A K-band expandable tile subarray, phased array antenna and satellite system

Abstract

This application is applicable to the field of satellite communication, and provides a K-band expandable tile subarray, a phased array antenna and a satellite system. The tile subarray includes: a K-band tile frequency converter and multiple K-band multi-channel tile components; a subarray digital phased array antenna is provided on the first side of each K-band multi-channel tile component, and a first radio frequency interface and a first power supply control interface are provided on the second side; the K-band tile frequency converter is provided with multiple second radio frequency interfaces and multiple second power supply control interfaces; the multiple K-band multi-channel tile components and the K-band tile frequency converter are connected through the first radio frequency interface and the second radio frequency interface, and the first power supply control interface and the second power supply control interface are connected. This application can achieve a low profile height, simplify the structure, improve the maintainability and expandability, and realize the design of subarray digital application.

Description

Technical Field

[0001] This application belongs to the field of satellite communication, and particularly relates to a K-band expandable tile subarray, a phased array antenna, and a satellite system. Background Art

[0002] After the development of phased array antennas has gone through passive phased arrays and active analog phased arrays, it is now gradually developing towards optically controlled arrays, digital arrays, and ultra-wideband digital arrays. The optically controlled array system is currently limited by the conversion efficiency of optoelectronic devices and the level of optoelectronic hybrid integration. Digital arrays are favored for their flexible multi-beam capabilities. With the rapid development of digital circuits, the digital integration ability has been gradually improved, and the digital-analog boundary has gradually approached the antenna end, making the phased array based on digital TR more viable.

[0003] Since the frequency band used in satellite communication is relatively high, the corresponding array antenna channel spacing is small, only a few millimeters. If each channel is digitized, the integration difficulty is too great and the power consumption is huge, making it impossible to achieve. In engineering, the phased array antenna system is often implemented by means of subarray-level digitization. The subarray unit in the phased array antenna is the core part of the phased array system, and its integration level determines the profile height and weight of the entire system. Currently, the equipment has extremely strict requirements for the volume and weight of the phased array antenna. Phased array antennas are roughly divided into two types according to the integration method: one is the brick structure, and the other is the tile structure. The phased array antenna with a brick structure is heavy in weight and bulky in volume. The tile structure is commonly found in analog phased array antennas. The phased array of tile-type expandable digital subarrays currently has a large profile height, a complex structure, and insufficient maintainability and scalability. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a K-band expandable and digital tile subarray, which can achieve a low profile height, simplify the structure, and improve the maintainability and scalability.

[0005] In a first aspect, an embodiment of the present application provides a K-band expandable tile subarray, including a K-band tile-type frequency converter and a plurality of K-band multi-channel tile-type components;

[0006] A subarray digital phased array antenna is provided on the first side of each K-band multi-channel tile-type component, and a first radio frequency interface and a first power supply control interface are provided on the second side; the K-band tile-type frequency converter is provided with a plurality of second radio frequency interfaces and a plurality of second power supply control interfaces;

[0007] The K-band multi-channel tile component and the K-band tile frequency converter are connected through a first radio frequency interface and a second radio frequency interface, and the first power supply control interface is connected to the second power supply control interface; the first radio frequency interface is plugged into the second radio frequency interface with an SMP male head and an SMP female head; the first power supply control interface and the second power supply control interface are connected by a flexible low-frequency connector.

[0008] In a possible implementation of the first aspect, the K-band multi-channel tile component includes a first housing, a sub-array digital phased array antenna, a first radio frequency interface, and a first power supply control interface;

[0009] The sub-array digital phased array antenna is arranged on the first side of the first housing; the first radio frequency interface is arranged on the second side of the first housing; the first power supply control interface is arranged on the second side of the first housing;

[0010] wherein, the first side of the first housing is opposite to the second side of the first housing, and the sub-array digital phased array antenna is connected to the first radio frequency interface.

[0011] In a possible implementation of the first aspect, the sub-array digital phased array antennas are arranged in an N×M array, and both N and M are positive integers.

