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 planar radiation source, a half-wave oscillator and an auxiliary oscillator, and is characterized in that the planar radiation source and the half-wave oscillator are arranged on the same side of the reference ground; 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 in 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 improving the gain, and is suitable for high installation application.

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 high gain double antenna microwave detection device includes a reference ground, a plane radiation source, a half wave oscillator and an auxiliary oscillator, wherein the plane radiation source is arranged on one side of the reference ground and has a first feed point deviating from the physical center of the plane radiation source, wherein the half wave oscillator has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 wavelength, and has two ends close to each other within a distance range greater than or equal to lambda / 128 and less than or equal to lambda / 6, and the distance between the two ends and the reference ground is greater than or equal to lambda / 128, and the distance between at least one end and the plane radiation source is less than or equal to lambda / 6, wherein the half wave oscillator has a second feed point deviating from one end of the half wave oscillator, and the end is named as the feed end, and the distance between the feed end and the reference ground is less than or equal to the distance between the other end of the half wave oscillator and the reference ground, wherein the vertical projection of the plane radiation source on the reference ground intersects the vertical projection of the half wave oscillator on the reference ground, wherein the physical center point of the plane radiation source is taken as the center of a spherical initial medium space with a radius of lambda / 2, the initial medium space is the range of the initial electric field formed by the high gain double antenna microwave detection device with the origin as the zero potential point, and a near field medium space is defined within an error range of plus or minus lambda / 4 with an inner radius of lambda / 2 and an outer radius of 3 lambda / 2, and the near field medium space is the radiation near field range formed by the high gain double antenna microwave detection device based on the electromagnetic conversion of the initial electric field, wherein lambda is the wavelength parameter corresponding to the frequency parameter of the high gain double antenna microwave detection device, wherein the auxiliary oscillator is arranged in the near field medium space in whole or in part around the directional radiation direction of the high gain double antenna microwave detection device, wherein the auxiliary oscillator has at least one metal layer in the radial direction of the directional radiation direction of the high gain double antenna microwave detection device 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, and due to the change of the energy distribution and direction of the near field, the energy density of the microwave beam formed by the high gain double antenna microwave detection device and the gain in the directional radiation direction are improved.

[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 provided to emit 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 second feed point to make the half-wave oscillator and the reference ground serve as a receiving antenna, so as to reduce interference based on the lower radiation gain of the planar radiation source relative to the half-wave oscillator, and improve receiving sensitivity based on the high gain characteristic of the half-wave oscillator, so as to reduce the interference of the high gain double antenna microwave detection device while improving the sensitivity of the high gain double antenna microwave detection device.

[0008] Another purpose of the utility model lies in providing a high gain double antenna microwave detection device, wherein the planar radiation source has a polarization direction along the line from the first feed point to the physical center point of the planar radiation source, and the half-wave oscillator has a polarization direction from the second feed point along the half-wave oscillator away from the feed end, wherein the polarization direction of the planar radiation source and the polarization direction of the half-wave oscillator are in a spatially orthogonal state, so as to improve the isolation of the antennas formed by the planar radiation source and the half-wave oscillator 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 and receiving separated Doppler microwave detection.

[0009] According to an 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:

[0010] A reference ground;

[0011] 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;

[0012] A half-wave oscillator, wherein the vertical projection of the planar radiation source on the reference ground intersects the vertical projection of the half-wave oscillator on the reference ground, wherein the planar radiation source has a polarization direction along the line from the first feed point to the physical center point of the planar radiation source, and wherein the polarization direction of the planar radiation source and the polarization direction of the half-wave oscillator are in a spatially orthogonal state; and

[0013] An auxiliary vibrator, wherein a physical center point of the planar radiation source is taken as a spherical center, and a near-field medium space is defined within an error range of ±λ / 4 with an inner radius of λ / 2 and an outer radius of 3λ / 2, the near-field medium space being a radiation near-field range of the high-gain dual-antenna microwave detection device, 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 a 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 an electromagnetic field in the near-field medium space in a state where the high-gain dual-antenna microwave detection device is fed, and to improve the gain of the high-gain dual-antenna microwave detection device.

