CN210954361U

CN210954361U - Anti-interference microwave detection module

Info

Publication number: CN210954361U
Application number: CN201921292788.2U
Authority: CN
Inventors: 邹高迪; 邹新
Original assignee: Gaodi Zou
Current assignee: Gaodi Zou
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-07-07
Anticipated expiration: 2029-08-05

Abstract

The utility model provides an anti-interference microwave detection module, wherein anti-interference microwave detection module has reduced through the mode of frequency selection in the environment and is different from the electromagnetic radiation of the frequency channel of anti-interference microwave detection module is right the interference of the echo signal of anti-interference microwave detection module to further acquire an undulation signal through the mode to Doppler intermediate frequency signal trend processing, then undulant characteristic parameter in the undulation signal corresponds to and surveys the interior object motion characteristic of space, so that anti-interference microwave detection module can complete feedback the motion characteristic of object in the detection space has reduced electromagnetic radiation in the environment and is right the interference of undulation signal, include with the electromagnetic radiation of anti-interference microwave detection module co-frequency channel is right the interference of undulation signal.

Description

Anti-interference microwave detection module

Technical Field

The utility model relates to a microwave detection field especially relates to anti-interference microwave detection module.

Background

With the development of the internet of things technology, the requirements of artificial intelligence, smart home and intelligent security technology on environment detection, particularly on detection accuracy of human existence, movement and micro motion are higher and higher, and accurate judgment basis can be provided for intelligent terminal equipment only by acquiring a stable enough detection result. Among them, the radio technology, including the microwave detection technology based on the doppler effect principle, is used as a person and an object, and the important junction between the objects has unique advantages in the behavior detection and the existence detection technology, and can detect the action characteristics, the movement characteristics and the micromotion characteristics of a moving object, such as a person, even the heartbeat and the respiration characteristic information of the person without invading the privacy of the person, thereby having wide application prospect.

ISM (Industrial Scientific medical) Band is a license-free frequency Band defined by ITU-R (International telecommunication Union, radio communication Sector) for use by organizations such as industry, science and medicine, the frequency bands applied to microwave detection in these frequency bands opened by ITU-R are mainly 2.4Ghz, 5.8Ghz, 10.525Ghz, 24.125Gh, etc., and the corresponding microwave detectors need to observe a certain transmission power (generally, the transmission power is lower than 1W) to reduce interference to other radio devices when using these frequency bands, although the definition and the permission of different frequency bands can specify the use frequency bands of the radios and reduce the probability of mutual interference between the radios in different frequency bands, under the limited frequency band resource permission, the problem of mutual interference between the radios in adjacent frequency bands or in the same frequency band becomes more serious as the use coverage rate of the radios in the adjacent frequency bands or in the same frequency band is improved.

In addition, since the radio technology is also used as a hub for information transfer in the communication field, and its anti-interference capability is related to economic and defense safety, corresponding authentication standards, such as RED authentication in the european union and FCC authentication in the united states, are also proposed for the anti-interference capability of the radio technology internationally and in different countries and regions. That is, even if a microwave probe using a frequency band without authorization based on the doppler effect principle is used, it is required to face the certification standards of the international and corresponding countries and regions while facing the problem of the mutual interference which is becoming serious. Particularly, with the development of 5G high-speed communication, the coverage of a high-frequency communication network and the popularity of corresponding communication devices are higher and higher, which inevitably leads to congestion of an adjacent frequency band of a 5.8Ghz band, so that the microwave detector using the 5.8Ghz band, which is more popular at present, faces more serious electromagnetic radiation interference, and the authentication standard of the microwave detector using the 5.8Ghz band is also stricter, for example, the upper limit of a RS (radiated power) test frequency point according to the IEC (International electrotechnical Commission) standard is correspondingly increased to 6 Ghz.

The microwave detector of the prior art emits at least one probe beam in a detection space under the excitation of an excitation signal, and receives an echo formed by the probe beam being reflected by at least one object in the detection space to generate an echo signal, so as to generate a doppler intermediate frequency signal corresponding to a frequency difference between the excitation signal and the echo signal based on the doppler effect principle, wherein the microwave detector is capable of responding to a full frequency band of electromagnetic wave signals, that is, in the detection space, electromagnetic wave signals of different frequency bands can be responded by the microwave detector to affect the echo signal, and further affect the doppler intermediate frequency signal, that is, to affect the accuracy of the microwave detector, and meanwhile, the doppler intermediate frequency signal can also be directly interfered by an electromagnetic environment of the detection space, that is, the echo signal and the doppler intermediate frequency signal can be interfered by an electromagnetic environment of the detection space, particularly, the low-frequency electromagnetic radiation interference is that on one hand, the doppler intermediate frequency signal corresponding to the human body movement is in the low frequency band and is difficult to completely eliminate the low-frequency electromagnetic interference in a filtering mode, and on the other hand, the low-frequency electromagnetic radiation has strong attenuation resistance and has a large influence on the echo signal and the doppler intermediate frequency signal. The microwave detector in the prior art filters a signal with a lower frequency and a high frequency signal in the doppler intermediate frequency signal based on filtering processing of the doppler intermediate frequency signal, on one hand, simultaneously filters a part of the low frequency signal corresponding to human body activity in the doppler intermediate frequency signal so that feedback of the microwave detector to the human body activity is incomplete, on the other hand, filtering processing of the doppler intermediate frequency signal generated based on an echo signal which is already affected by electromagnetic radiation in the environment and the doppler intermediate frequency signal which is further affected by low frequency electromagnetic radiation cannot restore feedback of the doppler intermediate frequency signal to the human body activity, that is, feedback of the microwave detector to the human body activity is incomplete and accurate at present, and integrity and accuracy of feedback of the microwave detector to the human body activity are further limited as the electromagnetic environment is more complex, such as current microwave detectors, have difficulty passing current RS test standards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anti-interference microwave detection module, wherein anti-interference microwave detection module has reduced through the mode of frequency selection in the environment and has been different from the electromagnetic radiation of the frequency channel of anti-interference microwave detection module is right the interference of the echo signal of anti-interference microwave detection module has especially reduced the low frequency range electromagnetic radiation (if electromagnetic radiation 1Hz and below) that has stronger anti-decay characteristic right the interference of the echo signal of anti-interference microwave detection module is in order to be favorable to improving the detection accuracy of anti-interference microwave detection module.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module further acquires an fluctuation signal through a trend processing mode for doppler intermediate frequency signals, then the fluctuation characteristic parameter in the fluctuation signal corresponds to the motion characteristic of the object in the detection space, so that the anti-interference microwave detection module can feed back completely the motion characteristic of the object in the detection space.

Another object of the utility model is to provide an anti-interference microwave detection module, wherein anti-interference microwave detection module acquires through the mode of handling Doppler intermediate frequency signal trend fluctuation signal has reduced electromagnetic radiation in the environment right fluctuation signal's interference, include with anti-interference microwave detection module is right with the electromagnetic radiation of frequency channel fluctuation signal's interference, so as to be favorable to improving anti-interference microwave detection module is right the accuracy of the detection of the action of object in the detection space.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module is further right through the low pass filtering processing of the fluctuation signal, it is right to distinguish the object action of human activity action in the detection space the interference of the fluctuation signal and the electromagnetic radiation of the high frequency band in the environment (such as the electromagnetic radiation above 1 Hz) are right the interference of the fluctuation signal, so as to be favorable for improving the accuracy of the feedback of the fluctuation signal to the human activity action.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein it is right based on the frequency selection processing of the echo signal, right the trend processing of the doppler intermediate frequency signal and right the low pass filtering processing of the fluctuation signal, the anti-interference microwave detection module can accurately detect the movement, the fine motion, the respiration and the heartbeat of the human body in the detection space.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module includes a frequency selection unit, wherein the frequency selection unit is set up in order to be able to in the anti-interference microwave detection module forms a frequency selection network, wherein the frequency selection network allows the circuit that the electric signal between specific frequency interval passes through for the selectivity, wherein the specific frequency interval is for including the frequency interval of excitation signal's frequency, with by the frequency selection network frequency selection handles echo signal, and then reduce in the environment be different from the electromagnetic radiation of the frequency band of anti-interference microwave detection module is right the interference of the echo signal of anti-interference microwave detection module.

