CN211150781U - Miniaturized microwave detection device - Google Patents

Abstract

The utility model discloses a miniaturized microwave detection device, wherein the miniaturized microwave detection device comprises a reference ground substrate and a radiation source substrate, wherein the ground reference substrate comprises a first substrate and a metal layer covered on the first substrate, wherein the metal layer forms a ground reference, wherein the radiation source substrate comprises a second substrate and a first copper clad layer and a second copper clad layer respectively held on opposite sides of the second substrate, wherein the first copper clad layer forms a radiation source having a feeding point, wherein the radiation source substrate is disposed on the metal layer of the ground reference substrate and forms a radiation gap between the metal layer and the first copper clad layer, wherein the width dimension of the reference ground substrate is kept consistent with the width dimension of the radiation source substrate, so that the miniaturized microwave detection device is miniaturized.

Description

Miniaturized microwave detection device

Technical Field

The utility model relates to a microwave detection field, in particular to miniaturized microwave detection device.

Background

The microwave detection device is applied to intelligent electrical equipment, is an important basis of the intelligent electrical equipment, and the quality of the microwave detection device directly influences the intelligent degree and the sensitivity of the intelligent electrical equipment.

Referring to fig. 1A and 1B, a microwave detecting device 100P of the prior art includes a radiation source 10P, a reference ground 20P, an oscillation circuit unit 30P, and a shield cover 40P, the radiation source 10P and the oscillation circuit unit 30P are respectively held on both sides of the reference ground 20P, the feeding point 11P of the radiation source 10P is electrically connected to the oscillation single-pass unit 30P, and the shield cover 40P and the oscillation single-pass unit 30P are disposed on the same side of the reference ground 20P. The microwave detection device 100P is attached to an electrical apparatus, and the microwave detection device 100P is communicably connected to the electrical apparatus. When the microwave excitation signal is connected to the radiation source 10P from the feeding point 11P of the radiation source 10P, the microwave detection device 100P radiates and detects microwaves toward the use space of the electrical device, the detected microwaves are reflected by a user in the use space to form reflected microwaves, and the microwave detection device 100P receives the reflected microwaves and obtains the motion state of the user in the use space according to the frequency or phase difference between the detected microwaves and the reflected microwaves. The working mode and the working state of the subsequent electrical equipment are timely adjusted according to the motion state of the user, so that intelligent and humanized services of the user are provided.

However, according to the structure of the microwave detecting device 100P in the related art, a long distance is required between each side surface of the ground reference 20P of the microwave detecting device 100P and each side surface of the radiation source 10P, so as to reserve a sufficient installation space for arranging the oscillating circuit 30P and installing the shielding case 40P. Such a structure makes the conventional microwave detection device 100P large in size, which is not favorable for subsequent use.

Specifically, in the conventional installation process, the microwave detection device 100P is installed on one side of the electrical equipment. However, since the microwave detection device 100P has a large volume, after the microwave detection device 100P is installed in an electrical apparatus, the microwave detection device 100P is exposed to the outside of the electrical apparatus, which is generally very obtrusive and not good for the overall appearance. Especially, the electrical device and the microwave detection device 100P are applied to the smart home field, which directly affects the decoration effect of the user using area and is not beneficial to ensuring the purchasing experience of the user.

The microwave detection device 100P may be installed inside an electric apparatus. Specifically, in the manufacturing process of the electrical device, an installation space is reserved for accommodating the microwave detection device 100P, and after the microwave detection device 100P is installed in the electrical device, the microwave detection device 100P radiates and detects microwaves and receives reflected echoes to the use space in a manner of being hidden inside the electrical device. Although the visual problem of the overall aesthetic appearance of the electrical equipment is solved in this way, the overall volume of the electrical equipment is increased due to the large volume of the microwave detection device 100P, which is not only disadvantageous to the trend of miniaturization of the electrical equipment, but also increases the manufacturing process and manufacturing cost of the electrical equipment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniaturized microwave detection device, wherein miniaturized microwave detection device volume is less, is favorable to saving installation space.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device has a reference ground substrate and a radiation source substrate, which are smaller than each other.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the ground-referenced substrate includes a metal layer and a first substrate, wherein cover in a first positive of the first substrate the metal layer forms a reference ground, wherein the radiation source substrate includes a second substrate and a first copper-clad layer, wherein cover in a second positive of the second substrate the first copper-clad layer forms a radiation source, wherein the radiation source with the reference ground is set up with interval so as to form a planar structure the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the radiation source has a feeding point, wherein the central point of the radiation source and the connecting line direction of the feeding point do the length of the radiation source, wherein the width parameter a of the radiation source satisfies λ/8 ≤ a ≤ λ/2, wherein λ is the wavelength of the detection microwave generated by the miniaturized microwave detecting device, so as to be favorable for reducing the radiation source with the size of the radiation source substrate.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the length parameter b of the radiation source satisfies λ/8 ≤ b ≤ λ/2, so as to ensure that the radiation source has a circumference of more than or equal to λ/2, thereby being beneficial to reducing the size of the radiation source while ensuring the gain of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the side of the radiation source along the length direction is set up in a bending manner, if set up by the indent, so as to be favorable to further reducing the size of the radiation source in the length direction, simultaneously ensure that the radiation source has a circumference of more than or equal to λ/2, thereby reducing the size of the radiation source while ensuring the radiation gain of the miniaturized microwave detecting device.

It is another object of the present invention to provide a miniaturized microwave detecting device and a method for manufacturing the same, wherein the longitudinal side of the radiation source is curved, such as being concave, so as to facilitate further reducing the longitudinal dimension of the radiation source and to facilitate reducing the dimension requirement for the reference ground in the longitudinal direction of the radiation source while allowing the miniaturized microwave detecting device to be reduced in size in a manner of reducing the longitudinal dimension of the reference ground in the radiation source.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the side of the radiation source along the length direction is concavely disposed, then the reference ground corresponding to the concave portion of the radiation source can be coupled with the side of the radiation source and the width direction of the radiation source reduces the size requirement of the reference ground, so as to be favorable for the width direction of the radiation source to be reduced the size of the reference ground and the reference ground, for example, the width direction of the radiation source keeps the width dimension of the radiation source consistent with the width dimension of the reference ground, thereby being favorable for reducing the size of the miniaturized microwave detecting device.

It is another object of the present invention to provide a miniaturized microwave detecting device and a method for manufacturing the same, in which the longitudinal sides of the radiation source are concavely provided, wherein the current density distribution of the side of the radiation source in the length direction is allowed to be adjusted based on the design of the concave size of the side of the radiation source in the length direction, while a reference ground corresponding to a concave part of the radiation source can be coupled to the side of the radiation source, i.e. the ratio of the coupling energies between the radiation source and the reference ground and the current density distribution and the electric field distribution of the radiation source allow to be adjusted based on the design of the concave size of the side of the radiation source in the length direction, thereby being beneficial to adjusting the electric field radiation intensity and the angle of the miniaturized microwave detection device in the width direction of the radiation source.

Another object of the present invention is to provide a miniaturized microwave detecting device and a method for manufacturing the same, in which a side of the radiation source in a length direction is concavely provided, wherein a current density distribution of the side of the radiation source in the length direction is adjusted based on a design of a concave shape and size of the side of the radiation source in the length direction, and a reference ground corresponding to a concave portion of the radiation source can be coupled to the side of the radiation source, i.e., a coupling energy ratio between the radiation source and the reference ground and a current density distribution and an electric field distribution of the radiation source are allowed to be adjusted based on a design of a concave shape and size of the side of the radiation source in the length direction, and a detection beam of the miniaturized microwave detecting device is allowed to be adapted to areas and sizes of different detection regions based on a design of a concave shape and size of the side of the radiation source in the length direction The shape is beneficial to improving the applicability of the miniaturized microwave detection device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the width of the reference ground substrate is the same as the width of the radiation source substrate, so that the miniaturized microwave detecting device is in the size minimization of the width direction of the radiation source, thereby being beneficial to reducing the volume of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein a preset distance exists between the radiation source and the reference ground in the length direction, specifically, in the direction from the physical center point of the radiation source to the feeding point, i.e. the initial polarization direction of the radiation source, the preset distance between the radiation source and the reference ground is defined as a parameter c 1; in the direction from the feeding point of the radiation source to the physical center point, i.e. the polarization direction of the radiation source, the preset distance between the radiation source and the reference ground is defined as a parameter c2, wherein the parameters c1 and c2 have the following value ranges: c1 ≧ λ/64 or c2 ≧ λ/64, such as to facilitate reducing the size of the reference ground and the reference ground plate in the length direction of the radiation source while securing the radiation gain of the miniaturized microwave detection device, thereby facilitating reducing the size of the miniaturized microwave detection device.

