High-gain double-antenna microwave detection device

Abstract

The utility model provides a high gain double antenna microwave detection device, which comprises a reference ground, a plane radiation source, a pair of dual coupling poles and an auxiliary oscillator, the plane radiation source and the dual coupling poles are arranged on the same side of the reference ground, the vertical projection of the plane radiation source and the vertical projection of the dual coupling poles on the reference ground are intersected, and the plane radiation source and the dual coupling poles are arranged on the same side of the reference ground. Wherein a near-field medium space is defined by taking a physical center point of the planar radiation source as a sphere center and taking lambda / 2 as an inner radius and 3 lambda / 2 as an outer radius within an error range of + / -lambda / 4; wherein the auxiliary oscillator is completely or partially arranged in the near-field medium space around the directional radiation direction of the high-gain double-antenna microwave detection device, and is provided with at least one metal layer around the directional radiation direction of the high-gain double-antenna microwave detection device; the high-gain double-antenna microwave detection device can maintain a large beam angle while increasing the gain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of microwave detection, especially a high-gain double-antenna microwave detection device. BACKGROUND

[0002] As an important hub of the connection between people and things, and things and things, microwave detection technology has unique advantages in behavior detection and existence detection technology. It can form a detection area in a target space by emitting a microwave beam to the target space without invading privacy, receive a reflected echo formed by the microwave beam reflected by the corresponding object in the detection area, and output a Doppler intermediate frequency signal corresponding to the frequency and phase difference between the microwave beam and the reflected echo based on the subsequent mixed frequency detection mode. Based on the principle of Doppler effect, the fluctuation of the Doppler intermediate frequency signal in amplitude corresponds to the movement of the object and is suitable for representing human activity in human activity detection applications. When applied to the detection of human activity, including the detection of breathing and heartbeat activity of the human body, it can realize intelligent interconnection between people and things and has wide application prospects. The microwave detection antenna is the basic hardware for emitting the microwave beam and / or receiving the reflected echo in microwave detection technology. Its structure and performance parameters associated with the structure directly affect the structure design and performance of the corresponding microwave detection device.

[0003] The common microwave detection antenna at present mainly includes columnar antennas and planar antennas. The planar antenna is widely used because of its directional radiation capability. The radiation gain of the planar antenna in the industry can reach about 7dBi at most. The radiation gain of the planar antenna directly corresponds to the detection sensitivity and detection distance of the antenna. For high installation and other special use scenarios, the antenna gain needs to be improved to ensure sufficient detection distance. The current improvement method usually compresses the planar beam angle of the radiation space, which specifically improves the antenna gain by concentrating electromagnetic radiation energy through the principle of beam synthesis. However, when the gain is improved, the detection distance is increased, but the planar beam angle of the antenna corresponding to the detection space is greatly reduced to about 30 degrees. In high installation scenarios, in addition to requiring the radiation gain of the antenna to reach a certain level, the antenna also needs to have a large beam angle for the detection space, otherwise a large number of antennas are needed to meet the coverage of the corresponding area. Therefore, the existing microwave detection antenna cannot meet the needs of high installation use scenarios. SUMMARY

[0004] One purpose of the utility model is to provide a high-gain double-antenna microwave detection device, which can increase the radiation distance in the directional radiation direction to meet the application scenarios of high installation.

[0005] Another purpose of the utility model lies in providing a high gain double antenna microwave detection device, wherein the radiation distance of the high gain double antenna microwave detection device in the directional radiation direction is increased, and the high gain double antenna microwave detection device can have a farther detection distance in the side-mounted application scene.

[0006] Another purpose of the utility model lies in providing a high gain double antenna microwave detection device, wherein the radiation distance of the high gain double antenna microwave detection device in the directional radiation direction is increased, and the high gain double antenna microwave detection device can have a farther detection distance in the side-mounted application scene.

