S-band 48-channel tiled integrated digital receive assembly

Abstract

The application provides an S-band 48-channel tile-integrated digital receiving assembly, which comprises a shell, a radio frequency input interface, a radio frequency filter front-end module arranged in the shell in a tile-laminated mode, an internal interconnection interface, a frequency conversion module and a medium frequency output interface arranged on the lower surface of the shell. The application integrates the originally independent passive cavity filter, radio frequency front-end, frequency conversion assembly, calibration and local oscillator power division network and DBF signal transfer plate and other components into one through a microwave multilayer composite substrate, improves the functional density and shortens the interconnection length between the antenna, active assembly and DBF processing. The application solves the problems of tight internal space, complex electromagnetic compatibility and harsh structure weight requirement of a large array surface, has the technical characteristics of high channel consistency, miniaturized multi-channel, zero debugging, low cost and easy batch production. The assembly has a compact structure and can be used as a standard module, so that the large DBF phased array system is flexible and has strong reconfigurability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric communication technology, in particular to a S-band 48-channel tile type integrated digital receiving assembly. BACKGROUND

[0002] The multi-beam TT&C system adopts large-scale digital multi-beam phased array antenna, and a single station can realize simultaneous TT&C of dozens of targets distributed in the whole airspace, which can not only meet the TT&C task requirements of multi-type missiles with multi-wave multi-launch, but also adapt to the development trend of future TT&C networking, realize "on-demand access", and represent the development direction of the new generation of satellite TT&C equipment.

[0003] As the core equipment of digital multi-beam phased array, the digital multi-beam assembly, the technical research of miniaturization, integration, multi-channel, integration and reconfigurability is carried out, and the core basic fields such as front-line technology, advanced packaging technology, microsystem, process collaborative research and intelligent manufacturing technology are combined with domestic and foreign research basis, and the professional development direction of new technology, new system and new situation is forecasted, and the modular integration is taken as the design main line, the design complexity is reduced, the interface types and quantities are reduced, and the equipment reliability is improved, which is convenient for the use requirements of modularization, standardization and array splicing of large phased array in the future, and meets the requirements of miniaturization and flexibility of the whole array. SUMMARY

[0004] In order to solve the problems of compact structure, limited array height, harsh weight requirement and difficulty in reducing system servo drive of large ground phased array system, and in view of the low integration of the existing multi-channel digital receiving assembly, the separation of various functional components and the complex system integration, an S-band 48-channel tile type integrated digital receiving assembly is provided, the originally independent passive cavity filter, radio frequency front end, frequency conversion assembly, calibration and local oscillator power division network and DBF signal transfer board and other components are integrated by a microwave multilayer composite substrate through tile type integrated design, the functional density is improved, and the interconnection length between the antenna, active component and DBF processing is shortened. The problems of tight internal space of large array, complex electromagnetic compatibility and harsh structure weight requirement are solved, and the technical characteristics of high channel consistency, miniaturized multi-channel, zero debugging, low cost and easy batch production are achieved. The assembly has compact structure and can be used as a standard module, so that the large DBF phased array system is flexible and has strong reconfigurability.

[0005] The application provides an S-band 48-channel tile type integrated digital receiving assembly, which comprises a shell, a radio frequency input interface arranged on the upper surface of the shell, a radio frequency filter front-end module, an internal interconnection interface, a frequency conversion module and an intermediate frequency output interface arranged in the shell in a tile type and in a stacked mode, the radio frequency input interface is electrically connected with the radio frequency filter front-end module, the internal interconnection interface is connected with the radio frequency filter front-end module and the frequency conversion module respectively, the frequency conversion module is electrically connected with the intermediate frequency output interface, the radio frequency filter front-end module is used for receiving a radio frequency signal, filtering and amplifying the radio frequency signal and then outputting the radio frequency signal to the frequency conversion module through the internal interconnection interface, and the frequency conversion module is used for receiving a signal, mixing the signal, obtaining an intermediate frequency signal and then amplifying and outputting the intermediate frequency signal to a DBF processor through the intermediate frequency output interface.

