A microwave radio universal communication and control function circuit

Abstract

The utility model relates to the field of microwave radio frequency technology, specifically provides a kind of microwave radio frequency general communication and control function circuit, including main control module, DC-DC conversion power module, LDO voltage stabilizing module, Ethernet module, RS422 serial module, USB module, the main control module uses a single-chip microcomputer chip U1, the LDO voltage stabilizing module includes internal voltage stabilizing unit and external voltage stabilizing unit;The utility model is integrated by the module design, realizes the high degree of unification of power management, multi-protocol communication and main control logic, with powerful universality and expandability, can significantly shorten development cycle, reduce research and development and material cost, and provide stable, low-noise power output and comprehensive communication function, while through filter and anti-static design enhances system stability and durability, can be flexibly adapted to the control and communication needs of multiple microwave radio frequency equipment.

Description

Technical Field

[0001] This utility model relates to the field of microwave radio frequency technology, specifically to a general-purpose microwave radio frequency communication and control functional circuit. Background Technology

[0002] In the field of microwave and radio frequency technology, modules or devices such as radio frequency signal sources, attenuators, switching matrices, phase shifters, and adjustable amplifiers all rely on stable and reliable control and communication function circuits for normal operation. In such circuits, the performance of the power supply and communication module is crucial, directly determining the performance and reliability of the entire device.

[0003] However, existing technologies have significant shortcomings in circuit design, specifically as follows: 1. Existing designs often use independent switching DC-DC converters for voltage conversion in pursuit of conversion efficiency. However, the inherent switching noise of DC-DC converters will inevitably couple to the power network, forming a source of interference. There is a contradiction between efficiency and noise, which restricts the improvement of the overall performance of the RF system.

[0004] 2. Since microwave radio frequency equipment is often deployed in complex electromagnetic environments, existing solutions typically place a small number of bypass capacitors or decoupling capacitors near the power input terminal and the power pins of the chip to filter out power supply noise. However, a small number of bypass capacitors or decoupling capacitors can only filter out noise in specific frequency bands, and the anti-interference capability of microwave radio frequency equipment in harsh electromagnetic environments is still poor. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a general-purpose microwave radio frequency communication and control function circuit to solve the problem of the contradiction between efficiency and noise in voltage conversion using an independent switching DC-DC converter in the prior art, as well as the problem of poor anti-interference capability of microwave radio frequency equipment in harsh electromagnetic environments.

[0006] To achieve the above and other related objectives, this utility model provides a microwave radio frequency universal communication and control function circuit, the circuit comprising: DC-DC converter power module, wherein the DC-DC converter power module adopts a DC-DC buck converter chip U2; The LDO voltage regulator module includes an internal voltage regulator unit and an external voltage regulator unit. The internal voltage regulator unit uses LDO voltage regulator chip N1 and LDO voltage regulator chip N2, and the external voltage regulator unit uses LDO voltage regulator chip N3, LDO voltage regulator chip N4 and LDO voltage regulator chip N5. The main control module uses a single-chip microcomputer U1. Ethernet module, wherein the Ethernet module uses a communication chip U4; The RS422 serial port module uses a communication device U5. The USB module uses a communication interface USB1 and a communication protocol to single-ended serial port chip U16. The DC-DC converter power supply module is connected to the LDO voltage regulator module, the LDO voltage regulator module is connected to the main control module, and the main control module is also connected to the Ethernet module, RS422 serial port module, and USB module.

[0007] In one embodiment of this utility model, the DC-DC converter power supply module further includes filter capacitors C1, C3, and C4, power inductor L1, C13, resistors R3 and R4, filter capacitors C11, C12, and C9, power inductor L2, and C10. Filter capacitors C1, C3, and C4 are connected in parallel at the input terminal of the DC-DC buck converter chip U2 for filtering the input current. Power inductor L1, filter capacitor C13, resistors R3 and R4, filter capacitors C11, C12, and C9, power inductor L2, and C10 are also connected in parallel at the input terminal of the DC-DC buck converter chip U2 for multi-stage shaping and filtering of the input current.

[0008] In one embodiment of the present invention, the internal voltage regulation unit of the LDO voltage regulator module includes two voltage regulation lines, and the LDO voltage regulator chip N1 and the LDO voltage regulator chip N2 are respectively disposed on the two voltage regulation lines. The LDO regulator chip N1 has capacitors C24 and C25 connected in parallel on its input pins, and capacitors C20, C23, inductor L4, and inductor L5 connected in parallel on its output pins. The LDO regulator chip N2 has capacitors C31 and C32 connected in parallel on its input pins, and capacitors C35 and C30 connected in parallel on its output pins.

