High gain microwave Doppler detection module

Abstract

The present invention provides a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module comprises an electromagnetic reflection surface and at least one pair of dual coupling poles arranged at a distance from the electromagnetic reflection surface, wherein the pair of dual coupling poles has a first feeding end and a second feeding end, and a first radiation source pole and a second radiation source pole are respectively extended from the two feeding ends, wherein the first feeding end and the second feeding end are close to each other, and when the first radiation source pole and the second radiation source pole are respectively fed by the same excitation signal feed source at the corresponding feeding ends, the current and potential distribution of the first radiation source pole and the second radiation source pole can be coupled in a dual manner with the midpoint of the connection line of the first feeding end and the second feeding end being in a dual distribution state, thereby reducing the size requirement of the high-gain microwave Doppler detection module and avoiding the formation of a detection dead zone.

Description

Technical Field

[0001] The invention relates to the field of microwave Doppler detection, in particular to a high-gain microwave Doppler detection module. Background Art

[0002] Microwave detection technology based on the Doppler effect principle is an important hub connecting people and objects, and objects and objects. It has unique advantages in behavior detection and existence detection technology. It can detect moving objects without infringing on people's privacy, and therefore has broad application prospects.

[0003] The existing microwave detection modules are mainly divided into a microwave detection module with a columnar radiation source structure and a microwave detection module with a flat radiation source structure according to the structure of the radiation source. Figure 1A and Figure 1B As shown, the structural principles of the existing microwave detection module 10P with a columnar radiation source structure and the microwave detection module 20P with a flat radiation source structure are respectively illustrated, wherein the microwave detection module 10P with a columnar radiation source structure includes a columnar radiation source 11P and a reference ground 12P, wherein the reference ground 12P is provided with a radiation hole 121P, wherein the columnar radiation source 11P vertically penetrates the reference ground 12P through the radiation hole 121P to form a A radiation gap 1211P, so that when the columnar radiation source 11P is fed, the columnar radiation source 11P can couple with the reference ground 12P and form a radiation space 100P from the radiation gap 1211P with the columnar radiation source 11P as the central axis, wherein the radiation space 100P is the coverage range of the electromagnetic wave radiated by the microwave detection module 10P of the columnar radiation source structure, wherein the radiation space 100P is concave at its central axis toward both ends of the columnar radiation source 11P and has a radiation dead zone. Figure 1BThe structural principle of the microwave detection module 20P with a flat-plate radiation source structure is shown, wherein the microwave detection module 20P with a flat-plate radiation source structure includes a flat-plate radiation source 21P and a reference ground 22P, wherein the flat-plate radiation source 21P and the reference ground 22P are arranged in parallel with each other and a radiation gap 23P is formed between the flat-plate radiation source 21P and the reference ground 22P, so that when the flat-plate radiation source 21P is fed, the flat-plate radiation source 21P can couple with the reference ground 22P and form a radiation space from the radiation gap 23P with an axis perpendicular to the physical center point of the flat-plate radiation source 21P as the central axis. It can be understood that, due to the existence of the radiation dead zone, in actual use, such as in vertical detection applications, when the microwave detection module 10P of the columnar radiation source structure is installed in a vertical direction such as a suspended ceiling, a ceiling, and a shed roof for vertical downward detection, the installation position of the microwave detection module 10P of the columnar radiation source structure is usually lowered to reduce or avoid the radiation dead zone of the corresponding radiation space in the space between the microwave detection module and the ground. The detection dead zone. In other words, due to the existence of the radiation dead zone in the microwave detection module 10P of the columnar radiation source structure, the detection distance of the microwave detection module 10P of the columnar radiation source structure in actual use is much smaller than the maximum size of the corresponding radiation space in the direction of the central axis, that is, the detection distance of the existing microwave detection module 10P of the columnar radiation source structure in actual use is much smaller than the detection distance matched with its gain size, and the gain of the existing microwave detection module 10P of the columnar radiation source structure is low, generally around 2dB, which further limits the application of the existing microwave detection module 10P of the columnar radiation source structure in the field of microwave Doppler detection.

[0004] In addition, in terms of structure, since the columnar radiation source 11P of the microwave detection module 10P with a columnar radiation source structure is perpendicular to the reference ground 12P, the microwave detection module 10P with a columnar radiation source structure tends to occupy a larger installation space in actual installation compared to the microwave detection module 20P with a flat plate radiation source structure, and therefore, under the current aesthetic trend of pursuing a small and concise appearance, the microwave detection module with a flat plate radiation source structure is highly favored due to its advantages of small space occupation and relative stability. However, in some application scenarios, the microwave detection module 10P with a columnar radiation source structure has more advantages than the microwave detection module 20P with a flat plate radiation source structure. For example, referring to the drawings of the specification of the present invention, Figure 2As shown, the application of the microwave detection module 10P of the columnar radiation source structure on the LED light board 30P is illustrated, wherein a plurality of LED lamp beads 31P are evenly arranged on one side of the LED light board 30P to form a light-emitting surface on the surface of the LED light board 30P. It can be understood that in order to realize the control of the lighting of the LED light board 30P based on human activities, the existing microwave detection module is applied to the LED light board 30P, and in actual application, the effective electromagnetic wave detection signal should be radiated in the space corresponding to the light-emitting surface of the LED light board 30P. Since the current LED light board 30P is mostly made of conductive aluminum plate, in order to avoid the shielding effect of the conductive LED light board 30P on the electromagnetic wave detection signal, from the perspective of the stability of human activity detection, ideally, the microwave detection module as a human activity detection component should be placed on the light-emitting surface of the LED light board 30P. However, regardless of whether the microwave detection module 10P with a columnar radiation source structure or the microwave detection module 20P with a flat radiation source structure is used, since the minimum extreme value of the area size of the corresponding reference ground 12P and the reference ground 22P is limited, the installation of the microwave detection module 10P with a columnar radiation source structure or the microwave detection module 20P with a flat radiation source structure on the light-emitting surface of the LED light board 30P is bound to occupy part of the installation position of the LED lamp bead 31P or block part of the LED lamp bead 31P, thereby causing the light emitted by the LED light board 30P to produce a dark area.

[0005] Therefore, in order to realize the lighting control of the LED light board 30P based on the detection of human activities, the current method mainly involves setting a through hole 32P on the LED light board 30P without affecting the arrangement of the LED lamp beads 31P, and extending the columnar radiation source 11P of the microwave detection module 10P with a columnar radiation source structure through the through hole 32P through the LED light board 30P on the side of the LED light board 30P opposite to the light-emitting surface, so as to hide the reference ground 12P of the microwave detection module 10P with a columnar radiation source structure on the side of the LED light board 30P opposite to the light-emitting surface, so that the installation of the microwave detection module 10P with a columnar radiation source structure on the LED light board 30P can avoid occupying part of the installation position of the LED lamp beads 31P or blocking part of the LED lamp beads 31P, thereby maintaining the uniformity of the light emitted by the LED light board 30P. However, in actual use, limited by the thinnest thickness of the LED light board 30P and the maximum size of the through hole 32P, the coupling between the columnar radiation source 11P of the microwave detection module 10P with a columnar radiation source structure and the reference ground 12P will be blocked by the LED light board 30P, that is, the corresponding radiation space 100P located on the light-emitting surface of the LED light board 30 will be reduced due to the shielding and reflection effect of the LED light board 30P. Therefore, the stability of the microwave detection module 10P with a columnar radiation source structure applied to the LED light board 30P for detecting human activities is not ideal. And due to the directionality of the bidirectional radiation of the microwave detection module 10P of the columnar radiation source structure and the reflective effect of the LED light board 30P, the corresponding radiation space 100P located on the surface of the LED light board 30P opposite to the light-emitting surface will be enhanced, that is, the radiation energy of the microwave detection module 10P of the columnar radiation source structure on the surface of the LED light board 30P opposite to the light-emitting surface is enhanced. Therefore, when there is a metal object in the space corresponding to the surface of the LED light board 30P opposite to the light-emitting surface, such as the metal shell of the LED light board 30P or the metal pipe in the ceiling space, the microwave detection module 10P of the columnar radiation source structure is easily mistaken for the presence of an active object due to the self-excitation principle, thereby affecting the experience of intelligent control of the LED light board 30P based on detection of human activities.

[0006] That is to say, the existing microwave detection module 10P of the columnar radiation source structure has a low gain, and due to the existence of the radiation dead zone, the detection distance of the existing microwave detection module 10P of the columnar radiation source structure in actual use is much smaller than the detection distance that matches its gain size. In addition, compared with the microwave detection module 20P of the flat radiation source structure, the microwave detection module 10P of the columnar radiation source structure can extend the columnar radiation source 11P to the space outside the shielding space corresponding to the other side of the metal plate through a through hole in a shielding space corresponding to one side of a metal plate, thereby breaking through the shielding space to realize activity detection of the space outside the shielding space, but its detection stability is not ideal. Summary of the invention

[0007] An object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module adopts a dual coupling mode to have a relatively high radiation gain and can avoid forming a detection dead zone.

[0008] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module includes at least one pair of dual coupling poles based on a dual coupling structure, wherein a pair of the dual coupling poles includes a first radiation source pole and a second radiation source pole, wherein the first radiation source pole has a first feeding end and extends with the first feeding end as an end, wherein the second radiation source pole has a second feeding end and extends with the second feeding end as an end, wherein the first feeding end and the second feeding end are close to each other, wherein when the first radiation source pole and the second radiation source pole are respectively fed by the same source at the first feeding end and the second feeding end, the first radiation source pole is coupled from the first feeding end along the first radiation source pole to the corresponding position of the second radiation source pole from the second feeding end along the second radiation source pole, thereby forming a dual coupling mode between the first radiation source pole and the second radiation source pole.

[0009] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the second feeding end and the first feeding end are close to each other and satisfy that the distance between the second feeding end and the first feeding end is less than or equal to λ / 32, and preferably approaches λ / 128, wherein λ is a wavelength parameter corresponding to the frequency of the feeding signal, so that when the first radiation source and the second radiation source are co-source fed at the first feeding end and the second feeding end respectively, the first radiation source and the second radiation source can be coupled with each other, and it is beneficial to reduce the loss of the high-gain microwave Doppler detection module and correspondingly increase the gain of the high-gain microwave Doppler detection module.

