A broadband multi-signal feed device

Abstract

This invention discloses a broadband multi-signal power supply device, in which a multi-layer stripline hybrid plate is composed of multiple circuit layers. The multi-layer stripline hybrid plate is connected to a metal frame, and LRM connectors are installed on the metal frame. The LRM connectors and the circuit layers within the multi-layer stripline hybrid plate achieve electrical signal connection. The multi-layer stripline hybrid plate is used for signal transmission, and simultaneously, signal transmission with the outside world is achieved through vertically interconnected LRM connectors. The metal frame is used to fix the multi-layer stripline hybrid plate and to achieve its positioning and structural protection. The solution of this invention utilizes the stripline structure in the multi-layer stripline hybrid plate, ensuring that the thickness of each layer is within 1 mm, and the total thickness after multi-layer crimping is also controlled within a sufficiently thin range. Furthermore, it eliminates the need for coaxial cables used in traditional signal transmission, resulting in significant improvements in size and weight, and superior phase consistency and stability.

Description

Technical Field

[0001] This invention belongs to the field of phased array active electronic devices, specifically relating to a broadband multi-signal feeding device. Background Technology

[0002] Phased array active electronic devices are an important component of modern electronic application systems. Active phased array application systems employ phased array antennas, utilizing spatial power combining of radiating elements to generate high-power signals. Through agile beam switching, they can simultaneously process multiple targets across all directions and frequency bands. Through effective radiated power control and precise beam pointing control, active phased array application systems can precisely process targets, reduce the impact of active interference on equipment operating at the same frequency, improve overall equipment efficiency, effectively control power consumption, and reduce costs.

[0003] In traditional phased arrays, the signals of the array are transmitted through a complex power supply network. The entire phased array is huge, which limits the flexibility and adaptability of the array. Summary of the Invention

[0004] The purpose of this invention is to provide a broadband multi-signal power supply device.

[0005] The specific technical solution for achieving the objective of this invention is as follows:

[0006] A broadband multi-signal power supply device includes a multilayer stripline mixing plate, an LRM connector, and a metal frame;

[0007] The multi-layer stripline mixing plate is composed of multiple circuit layers. The multi-layer stripline mixing plate is connected to a metal frame. An LRM connector is provided on the metal frame. The LRM connector and the circuit layers in the multi-layer stripline mixing plate are electrically connected to the signal.

[0008] The multi-layer stripline mixing plate is used to realize signal transmission, and at the same time, it realizes signal transmission with the outside world through the vertical interconnection LRM connector;

[0009] The metal frame is used to fix the multi-layer strip wire mixed pressure plate and to achieve the positioning and structural protection of the multi-layer strip wire mixed pressure plate.

[0010] Furthermore, the multilayer stripline mixing board places signals on different layers according to different signal attributes, and improves the transmission performance of radio frequency signals and the isolation between signals through layered layout, transition optimization and other methods.

[0011] The signal attributes include the signal's frequency, power, and type;

[0012] The transmission circuits for the different attribute signals are arranged on different circuit layers. Through the design of layered independent layout and optimized inter-layer transition structure, the transmission performance of radio frequency signals is improved and the isolation between different signals is enhanced.

[0013] Furthermore, a grounding layer is provided between adjacent circuit layers of the multilayer stripline hybrid plate to isolate electromagnetic interference between circuit layers.

[0014] An insulating layer is provided between each circuit layer and the ground layer. All circuit layers and ground layers are pressed and bonded together into a single multilayer board structure through the insulating layer.

[0015] Furthermore, the circuit layer includes a power divider circuit, which is a broadband power divider circuit adapted to the power distribution and synthesis of multi-band radio frequency signals. The wiring of the power divider circuit is adapted to the interlayer structure of the multi-layer stripline hybrid board to ensure the phase consistency of signal transmission.

[0016] Furthermore, the inputs and outputs of the circuit layers of the LRM connector and the multilayer stripline hybrid board are interconnected with the outside world via a vertical transition.

[0017] The input and output ends of the multi-layer stripline mixing plate are interconnected with coaxial connectors at corresponding positions through vertical transitions, and after passing through the coaxial cable, they are output externally using LRM type connectors.

