CN210955162U - An electronic tag antenna, electronic tag and metal shell - Google Patents

Abstract

The utility model discloses an electronic tag antenna, an electronic tag and a metal casing, wherein the electronic tag antenna comprises a dielectric substrate, a first radiation surface and a second radiation surface that are attached; the first radiation surface is provided with a metal short-circuit ring and a metal short-circuit ring. The first metal slot has a spaced area between the metal short-circuit ring and the first metal slot; the second radiating surface is provided with a second metal slot and a third metal slot corresponding to the metal short-circuit ring and the first metal slot hole, the metal short-circuit ring is electrically connected with the second metal slot, the first metal slot is electrically connected with the third metal slot, so that the first radiation surface and the second radiation surface form a closed-loop structure; the dielectric substrate is interposed between the first and third metal slots. between the radiating surface and the second radiating surface, and located in the spaced area. The electronic tag antenna of the present invention utilizes the above-mentioned structure to achieve the metal resistance effect, ensuring that even if the electronic tag antenna is near a metal object, the receiver can receive the radio frequency signal transmitted by the electronic tag antenna.

Description

An electronic tag antenna, electronic tag and metal shell

technical field

The utility model relates to the field of RFID electronic tags, in particular to an electronic tag antenna, an electronic tag and a metal shell.

Background technique

With the rapid development of the Internet of Things industry, electronic tags realize long-distance information transmission through wireless storage radio frequency identification technology.

The electronic tag antenna of the traditional electronic tag uses polyethylene PE substrate to fix the radio frequency identification RFID chip. Once the electronic tag antenna is installed on a metal object, due to the shielding and coupling effect of the metal, the performance of the electronic tag antenna will be degraded or even invalid, which means that the receiver cannot receive the radio frequency signal transmitted by the electronic tag antenna, so it cannot be promoted on a large scale.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide an electronic tag antenna, an electronic tag and a metal shell, the electronic tag antenna can achieve anti-metal effect, avoid the shielding and coupling effects of metals, and ensure that even if the electronic tag antenna is near a metal object, The receiver can also receive the radio frequency signal transmitted by the electronic tag antenna.

In a first aspect, an embodiment of the present invention provides an electronic tag antenna, including: a dielectric substrate, a first radiating surface and a second radiating surface that are attached;

the first radiating surface is provided with a metal short-circuit ring and a first metal slot, and there is a spaced area between the metal short-circuit ring and the first metal slot;

The second radiation surface is provided with a second metal slot and a third metal slot corresponding to the metal short-circuit ring and the first metal slot, and the metal short-circuit ring is electrically connected to the second metal slot. connection, the first metal slot hole is electrically connected with the third metal slot hole, so that the first radiation surface and the second radiation surface form a closed-loop structure;

The dielectric substrate is interposed between the first radiation surface and the second radiation surface, and is located in the spaced area.

Preferably, the first radiation surface includes a first radiation plate and a second radiation plate;

The first radiating board and the second radiating board are connected by a chip; and the size of the board surface of the first radiating board and the second radiating board is different.

Preferably, the metal short-circuit ring and the first metal slot protrude from the first radiation surface and are flush with the surface of the dielectric substrate facing the second radiation surface.

In a second aspect, an embodiment of the present invention provides an electronic tag, including any electronic tag antenna of the first aspect.

Preferably, the electronic tag further comprises a chip connecting the first radiation plate and the second radiation plate, a front casing and a back casing;

The front housing is physically connected with the back housing to form a closed space;

Wherein, both the electronic tag antenna and the chip are located in the closed space.

Preferably, the four edges of the front casing are inclined planes.

Preferably, two second round holes are oppositely arranged at both ends of the front shell;

The second circular hole is collinear with the metal short-circuit ring and the first metal slot.

Preferably, the first radiating surface is provided with a plurality of first circular holes;

The plurality of first round holes are used to cooperate with the injection molding machine to fix the injection molding position of the first radiation surface during injection molding.