[0009] In one embodiment of the present invention, the external voltage regulation unit of the LDO voltage regulator module includes three voltage regulation lines, and LDO voltage regulator chip N3, LDO voltage regulator chip N4 and LDO voltage regulator chip N5 are respectively disposed on the three voltage regulation lines; The LDO regulator chip N3 has capacitors C17 and C19 connected in parallel on its input pins, and capacitors C20 and C16 connected in parallel on its output pins. The output pins of the LDO regulator chip N4 are connected in parallel with capacitors C45 and C21. The LDO regulator chip N5 has capacitors C47 and C48 connected in parallel on its input pins, and capacitors C49 and C46 connected in parallel on its output pins.

[0010] In one embodiment of this utility model, the communication chip U4 is connected to capacitors C38 and C39, LED D1 and LED D2. LED D1 is used to flash to display Ethernet transmission data, and LED D2 is used to indicate the power supply information of the USB module.

[0011] In one embodiment of this utility model, capacitors C36 and C37 are connected in parallel on the VCC pin of the communication device U5 for filtering the power supply.

[0012] In one embodiment of the present invention, the USB module further includes an anti-static filter inductor L6, which is connected to the communication interface USB1.

[0013] As described above, the microwave radio frequency universal communication and control functional circuit of this utility model has the following beneficial effects: This invention incorporates a DC-DC converter power supply module and multiple independent LDO voltage regulator modules. The DC-DC converter power supply module first efficiently converts the externally input voltage, handling most of the voltage drop power consumption and ensuring overall power efficiency. Subsequently, the multiple independent LDO voltage regulator modules perform secondary precise voltage regulation and filtering on the converted voltage, enabling the output voltage with extremely low ripple and excellent noise characteristics. This solution combines the high efficiency of DC-DC converters with the low noise and high power supply rejection ratio of LDOs, effectively resolving the contradiction between efficiency and noise in traditional solutions. It provides "clean" energy for microwave RF core chips, fundamentally ensuring the purity of RF signals and the stability of system performance.

[0014] This invention employs a multi-stage π-type filter network, consisting of a power inductor and multiple parallel filter capacitors, in both the DC-DC converter power module and the multi-channel LDO voltage regulator module along the power path. This network effectively suppresses and shapes power supply noise, improving power quality and immunity to internal noise. Furthermore, this invention innovatively integrates an anti-static filter inductor L6 at the USB interface, which is susceptible to external interference. The L6 not only filters out high-frequency common-mode noise but also absorbs and discharges electrostatic pulses, forming the first line of defense for protecting subsequent precision communication chips and the main control chip. Through these filtering and anti-static designs throughout the power and signal paths, this invention significantly enhances the system's anti-interference capability in harsh electromagnetic environments and its resistance to electrostatic damage under frequent plugging and unplugging operations, thereby extending the equipment's lifespan and enhancing the product's market competitiveness. Attached Figure Description

[0015] Figure 1 The diagram shown is an application block diagram of this utility model.

[0016] Figure 2 The diagram shown is a circuit schematic of the DC-DC converter power supply module of this utility model.

[0017] Figure 3 The diagram shown is a schematic of the internal voltage regulation unit circuit of the LDO voltage regulator module in this utility model.

[0018] Figure 4 The diagram shown is a circuit diagram of the external voltage regulator unit of the LDO voltage regulator module in this utility model.

[0019] Figure 5 The diagram shown is a circuit schematic of the main control module in this utility model.

[0020] Figure 6 The diagram shows the schematic of the external control standard interface circuit of the main control module in this utility model.

[0021] Figure 7 The diagram shown is a circuit schematic of the Ethernet module in this invention.

[0022] Figure 8 The diagram shown is a circuit schematic of the RS422 serial port module in this utility model.

[0023] Figure 9 The diagram shown is a circuit schematic of the USB module 6 in this utility model.

[0024] Component designation explanation Main control module 1; DC-DC converter power supply module 2; LDO voltage regulator module 3; internal voltage regulator unit 31; external voltage regulator unit 32; Ethernet module 4; RS422 serial port module 5; USB module 6. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0026] Please see Figures 1 to 9It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model.

