Multi-radiation-source dual-polarization microwave detection module and device

Abstract

The utility model discloses a multi-radiation-source dual-polarization microwave detection module and device, the multi-radiation-source dual-polarization microwave detection module comprises a reference ground and four radiation sources, and the four radiation sources are respectively named by a first radiation source, a second radiation source, a third radiation source and a fourth radiation source correspondingly. Wherein the polarization directions of the first radiation source and the second radiation source are opposite, the polarization directions of the third radiation source and the fourth radiation source are the same, and the third radiation source and the fourth radiation source are arranged on the two sides of a connecting line of the physical center point of the first radiation source and the physical center point of the second radiation source respectively. Wherein the polarization direction of the third radiation source and the polarization direction of the fourth radiation source are perpendicular to the polarization direction of the first radiation source and the polarization direction of the second radiation source, so that the beam angle of the multi-radiation-source dual-polarization microwave detection module is increased in the state of adopting the multi-radiation-source array layout, and a central radiation dead zone can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of microwave detection based on the Doppler effect principle, in particular to a multi-radiation source dual-polarization microwave detection module and device. Background Technique

[0002] With the development of Internet of Things technology, the demand for environmental detection in artificial intelligence, smart home, and intelligent security technologies, especially for the detection of the presence of human beings and the behavior state under the presence of human beings, is becoming more and more extensive. Among them, the microwave detection technology based on the Doppler effect principle, as an important hub for the connection between people and things, and things and things, has unique advantages in presence detection and behavior detection technologies. It can detect moving objects, such as human motion characteristics, movement characteristics, and micro-motion characteristics, and even human heartbeat and breathing characteristic information without infringing on human privacy. Therefore, it has a wide range of application requirements, such as intelligently adjusting the working state of corresponding electrical equipment based on the detection results to achieve intelligent interconnection between people and things, and things and things.

[0003] Specifically, a corresponding microwave detector directionally emits a microwave beam, receives a reflected echo formed by the reflection of the microwave beam by a corresponding object, and subsequently generates a Doppler intermediate frequency signal corresponding to the frequency difference between the microwave beam and the reflected echo through a mixing and detection method. Then, the amplitude fluctuation of the Doppler intermediate frequency signal corresponds to the Doppler effect generated by the movement of the corresponding object. In this way, based on the existence of an effective amplitude that satisfies the corresponding threshold setting in the Doppler intermediate frequency signal, the movement of the corresponding object is characterized. When applied to the detection of human activities, it can achieve intelligent interconnection between people and things and has a wide range of application prospects. In the current transmitting antennas used in the microwave detectors, based on the number of radiation sources of the transmitting antenna, the transmitting antenna can be divided into a multi-radiation source array antenna and a single-radiation source antenna. For any form of single-radiation source antenna, the corresponding microwave beam usually has a circular or elliptical shape in the cross-section perpendicular to the directional radiation direction. Correspondingly, when the microwave detector uses a single-radiation source antenna, the actual detection surface of the microwave detector intercepted by the horizontal ground in the indoor vertical detection application scenario is circular or elliptical. In this way, when the microwave detector is applied to the indoor vertical detection application scenario, in order to make the actual detection surface of the microwave detector cover the target detection surface to reduce the detection dead zone, it is usually necessary to increase the beam angle of the microwave beam.

[0004] However, for any form of single-radiation source antenna, the means to increase the beam angle of the microwave beam are relatively scarce at present, and the increase in the angle is not obvious. For the multi-radiation source array antenna, mainly based on the interference principle of electromagnetic waves, corresponding to Figure 1By arranging each radiation source at equal angles with the polarization direction as the radial direction, mutually repulsive beams are formed in the radiation space to increase the overall beam angle. However, this method will also form a central radiation dead zone between the mutually repulsive beams. Summary of the Invention

[0005] An object of the present invention is to provide a multi-radiation source dual-polarization microwave detection module and device. The multi-radiation source dual-polarization microwave detection module adopts a multi-radiation source array layout. While increasing the beam angle, it can reduce the central radiation dead zone to ensure the applicability of the multi-radiation source dual-polarization microwave detection module.

