JP7115885B2 - resonant circuit, antenna device - Google Patents

resonant circuit, antenna device Download PDF

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JP7115885B2
JP7115885B2 JP2018067893A JP2018067893A JP7115885B2 JP 7115885 B2 JP7115885 B2 JP 7115885B2 JP 2018067893 A JP2018067893 A JP 2018067893A JP 2018067893 A JP2018067893 A JP 2018067893A JP 7115885 B2 JP7115885 B2 JP 7115885B2
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resonance
circuit
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antenna
capacitor
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JP2019180007A (en
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仁 加賀谷
駿 梅津
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Toppan Forms Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • Theoretical Computer Science (AREA)
  • Aerials With Secondary Devices (AREA)
  • Details Of Aerials (AREA)

Description

本発明は、共振回路およびそれを備えたアンテナ装置に関する。 The present invention relates to a resonant circuit and an antenna device having the same.

ＩＣタグやＩＣラベル等の非接触型データ受送信体は、例えば、製品の製造管理、製品の流通管理等に用いられる。
非接触型データ受送信体は、共振周波数に応じてアンテナの長さが設定される。しかしながら、アンテナが長くなり過ぎると、非接触型データ受送信体の設置場所が制限されることがあるため、共振周波数を変えることなく、アンテナを小型化することが望まれている。 Noncontact data receivers and transmitters such as IC tags and IC labels are used, for example, for product manufacturing management, product distribution management, and the like.
The length of the antenna of the contactless data receiver/transmitter is set according to the resonance frequency. However, if the antenna is too long, the installation location of the contactless data transmitter/receiver may be limited, so it is desired to reduce the size of the antenna without changing the resonance frequency.

小型化が可能な非接触型データ受送信体用途のアンテナとしては、例えば、アンテナ共振波長の２分の１波長よりも短い実効長のダイポール部と、ダイポール部の中央に設けられた給電部と、ダイポール部に、タグアンテナのアドミッタンスの虚部がチップのアドミッタンスの虚部と同等の絶対値を持つように、タグアンテナのアドミッタンスを調整する長さを持ったインダクタンス部とを有するタグアンテナが知られている（例えば、特許文献１参照）。 An antenna for a contactless data receiver/transmitter that can be miniaturized includes, for example, a dipole section with an effective length shorter than half the wavelength of the antenna resonance wavelength, and a feeding section provided in the center of the dipole section. and an inductance part having a length in the dipole part for adjusting the admittance of the tag antenna so that the imaginary part of the admittance of the tag antenna has the same absolute value as the imaginary part of the admittance of the chip. (See Patent Document 1, for example).

また、小型化が可能な非接触型データ受送信体用途のアンテナとしては、例えば、動作周波数帯域の中で最大の周波数において、アンテナ共振波長の２分の１よりも短い実効長を有するダイポール部と、ダイポール部の中央に設けられた給電部と、給電部を中心に囲むように形成され、かつ両端がダイポール部に接続されているインダクタンス部と、ダイポール部の両端に、ダイポール部の線路幅より広い領域を設けた端部とを有するタグアンテナが知られている（例えば、特許文献２参照）。 In addition, as an antenna for a non-contact data transmitter/receiver that can be miniaturized, for example, a dipole part having an effective length shorter than half the antenna resonance wavelength at the maximum frequency in the operating frequency band and a feeding portion provided in the center of the dipole portion, an inductance portion formed so as to surround the feeding portion at the center and having both ends connected to the dipole portion, and a line width of the dipole portion at both ends of the dipole portion A tag antenna having an end with a wider area is known (see, for example, Patent Document 2).

