TWI741523B - Electronic tag - Google Patents

Abstract

An electronic tag is provided. The electronic tag includes a substrate, an integrated circuit, and a front antenna. 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, wherein the front antenna is asymmetry with respect to the central line.

Description

electronic label

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 good anti-counterfeiting effects, electronic tag sensing technology is widely used in electronic toll collection systems, and the performance of electronic tags directly affects the overall efficiency and reliability of the electronic toll system such as (signal). Among them, the characteristics of reading distance and main beam angle are also indicators for evaluating the performance of electronic tags. Therefore, how to effectively increase the reading distance and change the main beam angle is a topic to be studied.

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, and a front antenna. The substrate includes a front surface and a back surface on opposite sides. The front surface has a center line, and the center line is perpendicular to the long axis of the substrate. product The body circuit is arranged on the center line of the front surface. The front antenna is arranged on the front and coupled to the integrated circuit, and the front antenna is asymmetric with respect to the center line. In addition, the part on the center line where the front antenna is provided is smaller than the part where the front antenna is not provided.

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

In an embodiment of the present invention, the area of the front antenna relative to the two sides of the center line is different.

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

In an embodiment of the present invention, the front antenna is disposed on the front and coupled to the integrated circuit. The front antenna includes a first front antenna structure and a second front antenna structure. The first front antenna structure is disposed on one side of the center line, and the second front antenna structure is disposed on the other side of the center line relative to the first front antenna structure, and The first front antenna structure is coupled and asymmetrical.

In an embodiment of the present invention, the shape of the first front antenna structure and the second front antenna structure are different.

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

In an embodiment of the present invention, the materials of the first front antenna structure and the second front antenna 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 electronic tag further includes a metal layer disposed on the back surface.

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

310: The first front antenna structure

320: The second front antenna structure

400: Metal layer

900: Electronic label

1A and 1B are respectively a bottom view and a front 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 diagram showing the simulation results of the theoretical front reading distance of the first embodiment of the electronic tag of the present invention and the comparative example.

Fig. 6 is a diagram showing the simulation results of the theoretical front reading distance of the second embodiment of the electronic tag of the present invention and the comparative example.

FIG. 7 is a diagram showing the simulation results of the theoretical front reading distance of the third embodiment of the electronic tag of the present invention and the comparative example.

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 and FIG. 1B, the bottom view and the front view of the first embodiment of the present invention, the electronic tag 900 includes a substrate 100, an integrated circuit 200, and a front antenna 300. 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 It is 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 and 1B, the front antenna 300 is disposed on the front 110 and coupled to the integrated circuit 200, and the front antenna 300 is asymmetrical with respect to the center line 111. In addition, the portion on the center line 111 where the front antenna 300 is provided is smaller than the portion where the front antenna 300 is not provided. Wherein, the asymmetry generally refers to, for example, that the front antenna 300 has different shapes, different areas, and different materials on the two sides of the center line 111. In other words, it is possible to change the shape, adjust the area, use different materials, etc., to make the front antenna 300 different from the two sides of the center line 111. The material of the front antenna 300 is preferably selected from metals or alloys including copper, gold, silver, aluminum and the like.

Viewed from different angles, the front antenna 300 includes a first front antenna structure 310 and a second front antenna structure 320. The first front antenna structure 310 is disposed on one side of the center line 111, and the second front antenna structure 320 is disposed on the center line 111. Relative to the other side of the first front antenna structure 310, it is coupled to the first front antenna structure 310 and is asymmetrical. Based on the above, the term asymmetry includes, for example, the different shapes of the first front antenna structure 310 and the second front antenna structure 320, the different areas of the first front antenna structure 310 and the second front antenna structure 320, and the first front antenna structure 310 and the second front antenna structure 320. The material of the second front antenna structure 320 is different.

As shown in FIGS. 2A to 3C, in different embodiments, the electronic tag 900 may further include a metal layer 400 disposed on the back 120 for adjusting the main beam angle of the electronic tag 900. The material of the metal layer 400 is preferably selected from metals or alloys including copper, gold, silver, aluminum and the like. 2A, 2B, and 2C are a plan view, a front view, and a rear view of the second embodiment, respectively, and Figs. 3A, 3B, and 3C are respectively a plan view of the third embodiment. Figure, front view, back view. On the other hand, as shown in Fig. 4A and Fig. 4B, the top view and front view of the comparative example, where the comparative example is a commercialized Yuantong Electronic Collection Co., Ltd. product number RF122 electronic toll radio frequency tag 90, including the substrate 10, Integrated circuit 20, and front antenna 30.

The following uses ANSYS HFSS (U.S.) software to perform simulation tests at the 925MHz frequency 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 reading distances of the first embodiment, the second embodiment, and the third embodiment at the 925 MHz frequency point are all longer. Accordingly, the electronic tag of the present invention has better performance. Furthermore, the electronic tag of the present invention can increase the reading distance at a specific frequency point through the proper asymmetric structure design of the front antenna, thereby improving performance.

Although the foregoing description and drawings have disclosed the preferred embodiments of the present invention, it must be understood that various additions, many modifications and substitutions may be used in the preferred embodiments 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 familiar with the technical field of the present invention will appreciate that the present invention can be used in many forms, structures, arrangements, proportions, materials, elements, and component modifications. 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.

100 substrates 110 positive 111 centerline 200 integrated circuit 300 front antenna 310 first front antenna structure 320 second front antenna structure 900 electronic label

Claims (10)

An electronic tag comprising: 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; and an integrated circuit arranged at the center of the front surface And a front antenna, which is arranged on the front surface and is coupled to the integrated circuit, the front antenna is asymmetrical with respect to the center line; and, the part on the center line where the front antenna is arranged is smaller than the part where the front antenna is not arranged The part of the antenna. The electronic tag according to claim 1, wherein the shape of the structure on both sides of the front antenna with respect to the center line is different. The electronic tag according to claim 1, wherein the area of the front antenna is different with respect to both sides of the center line. The electronic tag according to claim 1, wherein the material of the front antenna is different from the two sides of the center line. An electronic tag comprising: 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; and an integrated circuit arranged at the center of the front surface Line; and a front antenna, which is disposed on the front surface and coupled to the integrated circuit, the front antenna includes: a first front antenna structure disposed on one side of the center line; and a second front antenna structure disposed On the other side of the center line opposite to the first front antenna structure, it is coupled to the first front antenna structure and is asymmetrical; In addition, the part on the center line where the front antenna is arranged is smaller than the part where the front antenna is not arranged. The electronic tag according to claim 5, wherein the shape of the first front antenna structure and the second front antenna structure are different. The electronic tag according to claim 5, wherein the area of the first front antenna structure is different from that of the second front antenna structure. The electronic tag according to claim 5, wherein the materials of the first front antenna structure and the second front antenna structure are different. The electronic tag according to claim 1 or 5, wherein the material of the substrate is Polyimide (PI). The electronic label according to claim 1 or 5, further comprising a metal layer disposed on the back surface.

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