TW200805794A - Antenna coil for mounting on substrate and antenna device with such antenna coil - Google Patents
Antenna coil for mounting on substrate and antenna device with such antenna coil Download PDFInfo
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- TW200805794A TW200805794A TW95146216A TW95146216A TW200805794A TW 200805794 A TW200805794 A TW 200805794A TW 95146216 A TW95146216 A TW 95146216A TW 95146216 A TW95146216 A TW 95146216A TW 200805794 A TW200805794 A TW 200805794A
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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
- H01Q7/06—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 with core of ferromagnetic material
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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
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
Abstract
Description
200805794 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種基;te i 於一種基柘描肢m ^ .200805794 IX. INSTRUCTIONS: [Technical field to which the invention pertains] The present invention relates to a base; te i is a kind of base limb m ^ .
特別期盼期可實現高性能、 用之RFID系統中，在行動電 上個別裝載資訊通訊用天線以 對襄載於行動電子機器之天線 低價格、體積小之要求，為實 現該等要求而廣泛使用天線線圈者。 例如，在專利文獻丨中，揭示裝載於行動電子機器之 天線第16圖係顯不專利文獻1所揭示之天線裝置構造 之立體圖°構成資訊通訊用天線1G2 (構裝於基板1〇1上） 之線圈，係由複數個區段（segment)1〇2a，1〇2b構成。各區 奴係由磁性體鐵心與捲繞在其周圍之線圈構成。第〗區段 l〇2a之線圈捲繞方向係向左捲繞，第2區段1〇沘之線圈 捲繞方向係向右捲繞，第i區段102a之線圈與第2區段1〇沘 之線圈相連接。在各區段1〇2a，1〇2b之間設有未形成線圈 導體之部分（以下，稱為非捲繞部）。以此方式構裝天線線 圈102時’與基板垂直之磁通進入非捲繞部後彎曲大致 〇 ’接著導引至第1區段l〇2a與第2區段102b。接著， 磁通通過各區段1〇2a，1〇2b之線圈的線圈轴，藉此在線圈 5 200805794 上感應電壓即能通訊。 專利文獻1 :曰本特開平1 1 — 122146號公報 【發明内容】 上述天線線圈102，其進入線圈導體之非捲繞部之磁 通係導引至各區段l〇2a，l〇2b，藉此成為具有天線功能之 構造。非捲繞部較小時無法捕捉充分的磁通，過大時由於 磁通不會被導引至各區段l〇2a，l〇2b，因此，在任一情形 _ 下磁通均不通過各區段102a，102b之線圈的線圈軸，不會 引起電磁感應。因此，各區段1〇2a，1〇2b須相隔一定間隔 . 5又置。 然而’依專利文獻1所揭示之構造，當將天線102構 裝於行動電子機器之基板1〇1時，構成天線1〇2之各區段 1 〇2a，1 〇2b係個別固定。因此，若欲使區段間距離保持一 疋，則必須進行固定部位之微調，需要多階段之步驟。又， 區段間距離因固定部位而有不同，具有下述問題，即依設 _ 置天線之行動電子機器之構造而無法實現所欲之天線靈敏 度。 因此，本發明之目的在於提供一種設置容易，且天線 靈敏度不因設置部位產生偏差之基板構裝用天線線圈。 又，本發明之另一目的在於提供一種對來自外部之磁 通具有高靈敏度的天線裝置。 為了解決上述問題，本發明之基板構裝用天線線圈具 備.平板狀之第1磁性體鐵心；平板狀之第2磁性體鐵心， 係與第1磁性體鐵心隔著間隙並排設置；一片軟性基板， 6 200805794 係捲繞於該2個磁性體鐵心，且在表面形成導體；第1線 P 係错由該導體形成於第1磁性體鐵心周圍；第2線 圈部，係藉由該導體形成於第2磁性體鐵心周圍，線圈軸 方向與該第1線圈部一致，捲繞方向與第1線圈部相反； 以及連接導體，係藉由該導體形成，用以連接第1線圈部 與第2線圈部。 又’没该天線線圈之線圈轴方向長度為A、第1磁性 _ 體鐵心與第2磁性體鐵心之距離為B時，天線線圈若滿足 〇·7Α-Β-〇·5Α則具有較佳效果。 又，較佳係，第1磁性體鐵心與第2磁性體鐵心形狀 • 相同。 又，較佳係，第1磁性體鐵心與第2磁性體鐵心係以 主面朝同一方向之方式並排設置。 又’較佳係’位於該線圈軸方向之兩外側之該第1磁 性體鐵心與該第2磁性體鐵心之端部中至少一方連接有磁 性體鐵心。 又，弟1線圈部與第2線圈部之線圈捲繞數可彼此相 同，亦可彼此不同。 又，亦能形成有2個以上連接導體（連接第丨線圈部與 第2線圈部）。 ~ 又，亦能在天線線圈之主面其中一方形成有電極。 再者’亦可具傷第3磁性體鐵心，此第3磁性體鐵心 連接第1磁性體鐵心與第2磁性體鐵心，且在與第丄磁性 體鐵心及第2磁性體鐵心並排方向正交之方向之截面積， 7 200805794 較第1磁性體鐵心與第2磁性體鐵心為小。 又，如上述構裝之構成有基板構裝用天線線圈之電路 基板’設該基板構裝用天線線圈之線圈轴方向長度為X、 假想線（該線圈軸方向之該基板構裝用天線線圈之中心線 投影於該電路基板上）與該電路基板外周之2個交又點間 之距離為γ時，較佳係滿足Y - X - 0.8Y。 又’設該假想線與該基板構裝用天線線圈之線圈軸方 _ 向之端面之2個交叉點分別為xl，x2、該假想線與該電路 基板外周之2個交叉點中接近χΐ之交叉點為yi、接近χ2 3 之交又點為3"2、xl與yl之距離為Dl、χ2與y2之距離為 " D2時，較佳係D1=D2。 再者’較佳係，基板構裝用天線線圈以與電路基板具 有間隙之方式構裝於該電路基板，該天線線圈在與該電路 基板相對向之面形成有該電極。 依據以上構成，本發明能達到以下之效果。 φ 在第1磁性體鐵心與第2磁性體鐵心捲繞軟性基板， 構成具有第1線圈部與第2線圈部之基板構装用天線線 圈’藉此，形成於第1線圈部與第2線圈部間之非捲繞部 之面積係保持一定，因此能實現不受基板構裝方法影響， 具有既定天線靈敏度之天線線圈。 又，構裝天線線圈之天線裝置，以設天線線圈之線圈 轴方向長度為X、假想線（線圈轴方向之磁性體鐵心之中 心線投影於電路基板上）與電路基板外周之2個交又點間 之距離為Y時，滿足Y-X-0.8Y之方式構裝天線線圈， 8 200805794 % 藉此，在天線線圈（位於弟1磁性體鐵心與第2磁性體鐵心 並排方向）之端部磁阻變小，因此能提高天線線圈之集磁效 果，構成具有高通訊靈敏度之天線裝置。 【實施方式】 (第1實施形態） 參照第1圖及第2圖說明第i實施形態之基板構裝用 天線線圈之構造。