[0018] Furthermore, metal shielding posts are installed at the connection points with the multi-layer stripline hybrid pressure plate to form a near-coaxial structure and reduce electromagnetic interference.

[0019] Furthermore, the LRM connector, through a vertical transition structure, achieves electrical interconnection with the signal input and signal output terminals of the circuit layer of the multilayer stripline hybrid board, thereby completing signal interaction with the outside world;

[0020] The signal input and output terminals of the multi-layer stripline mixing plate are electrically interconnected with the coaxial connector at corresponding positions through a vertical transition structure. After the radio frequency signal of the coaxial connector passes through the multi-layer stripline mixing plate, it connects with the signal terminal of the LRM type connector, and the LRM type connector realizes the input and output of signals to the outside.

[0021] Furthermore, a metal shielding post is provided around the connection between the coaxial connector and the multilayer strip wire mixing plate;

[0022] The metal shielding post is electrically connected to the grounding layer of the multi-layer stripline hybrid plate to form a near-coaxial shielding structure, reducing electromagnetic radiation and external electromagnetic interference at the connection point.

[0023] Furthermore, the broadband multi-signal power supply device also includes an adapter structure;

[0024] The multi-layer stripline mixing plate, LRM connector and metal frame are connected to form a whole and set in the adapter structure. The adapter structure is provided with a variety of standardized installation interfaces to enable the power supply device to be adapted to external equipment in different installation forms.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] (1) The present invention utilizes the stripline structure in the multilayer stripline hybrid plate, so that the thickness of each layer is within 1 mm, and the total thickness after multilayer pressing can also be controlled within a sufficiently thin range. It also eliminates the need for coaxial cables used in traditional signal transmission, resulting in significant improvements in volume and weight. At the same time, the elimination of a large number of RF cables makes the product more concise and aesthetically pleasing, and its reliability and stability are also higher. The layers are isolated by metal ground, which can effectively shield signal leakage, ensure the isolation between each layer, and improve the electromagnetic compatibility of the entire power supply device.

[0027] In practical use, the types and quantities of RF circuits can be increased or decreased according to actual needs, thereby adapting to various application scenarios and providing good performance and better installation compatibility for RF power supply.

[0028] (2) Compared with the traditional implementation method of using conventional power dividers + cables, this power supply device has great advantages in terms of volume and weight. The main body of the multi-signal power supply device is very small. Even with the addition of metal adapter structural components, its volume is basically equal to the total volume of the traditional power divider + cable implementation method. Therefore, the volume of this power supply device is only 20% of the traditional method, and the weight is reduced by more than 60%.

[0029] In addition, since the signal is transmitted using a stripline method, there are no longer a large number of cables, making the whole device very simple and superior in terms of phase consistency and phase stability.

[0030] The present invention will be further described below with reference to specific embodiments. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the broadband multi-signal power supply device in this scheme.

[0032] Figure 2 This is a 3D rendering of the broadband multi-signal power supply device for this solution.

[0033] Figure 3 This is a structural exploded view of the broadband multi-signal power supply device in this scheme.

[0034] Figure 4 This is a schematic diagram of the single-layer power divider circuit topology in the multi-layer stripline hybrid circuit board of this scheme.

[0035] Figure 5 This is a schematic diagram of the single-layer power divider circuit and port connection method of this scheme.

[0036] Figure 6 This is a schematic diagram of the coaxial connector for this solution.

[0037] Figure 7 This is a 3D rendering of the reverse reinforced metal frame of the broadband multi-signal power supply device in this scheme. Detailed Implementation

[0038] Example

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0042] Combination Figures 1 to 3 A broadband multi-signal power supply device includes a multi-layer stripline mixing plate, an LRM connector, and a metal frame.

[0043] The multi-layer stripline mixing plate is composed of multiple circuit layers. The multi-layer stripline mixing plate is connected to a metal frame. An LRM connector is provided on the metal frame. The LRM connector and the circuit layers in the multi-layer stripline mixing plate are electrically connected to the signal.

[0044] The multi-layer stripline mixing plate is used to realize signal transmission, and at the same time, it realizes signal transmission with the outside world through the vertical interconnection LRM connector;

[0045] The metal frame is used to fix the multi-layer strip wire mixed pressure plate and to achieve the positioning and structural protection of the multi-layer strip wire mixed pressure plate.