[0010] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the second radiation source and the first radiation source are configured to satisfy a line length greater than or equal to λ / 16 from the second feeding end and the first feeding end, and preferably approaching a line length of λ / 4, that is, the size requirement for coupling between the second radiation source and the first radiation source is reduced, which is beneficial to reducing the size of the high-gain microwave Doppler detection module, and when the first radiation source and the second radiation source are co-source fed at the first feeding end and the second feeding end, respectively, to form a dual coupling mode, it is beneficial to ensure the radiation efficiency between the first radiation source and the second radiation source.

[0011] Another object of the present invention is to provide a high-gain microwave Doppler detection module. When the first radiation source and the second radiation source are co-source fed at the first feeding end and the second feeding end respectively, the second radiation source and the first radiation source form a radiation space based on a dual coupling method, wherein the radiation space is the coverage range of the electromagnetic waves radiated by the high-gain microwave Doppler detection module. The radiation space is convex in a direction perpendicular to the connection direction of the first feeding end and the second feeding end based on a dual coupling method to avoid forming a detection dead zone in this direction, which is beneficial to improving the detection stability and applicability of the high-gain microwave Doppler detection module.

[0012] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module adopts a dual coupling method to avoid the formation of a detection dead zone, so that the detection distance of the high-gain microwave Doppler detection module in actual application can be increased to a level matching its gain size.

[0013] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module adopts a dual coupling method and has a relatively high radiation gain, so that the detection distance and / or sensitivity of the high-gain microwave Doppler detection module in practical applications can be further improved.

[0014] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module further has an electromagnetic reflection surface, wherein the first radiation source and the second radiation source are arranged at intervals from the electromagnetic reflection surface in the space corresponding to the electromagnetic reflection surface, so as to form the directional radiation characteristics of the high-gain microwave Doppler detection module and improve the gain of the high-gain microwave Doppler detection module in the directional radiation direction through the reflection characteristics of the electromagnetic reflection surface to electromagnetic waves, so that the high-gain microwave Doppler detection module is suitable for detecting the activities of objects in a directional space, and is conducive to avoiding the self-excitation of the high-gain microwave Doppler detection module and improving the anti-interference performance of the high-gain microwave Doppler detection module.

[0015] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the electromagnetic reflection surface is configured to satisfy that the distance between the electromagnetic reflection surface and the midpoint of the line connecting the first feeding end and the second feeding end is greater than or equal to λ / 32 and less than or equal to λ / 2, and preferably approaches λ / 4, so that the reflection effect of the electromagnetic reflection surface on the radiation from the first radiation source pole and the second radiation source pole toward the electromagnetic reflection surface can be enhanced, thereby facilitating the improvement of the detection distance of the high-gain microwave Doppler detection module.

[0016] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein based on a dual coupling method, the first radiation source and the second radiation source are co-source fed at the first feeding end and the second feeding end, respectively, so that the size requirement for coupling between the second radiation source and the first radiation source is reduced, and the corresponding line length requirement of the second radiation source from the second feeding end along the second radiation source and the line length requirement of the first radiation source from the first feeding end along the first radiation source are reduced, which is conducive to reducing the size of the high-gain microwave Doppler detection module.

[0017] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first radiation source electrode is terminated by the first feeding end, and the second radiation source electrode is terminated by the second feeding end. When the first radiation source electrode and the second radiation source electrode are co-source fed at the first feeding end and the second feeding end respectively, the potential and current of the first radiation source electrode and the second radiation source electrode are simplified in a dual distribution state, thereby helping to simplify the data processing of the high-gain microwave Doppler detection module and improve the stability of the high-gain microwave Doppler detection module.

[0018] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein based on a dual coupling method, the second radiation source has a shape and size corresponding to the first radiation source, so that the first radiation source and the second radiation source are free from the limitation of having a limited area as a reference surface, that is, the shape and size of the first radiation source and the second radiation source have a variety of implementation structures and are not limited to a plate-like structure with a limited area, which is conducive to improving the applicability of the high-gain microwave Doppler detection module.

[0019] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first radiation source pole and the second radiation source pole have flexible and changeable shapes and sizes and are not limited to a plate structure with a limited area. By extending the first radiation source pole and the second radiation source pole out of the corresponding metal plate, the high-gain microwave Doppler detection module is also suitable for the application scenarios of the microwave detection module with the aforementioned columnar radiation source structure, and relative to the microwave detection module with the columnar radiation source structure, the high-gain microwave Doppler detection module has better stability in the corresponding application scenarios.

[0020] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein based on the adjustment of the shapes of the second radiation source and the first radiation source, such as adjusting the shapes of the second radiation source and the first radiation source in a bending manner, while maintaining the line length requirement of the second radiation source from the second feeding end along the second radiation source and the line length requirement of the first radiation source from the first feeding end along the first radiation source, the size of the high-gain microwave Doppler detection module can be further reduced, that is, while ensuring the coupling between the second radiation source and the first radiation source in a dual manner, the applicability of the high-gain microwave Doppler detection module is improved.

[0021] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein based on the adjustment of the shapes of the first radiation source pole and the second radiation source pole, or the adjustment of the positional relationship between the first radiation source pole and the second radiation source pole, the radiation space can be adjusted to correspondingly change the coverage range of the electromagnetic waves radiated by the high-gain microwave Doppler detection module, thereby improving the applicability of the high-gain microwave Doppler detection module.

[0022] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein based on the adjustment of the shape of the second radiation source and the first radiation source, such as setting the second radiation source and the first radiation source to extend in opposite directions in the direction of the line connecting the first feeding point and the second feeding point, and to extend in the same direction close to the electromagnetic reflection surface, so as to form a state in which the end of the first radiation source opposite to the first feeding end is close to the electromagnetic reflection surface relative to the first feeding end, and a state in which the end of the second radiation source opposite to the second feeding end is close to the electromagnetic reflection surface relative to the second feeding end, the corresponding radiation space can be adjusted to have a circular shape in the cross section perpendicular to the directional radiation direction, which is beneficial to improve the applicability of the high-gain microwave Doppler detection module for detecting the activities of objects in directional space in different application places.

[0023] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first radiation source and the second radiation source are symmetrically arranged at the midpoint of the line connecting the first feeding end and the second feeding end, that is, the first radiation source and the second radiation source have the same shape and size and are symmetrically arranged at the midpoint of the line connecting the first feeding end and the second feeding end, so as to facilitate the coupling between the second radiation source and the first radiation source in a dual manner

[0024] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module further includes a circuit substrate and a circuit unit carried by the circuit substrate, wherein the circuit unit includes an oscillation circuit unit and a mixer detection unit, wherein the first radiation source pole and the second radiation source pole are electrically coupled to different poles of the oscillation circuit unit at the first feeding end and the second feeding end respectively, wherein the mixer detection unit is electrically coupled to the oscillation circuit unit and the dual coupling pole, so that when the oscillation circuit unit is powered, the first radiation source pole and the second radiation source pole are co-source fed by the oscillation circuit unit and coupled in a dual manner to emit a detection beam and receive an echo of the detection beam, and the mixer detection unit outputs an intermediate frequency signal corresponding to the frequency difference between the detection beam and the echo, then based on the Doppler effect principle, the intermediate frequency signal corresponds to the movement of the corresponding object that reflects the detection beam to form the echo, so the high-gain microwave Doppler detection module is suitable for detecting object movement.

[0025] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the electromagnetic reflection surface is carried on a side of the circuit substrate opposite to a side carrying the circuit unit, that is, the electromagnetic reflection surface faces the dual coupling poles and is blocked between the circuit unit and the dual coupling poles, so as to hinder the interference of the electromagnetic radiation generated by the coupling of the first radiation source pole and the second radiation source pole to the circuit unit through the reflection characteristics of the electromagnetic reflection surface to the electromagnetic radiation, which is beneficial to improving the anti-interference performance of the high-gain microwave Doppler detection module.

[0026] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module further includes a first feed line and a second feed line, wherein the first radiation source is electrically coupled to the oscillation circuit unit at the first feed end via the first feed line, wherein the second radiation source is electrically connected to the ground potential of the oscillation circuit unit at the second feed end via the second feed line, thereby forming a circuit connection relationship in which the first radiation source and the second radiation source are electrically coupled to different poles of the oscillation circuit unit at the first feed end and the second feed end respectively, and the first feed line and the second feed line support the first radiation source and the second radiation source to form a structural relationship in which the dual coupling poles are arranged in the space corresponding to the electromagnetic reflection surface and are spaced apart from the electromagnetic reflection surface.

[0027] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first feed line has a first feed section, wherein the second feed line has a second feed section, wherein the first feed section and the second feed section are parallel to each other and extend from the first feed end and the second feed end respectively, then the distance between the first feed section and the second feed section corresponds to the distance between the first feed end and the second feed end, which satisfies the range of less than or equal to λ / 32, and preferably tends to λ / 128, so that the coupling effect between the first feed section and the second feed section can be reduced, which is beneficial to reducing the loss of the first feed line and the second feed line, that is, reducing the return loss S11 of the first feed line and the second feed line, which is beneficial to further improve the gain of the high-gain microwave Doppler detection module.

[0028] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first feed line further has a first coupling section integrally extending to the first feed section, wherein the second feed line further has a second coupling section integrally extending to the second feed section, that is, the first feed section is electrically coupled to the oscillation circuit unit and fixedly coupled to the circuit substrate via the first coupling section, and the second feed section is electrically coupled to the ground potential of the oscillation circuit unit and fixedly coupled to the circuit substrate via the second coupling section, wherein the first coupling section integrally extends to the first feed section in a direction deviating from the first feed section, and the second coupling section integrally extends to the second feed section in a direction deviating from the second feed section, so that the first coupling section and the second coupling section are designed and arranged by the length and shape of the first coupling section and the second coupling section. The lengths of the first feed line and the second feed line are conducive to maintaining the distance from the midpoint of the line connecting the first feeding end and the second feeding end to the electromagnetic reflection surface within an appropriate range based on the shape design of the first coupling segment and the second coupling segment while satisfying the impedance matching and corresponding resonant frequency design of the high-gain microwave Doppler detection module based on the corresponding length settings of the first feed line and the second feed line. That is, based on the length and shape design of the first coupling segment and the second coupling segment, the high-gain microwave Doppler detection module can satisfy the corresponding impedance matching and resonant frequency design, and the reflection effect of the electromagnetic reflection surface on the radiation from the first radiation source pole and the second radiation source pole to the electromagnetic reflection surface can be enhanced, which is conducive to improving the detection distance of the high-gain microwave Doppler detection module.

