JPH07106834A - Planar antenna system for reception - Google Patents

Abstract

PURPOSE:To preclude the possibility of damaging external appearance of a building or causing a damage to the antenna system or radio wave interference due to external factors such as wind and rain. CONSTITUTION:The system is provided with a rectangular antenna element 1, midpoints of a couple of sides opposite to each other in the antenna element 1 are used for a couple of feeding points 4a, 4b, respectively, and the feeding points 4a, 4b are connected to a receiver via a feeding conductor. The antenna system main body 29 having the antenna element 1 and the feeding conductor is provided to an inner side of an exterior building material of a building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving planar antenna device.

[0002]

2. Description of the Related Art Currently, Yagi-Uda antenna is widely used as a TV receiving antenna device, but in some heavy snow areas, the receiving antenna device is damaged and deteriorates in performance due to snowfall, resulting in reception failure. . Therefore, in order to realize an antenna device that is less likely to be damaged by snow, a planar antenna device that can be installed on a roof or under an eaves has been proposed. This antenna device is used by amateur radio operators and the like as having the same performance as the widely used Yagi-Uda antenna.

As shown in FIG. 25, the above planar antenna device is provided with a plurality of rectangular antenna elements 51 arranged side by side on the same plane. Are a pair of feeding points 52a and 52b, respectively. Corresponding feeding points 52 of adjacent antenna elements 51
a and 52b are connected to each other by a pair of first feeding conductors 53a and 53b, respectively. Then, the middle portions of the adjacent first feeding conductors 53a and 53b are connected to each other by the pair of second feeding conductors 55a and 55b, and the middle portions of the pair of second feeding conductors 55a and 55b are the pair of third feeding. Conductor 56
a and 56b are connected to the receiver side, respectively.

[0004]

However, in the conventional planar antenna device, the antenna device main body is installed on the roof or under the eaves of a building in an externally exposed state. There is a possibility that the appearance of the building may be damaged. Further, there is a great possibility that the planar antenna device may be damaged or may cause radio interference due to external factors such as wind and rain.

In view of the above-mentioned problems, the present invention is intended to prevent the appearance of a building from being damaged, and damage or radio interference caused by external factors such as wind and rain.

[0006]

The technical means of the present invention for solving this technical problem is provided with a rectangular antenna element 1, and a pair of opposing side portions of the antenna element 1 has a middle portion. There are a pair of feeding points 4a and 4b, respectively.
In a planar antenna device for reception in which a and 4b are connected to a receiver side via a feeding conductor, an antenna device body 29 having the antenna element 1 and the feeding conductor is an inner surface side of an exterior building material of a building 30. It is located at the point.

[0007]

Since the antenna device main body 29 is not exposed to the outside, the planar antenna device eliminates the possibility of damaging the appearance of a building such as a house. Antenna device body 2
Since 9 is protected by the exterior building material, there is no fear of damaging the planar antenna device or causing radio interference due to external factors such as wind and rain.

[0008]

The present invention will be described below with reference to the illustrated embodiments. In FIG. 2, reference numeral 1 denotes a rectangular antenna element, which has a pair of long side portions 2a and 2b and a pair of short side portions 3a and 3b. Four antenna elements 1 are provided on the same plane,
The pair of long side portions 2a and 2b are sequentially arranged in parallel and the short side portion 3
They are arranged side by side in the a and 3b directions with a predetermined interval. The midpoints of the long sides 2a and 2b of each antenna element 1 which face each other are respectively defined as a pair of feeding points 4a and 4b. If the wavelength of the received radio wave is λ, for example, a pair of long side portions 2
The lengths of a and 2b are 0.50λ and the pair of short side portions 3a and 3b.
Is set to 0.27λ.

Reference numerals 6a and 6b denote a pair of first feeding conductors, which connect the corresponding feeding points 4a and 4b of the adjacent antenna elements 1 to each other, thereby forming an antenna unit 7 formed by combining the adjacent antenna elements 1 with each other. Two are formed.
Each of the first feeding conductors 6a and 6b has feeding bases 8a and 8b protruding inward from the feeding points 4a and 4b and U-shaped feeding bodies 9a and 9b.

