CN212031760U - 5.8GHz miniature microwave detection module - Google Patents

Abstract

The utility model discloses a miniature microwave detection module of 5.8GHz, wherein miniature microwave detection module of 5.8GHz includes a radiation source base plate, a ground base plate of reference and a shield cover, wherein the ground base plate of reference is laminated in the radiation source base plate by the butt in the shield cover, wherein the shield cover is welded in the radiation source base plate is then in the ground base plate of reference is laminated in the radiation source base plate with by the butt in under the state of shield cover, through the shield cover is welded fastening in the mode of radiation source base plate forms the radiation source base plate the ground base plate of reference and the state of stable connection between the shield cover three, wherein through right the radiation source base plate the ground base plate of reference and the adjustment of connection structure and equipment between the shield cover three reduces the radiation source base plate the ground base plate of reference and the size of shield cover is in order to reduce the chi of miniature microwave detection module of 5.8GHz Cun.

Description

5.8GHz miniature microwave detection module

Technical Field

The utility model relates to a microwave detection field especially relates to a miniature microwave detection module of 5.8 GHz.

Background

A conventional microwave detection module generally includes a radiation source substrate carrying a radiation source, a reference ground substrate carrying a reference ground, and a shielding cover, wherein the radiation source is fixed to the reference ground substrate and is correspondingly formed in a state where the radiation source and the reference ground are spaced apart from each other by the radiation source substrate, the shielding cover is generally disposed on a side of the reference ground substrate opposite to the side carrying the reference ground, the radiation source has a feeding point, a circuit unit is further carried on the side of the reference ground substrate on which the shielding cover is disposed, the radiation source is electrically connected to the circuit unit from the feeding point, when the circuit unit is powered to generate an excitation signal, the excitation signal is coupled to the radiation source from the feeding point, and the microwave detection module is excited to radiate microwaves outwards, and receiving reflected microwaves formed by the microwaves reflected by at least one object, and outputting a detection signal based on the difference of characteristic parameters between signals corresponding to the microwaves and the reflected microwaves, wherein the detection signal is feedback to the motion of the object.

The existing microwave detection module generally assembles the radiation source substrate, the reference ground substrate and the shielding cover in a sequential stacking manner, specifically, the shielding cover and the radiation source substrate are respectively welded and fixed on two opposite sides of the reference ground substrate. Since the radiation source substrate, the reference ground substrate and the shielding case are connected in a sequential stacking manner, the thickness and volume of the conventional microwave detection module are limited by the thickness and size of the radiation source substrate, the reference ground substrate and the shielding case, and cannot be further thinned and reduced, so that the application range of the microwave detection module is limited. Moreover, since the shielding cover is soldered to the side of the reference ground substrate opposite to the side carrying the reference ground, the reference ground substrate needs to reserve not only enough installation space for arranging the circuit unit, but also enough installation space for installing the shielding cover, so that the reference ground substrate needs to be provided with a larger area and a larger volume, which results in a defect that the existing microwave detection module has a larger volume and occupies a larger installation space when being installed. In addition, since the shielding cover of the conventional microwave detection module is disposed on a side of the reference ground substrate carrying the circuit unit, that is, the shielding cover is spaced from the reference ground by the reference ground substrate, that is, the shielding cover cannot shield the edge of the reference ground substrate, the circuit unit carried on the reference ground substrate can radiate electromagnetic interference outwards from the edge of the reference ground substrate and is interfered by external electromagnetic radiation, which is not favorable for the working stability of the microwave detection module.

It is worth mentioning that, since the radiation source substrate, the ground reference substrate and the shielding cover are assembled in a sequential stacking manner, the structural fixation of the existing microwave detection module depends on the welding fixation between the shielding cover and the ground reference substrate and the welding fixation between the radiation source substrate and the ground reference substrate, that is, there is no direct fixation relationship between the radiation source substrate and the shielding cover, that is, the structural stability and consistency of the existing microwave detection module depend on the welding fixation between the ground reference substrate and the shielding cover and the welding fixation between the ground reference substrate and the radiation source substrate, so that the structural stability and consistency of the existing microwave detection module are difficult to guarantee, wherein the stability of the connection among the radiation source substrate, the ground reference substrate and the shielding cover may cause damage to the microwave detection module The performance of the microwave detection module is significantly affected, especially, the soldering fixation between the reference ground substrate and the radiation source substrate, such as the reflow soldering fixation or the spot welding fixation between the reference ground substrate and the radiation source substrate, makes it difficult to precisely control the impedance of the radiation gap formed between the spaced radiation source and the reference ground based on the high-speed diffusion of tin in the liquid state, and it is difficult to control the performance parameters of the microwave detection module, such as impedance matching, bandwidth, and dielectric loss, and therefore, the performance stability and consistency of the microwave detection module are difficult to be ensured based on the structure and manufacturing process of the existing microwave detection module.

In general, the connection structure and assembly process among the radiation source, the reference ground and the shielding case of the existing microwave detection module cause the defects that the existing microwave detection module is large in size, complex in manufacturing process, long in time consumption and difficult to guarantee stability and consistency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein miniature microwave detection module of 5.8GHz is small and stable in structure.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the miniature microwave detection module of 5.8GHz includes a radiation source base plate, is laminated in a reference foundation plate and a shield cover of radiation source base plate, wherein through right the radiation source base plate refer to the foundation plate and connection structure between the shield cover three and the adjustment of equipment mode reduce the radiation source base plate refer to the foundation plate and the size of shield cover so that the miniature microwave detection module of 5.8GHz is miniaturized the setting.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein be in reference the foundation plate be laminated in radiation source base plate with by the butt in on the structure basis of shield cover, the shield cover is with the parcel the state of reference the side of foundation plate is welded in the radiation source base plate, in order to reduce the thickness of the miniature microwave detection module of 5.8GHz, thereby be favorable to the miniature microwave detection module of 5.8GHz is miniaturized the setting.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the shield cover is with the parcel the mode of referring to the side of foundation plate is welded in the radiation source base plate, then the installation need not to reserve referring to the foundation plate the space of shield cover is in order to be favorable to reducing the size of reference foundation plate, thereby be favorable to miniature microwave detection module of 5.8GHz is miniaturized the setting.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the two sides that the radiation source base plate is relative are provided with one and first cover the copper layer and a second covers the copper layer, wherein the reference foundation plate is provided with a metal layer, wherein through with the metal layer electrically conductive laminating in the mode that the second covered the copper layer, in first copper layer covers a radiation source, and in the metal layer forms one and consults ground, wherein the radiation source with consult ground quilt the radiation source base plate sets up with looks interval, then the radiation source base plate with reference foundation plate forms a flat structure, so is favorable to miniature microwave detection module of 5.8GHz is miniaturized the setting.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source has a feed point, wherein define the feed point to the direction of the physical central point of radiation source does the polarization direction of radiation source, wherein establishes the radiation source be the length of a side of the last limit of polarization direction is a parameter L1, wherein parameter L1 is set up to be greater than quarter wavelength and be less than half wavelength, so in order to be favorable to reducing the radiation source with the radiation source substrate size.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein establish the perpendicular to of radiation source the length of side of the ascending limit of the orientation of polarization is a parameter L2, wherein parameter L2 is set up to be greater than quarter times wavelength and be less than half times wavelength, so in order to be favorable to reducing the radiation source with the radiation source substrate size.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source with the ground of reference the radiation source polarization direction has a preset distance, wherein establishes the preset distance is a parameter L4, wherein parameter L4 is set up to be greater than one sixteenth wavelength, so in order to ensure in the assurance the area of ground of reference ensures the radiation gain of the miniature microwave detection module of 5.8 GHz.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein establish reference ground the radiation source the length of side of the last limit of polarization direction is a parameter L5, wherein parameter L5 is set up to more than or equal to eighth wavelength, and it is so in order to guarantee in the assurance the area of reference ground ensures the radiation gain of miniature microwave detection module of 5.8 GHz.

An object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the edge of radiation source the side of polarization direction is set up by the indent ground, so in order to be favorable to further reducing the radiation source can also ensure at length direction's size 5.8GHz miniature microwave detection module's radiation gain.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein be in reference the ground base plate be laminated in the radiation source base plate with by the butt in on the structure basis of shield cover, through inciting somebody to action the shield cover weld in the mode of radiation source base plate can form the shield cover the radiation source base plate and reference the structural relation of stable connection between the ground base plate three, simplified the manufacturing process of the miniature microwave detection module of 5.8GHz has made things convenient for the production of the miniature microwave detection module of 5.8 GHz.

