JPH11195915A - Glass antenna for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve directive characteristics, to receive broadcast(waves suitably and to effectively arrange antenna wires by arranging 1st to 8th conductive wires of a glass antenna which is formed by arranging plural conductive wires on a side window glass for a vehicle in prescribed directions and connecting respective conductive wires so as to form one conductive wire. SOLUTION: A feeder part 2 and a 1st conductive wire 31 which extends up to the middle part of a left side along the side of a 1st side from the part 2 are arranged on the inner side of plate glass 1 that is attached to one side window glass for a vehicle. A 2nd conductive wire 32 which is connected to the wire 31 and extends almost to the center part of the widow glass is arranged and a 3rd conductive wire 33 which is connected to the wire 32 and extends almost to the center part of a side that adjoins the 1st side. A 4th conductive wire 34 which is connected to the 3rd conductive wire and extends almost to the corner along the bottom side toward a 3rd side that faces the 1st side. Similarly, it is connected and arranged up to a 8th conductive wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna provided on a side window glass for a vehicle such as an automobile, and more particularly, to a glass antenna provided with a glass antenna.
The present invention relates to a glass antenna suitable for receiving M radio broadcast waves and AM radio broadcast waves.

[0002]

2. Description of the Related Art Conventionally, as a glass antenna for a vehicle, an antenna provided in an upper margin portion or a lower margin portion of a conductive wire for heating a rear window glass, and an antenna provided with a linear antenna in a front window glass. It is known and has been put to practical use, but in the former case, the space occupied by the antenna is small because the space is originally small and the view may be obstructed, so that a sufficient receiving gain cannot always be obtained. Did not.

Further, the antenna provided on the front windowpane has a relatively high reception gain, but there is a restriction on a mounting place beyond that of the rear windowpane so as not to obstruct the driver's view.
Therefore, due to the widespread use of RVs equipped with side windows having relatively large areas and relatively few such windows, antennas provided on the side windows have attracted attention. 61509, JP-A-61-265
Numerous applications such as 904 have been filed.

[0004]

However, most proposals relate to antennas for receiving TV broadcast waves, and few proposals have been made for antennas for receiving FM radio broadcast waves and AM radio broadcast waves.

[0005] Especially in the case of RV vehicles, the rear window glass can be opened and closed in many cases, and even if the rear window glass does not open and close, the size of the rear window glass is small and the mounting angle is almost vertical. The occupied area of the antenna in the upper margin or lower margin of the wire is small, and even if an antenna wire is provided in this location, sufficient reception gain cannot be obtained, and particularly AM radio broadcast waves and FM radio broadcasts having low reception frequencies. This is remarkable in the case of antenna strips for receiving waves. In recent years, antennas for radio broadcast reception provided on side window glasses have been demanded, but proposals have hardly been made. .

In addition, when a system in which a plurality of antennas are provided to receive a radio wave in an ultrashort wave band such as an FM radio broadcast wave and the reception is switched to a higher reception gain is adopted, the gain of a single antenna is increased in a certain direction. Although it was possible to use even those with strong directional characteristics such as dips,
When diversity reception is not performed, such a diversity antenna cannot be put to practical use.

[0007] The present invention has been made in view of such a point, and by improving the directivity characteristics, not only FM radio broadcast waves can be suitably received, but also AM radio broadcast waves can be received alone. It is an object of the present invention to provide a glass antenna in which antenna strips that can be effectively disposed on a side window glass.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an embodiment of the present invention is directed to a glass antenna for an automobile in which a plurality of conductive wires are disposed on a side window glass for a vehicle. , A first conductive wire extending from a power supply portion disposed on any one of the first sides of the window glass to a substantially central portion along the side, and a window glass connected to the first conductive wire. And a third conductive line connected to the second conductive line and extending to a substantially central portion of a second side, which is one of the sides adjacent to the first side. A fourth conductive wire connected to the third conductive wire and extending to a third side opposite to the first side to a corner of the second side; and a fourth conductive line. A fifth conductive wire connected to the first wire and extending along a third side facing the first side to substantially the center of the third side; A sixth conductive wire connected to the wire and extending to a substantially central portion of the window glass; a seventh conductive wire connected to the sixth conductive wire and extending to a substantially central portion of a fourth side opposed to the second side; And an eighth conductive wire connected to the seventh conductive wire and extending along the fourth side to approximately one corner.
At least.