[0029] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first coupling section and the second coupling section extend integrally to the first feeding section and the second feeding section respectively in directions away from each other, so that the first feeding section and the second feeding section are parallel to each other and close to each other within a distance less than or equal to λ / 32, which is conducive to electrically coupling the first feeding line to the oscillation circuit unit and fixedly coupled to the circuit substrate in a welding manner, and electrically coupling the second feeding line to the ground potential of the oscillation circuit unit and fixedly coupled to the circuit substrate in a welding manner.

[0030] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module further includes a fixing seat, wherein the fixing seat is attached to a side of the circuit substrate bearing the electromagnetic reflection surface, wherein the first feed line and the second feed line are partially clamped and fixed to the fixing seat, so as to help maintain the first feed segment and the second feed segment in a state of being parallel to each other and close to each other within a distance less than or equal to λ / 32, and further help maintain the consistency of the high-gain microwave Doppler detection module during the production process and the stability during use.

[0031] To achieve at least one of the above objectives, the present invention provides a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module comprises:

[0032] At least one pair of dual coupled poles, wherein the pair of dual coupled poles comprises a first radiation source pole and a second radiation source pole, wherein the first radiation source pole has a first feeding end and is configured as a conductor extending with the first feeding end as an end, wherein the second radiation source pole has a second feeding end and is configured as a conductor extending with the second feeding end as an end, wherein the first radiation source pole and the second radiation source pole are respectively adapted to be fed by the same excitation signal feed source at the first feeding end and the second feeding end, wherein the first feeding end and the second feeding end are close to each other within a distance range of less than or equal to λ / 32, wherein λ is a wavelength parameter corresponding to the feeding signal frequency of the excitation signal feed source, wherein the first radiation source pole is configured to be full The first feeding end has a line length greater than or equal to λ / 16 and less than or equal to λ, wherein the second radiation source is configured to satisfy a line length greater than or equal to λ / 16 and less than or equal to λ from the second feeding end, so that when the first radiation source and the second radiation source are fed by the same excitation signal feed source at the first feeding end and the second feeding end respectively, the current and potential distributions of the first radiation source and the second radiation source can be in a dual distribution state with the midpoint of the line connecting the first feeding end and the second feeding end, so that the first radiation source is coupled to the corresponding position of the second radiation source along the first radiation source from the first feeding end along the second radiation source from the second feeding end; and

[0033] An electromagnetic reflection surface, wherein the dual coupling poles are arranged at intervals from the electromagnetic reflection surface in a space corresponding to the electromagnetic reflection surface, wherein the distance between the midpoint of the line connecting the first feeding end and the second feeding end and the electromagnetic reflection surface satisfies being greater than or equal to λ / 32 and less than or equal to λ / 2, wherein the end of the first radiation source opposite to the first feeding end is close to the electromagnetic reflection surface relative to the first feeding end, and the end of the second radiation source opposite to the second feeding end is close to the electromagnetic reflection surface relative to the second feeding end, wherein the first radiation source and the second radiation source both have a size greater than or equal to λ / 32 and less than or equal to λ / 4 in a direction perpendicular to the electromagnetic reflection surface.

[0034] In one embodiment, the high-gain microwave Doppler detection module further includes a circuit unit, wherein the circuit unit includes an oscillation circuit unit and a mixer-detection unit, wherein the mixer-detection unit is electrically coupled to the oscillation circuit unit and the dual coupling pole, wherein the oscillation circuit unit is configured to allow being powered and outputting a feed signal at its feed pole and being grounded at its ground pole to serve as an excitation signal feed source, wherein the first radiation source pole is electrically coupled to the feed pole of the oscillation circuit unit at the first feeding end, wherein the second radiation source pole is electrically connected to the ground pole of the oscillation circuit unit at the second feeding end, so that when the oscillation circuit unit is powered, the first radiation source pole and the second radiation source pole are co-source fed by the oscillation circuit unit at the first feeding end and the second feeding end, respectively.

[0035] In one embodiment, the electromagnetic reflection surface is blocked between the dual coupling poles and the circuit unit.

[0036] In one embodiment, the high-gain microwave Doppler detection module further comprises a circuit substrate, wherein the electromagnetic reflection surface and the circuit unit are carried on the circuit substrate at two opposite surfaces of the circuit substrate.

[0037] In one embodiment, the high-gain microwave Doppler detection module further includes a first feed line and a second feed line, wherein the first radiation source is electrically coupled to the feed of the oscillation circuit unit at the first feed end via the first feed line, and the second radiation source is electrically connected to the ground of the oscillation circuit unit at the second feed end via the second feed line.

[0038] In one embodiment, the first feeding line extends integrally from the first feeding end to the first radiation source, and the second feeding line extends integrally from the second feeding end to the second radiation source.

[0039] In one embodiment, the first feeding line and the second feeding line are columnar straight conductive lines parallel to each other.

[0040] In one embodiment, the first feed line has a first feeding section and a first coupling section extending integrally to the first feeding section in a direction deviating from the first feeding section, wherein the second feed line has a second feeding section and a second coupling section extending integrally to the second feeding section in a direction deviating from the second feeding section, wherein the first feeding section and the second feeding section are parallel columnar straight conductive wires and extend from the first feeding end and the second feeding end respectively.

[0041] In one embodiment, the first feeding section is electrically coupled to the oscillation circuit unit and fixedly coupled to the circuit substrate via the first coupling section, and the second feeding section is electrically coupled to the ground potential of the oscillation circuit unit and fixedly coupled to the circuit substrate via the second coupling section.

[0042] In one embodiment, the first coupling segment and the second coupling segment are respectively integrally extended to the first feeding segment and the second feeding segment in directions away from each other, so as to form a state in which the distance between the first coupling segment and the second coupling segment in a direction perpendicular to the first feeding segment and the second feeding segment is greater than the distance between the first feeding segment and the second feeding segment.

[0043] In one embodiment, a distance between the first coupling section and the second coupling section in a direction perpendicular to the first feeding section and the second feeding section is less than or equal to λ / 8.

[0044] In one embodiment, the first coupling section extends from an end of the first feeding section opposite to the first feeding end in a direction perpendicular to the first feeding section and in a direction parallel to the first feeding section, and the second coupling section extends from an end of the second feeding section opposite to the second feeding end in a direction perpendicular to the second feeding section and in a direction parallel to the second feeding section.

[0045] In one embodiment, the first coupling section extends from an end of the first feeding section opposite to the first feeding end in a direction perpendicular to the first feeding section and in a direction parallel to the first feeding section, and the second coupling section extends from an end of the second feeding section opposite to the second feeding end in a direction perpendicular to the second feeding section and in a direction parallel to the second feeding section.

[0046] In one embodiment, the first coupling section is a cylindrical arc-shaped conductive line extending from an end of the first feeding section opposite to the first feeding end in both a direction perpendicular to the first feeding section and a direction parallel to the first feeding section, and the second coupling section is a cylindrical arc-shaped conductive line extending from an end of the second feeding section opposite to the second feeding end in both a direction perpendicular to the second feeding section and a direction parallel to the second feeding section.

[0047] In one embodiment, the high-gain microwave Doppler detection module further includes a fixing base, wherein the fixing base is attached to a side of the circuit substrate bearing the electromagnetic reflecting surface, wherein the first feed line and the second feed line are partially clamped and fixed to the fixing base.

[0048] In one embodiment, the first radiation source and the second radiation source are arranged symmetrically about a midpoint of a line connecting the first feeding end and the second feeding end.

[0049] In one embodiment, the first radiation source is configured as a columnar conductive line extending from the first feeding end in the direction of the second feeding end toward the first feeding end and in a direction close to the electromagnetic reflection surface, and the second radiation source is configured as a columnar conductive line extending from the second feeding end in the direction of the first feeding end toward the second feeding end and in a direction close to the electromagnetic reflection surface.

[0050] In one embodiment, the first radiation source and the second radiation source are bent once, and the corresponding bent first radiation source is a columnar conductive line extending from the first feeding end in the direction of the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, and the corresponding bent second radiation source is a columnar conductive line extending from the second feeding end in the direction of the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface, then the size of the first radiation source in the direction perpendicular to the electromagnetic reflection surface corresponds to the distance L11 between the end of the first radiation source opposite to the first feeding end and the bent part of the first radiation source, wherein L11 satisfies λ / 32≤L11≤λ / 4, and the size of the second radiation source in the direction perpendicular to the electromagnetic reflection surface corresponds to the distance L21 between the end of the second radiation source opposite to the second feeding end and the bent part of the second radiation source, wherein L21 satisfies λ / 32≤L21≤λ / 4.

[0051] In one embodiment, the distance between the midpoint of the line connecting the first feeding end and the second feeding end and the electromagnetic reflection surface is λ / 4.

[0052] In one embodiment, the distance between the first feeding end and the second feeding end is λ / 128.

[0053] In one embodiment, a line length parameter of the second radiation source defined between the second feeding end and an end opposite to the second feeding end is L2, and a line length parameter of the first radiation source defined between the first feeding end and an end opposite to the first feeding end is L1, wherein the second radiation source and the first radiation source are configured to satisfy that a line length tends to λ / 4 from the second feeding end and the first feeding end respectively within an error range of λ / 128, that is, L1 and L2 respectively satisfy 31λ / 128≤L1≤33λ / 128, 31λ / 128≤L2≤33λ / 128.

