High-speed isolation digital transmission system with strong anti-interference performance

Abstract

The utility model provides a high-speed isolation digital transmission system with strong anti-interference performance. The high-speed isolation digital transmission system comprises a primary side, a millimeter wave isolation device and a secondary side which are connected in sequence, the primary side comprises a power supply input end, a central control unit, a switching control unit and an energy storage device; the power supply input end, the central control unit, the switching control unit and the millimeter wave isolation device are connected in sequence; the energy storage device is connected with the switching control unit, the power supply input end and the millimeter wave isolation device. According to the utility model, the transmission efficiency is higher, safer and more reliable, and the anti-interference performance is high.

Description

Technical Field

[0001] The utility model relates to the technical field of data transmission, in particular to a high-speed isolated digital transmission system with strong anti-interference performance. Background Art

[0002] In many environments, signals must be transmitted between different sources and the circuitry that uses the signals, while maintaining electrical isolation between the different sources and the circuitry that uses the signals. Electrical isolation prevents extraneous transient signals, including common-mode transients, from being inadvertently processed as status or control information. In addition, among other known purposes and uses, electrical isolation is also used to protect equipment from electric shock hazards or to allow devices on both sides of the isolation barrier to operate at different supply voltages. For example, isolation is often required between a microcontroller and a device or transducer that uses the microcontroller's output signal.

[0003] Traditional electrical isolation methods usually use transformer (or coil) based isolators. For example, the primary winding and the secondary winding are coupled via inductance. However, the working principle of a conventional transformer is to transmit pulses to the power supply voltage by switching one terminal of the inductor between on and off. Therefore, in a conventional transformer, the signal current is a component of the power supply current, and the electromagnetic interference to the power supply voltage is serious, which will affect the signal transmission. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-speed isolated digital transmission system with strong anti-interference performance, which has higher, safer and more reliable transmission efficiency and strong anti-interference performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A high-speed isolated digital transmission system with strong anti-interference performance, including a primary side, a millimeter-wave isolation device, and a secondary side connected in sequence;

[0007] The primary side includes a power input terminal, a central control unit, a switching control unit and an energy storage device; the power input terminal, the central control unit, the switching control unit and the millimeter wave isolation device are connected in sequence; the energy storage device is respectively connected to the switching control unit, the power input terminal and the millimeter wave isolation device.

[0008] In some embodiments, the switching control unit includes a switch SS; the central control unit is connected to the power input terminal, the energy storage device and the millimeter wave isolation device respectively via the switch SS.

[0009] In some embodiments, the switching control unit includes a switch S1 and a switch S2; the moving end of the switch S1 is connected to the energy storage device, and the two fixed ends of the switch S1 are connected to the power input end and the central control unit one by one; the moving end of the switch S1 is also connected to the millimeter wave isolation device via the switch S2.

[0010] In some embodiments, the switching control unit includes a switch S1a, a switch S1b, a switch S2a and a switch S2b; the moving end of the switch S1a is connected to a fixed end of the switch S1b, and the two fixed ends of the switch S1a are respectively connected to the central control unit and the power input end; the moving end of the switch S1b is connected to the power input end, and the other fixed end of the switch S1b is connected to the central control unit; the moving end of the switch S1a is also connected to the millimeter wave isolation device via the switch S2a; the fixed end of the switch S1b connected to the moving end of the switch S1a is also connected to the millimeter wave isolation device via the switch S2b.

[0011] In some embodiments, the switching control unit further includes a resistor R1, a resistor R2 and a capacitor C1; the fixed end of the switch S1a is connected to the power input end via the resistor R1; the moving end of the switch S1b is connected to the power input end via the resistor R2; the moving end of the switch S1a is connected to a fixed end of the switch S1b via the capacitor C1.

[0012] In some embodiments, an RC filter is further included; the power input terminal is connected to the central control unit via the RC filter.

[0013] In some embodiments, the RC filter includes a resistor R3, a resistor R4 and a capacitor C2 connected in sequence; the two ends of the resistor R3 are also connected to the positive pole of the power input terminal and the central control unit respectively; the two ends of the resistor R4 are also connected to the negative pole of the power input terminal and the central control unit respectively.