Another object of the utility model is to provide an anti-interference microwave detection module, wherein the frequency-selecting network is set up to the warp the frequency-selecting network is selected and is handled echo signal is greater than 1GHz, with by the frequency-selecting network is right echo signal's frequency-selecting is handled the electromagnetic radiation who reduces the low-frequency channel and is right echo signal's interference, and be favorable to anti-interference microwave detection module reduces when adopting the 5.8G frequency channel right the required precision of frequency-selecting unit, and then reduces anti-interference microwave detection module's cost.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the frequency selecting unit is set up to be able to form at least one resonant circuit in the anti-interference microwave detection module, so as to allow the resonant characteristic selectivity of the resonant circuit to pass through the electric signal between specific frequency intervals, i.e. to form the frequency selecting network, which reduces the electromagnetic radiation in the environment different from the frequency band of the anti-interference microwave detection module to the interference of the echo signal.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the resonant circuit is grounded to improve the quality factor of the resonant circuit, thereby reducing the frequency selection interval of the electromagnetic radiation of the frequency of the anti-interference microwave detection module, which is different from the environment, thereby reducing the interference of the echo signal.

Another object of the present invention is to provide an anti-interference microwave detecting module, wherein the feeding point of the conventional microwave detector is grounded through an equivalent inductor to form the resonant circuit and the resonant circuit are grounded, so that the frequency selection of the echo signal can be easily implemented, simple and easy to operate, and low cost.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the frequency selecting unit is set up to be able to form at least a high pass filter in the anti-interference microwave detection module, so that the echo signal is processed in frequency selection, thereby forming the frequency selecting network, it is right to reduce the low frequency band electromagnetic radiation with stronger anti-attenuation characteristic the interference of echo signal, therefore simple and easy, low cost.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein the anti-interference microwave detection module is realized by at least one low pass filter simultaneously to trend processing of doppler intermediate frequency signal and to low pass filtering processing of fluctuation signal, thus simple and easy, low cost.

Another objective of the present invention is to provide an anti-jamming microwave detection module, wherein the anti-jamming microwave detection module realizes trend processing of the doppler intermediate frequency signal and low pass filtering processing of the fluctuation signal by at least one butterworth low pass filter, so as to utilize the integral characteristic of the butterworth low pass filter, presenting high-speed motion interference corresponding to wind-blown grass and rain-falling micro objects in the Doppler intermediate frequency signal in the fluctuation signal in a short small fluctuation mode in the trend processing process of the Doppler intermediate frequency signal, thereby allowing to eliminate the interference of the high-speed motion of the tiny objects in the detection space to the fluctuating signal based on the existing signal back noise processing technology, so as to be beneficial to improving the accuracy of the wave signal in feeding back the motion of the human body and the motion of other objects in the detection space.

Another object of the present invention is to provide an anti-interference microwave detection module, wherein pass through butterworth low pass filter realizes right doppler intermediate frequency signal's trend is handled and right fluctuating signal's low pass filter handles can get rid of the high speed motion of tiny object is right fluctuating signal's interference in the detection space, therefore anti-interference microwave detection module is further applicable to the outdoor environment and surveys the object (like the car) of removal.

Another object of the utility model is to provide an anti-interference microwave detection module, wherein based on right echo signal's frequency selection is handled, right doppler intermediate frequency signal's trend is handled and to fluctuation signal's low pass filter handles, anti-interference microwave detection module can avoid adopting amplitude modulation signal and the interference of the test signal of increasing the frequency gradually in the RS test, therefore anti-interference microwave detection module has the anti-interference ability that can be certified by present RS test.

According to an aspect of the utility model, the utility model provides an anti-interference microwave detection module, anti-interference microwave detection module includes:

an oscillator circuit, wherein the oscillator circuit is configured to be powered to generate an excitation signal;

a transmitting unit, wherein the transmitting unit is coupled to the oscillating circuit to be excited by the excitation signal to transmit a probe beam to a probe space;

a receiving unit, wherein the receiving unit receives an echo formed by the probe beam reflected by at least one object in the probe space to generate an echo signal;

a mixed detection unit, wherein the mixed detection unit is respectively coupled with the oscillation circuit and the receiving unit to perform mixed detection on the excitation signal and the echo signal so as to generate a doppler intermediate frequency signal corresponding to a frequency difference between the excitation signal and the echo signal based on the doppler effect principle, and the doppler intermediate frequency signal is a response to a motion of an object in the detection space; and

a frequency selecting unit, wherein the frequency selecting unit is coupled between the mixer-demodulation unit and the receiving unit to form at least one frequency selecting network between the mixer-demodulation unit and the receiving unit, wherein the echo signal is frequency-selected by the frequency selecting network and transmitted to the mixer-demodulation unit through the frequency selecting unit to reduce the interference of electromagnetic radiation in the environment different from the frequency band of the excitation signal to the doppler intermediate frequency signal.

In one embodiment, the receiving unit comprises a radiation source and a reference ground, wherein the radiation source and the reference ground are arranged at intervals to equivalently form a capacitor C₀Wherein the radiation source has a feed point, wherein the radiation source has a feed pointThe frequency selection unit comprises at least one equivalent capacitor and at least one equivalent inductor, wherein at least one equivalent capacitor is electrically connected between the frequency mixing detection unit and the feeding point of the radiation source, and the circuit coupling structure of the frequency selection unit between the receiving unit and the frequency mixing detection unit satisfies the equivalent capacitor, the equivalent inductor and the capacitor C₀Can form said frequency selective network.

In an embodiment, the frequency-selective network formed by the circuit coupling structure of the frequency-selective unit between the receiving unit and the mixer-detector unit satisfies that the frequency of the echo signal frequency-selective processed by the frequency-selective network is greater than 1Ghz and includes a frequency range of the frequency band in which the excitation signal is located.

In an embodiment, the frequency selecting unit includes one equivalent capacitor and one equivalent inductor, wherein one end of the equivalent capacitor is electrically connected to the frequency mixing and detecting unit, the other end of the equivalent capacitor is electrically connected to one end of the equivalent inductor, and the other end of the equivalent inductor is electrically connected to the feeding point of the receiving unit.

In an embodiment, the frequency selecting unit further includes a resistor, wherein the resistor is connected in parallel to the equivalent inductor.

In an embodiment, the frequency selecting unit further includes a resistor, wherein the resistor is electrically connected between the equivalent inductor and the feeding point to be connected in series with the equivalent inductor and the equivalent capacitor.

In an embodiment, the frequency selecting unit further includes another equivalent capacitor, wherein the another equivalent capacitor is connected to the equivalent inductor in parallel.

In an embodiment, the frequency selecting unit includes one equivalent capacitor and one equivalent inductor, wherein one end of the equivalent capacitor is electrically connected to the mixer-demodulation unit, and the other end of the equivalent capacitor is electrically connected to the feeding point of the receiving unit, wherein one end of the equivalent inductor is electrically connected to the feeding point of the receiving unit, and the other end of the equivalent inductor is grounded.

In one embodiment, the equivalent inductance is equivalently formed by a resistance.

In an embodiment, the frequency selecting unit further includes another equivalent capacitor, wherein the another equivalent capacitor is electrically connected between the equivalent inductor and the feeding point and is connected in series with the equivalent inductor.

In an embodiment, the frequency selecting unit further includes a resistor, wherein the resistor, the other equivalent capacitor and the equivalent inductor are sequentially connected in series.

In an embodiment, the frequency selecting unit further includes another equivalent inductor, wherein the another equivalent inductor is electrically connected between the equivalent capacitor and the feeding point and is connected in series with the equivalent capacitor.

In an embodiment, the frequency selecting unit further includes another equivalent inductor, wherein the another equivalent inductor is electrically connected between the equivalent inductor and the feeding point and is connected in series with the equivalent capacitor.

In an embodiment, the frequency selecting unit further includes another equivalent inductor, wherein one end of the another equivalent inductor is electrically connected between the equivalent capacitor and the equivalent inductor, and the other end of the another equivalent inductor is grounded.

In an embodiment, wherein the transmitting unit and the receiving unit are integrated in one piece.

In an embodiment, the anti-jamming microwave detection module further includes a fluctuation signal conversion unit, wherein the fluctuation signal conversion unit is electrically connected to the frequency-mixing detection unit and configured to convert the doppler intermediate frequency signal into a fluctuation signal based on a variation trend of the doppler intermediate frequency signal, and a characteristic parameter of fluctuation in the fluctuation signal corresponds to a characteristic of an object motion in the detection space.

