CN111478032A - Microwave detection module with long and narrow detection surface - Google Patents

Abstract

The invention discloses a microwave detection module with a long and narrow detection surface, wherein the microwave detection module with a long and narrow detection surface has a polarization direction and can form a radiation space compressed in the polarization direction, corresponding to the A target detection direction of a microwave detection module with a narrow and long detection surface, the radiation space has a narrow and long projection surface adjusted in the polarization direction on the corresponding target detection surface, so that the long and narrow detection surface The microwave detection module is suitable for the target detection space required by the narrow and long target detection surface, and at the same time, the adaptability of the microwave detection module with the narrow and long detection surface to the environment and the detection reliability of the corresponding target detection space are improved.

Description

Microwave detection module with narrow and long detection surface

technical field

The invention relates to the field of microwave detection, in particular to a microwave detection module with a long and narrow detection surface.

Background technique

As an important link between people and things and things and things, microwave detection technology has unique advantages in behavior detection and presence detection technology. It can detect moving objects without violating human privacy, so it has a wide range of applications. However, due to the lack of effective constraints and control methods for microwave beams, especially the shape adjustment methods of microwave beams, microwave detection technology has limited adaptability to different application scenarios in practical applications. Specifically, due to the lack of effective constraints and control means for the microwave beam, the actual detection space of the existing microwave detection technology is difficult to control, which makes it difficult for the existing microwave detection technology to adapt to the selection of different target detection spaces, and because the target The environmental interference of the actual detection space outside the detection space, including the action interference of the actual detection space other than the target detection space, electromagnetic interference, and self-excited interference caused by the electromagnetic shielding environment, at the same time cause the existing microwave detection technology to be used in different applications. The stability of the anti-interference ability of the scene is poor.

The existing microwave detection technology mainly adopts a microwave detection module with a columnar radiation source structure and a microwave detection module with a plane radiation source structure. Radiation dead zone, in actual use, such as in vertical detection applications, when the microwave detection module of the columnar radiation source structure is installed in vertical directions such as ceilings, ceilings and roofs for vertical downward detection, the columnar radiation source The installation position of the microwave detection module of the structure is usually lowered to reduce or avoid the radiation dead zone of the corresponding radiation space. The microwave detection module of the planar radiation source structure has larger side lobes, and the microwave detection module of the columnar radiation source structure is more susceptible to the action interference and self-excitation interference of the actual detection space outside the target detection space. That is to say, the detection distance of the microwave detection module of the existing columnar radiation source structure in actual use is much smaller than the detection distance matching its gain, and it has poor applicability compared with the microwave detection module of the planar radiation source structure Therefore, the existing microwave detection technology mostly adopts the microwave detection module of the planar radiation source structure.

Specifically, referring to FIGS. 1A and 1B of the accompanying drawings in the description of the present invention, the structure principle and the corresponding radiation pattern of the microwave detection module 10P of the existing planar radiation source structure are illustrated respectively, wherein the planar radiation source structure has The microwave detection module 10P includes a flat-plate radiation source 11P and a reference ground 12P, wherein the flat-plate radiation source 11P and the reference ground 12P are arranged at intervals in parallel to each other, and the projection of the flat-plate radiation source 11P on the reference ground 12P is located at the reference ground 12P. Within the ground 12P, a radiation gap 13P is formed between the flat radiation source 11P and the reference ground 12P, so that when the flat radiation source 11P is fed, the flat radiation source 11P can be coupled with the reference ground 12P to A radiation space 100P is formed from the radiation slot 13P with the axis perpendicular to the physical center point of the flat radiation source 11P as the central axis, wherein the radiation space 100P corresponds to the coverage of electromagnetic waves radiated by the microwave detection module 10P of the flat radiation source structure scope. In actual use, the direction from the reference ground 12P to the flat radiation source 11P is the detection direction of the microwave detection module 10P of the planar radiation source structure, which corresponds to the Z-axis direction of the radiation space 100P in the figure. It can be seen that the radiation space 100P In this direction, the projection surface of the corresponding target detection surface tends to be circular, that is, the microwave detection module 10P of the planar radiation source structure is suitable for the target detection space required by the circular target detection surface and the square target detection surface. The circular target detection surface and the square target detection surface require most of the target detection space, so the microwave detection module 10P of the planar radiation source structure has certain adaptability to the target detection space in practical applications. However, due to the lack of effective constraints and control means for the radiation space 100P, including the adjustment of the projection surface shape and detection distance of the radiation space 100P on the corresponding target detection surface, the microwave detection module 10P of the planar radiation source structure is difficult to adapt to more The choice of multiple target detection spaces, such as the target detection space where the target detection surface is a narrow and long aisle.

To sum up, due to the lack of effective constraints and control methods for microwave beams, the current microwave detection technology is only suitable for the target detection space required by the circular target detection surface and the square target detection surface, and it is difficult to stably adapt to different target detection spaces. s Choice. Therefore, obtaining an effective adjustment method for the shape of the radiation space of the corresponding microwave detection module is not only conducive to improving the adaptability of microwave detection technology to different application scenarios, but also conducive to improving the anti-interference ability and stability of microwave detection technology in corresponding application scenarios sex.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a microwave detection module with a long and narrow detection surface, wherein the microwave detection module with a long and narrow detection surface has a polarization direction and can form a radiation space compressed in the polarization direction, corresponding to In a target detection direction of the microwave detection module with a narrow and long detection surface, the radiation space has an elongated projection surface narrowed and adjusted in the polarization direction on the corresponding target detection surface, so that the The microwave detection module of the narrow and long detection surface is suitable for the target detection space required by the narrow and long target detection surface, and at the same time, the adaptability of the microwave detection module with the narrow and long detection surface to the environment and the detection reliability of the corresponding target detection space are improved.

