JPH03503467A - magnetic field concentrator - Google Patents
magnetic field concentratorInfo
- Publication number
- JPH03503467A JPH03503467A JP1501854A JP50185489A JPH03503467A JP H03503467 A JPH03503467 A JP H03503467A JP 1501854 A JP1501854 A JP 1501854A JP 50185489 A JP50185489 A JP 50185489A JP H03503467 A JPH03503467 A JP H03503467A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- region
- receiving means
- regions
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000004907 flux Effects 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 50
- 239000002184 metal Substances 0.000 claims description 50
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 241000283690 Bos taurus Species 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
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- 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
- H01Q7/04—Screened antennas
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 磁界集中装置 発明の分野 本発明は磁界集中装置、特に信号強調および／または開口内への磁束の封じ込め 、および／または構成部分からの磁束のシールド、および／または信号受信を向 上する手段に関するものである。本発明は特に証示物、トランスポンダまたは小 さいカード等の受動装置に適用される。[Detailed description of the invention] magnetic field concentrator field of invention The invention relates to a magnetic field concentrator, particularly for signal enhancement and/or confinement of magnetic flux within an aperture. , and/or to shield magnetic flux from components and/or to facilitate signal reception. It concerns the means to increase The invention is particularly suitable for exhibits, transponders or small This applies to passive devices such as small cards.
従来技術 磁界を受けるコイルの近傍に金属を置くとそのコイルの受ける磁界の量が実質上 小さくなることは公知されている。例えば、磁界の発生源とコイルとの間に金属 を置くと第１図に示すように磁界はコイルによって補集されなくなる。また金属 シートはドライバ・コイル（励磁コイル）または磁界源から放射される磁束を吸 収、偏向する作用をもつ。Conventional technology If you place a metal near a coil that receives a magnetic field, the amount of magnetic field that the coil receives will actually decrease. It is known that it becomes smaller. For example, if there is a metal between the source of the magnetic field and the coil, As shown in FIG. 1, the magnetic field is no longer collected by the coil. Also metal The sheet absorbs the magnetic flux radiated from the driver coil (excitation coil) or magnetic field source. It has the effect of focusing and deflecting.
第２図は金属シートが信号受信を低減する働きをなす別の状況を示している。こ の金属シートはコイルの背後に配されている。金属シートの作用は対向磁界を放 射することにより、コイルの受ける磁束の量を小さくすることである。金属シー トがコイルに近ければ近いほどそれだけ対向磁束は大きく、コイルの受ける信号 磁束は小さくなる。要するに金属シートはドライバ・コイルの放射する磁束を比 例的にゼロにする働きをなす。FIG. 2 shows another situation in which the metal sheet serves to reduce signal reception. child The metal sheet is placed behind the coil. The action of the metal sheet releases the opposing magnetic field. The idea is to reduce the amount of magnetic flux that the coil receives by radiating the magnetic flux. metal sea The closer the magnet is to the coil, the greater the opposing magnetic flux, and the greater the signal received by the coil. Magnetic flux becomes smaller. In short, the metal sheet absorbs the magnetic flux radiated by the driver coil. For example, it works to zero.
米国特許第４．３７３．１６３号にはアンテナ・ループを内蔵する静電シールド （第１図）が開示されている。このアンテナは金属シールドをその囲りに施され ている。しかしながら、この米国特許明細書には、本発明の、後述するような、 アンテナに近接してしかもそのアンテナと実質的な同一平面上に設けて信号受信 を強化する導電板が開示されていない。U.S. Patent No. 4.373.163 describes an electrostatic shield with an integrated antenna loop. (FIG. 1) is disclosed. This antenna has a metal shield around it. ing. However, this U.S. patent specifies that the present invention, as described below, Signal reception by installing close to the antenna and essentially on the same plane as the antenna A conductive plate for reinforcing this is not disclosed.
また米国特許第４．４８６．７３１号には、コイルに対して重なった関係で配設 した透磁性材料を有するコイルの形をした信号強調装置が開示されている。コイ ルは、そのコイルを衝突磁束（欄２、行２３〜４１）の方向と平行に向けると条 板２３．２４の影響を受ける。しかるにこの米国特許第４．４８６．７３１号は コイルが衝突磁束と同一の平面上にある時のコイルの受信の問題に関しているが 、本発明は、集中装置をコイルと並置してしかもそのコイルと実質上同一の平面 上に設けることによってコイルによる磁束の受容を増大させることに関している 。U.S. Pat. No. 4,486,731 also discloses that the A signal enhancement device in the form of a coil having a magnetically permeable material is disclosed. Koi If the coil is oriented parallel to the direction of the impinging magnetic flux (column 2, rows 23-41), Affected by plates 23 and 24. However, this U.S. Patent No. 4.486.731 Regarding the problem of coil reception when the coil is in the same plane as the impinging magnetic flux. , the present invention provides a method for placing the concentrator in juxtaposition with the coil and in substantially the same plane as the coil. Concerning increasing the reception of magnetic flux by the coil by providing .
また米国特許第４．７５４．２８４号には５０Ｍ）Ｉｚ以上の高周波帯域の信号 を受けるのに使用する自動車用アンテナ・システムが開示されている。In addition, US Patent No. 4.754.284 describes a signal in a high frequency band of 50 M) Iz or more. An automotive antenna system for use in receiving signals is disclosed.