[0007] Another purpose of the utility model lies in providing a high-gain double-antenna microwave detection device, wherein the high-gain double-antenna microwave detection device preferably is arranged to transmit feed to the first feed point to make the planar radiation source and the reference ground serve as a transmitting antenna, and receive feed to the first feed end to make the dual-coupled dipole and the reference ground serve as a receiving antenna, wherein the planar radiation source has a polarization direction along the line connecting the first feed point to the physical center point of the planar radiation source, wherein the dual-coupled dipole has a polarization direction along the line connecting the first feed end to the second feed end, wherein the polarization direction of the planar radiation source and the polarization direction of the dual-coupled dipole are in a spatially orthogonal state, so as to improve the isolation of the antennas formed by the planar radiation source and the dual-coupled dipole with the reference ground respectively, and further ensure the detection accuracy and stability of the high-gain double-antenna microwave detection device when used for transmitting-receiving-separated Doppler microwave detection.

[0008] According to one aspect of the utility model, the utility model provides a high-gain double-antenna microwave detection device, wherein the high-gain double-antenna microwave detection device comprises:

[0009] a reference ground;

[0010] a planar radiation source, wherein the planar radiation source is arranged on one side of the reference ground and has a first feed point deviating from the physical center of the planar radiation source;

[0011] a pair of dual-coupled dipoles, wherein the dual-coupled dipoles are located on the same side of the reference ground as the planar radiation source, and the vertical projection of the dual-coupled dipoles on the reference ground intersects the vertical projection of the planar radiation source on the reference ground, wherein the planar radiation source has a polarization direction along the line connecting the first feed point to the physical center point of the planar radiation source, and the polarization direction of the planar radiation source and the polarization direction of the dual-coupled dipoles are in a spatially orthogonal state; and

[0012] An auxiliary vibrator, wherein a spherical initial medium space is defined with a physical center point of the planar radiation source as a spherical center and with λ / 2 as a radius, the initial medium space is a range of an initial electric field formed by the high-gain dual-antenna microwave detection device with the origin as a zero potential point, and a near-field medium space is defined within an error range of ±λ / 4 with λ / 2 as an inner radius and with 3λ / 2 as an outer radius, the near-field medium space is a radiation near-field range formed by the high-gain dual-antenna microwave detection device based on electromagnetic conversion of the initial electric field, wherein λ is a wavelength parameter corresponding to a frequency parameter of the high-gain dual-antenna microwave detection device, wherein the auxiliary vibrator is wholly or partially disposed in the near-field medium space around the directional radiation direction of the high-gain dual-antenna microwave detection device and has at least one metal layer around the directional radiation direction of the high-gain dual-antenna microwave detection device, so as to be adapted to be coupled with the electromagnetic field in the near-field medium space in a state that the high-gain dual-antenna microwave detection device is fed, and to improve the gain of the high-gain dual-antenna microwave detection device.

[0013] In an embodiment, wherein a pair of the dual-coupled dipole includes a first radiation source dipole and a second radiation source dipole, wherein the first radiation source dipole has a first feeding end, the second radiation source dipole has a second feeding end, the first radiation source dipole is disposed as a conductor extending with the first feeding end as an end, wherein the second radiation source dipole is disposed as a conductor extending with the second feeding end as an end, wherein the first radiation source dipole and the second radiation source dipole respectively have a line length greater than or equal to λ / 16 from the first feeding end and the second feeding end, the second feeding end and the first feeding end are close to each other and satisfy that a distance between the second feeding end and the first feeding end is less than or equal to λ / 4, and satisfy that distances between the first feeding end and the second feeding end and the reference ground satisfy greater than or equal to λ / 32, wherein the dual-coupled dipole has a polarization direction in a direction of a line connecting the first feeding end to the second feeding end, wherein the high-gain dual-antenna microwave detection device is fed in transmission at the first feeding point, so that the planar radiation source and the reference ground are used as a transmission antenna, and is fed in reception at the first feeding end, so that the dual-coupled dipole and the reference ground are used as a reception antenna.