[0054] In one embodiment, the first radiation source is configured as a columnar arc-shaped conductive line extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, wherein the second radiation source is configured as a columnar arc-shaped conductive line extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface, wherein the dimension of the first radiation source in a direction perpendicular to the electromagnetic reflection surface corresponds to the distance between an end of the first radiation source opposite to the first feeding end and the first feeding end in a direction perpendicular to the electromagnetic reflection surface, and the dimension of the second radiation source in a direction perpendicular to the electromagnetic reflection surface corresponds to the distance between an end of the second radiation source opposite to the second feeding end and the second feeding end in a direction perpendicular to the electromagnetic reflection surface.

[0055] In one embodiment, the first radiation source is configured as a columnar straight conductive wire extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, and the second radiation source is configured as a columnar straight conductive wire extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface.

[0056] In one embodiment, the first radiation source is configured as a columnar arc-shaped conductive line extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, and the second radiation source is configured as a columnar arc-shaped conductive line extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface.

[0057] In one embodiment, the first radiation source and the second radiation source are cylindrical arc-shaped conductive wires that are bent in a direction toward the electromagnetic reflection surface.

[0058] In one embodiment, the first radiation source and the second radiation source are cylindrical arc-shaped conductive wires that are bent in a direction away from the electromagnetic reflection surface.

[0059] Other purposes and advantages of the present invention will be further reflected by the specific implementation manner and the contents of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1A The schematic diagram of the structure of a microwave detection module with an existing columnar radiation source structure.

[0061] Figure 1B The schematic diagram of the structure of a microwave detection module with an existing flat-plate radiation source structure is shown in FIG.

[0062] Figure 2 This is a schematic diagram of the installation structure of a microwave detection module with an existing columnar radiation source structure on an LED light board.

[0063] Figure 3 FIG. 4 is a schematic diagram of a three-dimensional structure of a microwave Doppler detection module according to an embodiment of the present invention.

[0064] Figure 4 FIG. 4 is a radiation pattern of the microwave Doppler detection module according to the above embodiment of the present invention.

[0065] Figure 5 It is a schematic diagram of the three-dimensional structure of the microwave Doppler detection module according to a variant embodiment of the above embodiment of the present invention.

[0066] Figure 6 Schematic diagram of the radiation direction of the microwave Doppler detection module according to the above variant embodiment of the present invention.

[0067] Figure 7 It is a schematic diagram of the three-dimensional structure of the microwave Doppler detection module according to another variant embodiment of the above embodiment of the present invention.

[0068] Figure 8 It is a schematic side cross-sectional structure diagram of the microwave Doppler detection module according to the above-mentioned variant embodiment of the present invention.

[0069] Fig. 9 FIG. 4 is a return loss curve diagram of the microwave Doppler detection module according to the above modified embodiment of the present invention. DETAILED DESCRIPTION

[0070] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0071] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0072] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0073] Referring to the accompanying drawings of the present invention Figure 3As shown, a three-dimensional structure of a high-gain microwave Doppler detection module 10 according to an embodiment of the present invention is schematically shown, wherein the high-gain microwave Doppler detection module 10 includes at least one pair of dual coupled poles 11, wherein the pair of dual coupled poles 11 includes a first radiation source pole 111 and a second radiation source pole 112, wherein the second radiation source pole 112 has a second feeding end 1121, and the first radiation source pole 111 has a first feeding end 1111, wherein the second feeding end 1121 and the first feeding end 1111 are close to each other, wherein the second radiation source pole 112 is a conductor extending from the second feeding end 1121 as an end, and the first radiation source pole 111 is a first feeding end 1111. The invention relates to a conductor extending from one end to another end, wherein the first radiation source 111 and the second radiation source 112 are configured to be co-source fed at the first feeding end 1111 and the second feeding end 1121, respectively, so that when the first radiation source 111 and the second radiation source 112 are co-source fed at the first feeding end 1111 and the second feeding end 1121, respectively, the first radiation source 111 is coupled from the first feeding end 1111 along the first radiation source 111 to a corresponding position of the second radiation source 112 from the second feeding end 1121 along the second radiation source 112, thereby forming a dual coupling mode between the first radiation source 111 and the second radiation source 112.

[0074] It is worth mentioning that, based on the dual coupling mode between the first radiation source 111 and the second radiation source 112, the second radiation source 112 with the second feeding end 1121 as the end is fed at the second feeding end 1121, and the first radiation source 111 with the first feeding end 1111 as the end is fed at the first feeding end 1111, then the size requirement for coupling between the second radiation source 112 and the first radiation source 111 is reduced. Specifically, the second radiation source 112 and the first radiation source 111 are configured to satisfy the line length greater than or equal to λ / 16 from the second feeding end 1121 and the first feeding end 1111, respectively, where λ is a wavelength parameter corresponding to the frequency of the feeding signal. That is, the first radiation source 111 is configured to satisfy that the line length between the first feeding end 1111 and the end opposite to the first feeding end 1111 is greater than or equal to λ / 16, and the second radiation source 112 is configured to satisfy that the line length between the second feeding end 1121 and the end opposite to the second feeding end 1121 is greater than or equal to λ / 16, that is, the first radiation source 111 and the second radiation source 112 are allowed to be configured to have a minimum line length of λ / 16 from the first feeding end 1111 and the second feeding end 1121, respectively.

[0075] Further, the second feeding end 1121 and the first feeding end 1111 are close to each other and the distance between the second feeding end 1121 and the first feeding end 1111 should be less than or equal to λ / 32, so that when the first radiation source 111 and the second radiation source 112 are co-source fed at the first feeding end 1111 and the second feeding end 1121 respectively, the first radiation source 111 and the second radiation source 112 can be coupled to each other.

[0076] Preferably, the distance between the second feeding end 1121 and the first feeding end 1111 approaches λ / 128, so that when the first radiation source 111 and the second radiation source 112 are co-source fed at the first feeding end 1111 and the second feeding end 1121 respectively, the mutual coupling loss between the first radiation source 111 and the second radiation source 112 can be reduced and the gain of the high-gain microwave Doppler detection module 10 can be correspondingly improved.

[0077] In particular, in the description of the embodiments of the present invention, the high-gain microwave Doppler detection module 10 is exemplified by taking the example that the first radiation source pole 111 and the second radiation source pole 112 are respectively fed and connected to different poles of the same excitation signal feed source at the first feeding end 1111 and the second feeding end 1121 and are fed from the same source.

[0078] Specifically, in this embodiment of the present invention, the first radiation source 111 is suitable for being fed and connected to the feed of the excitation signal feed source at the first feeding end 1111, and the second radiation source 112 is suitable for being electrically connected to the ground of the excitation signal feed source at the second feeding end 1121 and being co-source fed with the first radiation source 111 by the excitation signal feed source, wherein when the first radiation source 111 is fed at the first feeding end 1111 and the second radiation source 112 is grounded at the second feeding end 1121, the first radiation source 111 is coupled from the first feeding end 1111 along the first radiation source 111 to the corresponding position of the second radiation source 112 from the second feeding end 1121 to form a radiation space 100, wherein The radiation space 100 is the coverage range of the electromagnetic waves radiated by the high-gain microwave Doppler detection module 10, wherein the first radiation source 111 is coupled from the first feeding end 1111 along the first radiation source 111 to the corresponding position of the second radiation source 112 from the second feeding end 1121 along the second radiation source 112, that is, the radiation space 100 is formed based on a dual coupling mode and can avoid being concave toward the high-gain microwave Doppler detection module 10 in a direction perpendicular to the connection direction of the first feeding end 1111 and the second feeding end 1121, thereby avoiding the formation of a detection dead zone in a direction perpendicular to the connection direction of the first feeding end 1111 and the second feeding end 1121, which is beneficial to improving the detection stability and applicability of the high-gain microwave Doppler detection module 10.

[0079] Furthermore, the high-gain microwave Doppler detection module 10 has an electromagnetic reflection surface 12, wherein the first radiation source pole 111 and the second radiation source pole 112 are arranged at intervals from the electromagnetic reflection surface 12 in the space corresponding to the electromagnetic reflection surface 12, so as to form the directional radiation characteristics of the high-gain microwave Doppler detection module 10 by virtue of the reflection characteristics of the electromagnetic reflection surface 12 to electromagnetic waves. Then, the high-gain microwave Doppler detection module 10 is suitable for detecting the activities of objects in a directional space, and is beneficial to avoiding self-excitation of the high-gain microwave Doppler detection module 10 and improving the anti-interference performance of the high-gain microwave Doppler detection module 10.

[0080] In particular, the electromagnetic reflection surface 12 is configured to satisfy that the distance between the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121 is greater than or equal to λ / 32 and less than or equal to λ / 2, and preferably tends to λ / 4, so that the reflection effect of the electromagnetic reflection surface 12 on the radiation from the first radiation source pole 111 and the second radiation source pole 112 toward the electromagnetic reflection surface 12 can be enhanced, which is beneficial to improve the detection distance of the high gain microwave Doppler detection module 10.

[0081] Further, based on the structural relationship that the first feeding end 1111 and the second feeding end 1121 are close to each other, the first radiation source 111 extends from the first feeding end 1111 with the first feeding end 1111 as the end, and the second radiation source 112 extends from the second feeding end 1121 with the second feeding end 1121 as the end, the first radiation source 111 and the second radiation source 112 can be coupled in a dual coupling manner, and the corresponding second radiation source 112 has a line length corresponding to the first radiation source 111, then the second radiation source 112 is free from the restriction of having a minimum restricted area as a reference ground, that is, the line length of the second radiation source 112 corresponding to the first radiation source 111 has a variety of implementation structures and is not limited to a plate-like structure with a minimum restricted area, and the high-gain microwave Doppler detection module 10 has a variety of structures, which is conducive to improving the applicability of the high-gain microwave Doppler detection module 10.