発明の要約 本発明の目的は、信号または磁界を受けるコイルの能力に有害な影響を及ぼすこ となくコイルと組合わせるかもしくはコイルに並置することのできる集中装置を 提供することにある。Summary of the invention It is an object of the present invention to A concentration device that can be combined with the coil or juxtaposed with the coil. It is about providing.
本発明の別の目的は改良された集中装置性能を提供することにある。Another object of the invention is to provide improved concentrator performance.
本発明の１つの実施例による集中装置は、受信手段により受信されるように信号 を集中するものであって、上記受信手段に並置された導電部分を含んでおり、上 記の信号を受信し、かつ更なる信号を上記受信手段へ衝突させ、これにより上記 受信手段による受信を強化するように配向されている。A concentrating device according to one embodiment of the invention is configured to transmit a signal to be received by the receiving means. and includes a conductive part juxtaposed to the receiving means, and and impinging a further signal on the receiving means, thereby causing the above-mentioned oriented to enhance reception by the receiving means.
本発明は更に、導電部分を含んでおり、磁界を受は磁束を上記導電部分から放射 させるように配向されており、また上記磁界も受けるようになっている受信手段 に対し、上記受信手段が上記磁界に加えて上記磁束も受けるように並置されてい る磁界集中装置を提供する。The present invention further includes a conductive portion that receives a magnetic field and radiates magnetic flux from the conductive portion. a receiving means which is oriented so as to cause the magnetic field to be oriented so as to receive the magnetic field; In contrast, the receiving means is juxtaposed so as to receive the magnetic flux in addition to the magnetic field. The present invention provides a magnetic field concentrator.
上記導電部分は、好ましくはアルミまたは銅等の金属で作られる。The conductive part is preferably made of metal such as aluminum or copper.
本発明は更に、受信手段を囲むようになっていて、第１、第２の相互接続された 部分からなるループを含んだ磁界集中装置であって、 上記第１部分が第１、第２の領域を有し、２この第１部分は上記第１、第２領域 どうしの間において連続しており、第１領域は第２領域に並置されると共にその 第２領域から離間しており、この第１部分は上記受信手段を包囲するようになっ ており、 上記第２部分が第３、第４の領域を有しており、この第２部分も上記第３、第４ 領域どうしの間に連続しており、上記第３領域は上記第４領域に並置されると共 にその第４領域から離間しており、この第２部分は上記第１部分を実質的に取囲 んでおり、 また第」、第２の相互接続部分も設けられていて、その第１相互接続部分は上記 第１領域を第３領域へ接続するようになっており、第２相互接続部分の方は上記 第２領域と第４領域とを接続するようになっており、 上記ループは連続的に形成されており、また上記第１、第２の相互接続部分どう しの間に空間を有している、磁界集中装置を提供する。The invention further includes a first and a second interconnected device surrounding the receiving means. A magnetic field concentrator comprising a loop of parts, 2 the first portion has first and second regions; 2 the first portion has first and second regions; They are continuous, and the first area is juxtaposed to the second area and its The first portion is spaced apart from the second region, and the first portion surrounds the receiving means. and The second portion has third and fourth regions, and the second portion also has third and fourth regions. The regions are continuous, and the third region is juxtaposed to the fourth region. and is spaced apart from the fourth region, the second portion substantially surrounding the first portion. and A second interconnection portion is also provided, the first interconnection portion being The first area is connected to the third area, and the second interconnection part is as described above. It connects the second area and the fourth area, The loop is formed continuously and the first and second interconnection portions are connected to each other. To provide a magnetic field concentrating device having a space between the two magnetic fields.
上記集中装置は磁界の入射時には、上記第１、第２の部分どうしの間に実質上磁 界を移動させず、磁界を上記第１部分を通じて放散させ上記受信手段へ入射させ るようにすることもできる。When the magnetic field is applied to the concentrator, there is substantially no magnetic field between the first and second parts. The magnetic field is dissipated through the first portion and is incident on the receiving means without moving the field. You can also make it so that
本発明はまた、受信手段による磁界受容を強化するようになっており、上記受信 手段に並置されてこの受信手段に影響を及ぼすようになっている磁界集中装置で あって、１つの平面上で上記受信手段を実質的に包囲する金属部分を含んでおり 、この金属部分は更には上記平面上で不連続的に受信手段を取囲むようになって おり、こうして上記磁界による放射時に磁束を生じさせ、この磁束を上記の磁界 と共に上記受信手段により受けるようになっている磁界集中装置を提供する。The present invention is also adapted to enhance magnetic field reception by the receiving means, said receiving means a magnetic field concentrator juxtaposed to the means and adapted to influence said receiving means; and includes a metal portion substantially surrounding the receiving means on one plane. , this metal part further surrounds the receiving means discontinuously on the plane. In this way, magnetic flux is generated during radiation by the above magnetic field, and this magnetic flux is transferred to the above magnetic field. and a magnetic field concentrator adapted to be received by the receiving means.
