CN217468771U

CN217468771U - Tag antenna

Info

Publication number: CN217468771U
Application number: CN202122963880.0U
Authority: CN
Inventors: 成晓龙; 林杰; 皮健; 李建强; 贾硕
Original assignee: State Grid Corp of China SGCC; State Grid Information and Telecommunication Co Ltd; Beijing Smartchip Microelectronics Technology Co Ltd; Beijing Smartchip Semiconductor Technology Co Ltd
Current assignee: State Grid Corp of China SGCC; State Grid Information and Telecommunication Co Ltd; Beijing Smartchip Microelectronics Technology Co Ltd; Beijing Smartchip Semiconductor Technology Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-09-20
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a tag antenna, tag antenna includes: a substrate; a mounting bracket mounted to the substrate; the antenna plate is arranged on the mounting bracket and is parallel to the substrate, and a metal piece is connected between the antenna plate and the substrate; the power divider is arranged on the substrate and connected with the metal piece. From this, through set up the antenna panel on tag antenna, the antenna panel can improve tag antenna's gain, increase tag antenna's signal receiving and dispatching distance, compares with prior art, and the performance of tag antenna can be promoted under lower upgrading cost to the antenna panel to can improve tag antenna's price/performance ratio, and then can improve tag antenna's product competitiveness.

Description

Tag antenna

Technical Field

The utility model belongs to the technical field of communication and specifically relates to a tag antenna is related to.

Background

The tag antenna can be placed on an article, and the reader can acquire identity information of the article through the tag antenna by matching with the tag antenna. The tag antenna technology is widely applied to the fields of warehousing, logistics, detection, inventory and the like.

In the related art, as the application field of the tag antenna is more and more extensive, the requirements of diversification and high performance are provided for the tag antenna in the industry. The gain of tag antenna is lower, and tag antenna's signal receiving and dispatching distance is nearer, and tag antenna loses efficacy after exceeding the scope easily, and in order to improve tag antenna's gain, increase tag antenna's signal receiving and dispatching distance, the cost that current tag antenna need spend when improving the performance is higher to can influence tag antenna's price/performance ratio, and then can influence tag antenna's product competitiveness.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a tag antenna, this tag antenna's antenna panel can promote tag antenna's performance under lower upgrade cost to can improve tag antenna's price/performance ratio, and then can improve tag antenna's product competitiveness.

According to the utility model discloses a tag antenna includes: a substrate; a mounting bracket mounted to the substrate; the antenna plate is arranged on the mounting bracket and is parallel to the substrate, and a metal part is connected between the antenna plate and the substrate; the power divider is arranged on the substrate and connected with the metal piece.

According to the utility model discloses a tag antenna, through set up the antenna panel on tag antenna, the antenna panel can improve tag antenna's gain, increase tag antenna's signal receiving and dispatching distance, compares with prior art, and the performance of tag antenna can be promoted under lower upgrading cost to the antenna panel to can improve tag antenna's price/performance ratio, and then can improve tag antenna's product competitiveness.

In some examples of the present invention, the thickness direction of the tag antenna is greater than the projection area of the substrate, and the projection of the antenna board is located in the projection of the substrate.

In some examples of the present invention, the substrate has a first surface and a second surface opposite to each other in a thickness direction of the substrate, the first surface is provided with the mounting bracket, and the power divider is provided on the second surface.

In some examples of the invention, the central axis of the antenna board is collinear with the central axis of the substrate.

In some examples of the invention, the substrate is provided with a bonding pad, and the power divider is welded to the bonding pad.

In some examples of the present invention, the metal member is connected to a corner of the antenna board.

In some examples of the present invention, the substrate and the antenna board are both configured as a PCB board.

In some examples of the present invention, the mounting bracket is configured as a plastic board bracket, the mounting bracket having a low dielectric constant of 3.25.

In some examples of the invention, the substrate is configured as a square, the substrate having a side length of 130mm to 150 mm.