[0014] In an embodiment, wherein the pair of the dual-coupled dipoles comprises a first radiating source dipole and a second radiating source dipole, wherein the first radiating source dipole has a first feeding end, the second radiating source dipole has a second feeding end, the first radiating source dipole is arranged as a conductor extending from the first feeding end, the second radiating source dipole is arranged as a conductor extending from the second feeding end, the first radiating source dipole and the second radiating source dipole have a line length from the first feeding end and the second feeding end respectively, the line length is greater than or equal to λ / 16, the second feeding end and the first feeding end are close to each other, the distance between the second feeding end and the first feeding end is less than or equal to λ / 4, the distance between the first feeding end and the second feeding end and the reference ground satisfies greater than or equal to λ / 32, the dual-coupled dipoles have a polarization direction along the line connecting the first feeding end to the second feeding end, the high-gain dual-antenna microwave detection device feeds the first feeding point and the first feeding end with signals having a phase difference of 90° respectively.

[0015] In an embodiment, wherein the distance between the first feeding end and the reference ground is greater than the distance between the other end of the first radiating source dipole and the reference ground, the distance between the second feeding end and the reference ground is greater than the distance between the other end of the second radiating source dipole and the reference ground.

[0016] In an embodiment, wherein the pair of the dual-coupled dipoles further comprises a first feeding line extending from the first feeding end to the reference ground, and a second feeding line extending from the second feeding end to the reference ground, wherein the planar radiating source is provided with two isolation holes, the first feeding line and the second feeding line pass through the planar radiating source from the corresponding isolation holes to isolate the planar radiating source.

[0017] In an embodiment, wherein the second feeding line is electrically connected to the reference ground.

[0018] In an embodiment, wherein the planar radiating source is grounded at its physical center point.

[0019] In an embodiment, wherein the planar radiating source has a plurality of grounding points arranged around its physical center point, the planar radiating source is grounded at the grounding points.

[0020] In an embodiment, wherein the high-gain dual-antenna microwave detection device comprises a circuit substrate, wherein the planar radiating source is carried on the circuit substrate, the pair of the dual-coupled dipoles is erected on the circuit substrate via the first feeding line and the second feeding line, the auxiliary oscillator is mounted on the circuit substrate, and the reference ground is arranged on the circuit substrate.

[0021] In one embodiment, wherein the high-gain dual-antenna microwave detection device comprises an antenna substrate and a circuit substrate, wherein the pair of dual-coupled dipoles are carried in the form of a strip conductor on the antenna substrate, wherein the planar radiation source is carried on the circuit substrate, wherein the antenna substrate is mounted on the circuit substrate in a state that an end of the first feed line opposite to the first feed end faces the circuit substrate, wherein the auxiliary oscillator is mounted on the circuit substrate, wherein the reference ground is provided on the circuit substrate.

[0022] Further purposes and advantages of the present application will be fully understood from the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0024] Figure 2 Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0025] Figure 3 Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0026] Figure 4 Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0027] Figure 5 Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0028] Figure 6A Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0029] Figure 6B Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0030] Figure 6C Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0031] Figure 6D Structure diagram of a high-gain dual-antenna microwave detection device according to one embodiment of the present application.

[0032] Figure 6E An optional schematic view of the planar radiation source of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0033] Figure 7 A partial structural schematic view of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application. DETAILED DESCRIPTION

[0034] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application, and other obvious modifications can be made by those skilled in the art. The basic principles defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0035] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0036] It can 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 one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0037] With reference to the drawings of the specification of the present application Figure 1 , a high-gain dual-antenna microwave detection device 100 is shown, wherein the high-gain dual-antenna microwave detection device 100 can increase the radiation distance in the directional radiation direction to meet the high installation application scenario, and correspondingly the high-gain dual-antenna microwave detection device 100 can have a longer detection distance in the side-mounted application scenario, so as to realize the high installation and long distance detection application of microwave detection.