本発明は、所定の部域内において磁界からの放射を軽減するシールドであって、 第１、第２の部分と、第３、第４の相互接続部分とを含むループからなり、 上記第１部分は第１、第２の領域を有し、その第１部分は上記第１、第２の領域 どうしの間で連続しており、上記第１領域は第２領域に実質上対向して並置され ると共にその第２領域から離間されており、この第１部分が上記所定部域を実質 上取囲んでおり、 上記第２部分は第３、第４領域を有し、これら第３、第４の領域は上記の第１、 第２の領域に対しそれぞれ整列されており、この第２部分は」１記第３、第４の 領域どうしの間において連続しており、第３領域が第４領域に実質上対向して並 置されると共にその第４領域から離間されており、この第３部分は上記第１部分 を実質上取囲んでおり、上記第１相互接続部分は上記第１、第４の領域を接続し 、また第２相互接続部分は上記第２、第３の領域を接続するようになっており、 こうして上記磁界を、第１部分を磁界とする部域から実質的に排除する、ように なっているシールドを提供プ“る。The present invention is a shield that reduces radiation from a magnetic field within a predetermined area, comprising: comprising a loop including first and second portions and third and fourth interconnection portions; The first portion has first and second regions, and the first portion has first and second regions. and the first region is substantially opposite and juxtaposed to the second region. and spaced apart from the second region, the first portion substantially covering the predetermined region. Surrounding the top, The second portion has third and fourth regions, and these third and fourth regions are the first and fourth regions. The second area is aligned with the second area, and this second area is aligned with the third and fourth areas of ``1. The regions are continuous, and the third region is arranged substantially opposite to the fourth region. and spaced apart from the fourth region, the third region being spaced apart from the first region. and the first interconnection portion connects the first and fourth regions. , and a second interconnection portion is configured to connect the second and third regions; In this way, the magnetic field is substantially excluded from the region where the first portion is the magnetic field. Provides a protective shield.
上記のシールドおよび集中装置の部分は本発明の１つの実施例においては実質的 にＣ″の形状を有するようにしてもよい。In one embodiment of the invention, the shield and concentrator portions described above are substantially It may also have a C'' shape.
本発明は更に、所定部域内からの磁界放射を実質上無くするシールドであって、 上記部域を実質上包囲する第１導電部分と、上記第１導電部分を実質上包囲する と共にこの第１導電部分から離間されている第２導電部分とを含んでおり、上記 第１、第２部分の端部領域どうしを重ね合わせて接続して１つの連続条板を形成 し、これにより、磁界による放射時に磁界を上記部域から実質上偏向させる、シ ールドを提供する。The invention further provides a shield that substantially eliminates magnetic field radiation from within a predetermined area, comprising: a first electrically conductive portion substantially surrounding the area; and a first electrically conductive portion substantially surrounding the first electrically conductive portion. and a second conductive portion spaced apart from the first conductive portion; The end regions of the first and second parts are overlapped and connected to form one continuous strip. This results in a system that substantially deflects the magnetic field away from the area when radiated by the magnetic field. provide the field.
本発明はまた、交番磁束を開口部間内に封じ込めかつ／またはコイルに磁束を集 中し、また／あるいは磁束から構成部分をシールドするのに使用できる磁界集中 装置も提供する。The present invention also provides for confining alternating magnetic flux within the apertures and/or concentrating the magnetic flux in the coil. magnetic field concentration that can be used to shield components from magnetic flux and/or We also provide equipment.
この集中装置は、磁束収集用の大型コイルが集中装置や小型コイルより高い価格 であったり、あるいはコイルのサイズに問題がある場合に有用である。集中装置 は導電性の良い材料で作るのが好ましく、導電性が良ければその集中装置の性能 も向上する。またその導電性によって、集中装置から放射される磁束の量が決ま る。非磁性もしくは磁性導体も使用できる。本発明に関する好まし７い具体例を 図面を参照しながら以下に説明する。This concentrator has large coils for magnetic flux collection which are more expensive than concentrators and small coils. This is useful when there is a problem with the size of the coil. concentration device is preferably made of a material with good conductivity, and the better the conductivity, the better the performance of the concentrator. It also improves. Its conductivity also determines the amount of magnetic flux radiated by the concentrator. Ru. Non-magnetic or magnetic conductors can also be used. Seven preferred specific examples of the present invention This will be explained below with reference to the drawings.
第１図、第２図は従来技術になる構成を示しており、第３図〜第１４図は本発明 による各種の実施例（例として示す）をそれぞれ示す。Figures 1 and 2 show the configuration of the prior art, and Figures 3 to 14 show the configuration of the present invention. Various embodiments (shown by way of example) are shown below.
本明細書の全体を通じて「コイル」という術語は非限定的に解釈さるべきである 。術語「フィル」は本発明の応用面が広いので、例えば信号受信装置を言うこと も、磁界受容装置を指すこともある。当該技術関係者に理解されるように、本明 細書に言う金属の形状は特別のものに限定さるべきでない。Throughout this specification, the term "coil" should be construed in a non-limiting manner. . The term "fil" has a wide range of applications for the present invention, so for example, it can refer to a signal receiving device. It can also refer to a magnetic field receptor device. The present invention, as understood by those skilled in the art, The shape of the metal mentioned in the specifications should not be limited to any particular shape.
金属の形状はその用途に応じて定まる。The shape of the metal is determined depending on its use.
また本明細書のどこにあっても、「信号」なる術語はいかなる形の電磁放射も含 む。つまり、信号は例えば、付勢信号またはデータあるいは情報信号のいずれで もよい。Additionally, elsewhere in this specification, the term "signal" includes any form of electromagnetic radiation. nothing. That is, the signal may be, for example, an activation signal or a data or information signal. Good too.
受信コイルの近傍に金属を配器するとコイルの受信能力が低下することは公知と なっているが、後述するように金属シ−トをコイルと並置してかつそのコイルと 実質的に同一の平面の上に置いてもコイルの受信能力にマイナスの影響が及ぶこ とはない。第３図はコイルと同一の平面」二に首いた金属シートを示している。It is well known that placing metal near the receiving coil will reduce the receiving ability of the coil. However, as described later, if the metal sheet is placed in parallel with the coil and the coil Even if the coils are placed on virtually the same plane, the reception ability of the coils may be negatively affected. There is no such thing. Figure 3 shows a bent metal sheet in the same plane as the coil.