It is another object of the present invention to provide a miniaturized microwave detecting device, wherein in the initial polarization direction of the radiation source, the value range of the preset distance parameter c1 between the radiation source and the reference ground satisfies c1 ≧ λ/64, wherein in the polarization direction of the radiation source, the value range of the preset distance parameter c2 between the radiation source and the reference ground satisfies c2 ≦ λ/64, such that the size of the miniaturized microwave detecting device is reduced by reducing the preset distance between the radiation source and the reference ground in the polarization direction of the radiation source, such as in a manner that the polarization direction of the radiation source is kept coincident with the reference ground so that the values of the preset distance parameter c2 of the radiation source and the reference ground in the direction tend to zero, meanwhile, the radiation gain of the miniaturized microwave detection device is ensured by the structural basis that the radiation source and the preset distance parameter c1 of the reference ground in the initial polarization direction of the radiation source meet c1 ≧ lambda/64, so that the radiation source can generate the initial polarization direction when the feed point is fed, and radiate and detect microwaves interacting with the reference ground.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the ground reference substrate is disposed on the first front surface and further disposed with a plurality of solder terminals in the length direction of the ground reference, and the solder terminals are equivalent to the ground reference and the length direction of the ground reference reduces the size requirement of the ground reference, so as to facilitate the reduction of the length direction of the ground reference to facilitate the reduction of the size of the ground reference, thereby facilitating the reduction of the size of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the radiation source is grounded, then the impedance of the miniaturized microwave detecting device is reduced, so that the quality factor (i.e. Q value) of the miniaturized microwave detecting device is improved, thereby being favorable for improving the anti-interference performance of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the radiation source is derived from the physical central point of the radiation source is grounded to reduce the impedance of the miniaturized microwave detecting device, which is favorable for maintaining the radiation source is derived from the current density distribution when the feed point is fed, thereby being favorable for ensuring the radiation gain of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device is being reduced when referring to the size of the ground plate, reserve sufficient assembly area for setting up a resonant circuit unit and a mixing detection unit of the miniaturized microwave detecting device, and then ensure the normal operation of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device is being reduced when referring to the size of the ground plate, reserve sufficient assembly area for setting up a shield cover of the miniaturized microwave detecting device, and then reduce be favorable to the guarantee in the time of the size of the miniaturized microwave detecting device the anti-interference performance of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the ground reference plate the metal layer from first front extends to two at least sides of the ground reference plate, for fixing the sufficient assembly area has been created to the shield cover, in order to follow-up, the shield cover can through be welded in the mode of metal layer by cover in the ground reference plate is favorable to reducing miniaturized microwave detecting device's volume and guarantee miniaturized microwave detecting device's interference killing feature.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the oscillating circuit unit with the frequency mixing detection unit is set up in the first substrate, the installation of shield cover can not occupy the oscillating circuit unit with the installation area of frequency mixing detection unit, and then has ensured the oscillating circuit has sufficient assembly area.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device further includes that the second covers the copper layer, wherein the second covers the copper layer cover in the second back of second base plate, the second of radiation source base plate covers the copper layer and is smoothly attached in the ground reference base plate, in order to form the radiation source with the structural relation that is set up with referring to ground looks interval, and be favorable to reducing the dielectric loss of a radiation gap of miniaturized microwave detecting device and maintaining the dielectric loss's in radiation gap uniformity.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the first copper layer that covers is in a metallization hole electric connection that its physical center point is formed with the metallization via hole technology in the second covers the copper layer, so that cover the copper layer at the second and be attached smoothly in the ground reference base plate first openly during the metal layer, form the radiation is originated from its physical center point by electric connection in the ground reference and by the state of ground connection, be favorable to simplifying the ground connection line structure of radiation source with improve the uniformity and the stability of the ground connection line structure of radiation source.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device the second of the radiation source substrate covers the copper layer with the reference ground substrate the metal layer is directly fixed with bare copper technology, avoided in a radiation gap of the miniaturized microwave detecting device forms an anti-oxidant metal protection layer, improved the quality factor and the transmission receiving efficiency of the miniaturized microwave detecting device under operating condition are favorable for improving the gain and the sensitivity of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein in the manufacturing process of the miniaturized microwave detecting device, the process of forming the anti-oxidation metal protection layer through the surface treatment process is saved, which is favorable for reducing the manufacturing cost of the miniaturized microwave detecting device.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device the radiation source substrate is fixed in with the mode of side spot welding the reference ground substrate one side of metal level, and then ensured the radiation source substrate the second cover copper layer flat ground attach in the reference ground substrate the metal level.

Another object of the present invention is to provide a miniaturized microwave detecting device, wherein the miniaturized microwave detecting device the radiation source substrate is fixed in with the mode of side spot welding the reference ground substrate one side of metal level, and then be favorable to avoiding the reference ground substrate the metal level with the radiation source substrate the second covers the copper layer and is by oxidation.

According to an aspect of the utility model, the utility model provides a miniaturized microwave detection device, it includes:

the ground reference substrate comprises a first substrate and a metal layer covered on the first substrate; and

a radiation source substrate, wherein the radiation source substrate includes a second substrate and a first copper clad layer and a second copper clad layer respectively held at opposite sides of the second substrate, wherein the second copper clad layer of the radiation source substrate and the metal layer of the ground reference substrate are conductively attached such that the metal layer of the ground reference substrate forms a ground reference, the first copper clad layer of the radiation source substrate forms a radiation source, and a radiation gap is formed between the metal layer of the ground reference substrate and the first copper clad layer of the radiation source substrate, wherein the radiation source has a feeding point, wherein the feeding point is disposed offset from a physical center point of the radiation source, wherein a direction of a line connecting the physical center point of the radiation source and the feeding point is defined as a length direction of the radiation source and the radiation source substrate, the width direction of the reference ground substrate is defined to be in the same direction as the width direction of the radiation source substrate, wherein the width dimension of the reference ground substrate is consistent with the width dimension of the radiation source substrate.

According to an embodiment of the present invention, wherein the width of the radiation source is a parameter a, the numerical range of the parameter a is: and a is more than or equal to lambda/8 and less than or equal to lambda/2, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

According to an embodiment of the present invention, wherein the length of the radiation source is a parameter b, the numerical range of the parameter b is: b is more than or equal to lambda/8 and less than or equal to lambda/2, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

According to an embodiment of the present invention, there is a predetermined distance between the radiation source and the reference ground in the length direction of the radiation source, wherein in the direction from the physical center point of the radiation source to the feeding point, the predetermined distance between the radiation source and the reference ground is defined as a parameter c1, wherein in the direction from the feeding point of the radiation source to the physical center point, the predetermined distance between the radiation source and the reference ground is defined as a parameter c2, wherein the parameters c1, c2 satisfy the following numerical ranges: c1 is more than or equal to lambda/64 or c2 is more than or equal to lambda/64, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

According to an embodiment of the present invention, there is a predetermined distance between the radiation source and the reference ground in the length direction of the radiation source, wherein in the direction from the physical center point of the radiation source to the feeding point, the predetermined distance between the radiation source and the reference ground is defined as a parameter c1, wherein in the direction from the feeding point of the radiation source to the physical center point, the predetermined distance between the radiation source and the reference ground is defined as a parameter c2, wherein the parameters c1, c2 satisfy the following numerical ranges: c1 is more than or equal to lambda/64, and c2 is more than or equal to lambda/64, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

According to an embodiment of the invention, wherein in the direction of the feeding point of the radiation source towards a physical center point, the radiation source and the reference ground are kept in conformity such that the parameter c2 between the radiation source and the reference ground tends towards a zero value.

