Radio frequency identification tag antenna having multiple conductors

Abstract

In one embodiment, the present invention discloses a radio frequency identification (RFID) device comprising a first conductive structure and a second conductive structure formed of multiple conductive materials, wherein the multiple conductive materials can switch between a first operating state and a second operating state upon exposure to an event or other stimulus. The second conductive structure is initially functionally coupled to the first conductive structure in the first operating state. However, upon exposure to an event, the first conductive structure changes to alter the behavior of the RFID device. The RFID device may be attached to a substrate such as clothing or fabric, and the event may be a single or multiple occurrence, such as washing, stretching, heating, or exposure of the RFID device to an electrical signal.

Description

[0001] Cross-referencing of related patent applications

[0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 954,965, filed December 30, 2019, which is incorporated herein by reference in its entirety. Technical Field

[0003] This invention generally relates to a radio frequency identification (RFID) device having multiple conductors and a method of manufacturing the same. More specifically, variations in the composition and / or structure of the multiple antennas can alter the performance of the RFID device, thereby responding to external events. Therefore, this specification makes specific references thereto. However, it should be understood that aspects of this invention are equally suitable for other similar applications, devices, and methods of manufacturing. Background Technology

[0004] Generally speaking, Radio Frequency Identification (RFID) refers to the use of electromagnetic energy to simulate a response device (called an RFID "tag" or transponder) to identify itself and, in some cases, provide additional information and / or data stored in the tag. RFID tags typically contain an antenna and analog and / or electronic components, which may include semiconductor devices commonly referred to as "chips," communication electronics, data memory, and control logic. A typical RFID tag usually has a microprocessor electrically connected to the antenna, which acts as a transponder, providing information stored in the chip's memory in response to radio frequency interrogation signals received from a reader (also called an interrogator). In turn, the reader / interrogator converts the radio waves emitted by the RFID device into a form that a computer can use. For passive RFID devices, the energy of the interrogation signal also provides the necessary power for the RFID tag device to operate.

[0005] Radio frequency identification (RFID) tags can be included or attached to any object or item that a user wishes to identify and / or track later, such as products, equipment, individuals, vehicles, machinery, livestock, etc. In some cases, the RFID tag can be attached to the outside of the item using clips, adhesives, tape, or other means; in other cases, the RFID tag can be inserted inside the item, such as being included in packaging or located inside the item or a container of items.

[0006] RFID tags are typically manufactured using a unique identification number, usually a simple serial number consisting of a few bytes and a check digit. This identification number is typically incorporated into the RFID tag during production. Users cannot alter this serial number / identification number, and manufacturers guarantee that each RFID tag serial number is used only once, making it unique. These read-only RFID tags are usually permanently attached to the goods that need to be identified and / or tracked. Once attached, the tag's serial number is associated with the master item in a computer database. When tracking or managing inventory, the microprocessor stores the unique identification data associated with the inventory in the RFID tag. Operators can retrieve the stored data and process or track the inventory using an external receiver / reader.

[0007] One challenge associated with manufacturing RFID devices is providing them with a degree of flexibility and durability without damaging the device. Historically, antenna structures used with RFID devices were made of conductive materials (such as copper, silver, or aluminum) and had various configurations, which could be formed by printing or placing them on objects such as carriers. Unfortunately, such RFID antenna structures were generally not very flexible or durable when subjected to bending forces. Therefore, it would be advantageous to provide an RFID antenna structure that is both durable and flexible, and an RFID antenna structure with multiple conductor structures made of various conductive materials would also allow the RFID device to exhibit different responses to applied events.

[0008] Therefore, there has been a long-standing need in the art for RFID devices and antennas that possess relative flexibility and durability when exposed to bending forces. There has also been a long-standing need in the art for RFID devices with multiple conductors that allow for permanent or reversible alteration of the RFID device's performance.