Reference numerals 10a, 10b, 11a and 11b denote a pair of second feeding conductors provided in two sets, and connect the corresponding intermediate portions of the first feeding conductors 6a and 6b of the adjacent antenna units 7, respectively. . The connecting position of the pair of second feeding conductors 10a, 10b to the first feeding conductors 6a, 6b is the central portion of the first feeding conductors 6a, 6b. The connection position of the other pair of the second feeding conductors 11a, 11b to the first feeding conductors 6a, 6b is the first feeding conductor 6a,
6b are displaced in the same direction from the center of 6b by a dimension δA.

Reference numerals 13a, 13b, 14a and 14b denote a pair of third feeding conductors provided in two sets, and the second feeding conductor 10a,
10b or the middle portions of the second power supply conductors 11a and 11b are connected to the receiver side, respectively. A pair of third feeding conductors 1
One end of 3a, 13b is the second power supply conductor 11a, 11b.
Is connected to the middle part and the other end is a pair of power feeding parts 16a and 16b for connecting to the receiver side. One end of the pair of third feeding conductors 14a and 14b is the second feeding conductor 1
2a and 12b are connected to the middle part, and the other end is a pair of power supply parts 17a and 17b for connecting to the receiver side.

One pair of the third feed conductors 13
The connection position of a, 13b to the second power supply conductors 10a, 10b is the central portion of the second power supply conductors 10a, 10b. The connection position of the other pair of the third power feeding conductors 14a and 14b to the second power feeding conductors 11a and 11b is the second power feeding conductor 11
They are displaced from the central portions of a and 11b by the dimension δB in the same direction.

As described above, the connecting position of the pair of second power feeding conductors 10a, 10b to the first power feeding conductors 6a, 6b is the central portion of the first power feeding conductors 6a, 6b, and the one pair is connected. The connection position of the pair of third feeding conductors 13a, 13b to the second feeding conductors 10a, 10b is
Since they are at the central portions of a and 10b, the lengths of the feeding conductors from the feeding points 4a and 4b of each antenna element 1 to the feeding portions 16a and 16b are the same.

The dimension δB is set to be twice as long as the dimension δA. Therefore, the feeding point 4 of each antenna element 1
The lengths of the power feeding conductors from a, 4b to the power feeding portions 17a, 17b are sequentially different by a dimension δB. That is, feeding point 4
From the antenna elements 1 on the left side to L1, L2, L3, L, the lengths of the feeding conductors from a, 4b to the feeding portions 17a, 16b are
4, L1 = L + 3 × δB L2 = L + 2 × δB L3 = L + δB L4 = L.

In the example shown in FIG. 2, the first feeding conductor 6
The lengths of a and 6b in the vertical direction are sequentially different, but this is merely shown so that the connection relationship of the power feeding conductors can be easily understood. Actually, the lengths of the first power feeding conductors 6a and 6b in the vertical direction are shown. Both are the same, and therefore the first feeding conductor 6
The second power supply conductor sides of a and 6b are in a state of being overlapped with each other. Similarly, the second power supply conductors 10a, 10b, 11
Although the vertical lengths of a and 11b are also sequentially different, in reality, the respective second power supply conductors 10a, 10b, 11a and 11b have the same vertical length, and therefore, the respective second power supply conductors 10a. , 10b, 11a, and 11b, the third power supply conductor side is in a state where they are overlapped with each other.

The feeding point 4a of each antenna element 1 is
Since the lengths of the power feeding conductors from 4b to the power feeding portions 16a, 16b are the same, the antenna element 1 is provided through the pair of third power feeding conductors 13a, 13b (power feeding portions 16a, 16b). Is connected to the receiver side, the beam directivity angle of the antenna device becomes vertical (direction with an angle of 0 °) as shown in FIG. In addition, the lengths of the feeding conductors from the feeding points 4a and 4b of each antenna element 1 to the feeding portions 17a and 17b are sequentially different by the dimension δB, so that the other pair of the third feeding conductors 14a is formed. , 14
When the antenna element 1 is connected to the receiver side via b (feeding parts 17a and 17b), the antenna elements 1 are arranged from the vertical direction (direction of angle 0 °) as shown in FIG. The angle δ (= 30 °) can be swung in the direction.