Preferably, the back shell is provided with a plurality of third round holes and two fourth round holes;

The number of the third circular holes is the same as that of the first circular holes and the positions are in one-to-one correspondence;

The positions of the two fourth circular holes correspond to the two second circular holes respectively.

In a second aspect, an embodiment of the present invention provides a metal casing, which is applied as an outer casing of an electronic device, and is characterized in that the electronic label is provided on the metal casing.

The embodiment of the present invention provides an electronic tag antenna, an electronic tag and a metal casing, wherein the electronic tag antenna includes a dielectric substrate, a first radiating surface and a second radiating surface that are attached; the first radiating surface is provided with a metal short circuit The ring and the first metal slot, there is a spaced area between the metal short-circuit ring and the first metal slot; the second radiating surface is provided with a second metal slot and a third metal slot corresponding to the metal short-circuit ring and the first metal slot. The metal slot, the metal short-circuit ring is electrically connected with the second metal slot, the first metal slot is electrically connected with the third metal slot, so that the first radiation surface and the second radiation surface form a closed-loop structure; the dielectric substrate is between between the first radiating surface and the second radiating surface, and located in the spaced area. Using the above structure, the electronic tag antenna of the embodiment of the present invention can achieve anti-metal effect, avoid the shielding and coupling effect of metal, and ensure that even if the electronic tag antenna is near a metal object, the receiver can also receive the radio frequency signal transmitted by the electronic tag antenna. .

Description of drawings

1 is a schematic structural diagram of a first radiation surface and a chip of an electronic tag antenna according to an embodiment of the present invention;

2 is a schematic structural diagram of a second radiation surface of an electronic tag antenna according to an embodiment of the present invention;

3 is a schematic diagram of a cross-sectional structure of an electronic tag according to an embodiment of the present invention;

4 is a schematic structural diagram of a front casing of an electronic tag according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a back shell of an electronic tag according to an embodiment of the present invention.

Detailed ways

Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

It should be understood that various modifications may be made to the embodiments claimed herein. Therefore, the above description should not be regarded as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the invention.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description of the invention given above and the detailed description of the embodiments given below, serve to explain the invention The principle of utility model.

These and other features of the invention will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the accompanying drawings.

It should also be understood that although the invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the invention with certainty, which have the features as claimed in the claims and are therefore located within the within the scope of this protection.

The above and other aspects, features and advantages of the present invention will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present invention are hereinafter described with reference to the accompanying drawings; however, it is to be understood that the claimed embodiments are merely examples of the present invention, which may be embodied in various ways. Well-known and/or repeated functions and constructions have not been described in detail to avoid obscuring the invention with unnecessary or redundant detail. Therefore, specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis for the claims and a representative basis for teaching one skilled in the art to variously employ the present invention in substantially any suitable detailed structure. Utility model.

This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may all refer to devices in accordance with the present invention. one or more of the same or different embodiments.

Specifically, the electronic tag antenna of the embodiment of the present invention includes a first radiation surface 1 and a second radiation surface 2 that are attached together, and also includes a dielectric substrate 3 .

1 is a schematic structural diagram of a first radiation surface 1 and a chip 4 according to an embodiment of the present invention. Here, the first radiation surface 1 is made of metal materials (including copper, aluminum, etc., which can be adjusted according to specific usage conditions and manufacturer requirements). Specifically, the first radiation surface 1 includes a first radiation plate 11, a second radiation plate 12 and a chip 4; there is a gap between the first radiation plate 11 and the second radiation plate 12, the gap makes the first radiation plate 11 and the The second radiating plate 12 is disconnected, and feeding points are provided on both sides of the gap for transmitting signals. As shown in FIG. 1 , the first radiation plate 11 and the second radiation plate 12 are connected through the chip 4 .