According to an embodiment of the present invention, wherein the ground reference substrate has a first polarization surface, a second polarization surface opposite to the first polarization surface, a first side surface and a second side surface opposite to the first side surface, wherein the second substrate of the radiation source substrate has a third polarization surface, a fourth polarization surface opposite to the third polarization surface, a third side surface and a fourth side surface opposite to the third side surface, wherein the third polarization surface and the fourth polarization surface are two side surfaces corresponding to two wide sides of the second substrate, the third side surface and the fourth side surface are two side surfaces corresponding to two long sides of the second substrate, wherein the third polarization surface is a side surface of the second substrate in a direction of a line connecting the physical center point of the radiation source to the feeding point, wherein the radiation source substrate is a substrate having the third polarization surface, The fourth, third and fourth polarization surfaces are held at one side of the reference ground substrate in a manner corresponding to the first, second, first and second polarization surfaces of the reference ground substrate, respectively, wherein a maximum distance between the first and second sides of the reference ground substrate is kept identical to a maximum distance between the third and fourth sides of the radiation source substrate in a width direction of the radiation source and the reference ground, that is, a width of the reference ground substrate is kept identical to a width of the radiation source substrate.

According to an embodiment of the invention, the radiation source is arranged to be recessed in a side of the second substrate corresponding to the third side and the fourth side of the second substrate.

According to the utility model discloses an embodiment, wherein the second base plate the third polarization face with the fourth polarization face is the plane, the third side with the fourth side is the indent curved surface, corresponding to of radiation source the third polarization face with the side of fourth polarization face is the plane, corresponding to of radiation source the third side with the side of fourth side is the indent curved surface.

According to the utility model discloses an embodiment, wherein the second base plate the third polarization face, the fourth polarization face, the third side and the fourth side are the plane, the radiation source correspond to the third side with the side of fourth side is the concave curved surface.

According to the utility model discloses an embodiment, wherein the maximum distance that the radiation source inwards caves in is a parameter d, parameter d's numerical range is: d is less than or equal to lambda/8, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

According to an embodiment of the present invention, wherein the third polarization surface, the fourth polarization surface, the third side and the fourth side of the second substrate are planes, the radiation source corresponds to the second substrate the third polarization surface, the fourth polarization surface, the third side and the side of the fourth side are planes.

According to the utility model discloses an embodiment, wherein the side of the radiation source corresponding to the second base plate the third side with the fourth side is inclined the indent with the plane state, and is corresponding the radiation source have with corresponding the third side with the both sides face of fourth side is the waist, with correspond the third polarization face with the both sides face of fourth polarization face is the trapezoidal shape of going up the bottom.

According to an embodiment of the invention, the side of the radiation source corresponding to the third side and the fourth side of the second substrate is indented in a tooth shape at intervals.

According to the utility model discloses an embodiment, wherein the radiation source correspond to the second base plate the third polarization face the fourth polarization face the third side and the both ends of each side of fourth side are with the plane state by the slope indent, corresponding the radiation source be with the radiation source correspond to the third polarization face the fourth polarization face the third side and the fourth side be the limit, and use the eight shape of face on the limit of the indent end of continuous both sides face.

According to an embodiment of the present invention, wherein a side of the radiation source corresponding to the third and fourth polarization surfaces of the second substrate is concavely disposed.

According to an embodiment of the present invention, wherein a side of the radiation source corresponding to the third polarization surface, the fourth polarization surface, the third side and the fourth side of the second substrate is a concave curved surface.

According to an embodiment of the present invention, wherein the side of the radiation source corresponding to the third, fourth, third and fourth polarization surfaces of the second substrate is indented at intervals.

According to an embodiment of the present invention, the ground reference substrate is further provided with a plurality of solder terminals on a side of the metal layer in the length direction of the ground reference, and the solder terminals can be equivalent to the ground reference and the size requirement for the ground reference is reduced in the length direction of the ground reference.

According to the utility model discloses an embodiment, miniaturized microwave detection device further includes a shield cover, wherein the shield cover quilt cover is located the reference ground base plate.

According to the utility model discloses an embodiment, wherein the reference ground base plate further includes a metal layer of borduring, wherein the metal layer of borduring cover in at least a part of two at least sides of first base plate, the shield cover is fixed in the metal layer of borduring.

According to the utility model discloses an embodiment, the shield cover is fixed in with being welded in the mode of metal bordure layer the reference foundation plate.

According to the utility model discloses an embodiment, metal bordure layer an organic whole extend in reference ground.

According to an embodiment of the present invention, wherein the second copper-clad layer of the radiation source substrate is smoothly attached to the metal layer of the reference ground substrate.

According to an embodiment of the present invention, wherein the radiation source substrate and the reference ground substrate are mutually fixed and present with a structure and a process of a laminate board the second copper-clad layer of the radiation source substrate is flatly attached to the state of the metal layer of the reference ground substrate.

According to an embodiment of the present invention, the radiation source substrate further includes at least two pads, the pad is disposed on the third side and the fourth side of the second substrate, the pad is electrically connected to the second copper-clad layer, the pad is welded to the metal layer of the reference ground substrate.

According to the utility model discloses an embodiment, wherein the radiation source base plate the second base plate has at least two welding grooves, the welding groove form respectively in the third side with the fourth side, the pad cover in the definition the inner wall in welding groove.

According to an embodiment of the present invention, wherein the second substrate of the radiation source substrate has at least two welding grooves, wherein the welding grooves are formed in the second substrate in the form of metallized holes by a metallized via process, and are located between the third side of the second substrate and the corresponding side of the radiation source, wherein the bonding pads cover the inner wall defining the welding grooves.

According to an embodiment of the present invention, wherein the miniaturized microwave detecting device further comprises an oscillating circuit unit and a mixing detection unit, wherein the oscillating circuit unit and the mixing detection unit are disposed on a first substrate of the reference ground substrate, wherein the radiation source is electrically coupled to the feeding point of the oscillating circuit unit and the mixing detection unit, and the reference ground is electrically connected to the ground potential of the oscillating circuit unit.

According to an embodiment of the present invention, the radiation source further comprises a ground point, wherein the radiation source is electrically connected to the ground potential of the oscillating circuit unit from the ground point.

According to an embodiment of the present invention, wherein the first copper-clad layer forming the radiation source is electrically connected to the second copper-clad layer at the grounding point through a metalized hole formed by a metalized via process, and the radiation source is electrically connected to the grounding point and grounded.

According to an embodiment of the invention, wherein the grounding point is located at a physical central point of the radiation source.

According to an embodiment of the present invention, wherein the miniaturized microwave detecting device further includes an oscillating circuit unit and a mixing detection unit, wherein the oscillating circuit and the mixing detection unit are disposed on a first substrate of the reference ground substrate and are accommodated in an accommodation space of the shielding case, wherein the radiation source is derived from the feeding point electrically coupled to the oscillating circuit unit and the mixing detection unit, and the reference ground is electrically connected to the ground potential of the oscillating circuit unit.

Drawings

Fig. 1A is a perspective view of a conventional microwave detection device.

Fig. 1B is a schematic sectional view of the conventional microwave detection device.

Fig. 2 is a schematic perspective view of a miniaturized microwave detecting device according to the present invention.

Fig. 3 is an exploded view of the miniaturized microwave detecting device according to the above preferred embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of the miniaturized microwave detecting device according to the above preferred embodiment of the present invention.

Fig. 5 is a schematic sectional view showing a partial structure of the miniaturized microwave detecting apparatus according to the above preferred embodiment of the present invention.

Fig. 6 is a schematic top view of the miniaturized microwave detecting device according to the above preferred embodiment of the present invention.

Fig. 7 is a schematic perspective view of the miniaturized microwave detecting device according to a modified embodiment of the above preferred embodiment of the present invention.

Fig. 8 is a schematic perspective view of a miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 9 is a schematic perspective view of a miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 10 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 11 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 12 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 13 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 14 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of the above preferred embodiment of the present invention.

Fig. 15 is a schematic perspective view of the miniaturized microwave detecting device according to another modified embodiment of 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 principles of the substrate defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions without departing from the spirit and scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "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 description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

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.