The relationship between the dimension δB and the angle δ is as follows. δB = Dsin (δ) where D is the width of the positional deviation between the adjacent antenna elements 1. The antenna element 1, the pair of first feeding conductors 6a, 6
b, a pair of second feeding conductors 10a, 10b, 11a, 11
b and a pair of third feeding conductors 13a, 13b, 14a, 1
4b is applied to a plurality of sheet materials, and the plurality of sheet materials are laminated to form an antenna element 1, a pair of first feeding conductors 6a and 6b, a pair of second feeding conductors 10a and 10b,
11a, 11b and a pair of third feeding conductors 13a, 13
An antenna device body 29 having b, 14a and 14b is formed.

That is, as shown in FIG. 3, the antenna element 1 and the feeding bases 8a and 8b of the first feeding conductors 6a and 6b are provided.
Is applied to the surface of the sheet material 18 by applying a conductive paint or attaching a conductive tape, and the power feeding body 9a of the first power feeding conductor 6a is electrically conductive on the surface of the sheet material 19 as shown in FIG. Applied by applying a conductive paint or attaching a conductive tape, and the second power feeding conductor 10a and the third power feeding conductor 13a are applied to the surface of the sheet material 20 with a conductive coating or a conductive tape as shown in FIG. And the power supply main body 9b of the first power supply conductor 6b as shown in FIG.
Is applied to the surface of the sheet material 21 by applying a conductive paint or attaching a conductive tape, and the second power feeding conductor 10b and the third power feeding conductor 13b are applied to the surface of the sheet material 21 as shown in FIG. , A conductive paint is applied or a conductive tape is attached, and the second power feeding conductor 11a and the third power feeding conductor 14a are applied to the surface of the sheet material 23 by applying the conductive coating or conducting as shown in FIG. 9 is applied by applying a conductive tape, and as shown in FIG. 9, the second power feeding conductor 11b and the third power feeding conductor 14b are applied on the surface of the sheet material 24 by applying a conductive paint or pasting a conductive tape. ing. Each sheet material 18, 19, 20, 21, 22,
23 and 24 are made of a transparent, semi-transparent or opaque acrylic resin or the like, and are sequentially laminated as shown in FIG. 10 to form an antenna device body 29. The thickness of the antenna device body 29 is about 1 to 3 mm.

The plurality of sheet materials 18, 19, 20, 2
The antenna element 1 between 1, 22, 23 and 24, the pair of first feeding conductors 6a and 6b, the pair of second feeding conductors 10a,
10b, 11a, 11b and a pair of third feeding conductors 13
As shown in FIG. 11, a, 13b, 14a, 14b is electrically connected by a plurality of sheet materials 17, 18, 19, 20, 2.
It is made up of a plurality of conductive pins 25 which are inserted into the connector 1.

That is, the plurality of sheet materials 18, 19, 2
0, 21, 22, 23, 24, each sheet material 18, 1
Through holes 26 provided in 9, 20, 21, 22, 23, 24
The cylindrical conductive pin 25 is inserted through the sheet material of the conductive pin 25, and the sheet material 18, 19, 20, 21, 21, 2, 2 of the conductive pin 25 is inserted.
Both end portions 27, 28 projecting outward from 3, 24 are saw-toothed in the circumferential direction, and the both end portions 27, 28 of the sheet materials 18, 19, 20, 21, 22, 23, 24 are formed. The plurality of sheet materials 18, 19, 20, 21, 21, 23, 2 are folded back to the outer peripheral side so as to bite into the edge of the through hole 26.
4 is crimped, and both ends 27, 2 of the conductive pin 25 are
8 multiple sheet materials 18, 19, 20, 21, 22, 22
Antenna element 1 between 3 and 24, pair of first feeding conductors 6
a, 6b, a pair of second feeding conductors 10a, 10b, 11
a, 11b and a pair of third feeding conductors 13a, 13b, 1
4a and 14b are electrically connected.