In some examples of the present invention, a separation distance between a surface of the antenna board away from the substrate and a surface of the substrate away from the antenna board is 12mm to 13 mm.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of a tag antenna according to an embodiment of the present invention;

fig. 2 is a side view of a tag antenna according to an embodiment of the present invention.

Reference numerals:

a tag antenna 100;

a substrate 10; a first surface 11; a second surface 12;

a mounting bracket 20; an antenna board 30; a metallic member 40; a power divider 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the following, referring to fig. 1-2, a tag antenna 100 according to an embodiment of the present invention is described, and the tag antenna 100 may be an RFID (Radio Frequency Identification-Radio Frequency Identification) antenna.

According to the utility model discloses a tag antenna 100 includes: base plate 10, mounting bracket 20, antenna board 30 and power divider 50. The mounting bracket 20 is mounted on the substrate 10, the antenna plate 30 is mounted on the mounting bracket 20 and is parallel to the substrate 10, the metal fitting 40 is connected between the antenna plate 30 and the substrate 10, and the power divider is disposed on the substrate 10 and is connected to the metal fitting 40.

Wherein, tag antenna 100 can use with reading the ware cooperation, and tag antenna 100 can be connected with radio frequency transceiver chip communication, and radio frequency transceiver chip can include the hyperfrequency RFID communication chip, can save identity information in the hyperfrequency RFID communication chip, and tag antenna 100 can constitute tag detection terminal with radio frequency transceiver chip, and tag detection terminal can install on article.

The reader can radiate and receive radio frequency signals, and the radio frequency signals can be ultrahigh frequency communication signals in the 902-928MHz frequency band. When the reader radiates radio-frequency signals outwards, the radio-frequency signals can be received by the antenna board 30 on the tag antenna 100, when the antenna board 30 receives the radio-frequency signals, the tag antenna 100 can convert the radio-frequency signals into high-frequency oscillating currents to be sent to the radio-frequency transceiving chip, the radio-frequency transceiving chip can reply identity information to the reader through the tag antenna 100 after receiving the signals, the reader can acquire the identity information of the tag detection terminal after receiving the radio-frequency signals radiated by the tag antenna 100, the management system can identify articles according to the identity information of the tag detection terminal, and therefore the technical effect that the management system remotely manages the articles through a radio-frequency identification technology can be achieved.

Further, as shown in fig. 2, a surface of the antenna board 30 close to the substrate 10 (i.e., a right surface of the antenna board 30 in fig. 2) may be provided with an adhesive, and the antenna board 30 may be attached to the mounting bracket 20 by the adhesive, so that a technical effect of mounting the antenna board 30 to the mounting bracket 20 may be achieved. Moreover, the surface of the mounting bracket 20 away from the antenna board 30 (i.e. the right surface of the mounting bracket 20 in fig. 2) may be provided with an adhesive, and the mounting bracket 20 may be bonded to the substrate 10 by the adhesive, so that the technical effect of mounting the mounting bracket 20 to the substrate 10 may be achieved.

Further, at least one group of antenna arrays may be constructed on the antenna board 30, the antenna board 30 may receive a radio frequency signal of a reader through the antenna arrays, the antenna board 30 may increase a gain of the tag antenna 100 and increase a signal transceiving distance of the tag antenna 100, the substrate 10 may serve as the reflective substrate 10 of the tag antenna 100, a feeding network may be disposed on the substrate 10, at least one feeding point may be disposed on the feeding network, the feeding point may be connected to the metal element 40, the feeding network may feed power to the antenna board 30 through the metal element 40, that is, the metal element 40 may serve as a feeding line between the antenna arrays and the feeding network. The power divider 50 may be connected to the antenna array on the antenna board 30 through the metal component 40, and the power divider 50 may divide one signal into multiple signals to output, so as to increase the signal transceiving range of the tag antenna 100.

From this, through set up antenna panel 30 on tag antenna 100, antenna panel 30 can improve tag antenna 100's gain, increase tag antenna 100's signal transceiver distance, compares with prior art, and antenna panel 30 can promote tag antenna 100's performance under lower upgrading cost to can improve tag antenna 100's price/performance ratio, and then can improve tag antenna 100's product competitiveness.