Another object of the present invention is to provide a microwave detection module with an elongated detection surface, wherein the electric field coupling energy of the microwave detection module with an elongated detection surface is enhanced based on combining beams in the polarization direction and enhancing the microwave detection module with the elongated detection surface in a non-polarization direction According to the idea, the gain of the microwave detection module with the narrow and long detection surface is improved, and the state where the radiation space is compressed in the polarization direction is formed, wherein the non-polarization direction is perpendicular to the polarization direction and the direction of the target detection direction.

Another object of the present invention is to provide a microwave detection module with a narrow and long detection surface, wherein the gain of the microwave detection module with a narrow and long detection surface is improved, and the microwave detection module with a narrow and long detection surface is also suitable for longer distances. The target detection space required by the detection distance improves the adaptability of the microwave detection module with the narrow and long detection surface to the corresponding target detection space.

Another object of the present invention is to provide a microwave detection module with a narrow and long detection surface, wherein the radiation space has a narrow and elongated projection surface on the corresponding target detection surface that is narrowed and adjusted in the polarization direction, thereby reducing the required The radiation of the radiation space in a non-target detection space in the polarization direction is beneficial to prevent the microwave detection module with a narrow and long detection surface from being affected by the action interference and electromagnetic interference of the non-target detection space in the polarization direction. Interference, that is, the adaptability of the microwave detection module having the narrow and long detection surface to the corresponding non-target detection space is improved, and the detection reliability of the corresponding target detection space is improved.

Another object of the present invention is to provide a microwave detection module with a long and narrow detection surface, wherein based on balancing the distribution of electric field coupling energy of the microwave detection module with a long and narrow detection surface in the non-polarized direction, the radiation space The generation of a side lobe located in the non-target detection space and opposite to the target detection direction is suppressed, that is, the radiation space in the opposite direction of the target detection direction is reduced to the non-target detection direction. The radiation of the space is beneficial to avoid the action interference and electromagnetic interference of the non-target detection space in the reverse direction of the target detection direction, and further improves the microwave detection module with the narrow and long detection surface to the corresponding non-target detection space. Adaptability, and detection reliability of target detection space for narrow and long target detection surface requirements.

Another object of the present invention is to provide a microwave detection module with a long and narrow detection surface, wherein the generation of the side lobes in the radiation space located in the non-target detection space and opposite to the target detection direction is suppressed , which is beneficial to avoid the self-excited interference caused by the multiple reflections of the side lobes in the non-target detection space, and further improves the adaptability of the microwave detection module with the narrow and long detection surface to the corresponding non-target detection space, and The detection reliability of the target detection space required by the narrow and long target detection surface.

Another object of the present invention is to provide a microwave detection module with a narrow and long detection surface, wherein the microwave detection module with a narrow and long detection surface is suitable for a target detection space requiring a longer detection distance, so that the microwave detection module with a narrow and long detection surface The adaptability of the detection module to the corresponding target detection space is improved, and at the same time, the action interference, electromagnetic interference and self-excited interference of the non-target space can be suppressed, so that the microwave detection module with the narrow and long detection surface is suitable for the corresponding non-target detection space. The adaptability of the microwave detection module with the narrow and long detection surface is improved, and the adaptability of the microwave detection module with the long and narrow detection surface to the environment is improved, and it can be stably and reliably used in industrial production or storage places for microwave detection of the target detection space required by the narrow and long target detection surface. , which improves the applicability and reliability of the microwave detection module with a narrow and long detection surface.

Another object of the present invention is to provide a microwave detection module with an elongated detection surface, wherein the microwave detection module with an elongated detection surface includes a reference ground, a main radiation source and at least one auxiliary radiation source, wherein the main radiation The source and the auxiliary radiation source are respectively arranged equidistant from the reference ground, wherein the main radiation source has a feeding point deviated from its physical center point, then the feeding point of the main radiation source The direction of the connection line to the physical center point is the polarization direction, and the direction from the reference ground to the main radiation source is the target detection direction, wherein the auxiliary radiation source and the main radiation source are along the main radiation source. The connection between the physical center point of the source and the feeding point is arranged and electrically connected, so that when the main radiation originates from the feeding point and is fed, based on the main radiation source and the phase The distance between adjacent auxiliary radiation sources is set, and the number of auxiliary radiation sources is set and the distance between adjacent auxiliary radiation sources is set, and the radiation space is formed based on beam synthesis and has a position at the pole. The beam angle at which the orientation direction is compressed and adjusted.

Another object of the present invention is to provide a microwave detection module with a long and narrow detection surface, wherein the distance parameter D1 between the main radiation source and the adjacent auxiliary radiation source satisfies λ/8≤D1≤λ/2, Where λ is a wavelength parameter corresponding to the feed frequency, the radiation space is allowed to be formed based on beam synthesis and has a beam angle that is compressed and adjusted in the polarization direction according to the value of the parameter D1.