[0082] Specifically, in this embodiment of the present invention, the line length of the second radiation source 112 corresponding to the first radiation source 111 is set to a columnar conductive line, including but not limited to a circular columnar conductive line and a square columnar conductive line, wherein the line length parameter L2 of the second radiation source 112 defined between the second feeding end 1121 and the end opposite to the second feeding end 1121 satisfies: λ / 16≤L2≤λ. Correspondingly, the line length parameter L1 of the first radiation source 111 defined between the first feeding end 1111 and the end opposite to the first feeding end 1111 satisfies: λ / 16≤L1≤λ. In this way, when the second radiation source 112 with the second feeding end 1121 as an end is grounded at the second feeding end 1121, and the first radiation source 111 with the first feeding end 1111 as an end is fed at the first feeding end 1111, the first radiation source 111 and the second radiation source 112 can be coupled in a dual coupling manner.

[0083] Preferably, the second radiation source 112 and the first radiation source 111 are configured to satisfy that the second feeding end 1121 and the first feeding end 1111 have a line length approaching λ / 4 within an error range of λ / 128, that is, 31λ / 128≤L1≤33λ / 128, 31λ / 128≤L2≤33λ / 128. In this way, the first radiation source 111 and the second radiation source 112 have a line length approaching λ / 2, which is beneficial to improving the radiation efficiency between the first radiation source 111 and the second radiation source 112, and correspondingly beneficial to improving the gain of the high-gain microwave Doppler detection module 10.

[0084] Further, in this embodiment of the present invention, the first radiation source 111 and the second radiation source 112 are point-symmetrically arranged with respect to the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121, that is, the first radiation source 111 and the second radiation source 112 have the same shape and size, and the positional relationship between the first radiation source 111 and the second radiation source 112 satisfies that the first radiation source 111 can be rotated 180 degrees in at least one direction around the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121 to coincide with the position of the second radiation source 112. This is conducive to ensuring that the second radiation source 112 and the first radiation source 111 are coupled in a dual manner, and is conducive to maintaining the symmetry of the radiation space 100, and correspondingly maintaining the stability of the detection range of the high-gain microwave Doppler detection module 100.

[0085] Specifically, in this embodiment of the present invention, the first radiation source 111 and the second radiation source 112, which are configured as columnar conductive wires, are coaxially arranged, that is, the first radiation source 111 extends from the first feeding end 1111 to the first feeding end 1111 in the direction of the second feeding end 1121, with the first feeding end 1111 as the end, along the line connecting the first feeding end 1111 and the second feeding end 1121; the second radiation source 112 extends from the second feeding end 1121 to the second feeding end 1121 in the direction of the first feeding end 1111 to the second feeding end 1121, with the second feeding end 1121 as the end, along the line connecting the first feeding end 1111 and the second feeding end 1121. In this way, a point-symmetric structural relationship is formed between the first radiation source 111 and the second radiation source 112 about the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121.

[0086] Furthermore, the high-gain microwave Doppler detection module 10 also includes a circuit substrate 13 and a circuit unit 14 carried by the circuit substrate 13, wherein the circuit unit 14 includes an oscillating circuit unit 141 and a mixing detection unit 142, wherein the first radiation source pole 111 and the second radiation source pole 112 are electrically coupled to different poles of the oscillating circuit unit 141 at the first feeding end 1111 and the second feeding end 1121, respectively. Specifically, the first radiation source pole 111 is fed and connected to the feed pole of the oscillating circuit unit 141 at the first feeding end 1111, and the second radiation source pole 112 is electrically connected to the ground pole of the oscillating circuit unit 141 at the second feeding end 1121, wherein the mixing detection unit 142 is electrically coupled to the oscillating circuit unit 141 and the dual coupling pole 11, wherein the oscillating circuit The unit 141 allows being powered and outputs a feeding signal at its feeding pole and is grounded at its grounding pole, that is, the oscillation circuit unit 141 allows being powered and serves as an excitation signal feeding source, so that when the oscillation circuit unit 141 is powered, the first radiation source pole 111 and the second radiation source pole 112 are co-source fed by the oscillation circuit unit 141 at the first feeding end 1111 and the second feeding end 1121 respectively to emit a detection beam, and receive an echo of the detection beam, wherein the echo is received and a corresponding echo signal is generated, and the mixing detection unit 142 outputs an intermediate frequency signal corresponding to the frequency difference between the feeding signal and the echo signal, then based on the Doppler effect principle, the intermediate frequency signal corresponds to the movement of the corresponding object that reflects the detection beam to form the echo, and thus the high gain microwave Doppler detection module 10 is suitable for detecting the movement of objects.

[0087] It is worth mentioning that the first radiation source 111 and the second radiation source 112 are respectively terminated with the first feeding end 1111 and the second feeding end 1121. When the first radiation source 111 and the second radiation source 112 are respectively fed by the oscillation circuit unit 141 at the first feeding end 1111 and the second feeding end 1121, the potential and current of the first radiation source 111 and the second radiation source 112 are in a dual distribution state. The coupling between the second radiation source pole 112 and the first radiation source pole 111 is simplified, that is, the coupling between the second radiation source pole 112 and the first radiation source pole 111 is simplified, and the corresponding data processing of the high gain microwave Doppler detection module 10 can be simplified. For example, the correlation between the intermediate frequency signal output by the mixing detection unit 142 and the corresponding object movement is improved, so that the corresponding data processing of the high gain microwave Doppler detection module 10 can be simplified, which is beneficial to reduce the cost of the high gain microwave Doppler detection module 10 and improve the stability and accuracy of the high gain microwave Doppler detection module 10.

[0088] In particular, in this embodiment of the present invention, the electromagnetic reflection surface 12 blocks the circuit unit 14 and the first radiation source pole 111 and the second radiation source pole 112, so that among the electromagnetic radiation generated by the mutual coupling of the first radiation source pole 111 and the second radiation source pole 112, the electromagnetic radiation from the first radiation source pole 111 and the second radiation source pole 112 toward the circuit unit 14 can be reflected by the electromagnetic reflection surface 12 to avoid interfering with the circuit unit 14, thereby helping to improve the anti-interference performance of the high-gain microwave Doppler detection module 10.

[0089] Specifically, in this embodiment of the present invention, the electromagnetic reflection surface 12 is carried on a side of the circuit substrate 13 opposite to a side on which the circuit unit 14 is carried, that is, a corresponding conductive layer (such as a copper layer) on a side of the circuit substrate 13 opposite to a side on which the circuit unit 14 is carried forms the electromagnetic reflection surface 12, wherein the first radiation source 111 and the second radiation source 112 are arranged at intervals from the electromagnetic reflection surface 12 in a space corresponding to the electromagnetic reflection surface 12, so as to form the high-gain microwave Doppler detection module by virtue of the reflection characteristics of the electromagnetic reflection surface 12 to electromagnetic waves and the structural relationship between the first radiation source 111 and the second radiation source 112 and the electromagnetic reflection surface 12 in a space corresponding to the electromagnetic reflection surface 12. 10 has a directional radiation characteristic from the electromagnetic reflection surface 12 to the first radiation source pole 111 and the second radiation source pole 112, that is, the corresponding detection direction of the high-gain microwave Doppler detection module 10 from the electromagnetic reflection surface 12 to the first radiation source pole 111 and the second radiation source pole 112, then the high-gain microwave Doppler detection module 10 is suitable for detecting the activities of objects in the directional space corresponding to the detection direction, and is beneficial to avoiding the self-excitation of the high-gain microwave Doppler detection module 10, and avoiding the electromagnetic radiation generated by the coupling between the first radiation source pole 111 and the second radiation source pole 112 from interfering with the circuit unit 14 carried on the circuit substrate 13, thereby improving the anti-interference performance of the high-gain microwave Doppler detection module.

[0090] That is to say, based on the dual coupling mode between the first radiation source 111 and the second radiation source 112, the high-gain microwave Doppler detection module 10 has a radiation direction corresponding to the radial direction of the line connecting the first feeding end 1111 and the second feeding end 1121, so that when the electromagnetic reflection surface 12 is set in this radiation direction, the radiation from the first radiation source 111 and the second radiation source 112 to the electromagnetic reflection surface 12 can be reflected to form the detection direction of the high-gain microwave Doppler detection module 10 from the electromagnetic reflection surface 12 to the first radiation source 111 and the second radiation source 112, and strengthen the electromagnetic radiation in this detection direction, which is beneficial to improve the detection distance of the high-gain microwave Doppler detection module 10.

[0091] In particular, the electromagnetic reflection surface 12 is preferably configured to have a size greater than or equal to λ / 4 in a direction parallel to a line connecting the first feeding end 1111 and the second feeding end 1121, and a size greater than or equal to λ / 4 in a direction perpendicular to the line, so that the reflection effect of the electromagnetic reflection surface 12 on radiation from the first radiation source 111 and the second radiation source 112 toward the electromagnetic reflection surface 12 can be enhanced.

[0092] Furthermore, the high-gain microwave Doppler detection module 10 also includes a first feed line 15 and a second feed line 16, wherein the first radiation source 111 is electrically coupled to the feed of the oscillation circuit unit 141 at the first feed end 1111 via the first feed line 15, and the second radiation source 112 is electrically connected to the ground of the oscillation circuit unit 141 at the second feed end 1121 via the second feed line 16, so that a circuit connection structure between the first radiation source 111 and the second radiation source 112 and the circuit unit 14 is formed by the first feed line 15 and the second feed line 16, and the first radiation source 111 and the second radiation source 112 are supported by the first feed line 15 and the second feed line 16 to form a structural relationship in which the first radiation source 111 and the second radiation source 112 are arranged at intervals from the electromagnetic reflection surface 12 in the space corresponding to the same surface of the electromagnetic reflection surface 12.

[0093] Specifically, in this embodiment of the present invention, the first radiation source pole 111 extends integrally from the first feeding end 1111 to the first feeding line 15, and the second radiation source pole 112 extends integrally from the second feeding end 1121 to the second feeding line 16, thereby simplifying the structure of the high-gain microwave Doppler detection module 10 and facilitating the impedance consistency of the high-gain microwave Doppler detection module 10 and facilitating the impedance matching of the high-gain microwave Doppler detection module 10.