In some embodiments of the present invention, as shown in fig. 1 and fig. 2, the projection area of the substrate 10 in the thickness direction of the tag antenna 100 may be larger than the projection area of the antenna board 30, and the projection of the antenna board 30 is located in the projection of the substrate 10, and further, the projection range of the antenna board 30 is located in the projection range of the substrate 10. Here, the thickness direction of the tag antenna 100 may refer to the left and right direction in fig. 2, when there are a plurality of articles using the tag detection terminal, the tag antenna 100 is mounted on each of the plurality of articles, and the substrate 10 may shield the antenna plate 30 in the direction from the reader to the tag detection terminal. When the reader radiates the radio frequency signal, the reader may radiate the radio frequency signal from a side of the tag antenna 100 away from the substrate 10 (i.e., a left side of the tag antenna 100), the radio frequency signal may be received by the antenna plate 30, in a radial direction of the tag antenna 100, when the radio frequency signal continues to be conducted in a medium (air), the radio frequency signal may be blocked by the substrate 10, and the radio frequency signal may not be received by a tag detection terminal of the substrate 10 away from the reader side, so that a problem of cross-reading of the reader when identifying information of an article may be avoided, and a cross-reading rate of the tag antenna 100 may be effectively reduced.

In some embodiments of the present invention, as shown in fig. 2, in the thickness direction of the substrate 10, the substrate 10 has a first surface 11 and a second surface 12 opposite to each other, the first surface 11 may be provided with the mounting bracket 20, and the power divider 50 may be provided on the second surface 12. The thickness direction of the substrate 10 may refer to the left-right direction in fig. 2, the first surface 11 of the substrate 10 may refer to the left surface of the substrate 10 in fig. 2, and the second surface 12 of the substrate 10 may refer to the right surface of the substrate 10 in fig. 2, it can be understood that the power divider 50 and the mounting bracket 20 are spaced apart in the thickness direction of the substrate 10, and thus the interference between the power divider 50 and the mounting bracket 20 can be avoided, so that the assembly difficulty of the tag antenna 100 can be reduced.

Furthermore, an electrical bridge (i.e., the power divider 50) may be further disposed on the second surface 12 of the substrate 10, the electrical bridge may be connected to one end of a coaxial cable, the other end of the coaxial cable may be connected to a radio frequency transceiver chip, the radio frequency transceiver chip may send identity information to the tag antenna 100 through the coaxial cable, the tag antenna 100 may generate a radio frequency signal according to the identity information, the radio frequency signal may radiate outwards from the antenna board 30, and the reader may read the identity information of the radio frequency transceiver chip after receiving the radio frequency signal radiated by the tag antenna 100.

In some embodiments of the present invention, the central axis of the antenna board 30 may be collinear with the central axis of the substrate 10 in the thickness direction of the tag antenna 100. Wherein the antenna plate 30 is mounted on the mounting bracket 20 and is parallel to the substrate 10, it is understood that the central axis of the antenna plate 30 may be parallel to the central axis of the substrate 10, and the central axis of the antenna plate 30 may extend in the thickness direction of the tag antenna 100, and the central axis of the antenna plate 30 may be collinear with the central axis of the tag antenna 100. The central axis of the substrate 10 may be disposed to extend in the thickness direction of the tag antenna 100, and the central axis of the substrate 10 may be collinear with the central axis of the tag antenna 100, whereby the central axis of the antenna board 30 may be collinear with the central axis of the substrate 10. By making the central axis of the antenna plate 30 collinear with the central axis of the substrate 10, the gain of the tag antenna 100 can be increased, and the signal transmission/reception range of the tag antenna 100 can be further increased.