Another object of the present invention is to provide a microwave detection module with a long and narrow detection surface, wherein two opposite sides of the main radiation source that define the polarization direction are polarized sides, and define the direction of the main radiation source. The two opposite sides of the non-polarized direction are two non-polarized sides, wherein the two non-polarized sides of the main radiation source are concave toward the physical center point of the main radiation source and are concavely arranged, so When the main radiation originates from the feeding point and is fed, based on the two non-polarized edges of the main radiation source being concavely arranged, the potential distribution of the non-polarized edges is enhanced, corresponding to the enhanced The main radiation originates from the electric field coupling between the two non-polarized sides and the reference ground and the electric field coupling between the two ends of each of the non-polarized sides of the main radiation source, that is, in the non-polarized side The polarization direction enhances the electric field coupling energy of the microwave detection module with the narrow and long detection surface, thereby increasing the beam angle of the radiation space in the non-polarization direction, then in the target detection direction, the radiation space The corresponding target detection surface has an elongated projection surface which is narrowed and adjusted in the polarization direction.

Another object of the present invention is to provide a microwave detection module with a long and narrow detection surface, which is based on the concave arrangement of the two non-polarized sides of the main radiation source and the dimensions of the main radiation source and the reference ground Setting, the distance parameter D2 between the side of the reference ground corresponding to the non-polarized side of the main radiation source and the corresponding non-polarized side of the main radiation source satisfies D2≥λ/ 32. In this way, the distribution of the electric field coupling energy in the non-polarized direction of the microwave detection module with the long and narrow detection surface is balanced, and the electrical field between the two ends of each of the non-polarized sides of the main radiation source is reduced. The maximum electric field coupling strength is beneficial to balance the near-field radiation of the microwave detection module with the narrow and long detection surface, thereby suppressing the radiation space in the non-target detection space and opposite to the target detection direction. Generation of side lobes.

According to one aspect of the present invention, the present invention provides a microwave detection module with a long and narrow detection surface, wherein the microwave detection module with a narrow and long detection surface includes:

a place of reference;

a main radiation source, wherein the main radiation source has a feeding point, wherein the feeding point is arranged offset from the physical center point of the main radiation source, wherein the feeding point is located at the main radiation source to the physical center point is a polarization direction, and a direction perpendicular to the polarization direction is a non-polarization direction, wherein the main radiation source has two opposite polarization sides through the polarization direction, and two opposite non-polarized sides through the non-polarized direction, wherein the two non-polarized sides of the main radiation source are recessed toward the physical center point of the main radiation source and are concavely disposed; and

at least one auxiliary radiation source, wherein the auxiliary radiation source and the main radiation source are respectively equidistant from the reference ground, wherein the auxiliary radiation source and the main radiation source are along the physical center of the main radiation source The connection line between the point and the feeding point is arranged and electrically connected, wherein the distance parameter D1 between the main radiation source and the adjacent auxiliary radiation source in the polarization direction satisfies λ/8≤ D1≤λ/2, where λ is the wavelength parameter corresponding to the feeding frequency, and the distance between the side of the reference ground corresponding to the non-polarized side of the main radiation source and the non-polarized side is The distance parameter D2 of the non-polarized direction satisfies D2≧λ/32.

In an embodiment, the side length parameter of the polarized side of the main radiation source is a, and the side length parameter of the non-polarized side is b, wherein the parameter a and the parameter b respectively satisfy λ/8≤a≤λ/2 and λ/8≤b≤λ/2.

In an embodiment, wherein the parameter a and the parameter b tend to λ/4 within a 20% error range.

In an embodiment, the main radiation source and the adjacent auxiliary radiation sources are electrically connected via a microstrip impedance line, wherein the microstrip impedance line is along the feed of the main radiation source The connection line between the point and the physical center point is set to correspond to the state in which the auxiliary radiation source and the main radiation source are electrically connected along the connection line between the physical center point of the main radiation source and the feeding point , wherein the length parameter L of the microstrip impedance line satisfies λ/8≤L≤λ/2.

In an embodiment, the line width parameter W of the microstrip impedance line satisfies 0.05mm≤W≤3.2mm.

In one embodiment, the parameter L and the parameter D1 satisfy L>D1.

In one embodiment, one end of the microstrip impedance line connected to the main radiation source extends toward the inside of the main radiation source to form a feeding slot in the main radiation source, so as to form L> Structural relationship of D1.

In an embodiment, the number of the auxiliary radiation source is one, wherein the main radiation source and the auxiliary radiation source are sequentially arranged along the polarization direction.

In an embodiment, the number of the auxiliary radiation source is one, wherein the auxiliary radiation source and the main radiation source are sequentially arranged along the polarization direction.

In an embodiment, the number of the auxiliary radiation sources is greater than one, wherein the main radiation source and the adjacent auxiliary radiation sources are along the line connecting the physical center point of the main radiation source and the feeding point are arranged and electrically connected, and the adjacent auxiliary radiation sources are arranged and electrically connected along the connection line between the physical center point of the main radiation source and the feeding point, so as to form a corresponding A state in which the auxiliary radiation source and the main radiation source are arranged and electrically connected along the connection line between the physical center point of the main radiation source and the feeding point.

In an embodiment, each of the auxiliary radiation sources is preferably arranged on the same side of the main radiation source along the line connecting the physical center point of the main radiation source and the feeding point.

In an embodiment, wherein the primary radiation originates from a physical center point grounded.

In one embodiment, the main radiation originating from a physical center point is electrically connected to the reference ground and grounded.

In one embodiment, at least one of the auxiliary radiations is grounded from its physical center point.

In one embodiment, wherein the auxiliary radiation source has the same shape and dimensions as the primary radiation source.

Other objects and advantages of the present invention will be further manifested by the detailed description and the contents of the claims.

Description of drawings

FIG. 1A is a schematic structural diagram of a microwave detection module with a conventional planar radiation source structure.

FIG. 1B is a radiation pattern of the conventional microwave detection module of the planar radiation source structure.