[0094] Further, the first feed line 15 and the second feed line 16 are parallel to each other, and the distance between the first feed line 15 and the second feed line 16 corresponds to the distance between the first feeding end 1111 and the second feeding end 1121, which satisfies a range of less than or equal to λ / 32, and preferably tends to λ / 128, so that when the first radiation source pole 111 and the second radiation source pole 112 are fed through the first feed line 15 and the second feed line 16 respectively, the coupling effect between the first feed line 15 and the second feed line 16 can be reduced, which is beneficial to reducing the loss of the first feed line 15 and the second feed line 16, that is, the return loss S11 of the first feed line 15 and the second feed line 16 is reduced, which is beneficial to improve the gain of the high-gain microwave Doppler detection module 10.

[0095] Further reference is made to the accompanying drawings of the present invention. Figure 4 As shown, the radiation pattern of the high-gain microwave Doppler detection module 10 corresponding to the radiation space 100 according to the above embodiment of the present invention is illustrated. It can be seen from the figure that in the directional radiation direction of the high-gain microwave Doppler detection module 10, that is, the direction perpendicular to the plane where the X-axis and the Y-axis in the figure are located, the high-gain microwave Doppler detection module 10 has a radiation gain greater than 7dB, and the radiation space 100 is convex in this direction. Correspondingly, the cross-section of the radiation space 100 perpendicular to this direction tends to be a complete elliptical shape, which is different from the microwave detection module of the traditional columnar radiation source structure in which the cross-section perpendicular to its directional radiation direction is a circular ring shape with a detection dead zone in the middle. The radiation space 100 of the high-gain microwave Doppler detection module 10 is convex in the directional radiation direction and can avoid the formation of a detection dead zone.

[0096] It is worth mentioning that based on the adjustment of the shapes of the second radiation source 112 and the first radiation source 111, such as adjusting the shapes of the second radiation source 112 and the first radiation source 111 in a bending manner, while maintaining the line length parameter L2 of the second radiation source 112 to satisfy λ / 16≤L2≤λ, and the line length parameter L1 of the first radiation source 111 to satisfy λ / 16≤L1≤λ, the size of the microwave Doppler detection module 10 can be further reduced, that is, while ensuring the coupling between the second radiation source 112 and the first radiation source 111 in a dual manner, it is beneficial to improve the applicability of the microwave Doppler detection module 10 by reducing the size of the microwave Doppler detection module 10. In particular, based on the adjustment of the shapes of the first radiation source pole 111 and the second radiation source pole 112, or the adjustment of the positional relationship between the first radiation source pole 111 and the second radiation source pole 112, the radiation space 100 can be adjusted to correspondingly change the coverage range of the electromagnetic waves radiated by the high gain microwave Doppler detection module 10, thereby improving the applicability of the high gain microwave Doppler detection module 10.

[0097] For example, referring to the accompanying drawings of the present invention, Figure 5 As shown, based on the adjustment of the shapes of the first radiation source 111 and the second radiation source 112, the high gain microwave Doppler detection module 10 according to a variant embodiment of the above embodiment of the present invention is illustrated, wherein in this variant embodiment of the present invention, the first radiation source 111 extends from the first feeding end 1111 at the second feeding end 1121 to the first feeding end 1111 and in a direction close to the electromagnetic reflection surface 12, and the second radiation source 112 extends from the second feeding end 1121 at the first feeding end 1111 to the second feeding end 1121 and in a direction close to the electromagnetic reflection surface 12, that is, the adjustment of the shapes of the first radiation source 111 and the second radiation source 112 forms a state in which the end of the first radiation source 111 opposite to the first feeding end 1111 is close to the electromagnetic reflection surface 12 relative to the first feeding end 1111, and forms a state in which the end of the second radiation source 112 opposite to the second feeding end 1121 is close to the electromagnetic reflection surface 12 relative to the second feeding end 1121.

[0098] In particular, the first radiation source 111 extends from the first feeding end 1111 in the direction of the second feeding end 1121 toward the first feeding end 1111 and in a direction close to the electromagnetic reflection surface 12, and the second radiation source 112 extends from the second feeding end 1121 in the direction of the first feeding end 1111 toward the second feeding end 1121 and in a direction close to the electromagnetic reflection surface 12. The corresponding sizes of the first radiation source 111 and the second radiation source 112 in a direction perpendicular to the electromagnetic reflection surface 12 are both in a range greater than or equal to λ / 32 and less than or equal to λ / 4. In this way, while ensuring that the first radiation source 111 and the second radiation source 112 can form a dual coupling mode, based on the size setting of the corresponding first radiation source 111 and the second radiation source 112 in a direction perpendicular to the electromagnetic reflection surface 12, the size of the high-gain microwave Doppler detection module 10 can be reduced, and the radiation space 100 of the high-gain microwave Doppler detection module 10 can be adjusted.

[0099] Specifically, in this variant embodiment of the present invention, the first radiation source 111 and the second radiation source 112 are bent once, and the corresponding bent first radiation source 111 extends from the first feeding end 1111 in the direction of the second feeding end 1121 to the first feeding end 1111 and in the direction close to the electromagnetic reflection surface 12, and the second radiation source 112 extends from the second feeding end 1121 in the direction of the first feeding end 1111 to the second feeding end 1121 and in the direction close to the electromagnetic reflection surface 12. In this way, the state of the end of the first radiation source 111 opposite to the first feeding end 1111 is close to the electromagnetic reflection surface 12 relative to the first feeding end 1111, and the state of the end of the second radiation source 112 opposite to the second feeding end 1121 is close to the electromagnetic reflection surface 12 relative to the second feeding end 1121 is formed.

[0100] Therefore, in this embodiment of the present invention, the dimension of the first radiation source 111 in the direction perpendicular to the electromagnetic reflection surface 12 corresponds to the distance L11 between the end of the first radiation source 111 opposite to the first feeding end 1111 and the bent part of the first radiation source 111, and the L11 satisfies λ / 32≤L11≤λ / 4, and the dimension of the second radiation source 112 in the direction perpendicular to the electromagnetic reflection surface 12 corresponds to the distance L21 between the end of the second radiation source 112 opposite to the second feeding end 1121 and the bent part of the second radiation source 112, and the L21 satisfies λ / 32≤L21≤λ / 4, wherein based on the corresponding size settings of the L11 and the L21, the radiation space 100 of the high-gain microwave Doppler detection module 10 can be adjusted, and the gain of the corresponding high-gain microwave Doppler detection module 10 can be adjusted.

[0101] Further reference is made to the accompanying drawings of the present invention. Figure 6 As shown, the radiation pattern of the high-gain microwave Doppler detection module 10 corresponding to the radiation space 100 according to the above-mentioned variant embodiment of the present invention is schematically shown. It can be seen from the figure that in the directional radiation direction of the high-gain microwave Doppler detection module 10, that is, the direction perpendicular to the plane where the X-axis and the Y-axis in the figure are located, the high-gain microwave Doppler detection module 10 also has a radiation gain greater than 7dB. In particular, different from the radiation space 100 of the high-gain microwave Doppler detection module 10 in the previous embodiment, in this variant embodiment of the present invention, based on the adjustment of the shapes of the first radiation source pole 111 and the second radiation source pole 112, the end of the first radiation source pole 111 opposite to the first feeding end 1111 is close to the electromagnetic reflection surface 12 relative to the first feeding end 1111, and the end of the second radiation source pole 112 opposite to the second feeding end 1121 is close to the electromagnetic reflection surface 1 2, the radiation space 100 is adjusted to have a nearly complete circle in the cross section perpendicular to the directional radiation direction, which is conducive to improving the applicability of the high-gain microwave Doppler detection module 10 in detecting the activities of objects in the directional space in different application places, and is different from the microwave detection modules of the traditional columnar radiation source structure and the microwave detection modules of the flat radiation source structure, which have a ring shape with a detection dead zone in the middle in the cross section perpendicular to the directional radiation direction. The radiation space 100 of the high-gain microwave Doppler detection module 10 is convex in the directional radiation direction to avoid the formation of a detection dead zone.

[0102] It is worth mentioning that based on the structural relationship in the above-mentioned variant embodiment, the first radiation source 111 extends from the first feeding end 1111 at the second feeding end 1121 toward the first feeding end 1111 and in a direction close to the electromagnetic reflection surface 12, and the second radiation source 112 extends from the second feeding end 1121 at the first feeding end 1111 toward the second feeding end 1121 and in a direction close to the electromagnetic reflection surface 12. In some variant embodiments of the present invention, the first radiation source 111 extends from the first feeding end 1111 to the first feeding end 1111 and at the second feeding end 1121 in a direction toward the first feeding end 1111 and in a direction close to the electromagnetic reflection surface 12, and the second radiation source 112 extends from the second feeding end 1121 to the second feeding end 1121 and at the first feeding end 1111 in a direction toward the second feeding end 1121 and in a direction close to the electromagnetic reflection surface 12, so that while maintaining the line length parameter L2 of the second radiation source 112 satisfying λ / 16≤L2≤λ and the line length parameter L1 of the first radiation source 111 satisfying λ / 16≤L1≤λ, the second radiation source 112 is The dimensions of the radiation source electrode 112 and the first radiation source electrode 111 in a direction parallel to the line connecting the first feeding end 1111 and the second feeding end 1121 are reduced, and a state is formed in which the end of the first radiation source electrode 111 opposite to the first feeding end 1111 is close to the electromagnetic reflection surface 12 relative to the first feeding end 1111, and a state is formed in which the end of the second radiation source electrode 112 opposite to the second feeding end 1121 is close to the electromagnetic reflection surface 12 relative to the second feeding end 1121, thereby facilitating the adjustment of the radiation space 100 to have a nearly complete circle in a cross section perpendicular to the directional radiation direction, thereby improving the applicability of the high-gain microwave Doppler detection module 10 for detecting the activities of objects in the directional space in different application places.

[0103] For example, in some embodiments of the present invention, corresponding to the coaxial positional relationship between the first radiation source 111 and the second radiation source 112 in the above embodiments, the first radiation source 111 and the second radiation source 112 are rotated and adjusted around the first feeding end 1111 and the second feeding end 1121 respectively in the direction close to the electromagnetic reflection surface 12. That is, the first radiation source 111 is configured as a columnar straight conductive wire extending from the first feeding end 1111 to the first feeding end 1111 as an end, and in the direction of the second feeding end 1121 to the first feeding end 1111 and in the direction close to the electromagnetic reflection surface 12, wherein the second radiation source 112 is configured as a columnar straight conductive wire extending from the second feeding end 1121 to the second feeding end 1121 as an end, and in the direction of the first feeding end 1111 to the second feeding end 1121 and in the direction close to the electromagnetic reflection surface 12.

