JP6978969B2 - Antenna device - Google Patents

Antenna device Download PDF

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JP6978969B2
JP6978969B2 JP2018056848A JP2018056848A JP6978969B2 JP 6978969 B2 JP6978969 B2 JP 6978969B2 JP 2018056848 A JP2018056848 A JP 2018056848A JP 2018056848 A JP2018056848 A JP 2018056848A JP 6978969 B2 JP6978969 B2 JP 6978969B2
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antenna
folded antenna
folded
parallel line
wiring
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JP2019169872A (en
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淳 鈴木
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FDK Corp
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FDK Corp
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Priority to JP2018056848A priority Critical patent/JP6978969B2/en
Priority to PCT/JP2019/001748 priority patent/WO2019181169A1/en
Priority to CN201980021486.8A priority patent/CN111954958B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

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  • Aerials With Secondary Devices (AREA)

Description

本発明は無線通信用のアンテナ装置に関し、特に、携帯用の移動通信機器に搭載される、周波数帯域を広帯域化した小型のアンテナ装置に関する。 The present invention relates to an antenna device for wireless communication, and more particularly to a small antenna device having a wide frequency band, which is mounted on a portable mobile communication device.

携帯用の移動通信機器の小型化が進展している。これに伴い、それらの機器に搭載されるアンテナ装置の小型化が推進され、例えば、放射エレメントがミアンダ形状に形成されるミアンダアンテナを積層して小型化する技術が提案されている（特許文献１）。 The miniaturization of portable mobile communication devices is progressing. Along with this, miniaturization of antenna devices mounted on these devices has been promoted, and for example, a technique for stacking and miniaturizing a miunder antenna in which a radiating element is formed in a mianda shape has been proposed (Patent Document 1). ).

このような小型化されたアンテナ装置の電気特性は、使用時の周囲環境の影響を大きく受ける。例えば、人体等の大容量の誘電体、金属等による電波の反射、充電器などから放射される磁界、などの影響により、周波数帯域が狭くなる、あるいは周波数帯域の中心周波数がずれるなどの電気特性の変動が生じる。その結果、当該アンテナ装置が搭載された移動通信機器の動作中においても、周囲環境によって要求性能を発揮できない不具合が生じることがある。 The electrical characteristics of such a miniaturized antenna device are greatly affected by the surrounding environment during use. For example, electrical characteristics such as the frequency band narrowing or the center frequency of the frequency band shifting due to the effects of large-capacity dielectrics such as the human body, reflection of radio waves by metals, and magnetic fields radiated from chargers. Fluctuations occur. As a result, even during the operation of the mobile communication device on which the antenna device is mounted, there may be a problem that the required performance cannot be exhibited depending on the surrounding environment.

特開２００９−１８２７８６号公報Japanese Unexamined Patent Publication No. 2009-182786

本発明はこのような課題に鑑みてなされたものであり、その目的とするところは、使用時の周囲環境にかかわらず、当該アンテナ装置が搭載された移動通信機器が要求する周波数帯域を、常時カバーする小型のアンテナ装置を提供することにある。 The present invention has been made in view of such a problem, and an object of the present invention is to always obtain a frequency band required by a mobile communication device equipped with the antenna device, regardless of the surrounding environment at the time of use. The purpose is to provide a small antenna device to cover.

本発明の第１の態様のアンテナ装置によれば、絶縁性基板と、絶縁性基板の第１の面に配置された、第１の折り返しアンテナ、第１の配線、及び給電部と、絶縁性基板の第１の面と対向する第２の面に配置された、第２の折り返しアンテナ、及び第２の配線と、絶縁性基板の第１の面から第２の面に渡って貫通するビアホールと、を備え、第１の折り返しアンテナは給電部を介して第１の配線と接続され、第２の折り返しアンテナは第２の配線と接続され、第１の配線はビアホールを介して第２の配線と接続され、第１の折り返しアンテナは、少なくとも２本の互いに平行な第１の平行線路部を有し、第２の折り返しアンテナは、少なくとも２本の互いに平行な第２の平行線路部を有し、第１の平行線路部のそれぞれは、第２の平行線路部の全部と平面視で交差する。 According to the antenna device of the first aspect of the present invention, the insulating substrate, the first folded antenna, the first wiring, and the feeding portion arranged on the first surface of the insulating substrate are insulated. A second folded antenna and a second wiring arranged on a second surface facing the first surface of the substrate, and a via hole penetrating from the first surface to the second surface of the insulating substrate. The first folded antenna is connected to the first wiring via the feeding part, the second folded antenna is connected to the second wiring, and the first wiring is connected to the second wiring via the via hole. Connected to the wiring, the first folded antenna has at least two parallel first parallel lines and the second folded antenna has at least two parallel second parallel lines. Each of the first parallel line portions intersects with all of the second parallel line portions in a plan view.