[0009] Therefore, this invention discloses a radio frequency identification (RFID) device with multiple RFID antenna structures, the performance of which can be altered when the multiple RFID antenna structures are combined. More specifically, the RFID device includes a multi-RFID antenna structure made of various materials, which changes the performance of the RFID device when exposed to external stimuli or events (including but not limited to washing, stretching, heating, or exposure to received electrical signals). Summary of the Invention

[0010] A brief summary of the invention is provided below to offer a basic understanding of certain aspects of the disclosed invention. This summary is not intended to be extensive, nor is it intended to identify key / essential elements of the invention or to define its scope. Its sole purpose is to present some concepts of the invention in a simplified form, thus laying the groundwork for the detailed description section that follows.

[0011] This invention describes an RFID device comprising a first conductive structure, a second conductive structure, and an RFID chip operatively coupled to the first conductive structure. In some embodiments, the first conductive structure is made of a first conductive material and has a first configuration, and the second conductive structure is made of a second conductive material and has a second configuration. In some embodiments, when the RFID device is in a first operating state, the first conductive structure and the second conductive structure are electrically connected to each other. Alternatively, in some embodiments, the first conductive structure and the second conductive structure are initially coupled to each other, with or without mechanical connection, via an ohmic resistor or reactive power.

[0012] In some embodiments, when exposed to external events or stimuli (including but not limited to washing, stretching, heating, or exposure to received electrical signals), conductive communication between the first and second conductive structures is interrupted, allowing the RFID device to be reconfigured to a second operating state. Depending on the materials used to construct the first and second conductive structures and the nature of the external event or stimulus, the change between the first and second operating states can be permanent or reversible. Furthermore, the state change from the first to the second operating state can occur after a single external event, or after multiple or a series of events, depending on the construction of the first and second conductive structures and the way the conductive structures are connected to a substrate (such as clothing, packaging, or other items).

[0013] In another embodiment, the radio frequency identification (RFID) device includes a first conductive structure, a second conductive structure, and an RFID chip. In some embodiments, the first conductive structure is made of a first conductive material and has a first configuration, and the second conductive structure is preferably made of a second conductive material and has a second configuration. Furthermore, in some embodiments, the second conductive structure is non-mechanically coupled to the first conductive structure via a magnetic field, a capacitive electric field, or a combination of magnetic and capacitive electric fields, and the first and second conductive structures are placed on a substrate (such as a wearable item or fabric).

[0014] In some embodiments, the first conductive structure is substantially circular in configuration in the first operating state, but it will deform when exposed to external events or other stimuli, causing the radio frequency identification device to change from the first operating state to the second operating state.

[0015] In another embodiment, the RFID device includes a first conductive structure, a second conductive structure, and an RFID chip. In some embodiments, the first conductive structure adopts a first structural configuration, and the second conductive structure adopts a second structural configuration. Furthermore, in some embodiments, the first and second conductive structures are respectively connected to a substrate, wherein a specific mounting environment alters the connection between these conductive structures, thereby causing different responses to external events or stimuli, regardless of whether the first and second conductive structures are made of the same conductive material. For example, but not as a limitation, when connected to a substrate, the first conductive structure may be elastically encapsulated in the substrate, and the second conductive structure may be rigidly encapsulated in the substrate or otherwise connected to the substrate. Alternatively, by further example and not as a limitation, the first and second conductive structures are unencapsulated and coupled to a common base substrate so that these structures respond differently to external events or other stimuli.

[0016] To achieve the foregoing and related objectives, this invention describes certain illustrative aspects of the disclosed invention and provides the following description and drawings. However, these aspects illustrate only a few of the various ways in which the principles of this invention can be employed and are intended to include all such aspects and their equivalents. Other advantages and novel features will become apparent from the following detailed description, taken in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 A perspective view of various conductive materials used in the disclosed architecture for radio frequency identification devices.

[0018] Figure 2 This is a schematic diagram of an RFID device comprising a first conductive structure (made of a first conductive material), an RFID chip, and a second conductive structure (made of a second conductive material) in the disclosed architecture.

