JPH0629215U - Antenna device - Google Patents

Abstract

(57) [Abstract] [Purpose] An antenna device for carrying out radio communication with a communication device carried by a user or mounted in a mobile body, and does not require a plurality of input / output amplifiers and has a simple structure. The purpose of the present invention is to provide an inexpensive device. [Structure] A single conducting wire is wound around a plurality of surfaces, and at least one surface of the conducting wire is arranged so as not to be perpendicular to the communication apparatus. No matter what angle the communication device mounted on the body approaches the antenna device, the communication device is not perpendicular to at least one surface of the antenna device having a plurality of surfaces, and therefore reliable communication is possible. it can.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an antenna device suitable for application to, for example, a transmitting / receiving antenna of a non-contact type automatic ticket gate device.

[0002]

[Prior art]

 An automatic ticket gate is used to determine whether or not a person can pass by making wireless communication with an IC card carried by a passerby. Both IC cards and ticket gates of this type have a built-in flat antenna in which conductor wires are wound in a loop to enable wireless communication. Here, no matter what angle the plane antenna of the IC card approaches the plane antenna of the ticket gate, it is necessary to ensure reliable communication. However, if the relative angle of both antennas is within ± 45 °, the communication sensitivity will be reduced to a small extent, but if the inclination is more than that, it will affect the communication distance and narrow the communication range. This will be described with reference to FIGS. 6 and 7. In this figure, 10 is a plane antenna in the IC card, and 20 is a plane antenna in the ticket gate. When the positional relationship between the plane antenna 20 of the ticket gate and the plane antenna 10 of the IC card is parallel to each other as shown in FIG. 6, a relatively wide communication range A1 is obtained. On the other hand, if they are perpendicular to each other, the communicable range A2 may be divided as shown in FIG. Therefore, by devising the shape of the plane antenna of the ticket gate, consideration is given to eliminate the influence of the tilt and prevent the incommunicable range from occurring. For example, there is a method of arranging a plurality of planar antennas on either or both of a ticket gate and an IC card so that they are not parallel to each other (Japanese Patent Application No. 2-256515). According to this method, even if the positional relationship of one pair of planar antennas is vertical, it is not vertical to the other planar antennas, and the communicable range is expanded. Alternatively, there is a method of arranging a plurality of planar antennas on one or both of the ticket gate and the IC card in a state in which some of them are superposed on each other (Japanese Patent Application No. 2-256516). According to this method, adjacent planar antennas complement each other's communicable range, and the communicable range is expanded.

[0003]

[Problems to be solved by the device]

 By the way, in the above-described conventional antenna device, since it is composed of a plurality of planar antennas, a plurality of input / output amplifiers are required, which causes a problem of cost increase. At the same time, by arranging a plurality of input / output amplifiers, there was a problem that they interfered with each other when the adjustment levels of the amplifiers were different and had an adverse effect.

The present invention has been made under such a background, and an object thereof is to provide an inexpensive antenna device having a simple configuration without requiring a plurality of input / output amplifiers.

[0005]

[Means for Solving the Problems]

 An antenna device according to the present invention is an antenna device that is carried by a user or is mounted on a mobile body and performs wireless communication with a communication device having an antenna. It is characterized in that it is wound around a surface and at least one surface is arranged so as not to be perpendicular to the antenna of the communication device.

[0006]

[Action]

 According to the above configuration, even if the communication device carried by the user or the communication device mounted on the mobile body is approached to the antenna device at any angle, at least one of the antenna devices having a plurality of surfaces is provided. Since it is not perpendicular to one surface, the range of communication is expanded.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of an antenna device according to a first embodiment of the present invention. In this figure, 1 is a substrate, which is bent at a right angle. A loop antenna 2 is constructed by winding one antenna in a loop shape across the vertical surface 1a and the horizontal surface 1b of the substrate 1. By disposing such an antenna device in the ticket gate, even if the planar antenna 3 in the IC card is vertical to the vertical surface 1a of the substrate 1 as shown in FIG. It will be parallel. That is, the communicable range A1 obtained by combining the communicable range A1 shown in FIG. 6 and the communicable range A2 shown in FIG. 7 is obtained. Therefore, no matter what angle the IC card is brought close to the ticket gate, there will be no place where communication is impossible.

Next, FIG. 3 shows an antenna device according to a second embodiment of the present invention. In this embodiment, the substrate 1 is composed of a vertical plane 1a, a horizontal plane 1b, and a horizontal plane 1c parallel to the horizontal plane 1b. Then, the loop antenna 2 is wound around the respective surfaces 1a, 1b, 1c. By arranging such an antenna device in the ticket gate, as shown in FIG. 4, the communicable range B is obtained by combining the communicable range A1 shown in FIG. 6 and the communicable range A2 shown in FIG. can get. Therefore, the antenna device according to the second embodiment can obtain the same effect as the antenna device according to the first embodiment. Further, according to the second embodiment, as shown in FIG. 3, the passage range for allowing the user to pass the IC card 4 is limited between the horizontal plane 1b and the horizontal plane 1c, so that the user can be surely secured. The IC card 4 is passed within the communicable range. Therefore, the extreme variation of the passing speed of the IC card 4 is reduced, and the communication can be made more reliable.

FIG. 5 shows an antenna device according to a third embodiment of the present invention. In this embodiment, the substrate 1 has a lower surface 1d and an upper surface 1e which are, for example, vertically undulating curved surfaces. Then, the loop antenna 2 is wound around each of the surfaces 1a, 1d, 1e. By arranging such an antenna device in the ticket gate, the same effects as those of the first and second embodiments can be obtained. Further, as in the second embodiment, since the passage range of the IC card 4 can be limited to the user, reliable communication can be performed.

As described above, the following effects can be obtained by the above embodiment. (1) It is possible to provide an inexpensive device with few input / output amplifiers. (2) By limiting the pass range of the IC card and making it clear to the user, the user will be able to pass the IC card within the communicable range, and communication can be performed reliably.

[0011]

[Effect of device]

 As described above, according to the present invention, an antenna device for carrying out wireless communication with a communication device having an antenna, which is a device carried by a user or mounted on a mobile body, is provided. Since the conducting wire is wound around a plurality of surfaces, and at least one surface is arranged so as not to be perpendicular to the antenna of the communication device, a simple configuration without requiring a plurality of input / output amplifiers is provided. The effect is that an inexpensive device can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of an antenna device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a communicable range according to the embodiment.

FIG. 3 is a perspective view showing a configuration of an antenna device according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a communicable range according to the embodiment.

FIG. 5 is a perspective view showing a configuration of an antenna device according to a third embodiment of the present invention.

FIG. 6 is a diagram illustrating a communicable range based on a positional relationship between planar antennas.

FIG. 7 is a diagram illustrating a communicable range based on a positional relationship between planar antennas.

[Explanation of symbols]

 1 substrate 2 loop antenna 3 planar antenna 4 IC card

Claims (1)

[Scope of utility model registration request] 1. An antenna device that is carried by a user or is mounted on a mobile body and wirelessly communicates with a communication device having an antenna, wherein one conductor is provided on a plurality of surfaces. The antenna device is characterized in that the antenna device is wound so that at least one surface thereof is not perpendicular to the antenna of the communication device.