[0006] Another object of the present invention is to provide a multi-radiation source dual-polarization microwave detection module and device. The multi-radiation source dual-polarization microwave detection module includes a reference ground and four radiation sources. Each of the radiation sources is arranged in the form of a metal layer and is spaced apart from the reference ground on the same side of the reference ground to form a microstrip patch antenna with the reference ground. Each of the radiation sources has a feeding potential offset from its physical center point. The polarization direction corresponding to each radiation source is the direction of the line connecting the feeding potential of the radiation source to the physical center point. The four radiation sources are respectively named the first radiation source, the second radiation source, the third radiation source, and the fourth radiation source. The polarization directions of the first radiation source and the second radiation source are opposite. The third radiation source and the fourth radiation source have the same polarization direction and are respectively arranged on both sides of the line connecting the physical center points of the first radiation source and the second radiation source. The polarization directions of the third radiation source and the fourth radiation source tend to be perpendicular to the polarization directions of the first radiation source and the second radiation source within an error range of 30°. In this way, in the state of adopting a multi-radiation source array layout, the beam angle of the multi-radiation source dual-polarization microwave detection module is increased, and the central radiation dead zone can be reduced to ensure the applicability of the multi-radiation source dual-polarization microwave detection module.

[0007] Another object of the present invention is to provide a multi-radiation source dual-polarization microwave detection module and device. The polarization directions of the first radiation source and the second radiation source are reversely set in an opposite manner. In this way, in the state where the polarization directions of the first radiation source and the second radiation source are reversely set, the distance between the feeding potential of the first radiation source and the feeding potential of the second radiation source is reduced, which is beneficial to simplifying the layout of the feeding circuit of the multi-radiation source dual-polarization microwave detection module, and correspondingly beneficial to reducing the interference between the feeding circuit of the multi-radiation source dual-polarization microwave detection module and each radiation source.

[0008] Another object of the present utility model is to provide a multi-radiator dual-polarization microwave detection module and device, wherein the first radiator, the second radiator, and the third radiator are respectively disposed at their respective feed potentials and are connected to one end of a main feed line through a first branch feed line, a second branch feed line, and a third branch feed line. The other end of the main feed line is connected to the side of the fourth radiator opposite to the side where the feed potential is provided, so as to simultaneously feed the four radiators while the feed potential of the fourth radiator accesses the corresponding feed signal, thereby simplifying the layout of the feed lines of the multi-radiator dual-polarization microwave detection module.

[0009] Another object of the present utility model is to provide a multi-radiator dual-polarization microwave detection module and device, wherein L1, L2, and L3 are respectively the line lengths of the first branch feed line, the second branch feed line, and the third branch feed line, and L1, L2, and L3 satisfy: λ / 4 < L3 - L1 < 3λ / 4 and λ / 4 < L3 - L2 < 3λ / 4, where λ is the wavelength parameter corresponding to the frequency of the corresponding feed signal. Thus, within the appropriate range of the line length of the third branch feed line, circular polarization is avoided between the third radiator and the first radiator or the second radiator, which may otherwise disrupt the balanced microwave beam of the multi-radiator dual-polarization microwave detection module. Correspondingly, it is beneficial to maintain the balanced form of the microwave beam of the multi-radiator dual-polarization microwave detection module to ensure the applicability of the multi-radiator dual-polarization microwave detection module.

[0010] Another object of the present utility model is to provide a multi-radiator dual-polarization microwave detection module and device, wherein the line length L1 of the first branch feed line and the line length L2 of the second branch feed line are set to be equal within an error range of λ / 8, so that the first radiator and the second radiator with opposite polarization directions have feed phases that tend to be in phase. Correspondingly, it is beneficial to balance the microwave beam form of the multi-radiator dual-polarization microwave detection module to ensure the applicability of the multi-radiator dual-polarization microwave detection module.

[0011] Another object of the present utility model is to provide a multi-radiation source dual-polarization microwave detection module and device, wherein when the line length L1 of the first branch feed line and the line length L2 of the second branch feed line are set to be of equal length within the error range of λ / 8, the L1, L2 and L3 further satisfy: λ / 2-λ / 8≤L3-L1≤λ / 2+λ / 8 and λ / 2-λ / 8≤L3-L2≤λ / 2+λ / 8, that is, the third branch feed line is approximately λ / 2 longer than the first branch feed line and the second branch feed line, so that the third radiation source and the first radiation source and the second radiation source have a feeding phase that tends to be inversely phase, and correspondingly, the coupling between the third radiation source and the first radiation source and the second radiation source can be strengthened based on the aforementioned structural layout to further reduce the central radiation dead zone.

