JP2646983B2 - Wall antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall antenna for microwave satellite communication and the like which can be installed without damaging the view of a building.

[0002]

2. Description of the Related Art Conventionally, when a satellite communication antenna, for example, a satellite broadcasting receiving antenna is installed in a building, a diameter of 1 m is required.
Antennas having a fixed structure such as front and rear parabolic antennas and poles are installed on a rooftop or the like, and various facilities have come to cover the rooftop of the building with other facilities. In recent years, the landscape of a building has become more important, and an antenna integrated with the building has been demanded. However, the roof including the antenna has been neglected.

[0003]

It is conceivable in the prior art to cover a parabolic antenna installed on the roof with an object such as a radome as a measure for improving the scenery of a building. The structure has a drawback that it is not compatible with the roof structure of the building in terms of design. As an alternative, it is considered to install a parabolic antenna inside the glass window to solve the appearance of the building.However, in order to secure a propagation area for radio waves incident on the parabola from an oblique sky, a considerably large window is required. At the same time, the glass that secures the architectural strength needs to be quite thick, and as a result, the radio wave propagation loss due to the glass increases, and to compensate for this, the diameter of the antenna installed inside must be increased, There are drawbacks such as an increase in the floor area of a building used for installing an antenna, and the use of expensive tempered glass as a glass plate for securing building strength.

Accordingly, the present invention is intended to improve the drawbacks of the prior art and to realize a high-performance antenna which does not occupy the antenna in the external design and does not occupy a large floor area due to the antenna. is there.

[0005]

A wall antenna according to the present invention is obtained by dividing a satellite communication parabolic antenna or the like into small antennas. A plurality of concave type antennas are provided inside a material such as a fire-resistant building wall such as foam concrete. It is provided with a phase adjuster for inserting or fixing antennas having a direction adjustment structure in these holes, and for phase combining or separating the output or input of each antenna, and a combiner or separator. . If necessary, a low noise amplifier is added to the antenna output, and a power amplifier is added to the antenna input.

[0006]

FIG. 1 is a perspective view schematically showing one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a wall material such as foamed concrete, for example, and a cylindrical concave hole inside thereof. Two are hanging. Reference numeral 3 denotes, for example, a small parabolic antenna, which is inserted and fixed via a fixing bracket (not shown) having a direction adjusting function for each hole 2. FIG. 2 is a diagram for explaining the shape of the wall material of FIG. 1. As can be seen from FIG. 2, the holes 2 are arranged in a honeycomb shape inside the wall surface,
Moreover, as shown in the cross-sectional view (B), the hole 2 does not penetrate the wall material and leaves a portion having a thickness t. Due to the structure in which the holes 2 are dispersed in the wall surface, the architectural strength of the wall material can be maintained even if the thickness t is sufficiently reduced. In the case of foamed concrete, when the thickness t is 1 cm, the propagation loss for radio waves in the 12 GHz band is as small as about 1 dB, so that the required antenna gain can be secured without increasing the receiving area of the antenna much. .

FIG. 3 shows a circuit for synthesizing the outputs of a plurality of parabolic antennas 3 embedded in a wall material. The outputs of the parabolic antennas 3a, 3b,.
a, 4b,... are adjusted by the phase adjusters 5a,... so as to match the phases of the signal outputs of the antennas combined, and are combined by the phase synthesizers 6a,. The phase adjuster and the phase combiner have several stages according to the number of parabolic antennas to be combined. Note that the low-noise amplifiers 4a,
4b,... Are for compensating that the reception performance is deteriorated when the insertion loss of the phase adjuster or the phase synthesizer is large. If this insertion loss has no practical problem, the low noise amplifier is omitted. can do. In addition, when foamed concrete is used as the wall material 1, there is a possibility that moisture such as rain may penetrate into the wall material to increase the propagation loss. Sometimes.

According to the configuration shown in FIG.
Is protected from the outside environment by the wall material,
It does not require a waterproof structure required by ordinary antennas or a strong structure to withstand the wind pressure and the pressure caused by the snow, and it is not visible from the outside, so there is no need for painting or decoration to secure the design. In addition, since sufficient performance can be ensured with a structure that uses an inexpensive material and maintains the necessary minimum strength, the manufacturing cost can be extremely reduced.

In the embodiment shown in FIG. 1, foamed concrete is used as a wall material, but, for example, a ceramic material can be used. In addition, although the hole 2 has been described as having a cylindrical shape, the hole 2 may have a rectangular tube shape. Also, the arrangement interval of the holes 2 is
The material may be selected so as to maintain the strength of the wall material. Further, even if the parabolic antenna 3 is a planar antenna or the like, the same effect can be obtained.

In the above description, the example of the receiving antenna has been described. However, the transmitting antenna can be realized by the same concept. In the case of the transmitting antenna, the power amplifiers 7a, 7b,
, And phase adjusters 5a, 5b, ... and phase separators 8a, 8
.., etc.

A plurality of antennas arranged on the wall are divided into a group for reception and a group for transmission. The antennas of the reception group are connected as shown in FIG. 3, and the antennas of the transmission group are connected as shown in FIG. An antenna system for microwave communication that can be used for both transmission and reception can be configured as the entire wall surface.

Further, two groups of antennas having different frequency bands may be arranged and connected to a plurality of combining or separating circuits to simultaneously perform a plurality of communications having different frequency bands. As described above, according to the present invention, a very large undeveloped portion of a building wall, which has not been used so far, can be effectively used. Antenna sharing system, which was constructed by adding expensive components such as
By arranging many inexpensive small antennas individually, complicated functions can be realized with a simple configuration. In addition,
The arrangement of the antennas belonging to these groups does not need to be physically divided for each group, and the antennas belonging to each group may be arranged in a mixture.

[0013]

As described above, according to the present invention,
The antenna does not occupy a large building floor area without being conscious of the antenna in the external design, and is protected from the influence of the external environment such as rainfall, wind pressure, and snowfall, and a high-performance wall antenna can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of one embodiment of the present invention.

FIG. 2 is a structural diagram of a wall material according to an embodiment of the present invention;
(A) is a front view, (B) is a sectional view taken along line aa ′ in (A).

FIG. 3 is a combined circuit diagram of a wall antenna according to one embodiment of the present invention.

FIG. 4 is a separation circuit diagram of a wall antenna according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall material 2 Hole of wall material 3 Antenna 4a, 4b,-4n Low noise amplifier 5a, 5b,-5m Phase adjuster 6a, 6b,-6l Phase synthesizer 7a, 7b,-7n Power amplifier 8a, 8b,- 8l phase separator

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-266506 (JP, A) JP-A-63-18704 (JP, A) JP-A-2-152305 (JP, A) JP-A-2- 109405 (JP, A) JP-A-2-174403 (JP, A) JP-A-6-38322 (JP, U)

Claims (4)

(57) [Claims] 1. A wall antenna in which a plurality of holes are inserted inside a wall material, antennas having a direction adjusting structure are inserted and fixed in these holes, and the output or input of each antenna is phase-combined or phase-separated. 2. The wall antenna according to claim 1, further comprising a low noise amplifier between the antenna and the phase synthesizer. 3. The wall antenna according to claim 1, further comprising a power amplifier between the antenna and the phase separator. 4. Dividing each antenna into two groups,
The wall antenna according to claim 1, wherein a phase synthesizer is connected to an output of the first group of antennas, and a phase separator is connected to an input of the second group of antennas.