この金属はコイルに衝突する磁束の量を増すものである。金属によるコイルへの 磁束の増大はその金属とコイルとの間隔に反比例する。This metal increases the amount of magnetic flux that impinges on the coil. Metal to coil The increase in magnetic flux is inversely proportional to the distance between the metal and the coil.
第４図はコイルの平面上で金属で囲まれたコイルを示す。FIG. 4 shows a coil surrounded by metal in the plane of the coil.
図示の如く、循環電流によって生じる磁束は、加えられた電流に対向し、これを 小さくしてしまう。従って、金属が包囲しているコイルの場合磁束の強化は生じ ない。As shown, the magnetic flux generated by the circulating current opposes the applied current and Make it smaller. Therefore, in the case of a coil surrounded by metal, magnetic flux enhancement occurs. do not have.
第５図も第４図に示すものと形状が類似した金属を示している。しかしこの金属 には、金属がコイルを不連続に包囲するようにスロットまたはギャップが設けら れている。FIG. 5 also shows a metal similar in shape to that shown in FIG. But this metal has slots or gaps so that the metal discontinuously surrounds the coil. It is.
コイルを囲む金属に設けたギャップにより、うず電流（衝突磁束に応じて生じる ）は、コイルに衝突する磁束を増大させる磁界を生じさせる。A gap in the metal surrounding the coil creates eddy currents (generated in response to the colliding magnetic flux). ) produces a magnetic field that increases the magnetic flux impinging on the coil.
第６図は上記と同様の集中装置である。FIG. 6 shows a concentrator similar to the one described above.
集中装置は好ましくは下記の２つの形態で構成する。The concentrator is preferably constructed in two forms:
（１）磁束を通過させる孔を設けた金属板。１つもしくはそれ以上のスロットを その孔から周囲まで形成して循環電流を軽減し、これによって孔の周囲からの磁 束の急激低減を生じさせる。上記スロットは、中心孔の囲りに連続導電路が実質 上存在しない限り重なっていてよいく第５図、第６図、第７図）。本願と同時出 願のオーストラリア国特許畠願ＰＩ ７１９８号「アンテナ構造およびその製造 方法」およびＰＪ １６９３ ｒ ）ランスポンダにアンテナとして使用する 誘導部材」 （オーストラリア国Ｍａｇｅ！ｌａｎ Ｃａｒｐｏｒａ、ｔｉｏｎ Ｐｔｙ、Ｌｉｍ１ｔｅｅを出願人として出願）には電気コイルとコンデンサと を同時製作する方法が開示されている。こうして製作したコンデンサ・プレート は実質上「Ｃ」の形状を施すことができ、前記のように関連のコイルを包囲して 配することができるので都合がよい。(1) A metal plate with holes that allow magnetic flux to pass through. one or more slots It is formed from the hole to the surrounding area to reduce the circulating current, thereby reducing the magnetic field from around the hole. causing a sudden reduction in the bundle. The above slot has a substantially continuous conductive path around the center hole. (Figures 5, 6, and 7) may overlap as long as they do not exist above each other. Issued at the same time as the main application Australian Patent Application No. PI 7198 “Antenna structure and its manufacture” method” and PJ 1693 r) Use as an antenna in a transponder Guidance member” (Australia Mage!lan Carpora, tion Pty, Lim1tee as applicant) includes electric coils and capacitors. A method for simultaneously manufacturing is disclosed. Capacitor plate made in this way may be substantially "C" shaped, surrounding the associated coil as described above. It is convenient because it can be placed anywhere.
この技法によれば、上記コンデンサ・プレートが消耗する部域を上記コイルの磁 束収集能力に対して使用できる。According to this technique, the area where the capacitor plate wears out is connected to the magnetic field of the coil. Can be used against bundle gathering abilities.
（ｉｉ）高い導電性のワイヤー、例えば第７図、第９図、第１０図に示す金属板 の周囲に沿って曲げられたワイヤーを使用したワイヤー・ループ集中装置はその ワイヤーが連続導電路を形成すれば同じ集中機能を発揮するものである。(ii) Highly conductive wires, such as metal plates shown in Figures 7, 9 and 10; A wire loop concentrator using wire bent around the perimeter of the If the wires form a continuous conductive path, they will perform the same concentrating function.
図示の上記の２例の形態の集中装置の動作は下記の通゛りである。すなわち、 （ｉ）金属板の表面に誘導された循環電流は交番磁束が表皮の深さ以下に貫入す るのを防ぐ。銅板の場合１００Ｋｆｌｚでその貫入度は約０．１８ｒ＋ｕｎであ る。従って、交番磁束は厚い金属板には貫入し得す、導電性の障害物の囲りを流 れる。金属板に孔を形成する乏、金属板によって遮断される磁束の一部は孔を通 って偏向させられ、その部域における磁束密度を増大させるが、金属板の外縁の 囲りでは均衡が生じる（第８図）。しかし、スロットがなければ金属板は単巻短 絡回路として作用する。これによって中心孔において大きさがほとんど等しく反 対方向の磁束が維持され、その孔を通過せん゛とする磁束は大部分が消去させら れる。これは磁界集中の目的に対してはマイナスの効果であるが、ある部域から 磁束を実質的に排除するのに使用できる。The operation of the above two illustrated concentrators is as follows. That is, (i) Circulating current induced on the surface of the metal plate causes alternating magnetic flux to penetrate below the depth of the skin. prevent it from happening. In the case of copper plate, the penetration degree is about 0.18r+un at 100Kflz. Ru. Therefore, alternating magnetic flux flows around conductive obstacles, which can penetrate thick metal plates. It will be done. When a hole is formed in a metal plate, part of the magnetic flux blocked by the metal plate passes through the hole. is deflected by the outer edge of the metal plate, increasing the magnetic flux density in that area. Equilibrium occurs in the enclosure (Figure 8). However, if there is no slot, the metal plate will have a short single winding. Acts as a circuit. This results in almost equal size and antireflection in the center hole. The magnetic flux in the opposite direction is maintained, and the magnetic flux that attempts to pass through the hole is largely not eliminated. It will be done. Although this is a negative effect for the purpose of magnetic field concentration, Can be used to substantially eliminate magnetic flux.