[0014] In some embodiments, the millimeter wave isolation device includes a millimeter wave transmitting unit and a millimeter wave receiving unit; the millimeter wave transmitting unit and the millimeter wave receiving unit both include a digital-to-analog converter, a baseband amplifier, a mixer, a phase-locked loop, a power amplifier, a filter and a millimeter wave antenna; the digital-to-analog converter, baseband amplifier, mixer, power amplifier, filter and millimeter wave antenna are connected in sequence, and the phase-locked loop is connected to the mixer.

[0015] In some embodiments, the millimeter wave antenna in the millimeter wave transmitting unit is a millimeter wave transmitting antenna; the millimeter wave antenna in the millimeter wave receiving unit is a millimeter wave receiving antenna.

[0016] In some embodiments, the secondary side further includes an output unit; the output unit is connected to the millimeter wave isolation device.

[0017] The beneficial effects of the present invention are as follows: First, the transmission system of the present invention adopts millimeter wave isolation digital isolation for electrical isolation. Compared with the traditional isolation method, the transmission based on millimeter wave isolation has the advantages of faster speed, higher efficiency and smaller delay; at the same time, the millimeter wave isolation device is smaller in size, can simplify the overall structure, support chip embedded packaging, and is safer and more reliable. Secondly, a central control unit, a switching control unit and an energy storage device are provided on the primary side to realize that the power supply voltage is stored in the energy storage device and then transmitted to the millimeter wave isolation device, rather than directly entering the millimeter wave isolation device, so as to specifically solve the problem that the short-distance transmission of millimeter waves as carriers may cause electromagnetic interference to the power supply voltage, significantly improve EMI immunity, and ensure that the signal transmission is more stable, safer and more reliable. Thereby, a high-speed isolated digital transmission system with strong anti-interference performance is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a high-speed isolated digital transmission system with strong anti-interference performance provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the overall structure of a high-speed isolated digital transmission system with strong anti-interference performance provided by the first specific implementation method of the utility model;

[0020] Figure 3 A schematic diagram of the overall structure of a high-speed isolated digital transmission system with strong anti-interference performance provided by the second specific implementation method of the utility model;

[0021] Figure 4 A schematic diagram of the overall structure of a high-speed isolated digital transmission system with strong anti-interference performance provided by the third specific implementation method of the utility model;

[0022] Figure 5 The overall structural diagram of the high-speed isolated digital transmission system with strong anti-interference performance provided by the specific implementation method of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of the millimeter wave isolation device in a specific implementation manner of the utility model.

[0024] Description of labels:

[0025] 100, primary side; 200, millimeter wave isolation device; 300, secondary side;

[0026] 1. Power input terminal; 2. Central control unit; 3. Switching control unit; 4. Energy storage device;

[0027] 5. Output unit; 6. RC filter;

[0028] 201, millimeter wave transmitting unit; 202, millimeter wave receiving unit;

[0029] 2-1, digital-to-analog converter; 2-2, baseband amplifier; 2-3, mixer; 2-4, phase-locked loop;

[0030] 2-5. Power amplifier; 2-6. Filter; 2-7. Millimeter wave antenna. DETAILED DESCRIPTION

[0031] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0032] Please refer to Figure 1 , Figure 1 The overall structure diagram of the high-speed isolated digital transmission system with strong anti-interference performance provided by the embodiment of the utility model. Figure 1 As shown, this embodiment provides a high-speed isolated digital transmission system with strong anti-interference performance, including a primary side 100, a millimeter wave isolation device 200 and a secondary side 300 connected in sequence;

[0033] The primary side 100 includes a power input terminal 1, a central control unit 2, a switching control unit 3 and an energy storage device 4; the power input terminal 1, the central control unit 2, the switching control unit 3, and the millimeter wave isolation device 200 are connected in sequence; the energy storage device 4 is respectively connected to the switching control unit 3 and the power input terminal 1.

[0034] The secondary side 300 includes an output unit 5 ; the output unit 5 is connected to the millimeter wave isolation device 200 .