[0038] Specifically, the high-gain dual-antenna microwave detection device 100 includes a planar radiation source 10, a pair of dual-coupled dipoles 20, a reference ground 30, and an auxiliary vibrator 40. The planar radiation source 10 is arranged on one side of the reference ground 30 and has a first feed point 11 offset from the physical center of the planar radiation source 10. The pair of dual-coupled dipoles 20 includes a first radiation source dipole 21 and a second radiation source dipole 22. The first radiation source dipole 21 has a first feed end 211, and the second radiation source dipole 22 has a second feed end 221. The first radiation source dipole 21 is arranged as a conductor extending from the first feed end 211, and the second radiation source dipole 22 is arranged as a conductor extending from the second feed end 221. The first radiation source dipole 21 and the second radiation source dipole 22 have a line length greater than or equal to λ / 16 from the first feed end 211 and the second feed end 221, respectively. The second feed end 221 and the first feed end 211 are close to each other and satisfy the distance between the second feed end 221 and the first feed end 211 being less than or equal to λ / 4. The distance between the first feed end 211 and the second feed end 221 and the reference ground 30 satisfies being greater than or equal to λ / 32. The dual-coupled dipoles 20 are located on the same side of the reference ground 30 as the planar radiation source 10, and the vertical projection of the dual-coupled dipoles 20 on the reference ground 30 intersects the vertical projection of the planar radiation source 10 on the reference ground 30. A spherical initial medium space is defined with the physical center of the planar radiation source 10 as the center and λ / 2 as the radius. The initial medium space is the range of the initial electric field formed by the high-gain dual-antenna microwave detection device 100 with the origin as the zero potential point. A near-field medium space is defined with λ / 2 as the inner radius and 3λ / 2 as the outer radius within an error range of ±λ / 4. The near-field medium space is the radiation near-field range formed by the high-gain dual-antenna microwave detection device 100 based on the electromagnetic conversion of the initial electric field. λ is the wavelength parameter corresponding to the frequency parameter of the high-gain dual-antenna microwave detection device 100. The auxiliary vibrator 40 is arranged in the near-field medium space around the directional radiation direction of the high-gain dual-antenna microwave detection device 100 in whole or in part and has at least one metal layer around the directional radiation direction of the high-gain dual-antenna microwave detection device 100 to change the medium state of the near-field medium space, avoid energy loss of the initial electric field, and ensure normal radiation of the microwave beam. The energy distribution and direction of the near field are changed, and the energy density of the microwave beam formed by the high-gain dual-antenna microwave detection device 100 and the gain in the directional radiation direction are improved.

[0039] Further, the dual coupling dipole 20 further comprises a first feeding line 23 extending from the first feeding end 211 to the reference ground 30, and a second feeding line 24 extending from the second feeding end 221 to the reference ground 30, and the planar radiation source 10 is provided with two isolation holes 12, and the first feeding line 23 and the second feeding line 24 respectively pass through the planar radiation source 10 from the corresponding isolation holes 12 to be isolated from the planar radiation source 10.

[0040] It is worth mentioning that the distance between the first feeding end 211 and the reference ground 30 is greater than the distance between the other end of the first radiation source pole 21 and the reference ground 30, and the distance between the second feeding end 221 and the reference ground 30 is greater than the distance between the other end of the second radiation source pole 22 and the reference ground 30, so as to facilitate the formation of directional radiation based on the coupling between the ends of the first radiation source pole 21 and the second radiation source pole 22 with higher current density distribution and the reference ground 30, and under the premise of forming directional radiation, the maximum energy coupling between the ends of the first radiation source pole 21 and the second radiation source pole 22 is required to reduce the area requirement of the reference ground 30, and also based on the bending of the first radiation source pole 21 and the second radiation source pole 22, it is beneficial to the miniaturization of the high-gain dual-antenna microwave detection device 100.

[0041] It is worth mentioning that in this structure of the utility model, the auxiliary vibrator 40 is implemented as a ring shape, and preferably has a diameter of λ and a height greater than or equal to λ / 4 and less than or equal to λ / 2, wherein the auxiliary vibrator 40 can be made of metal material as a whole to form the metal layer. In some embodiments, the auxiliary vibrator 40 can also be made of non-metal material and the metal layer can be formed by electroplating / spraying process. In this embodiment of the utility model, the auxiliary vibrator 40 is implemented as an integral ring structure, wherein the ring formed by the auxiliary vibrator 40 can be an integral ring or a ring with a gap in the middle. In some embodiments, the auxiliary vibrator 40 with a diameter of λ can also be formed in a ring shape by surrounding a plurality of metal layers, that is, the number of metal layers is multiple, and the plurality of metal layers are arranged as a whole around the directional radiation direction of the high-gain dual-antenna microwave detection device 100 to form the auxiliary vibrator 40. In some embodiments, the auxiliary vibrator 40 can also be provided as a cylindrical structure with an opening, that is, the auxiliary vibrator 40 has a bottom plate in addition to the ring structure.