[0014] In an embodiment, wherein the half-wave vibrator has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 wavelength, and has two ends close to each other within a distance range greater than or equal to λ / 128 and less than or equal to λ / 6, and is spaced from the reference ground on a side where the planar radiation source is located with a distance greater than or equal to λ / 128 between the two ends and the reference ground, and a distance less than or equal to λ / 6 between at least one end and the reference ground, wherein the half-wave vibrator has a second feeding point, the second feeding point being deviated from one end of the half-wave vibrator, and the end is named as a feeding end, and a distance between the feeding end and the reference ground is less than or equal to a distance between the other end of the half-wave vibrator and the reference ground, wherein the half-wave vibrator is polarized from the second feeding point along the half-wave vibrator in a direction away from the feeding end, wherein the high-gain dual-antenna microwave detection device is fed at the first feeding point to use the planar radiation source and the reference ground as a transmitting antenna, and is fed at the second feeding point to use the half-wave vibrator and the reference ground as a receiving antenna.

[0015] In an embodiment, wherein said half-wave dipole has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 wavelength, and has two ends close to each other within a distance range greater than or equal to λ / 128 and less than or equal to λ / 6, and in a state that the distance between the two ends and said reference ground is greater than or equal to λ / 128, and wherein the distance between at least one end and said planar radiation source is less than or equal to λ / 6, is spaced apart from said reference ground on a side where said planar radiation source is located, wherein said half-wave dipole has a second feed point, said second feed point is deviated to one end of said half-wave dipole, corresponding to naming said end as a feed end, the distance between said feed end and said reference ground is less than or equal to the distance between the other end of said half-wave dipole and said reference ground, wherein said half-wave dipole is polarized in a direction from said second feed point along said half-wave dipole away from said feed end, wherein said high-gain dual-antenna microwave detection device feeds said first feed point and said second feed point with signals that are 90° out of phase, respectively.

[0016] In an embodiment, wherein said high-gain dual-antenna microwave detection device extends a feed line from said second feed point of said half-wave dipole in a direction towards said reference ground, wherein said feed line has an electrical length greater than or equal to 1 / 128 and less than or equal to 1 / 4 wavelength, wherein said planar radiation source is provided with an isolation hole, said feed line passes through said planar radiation source from said isolation hole to isolate said planar radiation source, wherein said second feed point is located at said feed end.

[0017] In an embodiment, wherein said high-gain dual-antenna microwave detection device extends a stub load from said half-wave dipole.

[0018] In an embodiment, wherein said high-gain dual-antenna microwave detection device further comprises a limiting support seat, wherein said limiting support seat comprises a base and a clamping limiting part and a half-wave dipole support column extending from said base in the same direction, wherein said clamping limiting part has a limiting hole, said clamping limiting part clamps said feed line in a state that said feed line passes through said limiting hole, wherein said half-wave dipole support column has two support channels, wherein in a state that said feed line is clamped by said clamping limiting part, said half-wave dipole is supported by said half-wave dipole support column in a state that it passes through both said support channels at the same time, so that in a state that said base is fixed, said limiting support seat forms support and fixation to said half-wave dipole.

[0019] In an embodiment, wherein said planar radiation source is grounded at its physical center point.

[0020] In an embodiment, wherein said planar radiation source has a plurality of grounding points arranged around its physical center point, said planar radiation source is grounded at said grounding points.

[0021] In an embodiment, wherein the high-gain dual-antenna microwave detection device comprises an antenna substrate and a circuit substrate, wherein the planar radiation source is carried on one side of the antenna substrate, the half-wave dipole is erected on the antenna substrate, the antenna substrate is attached to the circuit substrate, the auxiliary dipole is mounted on the circuit substrate, and the reference ground is carried on the other side of the antenna substrate and / or the circuit substrate.

[0022] In an embodiment, wherein the high-gain dual-antenna microwave detection device comprises a circuit substrate, wherein the planar radiation source is carried on the circuit substrate, the half-wave dipole is erected on the circuit substrate, the auxiliary dipole is mounted on the circuit substrate, and the reference ground is arranged on the circuit substrate.

[0023] Further purposes and advantages of the present application will be fully understood from the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Structure diagram of a high-gain dual-antenna microwave detection device according to an embodiment of the present application.