本発明の第２の態様によれば、上記第１の態様において、第１の折り返しアンテナの第１の平行線路部のそれぞれは、第２の折り返しアンテナの第２の平行線路部の全部と平面視で直交する。 According to the second aspect of the present invention, in the first aspect, each of the first parallel line portions of the first folded antenna is flat with the entire second parallel line portion of the second folded antenna. Orthogonal in sight.

本発明の第３の態様によれば、上記第１の態様又は上記第２の態様において、第１の折り返しアンテナ及び第２の折り返しアンテナは、いずれもミアンダ形状を有する。 According to the third aspect of the present invention, in the first aspect or the second aspect, both the first folded antenna and the second folded antenna have a meander shape.

本発明の第４の態様によれば、上記第３の態様において、第１の折り返しアンテナ及び第２の折り返しアンテナは、互いに相似形であり、平面視で互いに９０度回転して配置されてなる。 According to the fourth aspect of the present invention, in the third aspect, the first folded antenna and the second folded antenna are similar to each other and are arranged so as to be rotated 90 degrees from each other in a plan view. ..

本発明のアンテナ装置によれば、使用時の周囲環境にかかわらず、当該アンテナ装置が搭載された移動通信機器が要求する周波数帯域を、常時カバーする小型のアンテナ装置を提供するという効果を奏することができる。 According to the antenna device of the present invention, it is possible to obtain an effect of providing a small antenna device that always covers the frequency band required by the mobile communication device on which the antenna device is mounted, regardless of the surrounding environment at the time of use. Can be done.

本発明の第１の実施形態の鳥瞰図。A bird's-eye view of the first embodiment of the present invention. 本発明の第１の実施形態の平面図。The plan view of the 1st Embodiment of this invention. 図２の線分Ａ−Ａ´の断面図。FIG. 2 is a cross-sectional view of the line segment AA'in FIG. 図２の線分Ｂ−Ｂ´の断面図。FIG. 2 is a cross-sectional view of the line segment BB'in FIG. 本発明の第１の実施形態の変型例の断面図。FIG. 3 is a cross-sectional view of a modified example of the first embodiment of the present invention. 本発明のアンテナの配置の変型例１の平面図。The plan view of the modified example 1 of the arrangement of the antenna of this invention. 本発明のアンテナの配置の変型例２の平面図。The plan view of the modified example 2 of the arrangement of the antenna of this invention. 本発明の第２の実施形態の鳥瞰図。A bird's-eye view of a second embodiment of the present invention. 本発明の第２の実施形態の平面図。The plan view of the 2nd Embodiment of this invention.

以下、図面に基づき本発明の第１の実施形態について説明する。 Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.

図１は、本発明のアンテナ装置１の第１の実施形態の鳥瞰図である。絶縁性基板２の第１の面２ａ（図３参照）には、第１の折り返しアンテナ３、第１の配線５、及び給電部９が配置され、第１の折り返しアンテナ３は給電部９を介して第１の配線５と接続されている。 FIG. 1 is a bird's-eye view of the first embodiment of the antenna device 1 of the present invention. A first folded antenna 3, a first wiring 5, and a feeding portion 9 are arranged on the first surface 2a (see FIG. 3) of the insulating substrate 2, and the first folded antenna 3 has a feeding portion 9. It is connected to the first wiring 5 via.

