CN111954958A - Antenna device - Google Patents

Abstract

The antenna device (1) of the present invention comprises: a first folded antenna (3), a first wiring (5) and a power supply part (9) arranged on a first surface (2a) of an insulating substrate (2); a second folded antenna (4) and a second wiring (6) on the second side (2b) of the substrate (2); and a through hole (7) penetrating the insulating substrate (2) through which the first folded antenna (3) passes The power supply part (9) is connected to the first wiring (5), the second folded antenna (4) is connected to the second wiring (6), and the first wiring (5) is connected to the second wiring (6) through the through hole (7). ) connection, the first folded antenna (3) has at least two first parallel line parts (3n) that are parallel to each other, and the second folded antenna (4) has at least two second parallel line parts (4n) that are parallel to each other. In a plan view, the first parallel line portions (3n) respectively intersect with all the second parallel line portions (4n).

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 on a portable mobile communication device with a wider frequency band.

Background technique

The 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 advanced, and for example, a technique for miniaturization by stacking a curved antenna having a radiating element formed in 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 at the time of use, for example, the effects of radio wave reflection due to large-capacity dielectric materials such as the human body, metals, etc., and magnetic fields radiated from chargers, etc., Variations in electrical characteristics such as band narrowing or shift in the center frequency of the band 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 Literature

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

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention

The present invention has been made in view of the above-mentioned problems, and an object thereof 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, a first wiring, and a feeding part arranged on a first surface of the insulating substrate; The second folded antenna and the second wiring on the two sides; and the through hole penetrating from the first side to the second side of the insulating substrate, the first folded antenna is connected with the first wiring through the power supply part, and the second folded antenna is connected with the first wiring. The two wirings are connected, the first wiring is connected with the second wiring through the 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 lines parallel to each other Each of the first parallel line portions intersects all of the second parallel line portions in a plan view.

Invention effect

According to the antenna device of the present invention, it is possible to provide a small-sized 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.

Description of drawings

FIG. 1 is a bird's-eye view of the 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 along line A-A' of FIG. 2 .

FIG. 4 is a cross-sectional view of the line segment B-B' of FIG. 2 .

5 is a cross-sectional view of a modification of the first embodiment of the present invention.

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

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

FIG. 8 is a bird's-eye view of the 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 the first embodiment of the antenna device 1 of the present invention. The first folded antenna 3 , the first wiring 5 and the feeding portion 9 are provided on the first surface 2 a (see FIG. 3 ) of the insulating substrate 2 , and the first folded antenna 3 is connected to the first wiring 5 via the feeding portion 9 .

The second folded antenna 4 and the second wiring 6 are arranged on the second surface 2b (refer to FIG. 3 ) of the insulating substrate 2 opposite to the first surface 2a. In addition, the second folded antenna 4 is connected to the second wiring 6 . Further, through holes 7 penetrating from the first surface 2 a to the second surface 2 b of the insulating substrate 2 are arranged, and the first wirings 5 are electrically connected to the second wirings 6 via the through holes 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 has a curved shape having six first parallel line parts (3-1 to 3-6 in FIG. 2, hereinafter referred to as 3n) parallel to each other, and the second folded antenna 4 has five parallel lines. The second parallel line portion (4-1 to 4-5 in FIG. 2, hereinafter referred to as 4n) is formed in a curved shape.

The first folded antenna 3 and the second folded antenna 4, which are respectively formed of curved shapes, 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 of the second folded antennas 4. The second parallel line portions 4n intersect at right angles in a plan view.

Further, 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 portion of the second folded antenna 4 to the second wiring 6 in plan view ( proximal side) overlap. Furthermore, 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, 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. , the first folded antenna 3 is not arranged at a position opposite to the second folded antenna 4 via the insulating substrate 2 .

