Flexible anti-metal tag antenna

Abstract

The utility model relates to the technical field of radio frequency identification, and discloses a flexible anti-metal tag antenna, which comprises an antenna main body. The antenna main body is integrally formed by a radiation part, a short circuit part and a grounding part; the radiation part is provided with a first coupling groove, a bonding groove, a coupling line and a second coupling groove; the short circuit part is internally provided with a frequency band adjusting part, the frequency band adjusting part is used for adjusting the resonant frequency of the antenna, and the flexible anti-metal tag antenna can be flexibly adjusted according to specific impedance of different electronic tag chips by adopting an innovative impedance matching strategy, so that the efficiency of the antenna is greatly improved, the optimal working state of the antenna is achieved, and the service life of the antenna is prolonged. And secondly, an effective adjustment mechanism can adapt to the difference of RFID (Radio Frequency Identification) frequency bands in different countries and regions, the good performance of the antenna in the global range is ensured, and meanwhile, the excellent performance can be kept in a metal environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency identification technology field, concretely is a kind of flexible metal-resistant label antenna. BACKGROUND

[0002] With the continuous development of wireless radio frequency identification technology (RFID), electronic tags as an important information carrier, have been widely used in logistics, manufacturing, retail, medical and other fields. However, in the actual application process, the performance of traditional dipole antenna in metal environment has obvious shortcomings, which seriously limits its application on the metal surface;

[0003] The traditional dipole antenna has limitations in impedance matching, and the impedance matching strategy adopted is relatively fixed, which cannot meet the diversified chip impedance requirements, resulting in that the antenna efficiency is difficult to reach the best state, and there is lack of effective adjustment mechanism to adapt to such differences, which cannot maintain good performance at different frequency bands, and the anti-metal design is not reasonable in structure, which cannot realize good metal shielding effect while ensuring the performance of the antenna, so a flexible metal-resistant label antenna is proposed to solve the above problems. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a flexible metal-resistant label antenna, which solves the problem that impedance matching cannot be effectively solved, resulting in limited antenna efficiency, lack of dynamic adaptation ability to different frequency bands, poor performance in metal environment and inability to meet the actual application requirements.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a flexible metal-resistant label antenna, comprising an antenna main body;

[0006] The antenna main body is integrally formed by a radiation part, a short-circuit part and a ground part;

[0007] The radiation part is provided with a first coupling groove, a bonding groove, a coupling line and a second coupling groove;

[0008] The short-circuit part is provided with a frequency band adjusting part, and the frequency band adjusting part is used for adjusting the resonant frequency of the antenna;

[0009] When the antenna is folded by the short-circuit part, the radiation part is located above the ground part, the size of the radiation part above is smaller than that of the ground part below, a layer of foam rubber is arranged between the radiation part and the ground part to form a spacing, and the ground part is used for contacting with a metal object.

[0010] Preferably, the radiation part is provided with at least one first coupling groove, and the shape of the first coupling groove can be adjusted to adapt to different electronic tag chip impedance characteristics.

[0011] The coupling line is connected to the radiation part, and its shape can be adjusted to control the current path.

[0012] The second coupling groove can flexibly intercept a small section of the coupling line, for further adjusting the impedance matching between the antenna and the electronic tag chip.

[0013] The bonding groove is used for hot pressing the tag chip through conductive glue, to realize the identification reading function of the tag.

[0014] Preferably, the shape adjustment of the first coupling groove includes length adjustment, to increase the freedom degree of impedance matching between the antenna and different electronic tag chips.

[0015] Preferably, the shape adjustment of the coupling line includes changing its bending degree, straightness, thickness and length, to optimize the current path and the antenna performance.

[0016] Preferably, the frequency band adjustment part in the short-circuit part is marked with an identification line for identifying the folding position of the antenna in the production of the flexible anti-metal tag production equipment.

[0017] Preferably, when the antenna is folded through the short-circuit part, the position of the frequency band adjustment part on the short-circuit part can be flexibly adjusted forward or backward, for adjusting the center frequency of the final flexible anti-metal tag product.