絶縁性基板２の第１の面２ａと対向する第２の面２ｂ（図３参照）には、第２の折り返しアンテナ４及び第２の配線６が配置されている。なお、第２の折り返しアンテナ４は第２の配線６と接続される。又、絶縁性基板２の第１の面２ａから第２の面２ｂに渡って貫通するビアホール７が配置され、第１の配線５はビアホール７を介して第２の配線６と電気的に接続されている。 A second folded antenna 4 and a second wiring 6 are arranged on a second surface 2b (see FIG. 3) facing the first surface 2a of the insulating substrate 2. The second folded antenna 4 is connected to the second wiring 6. Further, a via hole 7 penetrating from the first surface 2a to the second surface 2b of the insulating substrate 2 is arranged, and the first wiring 5 is electrically connected to the second wiring 6 via the via hole 7. Has been done.

図２は、図１の第１の折り返しアンテナ３及び第２の折り返しアンテナ４が配置された領域を、拡大した平面図である。第１の折り返しアンテナ３は、６本の互いに平行な第１の平行線路部（図２の３−１〜３−６、以下３ｎと記載）を有するミアンダ形状からなり、第２の折り返しアンテナ４は、５本の互いに平行な第２の平行線路部（図２の４−１〜４−５、以下４ｎと記載）を有するミアンダ形状からなる。 FIG. 2 is an enlarged plan view of a region in which the first folded antenna 3 and the second folded antenna 4 of FIG. 1 are arranged. The first folded antenna 3 has a meander shape having six parallel first parallel line portions (3-1 to 3-6 in FIG. 2, hereinafter referred to as 3n), and the second folded antenna 4 has a second folded antenna 4. Consists of a meander shape having five parallel second parallel line portions (4-1 to 4-5 in FIG. 2, hereinafter referred to as 4n).

それぞれがミアンダ形状からなる第１の折り返しアンテナ３及び第２の折り返しアンテナ４は、平面視で互いに直交するように配置され、第１の折り返しアンテナ３の６本の第１の平行線路部３ｎのそれぞれは、第２の折り返しアンテナ４の５本の第２の平行線路部４ｎの全部と平面視で直交するように交差している。 The first folded antenna 3 and the second folded antenna 4, each of which has a meander shape, are arranged so as to be orthogonal to each other in a plan view, and the six first parallel line portions 3n of the first folded antenna 3 are arranged. Each intersects all of the five second parallel line portions 4n of the second folded antenna 4 so as to be orthogonal to each other in a plan view.

又、第１の折り返しアンテナ３の６本の第１の平行線路部３ｎのうち給電部９に最も近い第１の平行線路部３−１が、第２の折り返しアンテナ４が第２の配線６に接続される部分（近端側）と平面視で重なるように配置されている。そして、第２の折り返しアンテナ４の５本の第２の平行線路部４ｎの長さは、第１の折り返しアンテナ３全体の幅より長いため、第２の折り返しアンテナ４の第２の平行線路部４ｎの遠端側では、第２の折り返しアンテナ４と絶縁性基板２を介して対向する位置に第１の折り返しアンテナ３は配置されていない。 Further, of 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 and the second folded antenna 4 are the second wiring 6. It is arranged so as to overlap with the part (near end side) connected to the antenna in a plan view. Since the length of the five second parallel line portions 4n of the second folded antenna 4 is longer than the width of the entire first folded antenna 3, the second parallel line portion of the second folded antenna 4 On the far end side of 4n, the first folded antenna 3 is not arranged at a position facing the second folded antenna 4 via the insulating substrate 2.

図３は、図２に示された線分Ａ−Ａ´の断面図である。第１の面２ａに配置された第１の折り返しアンテナ３の第１の平行線路部３ｎのうちの給電部９に最も近い第１の平行線路部３−１と、第２の面２ｂに配置された第２の折り返しアンテナ４の第２の平行線路部４ｎのそれぞれの端部（図中の４−１〜４−５）とが、絶縁性基板２を挟んで互いに対向している。 FIG. 3 is a cross-sectional view of the line segment AA'shown in FIG. The first parallel line portion 3-1 closest to the feeding portion 9 of the first parallel line portions 3n of the first folded antenna 3 arranged on the first surface 2a, and the first parallel line portion 3-1 arranged on the second surface 2b. The respective ends (4-1 to 4-5 in the figure) of the second parallel line portion 4n of the second folded antenna 4 are opposed to each other with the insulating substrate 2 interposed therebetween.

