JP4616604B2 - Wireless transmission device - Google Patents

Description

The present invention relates to wireless transmission apparatus for transmitting radio waves through a window of a building.

In a conventional device that transmits radio waves through a building window, the antenna element is directly attached to the window glass. There was mechanical stress.
In addition, since ordinary glass has no means for shielding radio waves, unnecessary radio waves may jump into the room. (For example, see Patent Document 1)

Noto 3020658 publication

However, in conventional devices that transmit radio waves through windows in buildings, the antenna element is directly attached to the window glass, so the position of the antenna element changes with the opening and closing of the window, and the coaxial cable connected to the antenna element. There was a problem that mechanical stress was applied.
In addition, since there is no means for shielding radio waves in general glass, there is a problem that unnecessary radio waves may jump into the room.
For this reason, for example, when a television broadcast is received by the antenna of the conventional example, there is a problem that a reception state is changed or a ghost is generated.
As glass that shields radio waves, wire-lined glass and heat ray reflective glass using a film that shields radio waves such as metals and metal oxides are known. In the state, there was a problem that radio waves of the television broadcast could not be received indoors through the window glass.

Therefore, the present invention is provided with a window structure using glass having a function of blocking other radio waves through a specific radio wave, and when the window is closed, it is stable between the coupling portions provided on the outside and inside of the window. When the window is open, there is no function to block other radio waves through a specific radio wave, but radio waves can be transmitted between the joints provided on the outside and inside of the window . It is another object of the present invention to provide a wireless transmission device that does not hinder the opening and closing of windows and that does not give mechanical stress to the coaxial cable connected to the coupling portion.

In order to solve the above problems, the invention of claim 1,
As a window structure using glass with means to shield radio waves,
The glass is provided with a window part in which a part of the means for shielding the radio wave is removed in order to transmit a specific radio wave and block the other radio wave, and the window part opens and closes the window. A wireless transmission device using a window structure disposed at a position near the window frame surrounding the glass,
An antenna element is provided in the window portion of the glass, and a coupling portion is provided on each side facing the window portion of the glass at a position away from the glass when the window is closed, and the antenna element is interposed through the antenna element. Radio waves are transmitted between the coupling parts,
Furthermore, the resonance frequency of the antenna element is equal to the frequency of the radio wave transmitted between the coupling portions.

According to a second aspect of the present invention , in the wireless transmission device according to the first aspect , the means for shielding radio waves comprises a wire mesh or a metal wire, or a film for shielding radio waves such as metal or metal oxide.

According to a third aspect of the present invention , in the wireless transmission device according to the first aspect, the means for shielding radio waves is a film that shields radio waves, and is provided on both surfaces of the glass. It is provided in the said film | membrane of both surfaces of glass, respectively, It is characterized by the above-mentioned.

In a window structure wireless transmission device according to claim 1 is used, the glass, because it has a means for shielding a radio wave, in its glass, to block the radio waves otherwise transmitted through a specific radio wave, wherein and window removal of a part of means for shielding a radio wave is eclipsed set, the window portion is a end of a direction for opening and closing the window the vicinity of the window frame surrounding the said glass position Has been placed . For this reason, it has a window structure that captures only the necessary radio waves and prevents unwanted radio waves from entering the room .

In the wireless transmission device according to claim 1 , an antenna element is provided in the window portion of the glass using the window structure, and the both sides of the glass facing the glass portion when the window is closed, A coupling portion is provided at a position away from the glass, and radio waves are transmitted between the coupling portions via the antenna element . Further, the resonance frequency of the antenna element is between the coupling portions. It is equal to the frequency of the radio wave transmitted by
For this reason, when the window is closed, radio waves can be efficiently transmitted between the joints provided on the outside and inside of the window in a stable manner and through the antenna element of the window , and the window is opened. However, the function of blocking other radio waves through a specific radio wave is lost , and the antenna element of the window part is also disabled, but radio waves can be transmitted between the coupling parts provided on the outside and inside of the window, it prevents the opening and closing of the window rather name, it is also not provide mechanical stresses to the coaxial cable connected to the coupling portion.

According to the invention of claim 2, in claim 1 of the wireless transmission system, since the means for shielding the electromagnetic wave is a film that shields a radio wave, such as wire mesh or metal wire, or metal or metal oxide, efficiently It can provide a wireless transmission device that shields unnecessary radio waves, and also has the function of reflecting solar radiation energy .

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an example of a window structure according to the present invention, and FIGS. 2 to 6 and FIGS. 7 and 8 show examples of a radio transmission apparatus using the window structure . In particular, FIGS. 7 and 8 show examples of the wireless transmission apparatus according to the present invention. 9 and 10 show examples of other wireless transmission apparatuses that do not use the window structure of FIG.

FIG. 1 shows an example of a window structure according to the present invention.
The window 10 includes a support frame 17 fixed to a wall 15 and a glass 14 surrounded by a window frame 13. The surface of the glass 14 is covered with, for example, a metal or metal oxide film 11 that shields radio waves. The window portion 12 is a portion where a part of the film 11 that shields the radio wave is removed.
The window portion 12 blocks other radio waves through a specific radio wave depending on its shape and size. For example, when transmitting horizontally polarized waves, the window portion 12 in FIG. 1 is formed in a rectangular shape, and radio waves having a longer side length of a half wavelength or more can pass through the window portion 12, but lower than that. The frequency is reflected.