Specifically, in this embodiment, the conductive pin 2 is used.
Eighteen pieces 5 are provided, and the conductive pins 25 are provided at four positions, that is, the tip of the feeding base 8a of the sheet material 18 and the tip of the feeding body 9a of the sheet material 19, and the tip of the feeding base 8b of the sheet material 18 and the sheet material. 21 at four points with the tip of the power feeding body 9b, two points at the midpoint of the power feeding body 9a of the first power feeding conductor 6a of the sheet material 19 and the tip of the second power feeding conductor 10a of the sheet material 20, the first power feeding conductor 6a of the sheet material 19. Of the power feeding main body 9a and the tip of the second power feeding conductor 11a of the sheet material 23, the midway portion of the power feeding body 9b of the first power feeding conductor 6b of the sheet material 21 and the tip of the second power feeding conductor 10b of the sheet material 22. Two locations, that is, the midway portion of the power feeding body 9b of the first power feeding conductor 6b of the sheet material 21 and the tip of the second power feeding conductor 11b of the sheet material 24 are connected to each other.

The antenna device main body 29 having the antenna element 1 and the feeding conductor has a structure 32 as shown in FIG.
It is provided on the inner surface side of the outer wall plate 33 which is the exterior building material. That is, in FIG. 1, 31 is an outer wall of a building 32 such as a house, and an outer wall plate 33 on the outer side and an inner plate 34 made of plywood on the inner side.
And a waterproof sheet 3 between the outer wall plate 33 and the inner plate 34.
5 are provided. The antenna device body 29 is provided between the outer wall plate 33 and the waterproof sheet 35. The outer wall plate 33 is made of a material that easily transmits radio waves. Reference numeral 36 is a furring strip arranged in the vertical direction.

According to the configuration of the above embodiment, when the antenna element 1 is connected to the receiver side via the pair of the third feeding conductors 13a and 13b, the beam directivity angle of the antenna is vertical to the antenna device. When the antenna element 1 is connected to the receiver side via the other pair of the third feeding conductors 14a and 14b facing the direction, the beam directivity angle of the antenna device is changed from the vertical direction to the direction in which the antenna elements 1 are arranged. It swings by δ. Therefore, the antenna device body 29 is attached to the outer wall plate 33.
When installing on the inner surface side of, the third feeding conductors 13a, 13b, 14a, 14b connected to the receiver side are selected, and the planar antenna device is installed upside down so as to be left-right reversed, By installing the antenna device in reverse, the beam directivity angle of the antenna device can be changed, whereby the beam directivity angle of the antenna device can be made closer to the transmitting station side with finer accuracy.

Then, the planar antenna device main body 29 is actually used.
Is installed on the inner surface side of the outer wall plate 33, the third feeding conductors 13a and 13b or the third feeding conductors 14a and 14b connected to the receiver side are selectively selected and the selected feeding portion 16a is selected. , 16b or only one of the power supply units 17a and 17b is connected to the receiver. The other power supply unit 17 not selected
It is necessary to disconnect the second and third power feeding conductors a and 17b or the power feeding portions 16a and 16b from the first power feeding conductors 6a and 6b so that they do not adversely affect reception. For example, when connecting the power feeding parts 16a and 16b to the receiver, a conductive pin that connects the midway part of the power feeding body 9a of the first power feeding conductor 6a of the sheet material 19 and the tip of the second power feeding conductor 11a of the sheet material 23. 25 and the conductive pin 25 connecting the midway portion of the power feeding main body 9b of the first power feeding conductor 6b of the sheet material 21 and the tip of the second power feeding conductor 11b of the sheet material 24 are extracted from the planar antenna device, Feeding conductor 6
a, 6b to second feeding conductor 11a and second feeding conductor 11
It suffices to cut b. Further, when connecting the power feeding portions 17a and 17b to the receiver, the conductive pin 25 connecting the midway portion of the power feeding body 9a of the first power feeding conductor 6a of the sheet material 19 and the tip of the second power feeding conductor 10a of the sheet material 20. And sheet material 2
The conductive pin 25 that connects the midway portion of the power feeding main body 9b of the first power feeding conductor 6b and the tip of the second power feeding conductor 10b of the sheet material 22 is pulled out from the planar antenna device, and the first power feeding conductors 6a and 6b. Therefore, the second feeding conductor 10a and the second feeding conductor 10b may be cut.