[0012] In a possible implementation of the first aspect, the K-band tile frequency converter includes a second housing, a second radio frequency interface, a second power supply control interface, an intermediate frequency interface, a third power supply control interface, and a local oscillator interface;

[0013] The second radio frequency interface is arranged on the first side of the second housing; there are multiple second radio frequency interfaces;

[0014] The second power supply control interface is arranged on the first side of the second housing; there are multiple second power supply control interfaces;

[0015] The intermediate frequency interface is arranged on the second side of the second housing;

[0016] The third power supply control interface is arranged on the second side of the second housing; the third power supply control interface can be connected to an external power supply to supply power to the K-band tile frequency converter;

[0017] The local oscillator interface is arranged on the second side of the second housing; the local oscillator interface is used to connect to an external local oscillator;

[0018] wherein, the first side of the second housing is opposite to the second side of the second housing, the second radio frequency interface of the K-band tile frequency converter is connected to the intermediate frequency interface; the second power supply control interface is connected to the third power supply control interface to supply power to the multiple K-band multi-channel tile components.

[0019] In a possible implementation of the first aspect, a fixing hole is provided on the second side surface of the first housing, and a mounting hole corresponding to and matching the fixing hole is provided on the first side surface of the second housing. The K-band multi-channel tile-type component and the K-band tile-type frequency converter are assembled through the fixing hole and the mounting hole.

[0020] The fixing hole and the mounting hole play a limiting role in the connection of the first radio frequency interface and the second radio frequency interface.

[0021] In a possible implementation of the first aspect, the link of the tile subarray includes N×M K-band multi-channel tile-type component links and K-band tile-type frequency converter links.

[0022] The K-band multi-channel tile-type component link includes a first amplifier, a phase shifter, a second amplifier, an attenuator, and a power divider.

[0023] The K-band tile-type frequency converter link includes a first filter, a third amplifier, a second filter, a fourth amplifier, a mixer, a local oscillator amplifier, an intermediate frequency band-pass filter, a first intermediate frequency amplifier, a delay unit, a second intermediate frequency amplifier, and a third filter.

[0024] The first amplifier, the phase shifter, the second amplifier, the attenuator, and the power divider are connected in sequence.

[0025] The K-band tile-type frequency converter link, the first filter, the third amplifier, the second filter, the fourth amplifier, the mixer, the intermediate frequency band-pass filter, the first intermediate frequency amplifier, the delay unit, the second intermediate frequency amplifier, and the third filter are connected in sequence.

[0026] The local oscillator amplifier is connected to the mixer.

[0027] In a second aspect, an embodiment of the present application provides a signal processing method for a K-band expandable tile subarray, including:

[0028] Amplify, perform amplitude-phase control and synthesis on a radio frequency signal through a K-band multi-channel tile-type component, and output a first signal.

[0029] Filter, amplify, mix and delay the first signal through a K-band tile-type frequency converter, and then output a second signal.

[0030] Input the second signal output by the K-band tile-type frequency converter into the system for ADC sampling, and convert the subarray analog signal into a digital signal.

[0031] A specific possible implementation of the second aspect is as follows: The tile subarray with expandable K-band outputs the signal collected by the subarray digital phased array antenna as a first signal through a first RF interface; inputs the first signal into a K-band tile frequency converter through a second RF interface; outputs the first signal input into the K-band tile frequency converter as a second signal through an intermediate frequency interface; inputs the second signal output from the intermediate frequency interface into the system for ADC sampling to convert the subarray analog signal into a digital signal.

[0032] In a third aspect, the present application provides a phased array antenna, including the tile subarray with expandable K-band as described in any item of the first aspect.

[0033] In a fourth aspect, the present application provides a satellite system, including at least one phased array antenna as described in the second aspect.

[0034] It can be understood that the beneficial effects of the above second aspect, third aspect, and fourth aspect can refer to the relevant descriptions in the first aspect above, and will not be elaborated here.

[0035] Compared with the prior art, the present application has at least the following beneficial effects:

[0036] The K-band multi-channel tile components and the K-band tile frequency converter are connected into a tile subarray with expandable K-band through the plugging of SMP male and female connectors and elastic low-frequency connectors; the tile subarray is also expanded and laid out according to the array surface design of the subarray digital phased array antenna, achieving a low profile height, simplifying the structure, improving the maintainability and expandability, and realizing the subarray digital application design.