Another object of the present invention is to provide a 5.8GHz micro microwave detection module, wherein the radiation source substrate is provided with two welding grooves, wherein the shield case is extended to form two corresponding welding arms, wherein the structure for stable connection between the shield case and the radiation source substrate is formed by welding the welding arms to the corresponding welding grooves, so that on the basis of the structure that the reference ground substrate is attached to the radiation source substrate and abutted against the shielding case, the radiation source substrate, the reference ground substrate and the shielding cover are fixedly welded to form a stable connection structure, so as to simplify the manufacturing process of the 5.8GHz micro-microwave detection module while ensuring the structural stability of the 5.8GHz micro-microwave detection module.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein is at the perpendicular to the radiation source the polarization direction, the definition the straight line at the physical center point place of radiation source is an energy balance line, wherein the radiation source base plate in with the crossing side position of energy balance line sets up two the welding groove, then the shield cover in the welding position of radiation source base plate can ensure the stability and the uniformity of miniature microwave detection module of 5.8 GHz.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source base plate the ground base plate is referred to and form direct fixed relation between the shield cover three, in order to ensure the stability and the uniformity of miniature microwave detection module of 5.8 GHz.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the welding arm by the cover of shield cover along to the direction of radiation source base plate is extended and is formed, is favorable to the increase the shield cover with welded area between the radiation source base plate, thereby be favorable to improving the shield cover with the stability of connecting between the radiation source base plate.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein reference ground base plate both ends are extended and are formed with the salient two installation arms of shield cover, wherein the shield cover is provided with two mounting grooves, wherein reference ground base plate with two installation arm salient in the mode of shield cover by the butt in the shield cover then works as the shield cover is with the parcel the mode of the lateral wall of reference ground base plate is welded in during the radiation source base plate, form reference ground base plate is fixed in by the centre gripping the radiation source base plate with state between the shield cover.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the shield cover in the mounting groove extends and is formed with at least a locating column, wherein refer to two of ground base plate the installation arm correspondence is provided with at least a locating hole, wherein refer to the ground base plate in the locating hole is inlayed in the shield cover the reference column, in order to further improve refer to the ground base plate with the stability of connecting between the shield cover.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein the ground reference substrate the metal layer and the radiation source substrate the second copper-clad layer is conductive and laminated and forms a flat structure, so as to be favorable to reducing the dielectric loss of a radiation gap of the 5.8GHz microwave detecting module and the consistency of the dielectric loss of the radiation gap are maintained.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source base plate perpendicular to have in the direction of polarization direction extend outstanding in the part of referring to the foundation slab, just the radiation source base plate the welding groove set up in this of radiation source base plate extend outstanding in the part of referring to the foundation slab, then work as the shield cover is welded in the radiation source base plate during the welding groove, can avoid soldering tin infiltration the radiation source base plate with refer to between the foundation slab, in order to avoid influencing the radiation source base plate with refer to the roughness between the foundation slab.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein the shielding case is right to adjust the shape of the welding arm if will the welding arm is welded in the way that the one end of the welding groove is bent, the flow direction of the guiding solder is used to avoid the solder infiltration the reference ground substrate with between the radiation source substrates, thereby avoiding the influence the radiation source with the flatness between the reference ground.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source base plate in the size of dimension of polarization direction set up into with the size of dimension of shield cover keeps consistent in order to cover the corner gap of reference ground base plate, thereby can avoid the miniature microwave detection module of 5.8GHz certainly the corner gap external radiation secondary harmonic and the third harmonic of reference ground base plate are favorable to ensureing the job stabilization nature of the miniature microwave detection module of 5.8 GHz.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein the radiation source has two pads, wherein the pads are covered with the corresponding welding groove and electrically connected to the second copper-clad layer, wherein the shielding cover is welded to the pads and electrically connected to the reference ground, which is favorable for enhancing the electromagnetic shielding effect of a shielding space formed by the shielding cover.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein the radiation source has a feeding point, wherein the 5.8GHz microwave detecting module further comprises a circuit unit disposed at the back of the reference ground substrate, wherein the radiation source is derived from the feeding point electrically connected to the circuit unit in a metallized via hole manner, which is favorable for simplifying the radiation source and the circuit structure between the circuit units.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, establish wherein the circuit unit extremely the distance of the bottom medial surface of shield cover is parameter H1, wherein parameter H1 is set up to be greater than one sixteenth times wavelength, so in order to reduce miniature microwave detection module of 5.8GHz is in the repeated reflection in shielding space is favorable to being convenient for guarantee when miniature microwave detection module of 5.8GHz is by miniaturized setting miniature microwave detection module job stabilization nature of module of 5.8 GHz.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein the parameter H1 satisfies the following numerical range: h1 is more than or equal to 3.2mm, the thickness of the reference foundation plate tends to 0.5mm, the thickness of the radiation source foundation plate tends to 1.0mm, and the overall thickness of the 5.8GHz micro microwave detection module is a parameter H2, so that the numerical range of the parameter H2 meets the following requirements: h2 is more than or equal to 4.0mm and less than or equal to 8.0mm, so that the thickness of the 5.8GHz micro microwave detection module is favorably reduced.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source is grounded, then the impedance of the miniature microwave detection module of 5.8GHz is reduced, so that the quality factor (Q value promptly) of the miniature microwave detection module of 5.8GHz is improved, thereby is favorable to improving the interference killing feature of the miniature microwave detection module of 5.8 GHz.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the physics central point of radiation source is grounded in order to be favorable to restraining the miniature microwave detection module of 5.8GHz certainly the radiation source to the radiant energy of the radiation direction of reference ground is favorable to restraining promptly the vice lobe induction distance of the microwave beam of the miniature microwave detection module radiation of 5.8GHz corresponds and is favorable to improving the miniature microwave detection module of 5.8 GHz's interference killing feature.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the physics central point of radiation source forms an earth point with the mode of metallization via hole, in order to reduce in the time of the impedance of the miniature microwave detection module of 5.8GHz, be favorable to maintaining the radiation source is derived from current density distribution when the feed point is fed, thereby is favorable to the guarantee the radiation gain of the miniature microwave detection module of 5.8 GHz.

Another object of the utility model is to provide a miniature microwave detection module of 5.8GHz, wherein the radiation source the second cover the copper layer with refer to the ground base plate the metal level is with naked copper technology snap-on, has avoided the radiation gap forms anti-oxidant metal protection layer, has improved quality factor and transmission acceptance rate under the operating condition of the miniature microwave detection module of 5.8GHz are favorable to improving the gain and the sensitivity of the miniature microwave detection module of 5.8 GHz.

Another object of the present invention is to provide a 5.8GHz microwave detecting module, wherein in the manufacturing process of the 5.8GHz microwave detecting module, the process of forming the anti-oxidation metal protection layer by the surface treatment process is saved, which is beneficial to reducing the manufacturing cost of the 5.8GHz microwave detecting module.

For at least one purpose above the realization, the utility model provides a miniature microwave detection module of 5.8GHz, include:

a reference ground substrate, wherein the reference ground substrate carries a reference ground;

a radiation source substrate, wherein the radiation source substrate carries a radiation source, wherein the ground reference is attached to the radiation source substrate in a state spaced apart from the radiation source by the radiation source substrate, wherein the radiation source has a feed point, wherein the feed point is offset from a physical center point of the radiation source, wherein the direction defining the feeding point to the physical center point of the radiation source is the polarization direction of the radiation source, wherein a straight line defining a physical center point of the radiation source in the direction perpendicular to the polarization direction of the radiation source is an energy balance line, wherein the side length of the side of the radiation source passing through the polarization direction of the radiation source is set as a parameter L1, wherein the side length of the side of the radiation source passing through the energy balance line is a parameter L2, wherein the numerical range of the parameter L1 is set as: 10.34mm L1 25.86mm, wherein the value range of the parameter L2 is set as: l2 is more than or equal to 10.34mm and less than or equal to 25.86mm, wherein the radiation source substrate is provided with two welding grooves at the side position passing through the energy balance line; and

and the shielding cover is fixed on the radiation source substrate in a mode of being welded in the corresponding welding groove in a state of abutting against the reference ground substrate, and then the radiation source substrate, the reference ground substrate and the shielding cover are stably connected through welding and fixing of the radiation source substrate in the welding groove and the shielding cover in a state of abutting against the reference ground substrate.

In an embodiment of the present invention, the parameter L1 is approximately 12.93mm, and the parameter L2 is approximately 12.93 mm.

In an embodiment of the present invention, wherein the radiation source and the reference ground have a predetermined distance in the polarization direction of the radiation source, wherein the predetermined distance is a parameter L4, wherein the value range of the parameter L4 is set as: l4 is more than or equal to 3.23 mm.

In an embodiment of the present invention, the parameter L4 is approximately 4.5 mm.

