CN220731771U

CN220731771U - Circular polarization miniaturized tag antenna

Info

Publication number: CN220731771U
Application number: CN202322387293.0U
Authority: CN
Inventors: 黄韡; 范小芳; 林长桂; 杨隆全; 邱延伟; 杨芸
Original assignee: XIAMEN XINDECO IOT TECHNOLOGY Ltd
Current assignee: XIAMEN XINDECO IOT TECHNOLOGY Ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-04-05
Anticipated expiration: 2033-09-04

Abstract

The utility model relates to the technical field of antennas, in particular to a circularly polarized miniaturized tag antenna. The utility model discloses a circularly polarized miniaturized tag antenna, which comprises an antenna body, wherein the antenna body comprises a square conductive ring and a square metal block, four sides of the conductive ring are respectively defined as an upper side, a left side, a lower side and a right side, a fracture is arranged on the upper side of the conductive ring and used for installing a tag chip, the left end part of the conductive ring is provided with a bending part formed by inwards bending, the metal block is arranged at the left lower corner inside the conductive ring, and the left side and the lower side of the metal block are respectively connected with the left end part of the left side and the left end part of the lower side of the conductive ring. The utility model has better omnidirectionality and sensitivity performance, has simple structure and is beneficial to miniaturization.

Description

Circular polarization miniaturized tag antenna

Technical Field

The utility model belongs to the technical field of antennas, and particularly relates to a circularly polarized miniaturized tag antenna.

Background

The RFID tag can play roles in identification, article tracking and information acquisition. At present, the RFID tag is widely applied to various fields such as supermarkets, logistics, production lines and the like as an information carrier of the Internet of things so as to facilitate intelligent management of articles.

The existing tag antenna is basically a linear polarized antenna, so that polarization mismatch between a reader and a tag is caused, only half of transmitting power is received by the tag, and the maximum reading range of the antenna is reduced. To overcome this obstacle, the concept of Circular Polarization (CP) increases the power received by the radio frequency identification tag while increasing the read range of the antenna.

In recent years, various types of passive RFID tag antennas having CP performance have been proposed in large numbers, however, many antennas are complicated in structure, large in size, and have to be improved in omni-directional and sensitivity performance.

Disclosure of Invention

The utility model aims to provide a circularly polarized miniaturized tag antenna which is used for solving the technical problems.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a miniaturized tag antenna of circular polarization, includes the antenna body, the antenna body includes square conducting ring and square metal piece, and four limits of defining the conducting ring are higher authority, left side, lower limb and right respectively, and the higher authority of conducting ring is equipped with a fracture for install the tag chip, and the left upper end of conducting ring has the kink that inwards buckles and form, and the metal piece setting is in the inside left lower corner department of conducting ring, the left side of metal piece with lower limb and the left end connection of lower limb on the left of conducting ring respectively.

Further, the conducting ring is of a rectangular structure.

Further, the metal block is of a rectangular structure, and the long sides of the metal block and the long sides of the conducting ring are arranged in the same direction.

Further, the bending part is a rectangular frame structure with an opening positioned on the left side of the conducting ring.

Further, the length of the bending part is 46mm.

Further, the novel conductive ring further comprises a first L-shaped wire, wherein the first L-shaped wire is arranged inside the conductive ring, one end of the first L-shaped wire is connected with the upper edge part of the conductive ring, which is positioned at the left side of the fracture, and the other end of the first L-shaped wire is connected with the right upper end part of the conductive ring.

Further, the metal block is characterized by further comprising a second L-shaped wire, wherein the second L-shaped wire is arranged inside the conducting ring, two ends of the second L-shaped wire are respectively connected with the left side and the lower side of the conducting ring, and the second L-shaped wire is arranged on the outer sides of the upper side and the right side of the metal block in a surrounding mode.

Further, the antenna further comprises a substrate, and the antenna body is arranged on the substrate.

Further, the base material is made of PET material.

The beneficial technical effects of the utility model are as follows:

the utility model has better omnidirectionality and sensitivity performance, has simple structure and is beneficial to miniaturization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a circularly polarized miniaturized tag antenna according to an embodiment of the present utility model;

FIG. 2 is a plot of the sensitivity of a circularly polarized miniaturized tag antenna according to an embodiment of the present utility model;

fig. 3 is a diagram of a circularly polarized miniaturized tag antenna according to an embodiment of the present utility model.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

As shown in fig. 1, a circularly polarized miniaturized tag antenna comprises an antenna body and a base material 1, wherein the antenna body comprises a square conductive ring 2 and a square metal block 3, four sides defining the conductive ring 2 are an upper side 21, a left side 22, a lower side 23 and a right side 24 respectively, the upper side 21 of the conductive ring 2 is provided with a fracture 211 for mounting a tag chip (not shown in the figure), and specifically, the tag chip is connected with two ends of the fracture 211 of the upper side 21 of the conductive ring 2.

The upper end of the left side 22 of the conductive ring 2 is provided with a bending part 221 formed by inwards bending, the metal block 3 is arranged at the left lower corner of the inside of the conductive ring 2, the left side and the lower side of the metal block 3 are respectively connected with the lower end of the left side 22 and the left end of the lower side 23 of the conductive ring 2, and through the structural arrangement, the circular polarization of the antenna is realized.