It is worth noting that the sizes of the surfaces of the first radiation plate 11 and the second radiation plate 12 are different. As shown in FIG. 1 , the widths of the first radiation plate 11 and the second radiation plate 12 in the first direction are the same. The heights in the two directions are different.

The first radiation surface 1 is provided with a metal short-circuit ring 13 and a first metal slot 14 , and there is a spaced area between the metal short-circuit ring 13 and the first metal slot 14 . Specifically, in the embodiment of the present invention, the metal short-circuit ring 13 is provided on the first radiation plate 11, and the first metal slot 14 is provided on the second radiation plate 12 for illustration and illustration. The example is not limited to this, and the first metal slot 14 may be provided on the first radiation plate 11 , and the metal short-circuit ring 13 may be provided on the second radiation plate 12 .

Here, the first metal slot 14 on the first radiating surface 1 is used to adjust the impedance and direction of the electronic tag antenna. For example, the first metal slot 14 extends to the edge of the first radiating surface 1 along the first direction. The tag antenna is capacitive, and the frequency tends to shift to high frequencies

2 is a schematic structural diagram of the second radiating surface 2 according to the embodiment of the present invention. It can be seen that the second radiating surface 2 is provided with a second metal slot 21 and a third metal slot 22, and the second metal slot 21 The positions of the third metal slot 22 correspond to the positions of the metal short-circuit ring 13 and the first metal slot 14 respectively. The metal short-circuit ring 13 is electrically connected to the second metal slot 21, and the first metal slot 14 is connected to the The three metal slot holes 22 are electrically connected, so that the first radiation surface 1 and the second radiation surface 2 are pasted through the metal short-circuit ring 13 , the first metal slot hole 14 , the second metal slot hole 21 and the third metal slot hole 22 . combine.

The second radiating surface 2 in the embodiment of the present invention is used to reflect and adjust impedance. Specifically, the second metal slot 21 and the third metal slot 22 on the second radiating surface 2 are used to adjust the resonant frequency, and the third The slot depths of a metal slot 14 , the second metal slot 21 , and the third metal slot 22 have an asymmetric structure, so that the current distribution is asymmetric.

3 is a schematic diagram of a cross-sectional structure of an electronic tag provided by an embodiment of the present invention. As can be seen from the figure, the dielectric substrate 3 is between the first radiation surface 1 and the second radiation surface 2, and is located between the metal short-circuit ring 13 and the first radiation surface 2. The spaced area between the metal slot holes 14 .

By adjusting the width of the second metal slot 21 and the third metal slot 22 on the second radiating surface 2 in the second direction, impedance adjustment, pattern, lobe width adjustment and gain effect optimization are performed. The width in the direction increases, the impedance goes from the capacitive region to the inductive region and back to the capacitive region with the increase of the width, the antenna gradually shifts to the high frequency, the pattern and gain value reach the inductive region in the impedance, and the impedance of chip 4 When the conjugate impedance is formed, the transmission effect of the radio frequency signal of the electronic tag antenna is the best. The metal short-circuit ring 13 and the first metal slot 14 of the first radiating surface 1 cooperate with the second metal slot 21 and the third metal slot 22 of the second radiating surface 2, so that the debugging can be achieved suitable for various application scenarios. Effect. For those skilled in the art, the widths of the second metal slot 21 and the third metal slot 22 in the second direction can be calculated and simulated according to the different impedances of the chip 4 to make precise adjustments to achieve The best effect of electronic tag antenna.

The dielectric substrate 3 provided by the embodiment of the present invention is an ordinary printed circuit board, mainly made of glass cloth substrate FR4, and is made by the basic process of making circuit boards, and the embodiment of the present invention will not be described too much. . The dielectric substrate 3 made of FR4 has the characteristics of high pressure resistance and high temperature resistance, and the dielectric constant can be controlled, so it is suitable for integral injection molding, so that a higher protection level can be achieved, and a good waterproof effect can be achieved. Further, the metal short-circuit ring 13 and the first metal slot 14 protrude from the first radiation surface 1 and are flush with the plate surface of the dielectric substrate 3 facing the second radiation surface, wherein the standard thickness of the dielectric substrate 3 is 1.6 mm, Its dielectric constant can be guaranteed to remain unchanged, but in specific implementation, its thickness can be adjusted according to the actual situation.