[0035] In this embodiment, the power input terminal 1 is used to provide a power source VCC.

[0036] The central control unit 2 is used to generate a control signal and transmit the control signal to the switching control unit to control whether the switching control unit is in energy storage mode or transmission mode. The control signal includes an energy storage control signal and a transmission control signal; the energy storage mode is that the energy storage device is connected to the power input terminal and the power supply VCC is stored in the energy storage device; the transmission module is that the energy storage device is connected to the millimeter wave isolation device and the energy stored in the energy storage device is transmitted to the secondary side via the millimeter wave isolation device.

[0037] The switching control unit 3 is used to control whether the energy storage mode or the transmission mode is in accordance with the received control signal, specifically, to control whether the energy storage device is connected to the power input terminal or to the millimeter wave isolation device.

[0038] The millimeter wave isolation device 200 is used to transmit the signal sent from the primary side to the secondary side based on millimeter wave wireless transmission.

[0039] In this embodiment, when the central control unit sends an energy storage control signal to the switching control unit, the switching control unit controls the energy storage mode, that is, controls the energy storage device to be connected to the power input terminal, and stores the power VCC of the power input terminal in the energy storage device; when the central control unit sends a transmission control signal to the switching control unit, the switching control unit controls the transmission mode, that is, controls the energy storage device to be connected to the millimeter wave isolation device, and sends the energy stored in the energy storage device to the millimeter wave isolation device; the millimeter wave isolation device transmits the received energy to the secondary side based on millimeter wave wireless transmission.

[0040] In this embodiment, firstly, the transmission system of the utility model adopts millimeter wave isolation digital isolation method for electrical isolation. Compared with the traditional isolation method, the transmission based on millimeter wave isolation has the advantages of faster, more efficient, smaller delay, etc. At the same time, the millimeter wave isolation device is smaller in size, can simplify the overall structure, support chip embedded packaging, and is safer and more reliable. Secondly, a central control unit, a switching control unit and an energy storage device are provided on the primary side to realize that the power supply voltage is stored in the energy storage device and then transmitted to the millimeter wave isolation device, rather than directly entering the millimeter wave isolation device, so as to specifically solve the problem that the short-distance transmission of millimeter waves as carriers may cause electromagnetic interference to the power supply voltage, significantly improve EMI immunity, and ensure that the signal transmission is more stable, safer and more reliable. Thereby, a high-speed isolated digital transmission system with strong anti-interference performance is realized.

[0041] Please refer to Figures 2 to 4 , this embodiment is based on Figure 1 The embodiment is further expanded, and the switching control unit is further refined to provide a variety of feasible specific implementation methods.

[0042] In a first specific embodiment, Figure 2 As shown, the switching control unit includes a switch SS; the central control unit is connected to the power input terminal, the energy storage device and the millimeter wave isolation device respectively via the switch SS.

[0043] Specifically, if Figure 2As shown, the fixed end of the switch SS is connected to the energy storage device 4 (indicated by C1 in the figure), and the moving end of the switch SS is connected to the power input terminal 1 or the millimeter wave isolation device 200; the control signal can be set to be an energy storage control signal when it is at a high level, and the switch SS is connected to the power input terminal 1, and the control signal can be set to be a transmission control signal when it is at a low level, and the switch SS is connected to the millimeter wave isolation device 200; or the control signal can be set to be a transmission control signal when it is at a high level, and the switch SS is connected to the millimeter wave isolation device 200, and the control signal can be set to be an energy storage control signal when it is at a low level, and the switch SS is connected to the power input terminal 1.

[0044] In the above specific implementation manner, if the central control unit sends an energy storage control signal, the moving end of the switch SS is not connected to the millimeter wave isolation device, and the moving end of the switch SS is connected to the power input end, so as to connect the power input end and the energy storage device, and the system is in energy storage mode, and the power supply VCC is stored in the energy storage device; if the central control unit sends a transmission control signal, the moving end of the switch SS is connected to the millimeter wave isolation device, and the moving end of the switch SS is disconnected from the power input end, so as to connect the energy storage device and the millimeter wave isolation device, and the system is in transmission mode, and the energy stored in the energy storage device is transmitted to the millimeter wave isolation device, and then transmitted to the secondary side in the form of a millimeter wave carrier.