FIG. 3 is a cross-sectional view of the line segment A-A' shown in FIG. 2 . Among the first parallel line parts 3n of the first folded antenna 3 arranged on the first surface 2a, the first parallel line part 3-1 closest to the feeding part 9 and the second folded antenna 4 arranged on the second surface 2b The respective end portions (4-1 to 4-5 in the drawing) of the second parallel line portion 4n face each other with the insulating substrate 2 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 of the first parallel line portions 3n of the first folded antenna 3 and each of the five second parallel line portions 4n of the second folded antenna 4 (4-1~ 4-5) Oppose each other with the insulating substrate 2 sandwiched therebetween. The first folded antenna 3 and the second folded antenna 4 are electrically separated by the insulating substrate 2 and are not directly connected.

In addition, the first wiring 5 is also arranged on the first surface 2a, and the power supply portion 9 is connected to the first folded antenna 3 and the first wiring 5, respectively, through, for example, a solder layer 11. The power supply unit 9 may 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 by a conductor filled in the through hole 7 penetrating from the first surface 2 a to the second surface 2 b of the insulating substrate 2 .

FIG. 5 shows a modification of the first embodiment of the present invention. This modification 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 way, the second folded antenna 4 may be arranged on the intermediate layer of the multilayer circuit board in which a plurality of insulating substrates are stacked.

FIG. 6 shows a modification 1 of the arrangement of the antenna according to 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 the shape rotated 90 degrees clockwise from each other.

FIG. 7 shows a modification 2 of the arrangement of the antenna according to the first embodiment of the present invention. The first folded antenna 3a is arranged so as 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 be arranged so as not to overlap any second parallel line portions (not shown) of the second folded antenna 4b .

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

FIG. 9 is an enlarged plan view of the vicinity of the region where the first folded antenna 23 and the second folded antenna 24 of FIG. 8 are arranged. The first folded antenna 23 is formed of a curved shape having at least six first parallel line portions (reference numerals 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 a 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 feeding portion 29 is arranged so as to be connected to the portion (the proximal end) from the second folded antenna 24 and the second wiring 26 in plan view. side) the farthest distal side overlaps. Furthermore, the first folded antenna 23 is not arranged at a position facing the second folded antenna 24 via the insulating substrate 2 on the proximal end 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 of the second embodiment is different from that of the first folded antenna 3 of the first embodiment, the six first parallel line portions of the first folded antenna 23 are respectively It overlaps with all five second parallel line portions of the second folded antenna 24 in plan view, as in the first embodiment, and their overlapping areas are also almost the same, and their electrical characteristics are also almost the same.

<Form of the present invention>

An antenna device according to a first aspect of the present invention includes: an insulating substrate; a first folded antenna, a first wiring, and a feeding portion arranged on a first surface of the insulating substrate; A second folded antenna and a second wiring on the second surface; and a 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 connected with the second wiring, the first wiring is connected with the second wiring through the 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 wiring parts parallel to each other As for the parallel line parts, the first parallel line parts respectively intersect with all the second parallel line parts in a plan view.

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

According to the third aspect of the present invention, in the above-mentioned first embodiment or the above-mentioned 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 third aspect described above, the first folded antenna and the second folded antenna are similar in shape to each other, and are arranged to be 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 The first folded antenna

3n, 3-1, 3-2, 3-3, 3-4, 3-5, 3-6 The 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 section

5, 25 The first wiring

6, 26 Second wiring

7, 27 through hole

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 disposed on a second surface of the insulating substrate opposite to the first surface; and a 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 second wiring, and the first wiring is connected to the second wiring through the through hole wiring is connected, The first folded antenna has at least two first parallel line parts that are parallel to each other, and the second folded antenna has at least two second parallel line parts that are parallel to each other. In a plan view, the first parallel line parts are respectively intersects all of the second parallel line portions. 2. The antenna device according to claim 1, wherein, In a plan view, the first parallel line portions of the first folded antenna are respectively orthogonal to all the second parallel line portions of the second folded antenna. 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 of claim 3, wherein The first folded antenna and the second folded antenna are similar in shape to each other, and are arranged to be rotated 90 degrees from each other in plan view.

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