[0019] Figure 3 The diagram shows an RFID device with a disclosed architecture including a first conductive structure, an RFID chip, and a second conductive structure, wherein the first conductive structure includes a shunt for initially connecting the first conductive structure and the second conductive structure.

[0020] Figure 4 This is a schematic diagram of an RFID device comprising a first conductive structure (having a first operating state), an RFID chip, and a second conductive structure (having a second operating state) in the disclosed architecture.

[0021] Figure 5A This is a diagram illustrating the change in resistance of the first conductive structure of an RFID device after exposing it to multiple repeated external events in the disclosed architecture.

[0022] Figure 5B This is a diagram illustrating that the resistance of the second conductive structure of the RFID device in the disclosed architecture does not change after exposure to multiple repeated external events.

[0023] Figure 6A Another illustration of how the resistance of the first conductive structure of the RFID device in the disclosed architecture changes after being exposed to multiple repetitive events.

[0024] Figure 6B Another illustration of the resistance change of the second conductive structure of the RFID device in the disclosed architecture after exposure to multiple repetitive events.

[0025] Figure 7A This is a schematic diagram of the RFID device operating in the first working state within the disclosed architecture.

[0026] Figure 7B This is a schematic diagram of the RFID device operating in the second working state within the disclosed architecture.

[0027] Figure 8 This is a schematic diagram of an RFID device comprising a first conductive structure (made of a first conductive material), an RFID chip, and a second conductive structure (made of a second conductive material) in the disclosed architecture.

[0028] Figure 9A This is a schematic diagram of a radio frequency identification device that includes the first conductive structure (configured as a basic circle in the first operating state) in the disclosed architecture.

[0029] Figure 9B This is a schematic diagram of a radio frequency identification (RFID) device in the disclosed architecture, wherein the first conductive structure deforms in response to an external event (or some other stimulus) to enable the RFID device to operate in a second operating state.

[0030] Figure 10A This is a schematic diagram of an alternative embodiment of the radio frequency identification device in the disclosed architecture, wherein the first conductive structure partially overlaps with the second conductive structure in a first operating state.

[0031] Figure 10B This is a schematic diagram of an alternative embodiment of the RFID device described in the disclosed architecture, wherein the first conductive structure response event no longer overlaps with the second conductive structure, enabling the RFID device to operate in a second operating state.

[0032] Figure 11 This is a schematic diagram of a radio frequency identification (RFID) device in the disclosed architecture, which includes a first conductive structure and a second conductive structure made of the same conductive material and respectively connected to a substrate.

[0033] Figure 12 The illustration shows an alternative embodiment of a radio frequency identification (RFID) device in the disclosed architecture, the RFID device comprising a first conductive structure, an RFID chip, and a second conductive structure, wherein the first conductive structure and the second conductive structure are made of the same conductive material and are respectively connected to a substrate. Detailed Implementation

[0034] The invention will be described with reference to the accompanying drawings, wherein the same reference numerals always denote the same components. In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of the invention. However, it will be apparent, however, that the invention may be practiced without these specific details. In other instances, well-known structures and apparatuses are shown in block diagram form to illustrate the invention.

[0035] As described above, there has been a long-standing need in the art for a radio frequency identification (RFID) tag or device that connects to clothing, fabric, or wearable items that may be subjected to bending forces and includes an antenna structure formed from various conductive materials and different configurational components. More specifically, the RFID device may include various conductive materials and / or configurations that enable the performance of the RFID device to change (reversibly or permanently) with respect to external events or other stimuli (including but not limited to washing, stretching, etc.).

[0036] First, please refer to the attached diagram. Figure 1 This is a perspective view of various conductive materials and potential configurations for an RFID device. This RFID device may include, by example (but not limitation), (a) a wire 10 made of copper or other conductive material; (b) a conductive foil material 20 that has been cut (e.g., laser-cut or molded) or etched, including but not limited to aluminum or copper; (c) a printed conductor 30, such as a base coating (e.g., ink) of particles of copper, silver, graphene, or other inorganic or organic conductive materials or combinations thereof; or (d) a metal mesh 40. While a variety of conductive materials and configurations can adapt to events or external stimuli to some extent, greater flexibility can be provided to the RFID device by using two or more conductors as part of a common antenna structure.