[0045] In the above specific implementation, the switching control unit only needs to be configured with one switch element to achieve the required logic control, which not only simplifies the control logic and is easy to implement, but also reduces the cost.

[0046] In a second specific embodiment, Figure 3 As shown, the switching control unit includes a switch S1 and a switch S2; the moving end of the switch S1 is connected to the energy storage device 4, one fixed end of the switch S1 is connected to the power input terminal 1, and the other fixed end is connected to the central control unit 2; the moving end of the switch S1 is also connected to the millimeter wave isolation device 200 via the switch S2.

[0047] In the above specific implementation manner, if the central control unit sends an energy storage control signal, the switch S2 is disconnected, and at the same time, the moving end of the switch S1 is connected to the fixed end connected to the power input end, so as to connect the power input end and the energy storage device, and the system is in the energy storage mode, and the power supply VCC is stored in the energy storage device; if the central control unit sends a transmission control signal, the switch S2 is turned on, and at the same time, the moving end of the switch S1 is disconnected from the fixed end connected to the power input end, so as to connect the energy storage device and the millimeter wave isolation device, and the system is in the transmission mode, and the energy stored in the energy storage device is transmitted to the millimeter wave isolation device, and then transmitted to the secondary side in the form of a millimeter wave carrier.

[0048] In the above specific implementation, by setting the switching control unit to include switch S1 and switch S2, only two switches need to be configured to implement the required control logic, which also has the advantages of relatively simple control logic, relatively easy implementation, less number of switches required, and cost-effectiveness.

[0049] In a third specific embodiment, Figure 4 As shown, the switching control unit includes a switch S1a, a switch S1b, a switch S2a and a switch S2b; the moving end of the switch S1a is connected to a fixed end of the switch S1b, and the two fixed ends of the switch S1a are respectively connected to the central control unit 2 and the power input terminal 1; the moving end of the switch S1b is connected to the power input terminal 1, and the other fixed end of the switch S1b is connected to the central control unit 2; the moving end of the switch S1a is also connected to the millimeter wave isolation device 200 via the switch S2a; the fixed end of the switch S1b connected to the moving end of the switch S1a is also connected to the millimeter wave isolation device 200 via the switch S2b.

[0050] In the above specific implementation, if the central control unit sends an energy storage control signal, the switch S2a and the switch S2b are disconnected, and at the same time, the moving end of the switch S1a is connected to the fixed end connected to the power input end, and the moving end of the switch S1b is connected to the fixed end of the switch S1a, so that the power input end and the energy storage device are connected, and the system is in the energy storage mode, and the power supply VCC is stored in the energy storage device; if the central control unit sends a transmission control signal, the switch S2a and the switch S2b are turned on, and at the same time, the moving end of the switch S1a is disconnected from the fixed end connected to the power input end, and the switch S1b does not operate, so that the energy storage device and the millimeter wave isolation device are connected, and the system is in the transmission mode, and the energy stored in the energy storage device is transmitted to the millimeter wave isolation device, and then transmitted to the secondary side in the form of a millimeter wave carrier.

[0051] In the above specific implementation, by setting the switching control unit to include switch S1a, switch S1b, switch S2a and switch S2b, not only accurate control can be achieved, but also it is not easily disturbed and has high reliability.

[0052] In the various feasible specific implementations described above, some filtering components may also be provided in the switching control unit to filter out interference that may be generated in the circuit, thereby further improving the EMI resistance of the system.

[0053] The following is an explanation using the third specific implementation method as an example: Figure 4As shown, the switching control unit also includes a resistor R1, a resistor R2 and a capacitor C1; the fixed end of the switch S1a is connected to the power input end via the resistor R1; the moving end of the switch S1b is connected to the power input end via the resistor R2; the moving end of the switch S1a is connected to a fixed end of the switch S1b via the capacitor C1.

[0054] In each of the above specific implementations, the switching control unit may also be provided with an amplifier, a current source and other electrical coupling components to improve the overall adaptability of the circuit and better adapt to various circuit scenarios.

