Medical endoscope connector

Abstract

The utility model discloses a medical endoscope connector, which relates to the image transmission technology of an endoscope, and comprises an automatic level control module and a millimeter wave transmitting module which are arranged in an endoscope body, and a millimeter wave receiving module arranged in an endoscope host, and the millimeter wave transmitting module and the millimeter wave receiving module realize information interaction in a wireless communication mode. The automatic level control module is connected with the millimeter wave transmitting module and used for adjusting the level value of an image signal output by a camera of the endoscope body to be within a set threshold range and then outputting the image signal to the millimeter wave transmitting module. When in use, physical damage caused by disinfection and plugging can be avoided, real-time lossless transmission of image data is supported, and signal characteristics of different endoscope sensors can be adaptively adapted.

Description

TECHNICAL FIELD

[0001] The utility model relates to endoscope's image transmission technology, concretely is a medical endoscope connector. BACKGROUND

[0002] As the core tool of modern minimally invasive diagnosis and treatment, the stability, real-time performance and definition of the image transmission of the medical endoscope have substantial influence on the performance of the endoscope. The endoscope realizes data transmission between the scope (including the camera) and the host through the connector. In specific application, the endoscope scope with the camera shoots the image in the human body, which is transmitted to the endoscope host through the connector, and displayed on the display after processing by the host. The connector of the existing endoscope generally adopts the wired transmission mode (the mainstream technology adopts two ways of electrical signal transmission or optical signal transmission), the scope and the scope side of the connector constitute a complete scope device, the host and the host side of the connector constitute a complete host device, and the scope device is connected with the host device when in use. When the transmission mode of electrical signal is adopted, the following problems exist:

[0003] (1) Contact reliability problem: the electrical connector relies on metal contacts to transmit signals, and frequent plugging and unplugging can easily cause contact wear, which may cause poor contact or signal loss after long-term use.

[0004] (2) Poor environmental tolerance: the endoscope needs to be repeatedly sterilized at high temperature and high pressure or cleaned by liquid immersion, and moisture residue can easily cause contact oxidation, short circuit, and even equipment failure.

[0005] (3) Bandwidth bottleneck: with the development of endoscope imaging technology towards 4K / 8K ultra-high definition, multi-spectrum fusion and other directions, the transmission rate of traditional electrical interface is difficult to meet the real-time transmission demand of high-resolution images.

[0006] When the transmission mode of optical signal is adopted, the following problems exist:

[0007] (1) Strict alignment accuracy requirement: the optical connector needs to keep the accurate angle alignment of the fiber end face, and slight vibration or dust pollution can cause light path deviation, signal attenuation or even interruption.

[0008] (2) High maintenance cost: the precise structure of the optical interface has very high requirement on the processing technology, and long-term plugging can easily cause end face scratch, so the performance needs to be maintained by frequently replacing accessories.

[0009] (3) Limited expandability: the bandwidth improvement space of single-channel optical transmission is limited, and the multiplexing technology (such as wavelength division multiplexing) is difficult to realize in the miniaturized endoscope connector.

[0010] To solve the above problems, the current optimization scheme in the industry (such as the invention patent application with the invention name of "an endoscope light guide connector, a light guide connection method and an endoscope device" disclosed on September 14, 2018, and the utility model patent application with the invention name of "self-adaptive matching connector and endoscope image processing system" disclosed on March 22, 2024) mainly focuses on the mechanical structure improvement of the physical interface, for example: through the rotatable light guide socket to adapt to different light sources; use elastic contact to improve the electrical connection accuracy; integrate the photoelectric hybrid interface to reduce the plug-in frequency. However, these schemes still rely on physical contact to transmit signals and cannot fundamentally solve the problems of disinfection damage, wear and tear, and insufficient bandwidth.

[0011] Currently, wireless communication technologies (such as Wi-Fi and Bluetooth) have been widely used in consumer electronics, but their transmission rate, anti-interference ability and power consumption cannot meet the stringent requirements of medical endoscopes in terms of high bandwidth (>10 Gbps), low delay (<1 ms) and low power (<10 mW). In recent years, the millimeter wave frequency band (30-300 GHz) has become an ideal choice for high-speed wireless transmission due to its ultra-large bandwidth and low delay characteristics, and it has gradually been popularized in endoscopes (such as the utility model patent with the invention name of "a connection device and an endoscope system" disclosed on December 23, 2022). However, the output levels of sensors of different endoscope types (such as gastroscopes, ultrasonic scopes and urinary scopes) differ significantly, and existing endoscopes using millimeter waves to achieve data transmission still have the problem of being unable to adapt across devices. Utility model content

[0012] The utility model aims to solve the problem of existing endoscopes using millimeter waves to achieve data transmission, which cannot adapt across devices, and provides a medical endoscope connector that can avoid physical damage caused by disinfection and plugging, support real-time lossless transmission of image data, and adapt to the signal characteristics of different endoscope sensors.