[0012] Another object of the present utility model is to provide a multi-radiation source dual-polarization microwave detection module and device, wherein L is the length of the main feed line, and L satisfies: 3λ / 4<L3+L<5λ / 4, so that the third radiation source and the fourth radiation source with the same polarization direction have feeding phases tending to be opposite, and correspondingly, based on the aforementioned structural layout, while increasing the beam angle, the coupling between the fourth radiation source and the first radiation source and the second radiation source is strengthened to further reduce the central radiation dead zone.

[0013] In order to achieve at least one of the above purposes, the utility model provides a multi-radiation source dual-polarization microwave detection module, the multi-radiation source dual-polarization microwave detection module comprising:

[0014] a reference ground; and

[0015] Four radiation sources, wherein each of the radiation sources is arranged in the form of a metal layer and is spaced from the reference ground on the same side of the reference ground to form a microstrip patch antenna with the reference ground, wherein each of the radiation sources has a feed potential deviated from its physical center point, and the polarization direction corresponding to each of the radiation sources is the direction of a line connecting the feed potential of the radiation source to the physical center point, and the four radiation sources are named a first radiation source, a second radiation source, a third radiation source, and a fourth radiation source, respectively, wherein the polarization directions of the first radiation source and the second radiation source are opposite, and the third radiation source and the fourth radiation source have the same polarization direction and are respectively arranged on both sides of a line connecting the physical center point of the first radiation source and the physical center point of the second radiation source, wherein the polarization directions of the third radiation source and the fourth radiation source are perpendicular to the polarization directions of the first radiation source and the second radiation source.

[0016] In one embodiment, the first radiation source, the second radiation source, and the third radiation source are respectively disposed such that their respective feed potentials are connected to one end of a main feed line through a first branch feed line, a second branch feed line, and a third branch feed line. The other end of the main feed line is connected to the side of the fourth radiation source opposite to the side where the feed potential is provided, so as to realize the feeding of the four radiation sources while the feed potential of the fourth radiation source is connected to the corresponding feed signal.

[0017] In one embodiment, taking L1 and L2 as the line lengths of the first branch feed line and the second branch feed line respectively, L1 and L2 are set to be of equal length within an error range of λ / 8, where λ is the wavelength parameter corresponding to the frequency of the corresponding feed signal.

[0018] In one embodiment, taking L3 as the line length of the third branch feed line, L1, L2, and L3 satisfy: λ / 4 < L3 - L1 < 3λ / 4 and λ / 4 < L3 - L2 < 3λ / 4.

[0019] In one embodiment, L1, L2, and L3 further satisfy: λ / 2 - λ / 8 ≤ L3 - L1 ≤ λ / 2 + λ / 8 and λ / 2 - λ / 8 ≤ L3 - L2 ≤ λ / 2 + λ / 8.

[0020] In one embodiment, the third branch feed line is designed to be bent.

[0021] In one embodiment, at least one of the radiation sources is provided with at least one slot.

[0022] In one embodiment, taking L as the line length of the main feed line, L satisfies: 3λ / 4 < L3 + L < 5λ / 4.

[0023] In one embodiment, the polarization directions of the first radiation source and the second radiation source are set in a reverse manner.

[0024] According to another aspect of the present invention, the present invention further provides a multi-radiation source dual-polarization microwave detection device, which includes:

[0025] Any one of the foregoing multi-radiation source dual-polarization microwave detection modules; and

[0026] A microwave chip, wherein at least one of the multi-radiation source dual-polarization microwave detection modules is fed and connected to the feed output port of the microwave chip.

[0027] Through the understanding of the subsequent description and the drawings, the further objects and advantages of the present invention will be fully reflected. Description of the Drawings

[0028] Figure 1 It is a simulation schematic diagram of a multi-radiator array antenna with a four-radiator structure existing in the prior art.

[0029] Figure 2 It is a simulation schematic diagram of a multi-radiator dual-polarization microwave detection module according to an embodiment of the present invention.