[0006] The number of the radio frequency input interface, the radio frequency filter front-end module, the internal interconnection interface, the frequency conversion module and the intermediate frequency output interface is at least 2 and all are equal-phase and equal-length structures.

[0007] The radio frequency filter front-end module comprises passive cavity filters and a radio frequency front-end component which are electrically connected in sequence, and all the passive cavity filters are integrated with the circuit of the digital receiving assembly.

[0008] As a preferred mode, the radio frequency front-end component is a radio frequency amplifier, the frequency conversion module comprises a mixer and an intermediate frequency amplifier which are electrically connected with the radio frequency front-end component in sequence, and the mixer is electrically connected with a local oscillator power division network.

[0009] All the passive cavity filters are integrated with the circuit of the digital receiving assembly to become a structure box body of the radio frequency active component.

[0010] As a preferred mode, the S-band 48-channel tile type integrated digital receiving assembly further comprises a coupler which is electrically connected with the radio frequency input interface at one end and electrically connected with the radio frequency filter front-end module at the other end, a digital processing switching power division network which is electrically connected with the frequency conversion module at one end and electrically connected with the intermediate frequency output interface at the other end, a calibration interface, a local oscillator interface and a power supply interface arranged on the surface of the shell, a calibration power division network which is electrically connected with the calibration interface at one end and electrically connected with the radio frequency filter front-end module at the other end, and a local oscillator power division network which is electrically connected with the local oscillator interface at one end and electrically connected with the frequency conversion module at the other end.

[0011] The passive cavity filter, the radio frequency front-end component, the frequency conversion module, the digital processing switching power division network, the calibration power division network and the local oscillator power division network are integrated by a microwave multilayer composite substrate.

[0012] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the radio frequency input interface, the intermediate frequency output interface, the calibration interface, the local oscillator interface and the power supply interface are all quick plug connectors.

[0013] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the number of radio frequency input interfaces, radio frequency filter front-end modules, frequency conversion modules, intermediate frequency output interfaces and couplers is 48; the power supply interface, the calibration power division network and the local oscillator power division network are all 48-way.

[0014] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the shell includes the same number of tuning cover plates as the radio frequency filter front-end modules, and the tuning cover plates are the same size.

[0015] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, further includes at least two temperature collectors uniformly arranged in the shell, and the temperature collectors are used for real-time reporting of temperature.

[0016] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the radio frequency input interface, the internal interconnection interface and the intermediate frequency output interface are all blind plug interconnections.

[0017] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the surfaces of the printed boards are all coated with three-proof paint.

[0018] The S-band 48-channel tile type integrated digital receiving assembly, as a preferred mode, the interiors of all structure boxes are silver-plated, and the surfaces are conductive oxidized.

[0019] The technical solution of the present application is:

[0020] The component adopts passive cavity filter and radio frequency front-end, frequency conversion component integrated design, has the functions of different frequency band time-sharing work of radio frequency and output intermediate frequency signal is always fixed bandwidth intermediate frequency signal, filters, amplifies and mixes the incoming wave signal, and outputs 48-way intermediate frequency signal to the data processing, and has the function of large and small gain adjustment.

[0021] The internal circuit of the receiving component is all designed with equal phase and equal length, including 48-way radio frequency amplification and frequency conversion link, 48-way calibration power division network, 48-way local oscillator power division network design, which ensures the amplitude and phase consistency and stability of each signal.

[0022] In order to meet the requirements of weight reduction and integrated design, the assembly adopts 48-channel circuit board whole plate design, which is different from the previous structure sub-cavity and equal distribution of printed board design, and the whole design can meet the consistency of circuit performance parameters, ensure the consistency of amplitude and phase, and meet the batch and manufacturability of electrical assembly process. Through the flexible and independent metal cavity technology, the structure processing difficulty is reduced, the independent sub-cavity between different channels can be realized, and the isolation requirement between system channels is met.

[0023] The application relates to an S-band 48-channel tile integrated digital receiving assembly based on a digital multi-beam system, which is suitable for a large-scale digital multi-beam (DBF) active phased array system, in particular a vehicle-mounted large-scale ground S-band satellite communication measurement and control system with high requirements for integration, miniaturization, high integration and high reliability.