In this embodiment, the conducting ring 2 has a rectangular structure, the upper edge 21 and the lower edge 23 are long edges, the left edge 22 and the right edge 24 are short edges, the structure is more reasonable, and the service performance is improved. But is not limited thereto, in some embodiments the conductive ring 2 may also be square in structure.

More specifically, in the present embodiment, the lengths of the upper side 21 and the lower side 23 are 50mm, and the lengths of the left side 22 and the right side 24 are 47mm, but not limited thereto, and in some embodiments, the lengths of the upper side 21, the left side 22, the lower side 23, and the right side 24 may be selected according to actual needs.

In this embodiment, the metal block 3 is preferably in a rectangular structure, and the long sides of the metal block 3 and the long sides of the conductive ring 2 are arranged in the same direction, more specifically, the upper side and the lower side of the metal block 3 are long sides; the left side and the right side are short sides, and the whole lower side of the metal block 3 is integrally connected with the left end part of the lower side 23 of the conducting ring 2; the whole left side of the metal block 3 is integrally connected with the lower end portion of the left side 22 of the conductive ring 2. But is not limited thereto, and in some embodiments, the metal block 3 may be a square structure.

More specifically, in the present embodiment, the upper and lower sides of the metal block 3 have lengths of 17mm; the length of the left and right sides is 15mm, but is not limited thereto, and in some embodiments, the side length of the metal block 3 may be selected according to actual needs.

Preferably, in this embodiment, the bending portion 221 is a rectangular frame structure with an opening on the left side 22 of the conductive ring 2, which is simple and compact in structure and good in usability. However, the present utility model is not limited thereto, and in some embodiments, the bending portion 221 may have other structures.

Specifically, in the present embodiment, the length of the bending portion 221 is 46mm, and of course, in some embodiments, the length of the bending portion 221 may be set according to actual needs.

Further, in this embodiment, the antenna body further includes a first L-shaped conductive wire 4, where the first L-shaped conductive wire 4 is disposed inside the conductive ring 2, one end of the first L-shaped conductive wire 4 is connected to the upper edge 21 of the conductive ring 2 located on the left side of the break 221, and the other end of the first L-shaped conductive wire 4 is connected to the upper end of the right edge 24 of the conductive ring 2, so as to adjust electrical properties such as antenna impedance.

Further, in this embodiment, the antenna body further includes a second L-shaped conductive wire 5, the second L-shaped conductive wire 5 is disposed inside the conductive ring 2, two ends of the second L-shaped conductive wire 5 are respectively connected with the left side 22 and the lower side 23 of the conductive ring 2, and the second L-shaped conductive wire 5 is enclosed on the outer sides of the upper side and the right side of the metal block 3, so as to adjust electrical properties such as antenna impedance.

In this embodiment, the antenna body is made of aluminum or copper metal by etching, and has good performance, easy implementation and low cost, but is not limited thereto, and in some embodiments, the antenna body may be made of other metals such as silver.

In this embodiment, the substrate 1 is made of PET (polyethylene terephthalate) material, which is soft, not easy to damage due to bending, and has a thickness almost negligible, so that the substrate can be made lightweight, has low cost, and is easy to process, but not limited thereto.

The utility model has better omnidirectionality (shown in figure 3) and sensitivity performance (shown in figure 2), and has simple structure and is beneficial to miniaturization.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a miniaturized tag antenna of circular polarization, includes the antenna body, its characterized in that: the antenna body includes square conducting ring and square metal piece, and four limits that define the conducting ring are higher authority, left side, lower limit and right side respectively, and the higher authority of conducting ring is equipped with a fracture for install the tag chip, and the left upper end of conducting ring has the kink that inwards buckles and forms, and the metal piece sets up in the inside left lower corner department of conducting ring, and the left side of metal piece and the left end connection of lower extreme on the left side and the lower limit of conducting ring respectively.

2. The circularly polarized miniaturized tag antenna as set forth in claim 1, wherein: the conducting ring is of a rectangular structure.

3. The circularly polarized miniaturized tag antenna as claimed in claim 2, wherein: the metal block is of a rectangular structure, and the long sides of the metal block and the long sides of the conducting rings are arranged in the same direction.

4. The circularly polarized miniaturized tag antenna as set forth in claim 1, wherein: the bending part is a rectangular frame structure with an opening positioned on the left side of the conducting ring.

5. The circularly polarized miniaturized tag antenna as set forth in claim 4, wherein: the length of the bending part is 46mm.

6. The circularly polarized miniaturized tag antenna as set forth in claim 1, wherein: still include first L type wire, first L type wire sets up inside the conducting ring, and the one end of first L type wire is connected with the top portion of conducting ring that is located the fracture left side, and the other end of first L type wire is connected with the right upper end of conducting ring.

7. The circularly polarized miniaturized tag antenna as set forth in claim 1, wherein: the metal block is characterized by further comprising a second L-shaped wire, wherein the second L-shaped wire is arranged inside the conducting ring, two ends of the second L-shaped wire are respectively connected with the left side and the lower side of the conducting ring, and the second L-shaped wire is enclosed on the outer side of the upper side and the outer side of the right side of the metal block.

8. The circularly polarized miniaturized tag antenna as set forth in claim 1, wherein: the antenna also comprises a substrate, and the antenna body is arranged on the substrate.

9. The circularly polarized miniaturized tag antenna as set forth in claim 8, wherein: the base material is made of PET material.