[0013] The utility model mainly achieves the purpose through the following technical solutions:

[0014] A medical endoscope connector, comprising an automatic level control module and a millimeter wave transmission module arranged in an endoscope body, and a millimeter wave receiving module arranged in an endoscope host, the millimeter wave transmission module and the millimeter wave receiving module realize information interaction through wireless communication mode; the automatic level control module is connected with the millimeter wave transmission module, and is used to adjust the image signal level value output by the camera of the endoscope body to be within the set threshold range and then output to the millimeter wave transmission module.

[0015] With the development of wireless communication technology, especially the exploration of millimeter wave frequency band, it is found that millimeter wave has the characteristics of high bandwidth and low delay, therefore, the utility model adopts the wireless communication mode of micro-power millimeter wave to transmit high-speed image data, through the integration of millimeter wave transmitting module and millimeter wave receiving module, the cableless high-definition image transmission is realized. The utility model adopts the communication technology of micro-power millimeter wave, sets up millimeter wave transmitting module on the side of mirror body, sets up millimeter wave receiving module on the side of host computer. Because of the non-contact of wireless transmission, millimeter wave transmitting module and millimeter wave receiving module can be respectively built-in in the inside of connector mirror body side and host computer side, therefore, disinfection and cleaning will not bring the problems such as signal loss and contact failure to wireless module as telecommunication signal. Moreover, the receiving and transmitting antenna of wireless module also does not have the problem of strict angle alignment as optical signal, which greatly simplifies the process design of connector, and does not need to worry about the problem that the angle error of optical signal becomes larger and larger due to the material wear of interface caused by frequent use.

[0016] Any telecommunication signal module has the range requirement to input level, and millimeter wave wireless module is no exception. The image data photographed by camera is transmitted through a certain distance, and before entering millimeter wave transmitting module, its level value changes with the transmission distance and the difference of use environment. Because endoscope system is divided into gastroscopy, ultrasonic mirror, urinary mirror and the like, different mirrors have differences in camera sensor due to the difference of organs aimed at, and the light source and transmission path are also different, so the level value of camera sensor data reaching wireless module may be different, therefore, each mirror body needs to design attenuation circuit independently. The utility model proposes to increase automatic level control module in front of millimeter wave wireless module, so that the level entering millimeter wave transmitting module is kept in the allowable range of millimeter wave transmitting module, and the compatibility is increased.

[0017] Further, the automatic level control module comprises a voltage-controlled attenuator, a coupler, a rectifier, a filter and a comparator, the voltage-controlled attenuator is arranged on the line between the camera of the endoscope mirror body and the millimeter wave transmitting module, the coupler, the rectifier, the filter and the comparator are connected in sequence, the coupler couples the signal from the output end of the voltage-controlled attenuator for monitoring the output level of the voltage-controlled attenuator, the rectifier converts the high-frequency alternating current signal coupled by the coupler into pulsating direct current signal, the filter is used for filtering the high-frequency ripple after rectification and outputting smooth direct current level signal, the comparator compares the filtered direct current level with the preset reference voltage and generates control signal to drive the voltage-controlled attenuator, and the voltage-controlled attenuator receives the control signal sent by the comparator and adjusts the signal strength so that the output level is within the linear working range of the millimeter wave transmitting module. The utility model adopts the voltage-controlled attenuator to control the level of image data entering the millimeter wave transmitting module, avoiding the signal saturation caused by the too high level of image data entering the millimeter wave transmitting module, so as to reduce the image quality.

[0018] Further, when the comparator compares the filtered direct current level with the preset reference voltage, if the filtered direct current level is less than the preset reference voltage, a low level is output, the voltage-controlled attenuator keeps minimum attenuation to send the input signal to the millimeter wave transmitting module; if the filtered direct current level is greater than or equal to the preset reference voltage, a high level is output, the voltage-controlled attenuator increases the attenuation to reduce the output level to a set threshold range, and then outputs to the millimeter wave transmitting module.