[0024] The application has the following advantages:

[0025] (1) The application adopts passive cavity filter and assembly structure circuit integrated design, the structure body of the passive cavity filter is used as the structure box body of the radio frequency active assembly, and the 48-channel cavity filter structure is integrally formed, so that high Q value narrow band filtering of incoming wave signals is realized, and structure filtering integrated design is realized. Compared with the traditional design, the weight is reduced by 40%, and the volume is reduced by 35%.

[0026] (2) The application adopts a tile type laminated structure, realizes vertical integration of passive cavity filters, radio frequency active circuits, power division networks, frequency conversion active power supplies and other multifunctional components, and realizes a large reduction in the vertical volume of the assembly by means of advanced packaging technology and microwave multilayer composite substrates.

[0027] (3) The application has an advanced surface treatment process, the inside of the passive cavity filter adopts a silver plating process, the structure surface adopts a traditional conductive oxidation process, and the surface of the printed board is coated with a three-proofing paint, so that high temperature and humidity environment corrosion resistance, mildew resistance and other three-proofing properties are realized.

[0028] (4) The assembly structure and the system liquid cooling heat dissipation are integrally designed, temperature collectors are uniformly distributed in each part of the assembly, real-time temperature of the assembly can be reported in real time, and system monitoring and data processing are facilitated.

[0029] (5) The application realizes 48-way receiving signal acquisition and processing, all channels and modules adopt a modular design concept, a unified and standardized unit assembly design specification is proposed, the active circuit topological structure in each antenna unit is consistent, the system amplitude and phase consistency requirement is met, a plurality of different structure forms such as 4-way, 16-way, 64-way, 18-way and 20-way splicing modules can be formed, reconfiguration and repeatability are achieved, the system is spectrumized, and the research and development cycle of the large-scale phased array system can be quickly improved.

[0030] (6)All the interfaces of radio frequency, intermediate frequency, power supply and the like of the application adopt blind insertion interconnection, solve the problems of cable-free requirement of phased array system, and quick insertion, quick detection and quick maintenance of T / R module. In order to realize accurate interconnection and reliable insertion of 48 channels, the module structure is provided with a guide structure, and quick, stable, accurate and damage-free positioning and interconnection can be realized.

[0031] The digital receiving module is a core component of a large ground digital phased array, and determines the cost, producibility and system performance of the whole system. The design and implementation form of the digital receiving module has the characteristics of miniaturization, high integration, low cost and full automation production, and the reconfigurable design of the receiving module is the premise and basis for delivery and batch production of the large ground digital phased array. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a "tile type" structure model diagram of an S-band 48-channel tile type integrated digital receiving module;

[0033] Figure 2 It is a principle diagram of an S-band 48-channel tile type integrated digital receiving module;

[0034] Figure 3 It is an integrated cavity filter model diagram of an S-band 48-channel tile type integrated digital receiving module;

[0035] Figure 4a It is an intermediate frequency external interface schematic diagram of an S-band 48-channel tile type integrated digital receiving module;

[0036] Figure 4b It is an RF external interface schematic diagram of an S-band 48-channel tile type integrated digital receiving module.

[0037] REFERENCE NUMERALS:

[0038] 1, shell; 2, RF input interface; 3, RF filter front-end module; 31, passive cavity filter; 32, RF front-end module; 4, internal interconnection interface; 5, frequency conversion module; 51, mixer; 52, intermediate frequency amplifier; 6, intermediate frequency output interface; 7, coupler; 8, digital processing switching power division network; 9, calibration interface; 10, local oscillator interface; 11, power supply interface; 12, calibration power division network; 13, local oscillator power division network. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all embodiments.

