TWI723800B - Electronic tag - Google Patents

Abstract

An electronic tag is provided. The electronic tag includes a substrate, an integrated circuit, a front antenna, and a metallic layer. The substrate includes a front face and a rear face disposed in opposite sides, wherein the front face includes a central line. The integrated circuit is disposed on the front face. The front antenna is disposed on the front face and coupled to the integrated circuit. The metallic layer is disposed on the rear face and is asymmetry with respect to the central line.

Description

Electronic tags

The invention relates to an electronic tag. More specifically, the present invention relates to a wireless frequency setting tag.

In order to reduce the overall cost of road tolling, provide acceptable reliability, increase data quality, and reduce traffic congestion, air pollution and energy consumption in toll areas, electronic toll collection systems are used on many highways.

Based on the good anti-counterfeiting effect, the electronic tag induction technology is widely used in electronic toll collection systems, and the efficiency of the electronic tag directly affects the overall efficiency and reliability of the electronic toll system such as (signal). Among them, because the antenna receiving end of the electronic toll lane RFID system has a fixed angle, the stable reading distance and the main beam angle of the electronic tag are also indicators for evaluating the performance of the electronic tag. Therefore, how to effectively change the angle of the main beam to match the angle of the antenna receiving end of the lane RFID system so that it has a stable reading distance is a topic to be studied.

Furthermore, for electronic tags attached to the front glass of large vehicles such as trucks, trucks, tourist buses, etc., since the front glass of these vehicles is close to vertical compared to the ground, if the main beam angle is towards the metal roof, To reduce the efficiency of the electronic tag, it is necessary to adjust the angle of the main beam so that it faces diagonally upward.

The main purpose of the present invention is to provide an electronic tag with better performance.

The electronic tag of the present invention includes a substrate, an integrated circuit, a front antenna, and a metal layer. The substrate includes a front side and a back side on opposite sides, and the front side has a centerline. The integrated circuit is arranged on the front. The front antenna is arranged on the front and coupled to the integrated circuit. The metal layer is arranged on the back, and the metal layer is asymmetric with respect to the center line.

In an embodiment of the present invention, the shape of the structure on both sides of the metal layer relative to the center line is different.

In an embodiment of the present invention, the area of the metal layer is different from the two sides of the center line.

In an embodiment of the present invention, the material of the metal layer is different from the two sides of the center line.

In an embodiment of the present invention, the metal layer includes a first metal layer structure and a second metal layer structure. The first metal layer structure is disposed on one side of the center line, and the second metal layer structure is disposed on the center line relative to the first metal layer structure. The other side of the metal layer structure is asymmetric with the first metal layer structure.

In an embodiment of the present invention, the first metal layer structure and the second metal layer structure have different shapes.

In an embodiment of the present invention, the area of the first metal layer structure is different from that of the second metal layer structure.

In an embodiment of the present invention, the materials of the first metal layer structure and the second metal layer structure are different.

In an embodiment of the present invention, the material of the substrate is Polyimide (PI).

In an embodiment of the present invention, the material of the metal layer is copper.

The electronic tag of the present invention is preferably a radio frequency identification tag (RFID-Tag) for use with vehicles. However, in different embodiments, the electronic tag can be used for electronic devices, books, boxes or other objects .

As shown in FIG. 1A, FIG. 1B, and FIG. 1C of the top view, front view and back view of the first embodiment of the present invention, the electronic tag 900 includes a substrate 100, an integrated circuit 200, a front antenna 300, and a metal layer 400. The substrate 100 includes a front surface 110 and a back surface 120 located on opposite sides, and the front surface 110 has a center line 111. Among them, the substrate 100 is preferably rectangular, and more preferably rectangular. The center line 111 is an artificially defined line located in the center of the front surface 110 and dividing the front surface 110 into two symmetrical areas. The material of the substrate 100 is preferably selected from those that include polyimide (PI) and the like that facilitate electrical coupling. The integrated circuit 200 is disposed on the front surface 110 and can be further located on the center line 111. More specifically, the integrated circuit 200 may be a wafer.

In the first embodiment shown in FIGS. 1A to 1C, the front antenna 300 is disposed on the front 110 and is coupled to the integrated circuit 200. The metal layer 400 is disposed on the back surface 120, and the metal layer 400 is asymmetric with respect to the center line 111. Wherein, the asymmetry generally refers to, for example, that the metal layer 400 has different shapes, different areas, and different materials on the two sides of the center line 111. In other words, methods such as changing the shape, adjusting the area, using different materials, etc., can make the metal layer 400 different from the two sides of the center line 111. The material of the metal layer 400 is preferably selected from metals or alloys including copper, gold, silver, aluminum and the like.