2A is a schematic structural diagram of a microwave detection module having a narrow and long detection surface according to a preferred embodiment of the present invention.

FIG. 2B is a radiation pattern of the microwave detection module with a long and narrow detection surface according to the above preferred embodiment of the present invention.

3A is a schematic structural diagram of the microwave detection module with a long and narrow detection surface according to an optimized embodiment of the above preferred embodiment of the present invention.

FIG. 3B is a radiation pattern of the microwave detection module with a long and narrow detection surface according to the above-mentioned preferred embodiment of the present invention.

4A is a schematic structural diagram of the microwave detection module with a long and narrow detection surface according to a comparative embodiment of the above-mentioned preferred embodiment of the present invention.

FIG. 4B is a radiation pattern of the microwave detection module with a narrow and long detection surface according to the comparative embodiment.

Detailed ways

The following description serves to disclose the invention to enable those skilled in the art to practice the invention. The preferred embodiments described below are given by way of example only, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It should be understood by those skilled in the art that in the disclosure of the present invention, the terms "portrait", "horizontal", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and to simplify the description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus the above terms should not be construed as limiting the invention.

It should be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be one. The number may be plural, and the term "one" should not be understood as a limitation on the number.

Referring to FIGS. 2A and 2B of the accompanying drawings of the present invention, the structure and radiation pattern of a microwave detection module 10 with a long and narrow detection surface according to a preferred embodiment of the present invention are respectively illustrated, wherein the The microwave detection module 10 with an elongated detection surface has a polarization direction (corresponding to the Y-axis direction in FIG. 2B ) and can form a radiation space 100 compressed in the polarization direction, corresponding to the microwave detection with the elongated detection surface. A target detection direction of the module 10 (corresponding to the Z-axis direction in FIG. 2B ), the radiation space 100 has an elongated projection surface narrowed and adjusted in the polarization direction on the corresponding target detection surface, so that the The microwave detection module 10 with a long and narrow detection surface is suitable for the target detection space required by the narrow and long target detection surface, and at the same time, the adaptability of the microwave detection module 10 with a long and narrow detection surface to the environment and the detection reliability of the corresponding target detection space are improved. sex.

Specifically, the microwave detection module 10 with a long and narrow detection surface includes a reference ground 11, a main radiation source 12 and at least one auxiliary radiation source 13, wherein the main radiation source 12 and the auxiliary radiation source 13 are respectively connected to the The reference grounds 11 are arranged at equal intervals, wherein the main radiation source 12 has a feeding point 122 that deviates from its physical center point 121, then the feeding point 122 of the main radiation source 12 is physically The connection direction of the center point 121 is the polarization direction of the main radiation source 12 , and the direction from the reference ground 11 to the main radiation source 12 is the target detection direction of the microwave detection module 10 with the narrow and long detection surface, wherein The auxiliary radiation source 13 and the main radiation source 12 are arranged and electrically connected along the connection line between the physical center point 121 of the main radiation source 12 and the feeding point 122, so that in the main radiation source 12 When the radiation source 12 is fed at the feeding point 122 , each of the auxiliary radiation sources 13 has the same polarization direction as the main radiation source 12 . The distance between the auxiliary radiation sources 13 is set, the number of the auxiliary radiation sources 13 is set, and the distance between the adjacent auxiliary radiation sources 13 is set. The microwave detection module 10 with a narrow and long detection surface can be based on beam synthesis. When a radiation space 100 is formed, the radiation space 100 corresponds to the radiation coverage of the microwave detection module 10 having the narrow and long detection surface, and the radiation space 100 has a beam angle that is compressed and adjusted in the polarization direction.

In detail, in this embodiment of the present invention, the number of the auxiliary radiation source 13 is one, wherein the auxiliary radiation source 13 is located along one side of the main radiation source 12 through the polarization direction. The polarization direction is set, that is, the main radiation source 12 and the auxiliary radiation source 13 are sequentially arranged along the polarization direction, wherein the main radiation source 12 and the auxiliary radiation source 13 are located between the main radiation source 12 and the auxiliary radiation source 13. The distance parameter D1 of the polarization direction satisfies λ/8≤D1≤λ/2, where λ is the wavelength parameter corresponding to the feeding frequency, so as to ensure that the main radiation source 12 and the auxiliary radiation source 13 are The electric field between the reference ground 11 couples energy, and maintains the phase difference of the radiation beams formed by the coupling of the main radiation source 12 and the auxiliary radiation source 13 with the reference ground 11 respectively within the range of 180°, so that in the When the auxiliary radiation source 13 has the same polarization direction as the main radiation source 12 , it is favorable for the synthesis of radiation beams formed by coupling the main radiation source 12 and the auxiliary radiation source 13 with the reference ground 11 respectively. Then, the radiation space 100 is allowed to be formed based on beamforming and has a beam angle that is compressed and adjusted in the polarization direction according to the value of the parameter D1.

It is worth mentioning that, in some embodiments of the present invention, the main radiation source 12 and the auxiliary radiation source 13 are sequentially arranged along the opposite direction of the polarization direction, which is not limited in the present invention. The main radiation source 12 and the auxiliary radiation source 13 satisfy: the auxiliary radiation source 13 and the main radiation source 12 are along the line connecting the feeding point 122 of the main radiation source 12 and the physical center point 121 is arranged, and when the number of the auxiliary radiation sources 13 is greater than one, each of the auxiliary radiation sources 13 is located on the same side of the main radiation source 12, between adjacent auxiliary radiation sources 13 and the The main radiation source 12 and the adjacent auxiliary radiation sources 13 are electrically connected, so that when the main radiation source 12 is fed at the feeding point 122, each of the auxiliary radiation sources 13 has a The main radiation source 12 has the same polarization direction.