[0037] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic structural diagram of a tile subarray with expandable K-band provided by an embodiment of the present application;

[0040] Figure 2 It is a schematic structural diagram of a K-band multi-channel tile component provided by an embodiment of the present application;

[0041] Figure 3It is a schematic internal structure diagram of a K-band multi-channel tile component provided by an embodiment of the present application;

[0042] Figure 4 It is a schematic structural diagram of a K-band tile frequency converter provided by an embodiment of the present application;

[0043] Figure 5 It is a schematic link diagram of a K-band expandable tile subarray provided by an embodiment of the present application.

[0044] In the drawings, 1 is a K-band multi-channel tile component, 101 is a first housing, 1011 is a subarray digital phased array antenna, 1012 is a box body, 1013 is a cover plate, 1014 is a TR component amplification function layer, 1015 is an amplitude-phase control function layer, 1016 is a power supply control function layer, 102 is a first radio frequency interface, 103 is a first power supply control interface, and 104 is a fixing hole;

[0045] 2 is a K-band tile frequency converter, 202 is a second radio frequency interface, 203 is a second power supply control interface, 204 is an intermediate frequency interface, 205 is a third power supply control interface, 206 is a local oscillator interface, 207 is a mounting hole, 300 is a link of the tile subarray, 301 is a link of the K-band multi-channel tile component, 302 is a link of the K-band tile frequency converter, 3011 is a first amplifier, 3012 is a phase shifter, 3013 is a second amplifier, 3014 is an attenuator, 3015 is a power splitter, 3021 is a first filter, 3022 is a third amplifier, 3023 is a second filter, 3024 is a fourth amplifier, 3025 is a mixer, 3026 is a local oscillator amplifier, 3027 is an intermediate frequency band-pass filter, 3028 is a first intermediate frequency amplifier, 3029 is a delay element, 30210 is a second intermediate frequency amplifier, and 30211 is a third filter. Detailed implementation manners

[0046] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0047] It should be understood that when used in the specification of the present application and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0048] It should also be understood that the term "and / or" as used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0049] In addition, in the description of the specification and appended claims of this application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0050] Referring to "one embodiment" or "some embodiments" described in the specification of this application means that a specific feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0051] The phased array of tile - type extensible digital sub - arrays currently has a large profile height, complex structure, and insufficient maintainability and scalability, and thus urgently needs improvement.

[0052] Based on the above problems, in an embodiment of this application, a K - band extensible tile - type sub - array is provided. The tile - type sub - array includes: a K - band tile - type frequency converter and a plurality of K - band multi - channel tile - type components; a sub - array digital phased array antenna is provided on the first side of each K - band multi - channel tile - type component, and a first radio - frequency interface and a first power supply control interface are provided on the second side; the K - band tile - type frequency converter is provided with a plurality of second radio - frequency interfaces and a plurality of second power supply control interfaces; the plurality of K - band multi - channel tile - type components and the K - band tile - type frequency converter are connected through the first radio - frequency interface and the second radio - frequency interface, and the first power supply control interface and the second power supply control interface are connected. This tile - type sub - array can achieve a low profile height, simplify the structure, improve the maintainability and scalability, and realize the sub - array digital application design.

[0053] The following further elaborates on the present invention in detail in conjunction with the accompanying drawings and specific embodiments.

[0054] Figure 1 is a structural schematic diagram of a K - band extensible tile - type sub - array provided by an embodiment of this application. Referring to Figure 1 , the K - band extensible tile - type sub - array includes a plurality of K - band multi - channel tile - type components 1 and a K - band tile - type frequency converter 2. Figure 1Figures (a) and (b) therein are the structures of the K-band expandable tile subarray observed from different angles.

[0055] On the first side of each K-band multi-channel tile component 1, a subarray digital phased array antenna 1011 is provided, and on the second side, a first RF interface 102 and a first power supply control interface 103 are provided; the K-band tile frequency converter 2 is provided with a plurality of second RF interfaces 202 and a plurality of second power supply control interfaces 203; a plurality of K-band multi-channel tile components 1 and the K-band tile frequency converter 2 are connected through the first RF interface 102 and the second RF interface 202, and the first power supply control interface 103 and the second power supply control interface 203 are connected.