[0027] Please see Figures 1-9 This utility model provides a microwave radio frequency universal communication and control function circuit. The circuit includes a main control module 1, a DC-DC power conversion module 2, an LDO voltage regulator module 3, an Ethernet module 4, an RS422 serial port module 5, and a USB module 6. The LDO voltage regulator module 3 includes an internal voltage regulator unit 31 and an external voltage regulator unit 32. The input terminal of the DC-DC power conversion module 2 is connected to an external power supply, and the output terminal is connected to the LDO voltage regulator module 3. The internal voltage regulator unit 31 of the LDO voltage regulator module 3 is connected to the main control module 1. The main control module 1 is also connected to the Ethernet module 4, the RS422 serial port module 5, and the USB module 6. After the DC-DC power conversion module 2 is connected to a power source, it is regulated by the internal voltage regulator unit 31 of the LDO voltage regulator module 3 and used for internal power supply. The external voltage regulator unit 32 of the LDO voltage regulator module 3 is connected to external electronic devices for external power supply.

[0028] This invention incorporates a DC-DC converter power supply module 2 and multiple independent LDO voltage regulator modules 3. The DC-DC converter power supply module 2 first efficiently converts the externally input voltage, handling most of the voltage drop power consumption and ensuring overall power efficiency. Subsequently, the multiple independent LDO voltage regulator modules 3 perform secondary precise voltage regulation and filtering on the converted voltage, enabling the output voltage with extremely low ripple and excellent noise characteristics. This solution combines the high efficiency of DC-DC converters with the low noise and high power supply rejection ratio of LDOs, effectively resolving the contradiction between efficiency and noise in traditional solutions. It provides "clean" energy for microwave RF core chips, fundamentally ensuring the purity of RF signals and the stability of system performance.

[0029] Please see Figures 6-7The main control module 1, i.e., the MCU, uses a single-chip microcontroller U1. The U1 is a 32-bit chip, powered by an 8MHz crystal oscillator. JP1 is the standard logic loading port for the microcontroller. Power supply and pin configuration information are shown in the diagram above. The MCU is the core of the entire circuit's logic operation, internally programmed with logic according to functional requirements. It receives and sends external information according to pin definitions, while simultaneously controlling the normal operation of related devices. In practical use, the main control module 1 also employs an external control standard interface connected to the U1. This interface labels the pin functions of the U1 according to the chip's pin definitions and a standard 40-pin socket, facilitating logic development and verification. External connections are made directly according to the socket's correspondence, ensuring standardization and plug-and-play functionality.

[0030] Please see Figures 7-9 The Ethernet module 4 uses a communication chip U4. Capacitors C38 and C39, LED D1, and LED D2 are connected to the communication chip U4. Capacitors C38 and C39 are connected to the crystal oscillator, providing timing information for the 9120 Ethernet-to-RS422 serial port chip. Externally, capacitors C38 and C39 filter the VCC power supply. LED D1 is connected to the link pin of the communication chip U4, used for flashing to indicate that data is being transmitted via Ethernet. LED D2 is connected to the act pin of the communication chip U4, used for power supply information indication for the USB module 6. This invention uses capacitors C27 and C28 to configure an 8MHz crystal oscillator, which provides timing information for the Ethernet-to-RS422 serial port chip. Externally, capacitors C38 and C39 filter the VCC power supply. The RS422 serial port module 5 uses a communication device U5. Single-ended TX and RX serial communication is converted into four differential signals (A, B, Z, Y) via U5, providing fault tolerance and stability. It communicates with the outside world via differential RS422 communication. Capacitors C36 and C37 are connected in parallel on the VCC pin of communication device U5 for filtering the power supply. The USB module 6 uses a communication interface USB1 and a communication protocol to single-ended serial port chip U16. This module uses a standard USB Type-C interface. The communication protocol to single-ended serial port chip U16 performs protocol conversion, transmitting the converted single-ended serial port signal to the MCU, i.e., the main control module 1.

[0031] Under the scheduling of a single main control module 1, this utility model integrates three mainstream communication interfaces: Ethernet, differential RS422, and USB. Each communication module achieves protocol conversion through an independent chip, reducing signal crosstalk between different communication links, ensuring the integrity and reliability of data transmission, and meeting the diverse communication needs of complex systems. This allows a single circuit board to be adapted to various application scenarios such as networked control, long-distance anti-interference serial communication, or portable device debugging, greatly enhancing the versatility and applicability of the circuit.

[0032] The USB module 6 also includes an anti-static filter inductor L6, which is connected to the communication interface USB1 to prevent electrostatic pulses from damaging subsequent functional chips through the USB module 6. This invention innovatively integrates an anti-static filter inductor L6 at the USB interface, which is susceptible to external interference. The anti-static filter inductor L6 can filter out high-frequency common-mode noise and absorb and discharge electrostatic pulses, forming the first line of defense to protect the subsequent precision communication chips and main control chips.