第1圖係顯示第丨實施形態之基板構裝 用天線線圈構造之立體圖及俯視圖。第2圖係顯示捲繞於 磁性體鐵心前之軟性基板構造之俯視圖。 如第1圖所示，第1實施形態之天線線圈2具備：第 1磁性體鐵心4a、第2磁性體鐵心4b、及捲繞於第i磁性 體鐵心4a與第2磁性體鐵心4b周圍之一片軟性基板$。 此外，雖軟性基板5用單線顯示，但實際上具有數1〇 #瓜 左右之厚度。 第1磁性體鐵心4a與第2磁性體鐵心4b係分別使用 φ 例如主面橫方向為8mm、縱方向為10mm之矩形，厚度 Umm之肥粒鐵作…⑷。第1、第2磁性體鐵心^，仆: =面橫方向的邊係位於同一直線上，第i磁性體鐵心鈍與 第磁欧體鐵，o 4b間之距離為24mm。藉由如此配置所形 成之第1磁性體鐵心4a與第2磁性體鐵心4b之間隙稱為 非捲繞部。 再者，在軟性基板5之表面形成有導體，藉由該導體， :第1磁性體鐵心4a與第2磁性體鐵心4b周圍分別構成 弟1線圈部2a與第2線圈部2b。帛i線圈部2a，係以在 9 200805794In the RFID system with high expectations and high performance, the antennas for information communication are individually loaded on the mobile power to meet the requirements of low price and small size of the antennas carried in mobile electronic devices. Use antenna coils. For example, in the patent document, the antenna mounted on the mobile electronic device is shown in Fig. 16. The perspective view of the antenna device structure disclosed in Patent Document 1 constitutes the information communication antenna 1G2 (constructed on the substrate 1〇1). The coil is composed of a plurality of segments 1〇2a, 1〇2b. The slaves in each zone are composed of a magnetic core and a coil wound around it. The coil winding direction of the first section l〇2a is wound to the left, and the coil winding direction of the second section 1〇沘 is wound to the right, and the coil of the i-th section 102a and the second section 1〇 The coils of the cymbals are connected. A portion where the coil conductor is not formed (hereinafter referred to as a non-winding portion) is provided between each of the segments 1〇2a and 1〇2b. When the antenna coil 102 is constructed in this manner, the magnetic flux perpendicular to the substrate enters the non-winding portion and is bent substantially 〇 and then guided to the first segment 10a and the second segment 102b. Then, the magnetic flux passes through the coil axes of the coils of the respective segments 1〇2a, 1〇2b, whereby the voltage can be communicated when the coil 5 200805794 is induced. Patent Document 1: Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Thereby, it becomes a structure which has an antenna function. When the non-winding portion is small, sufficient magnetic flux cannot be captured. When the non-winding portion is small, since the magnetic flux is not guided to the respective segments l〇2a, l〇2b, in any case, the magnetic flux does not pass through the respective regions. The coil axes of the coils of segments 102a, 102b do not cause electromagnetic induction. Therefore, each section 1〇2a,1〇2b must be separated by a certain interval. However, according to the configuration disclosed in Patent Document 1, when the antenna 102 is mounted on the substrate 1〇1 of the mobile electronic device, the segments 1 〇 2a, 1 〇 2b constituting the antenna 1 〇 2 are individually fixed. Therefore, if the distance between the segments is to be maintained at a distance, fine adjustment of the fixed portion must be performed, and a multi-stage step is required. Further, the distance between the segments differs depending on the fixed portion, and there is a problem that the desired antenna sensitivity cannot be achieved depending on the structure of the mobile electronic device in which the antenna is placed. Accordingly, it is an object of the present invention to provide an antenna coil for a substrate assembly which is easy to install and which does not cause