In an embodiment, the wobble signal conversion unit is configured such that the frequency of the wobble signal converted by the wobble signal conversion unit is less than 50 Hz.

In an embodiment, the wobble signal conversion unit is preferably arranged such that the frequency of the wobble signal converted by the wobble signal conversion unit is less than 25 Hz.

In an embodiment, wherein the wobble signal conversion unit is arranged as at least one butterworth low pass filter.

In an embodiment, the anti-jamming microwave detection module further includes at least one amplifying unit, wherein the at least one amplifying unit is disposed between the mixing detection unit and the fluctuation signal conversion unit to amplify the doppler intermediate frequency signal.

In an embodiment, the anti-jamming microwave detection module further includes a control unit and an execution unit, wherein the control unit is electrically connected between the execution unit and the fluctuation signal conversion unit to receive the fluctuation signal and control the execution unit according to the fluctuation signal.

In one embodiment, at least one of the amplifying units is disposed between the wobble signal conversion unit and the control unit to amplify the wobble signal.

In an embodiment, the equivalent capacitor is equivalently formed by microstrip lines spaced from each other.

In an embodiment, the equivalent inductor is equivalently formed as a microstrip line.

In one embodiment, the equivalent inductance is equivalently formed by resistance.

In one embodiment, wherein the oscillation circuit comprises a three-pole circuit handler, a first capacitor, a second capacitor, a third capacitor, a first resistor and a second resistor, wherein the three-pole circuit handler has a first connection terminal, a second connection terminal and a third connection terminal grounded, wherein the first capacitor is electrically connected between the first connection terminal and the second connection terminal of the three-pole circuit handler, wherein the second capacitor is electrically connected between the second connection terminal and the third connection terminal of the three-pole circuit handler, wherein the third capacitor is electrically connected between the first connection terminal and the third connection terminal of the three-pole circuit handler, wherein the second resistor is electrically connected between the first connection terminal and the second connection terminal of the three-pole circuit handler, wherein one end of the first resistor is electrically connected to the first connection terminal of the three-pole circuit processor, so that the oscillation circuit can provide the excitation signal at the second connection terminal of the three-pole circuit processor when the oscillation circuit is powered at the other end of the first resistor.

In one embodiment, wherein the oscillation circuit includes a three-pole circuit handler, a first capacitor, a second capacitor, a third capacitor, a first resistor, a second resistor, a third resistor, and an inductor, wherein the three-pole circuit handler has a first connection terminal, a second connection terminal, and a third connection terminal grounded, wherein the first capacitor is electrically connected between the first connection terminal and the third connection terminal of the three-pole circuit handler, wherein one terminal of the second capacitor is electrically connected to the first connection terminal of the three-pole circuit handler, and the other terminal of the second capacitor is grounded, wherein one terminal of the third capacitor is electrically connected to the second connection terminal of the three-pole circuit handler, and the other terminal of the third capacitor is grounded, wherein the first resistor is electrically connected between the first connection terminal and the second connection terminal of the three-pole circuit handler, one end of the second resistor is electrically connected to the second connection terminal of the three-pole circuit processor, and the other end of the second resistor is grounded, wherein one end of the third resistor is electrically connected to the third connection terminal of the three-pole circuit processor, and the other end of the third resistor is grounded, wherein one end of the inductor is electrically connected to the first connection terminal of the three-pole circuit processor, so that the oscillation circuit can provide the excitation signal at the third connection terminal of the three-pole circuit processor when the oscillation circuit is powered at the other end of the inductor.

In an embodiment, the three-pole circuit processor is configured as a triode, wherein the first connection terminal is a collector of the triode, the second connection terminal is a base of the triode, and the third connection terminal is an emitter of the triode.

In an embodiment, the three-pole circuit processor is configured as a MOS transistor, wherein the first connection terminal is a drain of the MOS transistor, the second connection terminal is a gate of the MOS transistor, and the third connection terminal is a source of the MOS transistor.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

Fig. 1 is a block diagram of an anti-interference microwave detection module according to an embodiment of the present invention.

Fig. 2 is a partial equivalent circuit structure of an anti-interference microwave detection module according to an embodiment of the present invention.

Fig. 3 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 4 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 5 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 6 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 7 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 8 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 9 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 10 is a partial equivalent circuit structure of an anti-jamming microwave detection module according to another embodiment of the present invention.

Fig. 11 is a partial equivalent circuit structure of an anti-interference microwave detection module according to another embodiment of the present invention.

Fig. 12 is a partial equivalent circuit structure of an anti-jamming microwave detection module according to another embodiment of the present invention.

Fig. 13 is a partial equivalent circuit structure of an anti-jamming microwave detection module according to another embodiment of the present invention.

Fig. 14 is a partial equivalent circuit structure of an anti-jamming microwave detection module according to another embodiment of the present invention.

Fig. 15 is a partial equivalent circuit structure of an anti-jamming microwave detection module according to another embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The utility model provides an anti-interference microwave detection module, wherein anti-interference method of anti-interference microwave detection module includes the step:

s1, emitting at least one probe beam in a probe space under the excitation of an excitation signal;

s2, receiving an echo formed by the probe beam reflected by at least one object in the probe space to generate an echo signal;

s3, frequency-selecting and processing the echo signal; and

s4, performing mixed detection on the excitation signal and the echo signal to generate a Doppler intermediate frequency signal corresponding to the frequency difference between the excitation signal and the echo signal based on the Doppler effect principle, wherein the Doppler intermediate frequency signal is a response to the movement of the object in the detection space.

Specifically, in step S3, the frequency selection processing on the echo signal should be understood as selecting a frequency interval containing the frequency band where the excitation signal is located in the echo signal, for example, by filtering the echo signal in a part or all of the frequency intervals different from the frequency band where the excitation signal is located in the echo signal, excluding the echo signal in a part or all of the frequency intervals different from the frequency band where the excitation signal is located in the echo signal, so as to reduce interference of electromagnetic radiation in the environment different from the frequency band where the excitation signal is located on the echo signal.

It will be appreciated by those skilled in the art that the excitation signal has a frequency f based on the doppler effect principle₀If the frequency f of the doppler intermediate frequency signal corresponding to the object motion in the detection space is f₀V/c, where v is a velocity component of the motion velocity of the object in the detection space relative to the anti-jamming microwave detection module in the direction from the object to the anti-jamming microwave detection module, c is a transmission velocity of the electromagnetic wave in the environment, so that the frequency of the doppler intermediate frequency signal corresponding to the human body motion and the motion of the object in the detection space is in a low frequency band, that is, the frequency of the doppler intermediate frequency signal corresponding to the human body motion and the motion of the object is in a low frequency band, and the electromagnetic radiation in the low frequency band has a high anti-attenuation characteristic, that is, the electromagnetic radiation in the low frequency band (such as the electromagnetic radiation generated by the power supply grid) in the environment has a high interference capability on the echo signal and the doppler intermediate frequency signal, so that preferably, in the step S3, the echo signal is processed by frequency selection in a manner of filtering the echo signal in a low frequency range different from the frequency range where the excitation signal is located The wave signal is used to reduce the interference of the low-frequency electromagnetic radiation with strong anti-attenuation characteristic to the echo signal, so as to improve the accuracy of the feedback of the doppler intermediate frequency signal, which is generated based on the doppler effect principle in the step S4 and corresponds to the frequency difference between the excitation signal and the echo signal, to the motion of the object in the detection space, that is, the anti-electromagnetic radiation interference performance of the anti-interference microwave detection module is improved.

Further, the anti-jamming method of the anti-jamming microwave detection module further comprises the following steps:

s5, trend processing the Doppler intermediate frequency signal to obtain a fluctuation signal based on the trend change of the Doppler intermediate frequency signal, wherein the characteristic parameter of the fluctuation in the fluctuation signal corresponds to the characteristic of the motion of the object in the detection space; and

and S6, low-pass filtering the fluctuation signal.

