the frequency conversion circuit and realize the function of dual-mode duplexing, the radar down-conversion circuit multiplexes the electronic countermeasure down-conversion circuit, as shown in fig. 3. The electronic countermeasure down-conversion circuit consists of a preselect filter bank (filtering false intermediate frequency and image signals), a front-stage amplifier (reducing noise coefficient), a numerical control attenuator (expanding dynamic range) and a mixing filter (one-stage or multi-stage mixing according to the requirement). The RF5 is converted into an intermediate frequency signal IF after passing through an electronic countermeasure down-conversion circuit, and then is divided into two paths by a power divider U7, one path is used as the output of the electronic countermeasure intermediate frequency IF_EW, and the other path is used as the output of the Radar intermediate frequency IF_Radar after the down-conversion, filtering, amplifying and numerical control attenuation.
Further, as shown in fig. 4, the transmission driving circuit 3 outputs the radio frequency RF4 to the switch matrix 4 after amplifying, equalizing and phase-shifting the input signal which is the external excitation signal RF 2. The transmit driver circuit includes an equalizer U4, an amplifier U5, and a phase shifter U6. The equalizer U4 has the function of carrying out amplitude equalization on the broadband signal and ensuring the flatness of the output signal; the amplifier U5 amplifies the radio frequency signal to prevent the signal to noise ratio from deteriorating; the phase shifter U6 shifts the phase of the radio frequency signal, and ensures the phase consistency among a plurality of components.
Further, as shown in fig. 5, the switch matrix 4 includes a first rf switch S1, a second rf switch S2, a third rf switch S3, and a fixed attenuator U8, which are three-port circuits, and are respectively connected to the delay circuit 1, the down-conversion circuit 2, and the emission driving circuit 3. The switch matrix 4 controls the interconnection state among the ports according to different working states:
in a receiving state working mode, a port 1 of the first radio frequency switch S1 is conducted with a port 2 of the third radio frequency switch S3, and a radio frequency signal RF3 from the delay circuit 1 is transmitted to the down-conversion circuit 2 as a radio frequency signal RF5 after passing through the first radio frequency switch S1 and the third radio frequency switch S3, so that a receiving function is realized;
in the self-checking state working mode, the port No. 2 of the second radio frequency switch S2 is communicated with the port No. 1 of the third radio frequency switch S3, and the radio frequency signal RF4 from the transmitting driving circuit 3 is transmitted to the down-conversion circuit 2 as a radio frequency signal RF5 after passing through the second radio frequency switch S2 and the third radio frequency switch S3, so that the self-checking function is realized;
in the working mode of the transmitting state, the port No. 2 of the first radio frequency switch S1 is conducted with the port No. 1 of the second radio frequency switch S2, and the radio frequency signal RF4 from the transmitting driving circuit 3 is transmitted to the delay circuit 1 as the radio frequency signal RF3 after passing through the second radio frequency switch S2, the fixed attenuator U8 and the first radio frequency switch S1, so that the transmitting driving function is realized.
The down-conversion component can be simultaneously (duplex) applied to a radar system and an electronic countermeasure system (double modes), has the same index as the frequency conversion component of a discrete frequency conversion channel, and simultaneously reduces the complexity of a microwave complete machine system; the three functions of receiving, transmitting and self-checking are integrated by utilizing the switch matrix in the assembly, so that the universality and the utilization efficiency of the assembly are improved; the radar down-conversion circuit multiplexes the electronic countermeasure down-conversion circuit, the self-checking working state multiplexes the emission drive circuit, finally improves the utilization rate of the internal circuit, reduces the complexity of the components and reduces the size of the components.
Claims (5)
1. The multifunctional frequency conversion assembly for radar and countermeasure dual-mode duplexing is characterized by comprising a delay circuit (1), a down-conversion circuit (2), a transmitting driving circuit (3) and a switch matrix (4);
the delay circuit (1) is used for carrying out signal delay and gain compensation;
a down-conversion circuit (2) for down-converting the radio frequency signal from the switch matrix (4) to output a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal;
the emission driving circuit (3) is used for carrying out numerical control phase shifting and driving amplification treatment on an external excitation signal;
the switch matrix (4) controls the on-off state of each port according to the working state of the component;
the switch matrix (4) comprises a first radio frequency switch (S1), a second radio frequency switch (S2), a third radio frequency switch (S3) and a fixed attenuator (U8), wherein the first radio frequency switch (S1), the second radio frequency switch (S2) and the third radio frequency switch (S3) are respectively connected with a delay circuit (1), a transmitting driving circuit (3) and a down-conversion circuit (2);
the switch matrix (4) controls the interconnection state among the ports according to different working states:
in a receiving state working mode, a port 1 of the first radio frequency switch (S1) is communicated with a port 2 of the third radio frequency switch (S3), and a radio frequency signal RF3 from the delay circuit (1) is transmitted to the down-conversion circuit (2) as a radio frequency signal RF5 after passing through the first radio frequency switch (S1) and the third radio frequency switch (S3), so that a receiving function is realized;
in a self-checking state working mode, a No. 2 port of the second radio frequency switch (S2) is communicated with a No. 1 port of the third radio frequency switch (S3), and a radio frequency signal RF4 from the transmitting driving circuit (3) is transmitted to the down-conversion circuit (2) as a radio frequency signal RF5 after passing through the second radio frequency switch (S2) and the third radio frequency switch (S3), so that a self-checking function is realized;
in a transmission state working mode, a No. 2 port of the first radio frequency switch (S1) is communicated with a No. 1 port of the second radio frequency switch (S2), and a radio frequency signal RF4 from the transmission driving circuit (3) is transmitted to the delay circuit (1) as a radio frequency signal RF3 after passing through the second radio frequency switch (S2), the fixed attenuator (U8) and the first radio frequency switch (S1), so that a transmission function is realized.