[0030] Figure 3A It is a structural schematic diagram of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0031] Figure 3B It is another structural schematic diagram of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0032] Figure 4A It is a schematic diagram of a feeding structure of a radiator of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0033] Figure 4B It is another schematic diagram of a feeding structure of a radiator of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0034] Figure 4C It is another schematic diagram of a feeding structure of a radiator of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0035] Figure 4D It is another schematic diagram of a feeding structure of a radiator of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention.

[0036] Figure 4E It is another schematic diagram of a feeding structure of a radiator of a multi-radiator dual-polarization microwave detection device according to an embodiment of the present invention. Detailed implementation manners

[0037] 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 in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present invention.

[0038] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" cannot be understood as a limitation on the number.

[0039] The present utility model provides a multi-radiator dual-polarization microwave detection module and device. The multi-radiator dual-polarization microwave detection module adopts a multi-radiator array layout. While increasing the beam angle, it can reduce the central radiation dead zone to ensure the applicability of the multi-radiator dual-polarization microwave detection module.

[0040] Specifically, referring to Figure 2 as shown in the accompanying drawings of the specification of the present utility model, the structure of a multi-radiator dual-polarization microwave detection module according to an embodiment of the present utility model and the radiation pattern corresponding to this structure are schematically shown. The multi-radiator dual-polarization microwave detection module includes a reference ground 10 and four radiators 20. Each of the radiators 20 is provided in the form of a metal layer and is spaced apart from the reference ground 10 on the same side of the reference ground 10 to form a microstrip patch antenna with the reference ground 10. Each of the radiators 20 has a feeding position 21 deviating from its physical center point. The polarization direction corresponding to each radiator 20 is the direction of the line connecting the feeding position 21 of the radiator 20 to the physical center point. The four radiators 20 are respectively named the first radiator 201, the second radiator 202, the third radiator 203, and the fourth radiator 204. The polarization directions of the first radiator 201 and the second radiator 202 are opposite. The third radiator 203 and the fourth radiator 204 have the same polarization direction and are respectively arranged on both sides of the line connecting the physical center points of the first radiator 201 and the second radiator 202. The polarization directions of the third radiator 203 and the fourth radiator 204 tend to be perpendicular to the polarization directions of the first radiator 201 and the second radiator 202 within an error range of 30°. In this way, in the state of adopting a multi-radiator array layout, the beam angle of the multi-radiator dual-polarization microwave detection module can be increased, and the central radiation dead zone can be reduced to ensure the applicability of the multi-radiator dual-polarization microwave detection module.

[0041] It is worth mentioning that when the reverse polarization component between the two radiators 20 is greater than the cross-polarization component, it can be considered that they have reverse polarization directions. And when the same polarization component between the two radiators 20 is greater than the cross-polarization component, it can be considered that they have the same polarization directions. Therefore, when identifying the same, reverse, and perpendicular relationships in the polarization directions between the two radiators 20, the maximum error should be controlled within an error range of less than 45°, and preferably within an error range of less than or equal to 30°.

[0042] Similarly, the in-phase and anti-phase relationships between the feeding phases of the radiation sources 20 are also for forming the relationships of mutual repulsion and attraction in the electric field between the corresponding radiation sources 20 to generate corresponding coupling characteristics. When identifying the in-phase and anti-phase relationships between the feeding phases of the radiation sources 20, the maximum error between the feeding phases should also be controlled within an error range of less than 45°, and preferably within an error range of less than or equal to 30° when the corresponding feeding phases can be accurately obtained.

[0043] Furthermore, in this embodiment of the utility model, the polarization directions of the first radiation source 201 and the second radiation source 202 are reversely arranged in a back-to-back manner, so as to reduce the distance between the feeding potential 21 of the first radiation source 201 and the feeding potential 21 of the second radiation source 202 in the state where the polarization directions of the first radiation source 201 and the second radiation source 202 are reversely arranged, which is beneficial to simplifying the layout of the feeding lines of the multi-radiation-source dual-polarization microwave detection module, and correspondingly beneficial to reducing the interference between the feeding lines of the multi-radiation-source dual-polarization microwave detection module and the radiation sources 20.

[0044] That is to say, in some embodiments of the utility model, the polarization directions of the first radiation source 201 and the second radiation source 202 can also be reversely arranged in a face-to-face manner, and the utility model does not limit this.

