High-gain orthogonal polarization microwave detection device

Abstract

The utility model provides a high-gain orthogonal polarization microwave detection device, which comprises a reference ground, a plane radiation source and an auxiliary oscillator, wherein the plane radiation source is arranged on one side of the reference ground and is provided with a first feeding point and a second feeding point which are deviated from the physical center point of the plane radiation source and are orthogonal, and the physical center point of the plane radiation source is taken as a sphere center; a near-field medium space is defined in an error range of + / -lambda / 4 by taking lambda / 2 as an inner radius and taking 3 lambda / 2 as an outer radius, and the auxiliary oscillator is completely or partially arranged in the near-field medium space around a directional radiation direction of the high-gain orthogonal polarization microwave detection device; the high-gain orthogonal polarization microwave detection device is provided with at least one metal layer around the directional radiation direction of the high-gain orthogonal polarization microwave detection device, and the high-gain orthogonal polarization 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 orthogonal polarization microwave detection device. BACKGROUND

[0002] Microwave detection technology has unique advantages in behavior detection and existence detection technology as an important hub between people and things, and between things, which can form a detection area in a target space by emitting a microwave beam to the target space without invading privacy, and 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, then based on the Doppler effect principle, 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 application, and when applied to the detection of human activity, including the detection of human breathing and heartbeat activity, it can realize intelligent interconnection between people and things and has wide application prospect. The microwave detection antenna in the microwave detection technology is the basic hardware for emitting the microwave beam and / or receiving the reflected echo, and 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 is mainly columnar antenna and planar antenna, wherein the planar antenna is widely used because it has directional radiation capability. The radiation gain of the planar antenna in the industry can reach about 7dBi at most, and 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 must be improved to ensure sufficient detection distance, and the current improvement method usually compresses the planar beam angle of the radiation space as a trade-off, that is, the antenna gain is improved by concentrating electromagnetic radiation energy through the principle of beam synthesis, but at the same time the gain is improved, although the detection distance is increased, the planar beam angle of the antenna corresponding to the detection space is greatly reduced to about 30 degrees. In addition to requiring the radiation gain of the antenna to reach a certain level, the high installation use scenario also requires the beam angle of the antenna corresponding to the detection space to be large, 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. UTILITY MODEL CONTENTS

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

[0005] The utility model discloses a high gain quadrature polarization microwave detection device, wherein the high gain quadrature microwave detection device increases the radiation distance in the directional radiation direction and can have a farther detection distance in the side-mounted application scenario.

[0006] The utility model discloses a high gain quadrature polarization microwave detection device, wherein the high gain quadrature microwave detection device includes a plane radiation source, a reference ground and an auxiliary oscillator, the plane radiation source is arranged on one side of the reference ground and has a first feed point and a second feed point deviating from the physical center point of the plane radiation source, the line connecting the first feed point and the physical center point of the plane radiation source is perpendicular to the line connecting the second feed point and the physical center point of the plane radiation source within an error range of ± 35 °, the initial medium space is the range of the initial electric field formed by the high gain quadrature polarization microwave detection device with the origin as the zero potential point, and 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, the near-field medium space is the radiation near-field range formed by the electromagnetic conversion of the high gain quadrature polarization microwave detection device based on the initial electric field, λ is the wavelength parameter corresponding to the frequency parameter of the high gain quadrature polarization microwave detection device, the auxiliary oscillator is arranged in the near-field medium space around the directional radiation direction of the high gain quadrature polarization microwave detection device in whole or in part and has at least one metal layer around the directional radiation direction of the high gain quadrature polarization microwave detection device to change the medium state of the near-field medium space, avoid the energy loss of the initial electric field and ensure the normal radiation of the microwave beam, and the energy density of the microwave beam formed by the high gain quadrature polarization microwave detection device and the gain in the directional radiation direction are improved due to the change of the energy distribution and direction of the near field.

[0007] The utility model discloses a high gain quadrature polarization microwave detection device, wherein the high gain quadrature polarization microwave detection device is arranged to emit feed to the first feed point and receive feed to the second feed point, and based on the structural relationship that the line connecting the first feed point and the physical center point of the plane radiation source is perpendicular to the line connecting the second feed point and the physical center point of the plane radiation source, the transceiving isolation degree of the high gain quadrature polarization microwave detection device is ensured, and the detection accuracy and stability of the high gain quadrature polarization microwave detection device used for the Doppler microwave detection of transceiving separation are ensured.