2. The radar and countermeasure dual-mode duplex multifunctional frequency conversion assembly according to claim 1, wherein the multifunctional frequency conversion assembly comprises three working states of receiving, transmitting and self-checking:
in a receiving state working mode, a radio frequency signal RF1 is input by a delay circuit (1), is transmitted to a down-conversion circuit (2) by a switch matrix (4) after numerical control delay and gain compensation, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal;
under the working mode of a transmitting state, a radio frequency signal RF2 is input by a transmitting driving circuit (3), is transmitted to a delay circuit (1) by a switch matrix (4) after numerical control phase shifting, driving and amplifying, and then outputs a transmitting intermediate frequency signal after numerical control delay and gain compensation;
under the working mode of the self-checking state, a radio frequency signal RF2 is input by a transmitting driving circuit (3), is transmitted to a down-conversion circuit (2) by a switch matrix (4) after numerical control phase shifting, driving and amplifying, and simultaneously outputs a radar intermediate frequency signal and an electronic countermeasure intermediate frequency signal.
3. The radar and countermeasure dual-mode duplex multifunctional frequency conversion assembly according to claim 1 or 2, wherein the delay circuit (1) comprises a first bidirectional amplifier (U1), a first delayer (D1), a second bidirectional amplifier (U2), a second delayer (D2) and a third signal amplifier (U3) which are sequentially connected, and in a receiving state working mode, the received signal is transmitted to the switch matrix (4) after delay and gain compensation, and then is converted into an intermediate frequency signal by the down-conversion circuit (2) and then is output; in the working mode of the transmitting state, the radio frequency signal from the switch matrix (4) is output to transmit an intermediate frequency signal after numerical control delay and gain compensation.
4. The radar and countermeasure dual duplex multifunctional frequency conversion assembly according to claim 1 or 2, wherein the down conversion circuit (2) comprises an electronic countermeasure down conversion circuit, a power divider (U7) and a radar down conversion circuit; the down-conversion circuit (2) receives radio frequency signals from the switch matrix (4), the radio frequency signals are firstly converted into intermediate frequency signals IF through the electronic countermeasure down-conversion circuit, then are divided into two paths through the power divider (U7), one path serves as the electronic countermeasure intermediate frequency signals IF_EW to be directly output, and the other path serves as the Radar intermediate frequency signals IF_Radar to be output through the Radar down-conversion circuit.
5. The radar and countermeasure dual-mode duplex multifunctional frequency conversion assembly according to claim 1 or 2, wherein the transmission driving circuit (3) comprises an equalizer (U4), an amplifier (U5) and a phase shifter (U6) which are sequentially connected, receives an external excitation signal, and performs digital control phase shifting and driving amplification processing.
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| CN201911387030.1A CN111323758B (en) | 2019-12-30 | 2019-12-30 | Multifunctional frequency conversion assembly for radar and countermeasure dual-mode duplex |
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| CN102932021A (en) * | 2012-10-10 | 2013-02-13 | 中兴通讯股份有限公司 | Down-conversion device, down-conversion implementation method and receiver |
| CN204408339U (en) * | 2015-02-16 | 2015-06-17 | 公安部沈阳消防研究所 | A kind of two-way frequency-converter power amplifier |
| JP6645369B2 (en) * | 2016-07-06 | 2020-02-14 | 富士通株式会社 | Wireless communication system and base station |
| CN205945652U (en) * | 2016-08-25 | 2017-02-08 | 成都益为创科技有限公司 | Distributing type converter |
| CN108574496A (en) * | 2017-03-08 | 2018-09-25 | 深圳市脉冲星通信科技有限公司 | Track communication base station antenna system |
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