[0042] Further, on the basis of the above structure design, the high-gain dual-antenna microwave detection device 100 is preferably provided

[0043] Preferably, the polarization direction of the planar radiation source 10 is the direction of the line connecting the first feeding point 11 to the physical center point of the planar radiation source 10, the polarization direction of the dual-coupled dipole 20 is the direction of the line connecting the first feeding end 211 to the second feeding end 221, and the polarization direction of the planar radiation source 10 and the polarization direction of the dual-coupled dipole 20 are in a state of spatial orthogonality, so as to improve the isolation of the antennas formed by the planar radiation source 10 and the dual-coupled dipole 20 and the reference ground 30, respectively, thereby ensuring the detection accuracy and stability of the high-gain dual-antenna microwave detection device 100 when used for receiving and transmitting separate Doppler microwave detection. It can be understood that the polarization direction of the planar radiation source 10 and the polarization direction of the dual-coupled dipole 20 are in a state of spatial orthogonality, that is, the polarization direction of the planar radiation source 10 and the polarization direction of the dual-coupled dipole 20 are perpendicular to each other within an error range of ± 35°.

[0044] Reference Figure 3 As shown, the simulation results of the high-gain dual-antenna microwave detection device 100 under the above structure and feeding arrangement are shown, specifically, the radiation gain of the high-gain dual-antenna microwave detection device 100 in the directional radiation direction is more than 9.4dBi, and has a large beam angle, so that in the high installation use scenario, the high-gain dual-antenna microwave detection device 100 can simultaneously meet the use requirements of detection distance and detection coverage range and is suitable for high installation, and based on the high-gain characteristics of the high-gain dual-antenna microwave detection device 100, the high-gain dual-antenna microwave detection device 100 is also suitable for being used for side installation to cover a longer detection distance.

[0045] It is also worth mentioning that, in some embodiments of the present application, the high-gain dual-antenna microwave detection device 100 can also be used as a circularly polarized antenna based on phase difference feeding of the first feeding point 11 and the first feeding end 211, specifically, the planar radiation source 10 and the dual-coupled dipole 20 are fed by signals with a phase difference of 90° at the first feeding point 11 and the first feeding end 211, respectively, to form circular polarization.

[0046] In addition, it is also worth mentioning that, in some embodiments of the present application, the planar radiation source 10 and the reference ground 30 can be used as a receiving antenna based on receiving feeding of the first feeding point 11, and the dual-coupled dipole 20 and the reference ground 30 can be used as a transmitting antenna based on transmitting feeding of the first feeding end 211, which is not limited by the present application.

[0047] Further, the high-gain dual-antenna microwave detection device 100 comprises a circuit substrate 50, the planar radiation source 10 is carried on the circuit substrate 50, the dual-coupled dipole 20 is erected on the circuit substrate 50 through the first feeding line 23 and the second feeding line 24, and the auxiliary vibrator 40 is mounted on the circuit substrate 50, wherein the reference ground 30 is arranged on the circuit substrate 50, and the auxiliary vibrator 40 is mounted on the circuit substrate 50 in a clamping, welding or other manner.

[0048] It is worth mentioning that the planar radiation source 10 and the reference ground 30 can be carried on two opposite surfaces of the circuit substrate 50, and the circuit substrate 50 can also be implemented as a pressboard, and the reference ground 30 is arranged in the middle layer of the circuit substrate 50 in the form of a pressboard, which is not limited in the utility model.

[0049] Further, referring to FIG. 1, Figure 2 Further, referring to FIG. 1,

[0050] It is worth mentioning that the feeding of the first feeding point 11 of the planar radiation source 10 can be probe feeding, microstrip feeding, edge feeding, corner feeding or the like, which is not limited in the utility model.