It is worth mentioning that the doppler intermediate frequency signal corresponds to the movement of the object in the detection space, and f is the frequency formula of the doppler intermediate frequency signal₀V/c, according to the step S5, if the v value of the moving object is positive (e.g. the velocity of the moving object moving away from the anti-interference microwave detection module is positive), the frequency f of the doppler intermediate frequency signal is positive, if the v value of the object is zero, the frequency f of the doppler intermediate frequency signal is zero, if the v value of the object is negative (e.g. the velocity of the moving object moving close to the anti-interference microwave detection module is negative), the frequency f of the doppler intermediate frequency signal is negative, the trend processing on the doppler intermediate frequency signal can obtain the fluctuation signal corresponding to the motion of the object based on the motion change of the object over time, for example, if the corresponding object is a human body, one thoracic cavity expansion motion of the human body facing the anti-interference microwave detection module in the detection space corresponds to one fluctuation in the fluctuation signal, thus, the characteristic parameter of the fluctuations in the fluctuation signal corresponds to the characteristic of the motion of the object in the detection space.

It is understood that the trend processing on the doppler intermediate frequency signal includes, but is not limited to, trend processing based on the frequency variation of the doppler intermediate frequency signal, for example, the trend processing on the doppler intermediate frequency signal may also be envelope processing to trend processing based on the amplitude variation of the doppler intermediate frequency signal, or trend processing based on the phase variation of the doppler intermediate frequency signal, or trend processing based on the pulse width variation of the doppler intermediate frequency signal, which is not limited by the present invention.

In particular, in step S5, since the trend processing on the doppler intermediate frequency signal is to obtain the fluctuation signal corresponding to the motion of the object based on the motion change of the object over a period of time, the interference signal in the doppler intermediate frequency signal, such as the interference signal corresponding to the high-speed motion of the wind-blown grass and rain-falling tiny objects in the doppler intermediate frequency signal and the interference signal generated based on the test signal in the same frequency band as the RS test and the anti-interference microwave detection module, appears in the fluctuation signal as a short small fluctuation after the doppler intermediate frequency signal is trended into the fluctuation signal, so as to allow the elimination of the high-speed motion of the tiny objects in the detection space and the interference of the electromagnetic radiation similar to the RS test on the wave signal based on the existing signal back noise processing technology, so the anti-interference microwave detection module can resist the high-speed motion interference of the tiny objects and the electromagnetic radiation similar to the RS test Interference, including electromagnetic radiation interference in the same frequency band as the anti-interference microwave detection module in electromagnetic radiation similar to RS test, while guaranteeing the integrality of the fluctuation signal to the feedback of the action of the object in the detection space, the accuracy of the fluctuation signal to the feedback of the action of the object in the detection space is improved, including the accuracy of the feedback of the action of the object in the detection space to the outdoor environment, so that the anti-interference microwave detection module is also suitable for the outdoor environment to detect the moving object (such as an automobile).

Further, in the step S6, based on the frequency of the actual power grid, the low-pass filtering process on the fluctuation signal satisfies that the frequency of the fluctuation signal after the low-pass filtering process is lower than 50Hz or 60Hz, wherein the fluctuation signal after the low-pass filtering process is not directly interfered by the electromagnetic radiation of the existing environment and the circuit because the electromagnetic radiation below the frequency of the power grid does not exist in the existing environment and the corresponding electric signal below the frequency of the power grid does not exist in the anti-jamming microwave detection module, thereby allowing the fluctuation signal after the low-pass filtering process to be amplified to a required multiple without affecting the accuracy of the feedback of the fluctuation signal to the action of the object in the detection space.

That is, the tamper resistant method of the tamper resistant microwave detection module further comprises, after the step S6, the steps of:

and S7, amplifying the fluctuation signal.

Since the frequency of the fluctuation signal after the low-pass filtering in step S6 is lower than the frequency of the actual power supply grid, the fluctuation signal after the low-pass filtering is not directly interfered by the electromagnetic radiation and the circuit of the existing environment, so that the amplification of the fluctuation signal in step S7 does not interfere with the accuracy of the fluctuation signal when the amplified fluctuation signal is suitable for being recognized and processed by the corresponding circuit module by amplifying the fluctuation signal, which is beneficial to improving the recognition and accuracy of the feedback of the fluctuation signal to the micro-motion, such as the recognition and accuracy of the feedback of the body micro-motion during the respiration and heartbeat of the human body, by amplifying the fluctuation signal.

It is worth mentioning that, in the step S6, since the frequency of the low-pass filtered fluctuation signal is lower than the frequency of the actual power supply grid, and the frequency of the typical human body activity action is lower than 50Hz, the low-pass filtered fluctuation signal can completely feed back the human body activity action in the detection space.

In particular, the corresponding motion frequency based on the duration transition of each jogging motion of the human body in the normal state, such as walking, swing arm, body/head shaking motion, is less than 25Hz, the resting respiratory frequency of an adult is generally 0.2-0.4 times/second, the heart rate of a normal adult is 1.0-1.7 times/second, most of 1.0-1.3 times/second, and the heart rate of a normal child (under 3 years old) is more than 1.3 times/second, and usually less than 2.5 times/second, so in the step S6, when the low-pass filtering process of the fluctuation signal satisfies that the frequency of the fluctuation signal after the low-pass filtering process is less than 25Hz, the interference of the object motion different from the human body motion in the detection space to the fluctuation signal can be reduced.

That is, in the step S6, when the low-pass filtering process of the fluctuation signal is performed such that the frequency of the fluctuation signal after the low-pass filtering process is lower than 25Hz, the fluctuation of 3Hz or more in the fluctuation signal corresponds to the inching action of the human body with a high probability, the fluctuation of 1Hz to 3Hz in the fluctuation signal corresponds to the heartbeat action of the human body with a high probability, and the fluctuation of 1Hz or less in the fluctuation signal corresponds to the breathing action of the human body with a high probability. That is, in the step S6, when the low-pass filtering process on the fluctuation signal satisfies that the frequency of the fluctuation signal after the low-pass filtering process is 1Hz or less, the fluctuation in the fluctuation signal corresponds to the breathing action of the human body with a high probability, when the low-pass filtering process on the fluctuation signal satisfies that the frequency of the fluctuation signal after the low-pass filtering process is between 1Hz and 3Hz, the fluctuation in the fluctuation signal corresponds to the heartbeat action of the human body with a high probability, and when the low-pass filtering process on the fluctuation signal satisfies that the frequency of the fluctuation signal after the low-pass filtering process is less than 25Hz, the fluctuation in the fluctuation signal corresponds to the human body inching action with a high probability.

It is worth mentioning that in the anti-interference method of the anti-interference microwave detection module of the present invention, wherein in said step S5, the trending of the Doppler intermediate frequency signal is preferably effected by at least one Butterworth low-pass filter to determine, by an integral characteristic of the Butterworth low-pass filter, in the trend processing process of the Doppler intermediate frequency signals, interference signals corresponding to high-speed movement of wind-blown grass and rain tiny objects in the Doppler intermediate frequency signals are processed, and interference signals generated based on the RS test and the test signals of the same frequency band of the anti-interference microwave detection module are presented in the fluctuation signals in short-term small fluctuation, thereby allowing to exclude the interference of the high-speed movement of the tiny objects in the detection space and the electromagnetic radiation similar to the RS test to the wave signal based on the existing signal back noise processing technology.

In particular, in the anti-jamming method of the anti-jamming microwave detection module of the present invention, wherein in the step S6, the low-pass filtering process of the wobble signal is further implemented by the butterworth low-pass filter, that is, the trending process of the doppler intermediate frequency signal and the low-pass filtering process of the wobble signal can be implemented in the step S5 and the step S6 by the butterworth low-pass filter, respectively, so that the method is simple and easy to implement.

It should be understood by those skilled in the art that, in the anti-jamming method of the anti-jamming microwave detection module of the present invention, in the step S6, the low-pass filtering process of the fluctuation signal can be additionally implemented by a low-pass filter, without limiting the use of the butterworth low-pass filter, which is not limited by the present invention.