[0018] Advantages

[0019] The utility model provides a kind of flexible anti-metal's label antenna. Compared with prior art, it has the following advantages:

[0020] The flexible anti-metal's label antenna, by adopting innovative impedance matching strategy, can be flexibly adjusted according to the specific impedance of different electronic tag chips, greatly improves the antenna efficiency, makes it reach the best working state, to meet the diversified chip impedance demand, secondly, effective adjustment mechanism can adapt to the difference of RFID frequency band in different countries and regions, ensure the good performance of antenna in the global range, while it can maintain excellent performance in metal environment, by reasonable antenna layout and anti-metal design, reduce the influence of metal surface on antenna performance, realize good metal shielding effect, so as to improve the applicability and reliability of antenna on metal surface. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the whole structure schematic diagram of the utility model.

[0022] In the drawing: 1, antenna main body;10, radiation part;11, first coupling groove;12, bonding groove;131, coupling line;132, second coupling groove;20, short-circuit part;21, frequency band adjustment part;30, ground part. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] As shown in the drawings: Figure 1

[0025] A flexible metal-resistant label antenna, comprising an antenna main body 1;

[0026] The antenna main body 1 is integrally formed and designed by a radiation part 10, a short-circuit part 20 and a grounding part 30, and the grounding part 30 is connected with the radiation part 10 through the short-circuit part 20;

[0027] The radiation part 10 is provided with a first coupling groove 11, a bonding groove 12, a coupling line 131 and a second coupling groove 132;

[0028] The radiation part 10 is provided with at least one first coupling groove 11, and the shape of the first coupling groove 11 can be adjusted to adapt to different electronic label chip impedance characteristics. The shape adjustment of the first coupling groove 11 includes length adjustment to increase the freedom degree of impedance matching between the antenna and different electronic label chips;

[0029] The coupling line 131 is connected to the radiation part 10, and the shape of the coupling line 131 can be adjusted to control the current path. The shape adjustment of the coupling line 131 includes changing its bending degree, straightness, thickness and length to optimize the current path and the antenna performance;

[0030] The second coupling groove 132 can flexibly intercept a small section of the coupling line 131 to further adjust the impedance matching between the antenna and the electronic label chip;

[0031] The bonding groove 12 is used for hot pressing the label chip through conductive glue to realize the identification reading function of the label.

[0032] In the embodiment, the grounding part 30 is connected with the radiation part 10 through the short-circuit part 20. This connection mode ensures that the grounding part 30 can timely conduct the metal interference signals possibly received by the radiation part 10 to the ground, thereby maintaining the state of the radiation part 10 and further improving the performance of the antenna main body 1 in the metal environment;

[0033] ​The shapes of the first coupling slot 11, the second coupling slot 132, and the coupling line 131 affect the distribution of the electromagnetic field, thereby changing the impedance characteristics of the antenna. When the shapes of the first coupling slot 11, the second coupling slot 132, and the coupling line 131 change, the propagation path and mode of the electromagnetic field in them also change accordingly, thereby affecting the coupling effect between the antenna main body 1 and the chip.

[0034] When the length of the first coupling slot 11 increases, the current path becomes longer, causing the impedance to change. When the bonding slot 12 is positioned to the left, the resonant frequency increases. By reasonably designing the size of the first coupling slot 11, the resistance and reactance of the antenna can be changed, so that the antenna and the chip achieve the best conjugate matching state.

[0035] By adjusting the shape, thickness, and size of the coupling line 131 to control the current path and intercept a small section as the second coupling slot 132, the impedance can be adjusted, so that the antenna can perform conjugate matching of impedance according to the impedance conditions of different electronic tag chips, and also play a role in adjusting the resonant frequency position, so as to adapt to all label chips on the market.

[0036] Therefore, when the shapes of the first coupling slot 11, the second coupling slot 132, and the coupling line 131 change, the propagation path and mode of the electromagnetic field in them also change accordingly, thereby affecting the coupling effect between the antenna and the chip.

[0037] By adopting the innovative impedance matching strategy, the antenna efficiency can be greatly improved to achieve the best working state, thereby meeting the diversified chip impedance demand.

[0038] Furthermore,

[0039] In an optional embodiment, the short-circuit part 20 has a frequency band adjusting part 21 therein, and the frequency band adjusting part 21 is used to adjust the resonant frequency of the antenna.

[0040] The frequency band adjusting part 21 in the short-circuit part 20 is marked with an identification line for identifying the folding position of the antenna during production of the flexible anti-metal label production equipment.

[0041] When the antenna is folded by the short-circuit part 20, the radiation part 10 is located above the ground part 30, and the size of the radiation part 10 above is smaller than that of the ground part 30 below. A layer of foam glue is arranged between the radiation part 10 and the ground part 30 to form a spacing, and the ground part 30 is used to contact with a metal object.