[0025] Figure 2 Optimized structure diagram of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0026] Figure 3 Simulation diagram of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0027] Figure 4 Structure diagram of a limiting support seat of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0028] Figure 5 Structure diagram of a deformation of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

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

[0030] Figure 7 Structure diagram of a deformation of a part of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0031] Figure 8A Structure diagram of an optional form of a planar radiation source of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0032] Figure 8B A schematic view of an optional form 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 8C A schematic view of an optional form of the planar radiation source of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0034] Figure 8D A schematic view of an optional form of the planar radiation source of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0035] Figure 8E A schematic view of an optional form of the planar radiation source of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0036] Figure 9 A schematic view of a partial structure deformation of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application.

[0037] Figure 10 A schematic view of a partial structure deformation of the high-gain dual-antenna microwave detection device according to the above embodiment of the present application. DETAILED DESCRIPTION

[0038] 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 of the present application can be applied to other embodiments, deformations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0039] 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.

[0040] 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.

[0041] With reference to the description of the utility model Figure 1 The high-gain double-antenna microwave detection device 100 provided by the utility model can increase the radiation distance in the directional radiation direction to meet the application scene of high installation, and can have a farther detection distance in the application scene of side installation, wherein the high-gain double-antenna microwave detection device 100 can achieve a detection distance greater than or equal to 15m in the application scene of high installation, and can achieve a detection distance greater than or equal to 30m in the application scene of side installation, thereby realizing the application of high installation and long-distance detection of microwave detection.

[0042] Specifically, the high-gain dual-antenna microwave detection device 100 includes a planar radiation source 10, a half-wave dipole 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 deviating from the physical center of the planar radiation source 10. The half-wave dipole 20 has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 of a wavelength, and has two ends close to each other within a distance range of greater than or equal to λ / 128 and less than or equal to λ / 6, and is spaced apart from the reference ground 30 on the side where the planar radiation source 10 is located in a state where the distance between the two ends and the reference ground 30 is greater than or equal to λ / 128, and the distance between at least one end and the planar radiation source 20 is less than or equal to λ / 6. The half-wave dipole 20 has a second feed point 21 deviating from one end of the half-wave dipole 20, which is named as the feed end, and the distance between the feed end and the reference ground 30 is less than or equal to the distance between the other end of the half-wave dipole 20 and the reference ground 30. The vertical projection of the planar radiation source 10 on the reference ground 30 intersects the vertical projection of the half-wave dipole 20 on the reference ground 30. A spherical initial medium space is defined with the physical center point of the planar radiation source 10 as the center and λ / 2 as the radius, and 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 within an error range of ±λ / 4 with λ / 2 as the inner radius and 3λ / 2 as the outer radius, and 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 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 to the initial electric field, and ensure normal radiation of the microwave beam. Due to the change of the energy distribution and direction of the near field, 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.

[0043] Furthermore, the high-gain dual-antenna microwave detection device 100 has a feed line 22 extending from the second feed point 21 of the half-wave dipole 20 in the direction toward the reference ground 30, wherein the feed line 22 has an electrical length greater than or equal to 1 / 128 and less than or equal to 1 / 4 of the wavelength, wherein the planar radiation source 10 is provided with an isolation hole 12, and the feed line 22 passes through the isolation hole 12 through the planar radiation source 10 and is isolated from the planar radiation source 10.

[0044] It is worth mentioning that in this structure of the present invention, where the second feed point 21 is located at the feed end, the feed line 22 extends from the feed end to the half-wave dipole 20. Specifically, the high-gain dual-antenna microwave detection device 100 further extends from the half-wave dipole 20 with a stub load 23. Through the design of the stub load of the half-wave dipole 20, the resonant frequency of the antenna formed by the half-wave dipole 20 and the reference ground 30 can be designed to match the corresponding operating frequency, thereby helping to ensure the anti-interference performance of the high-gain dual-antenna microwave detection device 100. Simultaneously, it is simple and easy to implement, which helps to ensure the consistency and reliability of the high-gain dual-antenna microwave detection device 100 in mass production.