[0040] Example 1

[0041] As Figure 1 A S-band 48-channel tile integrated digital receiving assembly is shown in FIG. 4, which comprises a shell 1, a radio frequency input interface 2 arranged on the upper surface of the shell 1, a radio frequency filter front-end module 3, an internal interconnection interface 4, a frequency conversion module 5 arranged in the shell 1 in a tile manner, an intermediate frequency output interface 6 arranged on the lower surface of the shell 1, a coupler 7 having one end electrically connected to the radio frequency input interface 2 and the other end electrically connected to the radio frequency filter front-end module 3, a digital processing switching power distribution network 8 having one end electrically connected to the frequency conversion module 5 and the other end electrically connected to the intermediate frequency output interface 6, a calibration interface 9, a local oscillator interface 10 and a power supply interface 11 arranged on the surface of the shell 1, a calibration power distribution network 12 having one end electrically connected to the calibration interface 9 and the other end electrically connected to the radio frequency filter front-end module 3, and a local oscillator power distribution network 13 having one end electrically connected to the local oscillator interface 10 and the other end electrically connected to the frequency conversion module 5;

[0042] The radio frequency input interface 2 is electrically connected to the radio frequency filter front-end module 3, the internal interconnection interface 4 is connected to the radio frequency filter front-end module 3 and the frequency conversion module 5 respectively, the frequency conversion module 5 is electrically connected to the intermediate frequency output interface 6, the radio frequency filter front-end module 3 is used to receive radio frequency signals, filter and amplify the signals, and then output the signals to the frequency conversion module 5 through the internal interconnection interface 4, and the frequency conversion module 5 is used to receive signals, mix the signals, obtain intermediate frequency signals, and then amplify the signals and output the signals to a DBF processor through the intermediate frequency output interface 6;

[0043] The number of the radio frequency input interface 2, the radio frequency filter front-end module 3, the internal interconnection interface 4, the frequency conversion module 5 and the intermediate frequency output interface 6 is at least 2, and all of them are equal-phase and equal-length structures;

[0044] The radio frequency filter front-end module 3 comprises a passive cavity filter 31 and a radio frequency front-end component 32 connected in sequence, and all the passive cavity filters 31 are integrated with the circuit of the digital receiving assembly;

[0045] The radio frequency front-end component 32 is a radio frequency amplifier, the frequency conversion module 5 comprises a mixer 51 and an intermediate frequency amplifier 52 connected in sequence with the radio frequency front-end component 32, and the mixer 51 is electrically connected to the local oscillator power distribution network;

[0046] All the passive cavity filters 31 are integrated with the circuit of the digital receiving assembly to become a structure box of the radio frequency active component, the inside of the structure box is silver-plated, and the surface is conductive oxidized;

[0047] The passive cavity filter 31, the radio frequency front-end component 32, the frequency conversion module 5, the digital processing switching power distribution network 8, the calibration power distribution network 12 and the local oscillator power distribution network 13 are integrated by a microwave multilayer composite substrate;

[0048] The radio frequency input interface 2, the intermediate frequency output interface 6, the calibration interface 9, the local oscillator interface 10 and the power supply interface 11 are all quick plug connectors;

[0049] The number of the radio frequency input interface 2, the radio frequency filter front end module 3, the frequency conversion module 5, the intermediate frequency output interface 6 and the coupler 7 is 48; the power supply interface 11, the calibration power division network 12 and the local oscillator power division network 13 are all divided into 48 paths;

[0050] The shell 1 includes the same number of tuning cover plates as the radio frequency filter front end module 3, and the tuning cover plates are the same size;

[0051] It also includes at least two temperature collectors uniformly arranged inside the shell 1, and the temperature collectors are used for real-time reporting of temperature;

[0052] The radio frequency input interface 2, the internal interconnection interface 4 and the intermediate frequency output interface 6 are all blind plug interconnections;

[0053] All the printed board surfaces are coated with three-proof paint.

[0054] Embodiment 2

[0055] As shown in Figure 1 Fig. 4, an S-band 48-channel tile type integrated digital receiving assembly;

[0056] Figure 1 It is a tile type structure model diagram of the S-band 48-channel tile type integrated digital receiving assembly of the application. The traditional assembly design is usually a brick type structure. As can be seen from the above diagram, in order to shorten the longitudinal structure, the vertical laminated structure, i.e. the tile type structure, is adopted, which is from top to bottom, the antenna radio frequency input interface, the radio frequency filter front end module, the internal interconnection interface, the frequency conversion module and the intermediate frequency output interface. It can be seen that the real one-layer laminated design is realized, and through the reasonable division of the internal structure and the cavity lamination, the effective isolation of various signals is realized, which ensures the high gain of the assembly and realizes the low stray and low leakage.