[0037] Figure 2 This is a schematic diagram of a radio frequency identification (RFID) device 100 having multiple conductors. More specifically, the RFID device 100 includes an RFID chip 110, a first conductive structure 120, and a second conductive structure 130. When in a first operating state 100A, the second conductive structure 130 is operatively coupled to the first conductive structure 120, as shown below. Figure 7AAs shown, the RFID chip 110 is operatively coupled to the second conductive structure 130. The initial coupling between the first conductive structure 120 and the second conductive structure 130 may be different. In some embodiments, the initial coupling between the first conductive structure 120 and the second conductive structure 130 is conductive coupling.

[0038] In some embodiments, the first conductive structure 120 is made of a first conductive material, and the second conductive structure 130 is made of a different conductive material. Furthermore, in some embodiments, the first conductive structure 120 adopts a first configuration, and the second conductive structure 130 preferably adopts a different configuration. For example, the first conductive structure 120 may be a pair of conductive ink printing areas, such as... Figure 1 The printed conductor 30 shown, the second conductive structure 130 can be a wire 10 (e.g., Figure 1 (As shown). Furthermore, because the wires overlap a portion of the pair of conductive ink printed areas, the wires of the second conductive structure 130 are electrically coupled to the pair of printed areas of the first conductive structure 120. Alternatively, in some embodiments, this coupling can be achieved via a capacitor.

[0039] Figure 3 This illustration shows an RFID device 100 comprising an RFID chip 110, a first conductive structure 120, and a second conductive structure 130, wherein the first conductive structure 120 further includes a shunt member 122 for initial connection between the first conductive structure 120 and the second conductive structure 130. More specifically, when the RFID device 100 is in a first operating state, the shunt member 122 of the first conductive structure 120 partially overlaps with the second conductive structure 130.

[0040] exist Figure 2 and Figure 3 In the two configurations, due to the use of different materials and / or different configurations, the first conductor 120 and the second conductor 130 may produce different responses to external events. For example, exposure to an external event (or a series of external events) may cause the RFID device 100 to change from a first operating state to a second operating state. Depending on the materials used to construct each conductive structure, the configuration of the conductive structure, the type of external event, the number of external events, and / or combinations thereof, the change in operating state may be permanent or reversible.

[0041] As described above, external events can be single events or a series of events, including but not limited to washing, stretching, heating, receiving electrical signals, etc. For example, if the first conductive structure 120 is water-soluble, such as conductive ink with a water-soluble adhesive, the conductive ink can be removed by a washing event, thereby changing the characteristics of the RFID device 100. More specifically, as the first conductive structure 120 is washed away and removed (or partially removed), the performance of the RFID device 100 undergoes a reversible or permanent change.

[0042] Figure 4 This is a schematic diagram of an RFID device 100, which includes an RFID chip 110, a first conductive structure 120 having a first operating state, a second conductive structure 130 having a second operating state, and a performance change responsive to the removal of the first conductive structure 120. Before the removal of the first conductive structure 120, the overall antenna configuration of the first conductive structure 120 and the second conductive structure 130 is longer. In other words, depending on the performance of the first conductive structure 120 and the second conductive structure 130, the first conductive structure 120 and the second conductive structure 130 operate as an RFID series antenna with two tuning states. Therefore, the RFID device 100 operates in the first operating state at frequency f1 (… Figure 7A It operates at 100A, for example, in the region of 902MHz to 928MHz. When the first conductive structure 120 is removed, the entire antenna configuration is shortened, thus in the second operating state ( Figure 7B At 100B), the optimal frequency rises to f2. Frequency f2 may be a frequency band in which the RFID system does not operate; therefore, the effect of changing it is to block or reduce the operating range of the 902MHz-928MHz band.