Further, in this embodiment of the present invention, the main radiation source 12 and the auxiliary radiation source 13 are electrically connected via a microstrip impedance line 14, wherein the microstrip impedance line 14 is along the pole The direction is connected between the main radiation source 12 and the auxiliary radiation source 13, so as to form the auxiliary radiation source 13 and the main radiation source 12 along the physical center point 121 of the main radiation source 12 and all the In the state where the connection lines of the feeding point 122 are arranged and electrically connected, wherein the length parameter of the microstrip impedance line 14 is L, the parameter L corresponds to the parameter D1 and satisfies λ/8≤L ≤λ/2.

In particular, the line width parameter of the microstrip impedance line 14 is W, wherein the parameter W satisfies 0.05mm≤W≤3.2mm, so that the microstrip impedance line satisfies λ/8≤L≤λ/ At the same time, the impedance matching requirements of the microwave detection module 10 with the narrow and long detection surface can be met based on the selection of the parameter W.

It is worth mentioning that, in this embodiment of the present invention, there is a relationship of L>D1 between the parameter L and the parameter D1. Specifically, the microstrip impedance line 14 is connected between the main radiation source 12 and the auxiliary radiation source 13 along the polarization direction, wherein λ/8≤L≤λ/2 for the purpose of impedance matching The fine adjustment of the line length of the microstrip impedance line 14 within the range of the microstrip impedance line 14 is allowed. The main radiation source 12 is formed with a feeding slot 125 so as to form a structural relationship of L>D1.

Similarly, for the purpose of impedance matching, the microstrip impedance line 14 is fine-tuned within the range of λ/8≤L≤λ/2, and the microstrip impedance line 14 is connected to the auxiliary radiation source One end of 13 is allowed to extend to the inside of the auxiliary radiation source 13 to form an auxiliary feeding slot 131 in the auxiliary radiation source, thereby forming a structural relationship of L>D1.

That is to say, in order to ensure the electric field coupling energy between the main radiation source 12 and the auxiliary radiation source 13 and the reference ground 11, respectively, the main radiation source 12 and the auxiliary radiation source 13 are in the The distance parameter D1 of the polarization direction satisfies D1≥λ/8, in order to maintain the phase difference of the radiation beams formed by the coupling of the main radiation source 12 and the auxiliary radiation source 13 with the reference ground 11 respectively within the range of 180° , the length parameter of the microstrip impedance line 14 satisfies L≤λ/2, wherein the microstrip impedance line 14 is connected between the main radiation source 12 and the auxiliary radiation source 13 along the polarization direction based on the On the basis of L≥D1, the parameter D1 and the parameter L satisfy λ/8≤D1≤λ/2 and λ/8≤L≤λ/2 respectively.

It can be understood that, in some embodiments of the present invention, the number of the auxiliary radiation sources 13 is multiple, wherein each of the auxiliary radiation sources 13 and the main radiation source 12 is along the physical direction of the main radiation source 12 The connection line between the center point 121 and the feeding point 122 is arranged and electrically connected, that is, the main radiation source 12 and the adjacent auxiliary radiation source 13 are located along the physical center point 121 of the main radiation source 12 The connection lines with the feeding point 122 are arranged and electrically connected, and the adjacent auxiliary radiation sources 13 are located along the physical center point 121 of the main radiation source 12 and the feeding point 122. The connection lines are arranged and electrically connected, so that the auxiliary radiation source 13 and the main radiation source 12 are formed along the connection line between the physical center point 121 of the main radiation source 12 and the feeding point 122 . The state of being arranged and electrically connected.

Further, when the number of the auxiliary radiation sources is greater than one, each of the auxiliary radiation sources 13 is preferably on the same side of the main radiation source 12 along the physical center point 121 of the main radiation source 12 and the feeder. The connection lines of the electrical points 122 are arranged to be further electrically connected with the adjacent auxiliary radiation sources 13, so that when the main radiation source 12 is fed at the feeding point 122, each The auxiliary radiation source 13 has the same polarization direction as the main radiation source 12, wherein the distance parameter between the adjacent auxiliary radiation sources 13 in the polarization direction corresponds to the parameter D1 and satisfies that the parameter D1 is greater than or equal to λ /8 and the range less than or equal to λ/2.

Further, two opposite sides of the main radiation source 12 through the polarization direction are defined as two polarization sides 123, and the main radiation source 12 is defined to be perpendicular to the polarization direction and the target detection at the same time. The two opposite sides of a non-polarized direction of the direction (corresponding to the X-axis direction in FIG. 2B, that is, in the direction perpendicular to the polarized direction of the main radiation source 12) are two non-polarized sides 124, wherein the The projections of the main radiation source 12 and each of the auxiliary radiation sources 13 on the reference ground 11 in the reverse direction of the target detection direction are located in the reference ground 11 , wherein each of the auxiliary radiation sources 13 is in the main radiation source 13 . The side of the radiation source 12 corresponding to one of the polarized edges 123 is set along the connection line between the physical center point 121 of the main radiation source 12 and the feeding point 122 , so that when the main radiation source 12 is on the When the feeding point 122 is fed, the auxiliary radiation source 13 has the same polarization direction as the main radiation source 12 .