[0046] Specifically, the multilayer stripline mixing board places signals on different layers according to different signal attributes, and improves the transmission performance of radio frequency signals and the isolation between signals through layered layout, transition optimization and other methods.

[0047] The signal attributes used for layering include the signal's frequency, power, and type;

[0048] The transmission circuits for the different attribute signals are arranged on different circuit layers. Through the design of layered independent layout and optimized inter-layer transition structure, the transmission performance of radio frequency signals is improved and the isolation between different signals is enhanced.

[0049] In addition, a grounding layer is provided between adjacent circuit layers of the multilayer stripline hybrid plate to isolate electromagnetic interference between circuit layers.

[0050] An insulating layer is provided between each circuit layer and the ground layer. All circuit layers and ground layers are pressed and bonded together into a single multi-layer board structure through the insulating layer.

[0051] The single-layer thickness of the stripline hybrid pressure plate in this solution is in the sub-millimeter range, which can realize complex circuit connections in a limited space and meet the requirements of miniaturization and high integration of electronic devices.

[0052] Combination Figure 4 and Figure 5 The circuit layer includes a power divider circuit, which is a broadband power divider circuit that is adapted to the power distribution and combining of multi-band radio frequency signals. The wiring of the power divider circuit is adapted to the interlayer structure of the multi-layer stripline hybrid board to ensure the phase consistency of signal transmission.

[0053] The RF circuit section uses a stripline configuration. The input impedance matching formula for the power divider is as follows:

[0054] Input port characteristic impedance: Zin= Equal power divider (K=1): Zin=Z0 (ideal matching, no additional matching network required)

[0055] Isolation resistor (to ensure port isolation): R= Simplified equal power divider: R=2Z0 (R=100Ω in a 50Ω system);

[0056] like Figure 4 The diagram shows the topology of one layer of the power divider circuit. It clearly demonstrates the specific layout, signal routing, port positions, and stripline routing of the single-layer broadband power divider circuit. It intuitively presents the topology and signal distribution path of the power divider circuit. The output is located at the same position in each LRM socket, and the output form is a stripline to coaxial connector.

[0057] The inputs and outputs of the circuit layers of the LRM connector and the multilayer stripline hybrid board are interconnected with the outside world through a vertical transition.

[0058] The input and output ends of the multi-layer stripline mixing plate are interconnected with coaxial connectors at corresponding positions through vertical transitions, and after passing through the coaxial cable, they are output externally using LRM type connectors.

[0059] Metal shielding posts are installed at the connection with the multi-layer stripline hybrid pressure plate to form a coaxial structure and reduce electromagnetic interference.

[0060] The LRM connector, through a vertical transition structure, achieves electrical interconnection with the signal input and signal output terminals of the circuit layer of the multi-layer stripline hybrid board, thereby completing signal interaction with the outside world.

[0061] The signal input and output terminals of the multi-layer stripline mixing plate are electrically interconnected with the coaxial connector at corresponding positions through a vertical transition structure. After the radio frequency signal of the coaxial connector passes through the multi-layer stripline mixing plate, it connects with the signal terminal of the LRM type connector, and the LRM type connector realizes the input and output of signals to the outside.

[0062] A metal shielding post is provided around the connection between the coaxial connector and the multi-layer strip wire mixing plate.

[0063] The metal shielding post is electrically connected to the grounding layer of the multi-layer stripline hybrid plate to form a near-coaxial shielding structure, reducing electromagnetic radiation and external electromagnetic interference at the connection point.

[0064] In addition, the broadband multi-signal power supply device also includes an adapter structure;

[0065] The multi-layer stripline mixing plate, LRM connector and metal frame are connected to form a whole and set in the adapter structure. The adapter structure is provided with a variety of standardized installation interfaces to enable the power supply device to be adapted to external equipment in different installation forms.