[0055] In the above specific embodiments, the switch may be a mechanical switch, a relay or an electronic switch. Preferably, the switch is a relay having at least two pairs of normally open contacts.

[0056] Please refer to Figure 5 This embodiment is further expanded based on the above embodiments to further improve the stability of the power input terminal.

[0057] In this embodiment, the high-speed isolated digital transmission system further includes an RC filter 6 ; the power input terminal 1 is connected to the central control unit 2 via the RC filter 6 .

[0058] In this embodiment, an RC filter is provided at the power input end to ensure that the power is transmitted to the central control unit for power supply after RC filtering, thereby effectively filtering out charge spikes and / or other EMI-related effects in the power supply VCC, thereby improving the overall anti-interference performance of the system.

[0059] In some specific embodiments, Figures 2 to 4 As shown, the RC filter includes a resistor R3, a resistor R4 and a capacitor C2 connected in sequence; the two ends of the resistor R3 are also respectively connected to the positive electrode of the power input terminal 1 and the central control unit 2; the two ends of the resistor R4 are also respectively connected to the negative electrode of the power input terminal 1 and the central control unit 2. The above RC filter has the characteristics of simple structure and outstanding filtering effect.

[0060] Please refer to Figure 6 This embodiment is further expanded based on the above embodiments and further refines the structure of the millimeter wave isolation device.

[0061] In this embodiment, if Figure 6As shown, the millimeter wave isolation device 200 includes a millimeter wave transmitting unit 201 and a millimeter wave receiving unit 202; the millimeter wave transmitting unit 201 and the millimeter wave receiving unit 202 both include a digital-to-analog converter 2-1, a baseband amplifier 2-2, a mixer 2-3, a phase-locked loop 2-4, a power amplifier 2-5, a filter 2-6 and a millimeter wave antenna 2-7; the digital-to-analog converter 2-1, the baseband amplifier 2-2, the mixer 2-3, the power amplifier 2-5, the filter 2-6 and the millimeter wave antenna 2-7 are connected in sequence, and the phase-locked loop 2-4 is connected to the mixer 2-3.

[0062] Specifically, the millimeter wave transmitting unit includes a first digital-to-analog converter, a first baseband amplifier, a first mixer, a first phase-locked loop, a first power amplifier, a first filter, and a millimeter wave transmitting antenna;

[0063] The millimeter wave receiving unit includes a millimeter wave receiving antenna, a second filter, a second power amplifier, a second mixer, a second phase-locked loop, a second baseband amplifier and a second analog-to-digital converter;

[0064] Among them, the input end of the first digital-to-analog converter of the millimeter wave transmitting unit is connected to the switching control unit, the output end is connected to the input end of the first baseband filter, the output of the first baseband filter is connected to the first input end of the first mixer; the second input end of the first mixer is connected to the output end of the first phase-locked loop; the output end of the first mixer is connected to the input end of the first power amplifier; the output end of the first power amplifier is connected to the input end of the first filter; the output end of the first filter is connected to the millimeter wave transmitting antenna.

[0065] Among them, the output end of the millimeter wave receiving antenna of the millimeter wave receiving unit is connected to the input end of the second filter, and the output end of the second filter is connected to the input end of the second power amplifier; the output end of the second power amplifier is connected to the first input end of the second mixer; the second input end of the second mixer is connected to the output end of the second phase-locked loop, and the output end of the second mixer is connected to the input end of the second baseband filter; the output end of the second baseband filter is connected to the input end of the second analog-to-digital converter; and the output end of the second analog-to-digital converter is connected to the input end of the output unit on the secondary side.

[0066] In this embodiment, when the system is in transmission mode, the signal reaches the millimeter wave transmitting unit, and is first converted from digital to analog through a digital-to-analog converter, then the signal is amplified, then frequency mixing and phase locking are performed, then power amplification is performed, and then filtering is performed, and finally the signal is transmitted through the millimeter wave antenna; the millimeter wave receiving antenna receives the signal from the millimeter wave transmission, filters, then power amplifies, then frequency mixing and phase locking is performed, then signal amplification is performed, and then analog-to-digital conversion is performed into a digital signal, and finally the digital signal is output to the output unit.