[0045] Specifically, refer to Figure 2 and Figure 4 As shown, to further improve the structural stability of the high-gain dual-antenna microwave detection device 100, a limiting support 24 is further provided to support the half-wave dipole 20. The limiting support 24 includes a base 241, a clamping and limiting portion 242 extending from the base 241 in the same direction, and a half-wave dipole support column 243. The clamping and limiting portion 242 has a limiting hole 2421. The clamping and limiting portion 242 is positioned such that... The feed wire 22 is clamped in the state of passing through the limiting hole 2421. The half-wave oscillator support column 243 has two support channels 2431. When the feed wire 22 is clamped by the clamping and limiting part 242, the half-wave oscillator 20 is supported by the half-wave oscillator support column 243 in the state of passing through both support channels 2431 at the same time. Thus, when the base 241 is fixed, the limiting support seat 24 forms support and fixation for the half-wave oscillator 20.

[0046] It is worth mentioning that in the 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. The auxiliary vibrator 40 can be made of metal material as a whole, and the metal layer is formed. In some embodiments, the auxiliary vibrator 40 can also be made of non-metal material, and the metal layer is formed by electroplating / spraying process. In this embodiment of the utility model, the auxiliary vibrator 40 is implemented as an integral ring structure, and 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 multiple metal layers, that is, the number of metal layers is multiple, and the multiple metal layers are arranged to form the auxiliary vibrator 40 around the directional radiation direction of the high-gain dual-antenna microwave detection device 100. In some embodiments, the auxiliary vibrator 40 can also be arranged as a cylindrical structure with an opening, that is, the auxiliary vibrator 40 has a bottom plate based on the ring structure.

[0047] Further, based on the above structure design, the high-gain dual-antenna microwave detection device 100 is preferably arranged to transmit feed to the first feed point 11, so that the planar radiation source 10 and the reference ground 30 are used as a transmitting antenna, and to receive feed to the second feed point 21, so that the half-wave vibrator 20 and the reference ground 30 are used as a receiving antenna, thereby reducing interference based on the lower radiation gain of the planar radiation source 10 relative to the half-wave vibrator 20, and improving receiving sensitivity based on the high-gain characteristics of the half-wave vibrator 20, so as to reduce the interference of the high-gain dual-antenna microwave detection device 100 while improving the sensitivity of the high-gain dual-antenna microwave detection device 100.

[0048] Preferably, the polarization direction of the planar radiation source 10 is the direction of the line connecting the first feed point 11 to the physical center point of the planar radiation source 10, and the polarization direction of the half-wave dipole 20 is the direction from the second feed point 21 along the half-wave dipole 20 away from the feed end, wherein the polarization direction of the planar radiation source 10 and the polarization direction of the half-wave 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 half-wave dipole 20 with the reference ground 30 respectively, thereby guaranteeing the detection accuracy and stability of the high-gain dual-antenna microwave detection device 100 when used for transmitting and receiving separated Doppler microwave detection. It can be understood that the polarization direction of the planar radiation source 10 and the polarization direction of the half-wave dipole 20 are spatially orthogonal, that is, the polarization direction of the planar radiation source 10 and the polarization direction of the half-wave dipole 20 are perpendicular to each other within an error range of ±35°.

[0049] Reference Figure 3 As shown, the simulation results of the high-gain dual-antenna microwave detection device 100 under the above structure and feed arrangement are shown, specifically, the radiation gain of the high-gain dual-antenna microwave detection device 100 in the directional radiation direction is close to 10dBi, 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 to adapt to 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.

[0050] 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 feed point 11 and the second feed point 21, specifically, the planar radiation source 10 and the half-wave dipole 20 are fed by signals with a phase difference of 90° respectively at the first feed point 11 and the second feed point 21 to form circular polarization.

[0051] 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 feed point 11, and the half-wave dipole 20 and the reference ground 30 can be used as a transmitting antenna based on transmitting feeding of the second feed point 21, which is not limited by the present application.

[0052] Further, the high-gain dual-antenna microwave detection device 100 comprises an antenna substrate 50 and a circuit substrate 60, wherein the planar radiation source 10 is carried on one side of the antenna substrate 50, the half-wave dipole 20 is erected on the antenna substrate 50 on the same side of the planar radiation source 10, the antenna substrate 50 is attached to the circuit substrate 60, and the auxiliary dipole 40 is mounted on the circuit substrate 60 by clamping, welding or the like. In this structure, the reference ground 30 is carried on the other side of the antenna substrate 50, and the side of the circuit substrate 60 facing the antenna substrate 50 is also a metal side and can be used as the reference ground 30, that is, the reference ground 30 is carried on the other side of the antenna substrate 50 and the circuit substrate 60. It can be understood that in some embodiments, the reference ground 30 can also be provided only on the other side of the antenna substrate 50 or the circuit substrate 60.