また、小型化が可能な非接触型データ受送信体用途のアンテナとしては、例えば、導体で形成され、かつ動作周波数帯域の中で最大の周波数において、アンテナ共振波長の１／６～３／８の実効長を有するダイポール部と、ダイポール部の中央に設けられた給電部と、給電部を中心に囲むように形成され、かつ両端がダイポール部に接続され、タグアンテナのアドミッタンスの虚部がチップのアドミッタンスの虚部と同等の絶対値を持つように、タグアンテナのアドミッタンスを調整する長さを持ち、かつチップのキャパシタンス成分と共振するインダクタンス部を設け、ダイポール部の放射抵抗が、ダイポール部の導体による損失によって、チップの抵抗と同程度となるようにするタグアンテナが知られている（例えば、特許文献３参照）。 In addition, as an antenna for a non-contact type data receiving/transmitting device that can be miniaturized, for example, it is formed of a conductor and has a frequency of 1/6 to 3/8 of the antenna resonance wavelength at the maximum frequency in the operating frequency band. a dipole part having an effective length of , a feeding part provided in the center of the dipole part, a feeding part formed so as to surround the feeding part at the center, and both ends being connected to the dipole part, and the imaginary part of the admittance of the tag antenna being a chip In order to have an absolute value equivalent to the imaginary part of the admittance of A tag antenna is known in which the loss due to the conductor is made to be about the same as the resistance of the chip (see, for example, Patent Document 3).

特開２０１１－１０９６９８号公報JP 2011-109698 A 特許第４３３０５７５号公報Japanese Patent No. 4330575 特許第４７００１０１号公報Japanese Patent No. 4700101

しかしながら、特許文献１～３では、アンテナの小型化が可能であるものの、アンテナの共振周波数の極大値が、目的とする周波数よりも低周波数側にシフトしてしまい、目的とする周波数特性が得られないという課題があった。 However, in Patent Documents 1 to 3, although it is possible to reduce the size of the antenna, the maximum value of the resonance frequency of the antenna shifts to the lower frequency side than the target frequency, and the target frequency characteristics are obtained. There was a problem that it could not be

本発明は、上記事情に鑑みてなされたものであって、アンテナの小型化を可能とするとともに、目的とする周波数特性が得られる共振回路およびそれを備えたアンテナ装置を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resonant circuit capable of reducing the size of an antenna and obtaining desired frequency characteristics, and an antenna apparatus having the same. do.

本発明の共振回路は、ループ状をなす回路線からなる共振部と、ＩＣチップに電気的に接続される給電部と、前記共振部と前記給電部の間に介在する平面視櫛歯状をなすコンデンサ部と、を備えた共振回路であって、前記共振部は、前記回路線によって形成されるループの内側の領域α内に延在する折り返し部を有し、前記給電部および前記コンデンサ部は、前記領域α内に配置されたことを特徴とする。 The resonant circuit of the present invention includes a resonant portion formed of a looped circuit line, a power supply portion electrically connected to an IC chip, and a comb-like shape in plan view interposed between the resonant portion and the power supply portion. and a capacitor section, wherein the resonance section has a folded section extending within an area α inside a loop formed by the circuit line, and the power supply section and the capacitor section is arranged within the region α.

本発明のアンテナ装置は、本発明の共振回路と、該共振回路と非接触で電磁結合するブースターアンテナと、を備えたことを特徴とする。 An antenna device of the present invention is characterized by comprising the resonant circuit of the present invention and a booster antenna that electromagnetically couples with the resonant circuit in a non-contact manner.

本発明によれば、アンテナの小型化を可能とするとともに、目的とする周波数特性が得られる共振回路およびそれを備えたアンテナ装置を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, while enabling a size reduction of an antenna, the resonant circuit which can obtain the target frequency characteristic, and an antenna apparatus provided with the same can be provided.

本発明の実施形態による共振回路の要部構成を示す平面図である。1 is a plan view showing a configuration of a main part of a resonance circuit according to an embodiment of the invention; FIG. 本発明の実施形態によるアンテナ装置の要部構成を示す平面図である。1 is a plan view showing the main configuration of an antenna device according to an embodiment of the present invention; FIG. 実験例における非接触型データ受送信体の特性を示すグラフである。4 is a graph showing characteristics of a contactless data transmitter/receiver in an experimental example;

本発明の共振回路およびそれを備えたアンテナ装置の実施の形態について説明する。
なお、本実施の形態は、発明の趣旨をより良く理解させるために具体的に説明するものであり、特に指定のない限り、本発明を限定するものではない。また、以下で参照する図面においては、理解を容易にするために、必要に応じて各部材の寸法を適宜変えて図示している。 Embodiments of a resonance circuit of the present invention and an antenna device including the same will be described.
It should be noted that the present embodiment is specifically described for better understanding of the gist of the invention, and does not limit the invention unless otherwise specified. In addition, in the drawings referred to below, the dimensions of each member are appropriately changed as necessary to facilitate understanding.

