JPH0727188Y2 - Information card - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A Field of Industrial Application The present invention relates to an information card, and is particularly suitable for application to an information card having an antenna for transmitting and receiving a response signal.

B Outline of the Invention The present invention further reduces the size of the information card by disposing the antenna in a V shape on the surface of the board and arranging the circuit parts on the other part of the board in the information card. You can

C Conventional Technology As an information card reading device for reading information on a conventional information card, as shown in FIG. 3, for example, the information reading device 1 sends a response request signal W1 having a microwave of 2.45 [GHz] as a carrier wave.
The response information signal W2 which is generated in the response request signal generating circuit 2 and is emitted from the transmitting antenna 3 to the information card 4 and returned from the information card 4 is processed by the receiving antenna 5 of the information reading apparatus 1 in response signal processing. By incorporating the information card 4 in the circuit 6, for example, it is possible to construct an information card reading system for checking an entry / exiter who possesses the information card 4 as an entry / exit certificate or a cargo attached with the information card 4 as a tag. ing.

As an information card 4 applicable to such an information card reading system, a dipole antenna 4B attached so as to form a part of a wiring pattern on a wiring board 4A, and an integrated circuit (IC) forming an information signal generating circuit. By connecting the information signal generation circuit 4C of the configuration and the power supply battery 4D by the wiring pattern 4E, by changing the impedance at the feeding point of the dipole antenna 4B according to the information signal generated in the information signal generation circuit 4C. It has been proposed that the reflected wave is returned as a response information signal W2 by changing the reflectance of a carrier wave emitted from the information reading device 1 as a response request signal W1 (Japanese Patent Application No. 63-6).
No. 292) See JP-A No. 01-182782.

The information signal generating circuit 4C has an electric circuit configuration as shown in FIG. 4, and converts the information data S1 previously stored in the information memory 11 composed of, for example, a PROM into the clock signal S2 of the clock oscillating circuit 12. Therefore, the address signal is read by the address signal S3 of the address counter 13 that performs the counting operation, and is supplied to the impedance variable circuit 14 formed of, for example, a field effect transistor.

The impedance variable circuit 14 includes a pair of feeding point terminals T1 and
A dipole antenna connected between T2 and thus connected to the feeding point terminals T1 and T2 by turning on or off the field effect transistor when the information data S1 becomes a logic "1" or a logic "0". The impedance at the feeding point of 4B is variably controlled, and thus the reflectance for the response request signal W1 incident on the dipole antenna 4B is variably controlled.

A power supply battery 4D is connected between the ground-side power feed point terminal T1 and the power supply terminal T3 of the information signal generation circuit 4C, which continuously and continuously performs variable impedance control at the power feed point of the dipole antenna 4B by the information data S1. It is designed to get you.

A unique identification code is assigned to each information card 4 in the information memory 11, so that the information reading device 1 can reliably read the information held by the information card 4.

D Problems to be solved by the invention Here, in the information card 4 having the configuration shown in FIG. 2, the antenna element 4BX is provided along the side portion 4F of the rectangular wiring board 4A.
And 4BY are arranged on a straight line to configure the dipole antenna 4B, so that the length of the side portion 4F needs to be larger than the length of the dipole antenna 4B.

The length of the dipole antenna 4B is determined according to the wavelength λ of the carrier wave that carries the response request signal W1 and the response information signal W2.

Therefore, for example, when a carrier wave of 2.45 [GHz] is used, the length of the side part 4F of the information card 4 is set to 5 to 5 by setting the length of the dipole antenna 4B to 5 to 6 [cm].
It should be 6 cm or more.

However, it is considered necessary for the information card 4 to be miniaturized as much as possible because the information card 4 is usually carried by a user or attached to an article as a tag.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide an information card in which the size of a wiring board is reduced and the usability is further improved.

E Means for Solving the Problems In order to solve such problems, in the present invention, a substantially rectangular substrate 21, an information signal generating means 4C arranged on the substrate 21 for generating an information signal, and A dipole antenna 22 composed of two antenna elements 22A and 22B, which are respectively connected to the information signal generating means 4C and are arranged in a V-shape on the substrate 21 so that their longitudinal directions are different from each other, and an information signal arranged on the substrate 21. A power supply means 4D for supplying power to the generation means 4C is provided.

Further, in the present invention, the two antenna elements 22A and 22B of the dipole antenna 22 are connected to the first side portion 21A of the substrate 21.
And the second side portion 21B adjacent to the first side portion 21A.

F action By disposing the two antenna elements 22A and 22B of the dipole antenna 22 in a V shape on the substrate 21 having a substantially rectangular shape so that the longitudinal directions thereof are different from each other, the information signal generating means 4C and the power source are provided on the substrate 21. The supply means 4D can be mounted with high density, and the outer shape of the information card 20 can be miniaturized. Furthermore, two antenna elements of the dipole antenna 22
By arranging 22A and 22B along the first side part 21A of the substrate 21 and the second side part 21B adjacent to the first side part 21A, respectively, the outer shape can be made smaller. Can be transformed.

G Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1 in which parts corresponding to those in FIG. 2 are designated by the same reference numerals, 20 denotes an information card as a whole, and a dipole antenna 22 is provided along a first side portion 21A of a rectangular wiring board 21. The first antenna element 22A constituting the second antenna element 22B constituting the dipole antenna 22 is arranged along the second side portion 21B at a right angle to the first antenna element 22A. Are arranged in the direction.

Further, the information signal generating circuit 4C includes the first and second antenna elements.
It is arranged at a position sandwiched by 22A and 22B, the power supply battery 4D is surrounded by the first and second antenna elements 22A and 22B, and is provided at a position offset from the center of the wiring board 21, Antenna elements 22A, 22B, information signal generation circuit 4C
And the power supply battery 4D is connected by a wiring pattern 4E.

In the above configuration, in the information card 20, the first and second antenna elements 22A and 22B of the dipole antenna 22 are arranged along the first side portion 21A and the second side portion 21B of the wiring board 21 along the V side.
The lengths of the first side portions 21A are arranged in the shape of a letter, so that the length of the first side portion 21A is equal to that of the first antenna element 22A and the information signal generating circuit 4C.
Is set to a length that can be placed.

The length of the second side portion 21B is set to a length at which the second antenna element 22B can be arranged.

Therefore, the wiring board 21 is a dipole antenna as in the past.
Compared with the case where 4B is arranged on a straight line, the lengths of the first and second side portions 21A and 21B can be shortened and downsized,
As a result, the circuit elements can be mounted in higher density.

When the information card 20 is subjected to bending stress and the wiring board 21 is bent, the bending stress is concentrated on the central portion of the wiring board 21, and the information signal generating circuit 4C of the IC circuit configuration is arranged on the wiring board.
If the offset is arranged from the central portion of 21, the bending stress can be prevented from concentrating on the information signal generating circuit 4C, thereby preventing the IC chip and the like from being damaged.

It has been clarified by experiments that the first and second antenna elements 22A and 22B of the dipole antenna 22 are arranged in a V shape and have directivity in the direction indicated by the arrow a in FIG.

Therefore, in the information card 20, the dipole antenna 22
Even when the information card 20 and the information reading device 1 are separated from each other by using the information reading device 1 (FIG. 3) with the direction having the directivity of (1) facing the information reading device 1 (FIG. 3). The information on the information card 20 can be reliably read.

According to the above configuration, the first and second antenna elements 22A and 22B forming the dipole antenna 22 on the wiring board 21 of the information card 20 are connected to the first and second side portions 21A and 2B.
By arranging in a V shape along 1B, the size of the wiring board 21 can be reduced, and the information card 20 can be further downsized accordingly.

Incidentally, in the above-mentioned embodiment, the antenna elements 22A and 22B
Has been described as being arranged along the first and second side portions 21A and 21B of the wiring board 4A, but the present invention is not limited to this, and in short, the antenna elements 22A and 22B are arranged in a V shape. By doing so, the same effect as the above case can be obtained.

Also, in the above embodiment, the antenna elements 22A and 22B
Although the case where the angle formed by is 90 ° has been described, the present invention is not limited to this, and the same effect as in the above case can be obtained by using another angle.

Further, in the above embodiment, the case where the rectangular wiring board 21 is used is described, but the present invention is not limited to this.
For example, even if a wiring board having various shapes such as a circular shape is used, the same effect as the above case can be obtained.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the information card is described, but the present invention is not limited to this, and the antenna such as a magnetic card having a combination of functions of the information card is arranged on the substrate. Therefore, it can be widely applied to other electronic devices.

H Effect of the Invention As described above, according to the present invention, the V-shaped antenna is arranged on the wiring board, and the circuit parts are arranged on the other portions of the wiring board, thereby reducing the size of the wiring board. Therefore, the information card can be downsized and the usability can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a wiring board of an information card according to an embodiment of the present invention, FIG. 2 is a schematic plan view showing a wiring board of a conventional information card, and FIG. FIG. 4 is a schematic block diagram showing the configuration of the system, and FIG. 4 is a schematic block diagram showing the electrical configuration of the information card. 4,20 …… Information card, 4A, 21 …… Wiring board, 4B, 22…
… Dipole antenna, 4C… Information signal generation circuit, 4D…
… Power supply batteries, 21A, 21B …… Sides, 22A, 22B …… Antenna elements.

Claims (2)

[Scope of utility model registration request] 1. A substrate having a substantially rectangular shape, information signal generating means arranged on the substrate for generating an information signal, and connected to the information signal generating means, respectively, so that the longitudinal directions on the substrate are different from each other. An information card comprising a dipole antenna composed of two antenna elements arranged in a V shape, and a power supply means arranged on the substrate and supplying power to the information signal generating means. 2. The two antenna elements of the dipole antenna are respectively arranged along a first side portion of the substrate and a second side portion adjacent to the first side portion. The information card according to claim 1, which is characterized in that the utility model registration claim.