The method of cutting the second and third power feeding conductors on the non-selected side from the first power feeding conductors 6a and 6b is to cut the conductive pin 25 with a cutter or to provide it in advance. The switch may be used to disconnect. FIG. 13 shows another embodiment, which is an antenna device main body 29 having the antenna element 1 and a feeding conductor.
Is provided on the inner surface side of the outer wall plate 33, which is the exterior building material of the building 32, between the waterproof sheet 35 and the inner plate 34,
Further, inside the inner plate 34, a reflector 37 that reflects radio waves from the transmitting station toward the antenna device body 29 is provided. The reflector 37 is composed of a metal net or aluminum foil. The other points are the same as those of the above-described embodiment.

14 to 21 show another embodiment. As shown in FIG. 15, eight antenna elements 1 are provided on the same plane, and four of them are provided as a pair of long side portions 2a,
2b are arranged in parallel in parallel, and are arranged side by side in the lateral direction so as to have a predetermined distance in the direction of the short side portions 3a, 3b, and two antenna elements 1 each have a pair of short side portions 3a, 3b sequentially parallel. And are arranged side by side in the vertical direction so as to be spaced apart in the direction of the long sides 2a and 2b. Antenna element 1
Feeding points 4a, 4b as a feeding conductor for connecting to the receiver side, a pair of first feeding conductors 6a, 6b, a pair of second feeding conductors 10a, 10b, a pair of third feeding conductors 13a, 13
b and a pair of fourth feeding conductors 15a and 15b are provided.

The pair of first feeding conductors 6a and 6b respectively connect the feeding points 4a and 4b corresponding to each other of the antenna elements 1 adjacent in the lateral direction. A pair of second feeding conductors 10a, 1
0b connects the first feeding conductors 6a and 6b adjacent to each other in the horizontal direction to each other, thereby forming an antenna unit 12 formed by combining four antenna elements 1 arranged in the horizontal direction in the vertical direction. Individually formed.

The pair of third feeding conductors 13a and 13b are connected to the middle portions of the corresponding second feeding conductors 10a and 10b of the antenna units 12 adjacent to each other in the vertical direction. The pair of fourth feeding conductors 15a and 15b connect the middle portions of the third feeding conductors 13a and 13b to the receiver side, respectively. One end of the pair of fourth power supply conductors 15a, 15b is connected to the middle part of the third power supply conductors 13a, 13b, and the other end of the pair of fourth power supply conductors 15a, 15b is connected to the receiver side.
It is assumed to be b.

In the illustrated example of FIG. 15, the lengths of the first feeding conductors 6a and 6b in the vertical direction are slightly different, but this is merely shown so that the connection relationship of the feeding conductors can be easily understood. Actually, the lengths of the first feeding conductors 6a and 6b in the vertical direction are the same, and therefore, the first feeding conductor 6 is
The second power supply conductor sides of a and 6b are in a state of being overlapped with each other. Similarly, the lengths of the second power supply conductors 10a and 10b in the vertical direction are also the same.