[0019] In actual use, the demand for higher bandwidth is put forward due to the demand for improving resolution, pixel color depth and multi-sensor fusion imaging, and the single-channel transmission still has limited bandwidth. Further, the millimeter wave transmitting module and the millimeter wave receiving module are both provided with multiple antennas and have the same number of antennas, and the antennas of the two form a polarization orthogonal antenna array. The utility model adopts the mode of placing adjacent orthogonal polarization antennas, arranges multiple data channels in a compact space, improves the transmission bandwidth, and avoids crosstalk between different data channels.

[0020] Further, the polarization orthogonal antenna array adopts any one of horizontal polarization, vertical polarization, left-handed circular polarization and right-handed circular polarization or a combination of two or more polarization modes.

[0021] Further, the polarization orthogonal antenna array includes at least one pair of horizontally polarized and vertically polarized linearly polarized antennas arranged alternately, and at least one pair of left-handed circularly polarized and right-handed circularly polarized circularly polarized antennas arranged alternately.

[0022] Further, an electromagnetic bandgap structure or a defect ground structure is arranged between the linearly polarized antennas and the circularly polarized antennas.

[0023] Further, the axial ratio of the circularly polarized antenna is less than 3dB, and the inclination angle of the reflecting plate is 45°.

[0024] Further, the millimeter wave transmitting module in the endoscope body and the millimeter wave receiving module in the endoscope main machine are wrapped by potting glue.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] (1) The utility model adopts millimeter wave wireless transmission to replace wired connection, which can eliminate disinfection residues and wear caused by physical contact, and avoid high requirements of optical signals on angles.

[0027] (2) The utility model can improve compatibility and reduce hardware complexity by dynamically adjusting signals according to the level difference of different endoscope sensors through the automatic level control module.

[0028] (3) The utility model discloses based on low -power consumption millimeter wave technology, through the polarization orthogonal arrangement of multichannel antenna, adopt the mode of multichannel parallel transmission, can avoid the same frequency interference, and can enlarge the transmission bandwidth of endoscope, support higher resolution image transmission, satisfy the demand of new type endoscope (such as 4K ultra -high definition system).

[0029] (4) The existing endoscope connector technology faces the dual bottleneck of physical contact reliability and transmission bandwidth extensibility, and the emerging medical scene adaptation scheme of wireless technology is still blank. The utility model is a kind of non-contact, high bandwidth, strong compatible new connector, meet the following needs: completely avoid the physical damage caused by disinfection and plugging;Support the real-time lossless transmission of ultra-high definition image data;Adapt to the signal characteristics of different endoscope sensors;Realize multi-channel anti-interference transmission in miniaturization package. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings described herein are used to provide further understanding of the embodiments of the utility model, constitute a part of this application, and do not constitute the limitation to the embodiments of the utility model. In the drawings:

[0031] Figure 1 The system block diagram when the utility model one concrete embodiment is set on endoscope;

[0032] Figure 2 For Figure 1 The block diagram of automatic level control module in. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantage of the utility model more clear and obvious, the utility model is further explained in detail below, and the illustrative embodiment of the utility model and its explanation are only used to explain the utility model, and not as the limitation to the utility model.

[0034] Embodiment:

[0035] Such as Figure 1As shown, a medical endoscope connector includes an automatic level control module and a millimeter-wave transmitting module disposed within the endoscope body, and a millimeter-wave receiving module disposed within the endoscope host. The millimeter-wave transmitting module and the millimeter-wave receiving module interact wirelessly. In this embodiment, the automatic level control module is connected to the millimeter-wave transmitting module and is used to adjust the image signal level output from the camera within the endoscope body to a set threshold range before outputting it to the millimeter-wave transmitting module. In this specific design, the millimeter-wave transmitting module within the endoscope body and the millimeter-wave receiving module within the endoscope host are encapsulated with potting compound to isolate them from disinfectant liquid. Both the millimeter-wave transmitting module and the millimeter-wave receiving module in this embodiment include both 28GHz and 60GHz frequency bands to support dual-band operation. The automatic level control module in this embodiment presets multiple sets of level threshold ranges, corresponding to the sensor output characteristics of gastrointestinal endoscopes, ultrasound endoscopes, and uroscopes, respectively.