variations in antenna sensitivity due to installation portions. Further, another object of the present invention is to provide an antenna device having high sensitivity to magnetic flux from the outside. In order to solve the above problem, the antenna coil for substrate assembly of the present invention includes a flat first magnetic core; and a flat second magnetic core is arranged side by side with the first magnetic core; a flexible substrate , 6 200805794 is wound around the two magnetic cores and forms a conductor on the surface; the first line P is formed by the conductor around the first magnetic core; and the second coil is formed by the conductor. The coil axis direction is aligned with the first coil portion around the second magnetic core, and the winding direction is opposite to the first coil portion. The connecting conductor is formed by the conductor for connecting the first coil portion and the second coil. unit. Further, when the length of the coil axis direction of the antenna coil is A, and the distance between the first magnetic body core and the second magnetic core is B, the antenna coil has a better effect if it satisfies 〇·7Α-Β-〇·5Α. . Further, preferably, the first magnetic core is the same as the second magnetic core shape. Further, preferably, the first magnetic core and the second magnetic core are arranged side by side in the same direction as the main surface. Further, at least one of the first magnetic cores located on the outer sides of the coil axis direction and the end portions of the second magnetic cores is connected to the magnetic core. Further, the number of coil windings of the coil portion and the second coil portion of the brother 1 may be the same or different from each other. Further, it is also possible to form two or more connection conductors (connecting the second coil portion and the second coil portion). ~ Further, an electrode can be formed on one of the main faces of the antenna coil. Further, the third magnetic core may be wound, and the third magnetic core is connected to the first magnetic core and the second magnetic core, and is orthogonal to the second magnetic core and the second magnetic core. The cross-sectional area of the direction is 7 200805794 which is smaller than the first magnetic core and the second magnetic core. Further, the circuit board of the substrate assembly antenna coil having the above-described configuration has a length in the coil axis direction of the substrate assembly antenna coil X and an imaginary line (the antenna coil for the substrate assembly in the coil axis direction) When the center line is projected on the circuit board and the distance between the two points on the outer circumference of the circuit board is γ, it is preferable to satisfy Y - X - 0.8Y. Further, the two intersections of the imaginary line and the coil axis of the substrate assembly _ the end face are x1, x2, and the imaginary line is close to the two intersections of the outer periphery of the circuit board. The intersection is yi, close to χ2 3 and the point is 3"2, the distance between xl and yl is Dl, the distance between χ2 and y2 is " D2, preferably D1=D2. Further, it is preferable that the antenna coil for the substrate assembly is mounted on the circuit board so as to have a gap with the circuit board, and the antenna coil has the electrode formed