According to a second aspect of the present invention, the first conductive wire is omitted from the configuration of the first aspect, and the power supply portion is disposed at the center of one of the sides. Starting from the strip, the same configuration is applied to the eighth conductive strip, and in this case, the reference numeral is changed from the second conductive strip to the eighth conductive strip to the first conductive strip to the seventh conductive strip. Move up to the conductive wire.

According to a third aspect of the present invention, in the configuration of the first aspect, a conductive wire is further added to an adjacent side between the first conductive wire and the power supply portion, and power is supplied from the conductive wire. In addition to the structure described above, a line corresponding to the eighth conductive line is not necessarily required, and the reference numeral in this case is such that the added conductive line is used as the first conductive line. The first to seventh conductive lines in claim 1 are moved up to the second to eighth conductive lines.

Further, a U-shaped folded portion connecting the ends of the two parallel wires may be inserted into a part of the feeding portion or the antenna. Furthermore, each conductive wire may be entirely formed by one conductive wire, or all or a part thereof may be formed by two or more conductive wires.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The feeder, which is the starting point of the antenna of the present invention, may be provided on any of the four side window glasses. , The center of the side as shown in the third embodiment, or between the corner and the center of the side as shown in the second and fourth embodiments. I just need.

[0013] Regarding the configuration of the antenna, the configuration shown in claim 1 is a case where the power supply section is provided not at the center of any side but at the corner or between the center and the center. The first conductive line is a line extending to the center of the side (first side). Hereinafter, the second conductive line connected to the first conductive line and extending substantially to the center of the window glass. A third line connected to the second conductive line and extending to a substantially central portion of a second side which is one of the sides adjacent to the first side; and a third conductive line Connected to the article, the second
A fourth conductive line extending toward a third side facing the first side up to a corner of the side, and a third side connected to the fourth conductive line and facing the first side. A fifth conductive line extending to a substantially central portion of the side along the sixth conductive line, a sixth conductive line connected to the fifth conductive line and extending to a substantially central portion of the window glass, and a sixth conductive line. A seventh conductive line that is connected and extends to a substantially central portion of a fourth side opposite to the second side; and a seventh conductive line that is connected to the seventh conductive line and extends along the fourth side to approximately one corner. At least an eighth conductive wire extending is provided.

According to a second aspect of the present invention, the power supply portion is provided at the center of any one of the sides. And is referred to as a first conductive wire to a seventh conductive wire.

According to a third aspect of the present invention, in the configuration of the first aspect, a conductive wire is further added to an adjacent side between the first conductive wire and the power supply portion, and power is supplied from the conductive wire. And a structure corresponding to the eighth conductive wire is not necessarily required. In this case, the additional conductive wire is used as the first conductive wire. The first to seventh conductive lines in claim 1 are referred to as the second to eighth conductive lines in a reduced manner.

In any case, it is preferable that the conductive wire extending along each side is arranged at least 10 mm away from the metal body so that the reception gain is not reduced by the influence of the metal body.

According to the antenna of the present invention, the wire extending along the plurality of sides to the center thereof, the conductive wire extending from the center of the plurality of sides to the center of the window glass, An E-shape in which one end of three horizontal lines provided on the upper and lower sides and the central portion is connected by a vertical line on one side by combining conductive lines extending from to the center of any side. Compared to the above pattern or the pattern of one round over the entire circumference, the entire glass surface can be used more effectively, so that the reception gain can be further increased for AM radio broadcast waves and FM radio broadcast waves. Further, by forming part or all of the conductive wire in a double form, it is possible to increase the receiving area of the antenna, thereby improving the receiving gain for AM radio broadcast waves. It can be.

In particular, to improve the reception gain for FM radio broadcast waves or to improve the directional characteristics,
Alternatively, to adjust the impedance,
Vertical streaks, or L-shaped combination of these, T
Various auxiliary elements such as U-shape and U-shape can be added. When receiving FM radio broadcast wave, AM radio broadcast wave, long wave or short wave, add impedance matching circuit and preamplifier circuit as external circuit. You may.