（ｉｉ）ワイヤー・ループは単巻き短絡回路の作用をもつ。(ii) The wire loop has the effect of a single turn short circuit.
このワイヤー・ループに生じる逆起電力のために、内、外ループどうしの間の空 間を通過する全磁束を、抵抗損失の点でのみ極めて小さくすることができる。ル ープ構成によりさえぎられる磁束は金属板（第９図）の場合と実質上同じように 内ループに集中させられる。Due to the back emf generated in this wire loop, there is no air space between the inner and outer loops. The total magnetic flux passing between them can be made extremely small only in terms of resistive losses. le The magnetic flux intercepted by the loop configuration is virtually the same as for the metal plate (Figure 9). Concentrates on the inner loop.
ワイヤー・ループ集中装置はある部域から磁束を実質排除するのにも使用できる 。ワイヤー接続部を内、外ループどうしの間に、それらを接触させずに、通過さ せることにより、内ループを通過する磁束は急減させられる。第１０図はこの構 成例を示す。Wire loop concentrators can also be used to virtually eliminate magnetic flux from an area. . Pass the wire connections between the inner and outer loops without touching them. By doing so, the magnetic flux passing through the inner loop is rapidly reduced. Figure 10 shows this structure. An example is shown.
第１１図は静電ファラデー・シールドとして作用する磁界集中装置の例を示す。FIG. 11 shows an example of a magnetic field concentrator that acts as an electrostatic Faraday shield.
このファラデー・シールドは磁界集中装置を形成する場合は延長し、またあるい は既存の集中装置に接続できる。This Faraday shield can be extended to form a magnetic field concentrator or can be connected to existing concentrators.
静電シールディングによればコイルの近くにある物体に対するコイルの容量性感 度が下げられる。ファラデー・シールドは容量性感度を調整する場合、コイルの 囲りに一部分のみ延長させてもよい。According to electrostatic shielding, the capacitive sensitivity of the coil to objects near the coil The degree is lowered. A Faraday shield is used to adjust the capacitive sensitivity of the coil. It is also possible to extend only a portion of the enclosure.
これに代って、２つの磁界集中板を使用しても磁界集中や静電シールディングを 得ることができる。その場合、第１２図に示すように１枚の集中板はコイルの前 方、もう一枚はコイルの背後に置く。Alternatively, two magnetic field concentration plates can be used to prevent magnetic field concentration and electrostatic shielding. Obtainable. In that case, one concentration plate is placed in front of the coil as shown in Figure 12. On the other hand, place the other one behind the coil.
第１３図はこの構成の横断図を示す。前部、後部の集中板どうしの接続はそれら の板に沿ってどこにおいても行なえるが、好ましくはその接続はコイルの内側お よび／または外側において行なうことである。第１４Ａ図、第１４Ｂ図、第１４ Ｃ図参照。FIG. 13 shows a cross-sectional view of this configuration. The connections between the front and rear concentration boards are The connection can be made anywhere along the plate, but preferably the connection is inside the coil or and/or outside. Figure 14A, Figure 14B, Figure 14 See figure C.
σｒｃｕｑｃ ＞ ４１１Ｅコイル１；隣詞ｌ゛ろ平面上１；置い丘工馬イ ≧実勧蝕。。１噌武 補正書の翻訳文提出書 （特許法第１８４条の８） 平成２年８月４日 特許庁長官 植 松 敏 殿 ｌ 特許出願の表示 ＰＣＴ／ＡＵ８９１０ Ｏ０３６ ２発明の名称 磁界集中装置 ３ 特許出願人 名 称 二ニスキャン リミティド （外１名）４代理人 住 所 東京都港区虎ノ門−丁目８番１０号静光虎ノ門ビル〒１０５ 電話（ ５０４）０７２１ 氏名弁理士（６５７９）青水 朗 （外４名） ５ 補正書の提出年月日 １９９０年３月１９日 ６ 添付書類の目録 補正書の翻訳文 １通請求の範囲 １．受信手段により受信されるように信号を集中するものであって、上記受信手 段に並置された導電部分を含んでおり、」−記導電部分は少なくとも１つのコン デンサ・プレートを含み、上記の信号を受信しかつ更なる信号を上記受信手段へ 衝突させ、これにより上記受信手段による受信を強化するように配向されている 、集中装置。σrcuqc 411E coil 1; Adjacent l゛ro on the plane 1; ≧Actually recommended. . 1 sabu Submission of translation of written amendment (Article 184-8 of the Patent Law) August 4, 1990 Commissioner of the Patent Office Toshi Ue Matsu l Display of patent application PCT/AU8910 O036 2. Name of the invention magnetic field concentrator 3 Patent applicant Name: Niniscan Limited (1 other person) 4 agents Address: 105 Shizukou Toranomon Building, 8-10 Toranomon-chome, Minato-ku, Tokyo Telephone: 504)0721 Name Patent Attorney (6579) Akira Aomi (4 other people) 5 Date of submission of written amendment March 19, 1990 6 List of attached documents Translation of written amendment 1 copy of claims 1. It concentrates the signal so that it is received by the receiving means, and the receiving means conductive portions juxtaposed in rows, the conductive portions comprising at least one conductive portion. a capacitor plate for receiving said signal and for transmitting further signals to said receiving means; oriented to collide and thereby enhance reception by said receiving means. , concentration device.