[0008] According to one aspect of the present application, the present application provides a high-gain orthogonal polarization microwave detection device, wherein the high-gain orthogonal polarization 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 and a second feed point deviating from a physical center point of the planar radiation source, wherein a line connecting the first feed point and the physical center point of the planar radiation source is perpendicular to a line connecting the second feed point and the physical center point of the planar radiation source within an error range of ±35°; and

[0011] an auxiliary vibrator, wherein an initial medium space in a spherical shape is defined with the 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 orthogonal polarization microwave detection device with the origin as a zero potential point, and a near-field medium space is defined with λ / 2 as an inner radius and with 3λ / 2 as an outer radius within an error range of ±λ / 4, the near-field medium space is a radiation near-field range formed by the high-gain orthogonal polarization 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 orthogonal polarization microwave detection device, wherein the auxiliary vibrator is arranged in the near-field medium space in whole or in part around a directional radiation direction of the high-gain orthogonal polarization microwave detection device, and has at least one metal layer around the directional radiation direction of the high-gain orthogonal polarization microwave detection device, so as to be adapted to be coupled with an electromagnetic field in the near-field medium space in a state that the high-gain orthogonal polarization microwave detection device is fed, and to improve the gain of the high-gain orthogonal polarization microwave detection device.

[0012] In an embodiment, the high-gain orthogonal polarization microwave detection device is transmitted at the first feed point and received at the second feed point.

[0013] In an embodiment, the high-gain orthogonal polarization microwave detection device feeds the first feed point and the second feed point with signals with a phase difference of 90°, respectively.

[0014] In an embodiment, the planar radiation source further comprises a third feed point deviating from the physical center point thereof, wherein a line connecting the third feed point and the physical center point of the planar radiation source is perpendicular to the line connecting the second feed point and the physical center point of the planar radiation source, and the high-gain orthogonal polarization microwave detection device feeds the first feed point and the third feed point with differential signals with a phase difference of 180°, respectively.

[0015] In one embodiment, the planar radiating source further comprises a fourth feed point offset from a physical center point of the planar radiating source, wherein a line connecting the first feed point and the physical center point of the planar radiating source is perpendicular to a line connecting the fourth feed point and the physical center point of the planar radiating source, and wherein the high-gain cross-polarized microwave sounding device accesses echo signals at the second feed point and the fourth feed point with a phase difference of 180°.

[0016] In one embodiment, the planar radiating source further comprises a fourth feed point offset from a physical center point of the planar radiating source, wherein a line connecting the first feed point and the physical center point of the planar radiating source is perpendicular to a line connecting the fourth feed point and the physical center point of the planar radiating source, and wherein the high-gain cross-polarized microwave sounding device accesses echo signals at the second feed point and the fourth feed point with a phase difference of 180°.

[0017] In one embodiment, the planar radiating source is grounded at a physical center point thereof.

[0018] In one embodiment, the planar radiating source has a plurality of grounding points arranged around a physical center point thereof, and the planar radiating source is grounded at the grounding points.

[0019] In one embodiment, the high-gain cross-polarized microwave sounding device comprises an antenna substrate and a circuit substrate, wherein the planar radiating source is carried on the antenna substrate, wherein the antenna substrate is mounted on the circuit substrate, wherein the auxiliary oscillator is mounted on the circuit substrate, and wherein the reference ground plane is carried on another side of the antenna substrate and / or the circuit substrate.

[0020] In one embodiment, the high-gain cross-polarized microwave sounding device comprises a circuit substrate, wherein the planar radiating source is carried on the circuit substrate, wherein the auxiliary oscillator is mounted on the circuit substrate, and wherein the reference ground plane is arranged on the circuit substrate.

[0021] Further objects and advantages of the present application will be more fully understood from the following description of the present application taken in connection with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A schematic diagram of an implementable structure of a high-gain cross-polarized microwave sounding device according to one embodiment of the present application.

[0023] Figure 2 A schematic diagram of an implementable structure of the high-gain cross-polarized microwave sounding device according to the above embodiment of the present application.

[0024] Figure 3The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0025] Figure 4 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0026] Figure 5 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0027] Figure 6 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0028] Figure 7 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0029] Figure 8 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0030] Figure 9 The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0031] Figure 10A The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0032] Figure 10B The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0033] Figure 10C The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0034] Figure 10D The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model.