As shown in FIG. 16, each of the antenna elements 1
And the feeding bases 8a, 8b of the respective first feeding conductors 6a, 6b
Is applied to the surface of the sheet material 18 by applying a conductive paint or pasting a conductive tape, and as shown in FIG. 17, the power feeding body 9a of the first power feeding conductor 6a and the second power feeding conductor 10 are provided.
a, the third power feeding conductor 13a and the fourth power feeding conductor 15a are applied to the surface of the sheet material 19 by applying a conductive paint or pasting a conductive tape, and as shown in FIG. The power feeding body 9b, the second power feeding conductor 10b, the third power feeding conductor 13b, and the fourth power feeding conductor 15b are provided on the surface of the sheet material 20 by applying a conductive paint or pasting a conductive tape. Similar to the above embodiment, the sheet materials 18, 19 and 20 are sequentially laminated as shown in FIG. 19 to form a planar antenna device body 29, and the antenna element between the plurality of sheet materials 18, 19 and 20 is formed. 1, a pair of first feeding conductors 6a and 6b, a pair of second feeding conductors 10
a, 10b, the pair of third feeding conductors 13a, 13b, and the pair of fourth feeding conductors 15a, 15b are electrically connected as shown in FIG.
As shown by 0, it is made of a plurality of conductive pins 25.

As shown in FIG. 14, the planar antenna device main body 29 having the antenna element 1 and the feeding conductor is provided on the inner surface side of a roof material 41 which is an exterior building material of a building 32 such as a house. That is, in FIG. 14, 39 is a roof of a building 32 such as a house, which has a slope of about 45 °,
Base plate 40 and many roofing materials 4 arranged on the base plate 40
1 and a waterproof sheet 42 is provided between the base plate 40 and the roof material 41. Roof material 41 and tarpaulin 42
The antenna device body 29 is provided between the roof and the roof member 41, and the roof member 41 is made of a material that easily transmits radio waves. Further, inside the field board 40, a reflection plate 37 that reflects radio waves from the transmitting station toward the antenna device body 29 is provided.

The planar antenna device main body 29 includes the roof 3
The antenna unit 12 on one side (upper side of FIG. 15) is located below the slope with respect to 9 and the other (lower side of FIG. 15) antenna unit 12 is located on the upper side of the slope. It is arranged along a slope gradient of 39.
Then, the length of the feeding conductor from the feeding points 4a and 4b of each antenna element 1 of one antenna unit 12 to the feeding portions 16a and 16b and the length of the other antenna so that the beam directivity angle of the antenna device is oriented in the horizontal direction. From the feeding points 4a and 4b of each antenna element 1 of the unit 12 to the feeding sections 16a and 1
The length of the feed conductor reaching 6b is different.

That is ,. As shown in FIG. 15, the connection position of the pair of second power feeding conductors 10a and 10b to the first power feeding conductors 6a and 6b is the central portion of the first power feeding conductors 6a and 6b, and the pair of third power feeding conductors is The connection position of 13a, 13b to the second power supply conductors 10a, 10b is the second power supply conductor 10
Although it is set to the central portion of a and 10b, the connection positions of the pair of fourth feeding conductors 14a and 14b to the second feeding conductors 11a and 11b are shifted from the central portions of the second feeding conductors 11a and 11b, respectively. And a pair of third feeding conductors 13a, 1
The length from one antenna unit 12 side of 3b to the fourth feeding conductors 15a and 15b is L1, and the other antenna unit 1 of the pair of third feeding conductors 13a and 13b.
The length from the second side to the fourth feeding conductors 15a and 15b is L2
It is said that. Therefore, the length of the feeding conductor from the feeding points 4a and 4b of each antenna element 1 in one antenna unit 12 to the feeding portions 16a and 16b, and the feeding point 4 of each antenna element 1 in the other antenna unit 12.
The lengths of the power feeding conductors from a, 4b to the power feeding portions 16a, 16b are different by a dimension δA (= L1-L2).