２、導電部分を含んでおり、磁界を受は磁束を上記導電部分から放射させるよう に配向されており、また上記磁界も受けるようになっている受信手段に対し、上 記受信手段が上記磁界に加えて上記磁束も受けるように並置されている、磁界集 中装置。2. Contains a conductive part, which receives the magnetic field and radiates magnetic flux from the conductive part. For the receiving means which is oriented to a magnetic field concentrator, wherein the recording and receiving means are juxtaposed so as to receive the magnetic flux in addition to the magnetic field; Medium equipment.
３、上記導電部分が金属で作られている、請求項１または２に記載の集中装置。3. Concentrating device according to claim 1 or 2, wherein the electrically conductive part is made of metal.
４、受信手段による磁界受容を強化するようになっており、−■−記受信手段に 並置されてこの受信手段に影響を及ぼすようになっている磁界集中装置であって 、１つの平面上で上記受信手段を実質的に包囲する金属部分を含んでおり、この 金属部分は史には上記平面上で不連続的に受信手段を部分的もしくは全体的に取 囲むようになっており、こうして上記磁界による放射時に磁束を生じさせ、この 磁束を上記磁智と共に上記受信手段により受けるようになっている、磁界集中装 置。4. It is designed to strengthen the magnetic field reception by the receiving means, and -■- a magnetic field concentrator arranged in juxtaposition to influence this receiving means; , comprising a metal portion substantially surrounding said receiving means on one plane; Historically, the metal part was used to discontinuously attach the receiving means partially or completely on the above plane. This creates a magnetic flux when radiated by the magnetic field, and this A magnetic field concentrator device configured to receive the magnetic flux by the receiving means together with the magnetic wisdom. Place.
５、受信手段を囲むようになっていて、第１．第２の相互接続された部分および 第１、第２の相互接続部分からなるループを含んだ磁界集中装置であって、 上記第１の相互接続された部分が第１、第２の相互接続された領域を有すると共 に少なくとも１つの容量性領域を含み、この第１の相互接続された部分は上記第 １、第２の相互接続された領域どうしの間において連続しており、第１の相互接 続された領域は第２の相互接続された領域に並置されると共にその第２の相互接 続された領域から離間しており、この第１の相互接続された部分は上記受信手段 を包囲するようになっており、 上記第２の相互接続された部分が第３、第４の相互接続された領域を有すると共 に少なくとも１つの容量性領域を含んでおり、この第２の相互接続された部分も 上記第３、第４の相互接続された領域どうしの間に連続しており、ホ器播≠の・ 二゛−°〜・ ゛ −上記第３の相互接続された領域は上記第４ 領域に並置されると共にその第４の相互接続された領域から離間しており、この 第２の相互接続された部分は上記第１の相互接続された部分を実質的に取囲んで おり、 上記第１の相互接続部分は上記第１の相互接続された領域を上記第３の相互接続 された領域に接続するようになっており、また上記第２相互接続部分は上記第２ の相互接続された領域を上記第４の相互接続された領域に接続するようになって おり、上記第１、第２の相互接続部分は互いに他に並置されかつ互いに他から離 間されており、こうしてループが連続形成されている、磁界集中装置。5, surrounding the receiving means, the first. a second interconnected portion and A magnetic field concentrator including a loop consisting of first and second interconnected portions, the device comprising: the first interconnected portion having first and second interconnected regions; at least one capacitive region, the first interconnected portion comprising at least one capacitive region in the first interconnected region. 1. Continuous between the second interconnected regions and having a first interconnected region; The interconnected region is juxtaposed to and connected to the second interconnected region. the first interconnected portion being spaced apart from the interconnected area; It is designed to surround the the second interconnected portion having third and fourth interconnected regions; includes at least one capacitive region, and this second interconnected portion also includes at least one capacitive region. It is continuous between the third and fourth interconnected regions, and the 2゛−°〜・ ゛ -The third juxtaposed to the region and spaced from the fourth interconnected region; a second interconnected portion substantially surrounding said first interconnected portion; Ori, The first interconnection portion connects the first interconnected region to the third interconnection region. and the second interconnection portion is adapted to connect to the second interconnection region. interconnected region to the fourth interconnected region. and the first and second interconnection portions are juxtaposed to each other and spaced apart from each other. A magnetic field concentration device in which a loop is continuously formed.
６、磁界の入射時には、上記第１、第２の相互接続された部分どうしの間に実質 上磁束を移動させず、磁界を上記第１の相互接続された部分を通じて偏向させ上 記受信手段へ入射させる、請求項５に記載の集中装置。6. When a magnetic field is applied, there is a substantial gap between the first and second interconnected parts. The upper magnetic field is deflected through the first interconnected portion without moving the upper magnetic flux. 6. The concentrating device according to claim 5, wherein said concentrating device is made to enter said receiving means.