[0045] Furthermore, in this embodiment of the utility model, the first radiation source 201, the second radiation source 202, and the third radiation source 203 are arranged such that their respective feeding potentials 21 are respectively connected to one end of a main feeding line 30 through a first branch feeding line 301, a second branch feeding line 302, and a third branch feeding line 303, and the other end of the main feeding line 30 is connected to the side of the fourth radiation source 204 opposite to the side where the feeding potential 21 is provided, so as to simultaneously realize the feeding of the four radiation sources 20 in the state where the feeding potential 21 of the fourth radiation source 204 accesses the corresponding feeding signal, and simplify the layout of the feeding lines of the multi-radiation-source dual-polarization microwave detection module.

[0046] Further, in this embodiment of the present utility model, taking L1 and L2 as the line lengths of the first branch feeder 301 and the second branch feeder 302 respectively, where L1 and L2 are set to be equal in length within an error range of λ / 8, and λ is the wavelength parameter corresponding to the frequency of the corresponding feeding signal, so that the first radiation source 201 and the second radiation source 202 with opposite polarization directions have feeding phases that tend to be in phase, which is conducive to balancing the microwave beam pattern of the multi-radiation source dual-polarization microwave detection module to ensure the applicability of the multi-radiation source dual-polarization microwave detection module.

[0047] Specifically, when identifying the in-phase and anti-phase relationships between the feeding phases of the radiation sources 20 based on the phase difference corresponding to the feeding transmission distance (electrical length), since the physical length corresponding to the electrical length varies greatly based on the material of the corresponding feeder and the dielectric constant of the carrier medium, and this variation ratio will be further amplified when the frequency of the corresponding feeding signal is high and the wavelength is short. Therefore, when identifying the in-phase and anti-phase relationships between the feeding phases of the radiation sources 20 based on the physical feeding transmission distance difference, the corresponding error range should be maintained at a physical length of λ / 8 corresponding to a maximum error of 45°.

[0048] Further, taking L3 as the line length of the third branch feeder 303, L1, L2, and L3 satisfy: λ / 4 < L3 - L1 < 3λ / 4 and λ / 4 < L3 - L2 < 3λ / 4, so as to avoid circular polarization between the third radiation source 203 and the first radiation source 201 or the second radiation source 202 within the appropriate length range of the third branch feeder 303, which would otherwise damage the microwave beam of the balanced multi-radiation source dual-polarization microwave detection module. This is conducive to maintaining the balanced microwave beam pattern of the multi-radiation source dual-polarization microwave detection module to ensure the applicability of the multi-radiation source dual-polarization microwave detection module.

[0049] Specifically, in this embodiment of the present utility model, when the line lengths L1 of the first branch feeder 301 and L2 of the second branch feeder 302 are set to be equal in length within an error range of λ / 8, L1, L2, and L3 further satisfy: λ / 2 - λ / 8 ≤ L3 - L1 ≤ λ / 2 + λ / 8 and λ / 2 - λ / 8 ≤ L3 - L2 ≤ λ / 2 + λ / 8. That is to say, the third branch feeder 303 is about λ / 2 longer than both the first branch feeder 301 and the second branch feeder 302, so that the third radiation source 203 and the first radiation source 201 and the second radiation source 202 all have feeding phases that tend to be out of phase. Correspondingly, based on the foregoing structural layout, the coupling between the third radiation source 203 and the first radiation source 201 and the second radiation source 202 can be strengthened to further reduce the central radiation dead zone.

[0050] Further, in this embodiment of the present utility model, the third branch feeder 303 is designed to be bent, so as to reduce the distance between the third radiation source 203 and the first radiation source 201 and the second radiation source 202 based on the foregoing structural layout, which is correspondingly beneficial to the miniaturization design of the multi-radiation source dual-polarization microwave detection module, and at the same time can further strengthen the coupling between the third radiation source 203 and the first radiation source 201 and the second radiation source 202 to reduce the central radiation dead zone.

[0051] Further, in this embodiment of the present utility model, where L is the line length of the main feeder 30, the L satisfies: 3λ / 4 < L3 + L < 5λ / 4, so that the third radiation source 203 and the fourth radiation source 204 with the same polarization direction have feeding phases that tend to be out of phase. Correspondingly, based on the foregoing structural layout, while increasing the beam angle, the coupling between the fourth radiation source 204 and the first radiation source 201 and the second radiation source 202 can be strengthened to further reduce the central radiation dead zone.