In an embodiment of the present invention, a side length of the side of the reference ground in the polarization direction of the radiation source is a parameter L5, wherein a numerical range of the parameter L5 is set as: l5 is more than or equal to 6.47 mm.

In an embodiment of the present invention, wherein along the polarization direction, the size of the radiation source substrate is set to be consistent with the size of the shielding case, wherein it is set that the radiation source substrate is along the size of the polarization direction is a parameter L6, wherein the parameter L6 tends to 16 mm.

In an embodiment of the present invention, a side length of the side of the radiation source substrate in the polarization direction is set to correspond to and be greater than a side length of the side of the reference ground substrate in the polarization direction.

In an embodiment of the present invention, the cross-sectional shape of the top of the welding groove is set to be circular arc or triangular.

In an embodiment of the present invention, the radiation source substrate has a first copper-clad layer and a second copper-clad layer respectively disposed on two opposite sides of the radiation source substrate, wherein the reference ground substrate is provided with a metal layer, wherein the metal layer is flatly and conductively adhered to the radiation source, the second copper-clad layer is disposed on the radiation source, so that the first copper-clad layer of the radiation source substrate forms the radiation source and the metal layer of the reference ground substrate forms the reference ground.

In an embodiment of the present invention, the radiation source has a grounding point, wherein the grounding point is formed at a physical center of the radiation source, and wherein the radiation source is electrically connected to the grounding point in a metallized hole manner and grounded to the reference ground.

In an embodiment of the present invention, wherein the radiation source substrate is further provided with two pads, two of them the pad is covered with the correspondence the inner wall of the welding groove and electrically connected in the radiation source substrate the second covers the copper layer, then the pad warp the second covers the copper layer and is electrically connected in the metal layer of the reference ground substrate, work as with this the radiation source substrate in the welding groove warp the pad is welded fastening in during the shield cover, the shield cover in the welding arm electrically connected in the reference ground and grounded, in order to strengthen the electromagnetic shielding effect of a shielding space formed by the shield cover.

In an embodiment of the present invention, wherein the shield cover is provided with two mounting grooves, wherein two mounting arms are formed at two ends of the reference ground substrate in an extending manner, wherein two mounting arms are disposed at positions of the mounting grooves protruding from the shield cover to be perpendicular to the direction of the reference ground substrate is abutted against the state of the shield cover, and then the shield cover is welded to the radiation source substrate, the reference ground substrate is clamped and fixed to the shield cover and the state between the radiation source substrates.

In an embodiment of the present invention, the shielding cover is respectively extended from the mounting groove to form at least one positioning post, wherein the mounting arm is correspondingly provided with at least one positioning hole, wherein the mounting arm is embedded in the positioning hole of the shielding cover.

In an embodiment of the present invention, the shielding cover extends from the cover edge to a position corresponding to the two welding grooves to form a welding arm, wherein the shielding cover is in a state of being abutted to the reference ground substrate via the welding arm is welded to the corresponding pad and is fixed to the radiation source substrate.

In an embodiment of the present invention, the 5.8GHz microwave detecting module further includes a circuit unit, wherein the circuit unit is disposed on a side of the ground reference substrate opposite to a side carrying the ground reference, and is accommodated in the shielding space formed by the shielding case, wherein the radiation source is electrically connected to the circuit unit through the feed point in a manner of metallized via hole.

In an embodiment of the present invention, the circuit unit includes an oscillating circuit and a mixer detector circuit, wherein the radiation source is electrically connected to the oscillating circuit through the metalized via hole at the feeding point, and the mixer detector circuit is electrically connected to the oscillating circuit.

In an embodiment of the present invention, it is assumed that the distance from the circuit unit to the bottom inner side surface of the shielding case is a parameter H1, wherein the numerical range of the parameter H1 is: h1 is more than or equal to 3.23mm, the thickness of the reference foundation plate tends to 0.5mm, the thickness of the radiation source foundation plate tends to 1.0mm, and the overall thickness of the 5.8GHz micro microwave detection module is a parameter H2, so that the numerical range of the parameter H2 meets the following requirements: h2 is not less than 4.0mm and not more than 8.0 mm.

In an embodiment of the present invention, the radiation source substrate has a first side, a second side opposite to the first side, a first polarization plane connecting the first side and the second side, and a second polarization plane opposite to the first polarization plane, wherein the ground reference substrate has a third side, a fourth side opposite to the third side, a third polarization plane connecting the third side and the fourth side, and a fourth polarization plane opposite to the third polarization plane, wherein the first side, the second side, the first polarization plane, and the second polarization plane of the radiation source substrate correspond to the third side, the fourth side, the third polarization plane, and the fourth polarization plane of the ground reference substrate respectively.

In an embodiment of the invention, the welding groove of the radiation source substrate is formed at the first side and the second side of the radiation source substrate.

In an embodiment of the present invention, the metal layer of the reference ground substrate extends to cover the third side, the fourth side, the third polarization surface and the fourth polarization surface of the reference ground substrate are wrapped with a metal, wherein the shielding cover is wrapped with the metal and is welded to the radiation source substrate in a wrapped state.

In an embodiment of the present invention, a side surface of the radiation source substrate corresponding to the first side surface and the second side surface is provided as an inner concave surface.

In an embodiment of the present invention, an end of the welding arm welded to the welding groove is bent to guide a flow direction of the solder.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1 is a perspective view of the 5.8GHz micro microwave detection module according to a preferred embodiment of the present invention.

Fig. 2 is an exploded view of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of the 5.8GHz microwave detection module according to the above preferred embodiment of the present invention.

Fig. 4 is a top view of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 5 is an assembly schematic diagram of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 6A is a perspective view of a first variant implementation of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 6B is a top view of a first variant implementation of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 7A is a perspective view of a second variant implementation of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Fig. 7B is a top view of a second variant implementation of the 5.8GHz micro microwave detection module according to the above preferred embodiment of the present invention.

Detailed Description

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

It will be understood by those skilled in the art that in the present disclosure, the terms "vertical," "horizontal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the specification and are not intended to indicate or imply that the referenced device or element must have the specified orientation, configuration, or operation in the specified orientation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 5 of the drawings, a 5.8GHz microwave detecting module 100 according to a preferred embodiment of the present invention is illustrated, wherein the 5.8GHz microwave detecting module 100 includes a radiation source substrate 10, a reference ground substrate 20 and a shielding case 30, wherein the size of the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30 is reduced to reduce the size of the 5.8GHz microwave detecting module 100 by adjusting the connection structure and the assembly manner among the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30, so that the present invention provides a small and stable 5.8GHz microwave detecting module 100.

Specifically, the radiation source substrate 10 carries a radiation source 101, the reference ground substrate 20 carries a reference ground 102, the reference ground 102 is attached to the radiation source substrate 10 in a state spaced apart from the radiation source 101 by the radiation source substrate 10, the radiation source 101 has a feeding point 1011, the feeding point 1011 is offset from a physical center point of the radiation source 101, a direction from the feeding point 1011 to the physical center point of the radiation source 101 is defined as a polarization direction of the radiation source 101, a straight line on a plane where the radiation source 101 is located where the physical center point of the radiation source 101 is defined as an energy balance line, and two welding grooves 13 are formed in a side position of the radiation source substrate 10 intersecting with the energy balance line; the shield case 30 is fixed to the radiation source substrate 10 in a state of being in contact with the reference ground substrate 20 by being welded to the corresponding welding groove 13, and if the welding of the radiation source substrate 10 between the welding groove 13 and the shield case 30 is formed by drag welding, the radiation source substrate 10, the reference ground substrate 20, and the shield case 30 are stably connected to each other by the welding fixation of the radiation source substrate 10 to the welding groove 13 and the shield case 30 in a state of being in contact with the radiation source substrate 10 and the shield case 30.

Specifically, in this embodiment of the present invention, wherein the shielding cover 30 is formed with two welding arms 31 corresponding to the welding grooves 13 extending from the cover edge thereof, wherein the shielding cover 30 is welded to the radiation source substrate 10 in a state of abutting against the reference ground substrate 20 in a manner that the welding arms 31 are welded to the corresponding welding grooves 13, the radiation source substrate 10, the reference ground substrate 20 and the shielding cover 30 are stably connected to each other via the welding fixation of the radiation source substrate 10 to the welding grooves 13 and the corresponding welding arms 31 of the shielding cover 30 in a state of abutting against the shielding cover 30.

More specifically, the radiation source substrate 10 has a first copper-clad layer 11 and a second copper-clad layer 12 respectively disposed on two opposite sides of the radiation source substrate 10; wherein the reference ground substrate 20 is provided with a metal layer 21, wherein the metal layer 21 is conductively attached to the second copper-clad layer 12 of the radiation source 101, so that the first copper-clad layer 11 of the radiation source substrate 10 forms the radiation source 101, and the metal layer 21 of the reference ground substrate 20 forms the reference ground 102, and then the reference ground 102 and the radiation source 101 are connected at intervals.

