TWI509523B - Rfid tag and method for adjusting operation frequency thereof - Google Patents

Description

Radio frequency tag and method for adjusting its operating frequency

The invention relates to a radio frequency tag and a method for adjusting the operating frequency thereof, and in particular to a radio frequency tag capable of changing an operating frequency according to different carriers and a method for adjusting an operating frequency thereof.

Generally, when designing a radio frequency tag, the material of the carrier of the radio frequency tag is pre-considered, and the specific operating frequency required for the radio frequency tag is designed according to the thickness of the carrier.

For example, when a radio frequency tag is attached to a glass, since the glass has a high dielectric constant material, the radio frequency tag is affected by the glass, and the operating frequency of the radio frequency tag is changed according to the thickness of the glass. Generally, the thinner the glass thickness, the higher the operating frequency of the radio frequency tag. This change makes the operating frequency signal emitted by the radio frequency tag unable to match the original designed radio frequency reader, thereby reducing the reading efficiency.

In view of the above problems, an aspect of the present invention is to provide a no The method of adjusting the line RF tag and its operating frequency to improve the defect that the operating frequency cannot be adjusted at any time according to the carrier of the radio frequency tag.

According to an embodiment of the invention, the radio frequency tag includes a substrate, an antenna unit disposed on the substrate, and a slidable conductor structure. The slidable conductor structure comprises a slide rail and a conductor, the conductor is disposed on the substrate, and the conductor is slidably disposed on the slide rail, wherein the conductor is not electrically connected to the antenna unit, and is slidable relative to the antenna unit to change the radio frequency tag. Operating frequency.

According to another embodiment of the present invention, the antenna unit has two extension portions, and the guiding system is disposed between the two extension portions and is slidable relative to the two extension portions to utilize the capacitive coupling effect between the conductor and the second extension portion. To change the operating frequency of the radio frequency tag.

In accordance with still another embodiment of the present invention, the antenna unit has a bent portion defining a loop area, wherein the conductor is slidable relative to the curved portion to cover a portion of the loop area to change the operating frequency of the radio frequency tag.

According to still another embodiment of the present invention, the conductor has a predetermined shape, and the pattern of the predetermined shape is a geometric figure.

According to another embodiment of the invention, the conductor has an adhesive layer for adhering to the substrate.

According to another aspect of the present invention, a method for adjusting a radio frequency tag operating frequency is provided. In one embodiment, a radio frequency tag is first provided, the radio frequency tag comprising a substrate, an antenna unit disposed on the substrate, and a slidable conductor structure. The slidable conductor structure includes slide rails and guides The body is disposed on the substrate, and the conductor is slidably disposed on the sliding rail, wherein the conductor is not electrically connected to the antenna unit. After the step of providing the radio frequency tag, an adjustment step is performed to move the conductor to the preset position by using the slide rail to adjust the operating frequency of the radio frequency tag to the preset frequency value.

According to another embodiment of the present invention, the method further includes providing a carrier and calculating a preset frequency value according to a material of the carrier, wherein the carrier carries the radio frequency tag.

According to still another embodiment of the present invention, the antenna unit has two extension portions, and the guiding system is disposed between the two extension portions. The adjusting step is to slide the conductor relative to the two extension portions to utilize the conductor and the second extension portion. The capacitive coupling effect is used to change the operating frequency of the radio frequency tag.

According to still another embodiment of the present invention, the antenna unit has a curved portion defining a loop area, wherein the adjusting step causes the conductor to slide relative to the curved portion to cover a portion of the loop area to change the radio frequency tag. Operating frequency.

In accordance with another embodiment of the present invention, the conductor includes at least one hollow portion, the pattern of the hollow portion being geometric.

Therefore, one of the advantages of the present invention is to provide a method for adjusting a radio frequency tag and its operating frequency by using a conductor that is slid on a slide rail to move to a preset position, thereby changing the operating frequency of the radio frequency tag.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

100, 200, 300‧‧‧ radio frequency tags

110, 210, 310, 340‧‧‧ substrates

120, 220, 320‧‧‧ antenna units

121, 321a‧‧‧ Extension

130, 230, 330a, 330b‧‧‧ slidable conductor structure

131, 231, 331a, 331b‧‧‧ slide rails

132, 232, 332a, 332b, 432‧‧‧ conductor

221, 321b‧‧‧bend

433a, 433b, 433c, 433d‧‧‧ hollow parts

440‧‧‧ Carrier Board

500‧‧‧Adjustment method of operating frequency

510‧‧‧Procedures for providing carriers

520‧‧‧ Calculation steps

530‧‧‧Procedures for providing radio frequency tags

540‧‧‧Adjustment steps

Fig. 1a is a top plan view showing a radio frequency tag according to a first embodiment of the present invention.