[0052] It is worth mentioning that in the multi-radiation source dual-polarization microwave detection module of the present utility model, the forms of the radiation sources 20 are not limited to be the same, and the specific shapes of the radiation sources 20 do not constitute a limitation to the present utility model. In some embodiments of the present utility model, the radiation source 20 can also be set to be circular, elliptical, and have a structural design with two opposite sides being concave / convex, etc.

[0053] In addition, when the perimeter of the radiation source 20 matches the frequency of the feeding signal it accesses, the radiation source 20 can also have at least one slot 22 corresponding to this embodiment of the present utility model to reduce the size of the radiation source 20 in a state where the corresponding perimeter range is satisfied, thus being beneficial to the miniaturization design of the multi-radiation source dual-polarization microwave detection module.

[0054] It can be understood that in the multi-radiator dual-polarization microwave detection module of the present utility model, when the radiator 20 is set as a centrosymmetric figure such as a rectangle, a circle, an ellipse, etc., the physical center point of the radiator 20 is the symmetric center of this centrosymmetric figure. And when the radiator 20 is a planar figure of a non-centrosymmetric figure (such as the non-centrosymmetric figure formed based on the structure design of the slot 22 corresponding to this embodiment of the present utility model), the physical center point of the radiator 20 can be understood as the mass center of this planar figure with uniform thickness and density. Generally speaking, the radiator 20 is an axisymmetric figure with at least one axis of symmetry. The feeding potential 21 and the physical center point of the radiator 20 are located on the same axis of symmetry of the radiator 20, and the feeding potential 21 deviates from the physical center point of the radiator 20 and is closer to the edge of the radiator 20 on this axis of symmetry relative to the physical center point of the radiator 20. Then the polarization direction of the radiator 20 can generally be understood as the direction from the feeding potential 21 along the axis of symmetry where the feeding potential 21 is located away from this edge (the edge close to the feeding potential 21). That is to say, in the description of the present utility model, the introduction of the physical center point of the radiator 20 is only to define the polarization direction of the radiator 20 based on the structural form of the radiator 20. In the state where the position of the physical center point of the radiator 20 is difficult to visually determine, the connection line direction (polarization direction) from the feeding potential 21 to the physical center point of the radiator 20 can be defined in accordance with any of the above methods and be consistent.

[0055] Particularly, in the multi-radiator dual-polarization microwave detection device of the present utility model, the multi-radiator dual-polarization microwave detection module can both be used as a transmitting module and a receiving module simultaneously, or can correspond to Figure 3A and Figure 3B adopt different multi-radiator dual-polarization microwave detection modules as the transmitting module and the receiving module respectively, and the present utility model does not limit this. Correspondingly, in some embodiments of the present utility model, the multi-radiator dual-polarization microwave detection device includes at least one multi-radiator dual-polarization microwave detection module and a microwave chip, and at least one multi-radiator dual-polarization microwave detection module is fed and connected to the feeding output port of the microwave chip.

[0056] It is worth mentioning that in this embodiment of the present utility model, each radiator 20 is exemplified by a microstrip feeding structure. Correspondingly, the radiator 20 is connected to the corresponding feeding signal through a feeding wire that conducts and extends along the edge of the radiator 20 (including the edge of the concave structure, such as the bottom of the edge slot). Then the feeding potential 21 is the position on the radiator 20 connected to this feeding wire. The feeding structure of the radiator 20 does not constitute a limitation to the present utility model, and the radiator 20 can also correspond to Figure 4AA feeding signal is introduced through a corresponding feeder line at a position of the metallized via structure deviating from the physical center point of the radiation source 20, and the feeding potential 21 corresponds to this position where the feeding signal is introduced on the radiation source 20; or corresponding to Figure 4B A feeding signal is introduced through a corresponding feeder line in a coupled manner at a section of the edge of the radiation source 20 in an edge feeding structure, and the feeding potential 21 can be equivalently taken as the center position of this section of the edge; or corresponding to Figure 4C / 4D In a corner feeding manner, in-phase feeding signals are introduced at two corners of the radiation source 20, and the feeding potential 21 can be equivalently taken as the center position of the edge section between the two corners of the radiation source 20.