[0056] Specifically, the first RF interface 102 with an SMP male head is inserted into the second RF 202 interface with an SMP female head; the first power supply control interface 103 and the second power supply control interface 203 are connected by a flexible low-frequency connector.

[0057] For the specific structure of each K-band multi-channel tile component 1, refer to Figure 2 , Figure 2 Figures (a) and (b) therein are the structure diagrams of the K-band multi-channel tile component 1 observed from different angles.

[0058] The K-band multi-channel tile component includes: a first housing 101, a subarray digital phased array antenna 1011, a first RF interface 102, and a first power supply control interface 103. The digital phased array antenna 1011 is arranged on the first side of the first housing 101; the first RF interface 102 is arranged on the second side of the first housing 101; the first power supply control interface 103 is arranged on the second side of the first housing 101. Among them, the first side of the first housing 101 is opposite to the second side of the first housing 101, and the digital phased array antenna 1011 is connected to the first RF interface 102.

[0059] Specifically, the digital phased array antenna is arranged in an N×M array, and both N and M are positive integers.

[0060] Among them, refer to Figure 3 , each K-band multi-channel tile component has a multi-layer stacked structure, including: applying three-dimensional stacking technology to three-dimensionally stack three functional layers to form a high-density integrated TR component functional module. The three functional layers include a TR component amplification functional layer 1014, an amplitude-phase control functional layer 1015, and a power supply control functional layer 1016; at the same time, the box body 1012, the functional module, and the cover plate 1013 are press-fitted to form a tile component. Figure 3 Figures (a) and (b) therein are the internal structure diagrams of the K-band multi-channel tile component 1 observed from different angles

[0061] When applying the press-fit and sealing welding assembly method to realize the assembly of the functional modules and structures of the TR component, a flexible expandable TR component is realized, which has very wide application value and usability technical effects in the field of microwave and millimeter-wave radar communication with strict requirements.

[0062] Exemplarily, the amplification functional layer of the TR component includes an amplifier chip and a multi-layer ceramic substrate, and the amplification functional layer of the TR component is used to amplify radio frequency signals. The amplitude-phase control functional layer is connected to the amplification functional layer of the TR component and includes a 16-channel amplitude-phase control multi-functional chip and a synthesis network to synthesize and output radio frequency signals. The power supply control functional layer is connected to the amplitude-phase control functional layer of the TR component and includes capacitors, resistors, radio frequency ports, and serial-parallel conversion chips to transmit radio frequency signals to the outside of the component and at the same time process and transmit the power supply control signals to the TR amplitude-phase control functional layer.

[0063] Exemplarily, the above-mentioned functional layers of each part are interconnected through interlayer bumps to realize interlayer radio frequency and power supply control interconnection and provide structural support functions.

[0064] Exemplarily, the structural box body 1012 and the cover plate 1013, wherein the structural box body 1012 features include dimensions of 29.2mm×29.2mm×7mm, 16 dielectric through-hole connectors, four concave cavities on the four walls of the box body for installing press-fit buckles, and a cavity with dimensions of 27.2mm×27.2mm×5mm inside the box body. The cover plate features include dimensions of 29.2 mm×29.2mm×1mm, two stud holes for screwing M2 screws, an SMP connector, and a 4mm×12mm cavity for fixing an elastic connector. The connector connected to the antenna is a cylindrical dielectric material with a hole in the middle, filled with a needle at one end and a wool button at the other end. The needle side of the connector is connected to the antenna, and the wool button side is connected to the TR three-dimensional stacking module.

[0065] For the specific structure of the K-band tile-type frequency converter 2, refer to Figure 4 , Figure 4 In (a) and (b) of which are the structural diagrams of the K-band tile-type frequency converter 2 observed from the front and back respectively.