Further, the antenna of the present invention can be provided on either the left or right side window glass to receive AM radio broadcast waves and FM radio broadcast waves independently, but when receiving FM radio broadcast waves, A glass antenna for receiving an FM radio broadcast wave provided on the other side window glass (an antenna having the configuration of the present invention is preferable, but a glass antenna having another configuration may be used), or an FM radio provided on the rear window glass Of course, diversity reception may be performed in combination with a glass antenna for receiving broadcast waves, a glass antenna provided on the front window glass, a hop antenna, or the like.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 are front views of the antennas according to the first to fourth embodiments mounted on one side window glass when viewed from the outside of the vehicle. FIGS.
FIG. 4 is a directional characteristic diagram at 4 MHz.

Embodiment 1 An embodiment corresponding to claims 1 and 5, wherein the first side is a left side, and is mounted on one side window glass for a vehicle as shown in FIG. A power supply unit 2 is provided on the inner surface of the glass sheet 1.
A first conductive line 31 having a length of 150 mm extending from the power supply unit 2 along the left side as the first side to the center of the side, and connected to the first conductive line, A second conductive wire 3 having a length of 270 mm extending to a substantially central portion of the glass 3
2 and a length connected to the second conductive line and extending to a substantially central portion of a side (lower side in this example) adjacent to the first side is 1
A third conductive wire 33 of 80 mm and a length connected to the third conductive wire and extending toward the third side (right side) facing the first side to a corner substantially along the lower side. 270m
m and a third conductive line 34 connected to the fourth conductive line and extending along a third side (right side) facing the first side to a substantially central portion of the side. A fifth conductive wire 35 having a length of 180 mm, a sixth conductive wire 36 having a length of 250 mm connected to the fifth conductive wire and extending almost to the center of the window glass, and a sixth conductive wire connected thereto; And a length extending to a substantially central portion of a fourth side (upper side) facing the second side is 1
A seventh conductive wire 37 having a length of 80 mm and a third wire connected to the seventh conductive wire and having a length of 230 mm extending toward a third side (right side) to a corner along a fourth side (upper side) to a corner. AM radio broadcast wave and FM of the present invention composed of eight conductive wires
The glass antenna 3 for receiving the radio broadcast wave is formed by screen printing before bending and baking simultaneously with the bending.

The dimensions of the sheet glass 1 thus obtained were A = 630 mm, A ′ = 630 mm, B = 450 m
m, B '= 430 mm and attached to the side window glass of the car, which is approximately the center of the domestic FM radio broadcast wave band.
FIG. 5 shows the result of measuring the directional characteristics of a radio wave in the FM radio band of MHz.

As is apparent from the result, there is almost no drop (dip) in the reception gain due to the difference in the direction of arrival of the radio wave, and it shows an extremely good directional characteristic. In addition, the radio wave of the AM radio band of 530 KHz to 1600 KHz is received by the antenna 3 ′ attached to the other windowpane, and a conductive wire is formed around the windowpane from the feeder at the corner to the side windowpane of substantially the same size. Compared with an antenna that has made one round (hereinafter, referred to as a comparative example), the antenna is improved by about 2 dB over almost the entire region, and it can be seen that this is a good antenna.

Embodiment 2 to Embodiment 4 Embodiment 2 shown in FIG. 2 corresponds to claims 1 and 6, wherein the sixth conductive wire and the seventh conductive wire are formed by two conductive wires. This is an example of forming and adding an auxiliary element.

The length of the antenna 3 extending from the feeding section 2 to the center of the first side along the left side is 80.
mm and a length of 250 mm which is connected to the first conductive wire and extends to almost the center of the window glass.
A second conductive wire 32 and a second conductive wire,
A third conductive wire 33 having a length of 180 mm extending almost to the center of a side (lower side in this example) adjacent to the first side;
A fourth conductive wire 34 connected to the third conductive wire and having a length of 300 mm extending toward a third side (right side) facing the first side to a corner substantially along a lower side; A length extending along a third side (right side) facing the first side and extending to a substantially central portion of the side is connected to the fourth conductive line.
A fifth conductive wire 35 of 80 mm and a length of 280 m connected to the fifth conductive wire and extending almost to the center of the window glass;
m is a length of 180 mm and a length of 160 mm, which are connected to the sixth conductive wire 36 and the fourth conductive wire (upper side) which is connected to the sixth conductive wire and extend to almost the center of the fourth side (upper side). Seventh of
And the seventh conductive wire 37, 37 ′.
7 ′, the length extending toward the third side (right side) to the corner along the fourth side (upper side) is 270 mm
And the eighth conductive wire 38, 38 'having a length of 250 mm, as shown in FIG.
Inverted L-shaped auxiliary element 4 composed of a vertical line of 0 mm and a horizontal line of 170 mm in length and a length of 180
A supplementary element 5 having a length of 60 mm and a supplementary element 6 having a length of 60 mm are added. The other configuration such as the dimensions of the sheet glass is the same as that of the first embodiment.

