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. 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.

[0010] 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.

[0011] 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.

[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 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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

[0021] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the first radiation source electrode and the second radiation source electrode are further grounded to reduce the impedance of the high-gain microwave Doppler detection module, so that the quality factor (i.e., Q value) of the high-gain microwave Doppler detection module is improved, which is beneficial to improving the anti-interference ability 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 the end of the first radiation source opposite to the first feeding end is integrally extended to the end of the second radiation source opposite to the second feeding end, so as to maintain the symmetrical structure between the first radiation source and the second radiation source, and to form a state in which the first radiation source and the second radiation source are grounded when one of the first radiation source and the second radiation source is grounded, which is conducive to simplifying the circuit connection structure of the high-gain microwave Doppler detection module.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the second feeder is arranged to surround the first feeder to form an electromagnetic shielding cavity, so that when the second feeder is grounded, the influence of the coupling between the second feeder and the first feeder on the coupling between the first radiation source and the second radiation source is reduced, and the interference of external electromagnetic radiation on the first feeder is shielded, which is beneficial to improving the anti-interference performance of the high-gain microwave Doppler detection module.

[0027] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection device includes the high-gain microwave Doppler detection module and has an electromagnetic shielding layer, wherein the electromagnetic shielding layer has a through hole, wherein the circuit substrate is arranged in a shielding space corresponding to one side of the electromagnetic shielding layer, wherein the first radiation source and the second radiation source are arranged in a space corresponding to the other side of the electromagnetic shielding layer, wherein the first feed line and the second feed line penetrate the electromagnetic shielding layer through the through hole to form an electrical connection between the first radiation source and the second radiation source and the circuit unit A path connection structure is provided, so that the first radiation source electrode and the second radiation source electrode are arranged in the space outside the shielded space to realize activity detection in the space outside the shielded space, wherein based on the coupling mode of the first radiation source electrode and the second radiation source electrode, the projection area of ​​the first radiation source electrode and the second radiation source electrode on the electromagnetic shielding layer in the direction perpendicular to the electromagnetic shielding layer can be reduced, which is beneficial to the concealment of the installation of the high-gain microwave Doppler detection module in the high-gain microwave Doppler detection device, and when the electromagnetic shielding layer is formed on the LED light board, it can avoid the formation of a dark area on the LED light board.

[0028] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the second feed line and the first feed line are implemented as a shielded wire in which the second feed line surrounds the first feed line, wherein the shielding wire is pluggably arranged to form a pluggable circuit connection structure between the first radiation source electrode and the second radiation source electrode and the circuit unit, and the size of the through hole of the electromagnetic shielding layer is required to be suitable for the shielding wire to pass through, which is conducive to reducing the size of the through hole, thereby facilitating maintaining the integrity of the electromagnetic shielding layer.

[0029] Another object of the present invention is to provide a high-gain microwave Doppler detection module, wherein the high-gain microwave Doppler detection module can avoid the formation of a detection dead zone based on a dual coupling method, while reducing the size requirements of the high-gain microwave Doppler detection module, which is beneficial to improving the concealment and detection stability of the high-gain microwave Doppler detection module installed in the high-gain microwave Doppler detection equipment.

[0030] According to one aspect of the present invention, the present invention provides a high-gain microwave Doppler detection module, the high-gain microwave Doppler detection module comprising:

[0031] 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 / 4, 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 a first radiation source pole and a second radiation source pole is a second radiation source pole, 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 / 4, 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 a first radiation source pole and a second radiation source pole, 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 ... The source is configured to satisfy a line length greater than or equal to λ / 16 from the first feeding end, wherein the second radiation source is configured to satisfy a line length greater than or equal to λ / 16 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; and

[0032] 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 greater than or equal to λ / 32, wherein the end of the first radiation source pole 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 pole opposite to the second feeding end is close to the electromagnetic reflection surface relative to the second feeding end.

[0033] 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.

[0034] 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 toward 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 toward the second feeding end and in a direction close to the electromagnetic reflection surface.

[0035] In one embodiment, the first radiation source extends from the first feeding end in a direction from the second feeding end to the first feeding end and in a direction close to the electromagnetic reflection surface, and the second radiation source extends from the second feeding end in a direction from the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In one embodiment, the second radiation source is configured to be tubular, wherein an extension direction of the second radiation source configured to be tubular from the second feeding end corresponds to an extension direction of a mirror image of the first radiation source in a direction from the first feeding end to the second feeding end.