As shown in the first embodiment shown in FIGS. 1A to 1C, viewed from different angles, the metal layer 400 includes a first metal layer structure 410 and a second metal layer structure 420. The first metal layer structure 410 is disposed on the center line 111. On one side, the second metal layer structure 420 is disposed on the other side of the center line 111 relative to the first metal layer structure 410 and is asymmetrical to the first metal layer structure 410. Based on the above, the term asymmetry includes, for example, the different shapes of the first metal layer structure 410 and the second metal layer structure 420, the different areas of the first metal layer structure 410 and the second metal layer structure 420, and the first metal layer structure 410 and The material of the second metal layer structure 420 is different.

In different embodiments, the metal layer 400 can also be disposed only on one side of the center line 111. 2A, 2B, and 2C are respectively a plan view, a front view, and a rear view of the second embodiment, and Figs. 3A, 3B, and 3C are a plan view, a front view, and a rear view of the third embodiment, respectively. On the other hand, as shown in Figure 4A and Figure 4B, the top view and the front view of the comparative example, where the comparative example is a commercialized Yuantong Electronic Collection Co., Ltd. product number RF116 electronic toll radio frequency tag 90, including the substrate 10, The integrated circuit 20, and the front antenna 30.

Next, use ANSYS HFSS (United States) software to perform simulation tests at the frequency of 925MHz for the comparative example, the first embodiment, the second embodiment, and the third embodiment. As shown in FIGS. 5 to 7, compared with the comparative example, the main beam angles of the first, second, and third embodiments at the 925MHz frequency point are deflected, and the deflection angle is about 90°. Accordingly, the electronic tag of the present invention can adjust the angle of the main beam through the appropriate asymmetric structure design of the metal layer on the back, thereby improving the performance.

Although the foregoing description and drawings have disclosed the preferred embodiment of the present invention, it must be understood that various additions, many modifications and substitutions may be used in the preferred embodiment of the present invention without departing from the scope of the attached patent application. The spirit and scope of the principles of the present invention. Those skilled in the art to which the present invention belongs will be able to appreciate that the present invention can be used for many modifications of forms, structures, arrangements, proportions, materials, elements and components. Therefore, the embodiments disclosed herein should be considered to illustrate the present invention, rather than to limit the present invention. The scope of the present invention should be defined by the scope of the attached patent application, and cover its legal equivalents, and is not limited to the previous description.

10: substrate 20: Integrated circuit 30: Front antenna 90: Electronic toll radio frequency tag 100: substrate 110: positive 111: Centerline 120: reverse 200: Integrated circuit 300: Front antenna 400: Metal layer 410: first metal layer structure 420: second metal layer structure 900: Electronic label

1A, 1B, and 1C are respectively a top view, a front view, and a rear view of the first embodiment of the electronic tag of the present invention.

2A, 2B, and 2C are respectively a top view, a front view, and a rear view of the second embodiment of the electronic tag of the present invention.

3A, 3B, and 3C are respectively a top view, a front view, and a rear view of the third embodiment of the electronic tag of the present invention.

4A and 4B are a plan view and a front view of a comparative example, respectively.

Fig. 5 is a simulation test result diagram of the first embodiment of the electronic tag of the present invention and the comparative example.

Fig. 6 is a simulation test result diagram of the second embodiment of the electronic tag of the present invention and the comparative example.

Fig. 7 is a simulation test result diagram of the third embodiment of the electronic tag of the present invention and the comparative example.

(no)

100: substrate

110: positive

111: Centerline

200: Integrated circuit

300: Front antenna

900: Electronic label

Claims (10)

An electronic tag includes: a substrate, including a front surface and a back surface on opposite sides, the front surface having a center line perpendicular to the long axis of the substrate; an integrated circuit disposed on the front surface; and a front surface The antenna is arranged on the front surface and coupled with the integrated circuit; a metal layer is arranged on the back surface, and the metal layer is asymmetric with respect to the center line. The electronic tag according to claim 1, wherein the metal layer has different shapes with respect to the structures on both sides of the center line. The electronic tag according to claim 1, wherein the area of the metal layer is different with respect to both sides of the center line. The electronic label according to claim 1, wherein the metal layer has different materials relative to the two sides of the center line. An electronic tag includes: a substrate, including a front surface and a back surface on opposite sides, the front surface having a center line perpendicular to the long axis of the substrate; an integrated circuit disposed on the front surface; and a front surface The antenna is arranged on the front surface and coupled to the integrated circuit; a metal layer is arranged on the back surface, and the metal layer includes: a first metal layer structure arranged on one side of the center line; and a second metal layer The structure is arranged on the other side of the center line relative to the first metal layer structure, and is asymmetric with the first metal layer structure. The electronic tag according to claim 5, wherein the first metal layer structure and the second metal layer structure have different shapes. The electronic tag according to claim 5, wherein the area of the first metal layer structure is different from that of the second metal layer structure. The electronic tag according to claim 5, wherein the material of the first metal layer structure is different from that of the second metal layer structure. The electronic tag according to claim 1 or 5, wherein the material of the substrate is Polyimide (PI). The electronic tag according to claim 1 or 5, wherein the material of the metal layer is copper.

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