[0043] Figure 5A This illustration shows the change in resistance of the first conductive structure of an RFID device after it has been exposed to multiple repeated external events. Figure 5B This is an illustration showing that the resistance of the second conductive structure of an RFID device remains unchanged after being exposed to the same multiple repeated external events. More specifically, Figure 5A and Figure 5B This illustrates how key operating parameters (such as the resistance of the first conductive structure 120 material) can change with exposure to external events compared to the resistance of the material of the second conductive structure 130. In this particular example, a single event (such as washing the RFID device 100) can cause the first conductive structure 120 to shift from low resistance to high resistance (e.g., ...). Figure 5A As shown), the second conductive structure 130 remains relatively unaffected after exposure to the first event (as shown). Figure 5B As shown). Figure 5A and Figure 5B As shown, after the first event, the resistance remains relatively constant with repeated events (such as other washing cycles).

[0044] Figure 6A Another illustration showing the change in resistance of the first conductive structure of an RFID device after exposure to multiple repeated events. Figure 6B This is another illustration showing the change in resistance of the second conductive structure of an RFID device after exposure to multiple identical repetitive events. More specifically, Figure 6A and Figure 6B Alternating variations in the resistance modes of the materials of the first conductive structure 120 and the second conductive structure 130 in response to multiple identical or similar events (such as multiple washing cycles) are shown. In this particular example, as Figure 6A As shown, the resistance of the first conductive structure 120 material remains relatively low after exposure to the first two events, then rises with the third event, and plateaus after the fourth event. In contrast, as Figure 6B As shown, the resistance of the second conductive structure 130 gradually increases in the first three events, and then tends to stabilize during the fourth event.

[0045] Figure 7A This is a schematic diagram of the radio frequency identification device 100 operating in its first operating state 100A. Figure 7B This is a schematic diagram illustrating the operation of the radio frequency identification device 100 in its second operating state 100B. More specifically, Figure 7A and Figure 7B The illustration shows how a first conductive structure 120 and a second conductive structure 130, comprising different materials and configurations, can alter the behavior or performance of an RFID device in response to external events. In this particular case, the second conductive structure 130 (illustrated as a wire antenna) is initially in contact with the first conductive structure 120 (illustrated as a pair of printed conductors). For example, the second conductive structure 130 may be sewn onto a substrate (such as fabric), while the first conductive structure 120 may be attached to the substrate surface.

[0046] When the RFID device is in the first operating state 100A, the first conductive structure 120 and the second conductive structure 130 are coupled together via an ohmic resistor or a reactive power method. Alternatively, the first conductive structure 120 and the second conductive structure 130 can be mechanically coupled. If the fabric is part of the garment that stretches when worn, the RFID device is in the first operating state 100A when the garment is hanging in a store. When in the first operating state 100A, the frequency (e.g., ...) Figure 4 (As shown in A) will be adjusted to the maximum range in a relatively light dielectric load environment for the RFID device.

[0047] Furthermore, when an external event is stretching the clothing with the RFID device, the first conductive structure 120 and the second conductive structure 130 are stretched and pulled apart when the clothing is worn, which in turn moves the RFID device to the second operating state 100B. Additionally, when the RFID device is in the first operating state 100A, the presence of a human-related medium causes the operating frequency of the RFID device 100 to drop from its optimal value. However, the RFID device in the second operating state 100B can effectively shorten the overall antenna structure, making it more suitable for operation near a person. As described above, a response to a single event may cause a change from operation in the first operating state to operation in the second operating state. In this example, if the wires of the second conductive structure 130 are mechanically bonded to the printed ink of the first conductive structure 120, stretching the clothing will cause the ink to detach or deform, resulting in an irreversible change in the operating performance of the RFID device 100. Alternatively, the wires of the second conductive structure 130 may be able to slide freely on the printed ink of the first conductive structure 120, making this process reversible.