For the realization anti-interference method of anti-interference microwave detection module, refer to the utility model discloses an it is shown in figure 1 of the description attached drawing, the utility model discloses an anti-interference microwave detection module's of an embodiment structural block diagram is illustrated, wherein based on this embodiment anti-interference microwave detection module, anti-interference microwave detection module anti-interference method can realize. In detail, the microwave detection module against interference includes an oscillation circuit 10, a mixer-detector unit 20, a transmitter unit 30, a receiver unit 40, a frequency-selector unit 50 and a wobble signal converter unit 60, wherein the oscillation circuit 10 is respectively coupled to the mixer-detector unit 20 and the transmitter unit 30, and is configured to be powered to generate the excitation signal to provide the excitation signal to the mixer-detector unit 20 and the transmitter unit 30, wherein the transmitter unit 30 transmits the probe beam in the detection space under excitation of the excitation signal, wherein the receiver unit 40 receives the echo formed by reflection of the probe beam by at least one object in the detection space to generate the echo signal, wherein the frequency-selector unit 50 is coupled between the mixer-detector unit 20 and the receiver unit 40, transmitting the echo signal to the mixed detection unit 20 with a frequency selection, wherein the mixed detection unit 20 performs mixed detection on the excitation signal and the echo signal to generate the doppler intermediate frequency signal corresponding to the frequency difference between the excitation signal and the echo signal based on the doppler effect principle, wherein the fluctuation signal conversion unit 60 is electrically connected to the mixed detection unit 20 to receive the doppler intermediate frequency signal and output the fluctuation signal based on the variation trend of the doppler intermediate frequency signal, and then the fluctuation in the fluctuation signal corresponds to the movement of the object in the detection space.

Specifically, the receiving unit 40 includes a radiation source 41 and a reference ground 42, wherein the radiation source 41 and the reference ground 42 are spaced apart to equivalently form a capacitor C₀Wherein the radiation source 41 has a feeding point 411, wherein the frequency selecting unit 50 includes at least one equivalent capacitor 51 and at least one equivalent inductor 52, wherein at least one equivalent capacitor 51 is electrically connected between the mixer-detector unit 20 and the feeding point 411 of the radiation source 41, wherein the frequency selecting unit 50 is coupled between the mixer-detector unit 20 and the receiving unit 40, and the circuit coupling structure of the frequency selecting unit 50 between the mixer-detector unit 20 and the receiving unit 40 satisfies: the equivalent capacitor 51, the equivalent inductor 52 and the capacitor C₀The frequency selection network is a circuit which selectively allows an electric signal of a specific frequency interval to pass through, and correspondingly, the specific frequency interval is a frequency interval containing the frequency of the excitation signal, for example, the electric signal of the specific frequency interval is selectively allowed to pass through by the high impedance characteristic of the electric signal of all or part of the frequency interval deviating from the frequency of the excitation signal, or the electric signal of the specific frequency interval is selectively allowed to pass through by the low impedance attenuation to the ground of the electric signal of all or part of the frequency interval deviating from the frequency of the excitation signal, so that the selection characteristic of the electric signal of the specific frequency interval containing the frequency of the excitation signal by the frequency selection network is formed. Specifically, the present invention provides a circuit coupling structure between the frequency selecting unit 50 and the mixing detection unit 20 and the receiving unit 40 to form at least one resonant circuit with selective characteristics for the electric signals in the specific frequency range, or at least one filter (including a high pass filter composed of at least one resonant circuit), thereby forming a structure that selectively allows the electric signals in the specific frequency range to pass throughThe frequency-selective network is configured to frequency-selectively transmit the echo signal to the mixing detection unit 20 from the receiving unit 40 based on the selection characteristic of the frequency-selective network to the electrical signal in the specific frequency interval, which is not limited by the present invention.

That is, the circuit coupling structure of the frequency selecting unit 50 between the mixing detection unit 20 and the receiving unit 40 is satisfied to form the frequency selecting network between the mixing detection unit 20 and the receiving unit 40, wherein the frequency selecting unit 50 includes at least one equivalent capacitor 51 and at least one equivalent inductor 52, and the specific coupling relationship between the equivalent capacitor 51 and the equivalent inductor 52 between the mixing detection unit 20 and the receiving unit 40 is not limited as long as the equivalent capacitor 51, the equivalent inductor 52 and the capacitor C are connected in series₀For example, a series resonant circuit is formed by a series capacitor 51 and a series inductor 52 connected in series to form the frequency-selecting network, or a parallel resonant circuit is formed by a parallel inductor 52 and a parallel capacitor 51 to form the frequency-selecting network, or a parallel inductor 52 and a parallel capacitor C are connected in parallel to form the frequency-selecting network₀A parallel resonant loop formed by parallel connection to form the frequency-selective network, or the equivalent inductor 52 and the capacitor C₀A series resonant circuit formed in series to form the frequency-selective network, or the equivalent capacitor 51 and the capacitor C₀At least one of the equivalent inductors 52 and the equivalent inductor 52 form a series of parallel resonant circuits to form the frequency-selective network, so that in the step S3 of the anti-jamming method of the anti-jamming microwave detection module, the echo signal is frequency-selected and processed by the frequency-selective characteristic of the frequency-selective network, which is not limited by the present invention.

It should be mentioned that, the equivalent capacitor 51 and the equivalent inductor 52 are components and parts respectively having capacitance characteristics and inductance characteristics under the high-frequency current corresponding to the frequency of the excitation signal, that is, the equivalent capacitor 51 is components and parts having capacitance characteristics and equivalent to capacitance under the high-frequency current corresponding to the frequency of the excitation signal, such as mutually spaced microstrip lines or high-frequency capacitors, the equivalent inductor 52 is components and parts having inductance characteristics and equivalent to inductance under the high-frequency current corresponding to the frequency of the excitation signal, such as inductance, microstrip lines or resistance, that is, a conductor having a certain resistance, which is not limited by the present invention.

In particular, it should be understood by those skilled in the art that the oscillating circuit 10, the transmitting unit 30 and the receiving unit 40 should satisfy a certain impedance matching relationship, and when the oscillating circuit 10, the transmitting unit 30 and the receiving unit 40 satisfy a certain impedance matching relationship, a frequency selection range of the frequency selection network is mainly affected by the equivalent capacitor 51 and the equivalent inductor 52, wherein in order to reduce the precision requirement on the equivalent capacitor 51 and the equivalent inductor 52, i.e. reduce the precision requirement on the frequency selection unit 50 to reduce the cost of the anti-interference microwave detection module, the frequency selection network preferably satisfies a frequency range in which the frequency of the echo signal processed by the frequency selection network is greater than 1Ghz and includes the frequency band of the excitation signal, for example, the frequency selection network is a high pass filter having the limiting characteristic of 1Ghz and below, or the frequency-selective network is a high-pass filter with a limiting characteristic of signals with frequencies of 2Ghz and below, as long as the frequency of the echo signal subjected to frequency-selective processing by the frequency-selective network is greater than 1Ghz and includes a frequency interval of the frequency band in which the excitation signal is located, that is, in step S3, the frequency-selective processing of the echo signal preferably satisfies that the frequency of the echo signal subjected to frequency-selective processing is greater than 1 Ghz.

Further, the fluctuation signal conversion unit 60 is implemented as an analog filter or a digital filter having trend processing characteristics, or a combination of a digital filter and an analog filter, wherein the trend processing of the doppler intermediate frequency signal by the fluctuation signal conversion unit 60 includes, but is not limited to, trend processing based on frequency variation of the doppler intermediate frequency signal, such as trend processing of the doppler intermediate frequency signal by the fluctuation signal conversion unit 60 may also be trend processing based on amplitude variation of the doppler intermediate frequency signal, trend processing based on phase variation of the doppler intermediate frequency signal, and trend processing based on pulse width variation of the doppler intermediate frequency signal.

Preferably, the fluctuation signal conversion unit 60 is implemented as at least one of the butterworth filters to realize the trend processing of the doppler intermediate frequency signal by the integration characteristic of the butterworth low-pass filter, and simultaneously realize the low-pass filtering processing of the fluctuation signal.

Further, the anti-jamming microwave detection module further comprises at least one amplifying unit 70, wherein the amplifying unit 70 is configured to be electrically connected to the fluctuation signal converting unit 60 corresponding to the step S7 of amplifying the fluctuation signal.

In particular, in this embodiment of the present invention, the amplifying unit 70 is further disposed between the mixing detection unit 20 and the fluctuation signal conversion unit 60, so as to amplify the doppler intermediate frequency signal by the amplifying unit 70. That is, in some embodiments of the interference rejection method of the interference rejection microwave detection module of the present invention, the method further comprises, between step S4 and step S5:

and S41, amplifying the Doppler intermediate frequency signal.