[0104] By way of example, in some other embodiments of the present invention, the first radiation source 111 and the second radiation source 112 are arranged in a curved manner. Specifically, the first radiation source 111 is a columnar arc-shaped conductive line extending from the first feeding end 1111 to the first feeding end 1111 as an end, and extending in a direction from the second feeding end 1121 to the first feeding end 1111 and in a direction close to the electromagnetic reflection surface 12. The second radiation source 112 is a columnar arc-shaped conductive line extending from the second feeding end 1121 to the second feeding end 1121 as an end, and extending in a direction from the first feeding end 1111 to the second feeding end 1121 and in a direction close to the electromagnetic reflection surface 12.

[0105] That is, the arc shape of the first radiation source 111 is the result of nonlinear extension in the direction of the line from the second feeding end 1121 to the first feeding end 1111 and the direction close to the electromagnetic reflection surface 12. Similarly, the arc shape of the second radiation source 112 is the result of nonlinear extension in the direction of the line from the first feeding end 1111 to the second feeding end 1121 and the direction close to the electromagnetic reflection surface 12. For example, the first radiation source 111 and the second radiation source 112 are cylindrical arc-shaped conductive lines formed by bending in the direction biased toward the electromagnetic reflection surface 12; for another example, the first radiation source 111 and the second radiation source 112 are cylindrical arc-shaped conductive lines formed by bending in the direction deviating from the electromagnetic reflection surface 12.

[0106] Further reference is made to the accompanying drawings of the present invention. Figure 7 and Figure 8As shown, the high-gain microwave Doppler detection module 10 according to another variant embodiment of the above embodiment of the present invention is illustrated. In particular, in this variant embodiment of the present invention, the first feed line 15 has a first feed section 151, wherein the second feed line 16 has a second feed section 165, wherein the first feed section 151 and the second feed section 165 are mutually parallel cylindrical straight electric wires and extend from the first feed end 1111 and the second feed end 1121 respectively, then the distance between the first feed section 151 and the second feed section 165 corresponds to the distance between the first feed end 1111 and the second feed end 1121, which satisfies the range of less than or equal to λ / 32, and preferably tends to λ / 128, so that the coupling effect between the first feed section 151 and the second feed section 165 can be reduced, which is beneficial to reducing the loss of the first feed line 15 and the second feed line 16, that is, reducing the return loss S11 of the first feed line and the second feed line, which is beneficial to further improve the gain of the high-gain microwave Doppler detection module 10.

[0107] In particular, in this variant embodiment of the present invention, the first feed line 15 further has a first coupling section 152 integrally extending to the first feed section 151, wherein the second feed line 16 further has a second coupling section 166 integrally extending to the second feed section 165, that is, the first feed section 151 is electrically coupled to the oscillation circuit unit 141 and fixedly coupled to the circuit substrate 13 via the first coupling section 152, and the second feed section 165 is electrically coupled to the ground potential of the oscillation circuit unit 141 and fixedly coupled to the circuit substrate 13 via the second coupling section 166, wherein the first coupling section 152 integrally extends to the first feed section 151 in a direction deviating from the first feed section 151, and the second coupling section 166 integrally extends to the second feed section 165 in a direction deviating from the second feed section 165, so that the first feed line 15 and the second feed line 16 are arranged by designing the length and shape of the first coupling section 152 and the second coupling section 166. The length of the two feeding lines 15 is conducive to satisfying the impedance matching and corresponding resonant frequency design of the high-gain microwave Doppler detection module 10 based on the corresponding length setting of the first feeding line 15 and the second feeding line 16, while being able to maintain the distance from the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121 to the electromagnetic reflection surface 12 in an appropriate range, such as a range greater than or equal to λ / 32 and less than or equal to λ / 2 or a preferred range tending to λ / 4 based on the shape design of the first coupling section 152 and the second coupling section 166, that is, based on the length and shape design of the first coupling section 152 and the second coupling section 166, the high-gain microwave Doppler detection module 10 can satisfy the corresponding impedance matching and resonant frequency design, and the reflection effect of the electromagnetic reflection surface 12 on the radiation from the first radiation source pole 111 and the second radiation source pole 112 to the electromagnetic reflection surface 12 can be enhanced, which is conducive to improving the detection distance of the high-gain microwave Doppler detection module 10.

[0108] In other words, based on the length and shape design of the first coupling section 152 and the second coupling section 166, the distance from the midpoint of the line connecting the first feeding end 1111 and the second feeding end 1121 to the electromagnetic reflection surface 12 can be maintained or reduced in a range greater than or equal to λ / 32 and less than or equal to λ / 2, and at the same time, the high-gain microwave Doppler detection module 10 can meet the corresponding impedance matching and resonant frequency design. Then, the high-gain microwave Doppler detection module 10 can have a higher gain while meeting the corresponding impedance matching and resonant frequency design.

[0109] Further, in this variant embodiment of the present invention, the first coupling section 152 and the second coupling section 166 are integrally extended to the first feeding section 151 and the second feeding section 165 in directions away from each other, so that the distance between the first coupling section 152 and the second coupling section 166 in a direction perpendicular to the first feeding section 151 and the second feeding section 165 is greater than the distance between the first feeding section 151 and the second feeding section 165. In this way, the state in which the first feeding section 151 and the second feeding section 165 are parallel to each other and close to each other within a distance less than or equal to λ / 32 is conducive to electrically coupling the first feeding line 15 to the oscillation circuit unit 141 and fixedly coupled to the circuit substrate 13 at the first coupling section 152 in a welding manner, and electrically coupling the second feeding line 16 to the ground potential of the oscillation circuit unit 141 and fixedly coupled to the circuit substrate 13 at the second coupling section 166 in a welding manner.

[0110] Specifically, in this embodiment of the present invention, the distance between the first coupling section 152 and the second coupling section 166 in a direction perpendicular to the first feeding section 151 and the second feeding section 165 is less than or equal to λ / 8, and the distance between the first coupling section 152 and the second coupling section 166 in a direction parallel to the first feeding section 151 and the second feeding section 165 is less than or equal to λ / 8. In this way, while ensuring the low loss characteristics between the first feeding section 151 and the second feeding section 165, the length and shape design of the first coupling section 152 and the second coupling section 166 can meet the corresponding impedance matching and resonant frequency design, and enhance the reflection effect of the electromagnetic reflection surface 12 on the radiation from the first radiation source 111 and the second radiation source 112 to the direction of the electromagnetic reflection surface 12.

[0111] It is worth mentioning that in this variant embodiment of the present invention, the first coupling section 152 extends from the end of the first feeding section 151 opposite to the first feeding terminal 1111 in a direction perpendicular to the first feeding section 151 and in a direction parallel to the first feeding section 151, and the second coupling section 166 extends from the end of the second feeding section 165 opposite to the second feeding terminal 1121 in a direction perpendicular to the second feeding section 165 and in a direction parallel to the second feeding section 165. In some embodiments of the present invention, the first coupling section 152 may be configured to extend from an end of the first feeding section 151 opposite to the first feeding terminal 1111 in a direction perpendicular to the first feeding section 151 and in a direction parallel to the first feeding section 151, such as the first coupling section 152 is a columnar arc-shaped conductive line extending from an end of the first feeding section 151 opposite to the first feeding terminal 1111 in a direction perpendicular to the first feeding section 151 and in a direction parallel to the first feeding section 151; similarly, the second coupling section 166 may be configured to extend from an end of the second feeding section 165 opposite to the second feeding terminal 1121 in a direction perpendicular to the second feeding section 165 and in a direction parallel to the second feeding section 165, such as the second coupling section 166 is a columnar arc-shaped conductive line extending from an end of the second feeding section 165 opposite to the second feeding terminal 1121 in a direction perpendicular to the second feeding section 165 and in a direction parallel to the second feeding section 165, and the present invention is not limited to this.

[0112] Furthermore, in this variant embodiment of the present invention, the high-gain microwave Doppler detection module 10 further includes a fixing seat 17, wherein the fixing seat 17 is fittedly arranged on a side of the circuit substrate 13 bearing the electromagnetic reflection surface 12, wherein the first feeding line 15 and the second feeding line 16 are partially clamped and fixed to the fixing seat 17, so as to help maintain the first feeding section 151 and the second feeding section 165 parallel to each other and close to each other within a distance less than or equal to λ / 32, thereby helping to maintain the consistency of the high-gain microwave Doppler detection module 10 during the production process and the stability during use.

[0113] For example, referring to the accompanying drawings of the present invention, Fig. 9As shown, the S11 curve of the high-gain microwave Doppler detection module 10 according to the above-mentioned variant embodiment of the present invention is illustrated. It can be seen from the figure that based on the length and shape design of the first coupling section 152 and the second coupling section 166, the resonant frequency of the high-gain microwave Doppler detection module 10 can be designed in the frequency band of 5.8 GHz and allowed to be used in the field of microwave detection, and at the resonant frequency of the high-gain Doppler detection module 10, the high-gain microwave Doppler detection module 10 has a lower return loss.