[0042] When the antenna is folded by the shorting part 20, the position of the frequency band adjustment part 21 on the shorting part 20 can be flexibly adjusted forward or backward, for adjusting the center frequency of the final flexible anti-metal tag product.

[0043] In this embodiment: since the RFID frequency bands of different regions are different, the position of the frequency band adjustment part 21 can be adjusted to change the folding position of the antenna main body 1.

[0044] The change of the folding position of the antenna main body 1 will affect the coupling relationship between the radiation part 10 and the grounding part 30, and further change the resonance frequency of the antenna. When the folding position is adjusted forward or backward, the electromagnetic field distribution between the radiation part 10 and the grounding part 30 will change, resulting in a change of the equivalent circuit parameters of the antenna, thereby realizing the adjustment of the center frequency.

[0045] Since the size of the grounding part 30 is larger than that of the radiation part 10, it can form a wider shielding area when it is in contact with a metal object. When the electromagnetic signal propagates around the antenna, the grounding part 30 can effectively guide the reflected signal from the metal surface to the ground, reducing the influence of the reflected signal on the performance of the antenna.

[0046] Through the effective adjustment mechanism, the differences of RFID frequency bands in different countries and regions can be adapted to ensure the good performance of the antenna in the global range. At the same time, the excellent performance in the metal environment can be maintained. Through reasonable antenna layout and anti-metal design, the influence of the metal surface on the performance of the antenna is reduced, realizing good metal shielding effect, thereby improving the applicability and reliability of the antenna on the metal surface.

[0047] It should be noted that the size of the antenna tag is 65*35mm, and the 0.8mm thick foam is used to separate the radiation part 10 and the grounding part 30. The coupling line 131 is designed in the shape of the company logo while adjusting the impedance of the antenna, so that it has practical functions while also integrating the cultural connotation of the enterprise, and can maintain the uniqueness and stability of the design.

[0048] Meanwhile, the contents not described in detail in this specification all belong to the existing technology known to those skilled in the art.

Claims

1. A flexible, metal-resistant tag antenna, characterized in that, Includes the antenna body (1); The antenna body (1) is designed to be integrally formed from a radiating part (10), a shorting part (20) and a grounding part (30); The radiating section (10) is provided with a first coupling groove (11), a bonding groove (12), a coupling line (131), and a second coupling groove (132); The shorting section (20) includes a frequency band adjustment section (21), which is used to adjust the resonant frequency of the antenna. When the antenna is folded through the shorting part (20), the radiating part (10) is located above the grounding part (30), the size of the radiating part (10) above it is smaller than the size of the grounding part (30) below it, a layer of foam adhesive is provided between the radiating part (10) and the grounding part (30) to form a gap, and the grounding part (30) is used to contact a metal object.

2. The flexible anti-metal tag antenna according to claim 1, characterized in that: The radiating part (10) is provided with at least one first coupling groove (11), the shape of which is adjustable to suit different electronic tag chip impedance characteristics; The coupling line (131) is connected to the radiating part (10), and its shape is adjustable to control the current path; The second coupling slot (132) can flexibly cut off a small section of the coupling line (131) for further adjusting the impedance matching between the antenna and the electronic tag chip; The bonding groove (12) is used to heat-bond the tag chip with conductive adhesive to realize the tag identification and reading function.

3. The flexible anti-metal tag antenna according to claim 2, characterized in that: The shape adjustment of the first coupling slot (11) includes length adjustment to increase the degree of freedom of impedance matching between the antenna and different electronic tag chips.

4. The flexible anti-metal tag antenna according to claim 2, characterized in that: The shape adjustment of the coupling line (131) includes changing its curvature, straightness, thickness and length to optimize the current path and antenna performance.

5. The flexible anti-metal tag antenna according to claim 1, characterized in that: The frequency band adjustment section (21) in the shorting section (20) is marked with an identification line used to identify the folding position of the antenna during the production of the flexible anti-metal tag.

6. The flexible anti-metal tag antenna according to claim 1, characterized in that: When the antenna is folded through the shorting part (20), the position of the frequency band adjustment part (21) on the shorting part (20) can be flexibly adjusted forward or backward to adjust the center frequency of the final flexible anti-metal tag product.

Images