FIG. 1b is a top view showing the overlapping area of the conductor of the radio frequency tag according to the first embodiment of the present invention.

Figure 2a is a top plan view of a radio frequency tag in accordance with a second embodiment of the present invention.

Figure 2b is a top plan view of another radio frequency tag in accordance with a second embodiment of the present invention.

Figure 3a is a top view of a radio frequency tag in accordance with a third embodiment of the present invention.

Figure 3b is a top plan view showing the arrangement of two conductors on another substrate of the radio frequency tag in accordance with the third embodiment of the present invention.

4a to 4d are schematic top views showing different conductor structures of a radio frequency tag in accordance with a fourth embodiment of the present invention.

FIG. 5 is a schematic diagram showing the steps of a method for adjusting the operating frequency of a radio frequency tag according to the present invention.

The making and using of the embodiments of the invention are discussed in detail below. However, it will be appreciated that the embodiments provide many applicable inventive concepts that can be implemented in a wide variety of specific content. The specific embodiments discussed are illustrative only and are not intended to limit the scope of the invention.

Please refer to Figures 1a and 1b, and Figure 1a shows a diagram according to the present invention. FIG. 1 is a top plan view of the radio frequency tag of the first embodiment and FIG. 1b is a plan view showing the overlapping area of the conductor of the radio frequency tag according to the first embodiment of the present invention. The radio frequency tag 100 includes a substrate 110, an antenna unit 120 disposed on the substrate 110, and a slidable conductor structure 130. The slidable conductor structure 130 includes a slide rail 131 and a conductor 132 disposed on the substrate 110. The conductor 132 is slidably disposed on the slide rail 131. The conductor 132 is not electrically connected to the antenna unit 120 and is slidable relative to the antenna unit 120 to change the operating frequency of the radio frequency tag 100.

In the first embodiment, the antenna unit 120 has two extensions 121, and the conductors 132 are disposed between the two extensions 121 and slide relative to the two extensions 121. Wherein, when the conductor 132 moves toward the extending portion 121 of the antenna unit 120, a overlapping area is formed between the extending portion 121 and the conductor 132. Since the conductor 132 is not in electrical contact with the antenna unit 120, a portion where the overlap area is formed between the extension portion 121 and the conductor 132 may cause a capacitive coupling effect to lower the operating frequency of the radio frequency tag 100. For example, the radio frequency tag 100 of the present invention is originally designed for use on a carrier having a thickness of 8 cm, but is actually used on a carrier having a thickness of 5 cm, so that if the conductor 132 has not been overlapped to the extension portion 121 of the antenna unit 120, At the same time, the operating frequency of the radio frequency tag 100 is higher than the originally designed frequency, so that the radio frequency reader cannot receive the signal transmitted by the radio frequency tag 100 at the original designed operating frequency. At this time, by sliding the conductor 132 in the direction of the extending portion 121, a capacitive coupling effect is generated between the conductor 132 and the extending portion 121 to lower the operating frequency of the radio frequency tag 100. Therefore, the radio frequency tag 100 can be under the standard of the preset frequency value. Send a signal. It is specifically mentioned that the coincidence referred to herein refers to the overlapping appearance produced by the top view of FIG. 1b when the conductor 132 is moved toward the extending portion 121 in the first embodiment, but actually the conductor 132 The antenna unit 120 is still not electrically connected. Similarly, the overlap area refers to the area of overlap between the conductor 132 and the extension 121 when viewed from the top view of FIG. 1b.

In addition, the conductor 132 may have a strip (not shown) disposed on the back side of the conductor 132. In this embodiment, after the conductor 132 is moved to the preset position, the user can tear off the release film on the strip to adhere the conductor 132 to the substrate 110 through the adhesive layer on the strip. Fixed adjusted operating frequency.