[0051] Further, referring to FIG. 1, Figure 4 Further, referring to FIG. 1, the planar radiation source 10 is arranged with a grounding point 12 at the physical center point of the planar radiation source 10, the grounding point 12 is electrically connected to the reference ground 30 at the physical center point of the planar radiation source 10 in a connection structure of a metalized via, is grounded, reduces the impedance of the planar radiation source 10, and is conducive to maintaining the current density distribution of the planar radiation source 10 when the first feeding point 11 is fed, thereby facilitating to ensure the radiation gain.

[0052] It is worth mentioning that in some embodiments, the second feed line 24 can also be electrically connected to the reference ground 30 in the state of being grounded at the second feed end 221.

[0053] Further referring to Figure 5 shown, the planar radiation source 10 can also be equivalent to its physical center point being grounded based on multiple grounding points 12 around its physical center point. It can be understood that in some embodiments, on the basis of the structure that the physical center point of the planar radiation source 10 is provided with the grounding point 12, multiple grounding points 12 around its physical center point can also be further provided.

[0054] It is worth mentioning that the specific form of the planar radiation source 10 does not constitute a limitation on the utility model, which can be a rectangular sheet structure as shown in the structure diagram of the utility model, or a metal layer of other shapes, for specific reference Figures 6A to 6E shown, some optional forms of the planar radiation source 10 are shown, and it can be understood that in specific implementation, the planar radiation source 10 can also be implemented in forms other than those disclosed in the utility model.

[0055] In particular, in some embodiments of the utility model, referring to Figure 7 shown, the planar radiation source 10 further includes a third feed point 13 deviating from its physical center point, wherein the high-gain double-antenna microwave detection device 100 feeds the first feed point 11 and the third feed point 13 with differential signals with a phase difference of 180°, respectively, and the line connecting the first feed point 11 and the third feed point passes through the physical center point of the planar radiation source 10.

[0056] It can be understood that in some embodiments of the utility model, the high-gain double-antenna microwave detection device 100 can also be provided to feed the first feed end 211 and the second feed end 221 with differential signals with a phase difference of 180°, respectively.

[0057] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0058] The person skilled in the art will understand that the embodiments of the present application shown in the above description and the accompanying drawings are only as examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structural principle of the present application has been shown and described in the embodiments, and the implementation of the present application can be any modification or modification without departing from the described principle.

Claims

1. A high-gain dual-antenna microwave detection device, characterized in that, include: One reference ground; A planar radiation source, wherein the planar radiation source is disposed on one side of the reference ground and has a first feed point offset from the physical center of the planar radiation source; A pair of dual-coupled poles, wherein the dual-coupled poles and the planar radiation source are located on the same side of the reference ground, and the vertical projection of the dual-coupled poles on the reference ground intersects the vertical projection of the planar radiation source on the reference ground, wherein the planar radiation source takes the direction of the line connecting the first feed point to the physical center point of the planar radiation source as its polarization direction, and wherein the polarization direction of the planar radiation source and the polarization direction of the dual-coupled poles are spatially orthogonal. as well as An auxiliary oscillator is provided, wherein a spherical initial medium space is defined with the physical center point of the planar radiation source as the center and a radius of λ / 2. The initial medium space is the range of the initial electric field formed by the high-gain dual-antenna microwave detection device with the origin as the zero potential point. Within an error range of ±λ / 4, a near-field medium space is defined with an inner radius of λ / 2 and an outer radius of 3λ / 2. The near-field medium space is the radiation near-field range formed by the electromagnetic conversion of the high-gain dual-antenna microwave detection device based on the initial electric field. λ is a wavelength parameter corresponding to the frequency parameter of the high-gain dual-antenna microwave detection device. The auxiliary oscillator is wholly or partially disposed in the near-field medium space around the directional radiation direction of the high-gain dual-antenna microwave detection device and has at least one metal layer around the directional radiation direction of the high-gain dual-antenna microwave detection device.