[0033] Please see Figure 2 The DC-DC converter power module 2 includes a DC-DC buck converter chip U2, and a series of components including filter capacitors C1, C3, C4, power inductor L1, C13, resistors R3 and R4, filter capacitors C11, C12, C9, power inductor L2, and C10. Filter capacitors C1, C3, and C4 are connected in parallel at the input terminal of the DC-DC buck converter chip U2 to filter the input current. The power inductor L1, filter capacitor C13, resistors R3 and R4, and the power inductor L2 and C10 are also connected in parallel at the input terminal of the DC-DC buck converter chip U2. The input terminal is used for multi-stage shaping and filtering of the input current. Specifically, the external input DC +12V power supply is filtered by capacitors C1, C3, and C4 before being input to the DC-DC buck converter chip U2. After being shaped by power inductor L1 and filtered by capacitor C13, the output is configured by the voltage of resistors R3 and R4. The subsequent stage filters the output again through capacitors C11, C12, and C9, and after being shaped and filtered by power inductor L2 and capacitor C10, it outputs as DC +5.5V. This invention steps down DC +12V to +5.5V output. After multi-stage shaping and filtering, the output voltage is stable, with low noise and low ripple, providing a +5.5V power supply to the subsequent LDO regulator module 3 as the input power for the next stage.

[0034] Please see Figures 3-4The LDO voltage regulator module 3 includes an internal voltage regulator unit 31 and an external voltage regulator unit 32. The internal voltage regulator unit 31 uses LDO voltage regulator chips N1 and N2. Specifically, the internal voltage regulator unit 31 includes two voltage regulation lines, with LDO voltage regulator chips N1 and N2 respectively located on the two voltage regulation lines. Capacitors C24 and C25 are connected in parallel on the input pin of LDO voltage regulator chip N1, and capacitors C20, C23, inductor L4, and inductor L5 are connected in parallel on the output pin of LDO voltage regulator chip N1. In a specific implementation, the first DC +5.5V power supply input is filtered by capacitors C24 and C25 before being input to LDO voltage regulator chip N1. After being filtered by the capacitors at the positions of capacitors C20 and C23, and after noise is filtered by the ferrite beads L4 and L5, it is output as DC +3.3V. The above method steps down a DC +5.5V voltage to a +3.3V output. After capacitor filtering, the output voltage is stable, with low noise and low ripple, providing power to the functional devices on the circuit board. The LDO regulator chip N2 in the LDO regulator module 3 has capacitors C31 and C32 connected in parallel to its input pins, and capacitors C35 and C30 connected in parallel to its output pins. The second DC +5.5V power input, after being filtered by capacitors C31 and C32, is input to the LDO regulator chip N2, and then filtered again by capacitors C30 and C35 to output a DC +3.3V voltage. This invention steps down a DC +5.5V voltage to a +3.3V output, and after capacitor filtering, provides a stable, low-noise, and low-ripple +3.3V power supply to the functional devices on the circuit board.

[0035] The external voltage regulator unit 32 employs LDO regulator chips N3, N4, and N5. The external voltage regulator unit 32 includes three voltage regulation lines, with LDO regulator chips N3, N4, and N5 respectively located on these three lines. Capacitors C17 and C19 are connected in parallel to the input pin of LDO regulator chip N3, and capacitors C20 and C16 are connected in parallel to its output pin. Capacitors C45 and C21 are connected in parallel to the output pin of LDO regulator chip N4. Capacitor C47 is connected in parallel to the input pin of LDO regulator chip N5. Along with capacitor C48, capacitors C49 and C46 are connected in parallel to the output pin of LDO regulator chip N5. Specifically, the three DC +5.5V power inputs are first filtered by capacitors C17, C19, C47, and C48 before being input to LDO regulator chip N1. They are then filtered by capacitors C20 and C23, and further filtered by the LDO regulator chips L4 and L5 with ferrite beads to remove noise before being output as DC +3.3V. This process steps down the DC +5.5V to +3.3V, and after filtering by multiple capacitors, the output voltage is stable, with low noise and low ripple, providing power to the functional devices on the circuit board.

[0036] This invention employs a multi-stage π-type filter network, consisting of a power inductor and multiple parallel filter capacitors, in both the DC-DC converter power module 2 and the multi-channel LDO voltage regulator module 3 along the power path. This network thoroughly suppresses and shapes power supply noise, improving power quality and immunity to internal noise. Through these filtering and anti-static designs throughout the power and signal paths, this invention significantly enhances the system's anti-interference capability in harsh electromagnetic environments and its resistance to electrostatic damage under frequent plugging and unplugging operations, thereby extending the equipment's lifespan and enhancing the product's market competitiveness.

