A laminated printed circuit board for an electronic countermeasure device signal processing system

Abstract

The utility model relates to the field of electronic countermeasure signal processing system especially relates to a kind of laminated plate type printed circuit board for electronic countermeasure equipment signal processing system.The AD board of the utility model includes a piece 4 passageway AD chip and a piece low-power FPGA, and the 4-way analog signal of external collection is sent into AD chip after signal conditioning to complete the conversion of analog / digital signal, and processing board includes a piece high-performance FPGA chip, and signal filtering, frequency domain analysis, signal feature extraction function are completed;Interface board includes a piece system-level SOC chip integrated with ARM processor and FPGA logic.The device of the utility model can not only avoid the crosstalk problem of different functional modules in board, improve the overall performance of circuit, but also realize the demand of product miniaturization.

Description

Technical Field

[0001] This utility model relates to the field of electronic countermeasures signal processing systems, and in particular to a stacked printed circuit board for use in electronic countermeasures equipment signal processing systems. Background Technology

[0002] In today's era of rapid technological advancement, portable and handheld electronic products have become the mainstream development trend of modern products. Electronic countermeasures products, such as electronic jamming equipment, frequency reconnaissance equipment, and anti-non-functionality equipment, are exhibiting a demand for miniaturization and portability. For portable and handheld products, miniaturization means integrating more functions and higher performance within a limited physical space. In the circuit design of signal processing systems, functions such as data acquisition, signal processing, data transmission, and power management must be completed within a limited space, which places extremely high demands on the design of printed circuit boards.

[0003] Traditional circuit design methods fall short when faced with space constraints. To meet multifunctional design requirements, it is often necessary to increase the variety and quantity of circuit components, which leads to an increase in printed circuit board (PCB) size, contradicting the goal of device miniaturization. Therefore, how to reduce PCB size while ensuring that device functional requirements are met has become a problem that designers need to solve. Summary of the Invention

[0004] To address the needs of the prior art, this utility model provides a stacked printed circuit board for signal processing systems in electronic countermeasures equipment. This utility model is applicable to circuit design scenarios where area size is limited but device height is not a major constraint. By distributing different circuit modules onto different printed circuit boards and fully utilizing vertical space for stacking assembly, more circuit components can be accommodated within a limited planar area, thereby enabling more system functions.

[0005] The technical solution of this utility model is: a stacked printed circuit board for a signal processing system of electronic countermeasures equipment, comprising three printed circuits: an AD board, a processing board, and an interface board. The AD board, processing board, and interface board are of the same size. The key feature is that the printed circuit boards are connected via XMC1.0 series sockets, and are mounted and fixed using studs and screws. The AD board includes a 4-channel AD chip and a low-power FPGA. Four externally acquired analog signals are conditioned and then fed into the AD chip to complete the analog-to-digital signal conversion. The processing board includes a high-performance FPGA chip, performing signal filtering, frequency domain analysis, and signal feature extraction. The interface board includes a system-on-a-chip (SoC) integrating an ARM processor and FPGA logic.

[0006] According to the above-described stacked printed circuit board for signal processing system of electronic countermeasures equipment, the features are as follows: the AD board completes data acquisition and preprocessing of 1 to 4 AD signals, and the data is transmitted to the processing board through interconnected XMC connectors; the processing board completes the implementation of the signal processing algorithm, and the processed data is transmitted to the interface board through the XMC connector; the interface board sends the processed reported data to the terminal for display in a specified format; the control commands sent from the terminal to the system are distributed after being parsed through the network interface of the interface board, and are transmitted to the AD board and the processing board respectively through the XMC interface.

[0007] According to the above-described stacked printed circuit board for signal processing system of electronic countermeasures equipment, the characteristic is that: the dimensions of the three types of printed circuit boards are all 100mm×70mm, and the mounting and fixing hole positions are consistent.

[0008] According to the above-described stacked printed circuit board for a signal processing system of electronic countermeasures equipment, the characteristic is that the signal transmission between the AD board, the processing board and the interface board uses a socket XMC-0619-03Z and a matching plug XMC-0619-10T.

[0009] The beneficial effects of this utility model are: to meet different system functional requirements, the design circuit of a certain functional board can be flexibly optimized or improved, avoiding the redesign of the entire system; other functional boards, such as positioning and orientation boards, can also be added; data information can be connected to the interface board through the reserved interface via an external cable, and data information can be reported through the interface board; this can avoid crosstalk problems between different functional modules within the board, improve the overall performance of the circuit, and meet the requirements of product miniaturization. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure.

[0011] Figure 2 This is a schematic diagram of the AD board layout.

[0012] Figure 3 This is a schematic diagram of the board layout.

[0013] Figure 4 This is a schematic diagram of the interface board layout.

[0014] Figure 5 This is a system connection diagram.

[0015] Figure 6 This is a block diagram of the AD board.

[0016] Figure 7 This is a block diagram of the processing board.

[0017] Figure 8This is a schematic diagram of the interface board. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, a stacked printed circuit board for a signal processing system of electronic countermeasures equipment comprises three functional modules of the same size: an AD board, a processing board, and an interface board. The printed circuit boards are connected via XMC1.0 series sockets for data exchange. The three printed circuit boards are mounted and secured using Φ2.5 studs and screws. All three types of printed circuit boards in this invention are 100mm × 70mm in size, and the mounting holes are in the same position. Signal transmission between the AD board, processing board, and interface board uses socket XMC-0619-03Z and matching plug XMC-0619-10T, with a total of 114 customizable pins and a 10mm height at the connector insertion point.