Further, the shielding cover 30 is provided with two mounting grooves 301, wherein two mounting arms 23 protruding the shielding cover 30 are correspondingly formed by extending two ends of the reference ground substrate 20, and the reference ground substrate 20 is abutted against the shielding cover 30 in a state that the mounting arms 23 protrude from the corresponding mounting grooves 301, so that when the shielding cover 30 is welded to the radiation source substrate 10, the reference ground substrate 20 is clamped and fixed between the shielding cover 30 and the radiation source substrate 10.

It can be understood that, in the case where the reference ground substrate 20 is abutted against the shield cover 30 in such a manner that the two mounting arms 23 are mounted on the shield cover 30, the radiation source substrate 10, the reference ground substrate 20, and the shield cover 30 can be stably connected to each other by welding the shield cover 30 to the radiation source substrate 10, that is, by welding and fixing the shield cover 30 and the radiation source substrate 10, in addition to the connection relationship between the reference ground substrate 20 and the radiation source substrate 10 and the shield cover 30. That is to say, the utility model discloses a miniature microwave detection module 100 of 5.8GHz can be in reference ground base plate 20 is laminated in radiation source base plate 10 with by the butt in on the basis of shield cover 30, through with shield cover 30 the welding arm 31 welds in corresponding the technology of welding groove 13 forms radiation source base plate 10, reference ground base plate 20 and the structure of stable connection between the shield cover 30 three has simplified the manufacturing process of miniature microwave detection module 100 of 5.8GHz is favorable to miniature microwave detection module 100 of 5.8 GHz's production.

It should be understood that, the reference ground substrate 20 may be supported on the shielding cover 30 in a manner flush with the cover edge of the shielding cover 30, and may also be supported on the shielding cover 30 in a manner sinking to the cover edge of the shielding cover 30, which is not limited by the present invention.

Further, in the preferred embodiment of the present invention, wherein the shielding cases 30 are respectively formed with at least one positioning post 32 extending from the mounting groove 301, wherein the mounting arms 23 of the reference ground substrate 20 are respectively correspondingly provided with at least one positioning hole 230, wherein the reference ground substrate 20 is embedded in the positioning post 32 of the shielding case 30 at the positioning hole 230, the reference ground substrate 20 is further fixed to the shielding case 30, so as to ensure the stability of the connection between the reference ground substrate 20 and the shielding case 30.

In particular, in some embodiments of the present invention, the positioning posts 32 are welded to the reference ground 102 at the positioning holes 230 to further form a reinforced fixation between the reference ground substrate 20 and the shielding can 30 while achieving the positioning of the reference ground substrate 20 to the shielding can 30, which is not limited by the present invention.

It can be understood that the structural stability and consistency of the 5.8GHz microwave detection module 100 are determined by the stable connection structure among the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30, and in the preferred embodiment of the present invention, the reference ground substrate 20 is embedded in the shielding case 30 at the positioning hole 230 and is attached to the radiation source substrate 10, wherein the radiation source substrate 10 and the reference ground substrate 20 are attached and welded to the shielding case 30, that is, the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30 form a direct fixed relationship therebetween, which is beneficial to ensuring the stability and consistency of the 5.8GHz microwave detection module 100.

It is worth mentioning that, the welding arm 31 of the shielding case 30 extends from the cover of the shielding case 30 in the direction toward the radiation source substrate 10, which is beneficial to increase the welding area between the shielding case 30 and the radiation source substrate 10, and is beneficial to improve the stability of the connection between the shielding case 30 and the radiation source substrate 10 while facilitating the welding operation.

It can be understood that, on the basis of the connection between the reference ground substrate 20 and the radiation source substrate 10 and the shielding case 30, the welding arms 31 of the shielding case 30 are welded to the corresponding welding grooves 13 of the radiation source substrate 10, so that the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30 can be stably connected. In other words, a structure in which the radiation source substrate 10, the ground reference substrate 20, and the shield cover 30 are stably connected to each other can be formed by fixing the shield cover 30 and the radiation source substrate 10, thereby simplifying the manufacturing process of the 5.8GHz micro-microwave detection module 100 while ensuring the stability of the 5.8GHz micro-microwave detection module 100, and facilitating the production of the 5.8GHz micro-microwave detection module 100.

It should be noted that, in the manufacturing process of the 5.8GHz micro microwave detection module 100, not only the stability of the connection among the radiation source substrate 10, the reference ground substrate 20 and the shielding case 30 may affect the performance of the 5.8GHz micro microwave detection module 100, but also the flatness of the connection between the radiation source substrate 10 and the reference ground substrate 20 may significantly affect the performance of the 5.8GHz micro microwave detection module 100. In other words, the flatness of the connection between the radiation source 101 and the reference ground 102 has a significant effect on the performance of the 5.8GHz micro-microwave detection module 100. Therefore, in order to ensure the performance of the 5.8GHz micro microwave detection module 100, the second copper-clad layer 12 of the radiation source substrate 10 is flatly adhered to the metal layer 21 of the ground reference substrate 20.

Alternatively, in some embodiments of the present invention, the radiation source substrate 10 and the reference ground substrate 20 are fixed to each other in a structure and process of a laminated board in a state that the second copper clad layer 12 of the radiation source substrate 10 is smoothly attached to the metal layer 21 of the reference ground substrate 20.

It is worth mentioning that, the radiation source substrate 10 and the ground reference substrate 20 are attached to each other and form a radiation gap 103 between the radiation source 101 and the ground reference 102. It is understood that the metal layer 21 of the reference ground substrate 20 and the second copper-clad layer 12 of the radiation source substrate 10 are conductively bonded and form a flat structure, so as to facilitate reducing the dielectric loss of the radiation gap 103 of the 5.8GHz micro-microwave detection module 100 and maintaining the consistency of the dielectric loss of the radiation gap 103.

Preferably, the second copper clad layer 12 of the radiation source substrate 10 and the metal layer 21 of the ground reference substrate 20 are directly fixed in a bare copper process. In some embodiments of the present invention, the second copper-clad layer 12 is directly fixed to the metal layer 21 by electric welding. In some embodiments of the present invention, the second copper-clad layer 12 is flatly disposed on the metal layer 21 of the reference ground substrate 20 by a mechanical fixing manner of a mechanical clamping structure.

In other words, the second copper-clad layer 12 of the radiation source substrate 10 and the metal layer 21 of the reference ground substrate 20 are attached and fixed in a direct contact manner without a surface treatment process step for forming an oxidation-resistant metal protection layer, wherein the second copper-clad layer 12 of the radiation source substrate 10 and the metal layer 21 of the reference ground substrate 20 in a bare copper state have good planarization characteristics and electrical conductivity, which is beneficial for reducing and stably maintaining the thickness of the radiation gap 103, and the dielectric loss of the medium in the radiation gap 103 can be reduced and stably maintained, which is further beneficial for reducing the dielectric loss of the radiation gap 103 and maintaining the consistency of the dielectric loss of the radiation gap 103, i.e. for maintaining the consistency of the impedance matching of the 5.8GHz microwave detection module 100. In addition, the quality factor of the 5.8GHz micro microwave detection module 100 in the working state is effectively improved in such a way, and specifically, the anti-interference performance of the 5.8GHz micro microwave detection module 100 is improved in a way of narrowing the working frequency bandwidth of the 5.8GHz micro microwave detection module 100.

It should be understood that, in the manufacturing process of the 5.8GHz microwave detection module 100 of the present invention, the welding of the shielding cover 30 to the radiation source substrate 10 does not affect the connection between the radiation source substrate 10 and the ground reference substrate 20, that is, the welding of the shielding cover 30 to the radiation source substrate 10 does not affect the flatness of the connection between the radiation source 101 and the ground reference 102. Specifically, in this preferred embodiment of the present invention, in which the radiation source substrate 10 has a portion extending to protrude from the reference ground substrate 20 in a direction perpendicular to the polarization direction, and the welding groove 13 of the radiation source substrate 10 is disposed at the portion of the radiation source substrate 10 extending to protrude from the reference ground substrate 20, when the shielding can 30 is welded to the welding groove 13 of the radiation source substrate 10, solder can be prevented from penetrating between the radiation source substrate 10 and the reference ground substrate 20 to avoid affecting flatness between the radiation source 101 and the reference ground 102, thereby facilitating to maintain uniformity of dielectric loss of the radiation gap 103 between the radiation source 101 and the reference ground 102.