Referring to fig. 2 to 6 of the drawings, a miniaturized microwave detecting device 100 according to a preferred embodiment of the present invention will be described in the following description, wherein the miniaturized microwave detecting device 100 can be installed in an electrical apparatus, the miniaturized microwave detecting device 100 detects a motion state of a user in a usage space, and subsequently, the electrical apparatus timely adjusts a working mode and a working state according to a detection result of the miniaturized microwave detecting device 100, thereby providing a user with intelligent and humanized services. The specific implementation of the electrical device is not limited, for example, but not limited to, the electrical device may be implemented as one or a combination of multiple electronic devices such as a lamp, an air conditioner, a sound, a curtain, a notebook, and the like. It should be understood by those skilled in the art that the specific application of the miniaturized microwave detection device 100 is only exemplary and should not be construed as limiting the scope and content of the miniaturized microwave detection device 100 of the present invention.

It is worth mentioning that the miniaturized microwave detection device 100 has a small volume, saves an installation space, and is beneficial to miniaturization of the electrical equipment. Moreover, after the miniaturized microwave detection device 100 is installed on the electrical equipment, the miniaturized microwave detection device 100 can be hidden in the electrical equipment, and the overall aesthetic property is guaranteed. Even if the miniaturized microwave detecting device 100 is installed at the electrical equipment in such a manner as to be exposed to the electrical equipment, since the miniaturized microwave detecting device 100 has a small volume, the influence on the visual effect of the installation area is reduced.

Specifically, the miniaturized microwave detecting device 100 includes a reference ground 101 and a radiation source 102, wherein the radiation source 102 is spaced apart from the reference ground 101, and a radiation gap 103 is formed between the radiation source 102 and the reference ground. The radiation source 102 has a feed point 1020. The feeding point 1020 is offset from the physical center of the radiation source 102, and when a microwave excitation signal is coupled into the radiation source 102 from the feeding point 1020, the radiation source 102 of the miniaturized microwave detecting apparatus 100 interacts with the reference ground 101 to generate a detection microwave having an initial polarization direction for detecting the motion state of the user.

Further, the miniaturized microwave detecting device 100 includes a reference ground substrate 10 and a radiation source substrate 20, the radiation source substrate 20 is fixed on one side of the reference ground substrate 10, the reference ground 101 is formed on the reference ground substrate 10, the radiation source 102 is formed on the radiation source substrate 20, a connecting line direction of a physical center point of the radiation source 102 and the feeding point 1020 is defined as a length direction of the radiation source 102, a width direction of the reference ground substrate 10 is defined as a same direction as a width direction of the radiation source substrate 20, and particularly, a width dimension of the reference ground substrate 10 is consistent with a width dimension of the radiation source substrate 20. That is to say, compared with the existing microwave detecting device, the miniaturized microwave detecting device 100 of the present invention has the size of the reference ground substrate 10 reduced, and further the volume of the miniaturized microwave detecting device 100 is reduced.

It is worth mentioning that the definitions of the length and width of the radiation source 102 and the reference ground 101 only serve as directional limitations on the length and width, and do not constitute a limitation that the length dimension is larger than the width dimension, i.e. the definitions of the length and width of the radiation source 102 and the reference ground 101 do not constitute a limitation that the respective length dimension is larger than the width dimension.

The ground reference substrate 10 includes a first substrate 11 and a metal layer 12, wherein the metal layer 12 is disposed on the first substrate 11. Specifically, the first substrate 11 has a first polarization surface 110, a second polarization surface 120 opposite to the first polarization surface 110, a first side surface 130 connecting the first polarization surface 110 and the second polarization surface 120, a second side surface 140 opposite to the first side surface 130, a first front surface 150, and a first back surface 160 opposite to the first front surface 150, the metal layer 12 covers the first front surface 150, and the metal layer 12 forms the reference ground 101.

Specifically, the first polarization plane 110 and the second polarization plane 120 are two side surfaces of the first substrate 11 in a longitudinal direction of the reference ground 101, and correspondingly, the first side surface 130 and the second side surface 140 are two side surfaces of the first substrate 11 in a width direction of the reference ground 101. More specifically, the first polarization plane 110 is a side surface of the first substrate 11 in a connecting direction from a physical central point of the radiation source 102 to the feeding point 1020 (i.e., an initial polarization direction of the radiation source 102), and correspondingly, the second polarization plane 120 is a side surface of the first substrate 11 in a connecting direction from the feeding point 1020 to a physical central point of the radiation source 102 (i.e., a polarization direction of the radiation source 102). That is, the first polarization surface 110 and the second polarization surface 120 are two side surfaces corresponding to two wide sides of the first substrate 11, and the first side surface 130 and the second side surface 140 are two side surfaces corresponding to two long sides of the first substrate 11.

The radiation source substrate 20 includes a second substrate 21, a first copper-clad layer 22 and a second copper-clad layer 23, wherein the first copper-clad layer 22 and the second copper-clad layer 23 are respectively covered on two opposite surfaces of the second substrate 21. Specifically, the second substrate 21 has a third polarization surface 210, a fourth polarization surface 220 opposite to the third polarization surface 210, a third side surface 230 connected to the third polarization surface 210 and the fourth polarization surface 220, a fourth side surface 240 opposite to the third side surface 230, a second front surface 250, and a second back surface 260 opposite to the second front surface 250, and the first copper-clad layer 22 and the second copper-clad layer 23 are respectively covered on the second front surface 250 and the second back surface 260 of the second substrate 21. The first copper-clad layer 22 forms the radiation source 102, and the feeding point 1020 of the radiation source 102 is close to the third polarization plane 210 and far from the fourth polarization plane 220.

Specifically, the third polarization surface 210 and the fourth polarization surface 220 are two side surfaces corresponding to two wide sides of the second substrate 21, and the third side surface 230 and the fourth side surface 240 are two side surfaces corresponding to two long sides of the second substrate 21. That is, the third polarization surface 210 and the fourth polarization surface 220 are two side surfaces of the second substrate 21 in the length direction of the radiation source 102, the third side surface 230 and the fourth side surface 240 are two side surfaces of the second substrate 21 in the width direction of the radiation source 102, more specifically, the third polarization surface 210 is a side surface of the second substrate 21 in the line direction from the physical center point of the radiation source 102 to the feeding point 1020, and correspondingly, the fourth polarization surface 220 is a side surface of the second substrate 21 in the line direction from the feeding point 1020 to the physical center point of the radiation source 102.

The radiation source substrate 20 is held on one side of the ground reference substrate 10 in such a manner that the third polarization plane 210, the fourth polarization plane 220, the third side 230, and the fourth side 240 of the second substrate 21 correspond to the first polarization plane 110, the second polarization plane 120, the first side 130, and the second side 140 of the first substrate 11 of the ground reference substrate 10, respectively, so as to form a structural relationship in which the radiation source 102 and the ground reference 101 are disposed at intervals, and correspond to the miniaturized microwave detection apparatus 100 having a planar structure.

Further, there is a preset distance between the radiation source 102 and the reference ground 101 in the length direction of the radiation source 102, specifically, in the direction from the physical center point of the radiation source 102 to the feeding point 1020, i.e. the initial polarization direction of the radiation source 102, the preset distance between the radiation source 102 and the reference ground 101 is defined as a parameter c 1; in the direction of the feeding point 1020 of the radiation source 102 towards the physical center point, i.e. the polarization direction of the radiation source 102, the preset distance between the radiation source 102 and the reference ground 101 is defined as a parameter c2, wherein the parameters c1, c2 have a value range satisfying: c1 ≧ λ/64 or c2 ≧ λ/64, where λ is the wavelength of the detection microwave generated by the miniaturized microwave detection device 100, so as to ensure that the radiation source 102 can interact with the reference ground 101 to generate the detection microwave with an initial polarization direction when the feeding point 1020 is fed while the width dimension of the reference ground substrate 10 is consistent with the width dimension of the radiation source substrate 20 such that the size of the reference ground substrate 10 of the miniaturized microwave detection device 100 is reduced relative to the existing flat-panel microwave detection device, thereby facilitating the reduction of the sizes of the reference ground and the reference ground in the longitudinal direction of the radiation source while ensuring the radiation gain of the miniaturized microwave detection device 100.