７、更に、上記受信手段の少なくとも一部に作用する静電ファラデー・シールド を含んでいる、請求項１． ２． ４． ５゜６のいずれか１つに記載の集中装 置。7. Further, an electrostatic Faraday shield acting on at least a portion of the receiving means. Claim 1. 2. 4. Concentrated equipment as described in any one of 5.6 Place.
８、各部分が実質上“Ｃ”形状である。請求項１． ２． ４゜５．６のいずれ か１つに記載の集中装置。8. Each section is substantially "C" shaped. Claim 1. 2. 4゜5.6 Concentrating device according to any one of the above.
９、請求項１． ２． ４． ５． ６のいずれか１つに記載の集中装置を含む 、トランスポンダ、小さいＩＤカード、証示カードまたはアクチュエータ等の装 置。9. Claim 1. 2. 4. 5. Contains the concentration device described in any one of 6. , transponders, small ID cards, identification cards or actuators. Place.
１０、所定の部域内において磁界からの放射を軽減するシールドであって、第１ 、第２の部分と、第３、第４の相互接続部分とを含むループからなり、 上記第１部分は第１、第２の領域を有すると共に少なくとも１つの容量性領域を 含み、その第１部分は上記第１、第２の領域どうしの間で連続しており、上記第 １領域は第２領域に実質上対向して並置されると共にその第２領域から離間され ており、この第１部分が上記所定部域を実質上取囲んでおり、 上記第２部分は第３、第４領域を有すると共に少なくとも１つの容量性領域を有 し、これら第３、第４の領域は上記の第１、第２領域に対しそれぞれ整列されて おり、この第２部分は上記第３、第４の領域どうしの間において連続しており、 第３領域が第４領域に実質上対向して並置されると共にその第４領域から離間さ れており、この第２部分は上記第１部分を実質上取囲んでおり、 上記第３の相互接続部分は上記第１、第４の領域を接続し、また第４相互接続部 分は上記第２、第３の領域を接続するようになっており、こうして 上記磁界を、第１部分を磁界とする部域から実質的に排除する、ようになってい る、シールド。10. A shield for reducing radiation from a magnetic field within a predetermined area, the shield comprising: , a loop including a second portion and third and fourth interconnection portions; The first portion has first and second regions and at least one capacitive region. the first portion is continuous between the first and second regions, and the first portion is continuous between the first and second regions; one region is substantially oppositely juxtaposed to and spaced apart from a second region; and the first portion substantially surrounds the predetermined area; The second portion has third and fourth regions and at least one capacitive region. These third and fourth regions are aligned with the first and second regions, respectively. and this second portion is continuous between the third and fourth regions, The third region is substantially oppositely juxtaposed to and spaced apart from the fourth region. and the second portion substantially surrounds the first portion; The third interconnection portion connects the first and fourth regions, and the third interconnection portion connects the first and fourth regions. The minute is designed to connect the second and third areas above, thus The magnetic field is substantially excluded from the area where the first portion is the magnetic field. Shield.
１１、所定部域内からの磁界放射を実質上無くするシールドであって、上記部域 を実質上包囲する第１導電部分と、上記第１導電部分を実質上包囲すると共にそ の第」導電部分から離間されている第２導電部分とを含んでおり、上記第１、第 ２の導電部分は各々少なくとも１つのコンデンサ・プレートを含んでおり、上記 第１、第２部分の端領域どうしを重ね合わせて接続して１つの連続条板を形成し 、これにより、磁界による放射時に磁界を上記部域から実質上偏向させる、シー ルド。11. A shield that substantially eliminates magnetic field radiation from within a predetermined area, which a first electrically conductive portion substantially surrounding the first electrically conductive portion; a second conductive portion spaced apart from the first conductive portion; The two conductive parts each include at least one capacitor plate, and the two conductive parts each include at least one capacitor plate. The end regions of the first and second portions are overlapped and connected to form one continuous strip. , thereby providing a shield that substantially deflects the magnetic field away from the region when radiated by the magnetic field. Ludo.
１２、各導電部分が金属で作られている、請求項１１に記載の１３、請求項１０ 〜１２のいずれか１つに記載のシールドを含んでいる、トランスポンダ、小さい ＩＤカード、証書カードまたはアクチュエータ等の装置。12. 13. Claim 10 of claim 11, wherein each conductive portion is made of metal. Transponder, small, comprising a shield according to any one of ~12 Devices such as ID cards, certificate cards or actuators.
第４図はコイルの平面上で金属で囲まれたフィルを示す。FIG. 4 shows a fill surrounded by metal in the plane of the coil.
図示の如く、循環電流によって生じる磁束は加えられた電流に対向しこれを小さ くしてしまう。従って、金属が包囲しているコイルの場合磁束の強化は生じない 。As shown in the figure, the magnetic flux generated by the circulating current opposes the applied current and reduces it. I end up losing it. Therefore, no magnetic flux enhancement occurs in a coil surrounded by metal. .
第５図も前記のものと形状が類似した金属を示している。FIG. 5 also shows a metal similar in shape to that described above.
しかしこの金属には、金属がコイルを不連続に包囲するようにスロットまたはギ ャップが設けられている。However, this metal has slots or gears that allow the metal to discontinuously surround the coil. A cap is provided.
コイルを囲む金属に設けたギャップにより、うず電流（衝突磁束に応じて生じる ）は、コイルに衝突する磁束を増大させる磁界を生じさせる。A gap in the metal surrounding the coil creates eddy currents (generated in response to the colliding magnetic flux). ) produces a magnetic field that increases the magnetic flux impinging on the coil.