In other words, in the preferred embodiment of the present invention, wherein the dimension of the side of the radiation source substrate 10 in the polarization direction of the radiation source 101 is set to correspond to the dimension of the side of the shielding cover 30 in the polarization direction of the radiation source 101 and is larger than the dimension of the side of the reference ground substrate 20 in the polarization direction of the radiation source 101, the welding position between the radiation source substrate 10 and the shielding cover 30 is far away from the position where the radiation source substrate 10 and the reference ground substrate 20 are attached, so as to avoid solder from penetrating between the radiation source substrate 10 and the reference ground substrate 20 and facilitate the welding of the shielding cover 30 to the radiation source substrate 10.

In addition, since the side length dimension of the side of the radiation source substrate 10 in the polarization direction of the radiation source 101 is set to be correspondingly identical to the side length dimension of the side of the shield case 30 in the polarization direction of the radiation source 101 and larger than the side length dimension of the side of the reference ground substrate 20 in the polarization direction of the radiation source 101, when the welding arm 31 of the shield case 30 is welded to the radiation source substrate 10, the welding arm 31 can fix the position of the radiation source substrate 10, so that the structural stability of the 5.8GHz micro-microwave detection module 100 can be ensured.

It is worth mentioning that, in some embodiments of the present invention, the present invention can also guide the flow direction of the soldering tin by adjusting the shape of the welding arm 31 of the shielding cover 30, such as to weld the welding arm 31 to the one end of the welding groove 13 is bent, so as to avoid the soldering tin from permeating into the radiation source substrate 10 and between the reference ground substrates 20, and further avoid affecting the flatness between the radiation source 101 and the reference ground 102. In other words, in an embodiment of the present invention, an end of the welding arm 31 of the shielding can 30 welded to the welding groove 13 is bent to guide a flow direction of the solder.

It should be understood that in some embodiments of the present invention, the structure of the fixed connection among the shield 30, the reference ground substrate 20 and the radiation source substrate 10 may also be formed by welding the shield 30 to the reference ground substrate 20 and the radiation source substrate 10, and specifically, wherein the dimensions of the sides of the reference ground substrate 20 and the radiation source substrate 10 in the polarization direction of the radiation source 101 are kept uniform, i.e. the width dimensions of the radiation source substrate 10 and the reference ground substrate 20 are kept uniform, wherein the reference ground substrate 20 is welded to the inner wall of the shielding cage 30, wherein the shielding cage 30 is extended to form the welding arm 31 to be welded to the radiation source substrate 10, thereby forming a state in which the shield can 30 is welded to the reference ground substrate 20 and the radiation source substrate 10. Or it can be understood that, by welding the shielding case 30 at one point, the stable structure of the 5.8GHz micro microwave detection module 100 is formed by the corresponding surfaces of the reference ground substrate 20 and the radiation source substrate 10, the manufacturing process of the 5.8GHz micro microwave detection module 100 can be simplified, and the production of the 5.8GHz micro microwave detection module 100 is facilitated. Therefore, it can be understood that the utility model discloses also can form through the trilateral mode of a little welding shield cover 30 medial surface, refer to the side of ground base plate 20 and the structure of fixed connection between the side three of radiation source base plate 10 also is favorable to simplifying the manufacturing process of 5.8GHz miniature microwave detection module 100.

Further, the 5.8GHz micro microwave detection module 100 comprises a circuit unit 40, wherein the circuit unit 40 is disposed on the side of the reference ground substrate 20 opposite to the side carrying the reference ground 102, and is accommodated in a shielding space 302 formed by the shielding case 30, wherein the radiation source 101 is conductively connected to the circuit unit 40 at the feeding point 1011, wherein the feeding point 1011 is fed when the circuit unit 40 is powered, wherein the radiation source 101 is excited to radiate microwaves outward, wherein the 5.8GHz microwave detection module 100 receives a reflected wave formed by the microwave reflected by at least one object, and outputting a detection signal based on a characteristic parameter, such as a frequency parameter or a phase parameter, between signals corresponding to the microwave and the reflected wave, wherein the detection signal is feedback of the motion of the object.

It is worth mentioning that the feeding point 1011 of the radiation source 101 forms an electrically conductive connection with the circuit unit 40 in the form of a metalized via, which is advantageous for simplifying the wiring structure between the radiation source 101 and the circuit unit 40.

Further, the circuit unit 40 includes an oscillating circuit 41 and a mixer-demodulator circuit 42, wherein the radiation source 101 is electrically connected to the oscillating circuit 41 at the feeding point 1011 by way of a metallized via, wherein the mixer-demodulator circuit 42 is electrically connected to the oscillating circuit 41, wherein when the oscillating circuit 41 is powered, the oscillating circuit 41 outputs an excitation signal, wherein the excitation signal feeds the radiation source 101 from the feeding point 1011, wherein the radiation source 101 and the ground reference 102 interact to radiate microwaves outwards, wherein the 5.8GHz micro-microwave detection module 100 receives the reflected waves formed by the reflected microwaves, wherein the mixer-demodulator circuit 42 outputs the detection signal based on the frequency difference between the microwaves and the reflected waves, based on the doppler effect principle, the detection signal is feedback of the motion of the object.

In particular, in the preferred embodiment of the present invention, wherein the shielding cover 30 is welded to the radiation source substrate 10 in a state of wrapping the side surface of the reference ground substrate 20, and the shielding space 302 is formed at the side of the reference ground substrate 20 where the circuit unit 40 is disposed, the circuit unit 40 is accommodated in the shielding space 302, so as to allow the circuit unit 40 to work in the shielding space 302 without being interfered by the outside.

It is worth mentioning that, as shown in fig. 2 and 3, the two mounting arms 23 of the ground reference substrate 20 are electrically connected to the oscillation circuit 41 of the circuit unit 40 and have at least three soldering terminals 231 to allow the oscillation circuit 41 of the 5.8GHz micro-microwave detection module 100 to be electrically connected to an external circuit. It should be understood that, in some embodiments of the present invention, the mounting arm 23 may have four or more than four of the welding terminals 231, and the present invention is not limited to the number of the welding terminals 231. In addition, the number of the solder terminals 231 of the two mounting arms 23 may be the same or different, and the present invention is not limited thereto.

It can be understood that, in which the solder terminal 231 is disposed in the length direction of the reference ground 102, the solder terminal 231 can be equivalent to the reference ground 102, so that the size requirement of the reference ground 102 in the length direction of the reference ground 102 is reduced, and the size of the reference ground 102 in the length direction of the reference ground 102 is reduced, thereby reducing the size of the 5.8GHz micro microwave detection module 100.

Further wherein the radiation source substrate 10 has a first side 14, a second side 15 opposite to the first side 14, a first polarization plane 16 connecting the first side 14 and the second side 15, and a second polarization plane 17 opposite to the first polarization plane 16, wherein the ground reference substrate 20 has a third side 201, a fourth side 202 opposite to the third side 201, a third polarization plane 203 connecting the third side 201 and the fourth side 202, a fourth polarization plane 204 opposite to the third polarization plane 203, wherein the first side 14, the second side 15, the first polarization plane 16 and the second polarization plane 17 of the radiation source substrate 10 correspond to the third side 201, the fourth side 202, the third polarization plane 203 and the fourth polarization plane 204 of the reference ground substrate 20, respectively.

It is worth mentioning that, the welding groove 13 of the radiation source substrate 10 is formed on the first side 14 and the second side 15 of the radiation source substrate 10.

It is also worth mentioning that the metal layer 21 of the reference ground substrate 20 extends to cover at least one of the third side surface 201, the fourth side surface 202, the third polarization surface 203 and the fourth polarization surface 204 of the reference ground substrate 20.

Preferably, in the preferred embodiment of the present invention, the metal layer 21 of the reference ground substrate 20 extends to cover the third side 201, the fourth side 202, the third polarization surface 203 and the fourth polarization surface 204 of the reference ground substrate 20, so that the reference ground substrate 20 forms a metal edge 22, wherein the shielding cover 30 is preferably welded to the radiation source substrate 10 in a state of wrapping the metal edge 22 of the reference ground substrate 20, that is, the shielding cover 30 is welded to the radiation source substrate 10 in a state of wrapping the side surface of the reference ground substrate 20, so as to shield the plate edge radiation of the reference ground substrate 20, which is beneficial to improve the stability of the operation of the 5.8GHz microwave detection module 100.

It is understood that, in the case that the shielding case 30 is welded to the radiation source substrate 10 in a manner of wrapping the metal covering 22 of the reference ground substrate 20, the reference ground substrate 20 does not need to reserve a space for installing the shielding case 30, so as to facilitate the size reduction of the reference ground substrate 20, and thus facilitate the miniaturized configuration of the 5.8GHz micro microwave detection module 100.