[0042] In one embodiment, the first radiation source is a columnar conductive wire 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 a tubular conductive wire 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.

[0043] 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.

[0044] In one embodiment, the electromagnetic reflection surface is blocked between the dual coupling poles and the circuit unit.

[0045] 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.

[0046] 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.

[0047] In one embodiment, the second feeding line surrounds the first feeding line to form an electromagnetic shielding cavity.

[0048] In one embodiment, the first radiation source is further electrically connected to a ground of the oscillating circuit unit.

[0049] In one embodiment, the first radiation source is electrically connected to the second feeding line and is electrically connected to the ground of the oscillating circuit unit.

[0050] In one embodiment, the second feed line has a pair of slots from the end connected to the second radiation source along the direction of the first feed line, wherein the slots have a slot depth greater than or equal to λ / 128 from the end of the second feed line connected to the second radiation source along the direction of the first feed line, wherein the pair of slots define a first arm and a second arm on the second feed line, wherein the second radiation source extends conductively from the second arm of the second feed line, wherein the first radiation source extends conductively from the first feed line and the first arm of the second feed line and is electrically connected to the ground of the oscillation circuit unit.

[0051] In one embodiment, the first feeding line is electrically connected to the first arm, and the first radiation source is electrically connected to the first arm at the first feeding end.

[0052] Other purposes and advantages of the present invention will be further reflected through the specific implementation manner and the contents of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1A The schematic diagram of the structure of a microwave detection module with an existing columnar radiation source structure is shown in FIG.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Figure 4 FIG. 4 is a radiation pattern of the microwave Doppler detection module according to the above embodiment of the present invention.

[0058] 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.

[0059] Figure 6 Schematic diagram of the radiation direction of the microwave Doppler detection module according to the above variant embodiment of the present invention.

[0060] 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.

[0061] Figure 8 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.

[0062] Fig. 9 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.

[0063] Fig.10 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.

[0064] Fig.11 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. DETAILED DESCRIPTION

[0065] 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.

[0066] 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.

[0067] 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.

[0068] Referring to the accompanying drawings of the present invention Figure 3 As 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 the other 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.

[0069] 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.

[0070] 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 / 4, 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.

[0071] 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.

[0072] 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 to the second radiation source 112 from the first feeding end 1111 along the corresponding position of the second radiation source 112, thereby forming 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] It is worth mentioning that the electromagnetic reflection surface 12 is preferably 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, 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, thereby facilitating the improvement of the detection distance of the high-gain microwave Doppler detection module 10.

[0085] 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.

[0086] 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.

[0087] Further reference is made to the accompanying drawings of the present invention. Figure 4As 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.

[0088] 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.

[0089] For example, referring to the accompanying drawings of the present invention, Figure 5As 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.

[0090] 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.

[0091] Further reference is made to the accompanying drawings of the present invention. Figure 6As 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.

[0092] Further reference is made to the accompanying drawings of the present invention. Figures 7 to 9As shown, 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. The structure of the high-gain microwave Doppler detection module 10 according to different variant embodiments of the above-mentioned embodiment of the present invention is illustrated, wherein in these 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 the direction toward 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 to the second feeding end 1121 and at the first feeding end 1111 in the direction toward the second feeding end 1121 and in the direction close to the electromagnetic reflection surface 12, so as to maintain 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≤L2≤λ. While satisfying λ / 16≤L1≤λ, the sizes of the second radiation source 112 and the first radiation source 111 in the 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 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 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 the 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.

[0093] Specifically, corresponding to Figure 7In this variant embodiment 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 embodiment, 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, and 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.

[0094] Corresponds to Figure 8 and Fig. 9 In these two variant embodiments of the present invention, the first radiation source 111 and the second radiation source 112 are arranged in a bent 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.

[0095] 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. Figure 8 In this variant embodiment of the present invention, the first radiation source electrode 111 and the second radiation source electrode 112 are cylindrical arc-shaped conductive wires that are bent in a direction toward the electromagnetic reflection surface 12; corresponding to Fig. 9 In this variant embodiment of the present invention, the first radiation source 111 and the second radiation source 112 are columnar arc-shaped conductive wires that are bent in a direction away from the electromagnetic reflection surface 12 .