Referring to FIGS. 2a and 2b, FIG. 2a is a plan view of a radio frequency tag according to a second embodiment of the present invention, and FIG. 2b is a plan view showing another radio frequency tag according to a second embodiment of the present invention. The patterns of the antenna elements shown in FIGS. 2a and 2b are different, but each has a curved portion. The radio frequency tag 200 includes a substrate 210, an antenna unit 220 disposed on the substrate 210, and a slidable conductor structure 230. The slidable conductor structure 230 includes a slide rail 231 disposed on the substrate 210 and sliding on the slide rail 231. Conductor 232. The antenna unit 220 has a curved portion 221 having a loop area to generate an imaginary impedance of the antenna unit 220. The conductor 232 can slide relative to the curved portion 221 to cover the loop area of the portion to change the imaginary impedance of the antenna unit 220, thereby adjusting the operating frequency of the radio frequency tag 200.

For example, the original design of the radio frequency tag 200 of the present invention It is used on a carrier having a thickness of 5 cm, but is actually used on a carrier having a thickness of 8 cm, so if the imaginary impedance of the antenna unit 220 is changed when the conductor 232 has not covered the loop area, the operating frequency of the radio frequency tag 200 It will be lower than the original design frequency, causing the radio frequency reader to be unable to receive the signal transmitted by the radio frequency tag 200 at the originally designed operating frequency. At this time, the sliding conductor 232 reduces the imaginary impedance of the antenna unit 220 with the loop area of the covering portion, thereby increasing the operating frequency of the radio frequency tag 200. Therefore, the radio frequency tag 200 can transmit a signal under a standard that meets a preset frequency value.

Please refer to FIG. 3a. FIG. 3a is a top view of a radio frequency tag according to a third embodiment of the present invention. The radio frequency tag 300 includes a substrate 310, an antenna unit 320 disposed on the substrate 310, and slidable conductor structures 330a, 330b. The slidable conductor structures 330a, 330b include slide rails 331a, 331b and conductors 332a, 332b disposed on the substrate 310. The third embodiment is a combination of the first embodiment and the second embodiment, that is, the extension portion 321a of the antenna unit 320 is overlapped by the conductor 332a according to the material or thickness of the carrier to reduce the operating frequency of the radio frequency tag 300 or The loop area of the bent portion 321b of the antenna unit 320 is covered with the conductor 332b to increase the operating frequency of the radio frequency tag 300.

In addition, the conductors 332a, 332b may have a predetermined shape, and the pattern of the predetermined shape may be a geometric figure such as a triangle, a square or a trapezoid or the like. In the third embodiment, for example, the predetermined shape of the conductors 332a, 332b is trapezoidal, and the oblique side of the trapezoid is disposed toward the extending portion 321a or the curved portion 321b, whereby the operating frequency of the radio frequency tag 300 is finely adjusted. Specifically, regardless of The operating frequency of the radio frequency tag 300 is reduced by the overlapping area between the conductor 332a and the extending portion 321a, or the loop area of the covered portion of the conductor 332b is increased to increase the operating frequency of the radio frequency tag 300, and both slides with the conductors 332a, 332b. The coincidence area and the coverage loop area are related. In other words, if the conductors 332a, 332b of the third embodiment are trapezoidal and the conductors 132, 232 of the first embodiment or the second embodiment are rectangular, if the conductors 132, 232, 332, 332b are all moved the same distance, the conductor The amount of overlap between the overlap area and the cover loop area generated by 332a, 332b is smaller than that of the conductors 132, 232, and thus has the effect of fine-tuning the operating frequency of the radio frequency tag.

In addition, the conductors 330a, 330b in the third embodiment may also have another aspect as shown in FIG. 3b, and FIG. 3b illustrates the setting of the radio frequency tag according to the third embodiment of the present invention on another substrate. A schematic view of the top view of the two conductors. That is, the conductors 332a, 332b are disposed on the substrate 340, and the conductors 332a, 332b are respectively slidably disposed on the slide rails 331a, 331b, thereby synchronously adjusting the positions of the conductors 332a, 332b to change the effect of the operating frequency of the radio frequency tag.

Referring to FIGS. 4a to 4d, FIGS. 4a to 4d are plan views showing different conductor structures of a radio frequency tag according to a fourth embodiment of the present invention. In the fourth embodiment, the conductors 432 are disposed on the carrier 440, and the carrier 440 is coupled to the rails to adjust the position of the conductors 432 using the rails. The conductor 432 can have at least one hollow 433a, 433b, 433c, 433d to fine tune the operating frequency of the radio frequency tag. Similarly, similar hollow portions 433a, 433b, 433c, 433d can also be used to change the impedance of the imaginary part of the conductor.