It will be appreciated by those skilled in the art that, based on the tamper-resistant microwave detection module of the above-described embodiments, the tamper-resistant method of the tamper-resistant microwave detection module is implemented, wherein the frequency-selective processing of the echo signal is based on the frequency-selective network formed by the receiving unit 40 and the frequency-selective unit 50, and the trend processing of the doppler intermediate frequency signal and the low-pass filtering processing of the fluctuation signal by the fluctuation signal conversion unit 60, the anti-interference microwave detection module can resist the high-speed motion interference of a tiny object and the electromagnetic radiation interference similar to RS test, and comprises the electromagnetic radiation interference similar to RS test and the electromagnetic radiation interference with the same frequency band as the anti-interference microwave detection module in the electromagnetic radiation, namely, the corresponding anti-interference microwave detection module has anti-interference performance which can be authenticated by the current RS test and can resist the high-speed motion interference of tiny objects. The feedback integrity of the motion of the object in the detection space by the fluctuation signal is guaranteed, and meanwhile, the feedback accuracy of the motion of the object in the detection space by the fluctuation signal is improved.

In particular, the low-pass filtering process of the fluctuation signal by the fluctuation signal conversion unit 60 satisfies that the frequency of the fluctuation signal after the low-pass filtering process is lower than 50Hz or 60Hz based on the frequency of the actual power supply grid, so that the fluctuation signal after the low-pass filtering process is not directly interfered by the electromagnetic radiation and the circuit of the existing environment, and the identifiability and accuracy of the feedback of the fluctuation signal to the micro-motion, such as the identifiability and accuracy of the feedback of the body micro-motion during the respiration and the heartbeat of the human body, are improved in a manner of allowing the fluctuation signal to be amplified by the amplification unit 70.

It is worth mentioning that when the low-pass filtering processing of the fluctuation signal by the fluctuation signal conversion unit 60 is performed such that the frequency of the fluctuation signal after the low-pass filtering processing is lower than 25Hz, the interference of the motion of the object different from the motion of the human body in the detection space on the fluctuation signal can be reduced while the integrity and the accuracy of the feedback of the fluctuation signal on the motion of the human body in the detection space are ensured.

It should be understood by those skilled in the art that the anti-interference microwave detection module of the above embodiments is taken as an example to realize the present invention, and the anti-interference method of the anti-interference microwave detection module does not constitute the limitation of the anti-interference method of the anti-interference microwave detection module and the anti-interference microwave detection module of the present invention. Wherein based on the anti-interference method of the anti-interference microwave detection module, the anti-interference microwave detection module has multiple deformations, for example, in some embodiments of the present invention, the transmitting unit 30 and the receiving unit 40 are integrated into a whole, that is, the receiving unit 40 transmits the detection beam in the detection space under the excitation of the excitation signal through the feeding point 411, and receives the echo formed by the reflection of at least one object of the detection beam in the detection space to generate the echo signal, which is not limited by the present invention.

Further, the anti-jamming microwave detection module further includes a control unit 80 and an execution unit 90, wherein the control unit 80 is electrically connected between the execution unit 90 and the fluctuation signal conversion unit 60, so as to receive the fluctuation signal and control the execution unit 90 according to the fluctuation signal.

Referring to fig. 2 to 14 of the drawings of the specification of the present invention, based on the anti-interference method of the anti-interference microwave detection module, the present invention discloses a partial equivalent circuit structure of the anti-interference microwave detection module in different embodiments, which mainly shows that the frequency selecting unit 50 is in a different circuit coupling structure between the receiving unit 40 and the mixing detection unit 20, and particularly, in these embodiments of the present invention, the transmitting unit 30 and the receiving unit 40 are integrated as a whole, specifically, the receiving unit 40 transmits the detection beam in the detection space through the feeding point 411 under the excitation of the excitation signal, and receives the detection beam formed by the reflection of at least one object in the detection space to generate the echo signal.

Further, referring to fig. 2 of the drawings of the specification of the present invention, an embodiment of the present invention is disclosed, in which the frequency selecting unit 50 includes one equivalent capacitor 51 and one equivalent inductor 52, one end of the equivalent capacitor 51 is electrically connected to the frequency mixing detection unit 20, the other end of the equivalent capacitor 51 is electrically connected to one end of the equivalent inductor 52, the other end of the equivalent inductor 52 is electrically connected to the feeding point 411 of the receiving unit 40, so that a series resonant loop formed by connecting the equivalent capacitor 51 and the equivalent inductor 52 in series is formed between the feeding point 411 of the receiving unit 40 and the frequency mixing detection unit 20, and the frequency selecting characteristic of the series resonant loop is used to frequency-select and transmit the echo signal from the receiving unit 40 to the frequency mixing detection unit 20 A wave detecting unit 20.

In detail, the oscillation circuit 10 includes a three-pole circuit processor 11, a first capacitor 12, a second capacitor 13, a third capacitor 14, a first resistor 15 and a second resistor 16, wherein the three-pole circuit processor 11 has a first connection terminal 111, a second connection terminal 112 and a third connection terminal 113 that is grounded, wherein the first capacitor 12 is electrically connected between the first connection terminal 111 and the second connection terminal 112 of the three-pole circuit processor 11, wherein the second capacitor 13 is electrically connected between the second connection terminal 112 and the third connection terminal 113 of the three-pole circuit processor 11, wherein the third capacitor 14 is electrically connected between the first connection terminal 111 and the third connection terminal 113 of the three-pole circuit processor 11, wherein the second resistor 16 is electrically connected between the first connection terminal 111 and the second connection terminal 112 of the three-pole circuit processor 11, wherein one end of the first resistor 15 is electrically connected to the first connection end 111 of the three-pole circuit processor 11, wherein when the three-pole circuit processor 11 is configured as a triode, the first connection end 111 is a collector of the triode, the second connection end 112 is a base of the triode, and the third connection end 113 is an emitter of the triode, wherein when the three-pole circuit processor 11 is configured as a MOS transistor, the first connection end 111 is a drain of the MOS transistor, the second connection end 112 is a gate of the MOS transistor, and the third connection end 113 is a source of the MOS transistor, so that when the oscillation circuit 10 is powered at the other end of the first resistor 15, the oscillation circuit 10 can provide the excitation signal at the second connection end 112 of the three-pole circuit processor 11.

Further, the mixing detection unit 20 includes two diodes 21 connected end to end, wherein the other ends of the two diodes 21 are grounded, wherein the mixing detection unit 20 is electrically coupled to the second connection terminal 112 of the three-pole circuit processor 11 of the oscillation circuit 10 through a coupling capacitor 100 from between the two diodes 21 connected end to end, and wherein the series resonant loop formed by the frequency selection unit 50 and the feeding point 411 between the two diodes 21 connected end to end of the mixing detection unit 20 are electrically coupled to the receiving unit 40. In this way, the mixer-detector unit 20 can mix-detect the excitation signal and the echo signal frequency-selectively processed by the series resonant tank.

It is worth mentioning that, in this embodiment of the present invention, the first capacitor 12, the second capacitor 13, the third capacitor 14 and the coupling capacitor 100 is the components and parts that have the capacitance characteristic under the high frequency current effect, therefore, the first capacitor 12, the second capacitor 13, the third capacitor 14 and the coupling capacitor 100 are in can be implemented as the microstrip line or the high frequency capacitor of mutual interval in the anti-interference microwave detection module, the present invention does not limit this.

Referring further to fig. 3 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 2, in this embodiment of the present invention, the frequency selecting unit 50 further includes a resistor 53, wherein the resistor 53 is connected in parallel with the equivalent inductor 52, it can be understood that the resistor 53 has an inductance characteristic under a high frequency current corresponding to the frequency of the excitation signal, that is, the resistor 53 is equivalent to an equivalent inductor 52 under a high frequency current corresponding to the frequency of the excitation signal, so that the parallel resistor 53 and the equivalent inductor 52 can equivalently form an inductor and form the series resonant loop with the equivalent capacitor 51.

Referring further to fig. 4 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 2, in this embodiment of the present invention, the frequency selecting unit 50 further includes a resistor 53, wherein the resistor 53 is electrically connected between the equivalent inductor 52 and the feeding point 411, so as to form a series circuit structure with the equivalent capacitor 51 and the equivalent inductor 52, wherein since the resistor 53 has an inductance characteristic at a high frequency current corresponding to the frequency of the excitation signal, the equivalent capacitor 51, the equivalent inductor 52 and the resistor 53 connected in series can also form the series resonant circuit.

It is to be understood that, in this embodiment of the present invention, the resistor 53 can also be connected in series between the equivalent capacitor 51 and the equivalent inductor 52, which is not limited by the present invention.