第６図は上記と同様の集中装置である。FIG. 6 shows a concentrator similar to the one described above.
集中装置は好ましくは下記の２つの形態で構成する。The concentrator is preferably constructed in two forms:
（ｉ）磁束を通過させる孔を設けた金属板。１つもしくはそれ以上のスロットを その孔から周囲まで形成して循環電流を軽減し、これによって孔の周囲からの磁 束の急激低減を生じさせる。上記スロットは、中心孔の回りに連続導電路が実質 上存在しない限り重なっていてよいく第５図、第６図、第７図）。本願と同時出 願のオーストラリア国特許出願Ｐ１７１９８号「アンテナ構造およびその製造方 法」およびＰＪ１６９３ ｒ トランスポンダにアンテナとして使用する誘導部 材」 （オーストラリア国Ｍａｇｅｌｌａｎ Ｃｏｒｐｏｒａｔｉｏｎ Ｐｔｙ 、Ｌｉｍ１ｔｅｅを出願人として出願）には電気コイルとコンデンサとを同時製 作する方法（現在はＰＣＴ明細書ＰＣＴ／ ＡｔＪ８９／ １００９５となって いる）が開示されている。(i) A metal plate provided with holes through which magnetic flux passes. one or more slots It is formed from the hole to the surrounding area to reduce the circulating current, thereby reducing the magnetic field from around the hole. causing a sudden reduction in the bundle. The above slot has a substantially continuous conductive path around the central hole. (Figures 5, 6, and 7) may overlap as long as they do not exist above each other. Issued at the same time as the main application Australian Patent Application No. P17198 “Antenna structure and method of manufacturing the same” Induction section used as antenna for transponder and PJ1693 r (Magellan Corporation Pty., Australia) , filed with Lim1tee as the applicant), which manufactures electric coils and capacitors at the same time. How to create (currently PCT specification PCT/AtJ89/10095) ) are disclosed.
トランスポンダ、ＩＤ装置等は相互接続したインダクタまたはコイルとコンデン サからなる共振回路を含みまた大規模集積（νＬＳＩ）回路チップに埋込んだ相 互接続された能動回路も任意選択で有している。それらの共振回路はいくつかの 呼掛器または同様の装置の発生する外部電磁界から電力を受けるようになってい る。任意選択機能として共振回路はそのようにして受けかつ集められた電力を能 動回路−＼供給し、するとこれらの能動回路は所定のように適宜の電気信号を発 生する。このような信号は更に別のインダクタ、つまり、いくかの外部受容装置 、好まし７くは同一の呼掛器によって受信される信号を発信するアンテナとして 機能するインダクタ、好ましくは同じ電力を受けるインダクタへ送られる。Transponders, ID devices, etc. have interconnected inductors or coils and capacitors. It also includes a resonant circuit consisting of It also optionally has interconnected active circuitry. Those resonant circuits are some is powered by an external electromagnetic field generated by an interrogator or similar device. Ru. As an optional feature, the resonant circuit can perform the power so received and collected. active circuits - ＼, and these active circuits then emit appropriate electrical signals as specified. live. Such a signal may be passed through a further inductor, i.e. some external receptor device. , preferably as an antenna emitting a signal to be received by the same interrogator. It is sent to a functioning inductor, preferably an inductor receiving the same power.
こうして製作したコンデンサ・プレートは実質上「ＣＪの形状を施すことができ 、前記のように関連のコイルを包囲して配することができるので都合がよい。こ の技法によれば、上記コンデンサ・プレートが消耗する部域を上記コイルの磁束 収集能力に対して使用できる。The capacitor plate manufactured in this way can be virtually given the shape of a “CJ”. , it is advantageous that the related coils can be arranged in a surrounding manner as described above. child According to the technique of Can be used against gathering abilities.
（ｉｉ）高い導電性のワイヤー、例えば第７図、第９図、第１０図に示す金属板 の周囲に沿って曲げられたワイヤーを使用したワイヤー・ループ集中装置はワイ ヤーを使用したワイヤー・ループ集中装置はそのワイヤーが連続導電路を形成す れば同じ集中機能を発揮するものである。(ii) Highly conductive wires, such as metal plates shown in Figures 7, 9 and 10; A wire loop concentrator using a wire bent around the perimeter of the A wire loop concentrator using a They exhibit the same concentration function.
１１＋１Ｍｍ＃ｌ＾−６陶””” ＰＣＴ／ＡＬＩ ８９１０ｏ（＋３６ コ11+1Mm#l^-6 Ceramic """ PCT/ALI 8910o (+36 Ko
Claims (15)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPI658188 | 1988-02-04 | ||
| AU6581 | 1988-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03503467A true JPH03503467A (en) | 1991-08-01 |
Family
ID=3772776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1501854A Pending JPH03503467A (en) | 1988-02-04 | 1989-02-03 | magnetic field concentrator |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0397755A4 (en) |
| JP (1) | JPH03503467A (en) |
| CA (1) | CA1334215C (en) |
| WO (1) | WO1989007347A1 (en) |
| ZA (1) | ZA89872B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CA1334215C (en) | 1995-01-31 |
| WO1989007347A1 (en) | 1989-08-10 |
| ZA89872B (en) | 1990-10-31 |
| EP0397755A4 (en) | 1992-11-04 |
| EP0397755A1 (en) | 1990-11-22 |
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