CN111954958B - Antenna device - Google Patents

Abstract

An antenna device (1) of the present invention includes: a first folded antenna (3), a first wiring (5), and a power supply unit (9) that are arranged on a first surface (2 a) of an insulating substrate (2); a second folded antenna (4) and a second wiring (6) which are arranged on the second surface (2 b) of the insulating substrate (2); and a through hole (7) penetrating through the insulating substrate (2), the first folded antenna (3) is connected with the first wiring (5) through a power supply portion (9), the second folded antenna (4) is connected with the second wiring (6), the first wiring (5) is connected with the second wiring (6) through the through hole (7), the first folded antenna (3) has at least two first parallel line portions (3 n) parallel to each other, the second folded antenna (4) has at least two second parallel line portions (4 n) parallel to each other, and the first parallel line portions (3 n) cross all the second parallel line portions (4 n) respectively when viewed from above.

Description

Antenna device

technical field

The present invention relates to an antenna device for wireless communication, and more particularly to a small-sized antenna device mounted in a portable mobile communication device with a wider frequency band.

Background technique

Miniaturization of portable mobile communication devices is progressing. Along with this, the miniaturization of the antenna device mounted on the above-mentioned equipment has been promoted. For example, a technique for miniaturization by stacking a curved antenna in which a radiating element is formed into a curved shape has been proposed (Patent Document 1) .

The electrical characteristics of such a miniaturized antenna device are greatly affected by the surrounding environment during use. For example, radio wave reflection caused by large-capacity dielectrics such as the human body, metal, etc., magnetic fields radiated from chargers, etc., Changes in electrical characteristics such as narrowing of the frequency band or deviation of the center frequency of the frequency band may occur. As a result, even during the operation of the mobile communication device equipped with the antenna device, there may be a problem that the required performance cannot be exhibited due to the surrounding environment.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2009-182786

Contents of the invention

The technical problem to be solved by the invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a small antenna device that always covers a frequency band requested by a mounted mobile communication device regardless of the surrounding environment at the time of use.

Technical solutions adopted to solve technical problems

An antenna device according to a first aspect of the present invention includes: an insulating substrate; a first folded antenna arranged on a first surface of the insulating substrate, a first wiring, and a power supply unit; The second folded antenna and the second wiring on the two surfaces; and the through hole penetrating from the first surface to the second surface of the insulating substrate, the first folded antenna is connected to the first wiring through the power supply part, the second folded antenna is connected to the first wiring The two wires are connected, the first wire is connected to the second wire through a through hole, the first folded antenna has at least two first parallel wires parallel to each other, and the second folded antenna has at least two second parallel wires parallel to each other When viewed from above, the first parallel line portions intersect with all the second parallel line portions respectively.

Invention effect

According to the antenna device of the present invention, it is possible to provide a small antenna device that always covers a frequency band requested by a mounted mobile communication device regardless of the surrounding environment during use.

Description of drawings

FIG. 1 is a bird's-eye view of a first embodiment of the present invention.

Fig. 2 is a plan view of the first embodiment of the present invention.

Fig. 3 is a cross-sectional view of the line segment A-A' of Fig. 2 .

Fig. 4 is a cross-sectional view of line segment B-B' in Fig. 2 .

Fig. 5 is a cross-sectional view of a modified example of the first embodiment of the present invention.

6 is a plan view of Modification 1 of the arrangement of the antenna of the present invention.

7 is a plan view of Modification 2 of the arrangement of the antenna of the present invention.

Fig. 8 is a bird's-eye view of a second embodiment of the present invention.

Fig. 9 is a plan view of a second embodiment of the present invention.

Detailed ways

Hereinafter, a first embodiment of the present invention will be described based on the drawings.

FIG. 1 is a bird's-eye view of a first embodiment of an antenna device 1 according to the present invention. The first folded antenna 3 , the first wiring 5 , and the feeding section 9 are provided on the first surface 2 a (see FIG. 3 ) of the insulating substrate 2 , and the first folding antenna 3 is connected to the first wiring 5 via the feeding section 9 .

The second folded antenna 4 and the second wiring 6 are arranged on the second surface 2 b (see FIG. 3 ) of the insulating substrate 2 opposite to the first surface 2 a. In addition, the second folded antenna 4 is connected to the second wiring 6 . Further, a through hole 7 penetrating from the first surface 2 a to the second surface 2 b of the insulating substrate 2 is arranged, and the first wiring 5 is electrically connected to the second wiring 6 via the through hole 7 .