on a surface facing the circuit board. According to the above configuration, the present invention can attain the following effects. φ The first magnetic body core and the second magnetic core are wound around the flexible substrate, and the substrate coil antenna having the first coil portion and the second coil portion is configured to be formed in the first coil portion and the second coil portion. Since the area of the non-winding portion is kept constant, it is possible to realize an antenna coil having a predetermined antenna sensitivity without being affected by the substrate mounting method. Further, the antenna device for arranging the antenna coil has a length in the coil axis direction of the antenna coil X, an imaginary line (the center line of the magnetic core in the coil axis direction is projected on the circuit board), and two intersections on the outer circumference of the circuit board. When the distance between the points is Y, the antenna coil is constructed in such a manner as to satisfy the YX-0.8Y, 8 200805794 % Thereby, the magnetic resistance at the end of the antenna coil (located in the direction in which the magnetic core of the first magnetic body and the second magnetic core are arranged side by side) The size is reduced, so that the magnetic collecting effect of the antenna coil can be improved, and an antenna device having high communication sensitivity is constructed. [Embodiment] (First Embodiment) A structure of an antenna coil for a substrate assembly according to an i-th embodiment will be described with reference to Figs. 1 and 2 . Fig. 1 is a perspective view and a plan view showing the structure of an antenna coil for a substrate assembly according to a second embodiment. Fig. 2 is a plan view showing the structure of a flexible substrate wound around a magnetic core. As shown in Fig. 1, the antenna coil 2 of the first embodiment includes a first magnetic core 4a, a second magnetic core 4b, and a wound around the i-th magnetic core 4a and the second magnetic core 4b. A piece of soft substrate $. Further, although the flexible substrate 5 is shown by a single line, it actually has a thickness of about 1 〇 #瓜. For example, the first magnetic core 4a and the second magnetic core 4b are each made of φ, for example, a rectangle whose main surface is 8 mm in the lateral direction and 10 mm in the longitudinal direction, and a ferrite iron having a thickness of Umm is used as (4). The first and second magnetic cores ^, servant: = the sides in the lateral direction of the surface are on the same straight line, and the distance between the ith magnetic core and the second magnetic body iron, o 4b is 24 mm. The gap between the first magnetic core 4a and the second magnetic core 4b formed in this manner is referred to as a non-winding portion. Further, a conductor is formed on the surface of the flexible substrate 5, and the first magnetic core 4a and the second magnetic core 4b are formed around the first magnetic core 4a and the second coil portion 2b, respectively.帛i coil part 2a, is tied at 9 200805794