[0114] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0115] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A high gain microwave Doppler detection module, characterized in that: include: At least one pair of dual coupled poles, wherein the pair of dual coupled poles comprises a first radiation source pole and a second radiation source pole, wherein the first radiation source pole has a first feeding end and is configured as a conductor extending with the first feeding end as an end, wherein the second radiation source pole has a second feeding end and is configured as a conductor extending with the second feeding end as an end, wherein the first radiation source pole and the second radiation source pole are respectively adapted to be fed by the same excitation signal feed source at the first feeding end and the second feeding end, wherein the first feeding end and the second feeding end are close to each other within a distance range less than or equal to λ / 32, wherein λ is a wavelength parameter corresponding to the feeding signal frequency of the excitation signal feed source, wherein the first radiation source pole is configured The first feeding end has a line length greater than or equal to λ / 16 and less than or equal to λ, wherein the second radiation source is configured to have a line length greater than or equal to λ / 16 and less than or equal to λ from the second feeding end, so that when the first radiation source and the second radiation source are fed by the same excitation signal feed source at the first feeding end and the second feeding end respectively, the current and potential distributions of the first radiation source and the second radiation source can be in a dual distribution state with the midpoint of the line connecting the first feeding end and the second feeding end, so that the first radiation source is coupled to the corresponding position of the second radiation source along the first radiation source from the first feeding end along the second radiation source from the second feeding end; and An electromagnetic reflection surface, wherein the dual coupling poles are arranged at intervals from the electromagnetic reflection surface in a space corresponding to the electromagnetic reflection surface, wherein the distance between the midpoint of the line connecting the first feeding end and the second feeding end and the electromagnetic reflection surface satisfies being greater than or equal to λ / 32 and less than or equal to λ / 2, wherein the end of the first radiation source opposite to the first feeding end is close to the electromagnetic reflection surface relative to the first feeding end, and the end of the second radiation source opposite to the second feeding end is close to the electromagnetic reflection surface relative to the second feeding end, wherein the first radiation source and the second radiation source both have a size greater than or equal to λ / 32 and less than or equal to λ / 4 in a direction perpendicular to the electromagnetic reflection surface.

2. The high-gain microwave Doppler detection module according to claim 1, wherein the high-gain microwave Doppler detection module further comprises a circuit unit, wherein the circuit unit comprises an oscillating circuit unit and a mixing detection unit, wherein the mixing detection unit is electrically coupled to the oscillating circuit unit and the dual coupling pole, wherein the oscillating circuit unit is configured to allow being powered and outputting a feeding signal at its feed pole and being grounded at its ground pole to serve as an excitation signal feed source, wherein the first radiation source pole is electrically coupled to the feed pole of the oscillating circuit unit at the first feeding end, wherein the second radiation source pole is electrically connected to the ground pole of the oscillating circuit unit at the second feeding end, so that when the oscillating circuit unit is powered, the first radiation source pole and the second radiation source pole are co-source fed by the oscillating circuit unit at the first feeding end and the second feeding end respectively. 3 . The high-gain microwave Doppler detection module according to claim 2 , wherein the electromagnetic reflection surface is blocked between the dual coupling poles and the circuit unit.

4. The high-gain microwave Doppler detection module according to claim 3, wherein the high-gain microwave Doppler detection module further comprises a circuit substrate, wherein the electromagnetic reflection surface and the circuit unit are carried on the circuit substrate at two opposite surfaces of the circuit substrate.

5. The high-gain microwave Doppler detection module according to claim 4, wherein the high-gain microwave Doppler detection module further comprises a first feed line and a second feed line, wherein the first radiation source is electrically coupled to the feed of the oscillation circuit unit at the first feed end via the first feed line, and wherein the second radiation source is electrically connected to the ground of the oscillation circuit unit at the second feed end via the second feed line.

6. The high-gain microwave Doppler detection module according to claim 5, wherein the first feed line extends integrally from the first feed end to the first radiation source pole, and the second feed line extends integrally from the second feed end to the second radiation source pole. 7 . The high-gain microwave Doppler detection module according to claim 6 , wherein the first feeding line and the second feeding line are cylindrical straight electric wires parallel to each other.

8. A high-gain microwave Doppler detection module according to claim 6, wherein the first feed line has a first feeding section and a first coupling section extending integrally to the first feeding section in a direction deviating from the first feeding section, wherein the second feed line has a second feeding section and a second coupling section extending integrally to the second feeding section in a direction deviating from the second feeding section, wherein the first feeding section and the second feeding section are columnar straight conductive wires parallel to each other and extend from the first feeding end and the second feeding end respectively.

9. The high-gain microwave Doppler detection module according to claim 8, wherein the first feeding section is electrically coupled to the oscillation circuit unit and fixedly coupled to the circuit substrate via the first coupling section, and the second feeding section is electrically coupled to the ground potential of the oscillation circuit unit and fixedly coupled to the circuit substrate via the second coupling section.

10. The high-gain microwave Doppler detection module according to claim 9, wherein the first coupling segment and the second coupling segment extend integrally to the first feeding segment and the second feeding segment in directions away from each other, respectively, so as to form a state in which the distance between the first coupling segment and the second coupling segment in a direction perpendicular to the first feeding segment and the second feeding segment is greater than the distance between the first feeding segment and the second feeding segment. 11 . The high-gain microwave Doppler detection module according to claim 10 , wherein a distance between the first coupling section and the second coupling section in a direction perpendicular to the first feeding section and the second feeding section is less than or equal to λ / 8.

12. The high-gain microwave Doppler detection module according to claim 11, wherein the first coupling section extends from an end of the first feeding section opposite to the first feeding end in a direction perpendicular to the first feeding section and in a direction parallel to the first feeding section, and the second coupling section extends from an end of the second feeding section opposite to the second feeding end in a direction perpendicular to the second feeding section and in a direction parallel to the second feeding section.

13. The high-gain microwave Doppler detection module according to claim 11, wherein the first coupling segment extends from an end of the first feeding segment opposite to the first feeding end in a direction perpendicular to the first feeding segment and in a direction parallel to the first feeding segment, and the second coupling segment extends from an end of the second feeding segment opposite to the second feeding end in a direction perpendicular to the second feeding segment and in a direction parallel to the second feeding segment.

14. The high-gain microwave Doppler detection module according to claim 13, wherein the first coupling segment is a cylindrical arc-shaped conductive line extending from an end of the first feeding segment opposite to the first feeding end in both a direction perpendicular to the first feeding segment and a direction parallel to the first feeding segment, and the second coupling segment is a cylindrical arc-shaped conductive line extending from an end of the second feeding segment opposite to the second feeding end in both a direction perpendicular to the second feeding segment and a direction parallel to the second feeding segment.

15. The high-gain microwave Doppler detection module according to claim 11, wherein the high-gain microwave Doppler detection module further comprises a fixing seat, wherein the fixing seat is attached to a side of the circuit substrate bearing the electromagnetic reflecting surface, wherein the first feed line and the second feed line are partially clamped and fixed to the fixing seat. 16 . The high-gain microwave Doppler detection module according to claim 1 , wherein the first radiation source and the second radiation source are arranged symmetrically about a midpoint of a line connecting the first feeding end and the second feeding end.

17. The high-gain microwave Doppler detection module according to claim 16, wherein the first radiation source is configured as a columnar conductive line extending from the first feeding end at the second feeding end toward the first feeding end and in a direction close to the electromagnetic reflection surface, wherein the second radiation source is configured as a columnar conductive line extending from the second feeding end at the first feeding end toward the second feeding end and in a direction close to the electromagnetic reflection surface.

18. The high-gain microwave Doppler detection module according to claim 17, wherein the first radiation source and the second radiation source are bent once, and the first radiation source that is bent accordingly is a columnar conductive line extending from the first feeding end in the direction of the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, and the second radiation source that is bent accordingly is a columnar conductive line extending from the second feeding end in the direction of the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface, then the size of the first radiation source in the direction perpendicular to the electromagnetic reflection surface corresponds to a distance L11 between an end of the first radiation source opposite to the first feeding end and a bent portion of the first radiation source, wherein L11 satisfies λ / 32≤L11≤λ / 4, and the size of the second radiation source in the direction perpendicular to the electromagnetic reflection surface corresponds to a distance L21 between an end of the second radiation source opposite to the second feeding end and a bent portion of the second radiation source, wherein L21 satisfies λ / 32≤L21≤λ / 4. 19 . The high-gain microwave Doppler detection module according to claim 18 , wherein the distance between the midpoint of the line connecting the first feeding end and the second feeding end and the electromagnetic reflection surface is λ / 4. 20 . The high-gain microwave Doppler detection module according to claim 18 , wherein a distance between the first feeding end and the second feeding end is λ / 128.

21. The high-gain microwave Doppler detection module according to claim 18, wherein a line length parameter of the second radiation source defined between the second feeding end and an end opposite to the second feeding end is L2, and a line length parameter of the first radiation source defined between the first feeding end and an end opposite to the first feeding end is L1, wherein the second radiation source and the first radiation source are configured to satisfy that the line length from the second feeding end and the first feeding end respectively has a line length approaching λ / 4 within an error range of λ / 128, that is, the L1 and the L2 respectively satisfy 31λ / 128≤L1≤33λ / 128, 31λ / 128≤L2≤33λ / 128.

22. The high-gain microwave Doppler detection module according to claim 17, wherein the first radiation source is configured as a columnar conductive line extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, wherein the second radiation source is configured as a columnar conductive line extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface, then the dimension of the first radiation source in a direction perpendicular to the electromagnetic reflection surface corresponds to the distance between the end of the first radiation source opposite to the first feeding end and the first feeding end in a direction perpendicular to the electromagnetic reflection surface, and the dimension of the second radiation source in a direction perpendicular to the electromagnetic reflection surface corresponds to the distance between the end of the second radiation source opposite to the second feeding end and the second feeding end in a direction perpendicular to the electromagnetic reflection surface.

23. The high-gain microwave Doppler detection module according to claim 22, wherein the first radiation source is configured as a columnar straight conductive wire extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, wherein the second radiation source is configured as a columnar straight conductive wire extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface.

24. The high-gain microwave Doppler detection module according to claim 22, wherein the first radiation source is configured as a columnar arc-shaped conductive line extending from the first feeding end in a direction connecting the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, wherein the second radiation source is configured as a columnar arc-shaped conductive line extending from the second feeding end in a direction connecting the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface. 25 . The high-gain microwave Doppler detection module according to claim 24 , wherein the first radiation source electrode and the second radiation source electrode are cylindrical arc-shaped conductive wires bent in a direction toward the electromagnetic reflection surface. 26 . The high-gain microwave Doppler detection module according to claim 24 , wherein the first radiation source pole and the second radiation source pole are cylindrical arc-shaped conductive wires bent in a direction away from the electromagnetic reflection surface.

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