Then, from the feeding points 4a and 4b of each antenna element 1 on one antenna unit 12 side to the feeding section 16
The length of the feeding conductor reaching a, 16b differs from the length of the feeding conductor reaching the feeding portions 16a, 16b from the feeding points 4a, 4b of each antenna element 1 on the side of the other antenna unit 12 by a dimension δA. As a result, as shown in FIGS. 14 and 21, the beam directivity angle of the antenna device is changed from the vertical direction of the planar antenna device (direction of an angle of 0 °) to the direction in which the antenna units 12 are lined up by an angle δ (inclination of a roof etc. The beam directivity angle of the antenna device is oriented in the horizontal direction by swinging by the same angle as the gradient).

The relationship between the dimension δA and the angle δ is as follows. δA = Dsin (δ) Here, D is the width of the positional deviation between the antenna elements 1 adjacent in the vertical direction. In the above embodiment, the antenna unit 1
The connection position of the pair of second power feeding conductors 10a, 10b to the first power feeding conductors 6a, 6b in 2 is the first power feeding conductor 6a,
6b, which is the central portion of the pair of third feeding conductors 13a, 13
The connection position of b to the second feeding conductors 10a and 10b is the central portion of the second feeding conductors 10a and 10b. Therefore, from the feeding points 4a and 4b of each antenna element 1 in each antenna unit 12 to the feeding portion 16a. , 16b are the same in length, and therefore, in the direction in which the antenna elements 1 in each antenna unit 12 are arranged (the lateral direction), the beam orientation angle of the antenna device is a planar antenna device. It faces the vertical direction of, but instead of this,
A pair of second feeding conductors 1 in each antenna unit 12
The connection position of 0a, 10b to the first power supply conductors 6a, 6b is shifted from the central portion of the first power supply conductors 6a, 6b, and the pair of third power supply conductors 13a, 13b is connected to the second power supply conductors 10a, 10b. Connect the connection position to the second feeding conductor 10a,
10b is shifted from the central portion, so that the feeding points 4a, 4 of each antenna element 1 in each antenna unit 12
The length of the feeding conductor from b to the feeding portions 16a and 16b is
The beam directivity angle of the antenna device may be sequentially changed by a certain dimension, and in this way, the beam directivity angle of the antenna device is a predetermined angle in the direction in which the antenna elements 1 in each antenna unit 12 are arranged (the direction orthogonal to the inclination direction of the roof 31). The beam directivity angle of the antenna device can be changed and adjusted in a horizontal plane by only swinging the beam, and the beam directivity angle of the antenna device can be brought closer to the direction of the transmitting station.

FIG. 22 shows another embodiment, in which the antenna device main body 29 having the antenna element 1 and the feeding conductor is
It is provided on the inner surface side of the roof material 41 which is the exterior building material of the building 32, and between the waterproof sheet 42 and the base plate 40. Further, a heat insulating material 44 is provided inside the base plate 40,
An aluminum vapor deposition portion 45 formed by aluminum vapor deposition is formed on the outer surface of the heat insulating material 44, and a portion of the aluminum vapor deposition portion 45 facing the antenna device body 29 reflects radio waves from a transmitting station toward the antenna device body 29. It is also used as the reflector 37. The other points are the same as those of the above-described embodiment.

FIG. 23 shows another embodiment, in which the aluminum vapor deposition portion 45 formed on the outer surface of the heat insulating material 44 is inwardly positioned so as to be located on the inner surface of the heat insulating material 44 at the portion facing the antenna device main body 29. The distance between the antenna device main body 29 and the reflector 37 is set such that the antenna device body 29 is bent and thereby the reception of the radio wave by the reflection of the reflector 37 is improved. The other points are the same as those of the above-described embodiment.

FIG. 24 shows another embodiment, in which a portion of the heat insulating material 44 having an aluminum vapor deposition portion 45 formed on the outer surface thereof is bent inwardly so as to face the antenna device main body 29, whereby the electric wave of the radio wave by the reflector 37 is changed. The distance between the antenna device body 29 and the reflector 37 is set so that reception is better.
The other points are the same as those of the above-described embodiment. In addition, in the said Example, although the electric power feeding conductors, such as a pair of 1st electric power feeding conductors 6a and 6b and a pair of 2nd electric power feeding conductors 10a and 10b, are comprised by electroconductive paint or electroconductive tape, it replaces with this. , A pair of first feeding conductors 6a, 6b, a pair of second feeding conductors 10a, 10b, a pair of third feeding conductors 13a, 13
b and the pair of fourth feeding conductors 15a and 15b may be configured by wire cables.