[0066] Specifically, the K-band tile-type frequency converter 2 includes: a second housing 201, a second RF interface 202, a second power supply control interface 203, an intermediate frequency interface 204, a third power supply control interface 205, and a local oscillator interface 206. The second RF interface 202 is provided on the first side surface of the second housing 201, and there are multiple second RF interfaces 202. The second power supply control interface 203 is provided on the first side surface of the second housing 201, and there are multiple second power supply control interfaces 203. The intermediate frequency interface 204 is provided on the second side surface of the second housing 201. The third power supply control interface 205 is provided on the second side surface of the second housing 201, and the third power supply control interface 205 can be connected to an external power supply and a control board to provide power supply and control signals for the K-band tile-type frequency converter. The local oscillator interface 206 is provided on the second side surface of the second housing 201 for connecting to an external local oscillator. Among them, the first side surface of the second housing 201 is opposite to the second side surface of the second housing 201, and the second RF interface 202 is connected to the intermediate frequency interface 204; the second power supply control interface 203 is connected to the third power supply control interface 205 to provide power supply and control signals for multiple K-band multi-channel tile-type components.

[0067] Specifically, a fixing hole 104 is provided on the second side surface of the first housing 101, and a mounting hole 207 corresponding to and matching the fixing hole is provided on the first side surface of the second housing. The K-band multi-channel tile-type component 1 and the K-band tile-type frequency converter 2 are assembled through the fixing hole 104 and the mounting hole 207, and the fixing hole 104 and the mounting hole 207 play a limiting role in the connection of the first RF interface 102 and the second RF interface 202.

[0068] See Figure 5 , the link 300 of the tile subarray includes N×M K-band multi-channel tile-type component links 301 and a K-band tile-type frequency converter link 302.

[0069] The K-band multi-channel tile-type component link 301 includes a first amplifier 3011, a phase shifter 3012, a second amplifier 3013, an attenuator 3014, and a power divider 3015.

[0070] The K-band tile-type frequency converter link 302 includes a first filter 3021, a third amplifier 3022, a second filter 3023, a fourth amplifier 3024, a mixer 3025, a local oscillator amplifier 3026, an intermediate frequency band-pass filter 3027, a first intermediate frequency amplifier 3028, a delay element 3029, a second intermediate frequency amplifier 30210, and a third filter 30211.

[0071] The first amplifier 3011, the phase shifter 3012, the second amplifier 3013, the attenuator 3014, and the power divider 3015 are connected in sequence.

[0072] The K-band tile type frequency converter link 302, the first filter 3021, the third amplifier 3022, the second filter 3023, the fourth amplifier 3024, the mixer 3025, the intermediate frequency band-pass filter 3027, the first intermediate frequency amplifier 3028, the delay unit 3029, the second intermediate frequency amplifier 30210 and the third filter 30211 are connected in sequence.

[0073] The local oscillator amplifier 3026 is connected to the mixer 3025.

[0074] The embodiment of the present application also provides a signal processing method for a K-band expandable tile type subarray. The radio frequency signal is amplified, amplitude-phase controlled and synthesized by the K-band multi-channel tile type component 1 to output a first signal; the first signal is filtered, amplified, mixed and delayed by the K-band tile type frequency converter 2 to output a second signal; the second signal output by the K-band tile type frequency converter is input into the system for ADC sampling to convert the subarray analog signal into a digital signal.

[0075] Exemplarily, the K-band expandable tile type subarray outputs the signal collected by the subarray digital phased array antenna 1011 as the first signal through the first radio frequency interface 102; inputs the first signal into the K-band tile type frequency converter 2 through the second radio frequency interface 202; outputs the first signal input into the K-band tile type frequency converter 2 as the second signal through the intermediate frequency interface 204; inputs the second signal output by the intermediate frequency interface 204 into the system for ADC sampling to convert the subarray analog signal into a digital signal.

[0076] Exemplarily, a K-band expandable tile type subarray includes four tile type components and one tile type frequency converter. Each component integrates 16 radio frequency front-end channels and a 16-in-1 power divider to form a 4×4 total 16-channel component. To reduce the profile height, the channel end of the 16-channel tile type component is connected to the antenna in the form of pin-out, and the other side uses a button SMP connector and an elastic low-frequency connector to be vertically connected to the internal circuit of the component. Within the entire 8×8 channel area, a four-in-1 radio frequency combiner, a radio frequency link, a local oscillator link and an intermediate frequency link are integrated, and the radio frequency, local oscillator, intermediate frequency and power supply control interfaces form a tile type frequency converter; the radio frequency, local oscillator and intermediate frequency interfaces are all vertically connected to the circuit using button SMPs; the power supply control interfaces are all vertically connected to the circuit using elastic low-frequency connectors. The four tile type components and one tile type frequency converter are fixed by screws to form an expandable and digital tile type subarray.