［共振回路］
図１は、本発明の実施形態による共振回路の要部構成を示す平面図である。
図１に示す通り、本実施形態の共振回路１０は、共振部２０と、給電部３０と、コンデンサ部４０とから概略構成されている。 [Resonant circuit]
FIG. 1 is a plan view showing the essential configuration of a resonance circuit according to an embodiment of the present invention.
As shown in FIG. 1, the resonance circuit 10 of this embodiment is roughly configured from a resonance section 20, a power supply section 30, and a capacitor section 40. As shown in FIG.

共振部２０は、共振回路１０を非接触型データ受送信体に用いる場合、他のアンテナと電気的な接続（電磁界結合、すなわち、電界結合および／または磁界結合）をするためのものである。
共振回路１０において、共振部２０は、給電部３０およびコンデンサ部４０を除く、回路線２１からなる。共振部２０は、例えば、図１に示すように、平面視四角形状をなし、かつループ状をなす回路線２１からなる。
また、共振部２０は、回路線２１によって形成されるループの内側の領域α内に延在する折り返し部２２，２３，２４，２５を有する。 When the resonance circuit 10 is used in a contactless data transmitter/receiver, the resonance section 20 is for electrical connection (electromagnetic field coupling, that is, electric field coupling and/or magnetic field coupling) with another antenna. .
In the resonance circuit 10 , the resonance section 20 is composed of the circuit line 21 excluding the feeding section 30 and the capacitor section 40 . For example, as shown in FIG. 1, the resonance section 20 is composed of a circuit line 21 that has a square shape in a plan view and a loop shape.
The resonance section 20 also has folded sections 22 , 23 , 24 and 25 extending within the region α inside the loop formed by the circuit line 21 .

なお、ループの内側の領域αとは、コンデンサ部４０を除くループの主要部によって形成される枠の輪郭の内側の領域である。また、ループの内側の領域αとは、折り返し部２２，２３，２４，２５を設けない場合に、折り返し部２２，２３，２４，２５に相当する回路線２１を延長して繋がる仮想線によって形成されるループの内側の領域のことである。 The area α inside the loop is an area inside the contour of the frame formed by the main portion of the loop excluding the capacitor portion 40 . In addition, the region α inside the loop is formed by an imaginary line that extends and connects the circuit line 21 corresponding to the folded portions 22, 23, 24, and 25 when the folded portions 22, 23, 24, and 25 are not provided. The area inside the loop that is

本実施形態では、折り返し部２２，２３，２４，２５は、回路線２１によって形成される四角形の各角を基点として、回路線２１がループの内側の領域α内に延在することによって形成されている。詳細には、折り返し部２２，２３，２４，２５は、回路線２１によって形成される四角形の各角が、四角形の対角線方向に沿って領域α内に押し込まれ、平行する２本の回路線２１が領域α内で曲線状（半円形状）の回路線２１で連接されたような形状をなしている。 In the present embodiment, the folded portions 22, 23, 24, and 25 are formed by extending the circuit line 21 into the region α inside the loop with each corner of the square formed by the circuit line 21 as a base point. ing. Specifically, the folded portions 22 , 23 , 24 , 25 are arranged such that each corner of the square formed by the circuit lines 21 is pushed into the area α along the diagonal direction of the square so that the two parallel circuit lines 21 are folded. are connected by a curved (semicircular) circuit line 21 within the region α.

なお、本実施形態では、折り返し部２２，２３，２４，２５が、回路線２１によって形成される四角形の対角線方向に沿って形成されている場合を例示したが、本発明はこれに限定されない。本発明にあっては、例えば、折り返し部が、回路線によって形成される四角形の各辺の中央部が、四角形の一辺に沿って領域α内に押し込まれ、平行する２本の回路線が領域αで連接されたような形状をなしていてもよい。また、折り返し部を形成する位置や、折り返し部の数は特に限定されず、共振部２０の共振周波数に応じて、適宜調整される。 In this embodiment, the folded portions 22, 23, 24, and 25 are formed along the diagonal direction of the square formed by the circuit line 21, but the present invention is not limited to this. In the present invention, for example, the folded portion is such that the central portion of each side of a quadrangle formed by the circuit lines is pushed into the area α along one side of the quadrangle, and two parallel circuit lines It may have a shape that is connected at α. Further, the position of forming the folded portion and the number of folded portions are not particularly limited, and are appropriately adjusted according to the resonance frequency of the resonance portion 20 .