In particular, with reference to figure 7 of the drawings accompanying the present description, the miniaturized microwave detection device 100 according to a variant of the above-described embodiment of the present invention is illustrated, wherein in this variant of the invention, the range of values of the preset distance parameter c1 between the radiation source 102 and the reference ground 101, in the initial polarization direction of the radiation source 102, satisfies c1 ≧ λ/64, wherein the range of values of the preset distance parameter c2 between the radiation source 102 and the reference ground 101, in the polarization direction of the radiation source 102, satisfies c2 ≦ λ/64, such as to facilitate reducing the size of the reference ground 101 by reducing the preset distance between the radiation source 102 and the reference ground 101 in the polarization direction of the radiation source 102 to reduce the size of the miniaturized microwave detection device 100, meanwhile, the radiation gain of the miniaturized microwave detection device 100 is ensured by the structural basis that the preset distance parameter c1 of the radiation source 102 and the reference ground 101 in the initial polarization direction of the radiation source 102 meets c1 ≧ lambda/64, so that the radiation source 102 can generate the initial polarization direction when the feeding point 1020 is fed to radiate and detect microwaves interacting with the reference ground 101.

In particular, in this variant embodiment of the invention, by keeping the radiation source 102 and the reference ground 101 in correspondence in the direction of polarization of the radiation source 102 so that the value of the preset distance parameter c2 of the radiation source 102 and the reference ground 101 in this direction tends towards a zero value, in the polarization direction of the radiation source 102, the size of the reference ground 101 is reduced to the maximum, therefore, the miniaturized microwave detection device 100 is reduced in size, meanwhile, the structural foundation that the preset distance parameter c1 of the radiation source 102 and the reference ground 101 in the initial polarization direction of the radiation source 102 meets c1 ≧ lambda/64 is met, the radiation source 102 is enabled to generate the initial polarization direction when the feeding point 1020 is fed, the radiation microwave is radiated and detected in interaction with the reference 101, and the radiation gain of the miniaturized microwave detection device 100 is guaranteed.

Further, in the above embodiment of the present invention, the miniaturized microwave detecting device 100 further includes an oscillating circuit unit 30 and a mixing detection unit 31, wherein the oscillating circuit unit 30 and the mixing detection unit 31 are disposed on the reference ground substrate 10, the radiation source 102 is electrically coupled to the oscillating circuit unit 30 and the mixing detection unit 31 at the feeding point 1020, the reference ground 101 is electrically connected to the ground potential of the oscillating circuit unit 30, wherein the oscillating circuit unit 30 is configured to allow power to be supplied and output the microwave excitation signal, so that when the oscillating circuit unit 30 is powered, the microwave excitation signal is fed to the radiation source 102 from the feeding point 1020, the radiation source 102 and the reference ground 101 of the miniaturized microwave detecting device 100 interact to generate detecting microwaves having an initial polarization direction and radiate the detecting microwaves to the outside, and receiving an echo of the detected microwave, the mixing detection unit 31 outputs an intermediate frequency signal corresponding to a frequency difference between the detected microwave and the echo thereof, and the intermediate frequency signal corresponds to a movement of a corresponding object reflecting the detected microwave to form the echo based on a doppler effect principle. In some embodiments of the present invention, the oscillation circuit unit 30 and the mixing detection unit 31 are embedded in the first substrate 11 of the reference ground substrate 10.

In particular, in this embodiment of the present invention, the radiation source 102 further has a grounding point 1021, wherein the radiation source 102 is electrically connected to the ground potential of the oscillating circuit unit 30 at the grounding point 1021 to reduce the impedance of the miniaturized microwave detecting device 100, so as to improve the anti-interference performance of the miniaturized microwave detecting device 100 in a manner of improving the quality factor (i.e., Q value) of the miniaturized microwave detecting device 100.

Specifically, in this embodiment of the present invention, the radiation source 102 is grounded at its physical center point, that is, the grounding point 1021 is located at the physical center point of the radiation source 102, so as to reduce the impedance of the miniaturized microwave detecting device 100, and simultaneously, it is favorable to maintain the current density distribution of the radiation source 102 when the feeding point 1020 is fed, thereby being favorable to ensure the radiation gain of the miniaturized microwave detecting device 100.

The miniaturized microwave detecting device 100 further includes two mounting arms 40, wherein the mounting arms 40 extend outward from the first polarization plane 110 and the second polarization plane 120 of the first substrate 11 of the reference ground substrate 10, the two mounting arms 40 are electrically connected to the oscillating circuit unit 30, and the mounting arms 40 have at least two soldering terminals 410 to allow the oscillating circuit unit 30 of the miniaturized microwave detecting device 100 to be electrically connected to an external circuit.

It should be noted that the soldering terminal 410 is disposed on the first front surface 150 of the reference ground substrate 10 in the length direction of the reference ground 101, so that the soldering terminal 410 can be equivalent to the reference ground 101 and the size requirement of the reference ground 101 in the length direction of the reference ground 101 is reduced, which is favorable for reducing the size of the reference ground 101 in the length direction of the reference ground 101, and thus, is favorable for reducing the size of the miniaturized microwave detecting device 100.

The miniaturized microwave detecting device 100 further comprises a shielding cover 50, wherein the shielding cover 50 has a receiving space 501, a mounting opening 502 communicated with the receiving space 501, and two mounting grooves 503 communicated with the receiving space 501, and two side surfaces of the shielding cover 50 are recessed inwards to form the mounting grooves 503. The shield case 50 is mounted to the reference ground substrate 10, the reference ground substrate 10 is held in the fitting opening 502 of the shield case 50, and the fitting arm 40 is disposed in the fitting groove 503 of the shield case 50. In other words, the shield case 50 is covered on the ground reference substrate 10. That is, the shield case 50 is mounted without occupying the area of the first rear surface 160 of the first substrate 11 of the reference ground substrate 10, and thus, the first substrate 11 has a sufficient space for arranging the oscillation circuit unit 30. In this way, not only the overall size of the miniaturized microwave detection device 100 is reduced, but also the anti-interference performance of the miniaturized microwave detection device 100 is ensured by the electromagnetic shielding protection of the oscillating circuit unit 30 and the mixing detection unit 31 by the shielding case 50 and the reference ground 101.

Further, the shield case 50 and the radiation source substrate 20 are respectively held on both sides of the reference ground substrate 10, the shield case 50 covers the oscillation circuit unit 30, and the oscillation circuit unit 30 is accommodated in the accommodation space 501 of the shield case 50. The shielding case 50 is made of a metal material, has good conductivity, and is beneficial to reducing the influence of the detection microwave generated by the miniaturized microwave detection device 100 and the received reflected echo on the oscillation circuit unit 30 by arranging the shielding case 50, thereby ensuring the stability and reliability of the miniaturized microwave detection device 100.

In this particular embodiment of the miniaturized microwave detecting device 100 according to the present invention, the ground reference plate 10 further includes a metal-clad layer 13, wherein the metal-clad layer 13 extends downward from the periphery of the metal layer 12 and covers at least a portion of the at least two sides of the first substrate 11. The shield case 50 is fixed to one side of the ground reference substrate 10 so as to be disposed on the metal clad layer 13.

It should be noted that the way in which the shield case 50 is fixed to the reference ground substrate 10 is not limited. Preferably, the shielding can 50 is fixed to the ground reference substrate 10 in such a manner that an inner wall of the shielding can 50 is welded to the metal edging layer 13. Optionally, the shielding cover 50 is stably disposed on the reference ground substrate 10 by screwing through corresponding holes formed in the side wall of the shielding cover 50 and the side surface of the reference ground substrate 10. Optionally, the inner wall of the shielding cover 50 and the side surface of the reference ground substrate 10 are attached to each other, and the shielding cover 50 is stably fixed to the reference ground substrate 10 by damping of the contact surface.