[0036] like Figure 2 As shown, the automatic level control module in this embodiment includes a voltage-controlled attenuator, a coupler, a rectifier, a filter, and a comparator. The voltage-controlled attenuator is located on the line between the camera on the endoscope body and the millimeter-wave transmitting module. The coupler, rectifier, filter, and comparator are connected sequentially. The coupler couples a signal from the output of the voltage-controlled attenuator to monitor its output level. The rectifier converts the high-frequency AC signal coupled by the coupler into a pulsating DC signal. The filter removes the high-frequency ripple after rectification and outputs a smooth DC level signal. The comparator compares the filtered DC level with a preset reference voltage and generates a control signal to drive the voltage-controlled attenuator. The voltage-controlled attenuator receives the control signal from the comparator and adjusts the signal strength to ensure its output level is within the linear operating range of the millimeter-wave transmitting module. In this embodiment, when the comparator compares the filtered DC level with the preset reference voltage, if the filtered DC level is less than the preset reference voltage, the output level is low, and the voltage-controlled attenuator maintains minimum attenuation and sends its input signal to the millimeter-wave transmitting module; if the filtered DC level is greater than or equal to the preset reference voltage, the output level is high, the voltage-controlled attenuator increases the attenuation and reduces its output level to within the set threshold range, and then outputs it to the millimeter-wave transmitting module.

[0037] This embodiment constructs a closed-loop automatic level control module using five modules: voltage-controlled attenuator (VCA), coupler, rectifier, filter, and comparator. The specific process is as follows:

[0038] 1. Input signal preprocessing

[0039] Input signal: The high-frequency image signal (such as millimeter-wave baseband signal) output by the camera sensor enters the automatic level control module, and its level value may fluctuate due to transmission distance, environmental interference or sensor differences.

[0040] Voltage-controlled attenuator (VCA):

[0041] In the initial state, the attenuation of the voltage-controlled attenuator (VCA) is adjusted by the control voltage (initial value is usually 0), and the signal passes directly or is slightly attenuated.

[0042] Core function: dynamically adjust the signal strength to ensure that the output level is within the linear working range of the wireless transmission module.

[0043] 2. Signal sampling and feedback

[0044] Coupler: couple part of the energy from the main signal path (typical coupling degree: -20dB) for real-time monitoring of the output signal level.

[0045] 3. Signal rectification and filtering

[0046] Rectifier: converts the coupled high-frequency alternating current signal into a pulsating direct current signal. The rectifier in this embodiment uses Schottky diodes (low on-state voltage drop) or a full-wave rectification circuit to improve conversion efficiency.

[0047] Low-pass filter: filters out the high-frequency ripple after rectification (cutoff frequency: 1-10kHz), outputs a smooth direct current level signal. The low-pass filter in this embodiment uses a second-order RC passive filter or an active filter composed of an operational amplifier to suppress noise interference.

[0048] 4. Level comparison and control

[0049] Comparator:

[0050] Compare the filtered direct current level with the preset reference voltage (Vref) to generate a control signal to drive the VCA.

[0051] Logic rules:

[0052] Input level < Vref: output low level, VCA maintains minimum attenuation (signal straight through).

[0053] Input level ≥ Vref: output high level, VCA increases attenuation, reduces output level to the preset range.

[0054] In the specific design of this embodiment, a hysteresis window (such as ±5mV) can also be introduced through a positive feedback resistor to avoid frequent switching at the level critical point.

[0055] 5. Closed-loop dynamic adjustment

[0056] Real-time feedback: the system continuously monitors the output level, and forms a closed-loop control through the comparator-voltage-controlled attenuator to dynamically compensate for signal fluctuations.

[0057] Response time: The overall loop delay is controlled in the order of microseconds (e.g., <10us), meeting the real-time transmission requirements of endoscopes.

[0058] The application of the embodiment can realize adaptive level control, automatically adapt the output level difference of different endoscope sensors (such as gastroscopes and ultrasonic endoscopes), and does not need to customize an attenuation circuit for each device, so that the compatibility is improved. The embodiment can dynamically compensate signal attenuation / enhancement caused by changes in transmission distance, temperature drift or power fluctuations, ensure stable operation of the wireless module, and improve the anti-environmental interference performance.

[0059] The embodiment prevents nonlinear distortion (such as harmonic interference and intermodulation distortion) of the wireless transmission module caused by excessively high input level through limiting control, ensures image clarity, and can avoid signal saturation. The embodiment effectively filters high-frequency noise through the coupling-filter link, improves the signal-to-noise ratio (SNR) of the feedback signal, enhances the control accuracy, and can improve the noise suppression performance.

[0060] The embodiment uses general devices (such as wideband VCAs and miniature couplers) to replace customized attenuation circuits, reduces the hardware complexity of multi-mirror adaptation, and activates attenuation only when the input is over-limit. Compared with the fixed attenuation scheme, the overall power consumption is reduced by more than 30%.

