JP4244166B2 - Floor materials for radio base stations - Google Patents

Description

  The present invention relates to floor materials such as floor panels and floor boards used as wireless base stations for, for example, local PHS (Personal Handyphone System) and wireless LAN (Local Area Network) systems.

In recent years, there have been remarkable spreads and developments of wireless communication using local PHS, data transmission systems using PIAFS (PHS Internet Access Forum Standard) terminals, wireless LAN systems, and the like.
These wireless communication systems are connected to private branch exchanges and LANs in order to transmit and receive radio waves to and from various wireless communication terminals (for example, PHS telephones, PIAFS terminals, notebook computers, PDAs (Personal Digital Assistants), etc.). The base station needs to be installed indoors.

Conventional base stations are generally installed on indoor ceilings, side walls, and the like. For example, in Patent Document 1 below, a base station that performs wireless communication with a terminal such as a personal computer having a communication function is provided on the ceiling surface. A wireless communication system to be installed is described.
Patent Document 2 describes a method for installing a radio base station on a premises where a radio base station is installed on a pedestal on a stand installed on a floor, or a radio base station is fixed to a partition plate.
Further, Patent Document 3 describes a portable local PHS base station including a solar battery panel and the like.

JP-A-8-223172 (Claim 1, FIG. 1, FIG. 5, etc.) JP 2000-32534 A (Claim 1, FIGS. 1 to 5, etc.) JP-A-10-336094 (Claim 1, FIG. 1, FIG. 4, FIG. 5 etc.)

As described in Patent Document 1, when a base station is installed on a ceiling surface, work at a high place is required at the time of installation or inspection and maintenance. There is a problem that it is bulky.
The base stations described in Patent Document 2 and Patent Document 3 have a structure that can be placed indoors or outdoors in any case, so that the place to be placed must be secured, which interferes with normal operations and traffic. There are problems such as.

  Therefore, the present invention intends to provide a floor base material for a wireless base station that is simple and inexpensive to solve the above-mentioned various problems by integrating a base station including an antenna with a floor panel, a floor board, or the like. It is.

In order to solve the above-described problem, the base material for a radio base station described in claim 1 performs radio communication between the base station main body and an external radio communication terminal via an antenna connected to the base station main body. A flooring provided with a base station, which is flush with a metal flooring body, a base station body installed on the back side of the flooring body, and a recess on the surface side of the flooring body. a planar antenna that is embedded as disposed across the front and back surfaces of the flooring body comprising a coaxial cable connecting the base station body and the planar antenna, the rear surface to form the antenna portion to the surface of the planar antenna An earth part is formed on the floor, and the earth part is connected to the floor material body and grounded .

The floor covering for a radio base station according to claim 2 is the floor covering for a radio base station according to claim 1, wherein the base station main body is in a hollow portion on the back side of the floor covering main body and in the center of the back surface. Is to be stored .

The floor covering for a radio base station according to claim 3 is the floor covering for a radio base station according to claim 1 or 2, wherein the two planar antennas are in two recesses on the surface side of the floor covering body. It is buried .

  According to a fourth aspect of the present invention, there is provided a wireless base station floor material according to the first, second or third aspect, wherein the floor material body is a floor panel body for a free access floor (double floor). It is characterized by being.

According to the present invention, since the base station comprising the base station main body and the planar antenna is integrated with the flooring material, there is no need to install the base station on the indoor ceiling or side wall as in the prior art, and its installation work and maintenance The risk and labor associated with the inspection work can be reduced. Moreover, since the part which protrudes indoors can be eliminated, there is no possibility of obstructing business and traffic.
The present invention can be applied to a product / product management system, an anti-theft system, etc., as well as a local PHS, a cordless telephone, a wireless LAN system, and the like. That is, the IC tag attached to a product or the like is considered as a kind of wireless communication terminal, and a transceiver that wirelessly communicates with the IC tag is regarded as a base station, so that it can be similarly applied to these systems.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, the floor material for a radio base station according to the present invention is applied to a floor panel for a free access floor, but the present invention is not limited to this kind of floor panel, and a normal floor panel, floor board, It can be applied to various floor materials such as floor boards.

First, FIG. 1 is a front view (top view) of the floor panel 10 of the present embodiment, FIG. 2 is a front view, and FIG. 3 is a back view.
In these figures, 11 is a panel body as a floor material body made of metal such as steel or aluminum, and is formed in a hollow shape by joining a top plate 11a and a back plate 11b as shown in FIG. Yes.
Two concave portions are formed on both sides of the central portion of the top plate 11a, and a substantially square planar antenna 12 is embedded in these concave portions so as to be flush with the top plate 11a.

The planar antenna 12 is formed by forming copper foil on both front and back surfaces of a dielectric substrate such as glass epoxy, and the surface (hatched surface in FIG. 1) has a frequency and a specific band of radio waves to be transmitted and received. An antenna portion having a predetermined pattern in consideration is formed, and a ground portion is formed on the back surface. The antenna unit and the ground unit will be described later with reference to FIG.
The antenna unit needs to have directivity for propagating radio waves upward (inside the room) and obtain a desired gain.