Specifically, in this embodiment of the present invention, the side length parameter of the polarized side 123 of the main radiation source 12 is a, and the side length parameter of the non-polarized side 124 is b, wherein the parameter a and the parameter b satisfy λ/8≤a≤λ/2 and λ/8≤b≤λ/2, respectively, so as to help satisfy the impedance matching of the microwave detection module 10 with a long and narrow detection surface, and ensure The main radiation source 12 has a circumference greater than or equal to λ/2 to generate initial polarization to radiate electromagnetic energy to the outside world when being fed. The area of the main radiation source 12 is reduced, wherein preferably, the side length parameter a of the polarized side 123 of the main radiation source 12 and the side length parameter b of the non-polarized side 124 have an error of 20% The range tends to λ/4, so that the main radiation source 12 has a perimeter that tends to λ, which is beneficial to improve the radiation efficiency of the microwave detection module 10 with a long and narrow detection surface.

It is worth mentioning that the auxiliary radiation source 13 has the same side length parameter limitation requirements as the main radiation source 12, wherein the auxiliary radiation source 13 preferably has the same shape and size as the main radiation source 12, However, the auxiliary radiation source 13 is not limited to have the same shape and size as the main radiation source 12 under the limitation of the above-mentioned side length parameters.

In particular, in this embodiment of the present invention, the two non-polarized sides 124 of the main radiation source 12 are concave and concave toward the physical center point 121 of the main radiation source 12, so as to maintain The main radiation source 12 reduces the area of the main radiation source 12 at the same time as the corresponding perimeter requirements, and when the main radiation source 12 is fed at the feeding point 122, based on the main radiation source 12 The two non-polarized sides 122 are concavely arranged, and the potential distribution of the non-polarized sides 122 is enhanced, correspondingly enhancing the main radiation source 12 between the two non-polarized sides 124 and the reference ground The electric field coupling of 11 and the electric field coupling between the two ends of each of the non-polarized sides 124 of the main radiation source 12, that is, the non-polarized direction (corresponding to the X-axis direction in FIG. 2B ) enhances the The electric field coupling energy of the microwave detection module 10 with a narrow and long detection surface, so as to increase the beam angle of the radiation space 100 in the non-polarized direction, then in the target detection direction, the radiation space 100 detects the corresponding target The surface has an elongated projection surface that is narrowed and adjusted in the polarization direction.

That is to say, the present invention is based on the idea of synthesizing beams in the polarization direction and enhancing the electric field coupling energy of the microwave detection module 10 with a long and narrow detection surface in the non-polarized direction. The gain of the detection module 10 is increased, and at the same time, the radiation space 100 is compressed and adjusted in the polarization direction and has a beam angle that is increased and adjusted in the non-polarization direction, then in the target detection direction , the radiation space 100 has an elongated projection surface that is narrowed and adjusted in the polarization direction on the corresponding target detection surface.

It is worth mentioning that, since the gain of the microwave detection module 10 with the narrow and long detection surface is improved, the microwave detection module 10 with the narrow and long detection surface is also suitable for the target detection space with the requirement of longer detection distance, which improves the overall performance. The adaptability of the microwave detection module 10 with the narrow and long detection surface to the corresponding target detection space is described. At the same time, since the radiation space 100 has a narrow and long projection surface that is narrowed and adjusted in the polarization direction on the corresponding target detection surface, the radiation space 100 in the polarization direction is reduced to a non-target detection space. Therefore, it is beneficial to avoid the action interference and electromagnetic interference of the non-target detection space in the polarization direction of the microwave detection module with the long and narrow detection surface, that is, the microwave detection module with the long and narrow detection surface 10 pairs of The adaptability of the corresponding non-target detection space is improved, and the reliability of detection of the corresponding target detection space is improved.

Further, in this embodiment of the present invention, based on balancing the distribution of the electric field coupling energy of the microwave detection module 10 with the long and narrow detection surface in the non-polarized direction, the radiation space 100 located in the non-target A sub-lobe 101 in the detection space and opposite to the detection direction of the target (corresponding to the plane defined by the X axis and the Y axis in FIG. 2B as a boundary, the radiation space 100 is in the opposite direction of the target detection direction The generation of the part) is suppressed, that is, the radiation of the radiation space 100 in the reverse direction of the target detection direction to the non-target detection space is reduced, which is beneficial to avoid the reverse direction of the target detection direction. The action interference and electromagnetic interference of the non-target detection space further improves the adaptability of the microwave detection module 10 with the narrow and long detection surface to the corresponding non-target detection space, and the detection of the target detection space required by the narrow and long target detection surface reliability.

Specifically, in this embodiment of the present invention, based on the concave arrangement of the two non-polarized sides 124 of the main radiation source 12 and the size arrangement of the main radiation source 12 and the reference ground 11, the Between the side of the reference ground 11 corresponding to the non-polarized side 124 of the main radiation source 12 and the corresponding non-polarized side 124 of the main radiation source 12 in the non-polarized direction The distance parameter D2 satisfies D2≥λ/32, so as to balance the distribution of the electric field coupling energy of the microwave detection module 10 with the narrow and long detection surface in the non-polarized direction, that is, by increasing in the non-polarized direction The size of the reference ground 11 enhances the electric field coupling strength of the main radiation source 12 between the two non-polarized sides 124 and the reference ground 11 within a certain range, and correspondingly reduces the strength of the main radiation source 12 . The maximum electric field coupling strength between the two ends of the non-polarized side 124 to avoid the concave arrangement of the two non-polarized sides 124 of the main radiation source 12 from causing the The maximum electric field coupling strength between the two ends of the non-polarized edge 124 is too strong, which correspondingly avoids causing the near-field radiation imbalance of the microwave detection module 10 with the narrow and long detection surface. The distribution of the electric field coupling energy of the microwave detection module 10 in the non-polarized direction balances the near-field radiation of the microwave detection module 10 with the narrow and long detection surface, thereby suppressing the radiation space 100 located in the non-target The generation of the side lobes 101 in the detection space and opposite to the detection direction of the target.