[0035] Figure 10E The simulation schematic view of the high-gain orthogonal polarization microwave detection device according to the above embodiment of the utility model. DETAILED DESCRIPTION

[0036] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only used as examples, and other obvious modifications can be thought 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.

[0037] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element 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.

[0038] 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.

[0039] With reference to the description of the drawings of the present application Figure 1 The high-gain orthogonal polarization microwave detection device 100 provided by the present application is shown schematically, wherein the high-gain orthogonal polarization microwave detection device 100 can increase the radiation distance in the directional radiation direction to meet the application scene of high installation, and correspondingly the high-gain orthogonal polarization microwave detection device 100 can have a longer detection distance in the side-mounted application scene.

[0040] Specifically, the high-gain orthogonal microwave detection device 100 includes a planar radiation source 10, a reference ground 20, and an auxiliary vibrator 30. The planar radiation source 10 is arranged on one side of the reference ground 20 and has a first feed point 11 and a second feed point 12 deviating from the physical center point of the planar radiation source 10. The line connecting the first feed point 11 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10 within an error range of ±35°. A spherical initial medium space is defined with the physical center point of the planar radiation source 10 as the spherical center and λ / 2 as the radius. The initial medium space is the range of the initial electric field formed by the high-gain orthogonal polarization 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. The near-field medium space is the radiation near-field range formed by the electromagnetic conversion of the high-gain orthogonal polarization microwave detection device 100 based on the initial electric field. λ is the wavelength parameter corresponding to the frequency parameter of the high-gain orthogonal polarization microwave detection device 100. The auxiliary vibrator 30 is arranged in the near-field medium space in whole or in part around the directional radiation direction of the high-gain orthogonal polarization microwave detection device 100 and has at least one metal layer around the directional radiation direction of the high-gain orthogonal polarization 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. 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 orthogonal polarization microwave detection device 100 and the gain in the directional radiation direction are improved

[0041] It is worth mentioning that in the structure of the utility model, the auxiliary vibrator 30 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 30 can be made of metal material as a whole to form the metal layer. In some embodiments, the auxiliary vibrator 30 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 30 is implemented as an integral ring structure, wherein the ring formed by the auxiliary vibrator 30 can be an integral ring or a ring with a gap in the middle. In some embodiments, the auxiliary vibrator 30 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 around the directional radiation direction of the high-gain orthogonal polarization microwave detection device 100 to form the auxiliary vibrator 30. In some embodiments, the auxiliary vibrator 30 can also be arranged as a cylindrical structure with an opening, that is, the auxiliary vibrator 30 has a bottom plate in addition to the ring structure.

[0042] Further, in the structure of the utility model, the high-gain orthogonal polarization microwave detection device 100 further comprises an antenna substrate 40 and a circuit substrate 50, wherein the planar radiation source 10 is carried on one side of the antenna substrate 40, wherein the antenna substrate 40 is mounted on the circuit substrate 50, wherein the auxiliary vibrator 30 is mounted on the circuit substrate 50, and in particular in this structure, the antenna substrate 40 is attached to the circuit substrate 50, and the auxiliary vibrator 30 is mounted on the circuit substrate 50 by clamping, welding or the like, wherein the reference ground 20 is carried on the other side of the antenna substrate 40, and the side of the circuit substrate 50 facing the antenna substrate 40 is also a metal side and can be used as the reference ground 20, that is, the reference ground 20 is carried on the other side of the antenna substrate 40 and the circuit substrate 50. It can be understood that in some embodiments, the reference ground 30 can also be arranged only on the other side of the antenna substrate 40 or the circuit substrate 50.

[0043] Reference Figure 2 As shown, the antenna substrate 40 is fixed to the circuit substrate 50 by welding, wherein the edge of the antenna substrate 40 is provided with a plurality of welding grooves 41, and the antenna substrate 40 is fixed to the circuit substrate 50 based on the welding grooves 41. In other words, the antenna substrate 40 can be fixed to the circuit substrate 50 in various ways, and the utility model does not limit this.

[0044] Further, based on the above structural design, the high-gain orthogonal polarization microwave detection device 100 is arranged to transmit and feed the first feeding point 11 and receive and feed the second feeding point 12, and based on the structural relationship that the line connecting the first feeding point 11 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feeding point 12 and the physical center point of the planar radiation source 10, the transceiving isolation of the high-gain orthogonal polarization microwave detection device 100 is ensured, and the detection accuracy and stability of the high-gain orthogonal polarization microwave detection device 100 when used for transceiving separation Doppler microwave detection are ensured.