[0096] Further reference is made to the accompanying drawings of the present invention. Fig.10 As shown, the three-dimensional structure of the high-gain microwave Doppler detection module 10 according to another variant embodiment of the above-mentioned embodiment of the present invention is schematically shown. In particular, in this variant embodiment of the present invention, the second feeder 16 is arranged to surround the first feeder 15 to form an electromagnetic shielding cavity 161, so that when the second feeder 16 is grounded, the coupling between the second feeder 16 and the first feeder 15 reduces the influence of the coupling between the first radiation source 111 and the second radiation source 112, and shields the interference of external electromagnetic radiation on the first feeder 15, thereby facilitating the improvement of the anti-interference performance of the high-gain microwave Doppler detection module 10.

[0097] Preferably, the second feed line 16 arranged in the form of surrounding the first feed line 15 is coaxial with the first feed line 15, so that when the first radiation source 111 is fed at the first feeding end 1111 through the first feed line 15, and the second radiation source 112 is fed at the second feeding end 1121 through the second feed line 16, it is beneficial to couple the first radiation source 111 and the second radiation source 112 in a dual manner.

[0098] In particular, different from the structure in the above-mentioned embodiment where 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, in some embodiments of the present invention, the second radiation source 112 is arranged in a tubular shape and extends from the second feeding end 1121 in an extending direction of the mirror image of the first radiation source 111, that is, the extending direction of the second radiation source 112 from the second feeding end 1121 corresponds to the extending direction of the mirror image of the first radiation source 111 in the direction from the first feeding end 1111 to the second feeding end 1121. For example, when the first radiation source 111 corresponds to Figure 5It is shown that when the first feeding end 1111 sequentially extends in the direction from the second feeding end 1121 to the first feeding end 1111 and in the direction close to the electromagnetic reflection surface 12, the mirror image sequence of the first radiation source 111 in the direction from the first feeding end 1111 to the second feeding end 1121 extends in the direction of the line from the first feeding end 1111 to the second feeding end 1121 and in the direction close to the electromagnetic reflection surface 12, that is, the second radiation source 112 extends in the direction of the line from the first feeding end 1111 to the second feeding end 1121 and in the direction close to the electromagnetic reflection surface 12 in the mirror image sequence of the first radiation source 111 from the second feeding end 1121. In this way, a dual coupling mode between the first radiation source 111 and the second radiation source 112 can also be formed.

[0099] Referring to the accompanying drawings of the present invention Fig.11 As shown, the three-dimensional structure of the high-gain microwave Doppler detection module 10 according to another variant embodiment of the above-mentioned variant embodiment of the present invention is illustrated. In particular, relative to the above-mentioned variant embodiment of the present invention, in this variant embodiment of the present invention, the first radiation source pole 111 is further electrically connected to the second feed line 16 and is grounded.

[0100] Specifically, in this variant embodiment of the present invention, the second feed line 16, which is arranged in the form of surrounding the first feed line 15 and is coaxial with the first feed line 15, is further provided with a pair of slots 162 from one end connected to the second radiation source 112 along the direction of the first feed line 111, wherein the pair of slots 162 define a first arm 163 and a second arm 164 on the second feed line 16, that is, the first arm 163 and the second arm 164 are respectively two parts of the second feed line 16 defined between the pair of slots 162, wherein the second radiation source 112 is conductively extended from the second feeding end 1121 to the second arm 164 of the second feed line 16, wherein the first radiation source 111 is conductively extended from the first feeding end 1111 to the first arm 163 of the second feed line 16 and is conductively connected to the first feed line 15 at the first feeding end 1111, so that the first radiation source 111 is grounded.

[0101] It is worth mentioning that the pair of slots 162 of the second feed line 16 have a slot depth greater than or equal to λ / 128 from the end of the second feed line 16 connected to the second radiation source 112 along the direction of the first feed line 111, so that when the first radiation source 111 is grounded via the first arm 163 of the second feed line 16, when the first radiation source 111 is fed and excited at the first feeding end 1111 via the first feed line 15, and when the second radiation source 112 is fed at the second feeding end 1121 via the second feed line 16, it is ensured that the first radiation source 111 and the second radiation source 112 are coupled in a dual manner.

[0102] It is understandable that, based on the depth setting of the slot 162 , a corresponding impedance can be formed, so as to facilitate impedance matching between the oscillating circuit unit 141 and the first feeding line 15 , the second feeding line 16 and the dual coupling pole 11 .