In some embodiments of the present invention, the substrate 10 may be provided with a pad, and the power divider 50 may be welded to the pad. The pads may be made of a metal material, and the pads may be disposed on the feeding network of the substrate 10, and the pads may be connected to the feeding network. Furthermore, in the thickness direction of the substrate 10, the pad may penetrate through the substrate 10, when the feeding network is disposed on the first surface 11 of the substrate 10 and the power divider 50 is disposed on the second surface 12 of the substrate 10, the pad may communicate the feeding network and the power divider 50 that are spaced apart in the thickness direction of the substrate 10, the pad may connect the power divider 50 with the feeding network, the power divider 50 may input multiple high-frequency oscillating currents into the feeding network, the multiple high-frequency oscillating currents may be converted into radio-frequency signals on the antenna board 30, and the tag antenna 100 and the reader may be communicatively connected by the radio-frequency signals.

In some embodiments of the present invention, a metal member 40 may be connected to a corner of the antenna board 30. The metal member 40 may be configured as a metal pin, the metal member 40 may extend in the thickness direction of the tag antenna 100, one end of the metal member 40 close to the antenna board 30 may be connected to a corner of the antenna board 30, one end of the metal member 40 close to the antenna board 30 may refer to the left end of the metal member 40 in fig. 2, one end of the metal member 40 close to the substrate 10 may be connected to a pad on the substrate 10, and one end of the metal member 40 close to the substrate 10 may refer to the right end of the metal member 40 in fig. 2.

When the cross section of the antenna board 30 is a quadrangle, four metal pieces 40 may be disposed on the tag antenna 100, and all four metal pieces 40 may be connected between the antenna board 30 and the substrate 10. When four metal members 40 are disposed between the antenna board 30 and the substrate 10, four feeding points may be correspondingly disposed on the feeding network, and the four metal members 40 may be connected to the four feeding points on the feeding network respectively. The power divider 50 may be connected to the four metal members 40, and may divide one path of signal into multiple paths of signals to be output, and the output multiple paths of signals may be sent to the antenna board 30 through the four metal members 40, and the power divider may increase a signal transceiving range of the tag antenna 100, so as to improve product quality of the tag antenna 100.

In some embodiments of the present invention, the substrate 10 and the antenna Board 30 may be configured as a PCB (Printed Circuit Board). The surfaces of the substrate 10 and the antenna plate 30 may both form circuits through an etching process, the circuits formed on the surface of the antenna plate 30 may be configured as an antenna array, the antenna array may be a dual-polarized antenna circuit, the dual-polarized antenna circuit has two sets of antenna circuits with different polarization angles, and the antenna plate 30 may enable the tag antenna 100 to be used as a high-gain dual-polarized directional antenna.

The substrate 10 may be designed with a feeding network, the feeding network may feed to the antenna array, after the feeding network is fed with the high-frequency oscillating current, the high-frequency oscillating current may be conducted to the antenna array through the metal member 40, and the high-frequency oscillating current may be converted into a spatial high-frequency electromagnetic wave in the antenna array, for example, in some specific embodiments of the present invention, the high-frequency oscillating current may be converted into an ultrahigh frequency communication signal in a frequency band of 902-. The uhf communication signal may radiate outward from the antenna board 30.

In some embodiments of the present invention, the mounting bracket 20 may be configured as a plastic board bracket, and the low dielectric constant of the mounting bracket 20 is 3.25. The mounting bracket 20 is connected to the antenna board 30, and when there is a radio frequency signal around the antenna board 30, the radio frequency signal may use the mounting bracket 20 as a conducting medium, and the radio frequency signal may form an alternating external electric field and an external magnetic field around the antenna board 30. When a material with high dielectric constant is placed in the external electric field, the strength of the electric field will decrease in the medium, which will cause the strength of the radio frequency signal received or transmitted by the antenna plate 30 to decrease, thereby affecting the signal transceiving range of the tag antenna 100.

In order to improve the strength of the radio frequency signal received or transmitted by the antenna board 30, the mounting bracket 20 is configured as a plastic board bracket, and the dielectric constant of the mounting bracket 20 is set to 3.25, so that the influence of the mounting bracket 20 on the strength of the radio frequency signal can be reduced, and the antenna board 30 can be ensured to have good radiation efficiency, thereby improving the gain of the tag antenna 100, increasing the signal transceiving distance of the tag antenna 100, and further ensuring the normal communication connection between the tag antenna 100 and a reader with a long spacing distance.