[0053] Further, referring to Figure 5 In some variant structures, the antenna substrate 50 can also not be provided, and specifically, the circuit substrate 60 is a pressboard, the planar radiation source 10 is carried on one side of the circuit substrate 60, the half-wave dipole 20 is erected on the circuit substrate 60 on the same side of the planar radiation source 10, the reference ground 30 is provided in the middle layer of the circuit substrate 60 in the form of a pressboard, and the auxiliary dipole 40 is mounted on the circuit substrate 60 by clamping, welding or the like.

[0054] It is worth mentioning that the feed of the first feed point 11 of the planar radiation source 10 can be probe feed, microstrip feed, edge feed, corner feed, etc., and the present application does not limit this.

[0055] Further, referring to Figure 6 As shown, the planar radiation source 10 is provided with a grounding point 12 at its physical center point, the grounding point 12 is electrically connected to the reference ground 30 at the physical center point of the planar radiation source 10 by a metalized via connection structure, is grounded, reduces the impedance of the planar radiation source 10, and is beneficial to maintaining the current density distribution of the planar radiation source 10 when the first feed point 11 is fed, thereby being beneficial to guaranteeing the radiation gain.

[0056] It is worth mentioning that, referring to Figure 9As shown in the figure, the half-wave vibrator 20 can also be electrically connected to the reference ground 30 through a grounding wire 25, wherein the grounding wire 25 can be arranged in the same position as the planar radiation source 10 in the state of being electrically connected to the grounding point 12, or can be electrically connected to the reference ground 30 at other positions.

[0057] Further referring to Figure 7 As shown in the figure, the planar radiation source 10 can also be equivalent to being grounded at its physical center point based on a plurality of grounding points 12 around the physical center point. It can be understood that, in some embodiments, the structure of arranging the grounding point 12 at the physical center point of the planar radiation source 10 can also be further arranged with a plurality of grounding points 12 around the physical center point.

[0058] 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 Figure 8A to Figure 8E As shown in the figure, some optional forms of the planar radiation source 10 are shown, and it can be understood that the planar radiation source 10 can also be implemented in forms other than those disclosed in the utility model in specific implementation.

[0059] In particular, in some embodiments of the utility model, reference Figure 10 The planar radiation source 10 further comprises a third feeding point 13 deviating from the physical center point thereof, wherein the high-gain double-antenna microwave detection device 100 feeds the first feeding point 11 and the third feeding point 13 with differential signals with a phase difference of 180°, respectively, and the line connecting the first feeding point 11 and the third feeding point 13 passes through the physical center point of the planar radiation source 10.

[0060] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 utility model. 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 one or more embodiments or examples in a suitable manner. In addition, the 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 contradiction.

[0061] Those skilled in the art will understand that the embodiments of the present application described above and shown in the drawings are merely by way of example 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 have been demonstrated and explained in the embodiments, and the embodiments of the present application can have any deformation or modification without departing from the principle.

Claims

1. A high-gain dual-antenna microwave sounding device, characterized in that, The high-gain dual-antenna microwave detection device comprises: a reference ground; 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; a half-wave dipole, wherein the vertical projection of the planar radiation source on the reference ground intersects the vertical projection of the half-wave dipole 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 of the planar radiation source, and wherein the polarization direction of the planar radiation source and the polarization direction of the half-wave dipole are in a spatially orthogonal state; and an auxiliary dipole, wherein the physical center of the planar radiation source is taken as the center of a sphere, and a near-field medium space is defined within an error range of ±λ / 4 with an inner radius of λ / 2 and an outer radius of 3λ / 2, the near-field medium space being the radiation near-field range of the high-gain dual-antenna microwave detection device, wherein λ is the wavelength parameter corresponding to the frequency parameter of the high-gain dual-antenna microwave detection device, and wherein the auxiliary dipole is arranged in the near-field medium space around the directional radiation direction of the high-gain dual-antenna microwave detection device 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.