In a preferred embodiment of the present invention, the metal covering layer 13 is covered on the first polarization surface 110, the second polarization surface 120, the first side surface 130 and the second side surface 140 of the first substrate 11, and correspondingly, four inner walls of the shielding cover 50 are all welded on the metal covering layer 13 at a plurality of fixing positions, so that the shielding cover 50 is more firmly maintained on one side of the reference ground substrate 10. In an embodiment of the present invention, the metal edge covering layer completely covers the first polarization surface 110, the second polarization surface 120, the first side surface 130, and the second side surface 140. In an embodiment of the present invention, the metal edge covering layer 13 covers the first polarization plane 110, the second polarization plane 120, the first side 130 and the second side 140, so as to stabilize the shielding can 50 and save the consumption of the metal layer. Optionally, the metal edge covering layer 13 covers the first side surface 130 and the second side surface 140 of the first substrate 11, that is, the shielding cover 50 is covered on the ground reference substrate 10 in a manner that two inner walls are welded to the metal edge covering layer 13.

It should be understood by those skilled in the art that the specific embodiment of the metal-clad layer 13 and the specific fixing manner of the shielding case 50 are only examples and should not be construed as limiting the content and scope of the miniaturized microwave detecting device 100 of the present invention.

Further, in some embodiments of the present invention, the side of the radiation source 102 along the length direction is concavely disposed, that is, the side of the radiation source 102 corresponding to the third side 230 and the fourth side 240 of the second substrate 21 is concavely disposed, so as to facilitate further reducing the size of the radiation source 102 while ensuring the circumference of the radiation source 102, thereby ensuring that the radiation gain of the miniaturized microwave detecting apparatus 100 reduces the size of the radiation source 102.

Specifically, referring to fig. 2 to 6 of the drawings of the present disclosure, in this embodiment of the present disclosure, the first polarization surface 210 and the second polarization surface 220 of the second substrate 21 of the radiation source substrate 20 are planar surfaces, the third side surface 230 and the fourth side surface 240 are concave curved surfaces, and the shape of the radiation source 102 corresponds to the shape of the second substrate 21, that is, the side surface of the radiation source 102 corresponding to the third side surface 230 and the fourth side surface 240 of the second substrate 21 is concave curved surface.

It is worth mentioning that the side of the radiation source 102 corresponding to the third side 230 and the fourth side 240 of the second substrate 21 is recessed, so that the ground reference 101 corresponding to the recessed portion of the radiation source 102 can be coupled to the side of the radiation source 102, thereby reducing the size requirement of the ground reference 101 in the width direction of the radiation source 102, so as to facilitate the size reduction of the ground reference 101 and the ground reference substrate 10 in the width direction of the radiation source 102, and thus facilitate the size reduction of the miniaturized microwave detection apparatus 100.

The dimensions of the first and second polarization planes 110 and 120 of the first substrate 11 of the reference ground substrate 10 are respectively identical to the dimensions of the third and fourth polarization planes 210 and 220 of the second substrate 21 of the radiation source substrate 20 in the width direction of the radiation source 102, that is, the first substrate 11 of the reference ground substrate 10 and the second substrate 21 of the radiation source substrate 20 are aligned in the width direction, so that the dimensions of the reference ground substrate 10 are minimized. In other examples of the present invention, the width of the first polarization plane 110 and the second polarization plane 120 of the reference ground substrate 10 are respectively close to the width of the third polarization plane 210 and the fourth polarization plane 220 of the radiation source substrate 20, which is also beneficial to the miniaturization of the microwave detection device.

Further, the width of the radiation source 102 is defined as a parameter a, and the value range of the parameter a is: λ/8 is more than or equal to a and less than or equal to λ/2, wherein λ is the wavelength of the detection microwave generated by the miniaturized microwave detection device 100. Defining the length of the radiation source 102 as a parameter b, wherein the value range of the parameter b is as follows: b is more than or equal to lambda/8 and less than or equal to lambda/2, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device 100. This is to ensure that the radiation source 102 has a circumference of λ/2 or more, which is advantageous for reducing the size of the radiation source 102 and the gain of the miniaturized microwave detection apparatus 100, such as reducing the size of the radiation source 102 by curvedly disposing the longitudinal sides of the radiation source 102, and to ensure that the radiation source 102 has a circumference of λ/2 or more and the gain of the miniaturized microwave detection apparatus 100.

Further, the maximum distance that the radiation source 102 is recessed inward is defined as a parameter d, and the value range of the parameter d is: d is less than or equal to lambda/8, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device 100.

It should be noted that, as shown in fig. 8 of the drawings corresponding to the present invention, the miniaturized microwave detecting device 100 according to another modified embodiment of the above-mentioned embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the radiation source substrate 20 of the second substrate 21 of the third polarization surface 210, the fourth polarization surface 220, the third side surface 230 and the fourth side surface 240 are mutually connected planes, the second substrate 21 is a rectangle, and the radiation source 102 is also a rectangle.

In particular, as shown in fig. 9 of the accompanying drawings of the present invention, the miniaturized microwave detecting device 100 according to another variant of the above-described embodiment of the present invention is illustrated, wherein in this variant of the present invention, the shape of the radiation source 102 is not identical to the shape of the second substrate 21 of the radiation source substrate 20. Specifically, the third polarization surface 210, the fourth polarization surface 220, the third side surface 230, and the fourth side surface 240 of the second substrate 21 are mutually connected planes, the second substrate 21 is rectangular, and the side surface of the radiation source 102 corresponding to the third side surface 230 and the fourth side surface 240 of the second substrate 21 is a concave curved surface. It should be understood by those skilled in the art that the embodiments of the radiation source substrate 20 and the radiation source 102 are only examples and should not be construed as limiting the scope and content of the miniaturized microwave detection apparatus 100 of the present invention.

It is understood that, on the basis that the width dimension of the reference ground substrate 10 is consistent with the width dimension of the radiation source substrate 20, the side edges of the radiation source 102 along the length direction and the width direction are allowed to be arranged in a bending manner within the range that the width parameter a of the radiation source 102 satisfies λ/8 ≦ a ≦ λ/2 and the length parameter b satisfies λ/8 ≦ b ≦ λ/2, so as to facilitate further reducing the size of the radiation source while ensuring that the radiation source has a perimeter greater than or equal to λ/2, thereby ensuring the radiation gain of the miniaturized microwave detection apparatus 100 while reducing the size of the radiation source. Therefore, the embodiments of the radiation source substrate 20 and the radiation source 102 are various and cannot be a limitation to the content and scope of the miniaturized microwave detecting device 100 of the present invention.

Illustratively, referring to fig. 10 of the drawings accompanying the present disclosure, the miniaturized microwave detecting device 100 according to another modified embodiment of the above-described embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the side surface of the radiation source 102 in the width direction is further concavely disposed. Specifically, the side surfaces of the radiation source 102 corresponding to the third polarization surface 210 and the fourth polarization surface 220 of the second substrate 21 are curved and concave, so as to facilitate further reducing the size of the radiation source 102 in the width direction while ensuring the perimeter of the radiation source 102, thereby reducing the size of the radiation source 102 while ensuring the radiation gain of the miniaturized microwave detection device 100.

Illustratively, referring to fig. 11 of the drawings accompanying the present specification, the miniaturized microwave detecting device 100 according to another modified embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the side of the radiation source 102 along the length direction is concavely disposed, that is, the side of the radiation source 102 corresponding to the third side 230 and the fourth side 240 of the second substrate 21 is concavely disposed. Specifically, the side surfaces of the radiation source 102 corresponding to the third side surface 230 and the fourth side surface 240 of the second substrate 21 are inclined and recessed in a planar state so that the radiation source 102 has a trapezoidal shape with both sides of the radiation source 102 in the length direction as a waist and both sides of the radiation source 102 in the width direction as upper and lower bottoms.

Illustratively, referring to fig. 12 of the drawings accompanying the present specification, the miniaturized microwave detecting device 100 according to another modified embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the side of the radiation source 102 along the length direction is concavely disposed, that is, the side of the radiation source 102 corresponding to the third side 230 and the fourth side 240 of the second substrate 21 is concavely disposed. Specifically, the sides of the radiation source 102 corresponding to the third side 230 and the fourth side 240 of the second substrate 21 are indented at intervals to be toothed.

Illustratively, referring to fig. 13 of the drawings attached to the specification of the present invention, the miniaturized microwave detecting device 100 according to another modified embodiment of the above-described embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the sides of the radiation source 102 along the length direction and the width direction are respectively concavely disposed, specifically, the sides of the radiation source 102 corresponding to the third polarization surface 210, the fourth polarization surface 220, the third side surface 230 and the fourth side surface 240 of the second substrate 21 are respectively concavely recessed at intervals to be in a tooth shape.