共振部２０の長さと折り返し部２２，２３，２４，２５の長さの和は、特に限定されず、共振部２０の共振周波数に応じて、適宜調整される。共振部２０の長さと折り返し部２２，２３，２４，２５の長さの和は、例えば、周波数９２０ＭＨｚの１／２波長、１／３波長、１／４波長に相当する長さである。
また、回路線２１の幅は、使用する部材の比誘電率に合せて調整することにより、共振回路１０の周波数特性を調整することができる。 The sum of the length of the resonance section 20 and the lengths of the folded sections 22 , 23 , 24 and 25 is not particularly limited, and is adjusted appropriately according to the resonance frequency of the resonance section 20 . The sum of the length of the resonator 20 and the lengths of the folded portions 22, 23, 24, and 25 corresponds to, for example, 1/2 wavelength, 1/3 wavelength, and 1/4 wavelength of the frequency of 920 MHz.
Further, the frequency characteristic of the resonance circuit 10 can be adjusted by adjusting the width of the circuit line 21 according to the dielectric constant of the material used.

給電部３０は、共振回路１０を非接触型データ受送信体に用いる場合、ＩＣチップと電気的に接続される。すなわち、共振回路１０を非接触型データ受送信体に用いる場合、給電部３０にＩＣチップが実装される。
また、給電部３０は、図１に示すように、領域α内に配置される。
さらに、給電部３０は、回路線２１によって形成される四角形の一辺２１Ａと垂直方向に延在するように配設されている。 The power supply unit 30 is electrically connected to the IC chip when the resonance circuit 10 is used as a non-contact data transmitter/receiver. That is, when the resonant circuit 10 is used as a non-contact data transmitter/receiver, an IC chip is mounted on the power supply section 30 .
Further, the power supply unit 30 is arranged within the area α as shown in FIG. 1 .
Further, the power feeding portion 30 is arranged so as to extend in a direction perpendicular to one side 21A of the square formed by the circuit line 21 .

コンデンサ部４０は、共振回路１０を非接触型データ受送信体に用いる場合、共振部２０と他のアンテナの電気的な接続を可能とするために、共振周波数を所定の範囲に調整するためのものである。
また、コンデンサ部４０は、図１に示すように、領域α内に配置される。さらに、コンデンサ部４０は、共振部２０および給電部３０と同一面上にあり、共振部２０と給電部３０の間に介在している。より詳細には、コンデンサ部４０は、共振部２０と給電部３０の連接点２８において、給電部３０と分岐して、給電部３０よりも外側（回路線２１によって形成されるループ側）に配置されている。 When the resonance circuit 10 is used as a non-contact data transmitter/receiver, the capacitor section 40 is used to adjust the resonance frequency within a predetermined range in order to enable electrical connection between the resonance section 20 and another antenna. It is.
Further, the capacitor section 40 is arranged within the area α, as shown in FIG. Furthermore, the capacitor section 40 is on the same plane as the resonance section 20 and the power feeding section 30 and is interposed between the resonance section 20 and the power feeding section 30 . More specifically, the capacitor section 40 branches off from the power supply section 30 at the connecting point 28 between the resonance section 20 and the power supply section 30 and is arranged outside the power supply section 30 (on the side of the loop formed by the circuit line 21). It is