Referring further to fig. 5 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from that shown in fig. 2, the partial equivalent circuit structure of the anti-interference microwave detection module in this embodiment of the present invention, the frequency selecting unit 50 further includes an equivalent capacitor 51A, wherein the equivalent capacitor 51A is connected in parallel to the equivalent inductor 52, so that the equivalent inductor 52 can form a series parallel resonant circuit with the equivalent capacitor 51 and the equivalent capacitor 51A.

Referring further to fig. 6 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from that shown in fig. 5, the partial equivalent circuit structure of the anti-interference microwave detection module, in this embodiment of the present invention, the frequency selecting unit 50 further includes a resistor 53, wherein the resistor 53 is connected in parallel to the equivalent capacitor 51A, so that the resistor 53, the equivalent inductor 52, the equivalent capacitor 51 and the equivalent capacitor 51A can also form a series of parallel resonant circuits.

Referring further to fig. 7 of the drawings accompanying the present application, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, in this embodiment of the present invention, the frequency selecting unit 50 includes one equivalent capacitor 51 and one equivalent inductor 52, wherein one end of the equivalent capacitor 51 is electrically connected to the equivalent capacitor 51The other end of the equivalent capacitor 51 is electrically connected to the feeding point 411 of the receiving unit 40, wherein one end of the equivalent inductor 52 is electrically connected to the feeding point 411 of the receiving unit 40, the other end of the equivalent inductor 52 is grounded, and then the equivalent inductor 52 is connected in parallel to the capacitor C equivalently formed by the receiving unit 40₀I.e. the equivalent inductance 52 and the capacitance C₀A parallel resonant loop is formed, wherein the mixing detector unit 20 is coupled to the parallel resonant loop via the equivalent capacitor 51, so that the echo signal can be frequency-selected by the parallel resonant loop and coupled and transmitted to the mixing detector unit 20 via the equivalent capacitor 51.

Referring further to fig. 8 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from that shown in fig. 7. the partial equivalent circuit structure of the anti-interference microwave detection module is provided, in this embodiment of the present invention, the equivalent inductor 52 is set to be a resistor 53, so as to form the equivalent inductor 52 by the inductance characteristic equivalence of the resistor 53 under the high frequency current corresponding to the frequency of the excitation signal.

Referring further to fig. 9 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 7, in this embodiment of the present invention, the frequency selecting unit 50 further includes a resistor 53, wherein the resistor 53 is connected in parallel with the equivalent inductor 52, it can be understood that the resistor 53 has an inductance characteristic under a high frequency current corresponding to the frequency of the excitation signal, that is, the resistor 53 is equivalent to the equivalent inductor 52 under a high frequency current corresponding to the frequency of the excitation signal, so that the resistor 53 and the equivalent inductor 52 connected in parallel can equivalently form an inductor and are connected with the capacitor C₀Forming a parallel resonant tank.

Further reference is made to the inventionFig. 10 of the drawings of the specification shows that, according to another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 7. in this embodiment of the present invention, the frequency selection unit 50 further includes an equivalent capacitor 51A, wherein the equivalent capacitor 51A is connected in parallel to the equivalent inductor 52, and then the equivalent inductor 52, the equivalent capacitor 51A and the capacitor C are connected in parallel₀Forming a parallel resonant tank.

Referring further to fig. 11 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from that shown in fig. 7, the partial equivalent circuit structure of the anti-interference microwave detection module is in this embodiment of the present invention, the frequency selecting unit 50 further includes an equivalent capacitor 51A, wherein the equivalent capacitor 51A is connected to the equivalent inductor 52 and the receiving unit 40 between the feeding points 411, then the equivalent capacitor 51A and the equivalent inductor 52 are connected in series to form a series resonant loop, and further with the capacitor C₀The parallel connection forms a series parallel resonant circuit.

Referring further to fig. 12 of the drawings accompanying the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-interference microwave detection module is disclosed, which is different from the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 11. in this embodiment of the present invention, the frequency selection unit 50 further includes a resistor 53, wherein the resistor 53 is electrically connected between the equivalent capacitor 51A and the feeding point 411 of the receiving unit 40, and then the resistor 53, the equivalent inductor 51A and the equivalent inductor 52 are serially connected in sequence to form a series resonant loop, and further with the capacitor C₀The parallel connection forms a series parallel resonant circuit.

Referring further to fig. 13 of the drawings accompanying the present application, in accordance with another embodiment of the present invention, the anti-interference microwave detection module is partially equivalent to an electric currentThe circuit structure is disclosed, which is different from the partial equivalent circuit structure of the anti-jamming microwave detection module shown in fig. 10, in this embodiment of the present invention, the frequency selection unit 50 further includes an equivalent inductor 52A, wherein the equivalent inductor 52A is electrically connected between the equivalent capacitor 51 and the feeding point 411 of the receiving unit 40, specifically, one end of the equivalent inductor 52A is connected to the equivalent capacitor 51, and the other end of the equivalent inductor 52A is connected to the feeding point 411 and the equivalent inductor 52, that is, the equivalent inductor 52A is electrically connected between the equivalent capacitor 51 and the feeding point 411 and is connected in series with the equivalent capacitor 51, so that the equivalent inductor 52A and the equivalent capacitor 51 are connected in series between the mixing detection unit 20 and the feeding point 411 of the receiving unit 40 to form a series resonant loop, wherein the equivalent inductor 52, the equivalent capacitor 51A and the capacitor C are connected in parallel₀Forming a parallel resonant tank.

Referring further to fig. 14 of the drawings of the specification of the present invention, in another embodiment of the present invention, a partial equivalent circuit structure of the anti-jamming microwave detecting module is disclosed, which is different from the partial equivalent circuit structure of the anti-jamming microwave detecting module shown in fig. 13, in this embodiment of the present invention, one end of the equivalent capacitor 52 is electrically connected between the equivalent capacitor 51 and the equivalent inductor 52A, and the other end of the equivalent capacitor 52 is grounded, that is, the equivalent inductor 52A is electrically connected between the equivalent inductor 52 and the feeding point 411 and is connected in series with the equivalent capacitor 51, so that the equivalent inductor 52A and the equivalent capacitor 51 are connected in series between the feeding point 411 of the mixing detection unit 20 and the receiving unit 40 to form a series resonant circuit, and the equivalent inductor 52 is connected in series with the equivalent inductor 52A to form an equivalent structure and simultaneously with the

equivalent capacitors

51A and 51A The capacitor C₀The parallel inductors further form a parallel resonant loop.

Referring further to fig. 15 of the drawings accompanying the present application, in accordance with another embodiment of the present invention, there is provided a partial equivalent circuit structure of the anti-interference microwave detection moduleIt is revealed that, different from the partial equivalent circuit structure of the anti-jamming microwave detection module shown in fig. 14, the equivalent capacitor 51A of the anti-jamming microwave detection module shown in fig. 14 is not set in this embodiment of the present invention, so that the equivalent inductor 52A and the equivalent capacitor 51 are connected in series between the feeding point 411 of the mixing detection unit 20 and the receiving unit 40 to form a series resonant loop, and the equivalent inductor 52 is connected in series with the equivalent inductor 52A to equivalently form a series resonant loop with the capacitor C₀The parallel inductors further form a parallel resonant loop.

That is, since the receiving unit 40 can equivalently form the capacitance C₀Then is connected to the capacitor C₀The equivalent capacitor 51A connected in series or in parallel is equivalent to form a capacitor, so that the equivalent circuit structure of the anti-interference microwave detection module shown in fig. 10 to 14 of the drawings of the specification of the present invention and the capacitor C₀The equivalent capacitor 51A connected in series or in parallel may not be set, so as to form an equivalent implementation manner of the anti-interference microwave detection module corresponding to the embodiment, for example, when the equivalent capacitor 51A of the anti-interference microwave detection module shown in fig. 10 is not set, the anti-interference microwave detection module shown in fig. 10 can be equivalently formed and corresponds to the anti-interference microwave detection module shown in fig. 7, that is, the anti-interference microwave detection module shown in fig. 10 and the anti-interference microwave detection module shown in fig. 7 are equivalent implementations, which is not to be enumerated in this disclosure.

Similarly, the equivalent inductor 52(52A) and the resistor 53 having inductance characteristic under the high-frequency current corresponding to the frequency of the excitation signal, which are connected in series or in parallel, can equivalently form an inductor, so that the partial equivalent circuit structures of the anti-interference microwave detection modules shown in fig. 2 to 15 of the drawings of the specification of the present invention have various equivalent embodiments, which is not limited by the present invention.