The invention further provides a method for adjusting the operating frequency of a radio frequency tag. Please refer to FIG. 5, which is a flow chart showing a method for adjusting the operating frequency of the radio frequency tag according to the present invention. In the first method of adjusting the operating frequency 500, a step 510 of providing a carrier is first performed to provide a carrier for carrying the subsequent radio frequency tag 100 or 200, wherein the carrier can be glass. Next, a calculation step 520 is performed to calculate a preset frequency value of the radio frequency tags 100, 200 according to the material of the carrier. After step 520, a step 530 of providing the radio frequency tags 100, 200 is performed. The components of the radio frequency tags 100 and 200 and the connection manners thereof can be referred to the first and second embodiments, and therefore will not be described again. Next, an adjustment step 540 is performed to move the conductors 132, 232 to a preset position by the slide rails 131, 231 to adjust the operating frequency of the radio frequency tags 100, 200 to a preset frequency value.

In summary, in the method for adjusting the radio frequency tag and the operating frequency thereof of the present invention, the slidable conductor structure is mainly used to adjust the operating frequency of the radio frequency tag. In addition, when the radio frequency tag of the present invention is carried on the carrier, since the guiding system is slidably disposed in the sliding rail, the effect of adjusting the operating frequency without the segment can be achieved according to the material or thickness of the carrier. In addition, after adjusting the position of the conductor, the conductor can be fixed through the adhesive layer to fix the operating frequency of the radio frequency tag. It can be seen that the radio frequency tag of the present invention and the method for adjusting the operating frequency thereof can effectively solve the shortcoming that the conventional technology cannot adjust the operating frequency of the radio frequency tag at any time according to the usage.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any of the technical fields in the art to which the present invention pertains is generally known. The scope of protection of the present invention is defined by the scope of the appended claims, and the scope of the invention is defined by the scope of the appended claims.

100‧‧‧RF tags

110‧‧‧Substrate

120‧‧‧Antenna unit

121‧‧‧Extension

130‧‧‧Slidable conductor structure

131‧‧‧rails

132‧‧‧Conductors

Claims (10)

A radio frequency tag includes: a substrate; an antenna unit disposed on the substrate; and a slidable conductor structure including: a slide rail disposed on the substrate; and a conductor, sliding On the slide rail, the conductor is not electrically connected to the antenna unit, and is slidable relative to the antenna unit to change the operating frequency of the radio frequency tag. The radio frequency tag of claim 1, wherein the antenna unit has two extensions, and the guiding system is disposed between the two extensions and slidable relative to the two extensions to utilize the conductor and the second A capacitive coupling effect between the extensions to change the operating frequency of the radio frequency tag. The radio frequency tag of claim 1, wherein the antenna unit has a bent portion defining a loop area, wherein the conductor is slidable relative to the bent portion to cover a portion of the loop The area changes the operating frequency of the radio frequency tag. The radio frequency tag of claim 1, wherein the conductor has a predetermined shape, and the predetermined shape is a geometric figure. The radio frequency tag of claim 1, wherein the conductor An adhesive layer is adhered to the substrate. A method for adjusting a radio frequency tag operating frequency includes the following steps: providing a radio frequency tag, the radio frequency tag comprising: a substrate; an antenna unit disposed on the substrate; and a slidable conductor structure comprising: a sliding rail disposed on the substrate; and a conductor slidingly disposed on the sliding rail, wherein the conductor is not electrically connected to the antenna unit; and performing an adjusting step to use the sliding rail to move the conductor to a preset position to adjust the operating frequency of the radio frequency tag to a preset frequency value. The method for adjusting the operating frequency of the radio frequency tag as described in claim 6 further includes: providing a carrier, wherein the carrier carries the radio frequency tag; and calculating the preset frequency value according to a material of the carrier. The method for adjusting the operating frequency of a radio frequency tag according to claim 6, wherein the antenna unit has two extensions, and the guiding system is disposed between the two extensions, the adjusting step is to extend the conductor relative to the two extensions unit To slide to utilize the capacitive coupling effect between the conductor and the second extension to change the operating frequency of the radio frequency tag. The method for adjusting a radio frequency tag operating frequency according to claim 6, wherein the antenna unit has a bent portion, and the bent portion defines a loop area, wherein the adjusting step is to make the conductor be opposite to the bent portion. Sliding to change the operating frequency of the radio frequency tag by covering the loop area of the portion. The method for adjusting a radio frequency tag operating frequency according to claim 6, wherein the conductor comprises at least one hollow portion, and the pattern of the hollow portion is a geometric figure.