CN-224217701-U - Antenna structure and radio frequency identification tag

CN224217701UCN 224217701 UCN224217701 UCN 224217701UCN-224217701-U

Abstract

The utility model belongs to the technical field of radio frequency tags, and particularly relates to an antenna structure and a radio frequency identification tag. The utility model comprises a dipole radiating arm, an inductance loop and a feeding point, wherein the dipole radiating arm comprises a straight line part, bending line parts symmetrically arranged on two sides of the straight line part and a sheet part arranged on the outer side of the bending line part, the inductance loop comprises a chip connecting point, the chip connecting point is sunken at the upper edge of the inductance loop, the feeding point is a coupling position of the inductance loop and the dipole radiating arm, the lower edge of the inductance loop is overlapped with the straight line part, and the width of the lower edge of the inductance loop is consistent with that of the straight line part. The UHF label is used for solving the technical problems that the existing UHF label has the problem in the roll-to-roll production process and the signal transmission capability cannot be simultaneously maintained in various media in the application process.

Inventors

SUN JINSONG

Assignees

永道射频技术股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250528

Claims (5)

1. An antenna structure for a portable electronic device, the antenna structure comprising, characterized by comprising the following steps: the dipole radiation arm comprises a straight line part, bending line parts symmetrically arranged at two sides of the straight line part and a sheet part arranged at the outer side of the bending line part; the inductance loop comprises a chip connecting point, and the chip connecting point is sunken at the upper edge of the inductance loop; And the feeding point is a position where the inductance loop is coupled with the dipole radiating arm, the lower edge of the inductance loop is overlapped with the straight line part, and the width of the lower edge of the inductance loop is consistent with the width of the straight line part.
2. The antenna structure of claim 1, wherein the dipole radiating arms have an outer dimension of 71mm long and 8mm wide; the width of the straight line part is 0.5-2 mm; The width of the bending line part is 0.5-2 mm, and the bending line part comprises 14-16 sections of vertical lines; The width of the sheet-shaped part is 3-6 mm.
3. The antenna structure of claim 1, wherein the transition junction of the straight portion and the meander line portion is configured as a drop.
4. The antenna structure of claim 1, wherein the inductive loop has a linewidth of 0.5-2 mm and an area of 80-120 mm2.
5. A radio frequency identification tag comprising an antenna structure as claimed in any one of claims 1 to 4; The antenna structure is disposed within the carrier.

Description

Antenna structure and radio frequency identification tag Technical Field The utility model belongs to the technical field of radio frequency tags, and particularly relates to an antenna structure and a radio frequency identification tag. Background Radio frequency identification tags are classified into Low Frequency (LF), high Frequency (HF), ultra High Frequency (UHF), and the like according to frequency. As a core technology of the Internet of things, the method has the advantages of non-contact communication and multi-target identification, and is widely applied to the fields of logistics, retail and the like. In the RFID market, roll-to-roll products have become the dominant process for mass production of UHF tags because of their cost advantages. In the process of producing tag products in a roll-to-roll mode, the existing UHF tag has the problems that antenna tracking identification is not easy, an inductance loop is damaged in the die cutting process, and in addition, in the multi-scene application process, the good signal transmission capability in air or paper media cannot be simultaneously met. Disclosure of utility model The utility model provides an antenna structure and a radio frequency identification tag, which are used for solving the technical problems that the existing UHF tag has problems in the roll-to-roll production process and the signal transmission capability cannot be simultaneously maintained in various media in the application process. The utility model provides an antenna structure, comprising: the dipole radiation arm comprises a straight line part, bending line parts symmetrically arranged at two sides of the straight line part and a sheet part arranged at the outer side of the bending line part; the inductance loop comprises a chip connecting point, and the chip connecting point is sunken at the upper edge of the inductance loop; And the feeding point is a position where the inductance loop is coupled with the dipole radiating arm, the lower edge of the inductance loop is overlapped with the straight line part, and the width of the lower edge of the inductance loop is consistent with the width of the straight line part. The sheet part of the dipole radiating arm can be used for guiding the sensor on the production equipment, so that the production process is convenient to control, the concave chip connecting point can avoid the chip from being damaged in the die cutting process, and the frequency bandwidth and the transmission efficiency can be balanced by the inductance loop and the feed point of the dipole radiating arm. Further, the outer dimension of the dipole radiation arm is 71mm long and 8mm wide; the width of the straight line part is 0.5-2 mm; The width of the bending line part is 0.5-2 mm, and the bending line part comprises 14-16 sections of vertical lines; The width of the sheet-shaped part is 3-6 mm, and the beneficial effect of the step is that the expected electric length is obtained through the smaller outer dimension. The transition joint of the straight line part and the bending line part is in a drop shape, and the beneficial effects of the step are that the resistance value can be reduced and the structural stability can be improved. Further, the line width of the inductance loop is 0.5-2 mm, the area is 80-120 mm < 2 >, and the inductance loop has the beneficial effect of balancing the resistance loss and the inductance per unit length of the inductance loop. The utility model also provides a radio frequency identification tag, which comprises the antenna structure of any one of the above; The antenna structure is disposed within the carrier. The utility model can set the antenna structure in different carriers and is suitable for the transmission environment of different media. The beneficial effects of the utility model are as follows: 1. The antenna structure of the utility model consists of an inductance loop and a dipole radiating arm, wherein the inductance loop and the dipole radiating arm are of a split structure, the sheet-shaped part of the dipole radiating arm is beneficial to the detection of a sensor of production equipment, the process regulation and control are facilitated, the chip connection point of the concave inductance loop is prevented from being damaged in the splitting process, and the roll-to-roll production process is facilitated; 2. an adjustable feed point connection structure such that the feed point maintains a low mutual inductance value. Drawings In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. Fig. 1 is a sche