図４は、図２に示された線分Ｂ−Ｂ´の断面図である。第１の折り返しアンテナ３の第１の平行線路部３ｎのうちの一つの第１の平行線路部３−３と、第２の折り返しアンテナ４の５本の第２の平行線路部４ｎのそれぞれ（図中の４−１〜４−５）とが、絶縁性基板２を挟んで互いに対向している。ただし、第１の折り返しアンテナ３及び第２の折り返しアンテナ４は、絶縁性基板２によって電気的に分離され、直接接続されてはいない。 FIG. 4 is a cross-sectional view of the line segment BB'shown in FIG. Each of the first parallel line portion 3-3 of the first parallel line portion 3n of the first folded antenna 3 and the five second parallel line portions 4n of the second folded antenna 4 ( 4-1 to 4-5) in the figure face each other with the insulating substrate 2 interposed therebetween. However, the first folded antenna 3 and the second folded antenna 4 are electrically separated by the insulating substrate 2 and are not directly connected to each other.

又、第１の面２ａには、更に第１の配線５が配置され、給電部９は、第１の折り返しアンテナ３及び第１の配線５のそれぞれに、例えば半田層１１で接続されている。給電部９は、第１の折り返しアンテナ３に給電する給電回路を備える電子回路モジュールであってもよい。 Further, a first wiring 5 is further arranged on the first surface 2a, and the feeding portion 9 is connected to each of the first folded antenna 3 and the first wiring 5 by, for example, a solder layer 11. .. The feeding unit 9 may be an electronic circuit module including a feeding circuit that feeds the first folded antenna 3.

一方、第２の面２ｂには、更に第２の配線６が配置され、これは第２の折り返しアンテナ４と直接接続されている。第１の配線５は、絶縁性基板２の第１の面２ａから第２の面２ｂまで貫通するビアホール７に充填された導電物を介して第２の配線６と電気的に接続されている。 On the other hand, a second wiring 6 is further arranged on the second surface 2b, which is directly connected to the second folded antenna 4. The first wiring 5 is electrically connected to the second wiring 6 via a conductive material filled in the via hole 7 penetrating from the first surface 2a to the second surface 2b of the insulating substrate 2. ..

図５に、本発明の第１の実施形態の変型例を示す。この変型例は、絶縁性基板２の第２の面２ｂ、並びに第２の面の２ｂ第２の折り返しアンテナ４及び第２の配線６を覆う絶縁性基板１２を更に備える。このように、第２の折り返しアンテナ４は、複数の絶縁性基板が積層された多層回路基板の中間層に配置されていてもよい。 FIG. 5 shows a modified example of the first embodiment of the present invention. This variant further comprises an insulating substrate 12 that covers a second surface 2b of the insulating substrate 2, a second surface 2b, a second folded antenna 4, and a second wiring 6. As described above, the second folded antenna 4 may be arranged in the intermediate layer of the multilayer circuit board in which a plurality of insulating substrates are laminated.

図６に、本発明の第１の実施形態のアンテナの配置の変型例１を示す。ここで、第２の折り返しアンテナ４ａの平面形状は、第１の折り返しアンテナ３ａの平面形状と相似形であり、互いに時計回りに９０度回転させた形状とほぼ同一となっている。 FIG. 6 shows a modified example 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 similar to the planar shape of the first folded antenna 3a, and is substantially the same as the shape rotated 90 degrees clockwise from each other.

図７に、本発明の第１の実施形態のアンテナの配置の変型例２を示す。図６に記載のアンテナの配置から第１の折り返しアンテナ３ａを矢印方向にずらした配置となっている。このように、第１の折り返しアンテナ３ｂの複数の第１の平行線路部（符号は図示せず）の一部が、第２の折り返しアンテナ４ｂの第２の平行線路部（符号は図示せず）のいずれとも重ならない配置であってもよい。 FIG. 7 shows a modified example 2 of the arrangement of the antenna according to the first embodiment of the present invention. The first folded antenna 3a is displaced in the direction of the arrow from the arrangement of the antennas shown in FIG. As described above, a part of the plurality of first parallel line portions (reference numeral is not shown) of the first folded antenna 3b is the second parallel line portion (reference numeral is not shown) of the second folded antenna 4b. ) May be arranged so as not to overlap with any of them.