It is worth mentioning that the generation of the side lobes 101 located in the non-target detection space and opposite to the target detection direction of the radiation space 100 is suppressed, that is, the radiation space 100 is located in the target detection space. The radiation energy of the non-target detection space in the reverse direction of the detection direction is reduced, which is beneficial to avoid the action interference and electromagnetic interference of the non-target detection space in the reverse direction of the target detection direction, and further improves the The adaptability of the microwave detection module 10 with the long and narrow detection surface to the corresponding non-target detection space, and the detection reliability of the target detection space required by the narrow and long target detection surface.

In particular, the radiation energy of the radiation space 100 in the opposite direction of the target detection direction to the non-target detection space is reduced, then the multiple reflections of the side lobes in the non-target detection space cause The self-excited interference can be suppressed.

That is to say, the microwave detection module 10 with a narrow and long detection surface is suitable for the target detection space required for a longer detection distance, so that the adaptability of the microwave detection module 10 with a narrow and long detection surface to the corresponding target detection space is improved, At the same time, the action interference, electromagnetic interference and self-excited interference of the non-target space can be suppressed, so that the adaptability of the microwave detection module 10 with the narrow and long detection surface to the corresponding non-target detection space is improved, then the The adaptability of the surface microwave detection module 10 to the environment is improved and can be stably and reliably used in industrial production or storage places to perform microwave detection on the target detection space required by the narrow and long target detection surface, which improves the microwave detection of the long and narrow detection surface. The suitability and reliability of the detection module 10 .

Further, in this embodiment of the present invention, the main radiation source 12 is grounded at the physical center point 121. Specifically, in this embodiment of the present invention, the main radiation source 12 is connected to the The physical center point is electrically connected to the reference ground 11 and is grounded, so that by reducing the impedance of the main radiation source 12 to ground, the quality factor ( That is, the Q value), correspondingly narrows the bandwidth of the microwave detection module 10 with a long and narrow detection surface, thereby helping to improve the anti-interference performance of the microwave detection module 10 with a long and narrow detection surface.

Further referring to FIGS. 3A and 3B of the accompanying drawings in the description of the present invention, the structure and radiation pattern of the microwave detection module 10 with a long and narrow detection surface according to an optimized embodiment of the above-mentioned preferred embodiment of the present invention are respectively. is illustrated, wherein in this preferred embodiment of the present invention, the auxiliary radiation source 13 is further recessed through the two opposite sides of the non-polarization direction, so that the auxiliary radiation source 13 has the same Under the same perimeter limit requirement of the main radiation source 12, the area of the auxiliary radiation source 13 is reduced while maintaining the corresponding perimeter requirement of the auxiliary radiation source 13, and the auxiliary radiation source 13 is enhanced in the non-polar area. The electric field coupling between the polarized direction and the reference ground 11 and the electric field coupling between the two ends of the side of the auxiliary radiation source 13 through the non-polarized direction, so that the the beam angle of the radiation space 100.

In particular, in this embodiment of the present invention, the auxiliary radiation source 13 is grounded at its physical center point. Specifically, the auxiliary radiation source 13 is electrically connected to the reference ground 11 at its physical center point. is grounded, so that by further reducing the impedance to ground of the auxiliary radiation source 13, the quality factor (ie, the Q value) of the microwave detection module 10 with the long and narrow detection surface is further improved, correspondingly narrowing the The bandwidth of the microwave detection module 10 on the detection surface is beneficial to improve the anti-interference performance of the microwave detection module 10 with the narrow and long detection surface.

In contrast, referring to FIG. 4A and FIG. 4B of the accompanying drawings of the description of the present invention, the comparison structure and radiation pattern of the microwave detection module 10 with a narrow and long detection surface when the parameter D2 is less than λ/32 are respectively illustrated. , specifically, in this comparison structure, the side of the reference ground 11 corresponding to the non-polarized side 124 of the main radiation source 12 and the corresponding non-polarized side of the main radiation source 12 The sides 124 are kept aligned, so that when the main radiation source 12 is fed at the feeding point 122, based on the two non-polarized sides 122 of the main radiation source 12 being concavely disposed, the non-polarized sides 122 of the main radiation source 12 are The potential distribution of the polarized edge 122 is enhanced, correspondingly enhancing the electric field coupling between the two ends of each of the non-polarized edges 124 of the main radiation source 12, that is, at the same time perpendicular to the polarization direction and the The non-polarization direction of the target detection direction enhances the electric field coupling energy of the microwave detection module 10 with the narrow and long detection surface, so that the beam angle of the radiation space 100 is increased in the non-polarization direction. In the target detection direction, the radiation space 100 has a narrow and elongated projection surface on the corresponding target detection surface that is narrowed and adjusted in the polarization direction.