コンデンサ部４０は、図１に示すように、平面視櫛歯状をなしている。
コンデンサ部４０は、上記の四角形の一辺２１Ａと垂直方向に延在するように配設された主線部４１と、主線部４１を基端とし、上記の四角形の一辺２１Ａと平行方向に延在するように配設された櫛歯部４２，４３と、を有する。櫛歯部４２と櫛歯部４３は、所定の間隔を置いて、配設されている。また、コンデンサ部４０は、主線部４１Ａおよび櫛歯部４２Ａ，４３Ａを有する第１の部位４７と、主線部４１Ｂおよび櫛歯部４２Ｂ，４３Ｂを有する第２の部位４８と、を有する。これら第１の部位４７と第２の部位４８は一対をなしている。さらに、コンデンサ部４０では、領域αの中心部側から上記の四角形の一辺２１Ａへ向かって順に、櫛歯部４２Ａ、櫛歯部４２Ｂ、櫛歯部４３Ａおよび櫛歯部４３Ｂがこの順に並列するように、第１の部位４７と第２の部位４８が配設されている。 As shown in FIG. 1, the capacitor section 40 has a comb shape in plan view.
The capacitor portion 40 has a main line portion 41 arranged so as to extend in a direction perpendicular to the side 21A of the quadrangle, and the main line portion 41 as a base end and extends in a direction parallel to the side 21A of the quadrangle. and comb tooth portions 42 and 43 arranged as follows. The comb tooth portion 42 and the comb tooth portion 43 are arranged at a predetermined interval. The capacitor portion 40 also has a first portion 47 having a main line portion 41A and comb tooth portions 42A and 43A, and a second portion 48 having a main line portion 41B and comb tooth portions 42B and 43B. The first portion 47 and the second portion 48 form a pair. Furthermore, in the capacitor section 40, the comb tooth portion 42A, the comb tooth portion 42B, the comb tooth portion 43A, and the comb tooth portion 43B are arranged in parallel in this order from the center side of the region α toward the square side 21A. A first portion 47 and a second portion 48 are arranged in the .

なお、本実施形態では、コンデンサ部４０が、櫛歯部４２Ａ，４３Ａを有する第１の部位４７と、櫛歯部４２Ｂ，４３Ｂを有する第２の部位４８と、を有する場合を例示したが、本発明はこれに限定されない。本発明にあっては、コンデンサ部を構成する櫛歯部の数が、共振部の共振周波数に応じて適宜調整される。また、コンデンサ部を構成する櫛歯部の大きさも、共振部の共振周波数に応じて適宜調整される。 In this embodiment, the case where the capacitor section 40 has the first portion 47 having the comb tooth portions 42A and 43A and the second portion 48 having the comb tooth portions 42B and 43B is exemplified. The invention is not limited to this. In the present invention, the number of comb tooth portions forming the capacitor portion is appropriately adjusted according to the resonance frequency of the resonance portion. In addition, the size of the comb tooth portion forming the capacitor portion is also appropriately adjusted according to the resonance frequency of the resonance portion.

本実施形態の共振回路１０は、図１に示すように、基材５０の一面５０ａに設けられていてもよい。基材の有無は、共振回路１０を適用する対象物に応じて適宜選択される。 The resonance circuit 10 of the present embodiment may be provided on one surface 50a of the substrate 50, as shown in FIG. The presence or absence of the base material is appropriately selected according to the object to which the resonant circuit 10 is applied.

共振部２０、給電部３０およびコンデンサ部４０を構成する材料としては、例えば、公知のポリマー型導電インク、銀インク組成物等の導電性のインク、金属箔、電気メッキや静電メッキにより形成された金属薄膜、金属蒸着等の各種薄膜形成法により形成された金属薄膜、金属板等が挙げられる。 Examples of materials that constitute the resonance unit 20, the power supply unit 30, and the capacitor unit 40 include conductive inks such as known polymer-type conductive inks and silver ink compositions, metal foils, and electroplating or electrostatic plating. metal thin films, metal thin films formed by various thin film forming methods such as metal vapor deposition, and metal plates.

基材５０としては、例えば、ポリエチレンテレフタレート（ＰＥＴ）からなる基材、ポリイミドからなる基材、ガラス繊維の布にエポキシ樹脂を染み込ませて熱硬化処理を施し板状にした基材（Ｆｌａｍｅ Ｒｅｔａｒｄａｎｔ Ｔｙｐｅ ４、ＦＲ－４）等が挙げられる。ＦＲ－４としては、具体的には、パナソニック社製のＲ－１７００（商品名）等が挙げられる。 Examples of the base material 50 include a base material made of polyethylene terephthalate (PET), a base material made of polyimide, and a base material (Flame Retardant Type) made by impregnating an epoxy resin into glass fiber cloth and applying heat curing treatment to form a plate. 4, FR-4) and the like. Specific examples of FR-4 include R-1700 (trade name) manufactured by Panasonic Corporation.