Illustratively, referring to fig. 14 of the drawings attached to the specification of the present invention, the miniaturized microwave detecting device 100 according to another modified embodiment of the above-mentioned embodiment of the present invention is illustrated, wherein in this modified embodiment of the present invention, the lateral sides of the radiation source 102 along the length direction and the width direction are respectively concavely disposed, specifically, both ends of each lateral side of the radiation source 102 corresponding to the third polarization surface 210, the fourth polarization surface 220, the third lateral surface 230 and the fourth lateral surface 240 of the second substrate 21 are inclined and concavely recessed in a planar state, and accordingly, the radiation source 102 is shaped like an octagon with the two lateral sides of the radiation source 102 along the length direction as sides, the two lateral sides of the radiation source 102 along the width direction as sides and the concave end of the connected two lateral sides as sides.

It is understood that, based on the above-mentioned different embodiments of the second substrate 21 of the radiation source substrate 20, as when the third side 230 and the fourth side 240 of the second substrate 21 are concave curved surfaces, the distance between the third side 230 and the fourth side 240 of the second substrate 21 in the width direction of the radiation source 102 is not constant, and therefore, in the description of the present invention, the width dimension of the radiation source substrate 20 corresponds to the width dimension of the second substrate 21, the width dimension of the reference ground substrate 10 corresponds to the width dimension of the first substrate 11, and the understanding of the width dimension of the radiation source substrate 20 should be the maximum distance between the third side 230 and the fourth side 240 of the second substrate 21 in the width direction of the radiation source 102.

It is worth mentioning that, based on the error generated in the manufacturing process and the structure satisfying the normal operation of the miniaturized microwave detecting device 100 of the present invention, the description of the present invention that the width dimension of the reference ground substrate 10 is consistent with the width dimension of the radiation source substrate 20 should be understood on the basis of the structure that "the third polarization plane 210, the fourth polarization plane 220, the third side 230 and the fourth side 240 of the second substrate 21 of the radiation source substrate 20 respectively correspond to the first polarization plane 110, the second polarization plane 120, the first side 130 and the second side 140" of the first substrate 11 of the reference ground substrate 10, the difference between the width dimension of the reference ground substrate 10 and the width dimension of the radiation source substrate 20 is allowed to be equal to or less than lambda/32.

In some embodiments of the miniaturized microwave detecting device 100 of the present invention, the second copper-clad layer 23 of the radiation source substrate 20 is flatly adhered to the metal layer 12 of the reference ground substrate 10, and the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 are conductively and fixedly connected. In this way, the radiation gap 103 formed between the first copper-clad layer 22 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 does not form an additional oxidation-resistant metal protection layer, and thus, during the mass production of the miniaturized microwave detection device 100, the thickness of the radiation gap 103 of the miniaturized microwave detection device 100 and the stability of the medium in the radiation gap 103 are favorably maintained, that is, the dielectric loss of the radiation gap is favorably reduced, and the uniformity of the dielectric loss of the radiation gap is favorably maintained.

In other embodiments of the present invention, the radiation source substrate 20 and the reference ground substrate 10 are fixed to each other by a structure and a process of a laminated board, specifically, the radiation source substrate 20 and the reference ground substrate 10 fixed to each other by a structure and a process of a laminated board are respectively attached to two opposite sides of an insulating P-sheet to form a state in which the second copper-clad layer 23 of the radiation source substrate 20 is smoothly attached to the metal layer 12 of the reference ground substrate 10, and then the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 are electrically connected by means of a metalized via hole, so as to further form a state in which the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 are conductively and fixedly connected.

It should be noted that the first copper-clad layer 22 forming the radiation source 102 is electrically connected to the second copper-clad layer 23 at the grounding point 1021 by a via hole formed by a plated through process, so that when the second copper-clad layer 23 is flatly attached to the metal layer 12 on the first front surface 150 of the reference ground substrate 11, the radiation source 102 is formed in a state that the grounding point 1021 is electrically connected to the reference ground 101 and is grounded, which is beneficial to simplifying a grounding circuit structure of the radiation source 102 and improving the consistency and stability of the grounding circuit structure of the radiation source 102.

Preferably, the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 are directly fixed in a bare copper process. According to an embodiment of the present invention, the second copper-clad layer 23 is directly fixed to the metal layer 12 by electric welding. According to an embodiment of the present invention, the first copper-clad layer 23 is flatly disposed on the metal layer 12 of the reference ground substrate 10 by a mechanical fixing manner of a mechanical clamping structure.

In other words, the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 are not subjected to a surface treatment process step for forming an oxidation-resistant metal protection layer, but are attached and fixed in a direct contact manner, wherein the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 in a bare copper state have good leveling 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. the consistency of impedance matching of the miniaturized microwave detecting device 100. In addition, the quality factor of the miniaturized microwave detection device 100 in the working state is effectively improved in such a way, and specifically, the anti-interference performance of the miniaturized microwave detection device 100 is improved in a way of narrowing the working frequency point bandwidth of the miniaturized microwave detection device 100.

Specifically, referring to fig. 2 to 10 of the drawings of the present disclosure, the radiation source substrate 20 further includes at least two pads 24, wherein the pads 24 are formed on the third side 230 and the fourth side 240 of the second substrate 21, and the radiation source 20 is fixed to one side of the reference ground substrate 10 by welding the pads 24 to the metal layer 12 of the reference ground substrate 10. The pads 24 extend over the second copper clad layer 23 of the radiation source substrate 20, i.e. the pads 24 are conductively connected to the second copper clad layer 23.

Specifically, the second substrate 21 has at least two soldering grooves 2101, and the third side 230 and the fourth side 240 of the second substrate 21 are recessed inward to form the soldering grooves 2101 and the pads 24 cover the inner walls of the soldering grooves 2101, respectively. The soldering groove 2101 extends upward from the second copper-clad layer 23, so that after the pad 24 covering the soldering groove 2101 is formed subsequently, the pad 24 is electrically connected to the second copper-clad layer 23. Preferably, the pad 24 is formed on the inner wall of the soldering groove 2101 by means of a metalized via, that is, the shape of the pad 24 is consistent with the shape of the inner wall of the soldering groove 2101. The pads 24 are conductively connected to the metal layer 12 of the reference ground substrate 10 by filling solder in the solder grooves 2101, and the radiation source substrate 20 is stably held on one side of the reference ground substrate 10. The second copper-clad layer 24 of the radiation source substrate 20 can be smoothly adhered to the metal layer 12 of the ground reference substrate 10 by means of electric welding on the side of the radiation source substrate 20.

It is worth mentioning that the specific number and the specific shape of the soldering pot 2101 and the soldering land 24 are not limited. Preferably, the inner wall of the welding groove 2101 is a curved surface, and the radian of the welding pad 24 is fitted to the welding groove 2101, which is beneficial to increase the welding area on the basis of a certain welding spot size, i.e. beneficial to obtain stronger welding strength and smaller welding spot size when the welding pad 24 and the metal layer 12 of the reference ground substrate 10 are welded in a spot welding manner. In other embodiments of the present invention, the soldering groove 2101 and the soldering land 24 may be implemented in other shapes. In an embodiment of the present invention, the soldering groove 2101 and the soldering land 24 are implemented in four, and the soldering groove 2101 and the soldering land 24 are uniformly and symmetrically distributed on the third side 230 and the fourth side 240 of the second substrate 21. In an embodiment of the present invention, the soldering groove 2101 and the soldering land 24 are implemented as two, three, five or other numbers.

Preferably, the present invention uses a laser welding process to weld the bonding pad 24 and the metal layer 12 of the reference ground substrate 10 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 23 of the radiation source substrate 20 to the metal layer 12 of the reference ground substrate 10 are shortened, which is beneficial for shortening the period of manufacturing the miniaturized microwave detecting device 100, so as to further be beneficial for maintaining the first copper-clad layer 22 and the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10 of the bare copper process in the manufacturing period of the miniaturized microwave detecting device 100 not to be oxidized. And, due to the consistency and stability of the laser welding process, the welding of the bonding pad 24 and the metal layer 12 of the reference ground substrate 10 by using the laser welding process in a spot welding manner is beneficial to maintaining stable and consistent conductive fixation of the second copper-clad layer 23 of the radiation source substrate 20 and the metal layer 12 of the reference ground substrate 10.