2. The high-gain dual-antenna microwave detection device according to claim 1, wherein a pair of dual-coupled poles includes a first radiating pole and a second radiating pole, wherein the first radiating pole has a first feed terminal, the second radiating pole has a second feed terminal, the first radiating pole is configured as a conductor extending from the first feed terminal, wherein the second radiating pole is configured as a conductor extending from the second feed terminal, wherein the first radiating pole and the second radiating pole have a line length greater than or equal to λ / 16 from the first feed terminal and the second feed terminal, respectively, and the second feed terminal and the first feed terminal... The electrical terminals are close to each other and the distance between the second feed terminal and the first feed terminal is less than or equal to λ / 4, and the distance between the first feed terminal and the second feed terminal and the reference ground is greater than or equal to λ / 32. The dual-coupled pole is polarized in the direction of the line connecting the first feed terminal and the second feed terminal. The high-gain dual-antenna microwave detection device is transmitted and fed at the first feed point so that the planar radiation source and the reference ground are used as a transmitting antenna, and is received and fed at the first feed terminal so that the dual-coupled pole and the reference ground are used as a receiving antenna.

3. The high-gain dual-antenna microwave detection device according to claim 1, wherein a pair of dual-coupled poles includes a first radiating pole and a second radiating pole, wherein the first radiating pole has a first feed end, the second radiating pole has a second feed end, the first radiating pole is configured as a conductor extending from the first feed end, wherein the second radiating pole is configured as a conductor extending from the second feed end, wherein the first radiating pole and the second radiating pole have a line length greater than or equal to λ / 16 from the first feed end and the second feed end, respectively, the second feed end and the first feed end are close to each other and satisfy that the distance between the second feed end and the first feed end is less than or equal to λ / 4, and satisfy that the distance between the first feed end and the second feed end and the reference ground is greater than or equal to λ / 32, wherein the dual-coupled poles are polarized in the direction of the line connecting the first feed end to the second feed end, wherein the high-gain dual-antenna microwave detection device feeds the first feed point and the first feed end with signals 90° out of phase.

4. The high-gain dual-antenna microwave detection device according to claim 2 or 3, wherein the distance between the first feed terminal and the reference ground is greater than the distance between the other end of the first radiation source electrode and the reference ground, and the distance between the second feed terminal and the reference ground is greater than the distance between the other end of the second radiation source electrode and the reference ground.

5. The high-gain dual-antenna microwave detection device according to claim 4, wherein the dual-coupled pole further includes a first feed line extending from the first feed end toward the reference ground and a second feed line extending from the second feed end toward the reference ground, wherein the planar radiation source is provided with two isolation holes, and the first feed line and the second feed line pass through the planar radiation source from the corresponding isolation holes and are isolated from the planar radiation source.

6. The high-gain dual-antenna microwave detection device according to claim 5, wherein the second feed line is electrically connected to the reference ground.

7. The high-gain dual-antenna microwave detection device according to claim 5, wherein the planar radiation source is grounded at its physical center point.

8. The high-gain dual-antenna microwave detection device according to claim 5, wherein the planar radiation source has a plurality of grounding points arranged around its physical center point, and the planar radiation source is grounded at the grounding points.

9. The high-gain dual-antenna microwave detection device according to claim 5, wherein the high-gain dual-antenna microwave detection device includes a circuit board, wherein the planar radiation source is supported on the circuit board, the dual-coupled pole is mounted on the circuit board via the first feed line and the second feed line, the auxiliary vibrator is mounted on the circuit board, and wherein the reference ground is disposed on the circuit board.

10. The high-gain dual-antenna microwave detection device according to claim 5, wherein the high-gain dual-antenna microwave detection device comprises an antenna substrate and a circuit substrate, wherein the dual-coupled pole is carried on the antenna substrate in the form of a strip wire, wherein the planar radiation source is carried on the circuit substrate, wherein the antenna substrate is mounted on the circuit substrate with one end of the first feed wire opposite to the first feed terminal facing the circuit substrate, wherein the auxiliary vibrator is mounted on the circuit substrate, and wherein the reference ground is disposed on the circuit substrate.

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