  Reference numeral 13 denotes a base station main body, which is fixed to the center of the back surface (back plate 11b) of the panel main body 11 by an appropriate means such as a bolt. Here, the base station main body 13 may be housed in a hollow portion inside the back plate 11b if possible.

As shown in FIG. 2, the base station body 13 and the planar antenna 12 are connected by a coaxial cable 14. Although not shown in FIG. 2, connectors may be attached to both ends of the coaxial cable 14 and connected to the base station main body 13 and the planar antenna 12, respectively.
The base panel main body 13 and the floor panel 10 provided with the planar antenna 12 constitute a radio base station for the local PHS.

FIG. 4 is an enlarged view of a part of FIG. 2, and the planar antenna 12 has an antenna portion 12a made of a predetermined pattern of copper foil on the front surface and a ground made of copper foil on the back surface. A portion 12b is provided. The ground portion 12b is directly connected to the top plate 11a of the panel main body 11. The panel main body 11 is grounded via a post 40 and the like which will be described later.
The panel body 11 may be made of an insulating material such as concrete or resin, and the ground portion 12b of the planar antenna 12 is grounded by an appropriate method as necessary.

As shown in FIG. 4, the base station main body 13 is equipped with a transmission / reception function, an interface, etc. necessary for voice communication by the PHS telephone 51 and data transmission by the PIAFS terminal 52 (note PC equipped with a PIAFS modem). Via a private branch exchange, a LAN, and a power source.
In FIG. 4, reference numeral 20 denotes a carpet subjected to antistatic processing. Needless to say, a vinyl tile or the like may be laid instead of the carpet 20.

  FIG. 5 shows a construction state of the floor panel according to this embodiment. In the in-house PHS, it is possible to communicate in an area with a radius of about 100 m by one base station. Therefore, the floor panel 10 of the present embodiment may be laid on only a small part of the indoor floor surface, and the others are illustrated. Thus, a normal floor panel 10 ′ having no base station may be used. In FIG. 5, 30 is a floor slab and 40 is a support.

As described above, according to this embodiment, the base station composed of the base station main body 13 and the planar antenna 12 is integrated with the panel main body 11 to constitute the floor panel 10 for the radio base station. The base station can be installed without any work. In addition, maintenance and inspection of the base station main body 13 and the planar antenna 12 can be performed by removing the carpet 20 and removing the floor panel 10, so that workability is very good.
Furthermore, by applying the present invention to a floor panel for a free access floor, processing and routing of the connection cable to the base station body 13 can be facilitated.

In the above embodiment, the shape and arrangement of the planar antenna 12 are of course not limited to the illustrated example.
Furthermore, in the embodiment, a space diversity system is assumed as an anti-multipath system, and two planar antennas 12 are installed. However, the present invention is not limited to the local PHS, and a case where no multipath is particularly considered or a time diversity system. In the case of adopting the frequency diversity method, one planar antenna 12 may be installed in principle.

It is a surface view of the floor panel which concerns on embodiment of this invention. It is a front view of the floor panel which concerns on embodiment of this invention. It is a reverse view of the floor panel which concerns on embodiment of this invention. It is explanatory drawing which expanded and cut and showed a part of FIG. It is explanatory drawing which shows the construction state of the floor panel which concerns on embodiment of this invention.

Explanation of symbols

10, 10 ': Floor panel 11: Panel main body 11a: Top plate 11b: Back plate 12: Planar antenna 12a: Antenna portion 12b: Earth portion 13: Base station main body 13a: Cable 14: Coaxial cable 20: Carpet 30: Floor slab 40: support 51: PHS phone 52: PIAFS terminal (notebook computer)

Claims (4)

A flooring provided with a base station that performs wireless communication with an external wireless communication terminal via an antenna connected to the base station body and the base station body,
A metal flooring body,
A base station body installed on the back side of the floor material body,
A planar antenna embedded so as to be flush with the concave portion on the surface side of the floor material body;
A coaxial cable that is arranged across the front and back surfaces of the floor material body and connects the base station body and the planar antenna,
Equipped with a,
A base material for a radio base station , wherein an antenna portion is formed on the surface of a planar antenna and an earth portion is formed on the back surface, and the ground portion is connected to the floor material body and grounded . In the floor covering for a radio base station according to claim 1,
The base station body is housed in a hollow part on the back side of the floor material body and is stored in the center of the back surface . In the floor covering for a radio base station according to claim 1 or 2,
A flooring material for a radio base station , wherein the two planar antennas are embedded in two concave portions on the surface side of the flooring material body . In the flooring material for a radio base station according to claim 1, 2, or 3,
A floor material for a radio base station, wherein the floor material body is a floor panel body for a free access floor.

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