2. The high-gain dual-antenna microwave detection device according to claim 1, wherein the half-wave dipole has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 wavelength, and has two ends close to each other within a distance range greater than or equal to λ / 128 and less than or equal to λ / 6, and is spaced apart from the reference ground on the side where the planar radiation source is located by a distance greater than or equal to λ / 128, and wherein the distance between at least one end and the reference ground is less than or equal to λ / 6, wherein the half-wave dipole has a second feed point deviating from one end of the half-wave dipole, which is named as the feed end, and the distance between the feed end and the reference ground is less than or equal to the distance between the other end of the half-wave dipole and the reference ground, wherein the polarization direction of the half-wave dipole is along the half-wave dipole away from the feed end from the second feed point, wherein the high-gain dual-antenna microwave detection device is fed at the first feed point to use the planar radiation source and the reference ground as a transmitting antenna, and is fed at the second feed point to use the half-wave dipole and the reference ground as a receiving antenna. ​ 3. The high gain dual antenna microwave detecting device of claim 1, wherein the half-wave dipole has an electrical length greater than or equal to 1 / 2 and less than or equal to 3 / 4 wavelength, and has two ends close to each other within a distance range greater than or equal to λ / 128 and less than or equal to λ / 6, and is spaced apart from the reference ground on a side where the planar radiation source is located with a distance greater than or equal to λ / 128 between the two ends and the reference ground, and with a distance less than or equal to λ / 6 between at least one end and the planar radiation source, wherein the half-wave dipole has a second feed point, the second feed point is offset to one end of the half-wave dipole, the end is named as a feed end, the distance between the feed end and the reference ground is less than or equal to the distance between the other end of the half-wave dipole and the reference ground, wherein the half-wave dipole is polarized in a direction away from the feed end along the half-wave dipole from the second feed point, wherein the high gain dual antenna microwave detecting device feeds the first feed point and the second feed point with signals that are 90° out of phase.

4. The high gain dual antenna microwave detecting device of claim 2 or 3, wherein the high gain dual antenna microwave detecting device extends a feed line from the second feed point of the half-wave dipole in a direction towards the reference ground, wherein the feed line has an electrical length greater than or equal to 1 / 128 and less than or equal to 1 / 4 wavelength, wherein the planar radiation source is provided with an isolation hole, the feed line passes through the planar radiation source from the isolation hole to isolate the planar radiation source, wherein the second feed point is located at the feed end.

5. The high gain dual antenna microwave detecting device of claim 4, wherein the high gain dual antenna microwave detecting device extends a stub load from the half-wave dipole.

6. The high gain dual antenna microwave detecting device of claim 5, wherein the high gain dual antenna microwave detecting device further comprises a limiting support seat, wherein the limiting support seat comprises a base and a clamping limiting part and a half-wave dipole support column extending from the base in the same direction, wherein the clamping limiting part has a limiting hole, the clamping limiting part clamps the feed line with the feed line passing through the limiting hole, wherein the half-wave dipole support column has two support channels, wherein in a state that the feed line is clamped by the clamping limiting part, the half-wave dipole is supported by the half-wave dipole support column with both passing through the two support channels, so that in a state that the base is fixed, the limiting support seat forms support and fixation to the half-wave dipole.

7. The high gain dual antenna microwave detecting device of claim 6, wherein the planar radiation source is grounded at a physical center point thereof.

8. The high gain dual antenna microwave detecting device of claim 6, wherein the planar radiation source has a plurality of grounding points arranged around a physical center point thereof, and the planar radiation source is grounded at the grounding points.

9. The high-gain dual antenna microwave probe of claim 7, wherein the high-gain dual antenna microwave probe comprises an antenna substrate and a circuit substrate, wherein the planar radiating source is carried on a face of the antenna substrate, the half-wave dipole is mounted on the antenna substrate, wherein the antenna substrate is attached to the circuit substrate, wherein the auxiliary dipole is mounted on the circuit substrate, wherein the reference ground is carried on another face of the antenna substrate and / or the circuit substrate.

10. The high-gain dual antenna microwave probe of claim 7, wherein the high-gain dual antenna microwave probe comprises a circuit substrate, wherein the planar radiating source is carried on the circuit substrate, the half-wave dipole is mounted on the circuit substrate, the auxiliary dipole is mounted on the circuit substrate, wherein the reference ground is provided on the circuit substrate.

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