[0045] Reference Figure 3 As shown in the simulation structure of the high-gain orthogonal polarization microwave detection device 100 under the above structure and feeding arrangement, specifically, the radiation gain of the high-gain orthogonal polarization microwave detection device 100 in the directional radiation direction is close to 9.8dBi, and has a large beam angle, so that in the high installation use scenario, the high-gain orthogonal polarization 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 characteristic of the high-gain orthogonal polarization microwave detection device 100, the high-gain orthogonal polarization microwave detection device 100 is also suitable for side installation to cover a longer detection distance.

[0046] It is also worth mentioning that in some embodiments of the present application, the high-gain orthogonal polarization microwave detection device 100 can also be used as a circular polarization antenna based on the phase difference feeding of the first feeding point 11 and the second feeding point 12, specifically, the high-gain orthogonal polarization microwave detection device 100 feeds the planar radiation source 10 with a signal phase difference of 90° at the first feeding point 11 and the second feeding point 12 respectively to form circular polarization.

[0047] Further, reference Figure 4 As shown in the simulation structure of the high-gain orthogonal polarization microwave detection device 100 under the above structure and feeding arrangement, specifically, the radiation gain of the high-gain orthogonal polarization microwave detection device 100 in the directional radiation direction is close to 9.8dBi, and has a large beam angle, so that in the high installation use scenario, the high-gain orthogonal polarization 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 characteristic of the high-gain orthogonal polarization microwave detection device 100, the high-gain orthogonal polarization microwave detection device 100 is also suitable for side installation to cover a longer detection distance.

[0048] It is also worth mentioning that in some embodiments of the present application, the high-gain orthogonal polarization microwave detection device 100 can also be used as a circular polarization antenna based on the phase difference feeding of the first feeding point 11 and the second feeding point 12, specifically, the high-gain orthogonal polarization microwave detection device 100 feeds the planar radiation source 10 with a signal phase difference of 90° at the first feeding point 11 and the second feeding point 12 respectively to form circular polarization.

[0049] Further, reference Figure 5As shown in FIG. 1 1, the planar radiation source 10 further comprises a third feed point 13 deviated from the physical center point of the planar radiation source 10, wherein the line connecting the third feed point 13 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10, wherein the high-gain orthogonally polarized microwave detection device 100 feeds the first feed point 1 1 and the third feed point 13 with differential signals with a phase difference of 180°.

[0050] Further referring to FIG. 1 1, Figure 6 As shown in FIG. 1 1, the planar radiation source 10 further comprises a third feed point 13 deviated from the physical center point of the planar radiation source 10, wherein the line connecting the third feed point 13 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10, wherein the high-gain orthogonally polarized microwave detection device 100 feeds the first feed point 1 1 and the third feed point 13 with differential signals with a phase difference of 180°.

[0051] Further referring to FIG. 1 1, Figure 7 As shown in FIG. 1 1, the planar radiation source 10 further comprises a third feed point 13 deviated from the physical center point of the planar radiation source 10, wherein the line connecting the third feed point 13 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10, wherein the high-gain orthogonally polarized microwave detection device 100 feeds the first feed point 1 1 and the third feed point 13 with differential signals with a phase difference of 180°.

[0052] Further referring to FIG. 1 1, Figure 8 As shown in FIG. 1 1, the planar radiation source 10 further comprises a third feed point 13 deviated from the physical center point of the planar radiation source 10, wherein the line connecting the third feed point 13 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10, wherein the high-gain orthogonally polarized microwave detection device 100 feeds the first feed point 1 1 and the third feed point 13 with differential signals with a phase difference of 180°.

[0053] Further referring to FIG. 1 1, Figure 9 As shown in FIG. 1 1, the planar radiation source 10 further comprises a third feed point 13 deviated from the physical center point of the planar radiation source 10, wherein the line connecting the third feed point 13 and the physical center point of the planar radiation source 10 is perpendicular to the line connecting the second feed point 12 and the physical center point of the planar radiation source 10, wherein the high-gain orthogonally polarized microwave detection device 100 feeds the first feed point 1 1 and the third feed point 13 with differential signals with a phase difference of 180°.

[0054] It is worth mentioning that the specific form of the plane radiation source 10 does not constitute a limitation of 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, and the specific reference is made to the drawings of the utility model Figures 10A to 10E As shown in the drawings, some optional forms of the plane radiation source 10 are shown, and it can be understood that in the specific implementation, the plane radiation source 10 can also be implemented in forms other than those disclosed in the utility model.