However, since the distribution of the electric field coupling energy in the non-polarized direction of the microwave detection module 10 with the long and narrow detection surface cannot be further balanced, specifically, in this comparison structure, the two sides of the main radiation source 12 The coupling between the non-polarized side 124 and the corresponding reference ground 11 is limited, and the concave arrangement of the two non-polarized sides 124 of the main radiation source 12 enhances the potential distribution of the non-polarized side 122, And cause the maximum electric field coupling strength between the two ends of each of the non-polarized sides 124 of the main radiation source 12 to be too strong, thereby causing the near-field radiation of the microwave detection module 10 with the narrow and long detection surface to be unbalanced, That is, the imbalance of the near-field radiation of the microwave detection module 10 having the narrow and long detection surface is caused, and the radiation energy of the side lobes 101 is correspondingly enhanced. Therefore, based on the comparison structure, it can be seen that the setting of the parameter D2 satisfying D2≥λ/16 can balance the distribution of the electric field coupling energy of the microwave detection module 10 with the narrow and long detection surface in the non-polarized direction, and correspondingly reduce the The radiation space 100 is radiated from the non-target detection space in the reverse direction of the target detection direction, thereby helping to avoid the action interference and electromagnetic interference of the non-target detection space in the reverse direction of the target detection direction. , further improving the adaptability of the microwave detection module 10 with the long and narrow detection surface to the corresponding non-target detection space, and the detection reliability of the target detection space required by the narrow and long target detection surface.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

It should be understood by those skilled in the art that the embodiments of the present invention shown in the above description and the accompanying drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may be modified or modified in any way without departing from the principles.

Claims (15)

1. A microwave detection module having an elongated detection surface, comprising:

a reference ground;

a main radiation source, wherein the main radiation source has a feeding point, wherein the feeding point is disposed offset from a physical center point of the main radiation source, wherein a polarization direction is from the feeding point to the physical center point in the main radiation source, and a non-polarization direction is from a direction perpendicular to the polarization direction, wherein the main radiation source has two opposite polarization sides passing through the polarization direction, and two opposite non-polarization sides passing through the non-polarization direction, wherein the two non-polarization sides of the main radiation source are recessed and disposed toward the physical center point of the main radiation source; and

at least one auxiliary radiation source, wherein the auxiliary radiation source and the main radiation source are respectively spaced apart from the reference ground at equal intervals, wherein the auxiliary radiation source and the main radiation source are arranged and electrically connected along a connecting line of a physical center point of the main radiation source and the feeding point, wherein a distance parameter D1 between the main radiation source and the adjacent auxiliary radiation source in the polarization direction satisfies λ/8 ≤ D1 ≤ λ/2, wherein λ is a wavelength parameter corresponding to a feeding frequency, and wherein a distance parameter D2 between a side of the reference ground corresponding to the non-polarization side of the main radiation source and the non-polarization side in the non-polarization direction satisfies D2 ≥ λ/32.

2. The microwave detection module with an elongated detection face as claimed in claim 1, wherein a side length parameter of the polarized side of the primary radiation source is a and a side length parameter of the non-polarized side is b, wherein the parameters a and b satisfy λ/8 ≦ a ≦ λ/2 and λ/8 ≦ b ≦ λ/2, respectively.

3. A microwave detection module with an elongated detection face according to claim 2, wherein said parameter a and said parameter b tend to be λ/4 within a 20% error range.

4. The microwave detection module with an elongated detection surface as claimed in claim 2, wherein the main radiation source and the adjacent auxiliary radiation source are electrically connected via a microstrip impedance line, wherein the microstrip impedance line is disposed along a line connecting the feeding point and the physical center point of the main radiation source, so as to correspond to a state where the auxiliary radiation source and the main radiation source are electrically connected along a line connecting the physical center point and the feeding point of the main radiation source, wherein a length parameter L of the microstrip impedance line satisfies λ/8 ≦ L ≦ λ/2.

5. The microwave detection module with an elongated detection face according to claim 4, wherein the line width parameter W of the microstrip impedance line satisfies 0.05mm ≦ W ≦ 3.2 mm.

6. The microwave detection module with an elongated detection face of claim 5, wherein the parameter L and the parameter D1 satisfy L > D1.

7. The microwave detection module with elongated detection surface as claimed in claim 6, wherein one end of the microstrip impedance line connected to the main radiation source extends toward the inside of the main radiation source to form a feeding slot in the main radiation source, such that the structural relationship of L > D1 is formed.

8. The microwave detection module with an elongated detection face according to claim 5, wherein the number of auxiliary radiation sources is one, wherein the primary radiation source and the auxiliary radiation source are arranged sequentially along the polarization direction.

9. The microwave detection module with an elongated detection face according to claim 5, wherein the number of auxiliary radiation sources is one, wherein the auxiliary radiation source and the main radiation source are arranged sequentially along the polarization direction.

10. The microwave detection module with an elongated detection surface as claimed in claim 5, wherein the number of the auxiliary radiation sources is more than one, wherein the main radiation source and the adjacent auxiliary radiation sources are arranged and electrically connected along a line connecting the physical center point of the main radiation source and the feeding point, so as to form a state where the auxiliary radiation sources and the main radiation sources are arranged and electrically connected along a line connecting the physical center point of the main radiation source and the feeding point.

11. The microwave detection module with an elongated detection face according to claim 10, wherein each of the auxiliary radiation sources is arranged along a line connecting the physical center point of the main radiation source and the feeding point, preferably on the same side of the main radiation source.

12. A microwave detection module with an elongate detection face according to any one of claims 1 to 11, wherein the primary radiation originates from a physical central point and is grounded.

13. The microwave detection module with an elongated detection face of claim 12, wherein the primary radiation originates at a physical center point and is electrically connected to the ground reference and grounded.

14. A microwave detection module with an elongate detection face according to claim 13, wherein at least one said auxiliary radiation is grounded from its physical central point.

15. The microwave detection module with an elongated detection face of claim 13, wherein the auxiliary radiation source has the same shape and size as the primary radiation source.

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