[0061] The embodiment does not need mechanical contacts or optical path calibration, avoids the wear problem of traditional potentiometer adjustment, and prolongs the service life of the connector. In the specific implementation of the embodiment, if the feedback loop fails, the VCA defaults to a straight-through state, avoiding the risk of diagnosis and treatment caused by signal interruption.

[0062] The design of the automatic level control module provides a key guarantee for the high-bandwidth and low-delay transmission of the embodiment.

[0063] The millimeter wave transmission module and the millimeter wave receiving module of the embodiment are each provided with multiple antennas and have the same number of antennas, and the antennas of the two form a polarized orthogonal antenna array. The polarized orthogonality refers to that the polarization directions of adjacent antennas are perpendicular to each other or the rotation directions are opposite, the same-frequency signal interference is reduced through polarization isolation, and then multiple parallel transmissions are realized in a limited space, the bandwidth is improved, and signal crosstalk is avoided.

[0064] The polarization orthogonal antenna array of the embodiment adopts any one of horizontal polarization, vertical polarization, left-handed circular polarization and right-handed circular polarization or a combination of two or more polarization modes. A specific mode of the combination of multiple polarization modes is that the polarization orthogonal antenna array includes at least one pair of linearly polarized antennas arranged alternately in horizontal polarization and vertical polarization, and at least one pair of circularly polarized antennas arranged alternately in left-handed circular polarization and right-handed circular polarization. An electromagnetic band gap (EBG) structure or a defect ground structure (DGS) is arranged between the linearly polarized antennas and the circularly polarized antennas to suppress the coupling between the antennas; the axial ratio (Axial Ratio) of the circularly polarized antennas is less than 3dB, and the inclination angle of the reflector plate is 45° to suppress the multipath reflection interference in the operating room.

[0065] The arrangement mode of the polarization orthogonal antenna array includes horizontal polarization adjacent orthogonal arrangement, vertical polarization adjacent orthogonal arrangement and left-handed polarization and right-handed polarization adjacent orthogonal arrangement. The horizontal polarization adjacent orthogonal arrangement method is that:

[0066] The electric field vibration directions of the adjacent antennas are alternately arranged in the horizontal direction (0°) and the orthogonal horizontal direction (90°).

[0067] For example, in the scope side connector, two millimeter wave antennas are placed side by side, the polarization direction of the first antenna is parallel to the long side of the connector (horizontal), and the polarization direction of the second antenna is rotated by 90° (vertical). Physical realization: adjust the polarization direction through the feed point position of the microstrip patch antenna.

[0068] Advantages:

[0069] Simplified design: the linearly polarized antenna structure is simple and easy to miniaturize and integrate.

[0070] High isolation: when the horizontal and vertical polarizations are orthogonal, the isolation can reach 20-30dB, significantly reducing the same frequency crosstalk.

[0071] Strong compatibility: suitable for scenarios that need to be fixedly installed (such as the endoscope main machine side).

[0072] The vertical polarization adjacent orthogonal arrangement method is that:

[0073] Similar to the horizontal polarization orthogonal, but the main polarization direction is the vertical direction (90°), and the adjacent antenna is rotated by 90° to become the horizontal direction (0°).

[0074] Advantages:

[0075] Direction complementarity: the vertical polarization attenuates the horizontal direction signal less, and is suitable for asymmetric spatial layout.

[0076] Anti-shielding: the vertical polarization wave has low loss when penetrating obstacles (such as human tissues).

[0077] The arrangement method of left-handed polarization and right-handed polarization adjacent orthogonal arrangement is:

[0078] Left-handed circular polarization (LHCP): The electric field vector of electromagnetic wave rotates anticlockwise over time.

[0079] Right-handed circular polarization (RHCP): The electric field vector rotates clockwise.

[0080] Arrangement: The circular polarization direction of adjacent antennas is designed as left-handed and right-handed alternating arrangement.

[0081] Advantages:

[0082] Anti-multipath interference: The polarization direction of circularly polarized wave is reversed after reflection (LHCP is changed to RHCP), and the receiving end can suppress the reflected signal.

[0083] Directional insensitivity: Suitable for dynamic operation scenarios of endoscopes, avoiding signal attenuation caused by angle deviation.

[0084] High isolation: The isolation of left-handed and right-handed polarization can reach more than 25dB.

[0085] The following is an example of polarization arrangement in endoscope connector:

[0086] Scenario requirements:

[0087] Integrate 4-way millimeter wave antennas in the connector on the scope side, supporting 4K image transmission (5Gbps per channel, total bandwidth 20Gbps).