The above-mentioned electronic tag antenna provided in the embodiment of the present invention can make the electronic tag antenna achieve anti-metal effect, avoid the shielding and coupling effects of metal, and even if the tag is directly attached to the metal, it will not affect the radio frequency of the electronic tag antenna. Signal transmission effect and read and write distance. Further, compared with the traditional anti-metal electronic tag, the antenna cannot work on the surface of the metal object at close range, and a larger volume is required to meet the usage scenario. The surface 1 is integrated through a standard printed circuit board, and the edge of the electronic tag antenna is set to be inclined, so as to reduce the size of the anti-metal electronic tag antenna and meet the aesthetics and practicability. At the same time, the asymmetrical first radiating plate 11 and the second radiating plate 12 are used as a whole to cut the magnetic induction lines on the metal surface, and obtain energy by continuously cutting the magnetic induction lines for reading and identification (transmission of radio frequency signals).

The embodiment of the present invention also provides an electronic tag including the above-mentioned electronic tag antenna, the electronic tag further includes a chip 4 connecting the first radiating plate and the second radiating plate, a front casing 5 and a back casing 6, and the front casing 5 and the back casing. 6. Physical connection to form a closed space; wherein, the electronic tag antenna (ie the first radiation surface 1, the second radiation surface 2, the dielectric substrate 3) and the chip 4 are all in the closed space formed by the above-mentioned front shell 5 and back shell 6.

4 is a schematic diagram of the structure of the front housing 5 according to the embodiment of the present invention. The four edges of the front housing 5 are inclined surfaces, and the angle between the inclined surfaces in the first direction and the plane of the front housing 5 is smaller than that in the second direction. The angle formed by the slope on the upper surface and the plane of the front housing 5 . Among them, the front casing 5 is provided with a first round hole 51 on the inclined surface in the second direction. Through the first round hole 51, the electronic label can be fixed on the fixed asset in various ways, so that the electronic label can be used in various application scenarios. Work.

Considering that when the electronic label is injection molded, the position of the electronic label antenna will cause the electronic label after injection molding to fail. In order to solve this problem, as shown in FIG. 1 , the first radiation surface 1 is provided with a plurality of second circular holes 15 ; as shown in FIG. 2 , a plurality of third circular holes 23 are provided on the second radiation surface 2 . The number of the two circular holes 15 is the same as that of the third circular hole 23 and the positions are in a one-to-one correspondence. The plurality of second round holes 15 and third round holes 23 are used to cooperate with the injection molding machine to fix the injection positions of the first radiation surface 1 and the second radiation surface 2 during injection molding, so as to ensure the position of the dielectric substrate 3 in the mold No offset occurs. 1 and 2 show four second round holes 15 and four third round holes 23, however, the embodiment of the present invention is not limited to this, the second round hole 15 and the third round hole 23 The number can be determined according to the actual situation, such as the fixing parts of the injection molding machine, the size of the first radiation surface 1, and the like.

5 is a schematic view of the structure of the rear casing 6 according to the embodiment of the present invention. The rear casing 6 is provided with a plurality of fourth round holes 61 ; wherein, the fourth round holes 61 are the same in number as the second round holes 15 and are located at the same location. One-to-one correspondence is used to adjust its position in the cavity of the injection molding machine, which solves the problem of insufficient glue injection for the dielectric substrate 3 during the injection molding process, so that the injection molding machine can continue to inject glue, which is the key to stable molding effect. The back shell 6 also includes two fifth round holes 62, the positions of the two fifth round holes 62 correspond to the two first round holes 51 respectively, and the electronic label is fixed on the electronic label through the first round holes 51 and the fifth round holes 62. on assets.