It should also be mentioned that, if the shielding cover 30 is welded to the radiation source substrate 10 in a manner of wrapping the metal covering edge 22 of the reference ground substrate 20, the reference ground substrate 20 is pressed against the shielding cover 30 in a state of sinking to the cover edge of the shielding cover 30, which is beneficial to reducing the thickness of the 5.8GHz microwave detecting module 100, so as to facilitate the miniaturization of the 5.8GHz microwave detecting module 100. Therefore, in some embodiments of the present invention, the detection performance of the 5.8GHz micro microwave detection module 100 can be ensured by adjusting the reference ground plate 20 to the sinking distance of the shielding cover 30 to adjust the thickness of the 5.8GHz micro microwave detection module 100, which is advantageous for the 5.8GHz micro microwave detection module 100 to be thinned and thinned, thereby being advantageous for the expansion of the application range of the 5.8GHz micro microwave detection module 100.

In addition, it is worth mentioning that the shielding cover 30 covers and shields the metal covering edge 22 of the reference ground substrate 20, so as to shield radiation of a plate edge of the reference ground substrate 20, which is beneficial to improving the working stability of the 5.8GHz micro microwave detection module 100.

It should be understood that, since the reference ground substrate 20 is clamped and fixed between the shielding cover 30 and the radiation source substrate 10 in a manner of being abutted against the shielding cover 30, the stability of the connection between the reference ground substrate 20 and the shielding cover 30 is not affected even though there is no connection relationship between the metal rim 22 of the reference ground substrate 20 and the shielding cover 30, however, in some embodiments of the present invention, in order to further improve the stability of the connection between the reference ground substrate 20 and the shielding cover 30, the shielding cover 30 may be further fixedly connected to the reference ground substrate 20 in a manner that the inner wall thereof is welded to the metal rim 22 of the reference ground substrate 20. Optionally, the inner wall of the shielding cover 30 may also be formed by attaching the metal covering 22 of the reference ground substrate 20 and damping the contact surface between the two to form the state that the shielding cover 30 is stably fixed to the reference ground substrate 20, and the present invention is not limited to the manner in which the shielding cover 30 and the metal covering 22 of the reference ground substrate 20 form the connection.

In particular, in this preferred embodiment of the present invention, wherein two side surfaces of the radiation source 101 corresponding to the first side surface 14 and the second side surface 15 of the radiation source substrate 10 are provided as concave inner surfaces, wherein two side surfaces of the radiation source 101 corresponding to the first polarization surface 16 and the second polarization surface 17 of the radiation source substrate 10 are provided as flat surfaces, a portion of the reference ground 102 corresponding to the concave inner portion of the radiation source 101 can be coupled with the concave inner surface of the radiation source 101 to reduce the size requirement of the reference ground 102 in the width direction of the radiation source 101, so as to facilitate reducing the size of the reference ground 102 and the reference ground substrate 20 in the width direction of the radiation source 101, thereby facilitating reducing the size of the 5.8GHz microwave detection module 100.

It should be understood that, in some embodiments of the present invention, the shape of the side surface of the radiation source 101 corresponding to the first side surface 14 and the second side surface 15 of the radiation source substrate 10 may be set to other shapes, such as a planar shape, a tooth-like shape, etc., that is, the shape of the radiation source 101 may be set to a double-kidney shape, a square shape, a circular shape, an irregular shape, etc., that is, the specific embodiments of the radiation source substrate 10 and the radiation source 101 are various and cannot be a limitation to the content and scope of the 5.8GHz microwave detection module 100.

It is worth mentioning that, as shown in fig. 4, the 5.8GHz microwave micro-detection module 100 operates in a 5.8GHz band, where a direction from the feeding point 1011 of the radiation source 101 to a physical center point of the radiation source 101 is defined as the polarization direction of the radiation source 101, and a side length of a side of the radiation source 101 passing through the polarization direction of the radiation source 101 is set as a parameter L1, where a value range of the parameter L1 is set as: 10.34mm L1 25.86mm, i.e. the value range of the parameter L1 lies between a quarter wavelength and a half wavelength, wherein the side length of the side of the radiation source 101 in the direction perpendicular to the polarization direction of the radiation source 101 is assumed to be a parameter L2, wherein the value range of the parameter L2 is set to: l2 is more than or equal to 10.34mm and less than or equal to 25.86mm, that is, the value range of the parameter L2 is between a quarter wavelength and a half wavelength, so as to ensure that the 5.8GHz micro microwave detection module 100 can have a good detection effect.

Preferably, the parameter L1 is approximately 12.93mm, and the parameter L2 is approximately 12.93mm, which corresponds to the best detection effect of the 5.8GHz micro microwave detection module 100.

It should be understood that, in the description of the present invention given above and in the following numerical definition, the understanding of "tend" should be understood as having a margin of error of ± 10%, as the preceding description of the parameter L1 tending to 12.93mm corresponding to the side length of the side of the radiation source 101 in the polarization direction of the radiation source 101 should be understood as: a preferred value range of the parameter L1 is in the range 11.64mm-14.22mm, and a description that the parameter L2 for the side length of the side of the radiation source 101 in the direction perpendicular to the polarization direction of the radiation source 101 is towards 12.93mm should be understood as: the preferred value range of the parameter L2 is in the range of 11.64mm-14.22mm, i.e. "tend" in the description of the present invention is a description with a definite error range.

It can be understood that, in the case where the welding terminal 231 is arranged in the polarization direction of the radiation source 101, the area of the reference ground 102 can be equivalently increased while facilitating the output and output of signals by the 5.8GHz micro-microwave detection module 100, so as to ensure good working performance of the 5.8GHz micro-microwave detection module 100 in the case where the 5.8GHz micro-microwave detection module 100 can be miniaturized.

It is worth mentioning that the distance from the circuit unit 40 to the inner side surface of the bottom of the shielding case 30 is set as the parameter H1, that is, the parameter corresponding to the internal hollow height of the shielding case 30 is set as the parameter H1, wherein the value range of the parameter H1 is set as: h1 is 3.23mm or more, that is, the parameter H1 is set to one sixteenth wavelength or more. That is, when the reference ground substrate 20 is supported by the shield cover 30 in a manner of sinking to the cover edge of the shield cover 30, it is necessary to satisfy: the numerical range of the parameter H1 corresponding to the distance from the circuit unit 40 disposed on the back surface of the reference ground substrate 20 to the inner side surface of the bottom of the shield case 30 satisfies: h1 is larger than or equal to 3.23mm, so as to reduce the repeated reflection of the microwave radiated by the 5.8GHz micro microwave detection module 100 in the shielding space 302 formed by the shielding case 30, thereby ensuring the stability of the operation of the 5.8GHz micro microwave detection module 100.

It is understood that, the overall thickness of the 5.8GHz microwave detection module 100 includes the thickness of the shielding case 30, the distance from the circuit unit 40 to the bottom inner side of the shielding case 30, the thickness of the reference ground substrate 20 and the thickness of the radiation source substrate 10, wherein the 5.8GHz microwave detection module 100 is configured to operate in the 5.8GHz band, the thickness of the reference ground substrate 20 tends to be 0.5mm, wherein the thickness of the radiation source substrate 10 tends to be 1.0mm, and wherein the overall thickness of the 5.8GHz microwave detection module 100 is set as the parameter H2, the numerical range of the parameter H2 satisfies: h2 is not less than 4.0mm and not more than 8.0 mm.

It is worth mentioning that the description wherein the thickness of the reference ground substrate 20 tends to be 0.5mm should be understood as follows: the thickness of the reference ground substrate 20 preferably ranges from 0.45mm to 0.55mm, wherein the description of the thickness of the radiation source substrate 10 tending to 1.0mm should be understood as: the thickness of the radiation source substrate 10 is preferably in the range of 0.90mm to 1.10mm, i.e. "tend" in the description of the present invention is a description with a definite error range.

Further, it is worth mentioning that the thickness of the radiation source substrate 10 ranges from 0.4mm to 1.2mm, and the thickness of the reference substrate 20 ranges from 0.25mm to 1.0mm, which is not limited by the present invention.

In particular, in order to ensure a stable structure and good operation performance of the 5.8GHz micro microwave detection module 100, the thickness of the shielding case 30 of the 5.8GHz micro microwave detection module 100 is preferably set to 0.25mm, wherein the parameter corresponding to the internal hollow height of the shielding case 30 is set to be equal to or greater than 3.2mm, that is, the value range of the parameter H1 satisfies: h1 is more than or equal to 3.2mm, wherein the thickness of the reference ground substrate 20 is preferably set to 0.5mm, so as to be able to compromise the structural stability of the 5.8GHz micro microwave detection module 100 and reduce the microwave radiation path of the 5.8GHz micro microwave detection module 100; wherein the thickness of the radiation source substrate 10 is preferably set to 1mm to enable the 5.8GHz micro-microwave detection module 100 to have a better radiation angle and reduce the loss of the 5.8GHz micro-microwave detection module 100, and therefore, the parameter H2 corresponding to the overall thickness of the 5.8GHz micro-microwave detection module 100 is preferably set to 5 mm.