図８は、本発明の第２の実施形態のアンテナ装置２１の鳥瞰図である。図１に記載のアンテナ装置１と対比すると、第１の折り返しアンテナ２３の平面形状、給電部２９が配置された位置、及び第１の折り返しアンテナ２３が給電部２９を介して第１の配線２５と接続される位置が異なる。その他の部分は、図１に記載のアンテナ装置１と同一であるので説明を省略する。 FIG. 8 is a bird's-eye view of the antenna device 21 according to the second embodiment of the present invention. In comparison with the antenna device 1 shown in FIG. 1, the planar shape of the first folded antenna 23, the position where the feeding portion 29 is arranged, and the first folded antenna 23 are connected to the first wiring 25 via the feeding portion 29. The position to be connected to is different. Since the other parts are the same as those of the antenna device 1 shown in FIG. 1, the description thereof will be omitted.

図９は、図８の第１の折り返しアンテナ２３及び第２の折り返しアンテナ２４が配置された領域を、拡大した平面図である。第１の折り返しアンテナ２３は、少なくとも６本の互いに平行な第１の平行線路部（符号は図示せず）を有するミアンダ形状からなる。第１の折り返しアンテナ２３の形状と、図２に記載の第１の折り返しアンテナ３の形状とは、第１の平行線路部３ｎと平行な線分に対して鏡面対称となっている。 FIG. 9 is an enlarged plan view of a region in which the first folded antenna 23 and the second folded antenna 24 of FIG. 8 are arranged. The first folded antenna 23 has a meander shape having at least six parallel first parallel line portions (not shown). The shape of the first folded antenna 23 and the shape of the first folded antenna 3 shown in FIG. 2 are mirror-symmetrical with respect to a line segment parallel to the first parallel line portion 3n.

一方、第２の折り返しアンテナ２４については、図２に記載のアンテナ装置１と平面形状及び配置された位置が同一である。 On the other hand, the second folded antenna 24 has the same planar shape and arranged position as the antenna device 1 shown in FIG.

又、第１の折り返しアンテナ２３の６本の第１の平行線路部のうち、給電部２９に最も近い第１の平行線路部が、第２の折り返しアンテナ２４が第２の配線２６に接続される部分（近端側）から最も離れた遠端側と平面視で重なるように配置されている。そして、第２の折り返しアンテナ２４の第２の平行線路部（符号図示せず）の近端側では、第２の折り返しアンテナ２４と絶縁性基板２を介して対向する位置に第１の折り返しアンテナ２３は配置されていない。 Further, of the six first parallel line portions of the first folded antenna 23, the first parallel line portion closest to the feeding portion 29 is connected to the second folded antenna 24 with the second folded antenna 24 connected to the second wiring 26. It is arranged so as to overlap with the far end side farthest from the near end side (near end side) in a plan view. Then, on the near end side of the second parallel line portion (not shown) of the second folded antenna 24, the first folded antenna is located at a position facing the second folded antenna 24 via the insulating substrate 2. 23 is not arranged.

なお、上記のように第２の実施形態の第１の折り返しアンテナ２３の配置位置は第１の実施形態の第１の折り返しアンテナ３の配置位置とは異なるものの、第１の折り返しアンテナ２３の６本の第１の平行線路部のそれぞれが、第２の折り返しアンテナ２４の５本の第２の平行線路部の全部と平面視で重なる点では第１の実施形態と同一であり、それらが重なる面積もほぼ同じであり、それらの電気特性もほぼ同一となる。 As described above, although the arrangement position of the first folding antenna 23 of the second embodiment is different from the arrangement position of the first folding antenna 3 of the first embodiment, the arrangement position of the first folding antenna 23 is 6 Each of the first parallel line portions of the book is the same as the first embodiment in that it overlaps with all of the five second parallel line portions of the second folded antenna 24 in a plan view, and they overlap. The areas are almost the same, and their electrical characteristics are also almost the same.