Embodiment 3 shown in FIG. 3 corresponds to Claims 2 and 6, wherein the first side is the lower side and the first conductive line to the sixth conductive line are doubled. And the seventh conductive wire is disposed separately, and further extended wires 38, 38 ',
An auxiliary element 7 is added.

The antenna 3 has a first conductive wire 3 having a length of 140 mm and 160 mm extending from the feeding portion 2 disposed at the center of the lower side, which is the first side, to approximately the center of the window glass.
1, 31 'and the second conductive wires having lengths of 270 mm and 270 mm, which are connected to the first conductive wire and extend to almost the center of the side (the left side in this example) adjacent to the first side. 3
2, 32 'and 220 mm and 180 mm, which are connected to the second conductive wire and extend toward the third side (upper side) facing the first side almost to the corner along the left side. The third conductive wire 33, 33 'is connected to the third conductive wire and extends along a third side (upper side) facing the first side to a substantially central portion of the side. 290mm and 250
mm, and a length of 16 mm, which is connected to the fourth wire and extends almost to the center of the window glass.
0 mm and 160 mm fifth conductive wires 35 and 35 ′,
The length connected to the fifth conductive wire and extending to almost the center of the fourth side (right side) facing the second side is 250 mm.
And a 270 mm sixth conductive wire 36, 36 ′, and a seventh conductive wire 37 connected to the sixth conductive wire 36 and extending 160 mm in length along the fourth side to the upper right corner.
A seventh conductive wire 37 'connected to the sixth conductive wire 36' and extending to the lower right corner along the fourth side and having a length of 180 mm has a basic configuration. Are connected to the extension wire 38 having a length of 200 mm and the extension wire 38 ′ having a length of 180 mm connected to the seventh conductive wire 37 ′. The auxiliary element 7 is added.

Embodiment 4 shown in FIG. 4 is an example corresponding to Claims 3, 4 and 6, wherein the first side is the right side and the fifth conductive line to the eighth conductive line. The wire is double-formed up to the wire, the extended wire is connected to each wire, and the U-shaped folded portion 3A connecting the ends of the two parallel wires is inserted into a part of the antenna. Is added.

The antenna 3 includes a first conductive wire 31 extending from the power supply unit 2 disposed on the right side as the first side to almost any corner along the side, and a first conductive wire 31. , A second line 32 extending to a central portion along a second side adjacent to the first side, a folded portion 3A connected to the second conductive line, and a folded portion connected to the folded portion. A third conductive line 33 extending to a substantially central portion of the window glass; and a fourth conductive line connected to the third conductive line and extending to a substantially central portion of a side (left side) opposed to the first side. A line 34 and two fifth conductive lines 35, 35 'connected to the fourth conductive line and extending along the first side to the upper left corner;
Two sixth conductive wires 36, 36 'connected to the fifth conductive wire and extending to the center along the fourth side (upper side) facing the second side and the sixth conductive wire Two seventh conductive strips 37, 37 'connected to the strip and extending to the center of the window glass
And eight extended conductive lines connected to the seventh conductive line and extending to the center of the first side (right side), and further extended lines connected to the eighth conductive line Article 39, 39 '
And an auxiliary element 8 disposed along the first conductive wire 31 and the second conductive wire 32 is added.

The glass antennas 3 of Embodiments 2 to 4 obtained in this manner also have the same reception performance with respect to FM radio broadcast waves as the antenna 3 of Embodiment 1 and the like, respectively. It was confirmed that both of them had better receiving performance than the first embodiment with respect to broadcast waves.