[0020] like Figure 2 As shown, the AD board's power interface, debugging interface, clock input, and data acquisition input interface all use right-angle connectors, with the connecting cable accessing from the side of the printed circuit board. The main heat dissipation components of the AD board are located on the bottom surface of the printed circuit board for easy contact with the housing for heat dissipation. The XMC connector is used for data exchange with the processing board.

[0021] like Figure 3 As shown, the power and debugging interfaces of the processing board use bent connectors, with the connecting cable accessed from the side of the printed circuit board. The XMC socket is located on the bottom of the printed circuit board and connects to the XMC connector of the AD board for data exchange. The XMC connector is located on the front of the printed circuit board and is used for data exchange with the interface board.

[0022] like Figure 4 As shown, the XMC socket of the interface board is located on the bottom surface of the printed circuit board and connects to the XMC connector of the processing board for data exchange. The interface board includes a power interface, a debugging interface, a network interface, and a reserved test interface for external data transmission and receiving control commands.

[0023] like Figure 5As shown, a stacked printed circuit board for a signal processing system of electronic countermeasures equipment includes an AD board, a processing board, and an interface board. The AD board completes data acquisition and preprocessing of 1 to 4 channels of AD signals. The preprocessed data is transmitted to the processing board via interconnected XMC connectors. The processing board implements the signal processing algorithm, and the processed data is transmitted to the interface board via the XMC connector. The interface board sends the processed reported data to the terminal for display according to a specified format. Control commands sent from the terminal to the system are parsed and distributed through the interface board's network interface, and then transmitted to the AD board and processing board respectively via the XMC interface. The system uses two power supplies: a 12V digital power supply powers all digital circuits in the system, and an analog 5V power supply powers the analog circuits in the AD board. This effectively suppresses noise coupling and avoids signal crosstalk, thereby improving system stability and reliability.

[0024] like Figure 6 The AD board shown includes a 4-channel AD chip and a low-power FPGA. The four externally acquired analog signals are conditioned and then sent to the AD chip to complete the analog-to-digital signal conversion. The converted digital signals are sent to the FPGA to complete signal synchronization control, digital pulse compression processing and other processes before being sent to the processing board.

[0025] like Figure 7 The processing board shown includes a high-performance FPGA chip, which performs functions such as signal filtering, frequency domain analysis, and signal feature extraction. As the complexity of the signal processing flow increases, a FPGA with more abundant logic gate resources can be selected as a replacement.

[0026] like Figure 8 The interface board shown includes a system-on-a-chip (SoC) integrating an ARM processor and FPGA logic, combining the high-efficiency processing power of ARM with the flexibility of FPGA. The ARM section primarily handles efficient data processing and real-time control, parsing and distributing command parameters from the terminal system, and reporting system operating status. The FPGA section mainly implements data packet transmission and sends it to the terminal system via a network interface.

[0027] This invention is applicable to circuit design scenarios where there are limitations on area size but no significant restrictions on device height. By distributing different circuit modules onto different printed circuit boards, it fully utilizes vertical space for stacked assembly, thereby accommodating more circuit components within a limited planar area and achieving more system functions. The device of this invention avoids crosstalk problems between different functional modules within the board, improving the overall performance of the circuit, and also meets the need for product miniaturization.

Claims

1. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment, comprising three printed circuits: an AD board, a processing board, and an interface board, wherein the AD board, processing board, and interface board are of the same size, characterized in that: The printed circuit boards are connected via XMC1.0 series sockets. The printed circuit boards are mounted and fixed with studs and screws. The AD board includes a 4-channel AD chip and a low-power FPGA. The four externally acquired analog signals are conditioned and then sent to the AD chip to complete the analog-to-digital signal conversion. The processing board includes a high-performance FPGA chip to perform signal filtering, frequency domain analysis, and signal feature extraction. The interface board includes a system-on-a-chip (SoC) chip that integrates an ARM processor and FPGA logic.

2. The stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1, characterized in that: The AD board completes data acquisition and preprocessing of 1 to 4 AD signals. The data is transmitted to the processing board through the interconnected XMC connector. The processing board implements the signal processing algorithm, and the processed data is transmitted to the interface board through the XMC connector. The interface board sends the processed reported data to the terminal for display in the specified format. Control commands sent from the terminal to the system are parsed through the interface board's network interface and then distributed to the AD board and processing board respectively through the XMC interface.

3. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: All three types of printed circuit boards are 100mm × 70mm in size, and the mounting holes are in the same position.

4. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: Signal transmission between the AD board, processing board, and interface board uses socket XMC-0619-03Z and matching plug XMC-0619-10T.

5. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: The AD board's power interface, debugging interface, clock input, and data acquisition input interface use bent connectors, with the connecting cable accessed from the side of the printed circuit board; the AD board's heat dissipation components are arranged on the bottom surface of the printed circuit board.

6. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: The power and debugging interfaces of the processing board use bent connectors, and the connecting cable is connected from the side of the printed circuit board. The XMC socket is located on the bottom of the printed circuit board and connects to the XMC plug of the AD board for data exchange.

7. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: The XMC socket of the interface board is located on the bottom surface of the printed circuit board and connects to the XMC plug of the processing board for data exchange.

8. A stacked printed circuit board for a signal processing system of electronic countermeasures equipment according to claim 1 or 2, characterized in that: The interface board includes a power interface, a debugging interface, a network interface, and a reserved test interface, which are used to realize external data transmission and receive control commands.

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