１、２１ アンテナ装置
２、１２、２２ 絶縁性基板
２ａ 第１の面
２ｂ 第２の面
３、３ａ、３ｂ、２３ 第１の折り返しアンテナ
３ｎ、３−１、３−２、３−３、３−４、３−５、３−６ 第１の平行線路部
４、４ａ、４ｂ、２４ 第２の折り返しアンテナ
４ｎ、４−１、４−２、４−３、４−４、４−５ 第２の平行線路部
５、２５ 第１の配線
６、２６ 第２の配線
７、２７ ビアホール
９、２９ 給電部
１１ 半田層 1, 21 Antenna device 2, 12, 22 Insulating substrate 2a First surface 2b Second surface 3, 3a, 3b, 23 First folded antenna 3n, 3-1, 3-2, 3-3, 3 -4, 3-5, 3-6 First parallel line section 4, 4a, 4b, 24 Second folded antenna 4n, 4-1, 4-2, 4-3, 4-4, 4-5 First 2 parallel line part 5, 25 1st wiring 6, 26 2nd wiring 7, 27 Via hole 9, 29 Feeding part 11 Solder layer

Claims (5)

絶縁性基板と、
前記絶縁性基板の第１の面に配置された、第１の折り返しアンテナ、第１の配線、及び給電部と、
前記絶縁性基板の前記第１の面と対向する第２の面に配置された、第２の折り返しアンテナ、及び第２の配線と、
前記絶縁性基板の前記第１の面から前記第２の面に渡って貫通するビアホールと、を備え、
前記第１の折り返しアンテナは前記給電部を介して前記第１の配線と接続され、前記第２の折り返しアンテナは前記第２の配線と接続され、前記第１の配線は前記ビアホールを介して前記第２の配線と接続され、
前記第１の折り返しアンテナは、少なくとも２本の互いに平行な第１の平行線路部を有し、前記第２の折り返しアンテナは、少なくとも２本の互いに平行な第２の平行線路部を有し、前記第１の平行線路部のそれぞれは、前記第２の平行線路部の全部と前記絶縁性基板を挟んで互いに対向するように平面視で交差する、
アンテナ装置。 Insulating board and
A first folded antenna, a first wiring, and a feeding portion arranged on the first surface of the insulating substrate.
A second folded antenna and a second wiring arranged on a second surface facing the first surface of the insulating substrate.
A via hole penetrating from the first surface to the second surface of the insulating substrate is provided.
The first folded antenna is connected to the first wiring via the feeding portion, the second folded antenna is connected to the second wiring, and the first wiring is connected to the via hole. Connected to the second wire,
The first folded antenna has at least two parallel first parallel lines, and the second folded antenna has at least two parallel second parallel lines. Each of the first parallel line portions intersects with all of the second parallel line portions in a plan view so as to face each other with the insulating substrate interposed therebetween.
Antenna device. 前記第１の折り返しアンテナの前記第１の平行線路部のそれぞれは、前記第２の折り返しアンテナの前記第２の平行線路部の全部と平面視で直交する、
請求項１に記載のアンテナ装置。 Each of the first parallel line portions of the first folded antenna is orthogonal to all of the second parallel line portions of the second folded antenna in a plan view.
The antenna device according to claim 1. 前記第１の折り返しアンテナ及び前記第２の折り返しアンテナは、いずれもミアンダ形状を有する、請求項１又は２に記載のアンテナ装置。 The antenna device according to claim 1 or 2, wherein the first folded antenna and the second folded antenna both have a meander shape. 前記第１の折り返しアンテナ及び前記第２の折り返しアンテナは、互いに相似形であり、平面視で互いに９０度回転して配置されてなる、請求項３に記載のアンテナ装置。 The antenna device according to claim 3, wherein the first folded antenna and the second folded antenna are similar to each other and are arranged so as to be rotated 90 degrees from each other in a plan view. 前記第１の折り返しアンテナの前記第１の平行線路部のうち、前記給電部に最も近い第１の平行線路部は、前記第２の折り返しアンテナの前記第２の平行線路部の全部のそれぞれの一端部と、前記絶縁性基板を挟んで互いに対向する、請求項１から４までのいずれか１項に記載のアンテナ装置。Among the first parallel line portions of the first folded antenna, the first parallel line portion closest to the feeding portion is each of all of the second parallel line portions of the second folded antenna. The antenna device according to any one of claims 1 to 4, wherein one end thereof and the insulating substrate face each other with the insulating substrate interposed therebetween.
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