FIG. 2 is an enlarged plan view of the vicinity of the area where the first folded antenna 3 and the second folded antenna 4 of FIG. 1 are arranged. The first folded antenna 3 is composed of a curved shape having six first parallel line portions (3-1 to 3-6 in FIG. 2 , hereinafter referred to as 3n), and the second folded antenna 4 is composed of five parallel The second parallel line portion (4-1 to 4-5 in FIG. 2, hereinafter referred to as 4n) is configured in a curved shape.

The first folded antenna 3 and the second folded antenna 4 each formed of a curved shape are arranged to be orthogonal to each other in plan view, and the six first parallel line portions 3n of the first folded antenna 3 are respectively connected to all five lines of the second folded antenna 4. 4 n of 2nd parallel line parts cross|intersect orthogonally in planar view.

In addition, among the six first parallel line portions 3n of the first folded antenna 3, the first parallel line portion 3-1 closest to the feeding portion 9 is arranged so as to be connected to the second wiring 6 with the second folded antenna 4 in plan view ( proximal side) overlap. And, since the length of the five second parallel line portions 4n of the second folded antenna 4 is longer than the entire width of the first folded antenna 3, at the distal end side of the second parallel line portion 4n of the second folded antenna 4 , the first folded antenna 3 is not arranged at a position facing the second folded antenna 4 via the insulating substrate 2 .

Fig. 3 is a cross-sectional view of line segment A-A' shown in Fig. 2 . Among the first parallel line portions 3n of the first folded antenna 3 arranged on the first surface 2a, the first parallel line portion 3-1 closest to the feeding portion 9 is connected to the second folded antenna 4 arranged on the second surface 2b. Respective end portions (4-1 to 4-5 in the figure) of the second parallel line portion 4n face each other with the insulating substrate 2 interposed therebetween.

Fig. 4 is a cross-sectional view of the line segment B-B' shown in Fig. 2 . One first parallel line portion 3-3 in the first parallel line portion 3n of the first folded antenna 3 and each of five second parallel line portions 4n of the second folded antenna 4 (4-1～in the figure 4-5) They face each other across the insulating substrate 2 . Wherein, the first folded antenna 3 and the second folded antenna 4 are electrically separated by the insulating substrate 2 and not directly connected.

In addition, first wiring 5 is arranged on first surface 2 a, and power feeding section 9 is connected to first folded antenna 3 and first wiring 5 via, for example, solder layer 11 , respectively. The power supply unit 9 may also be an electronic circuit module including a power supply circuit for supplying power to the first folded antenna 3 .

On the other hand, the second wiring 6 is further arranged on the second surface 2 b, and the second wiring 6 is directly connected to the second folded antenna 4 . The first wiring 5 is electrically connected to the second wiring 6 through a conductor filled in a through hole 7 penetrating from the first surface 2 a to the second surface 2 b of the insulating substrate 2 .

A modified example of the first embodiment of the present invention is shown in FIG. 5 . This modified example further includes the second surface 2b of the insulating substrate 2, and the insulating substrate 12 covering the second folded antenna 4 and the second wiring 6 on the second surface 2b. In this manner, the second folded antenna 4 may also be disposed on an intermediate layer of a multilayer circuit board in which a plurality of insulating substrates are laminated.

FIG. 6 shows Modification 1 of the antenna arrangement of the first embodiment of the present invention. Here, the planar shape of the second folded antenna 4a is a shape similar to that of the first folded antenna 3a, and is almost the same as a shape rotated 90 degrees clockwise from each other.

FIG. 7 shows Modification 2 of the antenna arrangement of the first embodiment of the present invention. The first folded antenna 3 a is arranged to be shifted in the direction of the arrow from the arrangement of the antenna shown in FIG. 6 . In this way, a part of the plurality of first parallel line portions (not shown) of the first folded antenna 3b may also be arranged so as not to overlap with any second parallel line portion (not shown) of the second folded antenna 4b .

FIG. 8 is a bird's-eye view of an antenna device 21 according to a second embodiment of the present invention. Compared with the antenna device 1 shown in FIG. 1 , the planar shape of the first folded antenna 23 , the position where the feeder 29 is arranged, and the position where the first folded antenna 23 is connected to the first wire 25 via the feeder 29 are different. The other parts are the same as those of the antenna device 1 shown in FIG. 1 , and therefore description thereof will be omitted.