It is worth mentioning that, when two side faces of the radiation source 101 corresponding to the first side face 14 and the second side face 15 of the radiation source substrate 10 are set as the inner concave faces, a side length of a side of the inner concave face of the radiation source 101 is set as a parameter L3, wherein the parameter L3 is set as the parameter L2 or more.

It is further worth mentioning that, the radiation source 101 and the reference ground 102 have a preset distance in the polarization direction of the radiation source 101, wherein the preset distance is a parameter L4, wherein the value range of the parameter L4 is set as: l4 is more than or equal to 3.23mm, that is, the parameter L4 is set to be more than or equal to one sixteenth wavelength, so as to ensure the uniformity of the radiation area of the reference ground 102 and the sensing distance of the 5.8GHz micro microwave detection module 100 in the radiation direction. Further, let a side length of the side of the reference ground 102 in the polarization direction be a parameter L5, wherein a numerical range of the parameter L5 is set as: l5 is more than or equal to 6.47mm, namely the parameter L5 is set to be more than or equal to one eighth wavelength, so as to ensure the uniformity of the radiation area of the reference ground 102 and the sensing distance of the 5.8GHz micro microwave detection module 100 in the radiation direction.

It is understood that, in order to ensure the uniformity of the sensing distance of the radiation area and the radiation direction of the reference ground 102, it is preferable that the parameter L4 is set to be approximately 4.5mm, and the parameter L5 is set to be approximately 9 mm.

It is worth mentioning that, in the practical production process of the 5.8GHz microwave detection module 100 of the present invention, due to the process problem of the circuit board, wherein the corner of the reference ground substrate 20 is drilled to form a corner gap, therefore, in a modified embodiment of the present invention, as shown in fig. 6A and 6B, in order to prevent the 5.8GHz microwave detection module 100 from radiating microwaves from the corner gap, wherein along the polarization direction, the dimension of the radiation source substrate 10 is set to be consistent with the dimension of the shielding case 30, the radiation source substrate 10 can cover the corner gap of the reference ground substrate 20, so as to enable the circuit unit 40 disposed on the reference ground substrate 20 to be completely shielded by the shielding space 302 formed by the shielding case 30, thereby preventing the detection module 100 from radiating second harmonic and third harmonic waves from the corner gap, the working stability of the 5.8GHz micro microwave detection module 100 can be ensured.

In particular, since in this preferred embodiment of the present invention, the 5.8GHz micro microwave detection module 100 is configured to operate in the 5.8GHz band, the dimension of the radiation source substrate 10 in the direction of the energy balance line is configured to be consistent with the maximum dimension of the radiation source 101 corresponding to the parameter L1 and preferably tends to 13mm, wherein the dimension of the radiation source substrate 10 in the polarization direction is configured to be a parameter L6, wherein the parameter L6 tends to 16 mm.

Further, wherein the radiation source substrate 10 is further provided with two bonding pads 1013, wherein the bonding pads 1013 are covered with the corresponding soldering grooves 13 and are electrically connected to the second copper-clad layer 12, the bonding pads 1013 are electrically connected to the reference ground 102 via the second copper-clad layer 12, and the shielding can 30 is soldered to the bonding pads 1013 and is electrically connected to the reference ground 102, which is beneficial to enhance the electromagnetic shielding effect of the shielding space 302 formed by the shielding can 30.

It can be understood that, in the case that the soldering groove 13 is formed on the energy balance line of the radiation source 101, when the shielding can 30 is soldered to the soldering land 1013, the connection between the shielding can 30 and the radiation source substrate 10 does not affect the operation of the radiation source 101, which is beneficial to ensuring the stability and consistency of the 5.8GHz microwave detection module 100.

It should be understood that the specific number and shape of the welding grooves 13 therein are not limited. Preferably, in the preferred embodiment of the present invention, wherein the inner wall of the welding groove 13 is configured as a curved surface, that is, the top cross-sectional shape of the welding groove 13 is configured as a circular arc, and wherein the shape of the welding pad 1013 is configured to be consistent with the shape of the welding groove 13, it is advantageous to increase the welding area based on a certain welding spot size, so as to obtain stronger welding strength and smaller welding spot size when welding the welding pad 1013 and the metal layer 21 of the reference ground substrate 20 by spot welding. In addition, it is advantageous to obtain stronger welding strength and smaller welding spot size when welding the welding arm 31 of the shield case 30 to the welding pad 1013 by spot welding.

It is worth mentioning that, the welding groove 13 and the bonding pad 1013 may be implemented in other shapes, for example, in a modified embodiment of the above preferred implementation of the present invention, as shown in fig. 7A and 7B, wherein the welding groove 13 is configured in a triangular prism shape, that is, the cross-sectional shape of the top of the welding groove 13 is a triangular shape, which is beneficial to suppress the microwave radiation of the 5.8GHz micro microwave detection module 100 along the radiation source 101 to the welding groove 13, and correspondingly suppresses the energy of the minor lobe of the microwave beam radiated by the 5.8GHz micro microwave detection module 100, thereby being beneficial to improve the anti-interference capability of the 5.8GHz micro microwave detection module 100.

Alternatively, the present invention may adopt a laser welding process to weld the bonding pad 1013 and the metal layer 21 of the ground reference substrate 20 in a spot welding manner. Due to the high efficiency of the laser welding process, the process steps of welding and fixing the second copper-clad layer 12 of the radiation source substrate 10 to the metal layer 21 of the reference ground substrate 20 are shortened, which is beneficial to shortening the period of manufacturing the 5.8GHz micro-microwave detection module 100, so as to further be beneficial to maintaining the first copper-clad layer 11 and the second copper-clad layer 12 of the radiation source substrate 10 and the metal layer 21 of the reference ground substrate 20 of the bare copper process in the manufacturing period of the 5.8GHz micro-microwave detection module 100 not to be oxidized. And, due to the consistency and stability of the laser welding process, the welding of the bonding pad 1013 and the metal layer 21 of the reference ground substrate 20 by the laser welding process in a spot welding manner is beneficial to maintain the stable and consistent conductive fixation of the second copper-clad layer 12 of the radiation source substrate 10 and the metal layer 21 of the reference ground substrate 20.

Further, the radiation source 101 further has a grounding point 1012, wherein the grounding point 1012 is formed at a physical center point of the radiation source 101 and is electrically connected to the second copper-clad layer 12 of the radiation source 101 in a manner of a metallized via, and then the grounding point 1012 is electrically connected to the reference ground 102 through the second copper-clad layer 12 and is grounded, so as to reduce the impedance of the 5.8GHz micro microwave detection module 100, thereby improving the quality factor (i.e., Q value) of the 5.8GHz micro microwave detection module 100, and being beneficial to improving the anti-interference capability of the 5.8GHz micro microwave detection module 100.

It can be understood that, since the grounding point 1012 of the radiation source 101 is formed at the physical central point of the radiation source 101, the physical central point of the radiation source 101 is grounded to facilitate suppression of radiation energy of the 5.8GHz micro microwave detection module 100 in a radiation direction from the radiation source 101 to the reference ground 102, that is, to facilitate suppression of a minor lobe induction distance of a microwave beam radiated by the 5.8GHz micro microwave detection module 100, which is correspondingly beneficial to improving the anti-interference capability of the 5.8GHz micro microwave detection module 100.

In addition, the grounding point 1012 is formed at the physical center point of the radiation source 101 in a manner of a metalized via, so as to reduce the impedance of the 5.8GHz microwave detection module 100, and simultaneously, the current density distribution of the radiation source 101 when the feeding point 1011 is fed is favorably maintained, thereby being favorable for ensuring the radiation gain of the 5.8GHz microwave detection module 100.

It is worth mentioning that, in some embodiments of the present invention, the grounding point 1012 of the radiation source 101 may also be electrically connected to the ground potential of the oscillating circuit 41 by means of a metalized via hole to be grounded, which is not limited by the present invention.

It can be understood that 5.8GHz miniature microwave detection module 100 has the small volume and is consequently applicable to various application scenes, if be applied to electrical equipment such as lamps and lanterns, air conditioner, (window) curtain, TV to the realization is to electrical equipment's intelligent control, the utility model discloses it is right 5.8GHz miniature microwave detection module 100's application does not make the restriction.