The electronic label provided by the embodiment of the present invention is obtained by integrally injection molding the chip 4 and the high-reliability weather-resistant engineering plastics (the front shell 5 and the back shell 6 ), which is convenient for mass production; A round hole 51 and the fifth round hole 62 provided on the back shell 6 enable the electronic tag to have a variety of installation methods, including but not limited to adhesive, bracket fixing and rivet crimping; it can also achieve waterproof, dustproof, shockproof and other functions.

The electronic tag antenna in the electronic tag provided by the embodiment of the present invention is a passive anti-metal tag antenna, does not need to install a battery, adopts a frequency hopping working mode, is not limited and affected by the number of tags in the working area, and can be used in relatively harsh environments. Indoor and outdoor equipment management, warehousing, mold, power industry and other complex working conditions, the memory can be repeatedly erased and written more than 10,000 times, and the service life can follow the entire life cycle of the product.

The embodiment of the present invention also provides a metal casing, which is used as an outer casing of an electronic device. During application, the electronic label is arranged on the metal casing to ensure that the receiver can receive the radio frequency signal transmitted by the electronic label.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the spirit and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims (10)

1. An electronic tag antenna, characterized in that, comprising: a dielectric substrate, a first radiating surface and a second radiating surface that are attached; the first radiating surface is provided with a metal short-circuit ring and a first metal slot, and there is a spaced area between the metal short-circuit ring and the first metal slot; The second radiation surface is provided with a second metal slot and a third metal slot corresponding to the metal short-circuit ring and the first metal slot, and the metal short-circuit ring is electrically connected to the second metal slot. connection, the first metal slot hole is electrically connected with the third metal slot hole, so that the first radiation surface and the second radiation surface form a closed-loop structure; The dielectric substrate is interposed between the first radiation surface and the second radiation surface, and is located in the spaced area. 2. The electronic tag antenna according to claim 1, wherein the first radiation surface comprises a first radiation plate and a second radiation plate; The first radiating board and the second radiating board are connected by a chip; and the size of the board surface of the first radiating board and the second radiating board is different. 3 . The electronic tag antenna according to claim 1 , wherein the metal short-circuit ring and the first metal slot protrude from the first radiating surface, and face the second radiating surface with the dielectric substrate. 4 . The plane of the radiating surface is flush. 4. An electronic tag, characterized in that it comprises an electronic tag antenna according to any one of the preceding claims 1-3. 5 . The electronic tag according to claim 4 , further comprising a chip, a front casing and a back casing connecting the first radiation plate and the second radiation plate; 5 . The front housing is physically connected with the back housing to form a closed space; Wherein, both the electronic tag antenna and the chip are located in the closed space. 6 . The electronic label according to claim 5 , wherein the four edges of the front shell are inclined planes. 7 . 7. The electronic label according to claim 6, wherein two first circular holes are oppositely provided at both ends of the front housing; The first circular hole is collinear with the metal short-circuit ring and the first metal slot. 8. The electronic label according to claim 7, wherein a plurality of second circular holes are provided on the first radiation surface, and a plurality of third circular holes are provided on the second radiation surface; The number of the second round holes is the same as that of the third round holes, and the positions are in one-to-one correspondence; The plurality of second round holes and the third round holes are used to cooperate with the injection molding machine to fix the injection molding position of the first radiation surface during injection molding. 9. The electronic label according to claim 8, wherein a plurality of fourth round holes and two fifth round holes are arranged on the back shell; The number of the fourth circular holes is the same as that of the second circular holes and the positions are in one-to-one correspondence; The positions of the two fifth circular holes correspond to the two first circular holes respectively. 10 . A metal casing, which is used as an outer casing of an electronic device, wherein the electronic label according to any one of claims 4 to 9 is provided on the metal casing.

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