[0077] Exemplarily, see Figure 5, the tile - type component contains 16 channels. After the RF signals of each channel are received by the antenna probes and enter the component, they are amplified by a low - noise amplifier, amplitude - and - phase - modulated, then synthesized by a 16 - in - 1 power divider in the component, and finally output through the RF SMP port on the back. To ensure the lowest profile height of the tile - type component, it is implemented in a three - layer stacked form, integrating RF and power supply control in an integrated design, enabling 16 feeding pins on the front of the tile - type component and one SMP and one power supply control interface on the back. To ensure the vertical connection of RF and power supply control to the component, the RF uses the SMP pin - button form, and the power supply control uses the multi - pin elastic low - frequency connector form. Finally, the size of the entire component is 29.6mm×29.6mm×7mm; the size of the entire tile - type frequency converter is 59.2mm×59.2mm×8mm. The RF signals enter the internal circuit of the frequency converter through four RF interfaces of the tile - type frequency converter, and after filtering, amplification, filtering, mixing, intermediate - frequency filtering, amplification, delay, amplification, and filtering, they are output. The external local oscillator signal enters the mixer after being amplified through the internal circuit of the frequency converter. The RF and power supply control adopt an integrated design, distributing a part of the power supply control signal provided by the system to four components and the other part to each device inside the frequency converter.

[0078] Exemplarily, the K - band expandable tile - type sub - array is designed according to an 8×8 array. The K - band expandable tile - type sub - array has the scalability of the array scale and can be expanded by an integer multiple according to the 8×8 array scale, such as scales of 16×64 arrays, etc.

[0079] The K - band expandable tile - type sub - array can be applied to a digital phased - array antenna system or an analog phased - array antenna system.

[0080] The embodiment of the present application also provides a phased - array antenna, including any one of the above - mentioned K - band expandable tile - type sub - arrays, and having the beneficial effects of the above - mentioned K - band expandable tile - type sub - arrays.

[0081] The embodiment of the present application also provides a satellite system, including at least one of the above - mentioned phased - array antennas, and having the beneficial effects of the above - mentioned phased - array antennas.

[0082] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0083] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A K-band expandable tile subarray, characterized in that, It includes a K-band tile-type frequency converter (2) and multiple K-band multi-channel tile-type components (1); On the first side of each K-band multi-channel tile-type component (1), there is a sub-array digital phased array antenna (1011), and on the second side, there are a first RF interface (102) and a first power supply control interface (103); the K-band tile-type frequency converter (2) is provided with multiple second RF interfaces (202) and multiple second power supply control interfaces (203); The K-band multi-channel tile-type component (1) and the K-band tile-type frequency converter (2) are connected through the first RF interface (102) and the second RF interface (202), and the first power supply control interface (103) is connected to the second power supply control interface (203); the first RF interface (102) is plugged into the second RF interface (202) with an SMP male head and an SMP female head; the first power supply control interface (103) and the second power supply control interface (203) are connected with a flexible low-frequency connector; the link of the tile sub-array includes N×M K-band multi-channel tile-type component links (301) and a K-band tile-type frequency converter link (302); The K-band multi-channel tile-type component link (301) includes a first amplifier (3011), a phase shifter (3012), a second amplifier (3013), an attenuator (3014), and a power divider (3015); The K-band tile-type frequency converter link (302) includes a first filter (3021), a third amplifier (3022), a second filter (3023), a fourth amplifier (3024), a mixer (3025), a local oscillator amplifier (3026), an intermediate frequency band-pass filter (3027), a first intermediate frequency amplifier (3028), a delay element (3029), a second intermediate frequency amplifier (30210), and a third filter (30211); The first amplifier (3011), the phase shifter (3012), the second amplifier (3013), the attenuator (3014), and the power divider (3015) are connected in sequence; The K-band tile-type frequency converter link (302), the first filter (3021), the third amplifier (3022), the second filter (3023), the fourth amplifier (3024), the mixer (3025), the intermediate frequency band-pass filter (3027), the first intermediate frequency amplifier (3028), the delay element (3029), the second intermediate frequency amplifier (30210), and the third filter (30211) are connected in sequence; the local oscillator amplifier (3026) is connected to the mixer (3025).