また、本実施形態の共振回路１０は、給電部３０に実装されるＩＣチップを備えていてもよい。
ＩＣチップは、外部から非接触で共振回路１０を介して供給される電力によって動作し、外部との間で共振回路１０を介した無線通信を行って非接触状態でデータの書き込み及び読み出しを行う半導体集積回路である。このＩＣチップとしては、特に限定されず、共振回路１０を介して非接触状態でデータの書き込みおよび読み出しが可能なものであれば、任意のものを用いることができる。 Moreover, the resonance circuit 10 of the present embodiment may include an IC chip mounted on the power supply section 30 .
The IC chip operates by power supplied from the outside through the resonance circuit 10 in a contactless manner, performs wireless communication with the outside through the resonance circuit 10, and writes and reads data in a contactless state. It is a semiconductor integrated circuit. The IC chip is not particularly limited, and any IC chip can be used as long as data can be written and read in a non-contact state via the resonance circuit 10 .

本実施形態の共振回路１０は、ループ状をなす回路線２１からなる共振部２０と、ＩＣチップに電気的に接続される給電部３０と、共振部２０と給電部３０の間に介在する平面視櫛歯状をなすコンデンサ部４０と、を備え、共振部２０は、回路線２１によって形成されるループの内側の領域α内に延在する折り返し部２２，２３，２４，２５を有し、給電部３０およびコンデンサ部４０は、領域α内に配置されるため、非接触型データ受送信体に用いた場合に、アンテナとなる共振部２０の小型化を可能とするとともに、目的とする周波数特性が得られる。 The resonance circuit 10 of the present embodiment includes a resonance section 20 composed of a loop-shaped circuit line 21, a power supply section 30 electrically connected to an IC chip, and a plane interposed between the resonance section 20 and the power supply section 30. a capacitor portion 40 having a comb-like shape when viewed, the resonance portion 20 having folded portions 22, 23, 24, and 25 extending within a region α inside a loop formed by the circuit line 21; Since the power supply unit 30 and the capacitor unit 40 are arranged in the region α, when used in a contactless data receiving/transmitting device, it is possible to reduce the size of the resonance unit 20 that functions as an antenna, and to achieve the desired frequency. properties are obtained.

［アンテナ装置］
図２は、本発明の実施形態によるアンテナ装置の要部構成を示す平面図である。
図２に示す通り、本実施形態のアンテナ装置１００は、本実施形態の共振回路１０と、共振回路１０と非接触で電磁界結合するブースターアンテナ１１０とから概略構成されている。 [Antenna device]
FIG. 2 is a plan view showing the essential configuration of the antenna device according to the embodiment of the present invention.
As shown in FIG. 2, the antenna device 100 of this embodiment is roughly configured from the resonance circuit 10 of this embodiment and a booster antenna 110 that electromagnetically couples with the resonance circuit 10 in a non-contact manner.

ブースターアンテナ１１０は、中央部１１０Ａと、中央部１１０Ａに連接し、中央部１１０Ａから紙面の左右方向にそれぞれ沿在する直線状の放射部１１０Ｂ，１１０Ｂとから構成されている。ブースターアンテナ１１０は、共振回路１０の共振部２０に沿うように、かつ互いに９０度の角度をなすように中央部１１０Ａが折り曲げられている。言い換えれば、平面視四角形状をなす共振部２０に沿って配置されるブースターアンテナ１１０の中央部１１０Ａは、平面視コ字状をなしている。 The booster antenna 110 is composed of a central portion 110A and linear radiating portions 110B and 110B that are contiguous with the central portion 110A and extend from the central portion 110A in the horizontal direction of the drawing. The booster antenna 110 has a center portion 110A that is bent along the resonance portion 20 of the resonance circuit 10 and at an angle of 90 degrees to each other. In other words, the central portion 110A of the booster antenna 110 arranged along the resonant portion 20 having a square shape in plan view has a U shape in plan view.

また、ブースターアンテナ１１０の中央部１１０Ａは、ブースターアンテナ１１０の長手方向（紙面左右方向）の中央に配置され、ブースターアンテナ１１０の長手方向と平行な第１の直線部１１１と、第１の直線部１１１に連接し、第１の直線部１１１と垂直（ブースターアンテナ１１０の長手方向と垂直）な第２の直線部１１２，１１２とから構成されている。
さらに、ブースターアンテナ１１０は、中央部１１０Ａの中央を通り、ブースターアンテナ１１０の長手方向に対して垂直な直線（中心線）を基準として線対称（紙面左右方向に線対称）となっている。 In addition, the central portion 110A of the booster antenna 110 is arranged in the center of the longitudinal direction of the booster antenna 110 (horizontal direction on the paper surface), and the first linear portion 111 parallel to the longitudinal direction of the booster antenna 110 and the first linear portion 111 and is composed of second straight portions 112, 112 perpendicular to the first straight portion 111 (perpendicular to the longitudinal direction of the booster antenna 110).
Furthermore, the booster antenna 110 is line symmetrical (line symmetrical in the lateral direction of the drawing) with respect to a straight line (center line) passing through the center of the central portion 110A and perpendicular to the longitudinal direction of the booster antenna 110 .