[0103] In particular, in this variant embodiment of the present invention, the first radiation source 111 and the second radiation source 112 are bent once so as to reduce the size of the second radiation source 112 and the first radiation source 111 in a direction parallel to the line connecting the first feeding end 1111 and the second feeding end 1121 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, and forming the first radiation source 112. The end of the second radiation source 11 opposite to the first feeding end 1111 is in a state close to the electromagnetic reflection surface 12 relative to the first feeding end 1111, and the end of the second radiation source 112 opposite to the second feeding end 1121 is in a state 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 fields.

[0104] 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.

[0105] 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 and a second radiation source, wherein the first radiation source 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 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 and the second radiation source 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 / 4, wherein λ is a wavelength parameter corresponding to the feeding signal frequency of the excitation signal feed source, wherein the first radiation source is configured to satisfy a line length greater than or equal to λ / 16 from the first feeding end, wherein the second radiation source is configured to satisfy a line length greater than or equal to λ / 16 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, wherein 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 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 the direction of the first feeding end to the second feeding end and in a direction close to the electromagnetic reflection surface; 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 greater than or equal to λ / 32, wherein the end of the first radiation source pole 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 pole opposite to the second feeding end is close to the electromagnetic reflection surface relative to the second feeding end.

2. The high-gain microwave Doppler detection module according to claim 1, wherein the first radiation source pole and the second radiation source pole are bent once, and the corresponding bent first radiation source pole is a columnar conductive wire extending from the first feeding end in the direction of the second feeding end toward the first feeding end and in the direction close to the electromagnetic reflection surface, and the corresponding bent second radiation source pole is a columnar conductive wire extending from the second feeding end in the direction of the first feeding end toward the second feeding end and in the direction close to the electromagnetic reflection surface.

3. The high-gain microwave Doppler detection module according to claim 1, wherein the first radiation source extends from the first feeding end in the direction of the second feeding end toward the first feeding end and in the direction close to the electromagnetic reflection surface, and the second radiation source extends from the second feeding end in the direction of the first feeding end toward the second feeding end and in the direction close to the electromagnetic reflection surface.

4. The high-gain microwave Doppler detection module according to claim 3, 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.

5. The high-gain microwave Doppler detection module according to claim 3, 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. 6 . The high-gain microwave Doppler detection module according to claim 5 , wherein the first radiation source pole and the second radiation source pole are cylindrical arc-shaped conductive wires bent in a direction toward the electromagnetic reflection surface.

7. The high-gain microwave Doppler detection module according to claim 5, 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.

8. The high-gain microwave Doppler detection module according to any one of claims 1 to 7, 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.

9. A high-gain microwave Doppler detection module according to any one of claims 1 to 7, wherein the high-gain microwave Doppler detection module further comprises a circuit unit, wherein the circuit unit comprises 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. 10 . The high-gain microwave Doppler detection module according to claim 9 , wherein the electromagnetic reflection surface is blocked between the dual coupling poles and the circuit unit.

11. The high-gain microwave Doppler detection module according to claim 10, 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.

12. The high-gain microwave Doppler detection module according to claim 11, 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. 13 . The high-gain microwave Doppler detection module according to claim 12 , wherein the second feeding line surrounds the first feeding line to form an electromagnetic shielding cavity. 14 . The high-gain microwave Doppler detection module according to claim 13 , wherein the first radiation source is further electrically connected to a ground of the oscillating circuit unit. 15 . The high-gain microwave Doppler detection module according to claim 14 , wherein the first radiation source is electrically connected to the second feed line and is electrically connected to the ground of the oscillating circuit unit.

16. The high-gain microwave Doppler detection module according to claim 15, wherein the second feed line has a pair of slots from the end connected to the second radiation source along the direction of the first feed line, wherein the slots have a slot depth greater than or equal to λ / 128 from the end of the second feed line connected to the second radiation source along the direction of the first feed line, wherein a pair of the slots define a first arm and a second arm on the second feed line, wherein the second radiation source extends conductively from the second arm of the second feed line, wherein the first radiation source extends conductively from the first feed line and the first arm of the second feed line and is electrically connected to the ground of the oscillation circuit unit. 17 . The microwave Doppler detection module according to claim 16 , wherein the first feeding line is electrically connected to the first arm, and wherein the first radiation source is electrically connected to the first arm at the first feeding end.

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