In particular, in this embodiment of the invention, the first copper clad layer 22 of the radiation source substrate 20 has a smaller size than the second substrate 21. Specifically, there is a distance between the edge of the first copper-clad layer 22 of the radiation source substrate 20 and the edge of the second substrate 21, so as to prevent the first copper-clad layer 22 from being connected to the bonding pad 24, and to facilitate avoiding conduction between a solder joint formed by side spot welding and the first copper-clad layer 22 of the radiation source substrate 20 during a subsequent soldering process.

In particular, with reference to fig. 15 of the drawings accompanying the present application, the miniaturized microwave detection device 100 according to another variant of the above-described embodiment of the present invention is illustrated, wherein in this variant of the present invention, the welding slot 2101 is provided in the form of a metallized hole in the second substrate 21 of the radiation source substrate 20 by a metallized via process. In particular, the soldering bath 2101 in the form of metallized holes is located between the third side 230 of the second substrate 21 and the respective side of the radiation source 102 and between the fourth side 240 and the respective side of the radiation source 102, i.e. the soldering bath 2101 is provided as a complete metallized hole to form an electrically conductive connection between the second copper clad layer 23 and the metal layer 12 of the reference ground substrate 10 in a blind or through hole configuration through the second substrate 21.

It will be understood by those skilled in the art that the above embodiments are only examples, and the features of different embodiments, such as the shape features of the radiation source 102, the shape features of the second substrate 21 of the radiation source substrate 20, the fixed structure features of the radiation source substrate 20 and the ground reference substrate 10, and the structure features of the welding groove 2101 may be combined with each other to obtain an embodiment that is easily contemplated by the present disclosure but is not explicitly indicated in the drawings.

According to another aspect of the present invention, the present invention further provides a manufacturing method of the miniaturized microwave detecting device 100, wherein the manufacturing method includes the steps of:

(a) maintaining the width of the radiation source substrate 20 to be consistent with the width of the reference ground substrate 10;

(b) fixing the radiation source substrate 20 to the metal layer 12 of the ground reference substrate 10; and

(c) the feeding point of the radiation source 102 is electrically connected to the oscillation circuit unit 30.

Specifically, the step (a) is preceded by the steps of: covering the first copper-clad layer 22 and the second copper-clad layer 23 on the second substrate 21.

Further comprising, before said step (a), the steps of: covering the metal layer 12 on the first substrate 11.

Further comprising, before said step (b), the steps of: at least two soldering grooves 2101 are formed on the third side 230 and the fourth side 240 of the second substrate 21. In the above method, further comprising the step of: the pads 24 are covered on the inner wall defining the soldering groove 2101 of the second substrate 21. Preferably, the bonding pads 24 are formed on the inner wall of the bonding groove 2101 by a via metallization process. Preferably, the pad 24 is formed by extending the second copper-clad layer 23.

In the step (b), further comprising the steps of: the second copper-clad layer 23 of the radiation source substrate 20 is flatly attached to the metal layer 12 of the reference ground substrate 10. Preferably, the second copper-clad layer 23 is fixed to the metal layer 12 by a bare copper process.

In the step (b), further comprising the steps of: and welding the bonding pads 24 of the radiation source substrate 20 to the metal layer 12 of the reference ground substrate 10.

In the manufacturing method of the miniaturized microwave detecting device 100 of the present invention, after the step (c), the method further comprises the steps of: the shielding case 50 is disposed on the first substrate 11 of the ground reference substrate 10. Specifically, the inner wall of the shield case 50 is attached to the first substrate 11 of the ground reference substrate 10, and the first substrate 11 is held in the mounting opening 502 of the shield case 50. Further, the shielding can 50 is fixed to the first substrate 11 so as to be welded to the metal covering layer 13, covering at least a portion of at least two sides of the metal covering layer 13 of the first substrate 11.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily imaginable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

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 (10)

1. A miniaturized microwave detection device, comprising:

a ground reference substrate, wherein the ground reference substrate comprises a first substrate and a metal layer covered on the first substrate, wherein the first substrate has a first polarization surface, a second polarization surface opposite to the first polarization surface, a first side surface and a second side surface opposite to the first side surface; and

a radiation source substrate, wherein the radiation source substrate comprises a second substrate and a first copper-clad layer and a second copper-clad layer respectively held on opposite sides of the second substrate, wherein the second copper-clad layer of the radiation source substrate and the metal layer of the ground reference substrate are conductively attached such that the metal layer of the ground reference substrate forms a ground reference, the first copper-clad layer of the radiation source substrate forms a radiation source, and a radiation gap is formed between the metal layer of the ground reference substrate and the first copper-clad layer of the radiation source substrate, wherein the radiation source has a feeding point, wherein the feeding point is disposed offset from a physical center point of the radiation source, wherein the second substrate has a third polarization plane, a fourth polarization plane opposite to the third polarization plane, and a third polarization plane opposite to the third polarization plane, A third side and a fourth side opposite to the third side, wherein a connecting line direction of a physical center point of the radiation source and the feeding point is defined as a length direction of the radiation source and the radiation source substrate, a width direction of the reference ground substrate is defined as the same direction as the width direction of the radiation source substrate, the third polarization plane and the fourth polarization plane are two sides corresponding to two wide sides of the second substrate, and the third side and the fourth side are two sides corresponding to two long sides of the second substrate, wherein the third polarization plane is a side of the second substrate in the connecting line direction from the physical center point of the radiation source to the feeding point, wherein the radiation source substrate has a third polarization plane, a fourth polarization plane, a third side and a fourth side corresponding to the first polarization plane, a fourth side, and a fourth side of the reference ground substrate respectively, The second polarization surface, the first side surface and the second side surface are maintained on one side of the ground reference substrate, wherein the width of the ground reference substrate is consistent with the width of the radiation source substrate, wherein a preset distance exists between the radiation source and the ground reference in the length direction of the radiation source, wherein the preset distance between the radiation source and the ground reference in the direction from the physical center point of the radiation source to the feeding point is defined as a parameter c1, wherein the preset distance between the radiation source and the ground reference in the direction from the feeding point to the physical center point of the radiation source is defined as a parameter c2, wherein the parameters c1 and c2 satisfy the following numerical ranges: c1 is more than or equal to lambda/64 or c2 is more than or equal to lambda/64, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

2. The miniaturized microwave detection device of claim 1, wherein sides of the radiation source corresponding to the third side and the fourth side are concavely disposed.

3. The miniaturized microwave detection device of claim 2, wherein sides of the radiation source corresponding to the third side and the fourth side are configured as concave curved surfaces.

4. A miniaturized microwave detection device according to claim 3, wherein the maximum distance of inward recession of the radiation source is a parameter d, the value range of the parameter d being: d is less than or equal to lambda/8, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

5. The miniaturized microwave detection device of claim 4, wherein sides of the radiation source corresponding to the third and fourth polarization planes of the second substrate are concavely disposed.

6. The miniaturized microwave detection device of any one of claims 1 to 5, wherein the width of the radiation source is a parameter a, and the value range of the parameter a is as follows: and a is more than or equal to lambda/8 and less than or equal to lambda/2, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

7. The miniaturized microwave detection device of claim 6, wherein the length of the radiation source is a parameter b, and the value range of the parameter b is: b is more than or equal to lambda/8 and less than or equal to lambda/2, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

8. The miniaturized microwave detection device of claim 7 wherein the radiation source further comprises a grounding point, wherein the radiation source is grounded by being electrically connected to the ground reference.

9. The miniaturized microwave detection device of claim 8, wherein the parameters c1, c2 have a range of values satisfying: c1 is more than or equal to lambda/64, and c2 is more than or equal to lambda/64, wherein lambda is the wavelength of the detection microwave generated by the miniaturized microwave detection device.

10. The miniaturized microwave detection device of claim 9, wherein the radiation source and the reference ground are kept in conformity such that the parameter c2 between the radiation source and the reference ground tends towards a zero value in a direction from the feeding point of the radiation source to a physical center point.

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