また、ブースターアンテナ１１０の第１の直線部１１１にコンデンサ部４０が近接するように、共振回路１０が配置されている。 Also, the resonance circuit 10 is arranged so that the capacitor section 40 is close to the first linear section 111 of the booster antenna 110 .

ブースターアンテナ１１０と共振回路１０の共振部２０の間隔は、特に限定されず、ブースターアンテナ１１０と共振部２０とがと非接触で電磁界結合するように適宜調整される。 The distance between the booster antenna 110 and the resonance section 20 of the resonance circuit 10 is not particularly limited, and is appropriately adjusted so that the booster antenna 110 and the resonance section 20 are electromagnetically coupled without contact.

ブースターアンテナ１１０は、ＲＦＩＤ（Ｒａｄｉｏ Ｆｒｅｑｕｅｎｃｙ ＩＤｅｎｔｉｆｉｃａｔｉｏｎ）で使用されるＵＨＦ帯やマイクロ波帯の電波帯の周波数（３００ＭＨｚ～３０ＧＨｚ）の１／２波長に相当する長さとなっている。つまり、共振回路１０の給電部３０に実装されるＩＣチップを中心とする２つの領域に放射部１１０Ｂ，１１０Ｂを区分した場合、それぞれの長手方向における長さは、１／４波長に相当する長さとなっている。 The booster antenna 110 has a length corresponding to a half wavelength of the frequency (300 MHz to 30 GHz) of the UHF band or microwave band used in RFID (Radio Frequency Identification). That is, when the radiating sections 110B and 110B are divided into two regions around the IC chip mounted on the feeding section 30 of the resonant circuit 10, the length in the longitudinal direction of each region is equivalent to a quarter wavelength. It is

ブースターアンテナ１１０を構成する材料としては、共振部２０、給電部３０およびコンデンサ部４０を構成する材料と同様のものが用いられるが、導電性を有した異なる材質でもよい。 As a material for constructing the booster antenna 110, the same materials as those for constructing the resonance section 20, the feeding section 30, and the capacitor section 40 are used, but a different conductive material may be used.

本実施形態のアンテナ装置１００は、本実施形態の共振回路１０と、共振回路１０と非接触で電磁界結合するブースターアンテナ１１０とを備えているため、非接触型データ受送信体に用いた場合に、目的とする周波数特性が得られる。 Since the antenna device 100 of this embodiment includes the resonance circuit 10 of this embodiment and the booster antenna 110 that electromagnetically couples with the resonance circuit 10 in a non-contact manner, the antenna device 100 is used in a non-contact data transmitter/receiver. , the desired frequency characteristics can be obtained.

以下、実施例により本発明をさらに具体的に説明するが、本発明は以下の実施例に限定されるものではない。 EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to the following examples.

［実験例１］
図２に示すアンテナ装置の共振回路にＩＣチップを実装し、実験例１の非接触型データ受送信体を作製した。
また、ブースターアンテナの放射部の長さを５０ｍｍとした。 [Experimental example 1]
An IC chip was mounted on the resonance circuit of the antenna device shown in FIG.
Also, the length of the radiation portion of the booster antenna was set to 50 mm.

非接触型データ受送信体を金属板上に配置し、情報読出／書込装置（商品名：Ｔａｇ Ｆｏｒｍａｎｃｅｌｉｔｅ、Ｖｏｙａｎｔｉｃ社製）を用いて、それぞれの非接触型データ受送信体の通信特性（通信距離、共振周波数帯域）を評価した。なお、通信距離を測定するに当たり、情報読出／書込装置の出力を一定とした。結果を図３に示す。 A contactless data transmitter/receiver is placed on a metal plate, and an information read/write device (trade name: Tag Formancelite, manufactured by Voyantic) is used to measure the communication characteristics (communication distance, resonance frequency band) were evaluated. In measuring the communication distance, the output of the information reading/writing device was kept constant. The results are shown in FIG.

