Small-size UHF tag

Abstract

The utility model relates to a small-size UHF (Ultra High Frequency) tag, which comprises a chip, a short circuit ring and an antenna oscillator, the short circuit ring comprises four edges, namely a top edge, a bottom edge, a first side edge and a second side edge; the chip is arranged in the center of the bottom edge of the short circuit ring; a pair of blocky antenna oscillators, namely a first antenna oscillator and a second antenna oscillator, which are in mirror symmetry are arranged on the two sides of the short circuit ring, the first antenna oscillator is connected with the first side edge and the bottom edge of the short circuit ring, and the second antenna oscillator is connected with the second side edge and the bottom edge of the short circuit ring; the joints of the first antenna oscillator and the second antenna oscillator with the bottom edge of the short circuit ring are respectively provided with a slot. Compared with a traditional bending structure, the anti-interference capacity is higher, and the performance on air and liquid can be met at the same time.

Description

Technical Field

[0001] The utility model relates to the field of UHF tags, in particular to a small-sized UHF tag. Background Art

[0002] like Figure 1 As shown, currently, antennas of small-sized UHF tags mostly adopt a dipole bending structure. After the antenna is bent multiple times, the gain will deteriorate and the inductance will be larger, which will narrow its bandwidth and cannot meet the performance of the tag in both air and liquid. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a small-sized UHF tag.

[0004] The utility model adopts the following technical solutions:

[0005] A small-size UHF tag comprises: a chip, a short-circuit ring and an antenna vibrator;

[0006] The short-circuit ring includes four sides, namely a top side, a bottom side, a first side side and a second side side;

[0007] The chip is arranged at the center of the bottom edge of the short-circuit ring;

[0008] A pair of mirror-symmetrical block-shaped antenna elements are provided on both sides of the short-circuit ring, which are respectively a first antenna element and a second antenna element, wherein the first antenna element is connected to a first side edge and a bottom edge of the short-circuit ring, and the second antenna element is connected to a second side edge and a bottom edge of the short-circuit ring;

[0009] A slot is provided at the connection between the first antenna element and the second antenna element and the bottom edge of the short-circuit ring, wherein the opening end of the slot provided at the connection between the first antenna element and the bottom edge of the short-circuit ring faces the direction where the second antenna element is located, and the opening end of the slot provided at the connection between the second antenna element and the bottom edge of the short-circuit ring faces the direction where the first antenna element is located.

[0010] Furthermore, the four sides of the short-circuit ring form a rectangle.

[0011] Furthermore, the four sides of the road loop form an inverted trapezoid.

[0012] Furthermore, the shortest distance between the first side and the second side of the short-circuit ring is in the range of [15, 18] mm.

[0013] Furthermore, the shortest distance between the top edge and the bottom edge of the short-circuit ring is in the range of [2,3] mm.

[0014] Furthermore, the length of the slots ranges from [4,8] mm.

[0015] Furthermore, the width of the slots is in the range of [0.2, 0.5] mm.

[0016] The block structure adopted by the utility model is obtained by deforming the dipole structure of the traditional bending structure. Compared with the traditional bending structure, the block structure has stronger anti-interference ability and can meet the performance requirements of both air and liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of a traditional dipole bending structure.

[0018] Figure 2 Shown is a schematic diagram of the UHF tag structure of a block structure in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0021] This embodiment discloses a small-sized UHF tag, such as Figure 2 As shown, it includes: a chip 1, a short-circuit ring 2 and an antenna element.

[0022] The short-circuit ring 2 includes four sides, namely a top side 21, a bottom side 22, a first side 23 and a second side 24, and the four sides form a hollow quadrilateral. Since the short-circuit ring 2 needs to be bilaterally symmetrical, the shape of the short-circuit ring 2 can be a rectangle or an inverted trapezoid. In this embodiment, the overall size of the label is 22*8 mm, and based on this size, the shortest distance between the first side 23 and the second side 24 of the short-circuit ring 2 is set to a range of [15,18] mm, and the shortest distance between the top side 21 and the bottom side 22 is set to a range of [2,3] mm.

[0023] The chip 1 is disposed at the center of the bottom side 22 of the short-circuit ring 2 .

[0024] A pair of mirror-symmetrical block-shaped antenna elements are provided on both sides of the short-circuit ring 2, which are the first antenna element 31 and the second antenna element 32, wherein the first antenna element 31 is connected to the first side 23 and the bottom 22 of the short-circuit ring 2, and the second antenna element 32 is connected to the second side 24 and the bottom 22 of the short-circuit ring 2. It should be noted that there is a certain interval between the first antenna element 31 and the second antenna element 32.

[0025] A slot 4 is provided at the connection between the first antenna element 31 and the second antenna element 32 and the bottom edge 22 of the short-circuit ring 2, wherein the opening end of the slot 4 provided at the connection between the first antenna element 31 and the bottom edge 22 of the short-circuit ring 2 faces the direction where the second antenna element 32 is located, and the opening end of the slot 4 provided at the connection between the second antenna element 32 and the bottom edge 22 of the short-circuit ring 2 faces the direction where the first antenna element 31 is located.

[0026] In this embodiment, the length range of the slot 4 is set to [4, 8] mm, and the width range is set to [0.2, 0.5] mm.

[0027] The block structure used in this embodiment is obtained by deforming the dipole structure of the traditional bending structure. Compared with the bending structure, the block structure has stronger anti-interference ability and can meet the performance requirements of both air and liquid.

[0028] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A small-size UHF tag, characterized in that: include: Chip, short-circuit ring and antenna element; The short-circuit ring includes four sides, namely a top side, a bottom side, a first side side and a second side side; The chip is arranged at the center of the bottom edge of the short-circuit ring; A pair of mirror-symmetrical block-shaped antenna elements are provided on both sides of the short-circuit ring, which are respectively a first antenna element and a second antenna element, wherein the first antenna element is connected to a first side edge and a bottom edge of the short-circuit ring, and the second antenna element is connected to a second side edge and a bottom edge of the short-circuit ring; A slot is provided at the connection between the first antenna element and the second antenna element and the bottom edge of the short-circuit ring, wherein the opening end of the slot provided at the connection between the first antenna element and the bottom edge of the short-circuit ring faces the direction where the second antenna element is located, and the opening end of the slot provided at the connection between the second antenna element and the bottom edge of the short-circuit ring faces the direction where the first antenna element is located.

2. The small-size UHF tag according to claim 1, characterized in that: The four sides of the short-circuit ring form a rectangle.

3. The small-size UHF tag according to claim 1, characterized in that: The four sides of the road loop form an inverted trapezoid.

4. The small-size UHF tag according to claim 1, characterized in that: The shortest distance between the first side and the second side of the short-circuit ring is in the range of [15, 18] mm.

5. The small-size UHF tag according to claim 1, characterized in that: The shortest distance between the top and bottom edges of the short-circuit ring is in the range of [2,3] mm.

6. The small-size UHF tag according to claim 1, characterized in that: The slot length range is [4,8] mm.

7. The small-size UHF tag according to claim 1, characterized in that: The slot width range is [0.2,0.5] mm.

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