  FIG. 2 shows a wireless structure in which an antenna portion 16 is provided on one side of the glass 14 facing the window portion 12 of the glass 14 when the window 10 is closed using the window structure according to the present invention. An example of a transmission apparatus is shown. For example, a radio wave transmitted from an outdoor television radio wave transmission facility (not shown) passes through the window portion 12, is input to the antenna portion 16 installed indoors, and is transmitted from the connector 18 to a television or VTR via a coaxial cable. As shown in FIG. 2, when the window is closed, the size of the window 12 is adjusted to the frequency of the TV radio wave to be received, for example, from a lower-frequency civil band radio or amateur radio. The transmitted radio wave can be shielded.

  FIG. 3 shows a state in which the window is opened. In this case, since there is no window 12 in the direction of arrival of radio waves in the antenna unit 16 and there is no film 11 for shielding radio waves, there is a possibility that radio waves other than necessary radio waves may jump into the room. Can be received directly by the antenna unit 16. Moreover, since the antenna part 16 is attached to the wall 15 apart from the glass 14, it does not hinder the opening and closing of the window. 4 shows a cross-sectional view taken along line AA in FIG. 2, and FIG. 5 shows a cross-sectional view taken along line BB in FIG.

Next, using the window structure according to the present invention, an example in which the coupling portion 20 is provided at a position facing the window portion 12 of the glass 14 and away from the glass 14 when the window 10 is closed is shown in FIG. Shown in The coupling unit 20 has the same structure as the antenna unit 16.
For example, a coaxial cable that transmits a signal received by an outdoor antenna (not shown) installed at a good reception point is connected to the connector 18-2 of the outdoor coupling unit 20-2. The radio wave is radiated from the outdoor coupling unit 20-2 to the window unit 12, further received by the indoor coupling unit 20-1, and connected to a receiving device provided indoors.
This operation can also be used as a mobile phone or wireless LAN repeater because a signal can be transmitted from an indoor transmitter to an antenna installed outdoors.

7 and 8 show examples in which the antenna element 30 is provided in the window portion 12. In the case where the antenna element 30 is provided in the window portion 12, when the resonance frequency of the antenna element 30 is equal to the transmission frequency, the two coupling portions 20 can transmit more efficiently than the transmission through the window portion 12 alone.
The antenna element 30 used here can be used by attaching a metal foil processed into a necessary shape to a thin resin plate or by etching a printed board.

FIG. 9 shows an example where there is no film 11 that shields radio waves. FIG. 10 is a cross-sectional view taken along the line CC of FIG.
The film 11 that shields radio waves is formed by vapor-depositing metal or metal oxide on the glass surface, or by sticking a film vapor-deposited with metal or metal oxide on the glass surface. Moreover, you may use the laminated glass which pinched | interposed the film which vapor-deposited the metal, the metal oxide, etc. between two glass.
Moreover, you may use the glass with a net | network, or the glass with a wire which embedded the metal wire as a means to shield an electromagnetic wave.
A matching circuit, an amplifier circuit frequency conversion circuit, and the like may be provided inside the coupling unit 20 as necessary. Further, by adjusting the distance between the coupling unit 20 or the antenna unit 16 and the window unit 12, the respective matching states can be adjusted.
The window frame 13 and the support frame 17 are preferably made of a material having a low electrical resistance such as aluminum or iron. The material of the wall 15 is preferably a material such as reinforced concrete that is difficult to transmit radio waves.

Note that the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the structure of each part without departing from the spirit of the present invention, as exemplified below.
For example, the antenna element may be a dipole type, a loop type, or the like. Moreover, in the said Example, although the film | membrane 11 which shields an electromagnetic wave was provided in the single side | surface of the glass 14, you may provide it facing both surfaces of glass. In that case, the window part 12 is provided in the film | membrane 11 of both surfaces, respectively.
Further, the window portion 12 may be formed of a slit.

1 shows an example of an embodiment of a window structure according to the present invention. 1 shows an example of an embodiment of a wireless transmission device using a window structure according to the present invention. The window is opened. FIG. 3 is a sectional view taken along line AA in FIG. 2. The BB sectional view taken on the line of FIG. 3 is shown. The example which provided the coupling | bond part 20 using the window structure which concerns on this invention is shown. The example which provided the antenna element 30 in the window part 12 is shown. FIG. 8 is a partially enlarged view of FIG. 7. An example in which there is no film 11 that shields radio waves is shown. The CC sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Window, 11 ... Film which shields electromagnetic wave, 12 ... Window, 13 ... Window frame, 14 ... Glass, 15 ... Wall, 16 ... Antenna part, 17 ... Support frame, 18 ... Connector, 20 ... Coupling means, 30 ... Antenna element

Claims (3)

As a window structure using glass with means to shield radio waves ,
Wherein the glass, in order to block the radio waves otherwise transmitted through a specific radio wave, the window has been removed a portion of means for shielding the electromagnetic wave is provided, the window portion is a direction for opening and closing the windows A wireless transmission device using a window structure disposed at a position near the window frame surrounding the glass ,
An antenna element is provided in the window portion of the glass, and a coupling portion is provided on each side facing the window portion of the glass at a position away from the glass when the window is closed, and the antenna element is interposed through the antenna element. Radio waves are transmitted between the coupling parts,
Furthermore, the resonance frequency of the antenna element is equal to the frequency of the radio wave transmitted between the coupling parts. 2. The wireless transmission device according to claim 1, wherein the means for shielding radio waves is a wire mesh, a metal wire, or a film for shielding radio waves such as metal or metal oxide . The means for shielding radio waves is a film for shielding radio waves, and is provided on both surfaces of the glass, and the window portion is also provided on each of the films on both surfaces of the glass. The wireless transmission device according to claim 1 .

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