[0066] Figure 5 , Figure 6Details of the stripline section and coaxial connectors are provided. The inner metal conductor of the coaxial connector vertically passes through the printed circuit board and connects to the corresponding layer. The solder joints are uniformly located behind the printed circuit board, facilitating easy and reliable soldering. Four grounding posts are evenly distributed around the inner conductor, effectively shielding the signal and creating a coaxial-like structure in the vertical transition section. Connectors at the same location on each LRM socket connect to the power divider circuit on the same layer. A multi-layer hybrid board integrates multi-band power divider circuits onto a single motherboard, mounting connectors, metal shielding covers, and other accessories to ultimately form… Figure 1 , Figure 6 and Figure 7 The complete view of the device.

[0067] This embodiment provides a broadband multi-signal feeding device, which is suitable for feeding multi-channel broadband radio frequency signals on a phased array radar array. Its structure is shown in Figures 1-7, including a multi-layer stripline mixing plate 1, a high-density radio frequency LRM connector 2, an aluminum alloy metal frame 3, and standardized adapter structural components 4.

[0068] Among them, the multi-layer strip wire mixed pressure plate 1 has an 8-layer (conductive functional layer and insulating layer) structure, which is composed of 4 circuit layers, 3 grounding layers and 5 insulating layers, and the thickness of each layer is controlled within 0.8mm, and the overall thickness is ≤6mm.

[0069] The four circuit layers, based on the signal attributes of the phased array radar, respectively arrange the transmission circuits for the transmit signal channel, receive signal channel, calibration signal channel, and control signal channel. Each circuit layer (e.g.) Figure 4 and 5 (As shown) All of them integrate a 1-to-8 broadband power divider circuit, which is suitable for the transmission and power distribution of broadband radio frequency signals from 50MHz to 18GHz;

[0070] In addition, a grounding layer is set between adjacent circuit layers. Grounding layer 1 is made of copper foil and is connected to the edge lead-out end of the multilayer stripline hybrid circuit board to achieve electromagnetic interference isolation between layers. The insulating layer between each layer is made of the dielectric layer material of high-frequency copper-clad laminate to ensure interlayer insulation while adapting to low-loss transmission of broadband radio frequency signals.

[0071] The metal frame 3 is precision machined from 6061 aluminum alloy. Its inner wall is tightly fitted to the edge of the multi-layer stripline mixing plate 1. It is fixedly connected to the multi-layer stripline mixing plate 1 by positioning pins and bolts. The metal frame 3 is electrically connected to the grounding layer of the multi-layer stripline mixing plate 1, which not only completes the structural protection and positioning of the multi-layer stripline mixing plate 1, but also further improves the overall electromagnetic shielding performance of the device.

[0072] LRM connector 2 is a 16-channel high-density RF LRM connector, mounted on one side of the metal frame 3. It is electrically interconnected with the signal input and output terminals of the circuit layer of the multi-layer stripline mixing plate 1 through a vertical transition pad. The signal terminals of the multi-layer stripline mixing plate 1 are soldered with coaxial connectors 5 at corresponding positions. Four metal shielding posts 6 are arranged around the connection between the coaxial connector 5 and the multi-layer stripline mixing plate 1. The metal shielding posts 6 are soldered to the ground layer to form a quasi-coaxial shielding structure, reducing electromagnetic interference at the connection. The signal terminals of the coaxial connector 5 pass through and connect with the signal terminals of LRM connector 2, enabling the LRM connector 2 to interact with external signals from the phased array radar array.

[0073] The adapter component 4 is made of sheet metal and has internal positioning grooves and fastening holes that are compatible with the integrated main structure (multi-layer stripline hybrid pressure plate 1 + LRM connector 2 + metal frame 3) to embed and fix the integrated main structure inside. The outer wall of the adapter component 4 is equipped with three standardized installation interfaces: bolt connection interface, guide rail installation interface and snap-fit ​​interface. The installation method can be flexibly selected according to the installation space of the phased array radar array to achieve quick adaptation and connection with external equipment.

[0074] The broadband multi-signal feeding device in this embodiment has an overall volume of 700mm×60mm×150mm, which is only 20% of the traditional power divider + cable feeding method, and a weight of 5kg, which is 65% smaller than the traditional method. In the 50MHz-18GHz frequency band, the signal transmission insertion loss is ≤5dB (1 to 16), the phase consistency of each channel is ≤±10°, the signal isolation between different signals is ≥80dB, the electromagnetic compatibility meets the requirements of GJB151B-2013 standard, and the structure is compact with no large number of connecting cables, which greatly improves reliability and stability. It can work stably in a wide temperature environment of -40℃ to +70℃, perfectly meeting the miniaturization, integration and high reliability design requirements of phased array radar arrays.