[0057] As shown in Figure 2 It is a schematic diagram. As can be seen from the diagram, the S-band 48-channel tile type integrated digital receiving assembly includes 48 complete same digital assemblies. Each link includes radio frequency front end filtering, signal coupling, radio frequency amplification, mixing drive and intermediate frequency amplification output parts. The assembly includes calibration network, local oscillator power division network, digital processing switching power division network and power supply parts.

[0058] The specific working process is as follows:

[0059] The signals received by the antenna, after being filtered by the couplers N1-N48 and the cavity filters Z1-Z48, enter the receiving assembly, the processed signals are pre-amplified by the radio frequency amplifiers A1-A48 and sent to the mixers M1-M48, the signals are mixed with the local oscillator signals LO, and the output is an intermediate frequency signal, the intermediate frequency signals are output to the digital processing switching power distribution network WN through the intermediate frequency amplifiers D1-D48, and the 48-channel intermediate frequency signals are output to the DBF processor through the switching power distribution network. When the system is in the calibration mode, the calibration signals sent by the system are sent to the 48-channel active channels through the couplers N1-N48, and the signal working process is consistent with the antenna signal working process, so as to achieve the purpose of monitoring and detecting the working state of each active channel.

[0060] Figure 3 The S-band 48-channel tile type integrated digital receiving assembly of the application integrates the cavity filter model, as shown in the figure, the 48-channel passive cavity filter resonant cavity is directly realized in the whole machine structure, and the effective isolation of the 48 channels is realized through the same tuning cover plate, which ensures the independence of each channel signal and reduces signal crosstalk, and at the same time, the overall processing of the multi-channel cavity filter can reduce the demand for the structure of the independent channel cavity wall, which is of great significance to the weight reduction and miniaturization of the whole machine.

[0061] Figure 4 is a schematic diagram of the external interface of the S-band 48-channel tile type integrated digital receiving assembly of the application, wherein Figure 4a is the intermediate frequency interface model diagram of the DBF processor, including 48-channel intermediate frequency interface, 1-channel local oscillator interface, 1-channel calibration interface and power supply interface, Figure 4b is the antenna radio frequency interface model diagram, as shown in the figure, all connectors are quick plug connectors, and the channel guide can easily realize the quick plugging, detection and maintenance of the assembly.

[0062] The structure volume of the S-band 48-channel tile type integrated digital receiving assembly of the application is 230mm*366mm*47mm, the single-channel assembly is only 15mm*110mm*47mm, the weight is only 0.125Kg, the single-channel gain can reach more than 70dB, and the 25dB gain can be adjusted, the application has been successfully applied to a certain system DBF phased array system, and the miniaturization, integration, tile type and integration characteristics have achieved excellent performance parameters of the digital receiving assembly, and the flexible configuration design of the phased array system has been realized, which provides strong support for large DBF phased array systems.