[0037] In summary, this invention, through its integrated modular design, achieves a high degree of unification between power management, multi-protocol communication, and main control logic. It possesses strong versatility and scalability, significantly shortening the development cycle, reducing R&D and material costs, and providing stable, low-noise power output and comprehensive communication functions. Furthermore, filtering and anti-static design enhance system stability and durability, allowing for flexible adaptation to the control and communication needs of various microwave and radio frequency devices. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial application value.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A microwave radio frequency universal communication and control functional circuit, characterized in that, The circuit includes: DC-DC converter power module (2), wherein the DC-DC converter power module (2) adopts a DC-DC buck converter chip U2; LDO voltage regulator module (3), the LDO voltage regulator module (3) includes an internal voltage regulator unit (31) and an external voltage regulator unit (32). The internal voltage regulator unit (31) adopts LDO voltage regulator chip N1 and LDO voltage regulator chip N2, and the external voltage regulator unit (32) adopts LDO voltage regulator chip N3, LDO voltage regulator chip N4 and LDO voltage regulator chip N5. The main control module (1) adopts a single-chip microcomputer U1; Ethernet module (4), wherein the Ethernet module (4) adopts a communication chip U4; RS422 serial port module (5), wherein the RS422 serial port module (5) adopts a communication device U5; USB module (6), wherein the USB module (6) adopts a communication interface USB1 and a communication protocol to single-ended serial port chip U16; The DC-DC converter power supply module (2) is connected to the LDO voltage regulator module (3), the LDO voltage regulator module (3) is connected to the main control module (1), and the main control module (1) is simultaneously connected to the Ethernet module (4), the RS422 serial port module (5), and the USB module (6).

2. The microwave radio frequency universal communication and control functional circuit according to claim 1, characterized in that: The DC-DC converter power module (2) also includes filter capacitors C1, C3, C4, power inductor L1, C13, resistors R3 and R4, filter capacitors C11, C12, C9, power inductor L2, and C10. Filter capacitors C1, C3, and C4 are connected in parallel at the input terminal of the DC-DC buck converter chip U2 to filter the input current. Power inductor L1, C13, R3, R4, C11, C12, C9, L2, and C10 are connected in parallel at the input terminal of the DC-DC buck converter chip U2 to perform multi-stage shaping and filtering of the input current.

3. The microwave radio frequency universal communication and control function circuit according to claim 1, characterized in that: The internal voltage regulation unit (31) of the LDO voltage regulator module (3) includes two voltage regulation lines, and the LDO voltage regulator chip N1 and the LDO voltage regulator chip N2 are respectively located on the two voltage regulation lines; The LDO regulator chip N1 has capacitors C24 and C25 connected in parallel on its input pins, and capacitors C20, C23, inductor L4, and inductor L5 connected in parallel on its output pins. The LDO regulator chip N2 has capacitors C31 and C32 connected in parallel on its input pins, and capacitors C35 and C30 connected in parallel on its output pins.

4. The microwave radio frequency universal communication and control function circuit according to claim 1, characterized in that: The external voltage regulator unit (32) of the LDO voltage regulator module (3) includes three voltage regulator lines, and LDO voltage regulator chip N3, LDO voltage regulator chip N4 and LDO voltage regulator chip N5 are respectively located on the three voltage regulator lines. The LDO regulator chip N3 has capacitors C17 and C19 connected in parallel on its input pins, and capacitors C20 and C16 connected in parallel on its output pins. The output pins of the LDO regulator chip N4 are connected in parallel with capacitors C45 and C21. The LDO regulator chip N5 has capacitors C47 and C48 connected in parallel on its input pins, and capacitors C49 and C46 connected in parallel on its output pins.

5. The microwave radio frequency universal communication and control function circuit according to claim 1, characterized in that: The communication chip U4 is connected to capacitors C38 and C39, LED D1, and LED D2. LED D1 flashes to display the Ethernet transmission data; LED D2 is used to indicate the power supply information of the USB module.

6. The microwave radio frequency universal communication and control function circuit according to claim 1, characterized in that: The communication device U5 has capacitors C36 and C37 connected in parallel on its VCC pin for filtering the power supply.

7. The microwave radio frequency universal communication and control function circuit according to claim 1, characterized in that: The USB module (6) also includes an anti-static filter inductor L6, which is connected to the communication interface USB1.

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