［実験例２］
共振回路に、共振部の折り返し部とコンデンサ部を設けなかったこと以外は実験例１と同様にして、実験例２の非接触型データ受送信体を作製した。
実験例２の非接触型データ受送信体について、実験例１と同様にして、通信特性（通信距離、共振周波数帯域）を評価した。結果を図３に示す。 [Experimental example 2]
A non-contact data transmitter/receiver of Experimental Example 2 was fabricated in the same manner as in Experimental Example 1, except that the resonant circuit did not have the folded portion of the resonant portion and the capacitor portion.
The communication characteristics (communication distance, resonance frequency band) of the contactless data transmitter/receiver of Experimental Example 2 were evaluated in the same manner as in Experimental Example 1. FIG. The results are shown in FIG.

［実験例３］
共振回路にコンデンサ部を設けなかったこと以外は実験例１と同様にして、実験例３の非接触型データ受送信体を作製した。
実験例３の非接触型データ受送信体について、実験例１と同様にして、通信特性（通信距離、共振周波数帯域）を評価した。結果を図３に示す。 [Experimental example 3]
A contactless data transmitter/receiver of Experimental Example 3 was fabricated in the same manner as in Experimental Example 1, except that the capacitor portion was not provided in the resonance circuit.
The communication characteristics (communication distance, resonance frequency band) of the contactless data transmitter/receiver of Experimental Example 3 were evaluated in the same manner as in Experimental Example 1. The results are shown in FIG.

図３に示す結果から、共振回路に、共振部の折り返し部とコンデンサ部を設けることにより、非接触型データ受送信体の共振周波数帯域が高周波数側にシフトすることが確認された。 From the results shown in FIG. 3, it was confirmed that the resonant frequency band of the non-contact data transmitter/receiver was shifted to the high frequency side by providing the resonant circuit with the folded portion of the resonant portion and the capacitor portion.

１０・・・共振回路、２０・・・共振部、２１・・・回路線、２２，２３，２４，２５・・・折り返し部、２８・・・連接点、３０・・・給電部、４０・・・コンデンサ部、４１，４１Ａ，４１Ｂ・・・主線部、４２，４２Ａ，４２Ｂ，４３，４３Ａ，４３Ｂ・・・櫛歯部、４７・・・第１の部位、４８・・・第２の部位、５０・・・基材、１００・・・アンテナ装置、１１０・・・ブースターアンテナ、１１０Ａ・・・中央部、１１０Ｂ・・・放射部、１１１・・・第１の直線部、１１２・・・第２の直線部。 DESCRIPTION OF SYMBOLS 10... Resonance circuit 20... Resonance part 21... Circuit line 22, 23, 24, 25... Folding part 28... Connection point 30... Power supply part 40. Capacitor portion 41, 41A, 41B Main line portion 42, 42A, 42B, 43, 43A, 43B Comb tooth portion 47 First portion 48 Second Part 50 Base material 100 Antenna device 110 Booster antenna 110A Central portion 110B Radiation portion 111 First straight portion 112 - A second straight portion.

Claims (2)

ループ状をなす回路線からなる共振部と、ＩＣチップに電気的に接続される給電部と、前記共振部および前記給電部と同一面上にあり、前記共振部と前記給電部の間に介在する平面視櫛歯状をなすコンデンサ部と、を備えた共振回路であって、
前記共振部は、前記回路線によって形成されるループの内側の領域α内に延在する折り返し部を有し、
前記給電部および前記コンデンサ部は、前記領域α内に配置されたことを特徴とする共振回路。 a resonant portion formed of a looped circuit line; a power supply portion electrically connected to an IC chip ; A resonance circuit comprising a capacitor portion having a comb tooth shape in plan view,
The resonance section has a folded section extending within an area α inside a loop formed by the circuit line,
The resonance circuit, wherein the feeding section and the capacitor section are arranged within the region α. 請求項１に記載の共振回路と、該共振回路と非接触で電磁結合するブースターアンテナと、を備えたことを特徴とするアンテナ装置。 2. An antenna device comprising: the resonant circuit according to claim 1; and a booster antenna for non-contact electromagnetic coupling with the resonant circuit.
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