Further, in the above-described embodiment, the planar antenna device is provided with four or eight antenna elements 1, but the number of antenna elements 1 is not limited to the case of the embodiment, and one antenna element 1 is provided. , Two or any other number.
Further, in the above-described embodiment, the midpoints of the long sides 2a and 2b of each antenna element 1 facing each other are paired with the feeding points 4a and 4b, respectively.
However, instead of this, the opposite short side portions 3a, 3
The middle part of b may be a pair of feeding points 4a and 4b, respectively.

[0040]

According to the present invention, since the antenna device body 29 having the antenna element 1 and the feeding conductor is provided on the inner surface side of the exterior building material of the building 30, the antenna device body 29 is exposed to the outside. Therefore, the planar antenna device eliminates the possibility of spoiling the appearance of a building such as a house, and the building can be maintained in a good appearance. Since the antenna device main body 29 is protected by the exterior building material, there is no fear that the planar antenna device will be damaged or radio interference due to external factors such as wind and rain.
Radio waves can be satisfactorily received over a long period of time by the planar antenna device.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a front view showing the basic configuration of the antenna device.

FIG. 3 is a front view of a sheet material 18.

FIG. 4 is a front view of a sheet material 19.

5 is a front view of the sheet material 20. FIG.

FIG. 6 is a front view of the sheet material 21.

7 is a front view of the sheet material 22. FIG.

FIG. 8 is a front view of the sheet material 23.

9 is a front view of the sheet material 24. FIG.

FIG. 10 is a cross-sectional view of the antenna device.

FIG. 11 is a sectional view of a conductive pin portion.

FIG. 12 is a graph showing directional characteristics of the antenna device.

FIG. 13 is a side sectional view showing another embodiment.

FIG. 14 is a side sectional view showing another embodiment.

FIG. 15 is a front view showing the basic configuration of the antenna device.

16 is a front view of the sheet material 18. FIG.

17 is a front view of the sheet material 19. FIG.

FIG. 18 is a front view of the sheet material 20.

FIG. 19 is a cross-sectional view of the antenna device.

FIG. 20 is a sectional view of a conductive pin portion.

FIG. 21 is a graph showing directional characteristics of the antenna device.

FIG. 22 is a side sectional view showing another embodiment.

FIG. 23 is a side sectional view showing another embodiment.

FIG. 24 is a side sectional view showing another embodiment.

FIG. 25 is a front view of a principle configuration showing a conventional example.

[Explanation of Symbols] 1 antenna element 2a long side 2b long side 3a short side 3b short side 4a feeding point 4b feeding point 6a first feeding conductor 6b first feeding conductor 10a second feeding conductor 10b second feeding conductor 11a Second feeding conductor 11b Second feeding conductor 13a Third feeding conductor 13b Third feeding conductor 14a Third feeding conductor 14b Third feeding conductor 15a Fourth feeding conductor 15b Fourth feeding conductor 32 Building 33 Outer wall plate 41 Roofing material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunori Sueyoshi 1-47 Shikitsuhigashi, Naniwa-ku, Osaka-shi, Osaka Kubota Co., Ltd. (72) Inventor Takahiro Mizoguchi Toichiichi, Shizutsu, Naniwa-ku, Osaka 2-47, Kubota Co., Ltd.

Claims (1)

[Claims] 1. A rectangular antenna element (1) is provided, and a pair of opposing side portions of the antenna element (1) are set as a pair of feeding points (4a) and (4b) respectively. In a planar antenna device for reception in which points (4a) and (4b) are connected to a receiver side via a feeding conductor, an antenna device body (29) having the antenna element (1) and a feeding conductor, A planar antenna device for reception provided on the inner surface side of an exterior building material of a building (30).