[0067] The millimeter wave isolation device of this embodiment can be realized by a millimeter wave isolator chip with an embedded antenna, so that the transmission is safer and more reliable. At the same time, it supports integrated single-chip solutions, which can make the system peripheral circuits simpler, with fewer components and more convenient circuit design. In addition, it supports a variety of standard packaging processes and has a low-cost competitive advantage. Most importantly, the utility model is based on millimeter wave isolation transmission and also has the characteristics of high transmission speed, low delay and high efficiency.

[0068] In particular, the electromagnetic interference that may be brought to the power supply voltage by the short-distance transmission characteristics of millimeter-wave isolated transmission will be solved on the primary side through the power input terminal, central control unit, switching control unit and energy storage device in the form of energy storage transmission rather than direct transmission of the power supply voltage, so that the whole system also has good EMI interference resistance.

[0069] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A high-speed isolated digital transmission system with strong anti-interference performance, characterized in that: It includes a primary side, a millimeter wave isolation device and a secondary side connected in sequence; The primary side includes a power input terminal, a central control unit, a switching control unit and an energy storage device; the power input terminal, the central control unit, the switching control unit and the millimeter wave isolation device are connected in sequence; the energy storage device is respectively connected to the switching control unit, the power input terminal and the millimeter wave isolation device.

2. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: The switching control unit includes a switch SS; the central control unit is connected to the power input terminal, the energy storage device and the millimeter wave isolation device respectively via the switch SS.

3. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: The switching control unit includes a switch S1 and a switch S2; the moving end of the switch S1 is connected to the energy storage device, and the two fixed ends of the switch S1 are connected to the power input end and the central control unit in a one-to-one correspondence; the moving end of the switch S1 is also connected to the millimeter wave isolation device via the switch S2.

4. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: The switching control unit includes a switch S1a, a switch S1b, a switch S2a and a switch S2b; the moving end of the switch S1a is connected to a fixed end of the switch S1b, and the two fixed ends of the switch S1a are respectively connected to the central control unit and the power input end; the moving end of the switch S1b is connected to the power input end, and the other fixed end of the switch S1b is connected to the central control unit; the moving end of the switch S1a is also connected to the millimeter wave isolation device via the switch S2a; the fixed end of the switch S1b connected to the moving end of the switch S1a is also connected to the millimeter wave isolation device via the switch S2b.

5. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 4, characterized in that: The switching control unit also includes a resistor R1, a resistor R2 and a capacitor C1; the fixed end of the switch S1a is connected to the power input end via the resistor R1; the moving end of the switch S1b is connected to the power input end via the resistor R2; the moving end of the switch S1a is connected to a fixed end of the switch S1b via the capacitor C1.

6. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: It also includes an RC filter; the power input end is connected to the central control unit via the RC filter.

7. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 6, characterized in that: The RC filter includes a resistor R3, a resistor R4 and a capacitor C2 connected in sequence; the two ends of the resistor R3 are also connected to the positive pole of the power input end and the central control unit respectively; the two ends of the resistor R4 are also connected to the negative pole of the power input end and the central control unit respectively.

8. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: The millimeter wave isolation device includes a millimeter wave transmitting unit and a millimeter wave receiving unit; the millimeter wave transmitting unit and the millimeter wave receiving unit both include a digital-to-analog converter, a baseband amplifier, a mixer, a phase-locked loop, a power amplifier, a filter and a millimeter wave antenna; the digital-to-analog converter, baseband amplifier, mixer, power amplifier, filter and millimeter wave antenna are connected in sequence, and the phase-locked loop is connected to the mixer.

9. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 8, characterized in that: The millimeter wave antenna in the millimeter wave transmitting unit is a millimeter wave transmitting antenna; the millimeter wave antenna in the millimeter wave receiving unit is a millimeter wave receiving antenna.

10. The high-speed isolated digital transmission system with strong anti-interference performance as claimed in claim 1, characterized in that: The secondary side also includes an output unit; the output unit is connected to the millimeter wave isolation device.

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