FIG. 9 is an enlarged plan view of the vicinity of a region where the first folded antenna 23 and the second folded antenna 24 of FIG. 8 are disposed. The first folded antenna 23 is constituted by a curved shape having at least six first parallel line portions (symbols not shown) parallel to each other. The shape of the first folded antenna 23 is mirror-symmetrical to the shape of the first folded antenna 3 shown in FIG. 2 with respect to the line segment parallel to the first parallel line portion 3n.

On the other hand, the planar shape and arrangement position of the second folded antenna 24 are the same as those of the antenna device 1 shown in FIG. 2 .

In addition, among the six first parallel line portions of the first folded antenna 23, the first parallel line portion closest to the power feeding portion 29 is disposed so as to be connected to the portion (near end) connected to the second wiring 26 from the second folded antenna 24 in plan view. side) the farthest distal side overlaps. Furthermore, the first folded antenna 23 is not disposed at a position facing the second folded antenna 24 via the insulating substrate 2 on the proximal side of the second parallel line portion (not shown) of the second folded antenna 24 .

In addition, as described above, although the arrangement position of the first folded antenna 23 in the second embodiment is different from the arrangement position of the first folded antenna 3 in the first embodiment, the six first parallel line parts of the first folded antenna 23 are respectively The same as the first embodiment in that they overlap with all five second parallel line portions of the second folded antenna 24 in a plan view, and their overlapping areas are also almost the same, and their electrical characteristics are also almost the same.

<Mode of the present invention>

An antenna device according to a first aspect of the present invention includes: an insulating substrate; a first folded antenna arranged on a first surface of the insulating substrate, a first wiring, and a power supply unit; The second folded antenna and the second wiring on the second surface; and the through hole penetrating from the first surface to the second surface of the insulating substrate, the first folded antenna is connected to the first wiring through the power supply part, and the second folded antenna It is connected to the second wiring, the first wiring is connected to the second wiring through a through hole, the first folded antenna has at least two first parallel line parts parallel to each other, and the second folded antenna has at least two second parallel line parts parallel to each other. For the parallel line portions, the first parallel line portions intersect with all the second parallel line portions in a plan view.

According to a second aspect of the present invention, in the above-mentioned first embodiment, the first parallel line portions of the first folded antenna are respectively perpendicular to all the second parallel line portions of the second folded antenna in plan view.

According to a third aspect of the present invention, in the first embodiment or the second embodiment, both the first folded antenna and the second folded antenna have a curved shape.

According to a fourth aspect of the present invention, in the above-mentioned third aspect, the first folded antenna and the second folded antenna are similar in shape to each other, and are arranged rotated 90 degrees from each other in plan view.

Label description

1, 21 Antenna device

2, 12, 22 insulating substrate

2a First side

2b second side

3, 3a, 3b, 23 First folded antenna

3n, 3-1, 3-2, 3-3, 3-4, 3-5, 3-6 first parallel line part

4, 4a, 4b, 24 Second folded antenna

4n, 4-1, 4-2, 4-3, 4-4, 4-5 second parallel line part

5.25 First wiring

6.26 Second wiring

7, 27 through holes

9.29 Power Supply Department

11 Solder layer.

Claims (4)

1. An antenna device, characterized in that, comprising: insulating substrate; a first folded antenna, a first wiring, and a power supply part arranged on the first surface of the insulating substrate; a second folded antenna and a second wiring arranged on a second surface of the insulating substrate opposite to the first surface; and a through hole penetrating from the first surface of the insulating substrate to the second surface, The first folded antenna is connected to the first wire through the power supply part, the second folded antenna is connected to the second wire, and the first wire is connected to the second wire through the through hole. Wiring is connected, The first folded antenna has at least two first parallel line parts parallel to each other, and the second folded antenna has at least two second parallel line parts parallel to each other. When viewed from above, the first parallel line parts are respectively Intersects all of the second parallel line portions. 2. The antenna device according to claim 1, wherein The first parallel line portions of the first folded antenna are perpendicular to all of the second parallel line portions of the second folded antenna in a plan view. 3. The antenna device according to claim 1 or 2, characterized in that, Both the first folded antenna and the second folded antenna have a curved shape. 4. The antenna device according to claim 3, wherein: The first folded antenna is composed of a curved shape having at least two first parallel line portions parallel to each other, and the second folded antenna is composed of a curved shape having at least two second parallel line portions parallel to each other. configuration, and are arranged rotated 90 degrees from each other when viewed from above.

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