[0031]

As described above, the glass antenna of the present invention, even if it is an antenna provided on the side window glass,
Not only can FM radio broadcast waves and AM radio broadcast waves be received with high gain, but especially FM radio broadcast waves can be independently received because their directional characteristics are close to non-directional.

[Brief description of the drawings]

FIG. 1 is a front view in which an antenna according to a first embodiment is disposed on one side window glass when viewed from the outside of a vehicle.

FIG. 2 is a front view showing Embodiment 2 in which the glass antenna of the present invention is provided on one side window glass for an automobile.

FIG. 3 is a front view showing a third embodiment in which the glass antenna of the present invention is provided on one side window glass for an automobile.

FIG. 4 is a front view showing a fourth embodiment in which the glass antenna of the present invention is provided on one side window glass for an automobile.

FIG. 5 is a directional pattern when 84 MHz radio waves in the FM radio band are received by the antenna according to the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet glass 2 Feeding part 3 Glass antenna of this invention 4-9 Auxiliary element

Claims (6)

[Claims] 1. A glass antenna for an automobile in which a plurality of conductive wires are arranged on a side window glass for a vehicle.
A first conductive wire extending from the power supply portion disposed on one of the first sides to a substantially central portion along the side, and connected to the first conductive wire to a substantially central portion of the window glass; A second conductive line extending to the second conductive line, and a third line extending to a substantially central portion of a second side which is one of sides adjacent to the first side; , A third conductive wire connected to the third conductive wire and facing the first side up to the corner of the second side.
A fourth conductive line extending toward the side, and a fifth conductive line connected to the fourth conductive line and extending along the third side opposed to the first side to substantially the center of the side. A sixth wire connected to the fifth conductive wire and extending to a substantially central portion of the window glass;
And a seventh conductive wire connected to the sixth conductive wire and extending to a substantially central portion of a fourth side facing the second side, and a seventh conductive wire connected to the seventh conductive wire. A glass antenna for an automobile, comprising at least an eighth conductive wire extending along a fourth side to approximately one of the corners. 2. A glass antenna for an automobile in which a plurality of conductive wires are arranged on a side window glass for a vehicle.
A first conductive line extending from a power supply portion disposed substantially at the center of any one of the sides to a substantially central portion of the window glass; and a first side connected to the first conductive line and connected to the first conductive line. And a second side extending to a substantially central portion of a second side, which is any side adjacent to the second side.
A third conductive wire connected to the second conductive wire and extending to a third side opposite to the first side to a corner of the second side; A fourth conductive wire connected to the conductive wire and extending along the third side opposed to the first side to a substantially central portion of the side, and a fourth portion of the window glass connected to the fourth conductive wire. A fifth conductive strip extending to the center,
A sixth conductive wire connected to the fifth conductive wire and extending to substantially the center of the fourth side facing the second side, and a sixth conductive wire connected to the sixth conductive wire and having a fourth side. And a seventh conductive wire extending substantially to any one of the corners. 3. A glass antenna for an automobile in which a plurality of conductive wires are disposed on a side window glass for a vehicle.
A first conductive line extending from the power supply portion disposed on any one of the first sides to approximately one corner along the side; a first side connected to the first conductive line; A second conductive line extending to a central portion along a second side adjacent to the second conductive line;
A third conductive wire connected to the second conductive wire and extending to substantially the center of the window glass; and a third conductive wire connected to the third conductive wire and facing the first side or the first side. A fourth conductive wire extending to a substantially central portion of the side, a fifth conductive wire connected to the fourth conductive wire and extending to a corner of the first side or a side opposite to the first side; A sixth conductive wire connected to the fifth conductive wire and extending to the center along a fourth side opposite to the second side; and a sixth conductive wire connected to the sixth conductive wire, A seventh conductive wire extending substantially to the center;
And an eighth conductive wire extending to the third side or the center of the first side. 4. The antenna according to claim 1, wherein a U-shaped folded portion connecting the ends of the two parallel lines is inserted into a part of the feeding portion or the antenna. A glass antenna for an automobile as described in the above. 5. The method according to claim 1, wherein all of the conductive wires are formed by one conductive wire.
A glass antenna for an automobile according to any one of the above. 6. The glass antenna for an automobile according to claim 1, wherein at least one of the conductive wires is formed by a plurality of conductive wires.