[0057] It can be understood that when the radiation source 20 corresponds to Figure 4C / 4D In a corner feeding manner, in-phase feeding signals are introduced at two corners thereof, the radiation source 20 is equivalent to introducing feeding signals with the same phase at two feeding points 211 through a metallized via structure. Then, for the purpose of determining the polarization direction of the radiation source 20, when the radiation source 20 corresponds to Figure 4E Feeding signals with the same phase are introduced at the two feeding points 211, the corresponding feeding potential 21 can also be equivalently taken as the center position of the connection line between the two feeding points 211 without requiring whether the center position is located on the radiation source 20, and the feeding phase of the radiation source 20 at the feeding potential 21 can be regarded as in phase with the feeding phase at any one of the feeding points 211.

[0058] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been demonstrated and explained in the embodiments. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.

Claims

1. Multi-radiation source dual-polarization microwave detection module, characterized in that: include: A reference place; and Four radiation sources, wherein each of the radiation sources is arranged in the form of a metal layer and is spaced from the reference ground on the same side of the reference ground to form a microstrip patch antenna with the reference ground, wherein each of the radiation sources has a feed potential deviated from its physical center point, and the polarization direction corresponding to each of the radiation sources is the direction of a line connecting the feed potential of the radiation source to the physical center point, and the four radiation sources are named as a first radiation source, a second radiation source, a third radiation source, and a fourth radiation source, respectively, wherein the polarization directions of the first radiation source and the second radiation source are opposite, and the third radiation source and the fourth radiation source have the same polarization direction and are respectively arranged on both sides of a line connecting the physical center point of the first radiation source and the physical center point of the second radiation source, wherein the polarization directions of the third radiation source and the fourth radiation source are perpendicular to the polarization directions of the first radiation source and the second radiation source.

2. The multi-radiation source dual-polarization microwave detection module according to claim 1, wherein the first radiation source, the second radiation source, and the third radiation source are arranged at their respective feeding potentials and are respectively connected to one end of a main feed line via a first branch feed line, a second branch feed line, and a third branch feed line, wherein the other end of the main feed line is connected to a side of the fourth radiation source opposite to the side where the feeding potential is arranged, so that the four radiation sources can be fed simultaneously when the feeding potential of the fourth radiation source is connected to a corresponding feeding signal.

3. The multi-radiation source dual-polarization microwave detection module according to claim 2, wherein L1 and L2 are the line lengths of the first branch feed line and the second branch feed line respectively, and L1 and L2 are set to be of equal length within an error range of λ / 8, wherein λ is a wavelength parameter corresponding to the frequency of the corresponding feed signal.

4. The multi-radiation source dual-polarization microwave detection module according to claim 3, wherein L3 is the line length of the third branch feed line, and L1, L2 and L3 satisfy: λ / 4<L3-L1<3λ / 4 and λ / 4<L3-L2<3λ / 4. 5 . The multi-radiation source dual-polarization microwave detection module according to claim 4 , wherein L1 , L2 and L3 further satisfy: λ / 2-λ / 8≤L3-L1≤λ / 2+λ / 8 and λ / 2-λ / 8≤L3-L2≤λ / 2+λ / 8. 6 . The multi-radiation source dual-polarization microwave detection module according to claim 5 , wherein the third branch feed line is designed to be bent.

7. The multi-radiation source dual-polarization microwave detection module according to claim 6, wherein at least one of the radiation sources is provided with at least one slot.

8. The multi-radiation source dual-polarization microwave detection module according to any one of claims 4 to 7, wherein L is the length of the main feed line, and L satisfies: 3λ / 4<L3+L<5λ / 4. 9 . The multi-radiation source dual-polarization microwave detection module according to claim 8 , wherein the polarization directions of the first radiation source and the second radiation source are oppositely arranged in an opposing manner.

10. A multi-radiation source dual-polarization microwave detection device, characterized in that: include: The multi-radiation source dual-polarization microwave detection module according to any one of claims 1 to 9; and A microwave chip, wherein at least one of the multi-radiation source dual-polarization microwave detection modules is fed and connected to a feed output port of the microwave chip.

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