It should be noted that the dielectric constant of the material selected for the mounting bracket 20 cannot be too large or too small, and when the dielectric constant of the material selected for the mounting bracket 20 is too large, the mounting bracket 20 may restrict the electron flow velocity of the radio frequency signal, thereby reducing the radiation efficiency of the tag antenna 100. When the dielectric constant of the material selected for the mounting bracket 20 is too small, the size of the antenna board 30 needs to be increased, which is not favorable for the miniaturization design of the tag antenna 100, and thus, the installation and transportation of the tag antenna 100 may be affected, and the production cost of the tag antenna 100 may also be increased.

In some embodiments of the present invention, the shape of the substrate 10 may be configured as a square, and the side length of the substrate 10 may be set to 130mm to 150 mm. Preferably, the side length of the substrate 10 may be set to 140mm, and further, the antenna plate 30 may also be configured to be square, and the side length of the antenna plate 30 is smaller than the side length of the substrate 10. That is, when the side length of the substrate 10 is set to 140mm, the side length of the antenna board 30 is less than 140 mm. By setting the side length of the substrate 10 to 140mm, the substrate 10 may have suitable reflection efficiency, and the antenna board 30 may also have good radiation efficiency, so that the tag antenna 100 may have a larger signal transceiving range, and then the product competitiveness of the tag antenna 100 may be improved, and in the thickness direction of the tag antenna 100, it may also be ensured that the projection range of the antenna board 30 is located within the projection range of the substrate 10.

In some embodiments of the present invention, as shown in fig. 2, the surface of the antenna board 30 away from the substrate 10 is spaced from the surface of the substrate 10 away from the antenna board 30 by a distance of 12mm to 13mm, as shown in fig. 2, a surface of the antenna board 30 away from the substrate 10 may refer to a left surface of the antenna board 30, and a surface of the substrate 10 away from the antenna board 30 may refer to a right surface of the substrate 10, and preferably, a spaced distance between the left surface of the antenna board 30 and the right surface of the substrate 10 may be set to 12.5mm, this arrangement makes it possible to make the spacing distance between the left surface of the antenna board 30 and the right surface of the substrate 10 more appropriate, when the antenna board 30 radiates a radio frequency signal outwards, the radio frequency signal may be reflected on the surface of the substrate 10, and the substrate 10 may further enhance the capability of the antenna board 30 to radiate the radio frequency signal directionally, so that the performance stability of the tag antenna 100 may be further improved.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A tag antenna, comprising:

a substrate;

a mounting bracket mounted to the substrate;

the antenna plate is arranged on the mounting bracket and is parallel to the substrate, and a metal part is connected between the antenna plate and the substrate;

the power divider is arranged on the substrate and connected with the metal piece.

2. The tag antenna of claim 1, wherein a projected area of the substrate in a thickness direction of the tag antenna is larger than a projected area of the antenna board, and the projection of the antenna board is located within the projection of the substrate.

3. The tag antenna of claim 1, wherein the substrate has a first surface and a second surface opposite to each other in a thickness direction of the substrate, the first surface is provided with the mounting bracket, and the power divider is provided on the second surface.

4. The tag antenna of any one of claims 1-3, wherein a central axis of the antenna plate is collinear with a central axis of the substrate.

5. The tag antenna of claim 1, wherein the substrate is provided with a pad, and the power divider is soldered to the pad.

6. The tag antenna of claim 1, wherein the metal piece is connected at a corner of the antenna board.

7. The tag antenna of claim 1, wherein the substrate and the antenna board are each configured as a PCB board.

8. The tag antenna of claim 1, wherein the mounting bracket is configured as a plastic board bracket, the mounting bracket having a low dielectric constant of 3.25.

9. The tag antenna of claim 1, wherein the substrate is configured as a square, the substrate having a side length of 130mm to 150 mm.

10. The tag antenna of claim 1, wherein a surface of the antenna board remote from the substrate is spaced from a surface of the substrate remote from the antenna board by a distance of 12mm to 13 mm.