[0063] The above is only the preferred embodiment of the application, but the protection scope of the application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the application within the technical range disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A S-band 48-channel tiled integrated digital receive assembly, characterized by: The application relates to a radio frequency filter front-end module, which comprises a shell (1), a radio frequency input interface (2) arranged on the upper surface of the shell (1), radio frequency filter front-end modules (3) arranged in a tile type and in the interior of the shell (1), an internal interconnection interface (4), a frequency conversion module (5), an intermediate frequency output interface (6) arranged on the lower surface of the shell (1), a coupler (7) with one end electrically connected to the radio frequency input interface (2) and the other end electrically connected to the radio frequency filter front-end module (3), a digital processing switching power distribution network (8) with one end electrically connected to the frequency conversion module (5) and the other end electrically connected to the intermediate frequency output interface (6), a calibration interface (9), a local oscillator interface (10) and a power supply interface (11) arranged on the surface of the shell (1), a calibration power distribution network (12) with one end electrically connected to the calibration interface (9) and the other end electrically connected to the radio frequency filter front-end module (3), a local oscillator power distribution network (13) with one end electrically connected to the local oscillator interface (10) and the other end electrically connected to the frequency conversion module (5), and at least two temperature collectors evenly arranged in the interior of the shell (1), wherein the temperature collectors are used for real-time temperature reporting. The radio frequency input interface (2) is electrically connected to the radio frequency filter front-end module (3), the internal interconnection interface (4) is connected to the radio frequency filter front-end module (3) and the frequency conversion module (5) respectively, the frequency conversion module (5) is electrically connected to the intermediate frequency output interface (6), the radio frequency filter front-end module (3) is used for receiving radio frequency signals, filtering and amplifying the radio frequency signals and then outputting the radio frequency signals to the frequency conversion module (5) through the internal interconnection interface (4), and the frequency conversion module (5) is used for receiving signals, mixing the signals, obtaining intermediate frequency signals and then amplifying and outputting the intermediate frequency signals to a DBF processor through the intermediate frequency output interface (6). The number of the radio frequency input interface (2), the radio frequency filter front-end module (3), the internal interconnection interface (4), the frequency conversion module (5) and the intermediate frequency output interface (6) is at least 2 and all are equal-phase and equal-length structures. The number of the radio frequency input interface (2), the radio frequency filter front-end module (3), the frequency conversion module (5), the intermediate frequency output interface (6), the coupler (7) is 48; the power supply interface (11), the calibration power distribution network (12) and the local oscillator power distribution network (13) are all 1 / 48. The radio frequency filter front-end module (3) comprises a passive cavity filter (31) and a radio frequency front-end component (32) which are electrically connected in sequence. The passive cavity filter (31), the radio frequency front-end component (32), the frequency conversion module (5), the digital processing switching power distribution network (8), the calibration power distribution network (12), the local oscillator power distribution network (13) are integrated in a tile type through a microwave multilayer composite substrate. The radio frequency front-end component (32) is a radio frequency amplifier, the frequency conversion module (5) comprises a mixer (51) and an intermediate frequency amplifier (52) which are electrically connected with the radio frequency front-end component (32) in sequence, and the mixer (51) is electrically connected with a local oscillator power division network; 48 passive cavity filters (31) are integrated with circuits of the digital receiving component to become a structural box of the radio frequency active component, and effective isolation between channels is realized through the same tuning cover plate; the passive cavity filters (31) are internally silver-plated; The radio frequency input interface (2), the internal interconnection interface (4) and the intermediate frequency output interface (6) are all blind insertion interconnections; The signals received by the antenna are filtered by the coupler (7) and the passive cavity filter (31) and then enter the radio frequency front-end component (32), the processed signals are pre-amplified by a radio frequency amplifier and then sent into the mixer (51), the signals are mixed with local oscillator signals LO to output intermediate frequency signals, the intermediate frequency signals are output to the digital processing switching power division network (8) through the intermediate frequency amplifier (52), and the intermediate frequency signals are output to the DBF processor through the digital processing switching power division network (8); When the system is in a calibration mode, calibration signals sent by the system are sent into active channels through the coupler (7), the signal working process is the same as that of the antenna received signals, and the working states of the active channels are monitored and detected.

2. The S-band 48-channel tiled integrated digital receive assembly of claim 1, wherein: The radio frequency input interface (2), the intermediate frequency output interface (6), the calibration interface (9), the local oscillator interface (10) and the power supply interface (11) are all fast insertion connectors.

3. The S-band 48-channel tiled integrated digital receive assembly of claim 1, wherein: The shell (1) comprises tuning cover plates which are the same in number as the radio frequency filter front-end module (3) and are the same in size.

4. The S-band 48-channel tiled integrated digital receive assembly of claim 1, wherein: All printed board surfaces are coated with three-proofing paint.

5. The S-band 48-channel tiled integrated digital receive assembly of claim 1, wherein: The structural box is internally silver-plated and the surface is conductive oxidized.

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