[0048] Figures 8-9B This illustration shows an alternative embodiment of an RFID device 200 comprising an RFID chip 210, a first conductive structure 220, and a second conductive structure 230. More specifically, the RFID device 200 employs two independent antenna components made of different materials, coupled via a magnetic field, a capacitive electric field, or a combination of both. When the RFID device 200 is in a first operating state, the second conductive structure 230 is operationally coupled to the first conductive structure 220, as shown below. Figure 9A As shown, the initial coupling between the first conductive structure 220 and the second conductive structure 230 is typically a non-mechanical coupling 240, such as a magnetic field, a capacitive electric field, or a combination of magnetic and capacitive electric fields. The RFID chip 210 is also functionally coupled to the first conductive structure 220 and / or the second conductive structure 230, which are typically placed on a substrate, such as the fabric used in clothing.

[0049] As previously mentioned, the first conductive structure 220 is typically made of a first conductive material, while the second conductive structure 230 is made of a different conductive material. Furthermore, the first conductive structure 220 and the second conductive structure 230 have different configurations with different mechanical properties. For example, the first conductive structure 220 may be a stretchable conductive ring, while the second conductive structure 230 may be a relatively rigid wire. External events (such as tensile forces) will cause changes in the coupling 240.

[0050] For example, in its undeformed state, the first conductive structure 220A of the RFID device in its first operating state 200A can be a basic circular configuration with initial coupling 240A, such as... Figure 9AAs shown. In response to the aforementioned stretching event, the first conductive structure 220 may deform, as... Figure 9B As shown. In the second operating state 200B, the deformed first conductive structure 220B of the RFID device can be a deformation of a ring between a circle and an ellipse. The deformation of the first conductive structure 220B causes a change in the coupling 240B because the deformed first conductive structure 220B is pulled away from the second conductive structure 230, thereby changing the performance of the RFID device 200, as previously described.

[0051] Figure 10A This is a schematic diagram of an alternative embodiment of a radio frequency identification (RFID) device, wherein the first conductive structure 220 partially overlaps with the second conductive structure 230 in the first operating state 200A. Figure 10B This is a schematic diagram of an alternative embodiment of the RFID device, wherein the first conductive structure 220 no longer overlaps with the second conductive structure 230 in response to an event, enabling the RFID device to operate in a second operating state 200B. Each of the first conductive structure 220 and the second conductive structure 230 may further include an RFID chip 210 operatively coupled thereto. More specifically, the first conductive structure 220 may typically be U-shaped and serve as a single component, and may include connectors, wherein the first conductive structure 220 partially overlaps with the second conductive structure 230 in the wiring configuration of the RFID device in the first operating state 220A. In response to an external event (such as tension), the first conductive structure 220 moves away from the second conductive structure 230, so that the two conductive structures of the RFID device no longer overlap in the second operating state 220B, thereby reducing the coupling between the first conductive structure 220 and the second conductive structure 230.

[0052] In alternative embodiments, such as Figure 11 and Figure 12 As shown, the RFID device 300 employs two independent antenna components made of the same material, but each antenna component has a different configuration and is packaged or connected to the substrate in different ways. More specifically, in a first operating state, the RFID device 300 includes an RFID chip 310 operatively coupled to a first conductive structure 320 and a second conductive structure 330 operatively coupled to the first conductive structure 320. The initial coupling between the first conductive structure 320 and the second conductive structure 330 is typically non-mechanical coupling, such as a magnetic field, a capacitive electric field, or a combination of magnetic and capacitive electric fields. The first conductive structure 320 and the second conductive structure 330 are respectively connected to a substrate 340 (such as fabric used in clothing) so that the first conductive structure 320 and the second conductive structure 330 respond differently to events.

[0053] In this particular embodiment, the first conductive structure 320 and the second conductive structure 330 are typically made of different conductive materials. However, the first conductive structure 320 and the second conductive structure 330 have different configurations with different mechanical properties. For example, the first conductive structure 320 may be a conductive ring movably connected to the substrate 340, and the second conductive structure 330 may be a wire initially rigidly connected to the substrate 340, such as... Figure 11 As shown. Alternatively, the first conductive structure 320 can be a conductive ring that is not movably connected to the substrate 340, and the second conductive structure 330 can be a dipole antenna component that is connected to the substrate 340 in a relatively freely movable manner, such as... Figure 12 As shown. Events (such as forces such as tension) will change the coupling between the first conductive structure 320 and the second conductive structure 330.