[0088] Arrangement scheme:

[0089] Polarization selection: Adopting a mixed layout of double linear polarization and double circular polarization.

[0090] Antenna 1&2: Horizontal / vertical linear polarization orthogonal pair, responsible for transmitting basic brightness signals (Y channel).

[0091] Antenna 3&4: Left-handed / right-handed circular polarization orthogonal pair, transmitting color and depth signals (CbCr channel).

[0092] Spatial arrangement:

[0093] Linear polarization antennas are arranged in parallel along the long axis of the connector, and circular polarization antennas are embedded at a 45° angle on both sides.

[0094] Optimize the spacing through electromagnetic simulation (typical value: λ / 2, about 2.5mm@60GHz), to avoid near-field coupling.

[0095] Advantages:

[0096] The total bandwidth is increased to 4 times that of traditional single polarization design (4x5Gbps).

[0097] The circular polarization channel is resistant to multipath interference and ensures color signal stability; and the linear polarization channel reduces power consumption.

[0098] The above detailed description of the specific embodiments has further detailed the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above detailed description is only the specific embodiments of the present application and is not used to limit the protection scope of the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A medical endoscope connector characterized by comprising: The application relates to an automatic level control module and a millimeter wave transmitting module arranged in an endoscope body, and a millimeter wave receiving module arranged in an endoscope main machine, wherein the millimeter wave transmitting module and the millimeter wave receiving module realize information interaction through wireless communication; the automatic level control module is connected with the millimeter wave transmitting module and is used for adjusting an image signal level value output by a camera of the endoscope body to be within a set threshold range and then output to the millimeter wave transmitting module.

2. The medical endoscope connector according to claim 1, wherein The automatic level control module comprises a voltage-controlled attenuator, a coupler, a rectifier, a filter and a comparator, the voltage-controlled attenuator is arranged on a line between the camera of the endoscope body and the millimeter wave transmitting module, the coupler, the rectifier, the filter and the comparator are sequentially connected, the coupler couples signals from an output end of the voltage-controlled attenuator to monitor the output level of the voltage-controlled attenuator, the rectifier converts high-frequency alternating signals coupled by the coupler into pulsating direct-current signals, the filter is used for filtering high-frequency ripples after rectification and outputting smooth direct-current level signals, the comparator compares the filtered direct-current level with a preset reference voltage and generates a control signal to drive the voltage-controlled attenuator, and the voltage-controlled attenuator receives the control signal sent by the comparator and adjusts the signal strength so that the output level is within a linear working range of the millimeter wave transmitting module.

3. The medical endoscope connector according to claim 2, wherein When the comparator compares the filtered direct-current level with the preset reference voltage, if the filtered direct-current level is less than the preset reference voltage, a low level is output, and the voltage-controlled attenuator keeps minimum attenuation to send the input signals to the millimeter wave transmitting module; If the filtered direct-current level is greater than or equal to the preset reference voltage, a high level is output, the voltage-controlled attenuator increases the attenuation to reduce the output level to be within the set threshold range, and then the output is sent to the millimeter wave transmitting module.

4. The medical endoscope connector according to claim 1, wherein The millimeter wave transmitting module and the millimeter wave receiving module are both provided with multiple antennas and have the same number of antennas, and the antennas of the two modules constitute a polarized orthogonal antenna array.

5. The medical endoscope connector according to claim 4, wherein The polarized orthogonal antenna array adopts any one of horizontal polarization, vertical polarization, left-handed circular polarization and right-handed circular polarization or a combination of two or more polarization modes.

6. The medical endoscope connector according to claim 5, wherein The polarized orthogonal antenna array comprises at least one pair of linearly polarized antennas arranged alternately in horizontal polarization and vertical polarization, and at least one pair of circularly polarized antennas arranged alternately in left-handed circular polarization and right-handed circular polarization.

7. The medical endoscope connector of claim 6, wherein An electromagnetic bandgap structure or a defective ground structure is arranged between the linearly polarized antennas and the circularly polarized antennas.

8. The medical endoscope connector of claim 6, wherein The axial ratio of the circularly polarized antennas is less than 3dB, and the inclination angle of the reflection plate is 45 degrees.

9. The medical endoscope connector according to any one of claims 1 to 8, characterized by The millimeter wave transmitting module in the endoscope body and the millimeter wave receiving module in the endoscope main machine are wrapped by potting glue.

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