Further, different from the partial equivalent circuit structure of each of the anti-jamming microwave detecting modules shown in fig. 2 to 14 of the drawings of the specification of the present invention, in the partial equivalent circuit structure of the anti-jamming microwave detecting module shown in fig. 15 of the drawings of the specification of the present invention, the oscillating circuit 10A includes a three-pole circuit processor 11A, a first capacitor 12A, a second capacitor 13A, a third capacitor 14A, a first resistor 15A, a second resistor 16A, a third resistor 17A and an inductor 18A, wherein the three-pole circuit processor 11A has a first connecting end 111A, a second connecting end 112A and a third connecting end 113A which is grounded, wherein the first capacitor 12A is electrically connected between the first connecting end 111A and the third connecting end 113A of the three-pole circuit processor 11A, wherein one end of the second capacitor 13A is electrically connected to the first connection terminal 111A of the three-pole circuit processor 11A, and the other end of the second capacitor 13A is grounded, wherein one end of the third capacitor 14A is electrically connected to the second connection terminal 112A of the three-pole circuit processor 11A, and the other end of the third capacitor 14A is grounded, wherein the first resistor 15A is electrically connected between the first connection terminal 111A and the second connection terminal 112A of the three-pole circuit processor 11A, one end of the second resistor 16A is electrically connected to the second connection terminal 112A of the three-pole circuit processor 11A, and the other end of the second resistor 16A is grounded, wherein one end of the third resistor 17 is electrically connected to the third connection terminal 113A of the three-pole circuit processor 11A, the other end of the third resistor 17A is grounded, wherein one end of the inductor 18A is electrically connected to the first connection terminal 111A of the three-pole circuit processor 11A, wherein when the three-pole circuit processor 11A is configured as a triode, the first connection terminal 111A is a collector of the triode, the second connection terminal 112A is a base of the triode, and the third connection terminal 113A is an emitter of the triode, wherein when the three-pole circuit processor 11A is configured as a MOS transistor, the first connection terminal 111A is a drain of the MOS transistor, the second connection terminal 112A is a gate of the MOS transistor, and the third connection terminal 113A is a source of the MOS transistor, so that when the oscillation circuit 10A is powered at the other end of the inductor 18A, the oscillation circuit 10A can provide the excitation signal at the third connection terminal 113A of the three-pole circuit processor 11A, that is, the mixer-detector unit 20 is electrically coupled to the third connection terminal 113A of the three-pole circuit processor 11A of the oscillation circuit 10A from between the two end-to-end diodes 21 through the coupling capacitor 100.

It should be noted that, in the partial equivalent circuit structure of the anti-interference microwave detection module shown in fig. 15 of the drawings of the specification of the present invention, the oscillation circuit 10A provides the excitation signal at the third connection 113A of the three-pole circuit processor 11A, wherein since the third connection terminal 113A is the collector of the three-pole circuit processor 11A, i.e., the end of the three-pole circuit processor 11A where the current is collected, the excitation signal is enhanced, i.e., the impedance of the oscillation circuit 10A is lowered, the matching between the oscillation circuit 10A and the receiving unit 40 of low impedance is facilitated, for example, when the resonant tank formed between mixer detector unit 20 and receiver unit 40 by the arrangement of frequency selector unit 50 is grounded, a low impedance between receiver unit 40 and ground is formed.

In particular, when the resonant circuit formed between the mixer-detector unit 20 and the receiver unit 40 by the arrangement of the frequency-selector unit 50 is grounded, the quality factor of the resonant circuit is improved, the frequency-selection interval of the resonant circuit for the electromagnetic radiation in the environment corresponding to the frequency of the anti-jamming microwave detection module is reduced, and the interference of the electromagnetic radiation in the frequency band different from that of the anti-jamming microwave detection module in the environment on the echo signal is reduced.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. An anti-jamming microwave detection module, comprising:

a receiving unit, wherein the receiving unit comprises a radiation source and a reference ground, wherein the radiation source and the reference ground are arranged at intervals to equivalently form a capacitor C₀Wherein the radiation source has a feed point;

a mixer detector unit, wherein the mixer detector unit is coupled to the feeding points of the oscillator circuit and the receiver unit, respectively; and

a frequency selection unit, wherein the frequency selection unit is coupled between the mixer-detector unit and the receiver unit to form a frequency selection network between the mixer-detector unit and the receiver unit, wherein the frequency selection network is a circuit that selectively allows an electrical signal of a specific frequency range to pass through, wherein the specific frequency range is a frequency range including the frequency of the excitation signal, wherein the frequency selection unit includes at least one equivalent capacitor and at least one equivalent inductor, wherein at least one of the equivalent capacitors is electrically connected between the mixer-detector unit and the feeding point of the radiation source, and wherein a circuit coupling structure of the frequency selection unit between the receiver unit and the mixer-detector unit satisfies the equivalent capacitor, the equivalent inductor, and the capacitor C₀Can form said frequency selective network.

2. The tamper resistant microwave detection module of claim 1 wherein the oscillation circuit includes a three pole circuit handler, a first capacitor, a second capacitor, a third capacitor, a first resistor and a second resistor, wherein the three pole circuit handler has a first connection terminal, a second connection terminal and a third connection terminal that is grounded, wherein the first capacitor is electrically connected between the first connection terminal and the second connection terminal of the three pole circuit handler, wherein the second capacitor is electrically connected between the second connection terminal and the third connection terminal of the three pole circuit handler, wherein the third capacitor is electrically connected between the first connection terminal and the third connection terminal of the three pole circuit handler, wherein the second resistor is electrically connected between the first connection terminal and the second connection terminal of the three pole circuit handler, wherein one end of the first resistor is electrically connected to the first connection terminal of the three-pole circuit processor, so that the oscillation circuit can provide the excitation signal at the second connection terminal of the three-pole circuit processor when the oscillation circuit is powered at the other end of the first resistor.

3. The tamper resistant microwave detection module of claim 1 wherein the oscillation circuit includes a three pole circuit handler having a first connection terminal, a second connection terminal, and a third connection terminal grounded, a first capacitor electrically connected between the first connection terminal and the third connection terminal of the three pole circuit handler, a first resistor, a second resistor, a third resistor, and an inductor, wherein one end of the second capacitor is electrically connected to the first connection terminal of the three pole circuit handler and the other end of the second capacitor is grounded, wherein one end of the third capacitor is electrically connected to the second connection terminal of the three pole circuit handler and the other end of the third capacitor is grounded, wherein the first resistor is electrically connected between the first connection terminal and the second connection terminal of the three-pole circuit processor, one end of the second resistor is electrically connected to the second connection terminal of the three-pole circuit processor, and the other end of the second resistor is grounded, wherein one end of the third resistor is electrically connected to the third connection terminal of the three-pole circuit processor, and the other end of the third resistor is grounded, wherein one end of the inductor is electrically connected to the first connection terminal of the three-pole circuit processor, so that the oscillation circuit can provide the excitation signal at the third connection terminal of the three-pole circuit processor when the oscillation circuit is powered at the other end of the inductor.

4. The microwave immunity detection module of claim 2 or 3, wherein the three-pole circuit processor is configured as a transistor, wherein the first connection is a collector of the transistor, the second connection is a base of the transistor, and the third connection is an emitter of the transistor.

5. The anti-jamming microwave detection module according to claim 2 or 3, wherein the three-pole circuit processor is configured as a MOS transistor, wherein the first connection terminal is a drain electrode of the MOS transistor, the second connection terminal is a gate electrode of the MOS transistor, and the third connection terminal is a source electrode of the MOS transistor.

6. The tamper resistant microwave detection module of claim 2 or 3, wherein the tamper resistant microwave detection module further comprises at least one Butterworth low pass filter, wherein the Butterworth low pass filter is electrically connected to the mix detection unit.

7. The antijam microwave probe module of claim 6 wherein one end of at least one of the equivalent inductors is electrically connected to the feed point of the receiving unit and the other end of the equivalent inductor is grounded.

8. The anti-jamming microwave detection module according to claim 7, wherein the equivalent inductance is equivalently formed as a microstrip line.

9. The anti-jamming microwave detection module according to claim 8, wherein the equivalent inductance is equivalently formed by spaced microstrip lines.

10. The tamper-resistant microwave detection module of claim 9 wherein the receiving unit is simultaneously coupled to the oscillation circuit.