[0054] like Figure 11 As shown, the ring of the first conductive structure 320 is elastically encapsulated in a first encapsulation portion 342, which is then connected to a substrate 340. The material of the first encapsulation portion 342 is preferably a stretchable material, allowing the first conductive structure 320 to move on or within the substrate 340 upon exposure to an event (such as stretching). The wires of the second conductive structure 330 are relatively rigidly encapsulated in a second encapsulation portion 344, which is also connected to the substrate 340. When the RFID device 300 is under pressure, exposed to heat, or experiences other external events, the ring of the first conductive structure 320 may move relative to the wires of the second conductive structure 330, or its shape or position may be twisted, thereby altering the coupling between the first conductive structure 320 and the second conductive structure 330. This change can alter the performance of the RFID device 300, as previously described.

[0055] like Figure 12 As shown, the first conductive structure 320 and the second conductive structure 330 can be unencapsulatedly connected to the substrate 340 so that each conductive structure responds differently to external events such as stretching. For example, the dipole antenna structure of the second conductive structure 330 can be sewn onto the fabric of the substrate 340 so that it can move relatively freely when the fabric is stretched. In contrast, the loop antenna of the first conductive structure 320 can be glued to the fabric of the substrate 340 so that it will not move unless sufficient force is applied to irreversibly detach the first conductive structure 320 from the fabric. As previously described, the purpose of changing the performance or tuning of the RFID device 300 in response to an event can be to retune the RFID device 300. Examples of this purpose include adjusting the RFID device 300 to work better when close to a person, reducing long-range readings to protect consumer privacy while retaining short-range reading capabilities for users to scan items themselves, or completely stopping the RFID device 300 from operation.

[0056] Examples of the described subject matter are also included above. Of course, it is impossible to describe every possible combination of components or methods in describing the subject matter, but those skilled in the art will recognize that many further combinations and permutations are possible for the described subject matter. Therefore, the subject matter is intended to cover all such changes, modifications, and variations within the spirit and scope of the appended claims. Furthermore, with regard to the term "includes" as used in the detailed description or the claims, this term is intended to be included in a manner similar to the term "comprising," which is used as a transitional word in the claims.

Claims

1. A radio frequency identification device, comprising: First conductive structure; A second conductive structure that is operationally coupled to the first conductive structure in the first operating state; A radio frequency identification chip that is functionally coupled to the second conductive structure; as well as Substrate; The second conductive structure is sewn onto the substrate, and the first conductive structure is connected to the surface of the substrate. The first conductive structure includes a pair of conductive ink printed areas, and the second conductive structure includes wires. The wires of the second conductive structure are electrically coupled to the pair of printed areas of the first conductive structure by overlapping a portion of the pair of conductive ink printed areas.

2. The radio frequency identification device according to claim 1, wherein, The first conductive structure is made of a first conductive material, and the second conductive structure is made of a different conductive material.

3. The radio frequency identification device according to claim 1, wherein, The first conductive structure has a first configuration, and the second conductive structure has a different configuration.

4. The radio frequency identification device according to claim 1, wherein, The first conductive structure includes a shunt component.

5. The radio frequency identification device according to claim 1, wherein, Exposure to the event will cause the radio frequency identification device to change from a first operating state to a second operating state.

6. The radio frequency identification device according to claim 5, wherein, The transition from the first working state to the second working state is reversible.

7. The radio frequency identification device according to claim 5, wherein, The change from the first working state to the second working state is permanent.

8. The radio frequency identification device according to claim 5, wherein, The event includes at least one of the following: washing, stretching, heating, or receiving an electrical signal.

9. The radio frequency identification device according to claim 1, wherein, The performance level of the radio frequency identification device changes when the first conductive structure is removed.

10. The radio frequency identification device according to claim 1, wherein, The first conductive structure is water-soluble.

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