[0055] 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 conjunction 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 suitable manner in any one or more embodiments or examples. 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.

[0056] The skilled in the art should understand that the embodiments of the utility model shown in the above description and drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model has been shown and explained in the embodiments, and the implementation of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A high-gain cross-polarized microwave sounding device, characterized in that, The high-gain cross-polarized 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 feeding point and a second feeding point deviating from a physical center point of the planar radiation source, and a line connecting the first feeding point and the physical center point of the planar radiation source is perpendicular to a line connecting the second feeding point and the physical center point of the planar radiation source within an error range of ±35°; and an auxiliary vibrator, wherein a spherical initial medium space is defined with the physical center point of the planar radiation source as a spherical center and λ / 2 as a radius, the initial medium space is a range of an initial electric field formed by the high-gain cross-polarized microwave detection device with the origin as a zero potential point, and a near-field medium space is defined with λ / 2 as an inner radius and 3λ / 2 as an outer radius within an error range of ±λ / 4, the near-field medium space is a radiation near-field range formed by electromagnetic conversion of the high-gain cross-polarized microwave detection device based on the initial electric field, wherein λ is a wavelength parameter corresponding to a frequency parameter of the high-gain cross-polarized microwave detection device, the auxiliary vibrator is arranged in the near-field medium space in whole or in part around a directional radiation direction of the high-gain cross-polarized microwave detection device, and has at least one metal layer around the directional radiation direction of the high-gain cross-polarized microwave detection device.

2. The high-gain cross-polarized microwave detection device according to claim 1, wherein the high-gain cross-polarized microwave detection device is fed with a transmitting signal at the first feeding point and a receiving signal at the second feeding point.

3. The high-gain cross-polarized microwave detection device according to claim 1, wherein the high-gain cross-polarized microwave detection device feeds the first feeding point and the second feeding point with signals having a phase difference of 90°, respectively.

4. The high-gain cross-polarized microwave detection device according to claim 2, wherein the planar radiation source further comprises a third feeding point deviating from the physical center point thereof, and a line connecting the third feeding point and the physical center point of the planar radiation source is perpendicular to the line connecting the second feeding point and the physical center point of the planar radiation source, and the high-gain cross-polarized microwave detection device feeds the first feeding point and the third feeding point with differential signals having a phase difference of 180°, respectively.

5. The high-gain cross-polarized microwave detection device according to claim 2, wherein the planar radiation source further comprises a fourth feeding point deviating from the physical center point thereof, and the line connecting the first feeding point and the physical center point of the planar radiation source is perpendicular to the line connecting the fourth feeding point and the physical center point of the planar radiation source, and the high-gain cross-polarized microwave detection device accesses echo signals having a phase difference of 180° at the second feeding point and the fourth feeding point.

6. The high-gain cross-polarized microwave sounding device of claim 4, wherein the planar radiating source further comprises a fourth feed point offset from the physical center point thereof, wherein a line connecting the first feed point and the physical center point of the planar radiating source is perpendicular to a line connecting the fourth feed point and the physical center point of the planar radiating source, and wherein the high-gain cross-polarized microwave sounding device accesses echo signals at the second feed point and the fourth feed point with a phase difference of 180°.

7. The high-gain cross-polarized microwave sounding device of claim 1, wherein the planar radiating source is grounded at the physical center point thereof.

8. The high-gain cross-polarized microwave sounding device of claim 1, wherein the planar radiating source has a plurality of grounding points disposed about the physical center point thereof, and wherein the planar radiating source is grounded at the grounding points.

9. The high-gain cross-polarized microwave sounding device of claim 1, wherein the high-gain cross-polarized microwave sounding device comprises an antenna substrate and a circuit substrate, wherein the planar radiating source is carried by the antenna substrate, wherein the antenna substrate is mounted to the circuit substrate, wherein the auxiliary transducer is mounted to the circuit substrate, and wherein the reference ground plane is carried by another side of the antenna substrate and / or the circuit substrate.

10. The high-gain cross-polarized microwave sounding device of claim 1, wherein the high-gain cross-polarized microwave sounding device comprises a circuit substrate, wherein the planar radiating source is carried by the circuit substrate, wherein the auxiliary transducer is mounted to the circuit substrate, and wherein the reference ground plane is disposed on the circuit substrate.

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