It can also be understood that the utility model discloses the ground reference base plate 20 is laminated in radiation source base plate 10 and by the butt in on the basis of shield cover 30, through will shield cover 30 welded fastening in radiation source base plate 10's mode forms radiation source base plate 10 reference ground base plate 20 and the stable connection's between the shield cover 30 three relation has simplified 5.8GHz miniature microwave detection module 100's manufacturing process is favorable to shortening 5.8GHz miniature microwave detection module 100's production cycle corresponds and is favorable to reducing 5.8GHz miniature microwave detection module 100's manufacturing cost. In addition, the manufacturing process of the 5.8GHz micro microwave detection module 100 is simplified, and meanwhile, the stability and consistency of the 5.8GHz micro microwave detection module 100 can be guaranteed.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims (21)

1. A 5.8GHz microwave detection module, comprising:

a reference ground substrate, wherein the reference ground substrate carries a reference ground;

a radiation source substrate, wherein the radiation source substrate carries a radiation source, wherein the ground reference is attached to the radiation source substrate in a state spaced apart from the radiation source by the radiation source substrate, wherein the radiation source has a feed point, wherein the feed point is offset from a physical center point of the radiation source, wherein the direction defining the feeding point to the physical center point of the radiation source is the polarization direction of the radiation source, wherein a straight line defining a physical center point of the radiation source in the direction perpendicular to the polarization direction of the radiation source is an energy balance line, wherein the side length of the side of the radiation source passing through the polarization direction of the radiation source is set as a parameter L1, wherein the side length of the side of the radiation source passing through the energy balance line is a parameter L2, wherein the numerical range of the parameter L1 is set as: 10.34mm L1 25.86mm, wherein the value range of the parameter L2 is set as: l2 is more than or equal to 10.34mm and less than or equal to 25.86mm, wherein the radiation source substrate is provided with two welding grooves at the side position passing through the energy balance line; and

and the shielding cover is fixed on the radiation source substrate in a mode of being welded in the corresponding welding groove in a state of abutting against the reference ground substrate, and then the radiation source substrate, the reference ground substrate and the shielding cover are stably connected through welding and fixing of the radiation source substrate in the welding groove and the shielding cover in a state of abutting against the reference ground substrate.

2. The 5.8GHz micro microwave detection module of claim 1 wherein the parameter L1 is trending to 12.93mm, wherein the parameter L2 is trending to 12.93 mm.

3. The 5.8GHz microwave micro-detection module of claim 1, wherein the radiation source and the reference ground have a predetermined distance in the polarization direction of the radiation source, wherein the predetermined distance is a parameter L4, wherein the value range of the parameter L4 is set as: l4 is more than or equal to 3.23 mm.

4. The 5.8GHz micro microwave detection module of claim 3, wherein the parameter L4 is trending to 4.5 mm.

5. The 5.8GHz micro-microwave detection module of claim 1, wherein let a side length of the side of the reference ground in the polarization direction of the radiation source be a parameter L5, wherein a value range of the parameter L5 is set as: l5 is more than or equal to 6.47 mm.

6. The 5.8GHz miniature microwave detection module of claim 1 wherein along the poling direction the dimension of the radiation source substrate is set to coincide with the dimension of the shield, wherein the dimension of the radiation source substrate along the poling direction is set to a parameter L6, wherein the parameter L6 is approximately 16 mm.

7. The 5.8GHz micro-microwave detection module of claim 1, wherein a side length dimension of the side of the radiation source substrate in the polarization direction is set to correspond with a side length dimension of the side of the shield case in the polarization direction and to be larger than a side length dimension of the side of the reference ground substrate in the polarization direction.

8. The 5.8GHz micro-microwave detection module according to claim 1, wherein the top cross-sectional shape of the soldering groove is configured as a circular arc or a triangle.

9. The 5.8GHz micro microwave detection module according to any of claims 1-8, wherein the radiation source substrate has a first copper-clad layer and a second copper-clad layer disposed on opposite sides of the radiation source substrate, respectively, wherein the ground reference substrate is provided with a metal layer, wherein the metal layer is flatly and electrically attached to the second copper-clad layer of the radiation source, such that the first copper-clad layer of the radiation source substrate forms the radiation source, and the metal layer of the ground reference substrate forms the ground reference.

10. The 5.8GHz microwave micro-detection module of claim 9 wherein the radiation source has a grounding point, wherein the grounding point is formed at a physical center of the radiation source, wherein the radiation source is grounded by being electrically connected to the ground reference by way of a metallized hole.

11. The 5.8GHz microwave detection module according to claim 9, wherein the radiation source substrate is further provided with two pads, wherein the two pads are covered on the inner wall of the corresponding soldering groove and are electrically connected to the second copper-clad layer of the radiation source substrate, and the pads are electrically connected to the metal layer of the ground reference substrate through the second copper-clad layer, so that when the radiation source substrate is soldered and fixed to the shield cover through the pads in the soldering groove, the shield cover is electrically connected to the ground reference and grounded, thereby, the electromagnetic shielding effect of a shielding space formed by the shield cover can be enhanced.

12. The 5.8GHz microwave detection module according to claim 11, wherein the shield cover is provided with two mounting grooves, wherein two mounting arms are formed by extending two ends of the ground reference substrate, wherein the two mounting arms protrude from the shield cover at positions of the mounting grooves, so as to form a state in which the ground reference substrate is abutted against the shield cover in a direction perpendicular to the ground reference, and then form a state in which the ground reference substrate is clamped and fixed between the shield cover and the radiation source substrate when the shield cover is welded to the radiation source substrate.

13. A 5.8GHz microwave detection module according to claim 12, wherein said shielding case has a welding arm extending from a cover thereof at positions corresponding to said two welding grooves, respectively, wherein said shielding case is fixed to said radiation source substrate in an abutting state with said ground reference substrate by being welded to respective said pads via said welding arms.

14. The 5.8GHz micro-microwave detection module according to claim 13, wherein the shielding cases respectively extend from the mounting slots to form at least one positioning post, wherein the mounting arms of the ground reference substrate are respectively provided with at least one positioning hole, and wherein the mounting arms of the ground reference substrate are embedded in the positioning post of the shielding cases at the positioning hole.

15. The 5.8GHz microwave detection module according to claim 13, wherein the 5.8GHz microwave detection module further comprises a circuit unit, wherein the circuit unit is disposed on a side of the ground reference substrate opposite to a side carrying the ground reference and is accommodated in the shielding space formed by the shielding can, and wherein the radiation source is conductively connected to the circuit unit by the feed point in the form of a metalized via.

16. The 5.8GHz microwave micro-detection module of claim 15, wherein the circuit unit comprises an oscillator circuit and a mixer-detector circuit, wherein the radiation source is conductively coupled to the oscillator circuit at the feed point by way of a metallized via, wherein the mixer-detector circuit is electrically coupled to the oscillator circuit.

17. The 5.8GHz micro-microwave detection module according to claim 15, wherein the distance from the circuit unit to the inner side of the bottom of the shielding case is a parameter H1, wherein the parameter H1 has a value range of: h1 is more than or equal to 3.23mm, the thickness of the reference foundation plate tends to 0.5mm, the thickness of the radiation source foundation plate tends to 1.0mm, and the overall thickness of the 5.8GHz micro microwave detection module is a parameter H2, so that the numerical range of the parameter H2 meets the following requirements: h2 is not less than 4.0mm and not more than 8.0 mm.

18. The 5.8GHz microwave detection module of claim 15 wherein the radiation source substrate has a first side, a second side opposite the first side, a first polarization plane connecting the first side and the second side, and a second polarization plane opposite the first polarization plane, wherein the ground reference substrate has a third side, a fourth side opposite to the third side, a third polarization plane connecting the third side and the fourth side, a fourth polarization plane opposite to the third polarization plane, wherein the first side surface, the second side surface, the first polarization surface and the second polarization surface of the radiation source substrate correspond to positions of the third side surface, the fourth side surface, the third polarization surface and the fourth polarization surface of the ground reference substrate, respectively.

19. The 5.8GHz micro microwave detection module of claim 18 wherein the solder slots of the radiation source substrate are formed in the first and second sides of the radiation source substrate.

20. The 5.8GHz micro-microwave detection module of claim 18, wherein the metal layer of the ground reference substrate extends over the third, fourth, third and fourth polarization surfaces of the ground reference substrate to form a metal border, wherein the shield is welded to the radiation source substrate in a state of wrapping the metal border.

21. The 5.8GHz micro microwave detection module of claim 18, wherein sides of the radiation source corresponding to the first and second sides of the radiation source substrate are configured as concave inner surfaces.

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