2. The expandable K-band tile subarray according to claim 1, wherein The K-band multi-channel tile-type component (1) includes a first housing (101), a sub-array digital phased array antenna (1011), a first RF interface (102), and a first power supply control interface (103); The sub-array digital phased array antenna (1011) is arranged on the first side of the first housing (101); the first RF interface (102) is arranged on the second side of the first housing (101); the first power supply control interface (103) is arranged on the second side of the first housing (101); Among them, the first side of the first housing (101) is opposite to the second side of the first housing (101), and the sub-array digital phased array antenna (1011) is connected to the first radio frequency interface (102).

3. The expandable K-band tile subarray according to claim 2, wherein, The K-band tile type frequency converter (2) includes a second housing (201), a second radio frequency interface (202), a second power supply control interface (203), an intermediate frequency interface (204), a third power supply control interface (205), and a local oscillator interface (206); The second radio frequency interface (202) is arranged on the first side of the second housing; there are a plurality of the second radio frequency interfaces; The second power supply control interface (203) is arranged on the first side of the second housing (201); There are a plurality of the second power supply control interfaces (203); The intermediate frequency interface (204) is arranged on the second side of the second housing (201); The third power supply control interface (205) is arranged on the second side of the second housing (201); the third power supply control interface (205) can be connected to an external power supply to supply power to the K-band tile type frequency converter; The local oscillator interface (206) is arranged on the second side of the second housing (201); the local oscillator interface (206) is used to connect to an external local oscillator; Among them, the first side of the second housing (201) is opposite to the second side of the second housing (201), and the second radio frequency interface (202) of the K-band tile type frequency converter is connected to the intermediate frequency interface (204); the second power supply control interface (203) is connected to the third power supply control interface (205) to supply power to the plurality of K-band multi-channel tile type components.

4. The expandable K-band tile subarray according to claim 3, wherein A fixing hole (104) is provided on the second side of the first housing (101), and a mounting hole (207) corresponding to and matching the fixing hole (104) is provided on the first side of the second housing (201). The K-band multi-channel tile type component (1) and the K-band tile type frequency converter (2) are assembled through the fixing hole and the mounting hole (207); The fixing hole (104) and the mounting hole (207) play a limiting role in the connection of the first radio frequency interface (102) and the second radio frequency interface (202).

5. The expandable K-band tile subarray according to claim 1, characterized in that, The sub-array digital phased array antenna (1011) is arranged in an N×M array, and both N and M are positive integers.

6. A signal processing method for a K-band scalable tile subarray according to any one of claims 1-5, characterized in that, Including: Amplify, amplitude-phase control and synthesize the radio frequency signal through the K-band multi-channel tile type component (1) to output a first signal; filter, amplify, mix and delay the first signal through the K-band tile type frequency converter (2) and then output a second signal; Input the second signal output by the K-band tile type frequency converter (2) into the system for ADC sampling to convert the sub-array analog signal into a digital signal.

7. The signal processing method according to claim 6, characterized in that, The K-band expandable tile subarray outputs the signal collected by the subarray digital phased array antenna (1011) as a first signal through the first radio frequency interface (102); inputs the first signal into the K-band tile frequency converter (2) through the second radio frequency interface (202); outputs the first signal input into the K-band tile frequency converter (2) as a second signal through the intermediate frequency interface (204); inputs the second signal output by the intermediate frequency interface (204) into the system for ADC sampling, and converts the subarray analog signal into a digital signal.

8. A phased array antenna, characterized in that, Comprising the K-band expandable tile subarray according to any one of claims 1 to 5.

9. A satellite system, characterized in that, Comprising at least one phased array antenna according to claim 8.

Images