[0075] The embodiments described above are merely one implementation method of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A broadband multi-signal power supply device, characterized in that, Includes multi-layer stripline mixing plate, LRM connector and metal frame; The multi-layer stripline mixing plate is composed of multiple circuit layers. The multi-layer stripline mixing plate is connected to a metal frame. An LRM connector is provided on the metal frame. The LRM connector and the circuit layers in the multi-layer stripline mixing plate are electrically connected to the signal. The multi-layer stripline mixing plate is used to realize signal transmission, and at the same time, it realizes signal transmission with the outside world through the vertical interconnection LRM connector; The metal frame is used to fix the multi-layer strip wire mixed pressure plate and to achieve the positioning and structural protection of the multi-layer strip wire mixed pressure plate.

2. The broadband multi-signal power supply device according to claim 1, characterized in that, The multilayer stripline mixing board places signals on different layers according to their different attributes, and improves the transmission performance of radio frequency signals and the isolation between signals through layered layout, transition optimization and other methods. The signal attributes include the signal's frequency, power, and type; The transmission circuits for the different attribute signals are arranged on different circuit layers. Through the design of layered independent layout and optimized inter-layer transition structure, the transmission performance of radio frequency signals is improved and the isolation between different signals is enhanced.

3. The broadband multi-signal power supply device according to claim 2, characterized in that, A grounding layer is provided between adjacent circuit layers of the multi-layer stripline hybrid plate to isolate electromagnetic interference between circuit layers. An insulating layer is provided between each circuit layer and the ground layer. All circuit layers and ground layers are pressed and bonded together into a single multilayer board structure through the insulating layer.

4. The broadband multi-signal power supply device according to claim 2, characterized in that, The circuit layer includes a power divider circuit, which is a broadband power divider circuit that is adapted to the power distribution and synthesis of multi-band radio frequency signals. The wiring of the power divider circuit is adapted to the interlayer structure of the multi-layer stripline hybrid board to ensure the phase consistency of signal transmission.

5. The broadband multi-signal power supply device according to claim 2, characterized in that, The inputs and outputs of the circuit layers of the LRM connector and the multilayer stripline hybrid board are interconnected with the outside world through a vertical transition. The input and output ends of the multi-layer stripline mixing plate are interconnected with coaxial connectors at corresponding positions through vertical transitions, and after passing through the coaxial cable, they are output externally using LRM type connectors.

6. The broadband multi-signal power supply device according to claim 5, characterized in that, Metal shielding posts are installed at the connection with the multi-layer stripline hybrid pressure plate to form a coaxial structure and reduce electromagnetic interference.

7. The broadband multi-signal power supply device according to claim 2, characterized in that, The LRM connector, through a vertical transition structure, achieves electrical interconnection with the signal input and signal output terminals of the circuit layer of the multi-layer stripline hybrid board, thereby completing signal interaction with the outside world. The signal input and output terminals of the multi-layer stripline mixing plate are electrically interconnected with the coaxial connector at corresponding positions through a vertical transition structure. After the radio frequency signal of the coaxial connector passes through the multi-layer stripline mixing plate, it is connected to the signal terminal of the LRM type connector, and the LRM type connector realizes the input and output of signals to the outside.

8. The broadband multi-signal power supply device according to claim 7, characterized in that, A metal shielding post is provided around the connection between the coaxial connector and the multi-layer strip wire mixing plate. The metal shielding post is electrically connected to the grounding layer of the multi-layer stripline hybrid plate to form a near-coaxial shielding structure, reducing electromagnetic radiation and external electromagnetic interference at the connection point.

9. The broadband multi-signal power supply device according to claim 1, characterized in that, The broadband multi-signal power supply device also includes an adapter structure; The multi-layer stripline mixing plate, LRM connector and metal frame are connected to form a whole and set in the adapter structure. The adapter structure is provided with a variety of standardized installation interfaces to enable the power supply device to be adapted to external equipment in different installation forms.

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