第1磁性體鐵心4a之橫方向端部中，在位於天線線圈外侧 之端部磁性體鐵心露出1 min，在位於内側之端部露出2mm 之方式以1mm間距捲繞6圈。第2線圈部2b亦相同。如 此構成之第1線圈部2a與第2線圈部2b之線圈轴係與第 1磁性體鐵心4a與第2磁性體鐵心4b之橫方向平行。又， 第1線圈部2a與第2線圈部2b之線圈捲繞方向相反。再 者’第1線圈部2a與第2線圈部2b係藉由連接導體6相 連接，整體形成為1組線圈。 此處’第2圖係顯示捲繞於磁性體鐵心周圍前之軟性 基板構造。軟性基板5之俯視形狀呈具有開口部8之〕字 狀。藉由設置開口部8，當如後述般彎曲軟性基板時，順 著第1磁性體鐵心4a與第2磁性體鐵心4b之形狀，第1 磁性體鐵心4a與第2磁性體鐵心4b並排方向之天線線圈 2之中央部成為窄縮之形狀。又，在與軟性基板5之形成 開口部8之側面相對向之側面，形成有用以連接於輸出入 端子之突出部9。材質係聚醯亞胺薄膜。此外，亦能使用 玻璃環氧薄膜之樹脂膜等能彎曲之電氣絕緣膜。在軟性基 板5之表面，透過開口冑8在短邊方向之左右兩端形成各 V骽雖乂早線顯不，但實際上係以寬度〇·5_ 〜丄匪、厚度0.05mm〜〇.lmm形成。帛2圖之俯視圖中， 各導體雖與軟性基板5之下端接觸，但未與上端接觸。又， 左右各6條之導體中，蛊龆 /、開淖8相鄰之2條導體係在開 口部8上部藉由連接導體 7相連接。又，位於軟性基板兩 端之2條導體係形成至突 出邛 之、部為止。此外，導體 200805794 能藉由網版印刷等形成。如上述形成之軟性…，係以 導體上端部與導體下端部重疊的方式_ !磁性體鐵心 與弟2磁性體鐵心，以形志莫辦 ^ ❿戍泠體的面為内側之方式彎曲， 例如點u與點12以焊接形成電氣連 接。藉此將導體形成為一連串之線圈。In the lateral end portion of the first magnetic core 4a, the magnetic core was exposed for 1 minute at the end portion located outside the antenna coil, and 6 turns at a pitch of 1 mm so as to expose 2 mm at the inner end portion. The second coil portion 2b is also the same. The coil axis of the first coil portion 2a and the second coil portion 2b thus configured is parallel to the lateral direction of the first magnetic core 4a and the second magnetic core 4b. Further, the coil winding direction of the first coil portion 2a and the second coil portion 2b is opposite. Further, the first coil portion 2a and the second coil portion 2b are connected by the connecting conductor 6, and are integrally formed as a single coil. Here, the second figure shows the structure of a flexible substrate before being wound around the periphery of the magnetic core. The flexible substrate 5 has a shape in a plan view having an opening portion 8. When the flexible substrate is bent as will be described later, the first magnetic core 4a and the second magnetic core 4b are arranged in parallel along the shape of the first magnetic core 4a and the second magnetic core 4b. The central portion of the antenna coil 2 has a narrowed shape. Further, a protruding portion 9 for connecting to the input/output terminal is formed on a side surface of the flexible substrate 5 opposite to the side surface on which the opening portion 8 is formed. The material is a polyimide film. Further, a bendable electrical insulating film such as a resin film of a glass epoxy film can also be used. On the surface of the flexible substrate 5, the V 骽 is formed in the right and left ends of the short-side direction through the opening 胄8, although the early line is not displayed, but actually the width 〇·5_ 丄匪, the thickness is 0.05 mm 〇.lmm form. In the plan view of Fig. 2, the conductors are in contact with the lower end of the flexible substrate 5, but are not in contact with the upper end. Further, of the six conductors on the left and right sides, the two guide systems adjacent to the 蛊龆 / and the opening 8 are connected to each other at the upper portion of the opening portion 8 by the connecting conductor 7. Further, two guide systems located at both ends of the flexible substrate are formed until the portions protruding from the ridge. Further, the conductor 200805794 can be formed by screen printing or the like. The softness formed as described above is such that the upper end of the conductor overlaps with the lower end of the conductor _ ! The magnetic core and the second magnetic core are bent in such a way that the surface of the body is inside, for example Point u and point 12 are soldered to form an electrical connection. Thereby the conductor is formed into a series of coils.
在上述構成之天線線圈2中，當與rfid系統用之讀 寫進行通訊日守，來自讀寫器之磁通進入天線線圈2之非 捲繞部。因此，未形成導體之非捲繞部必須設得充分的大。 而，由於進入非捲繞部之磁通必須通過第〗磁性體鐵心 4a與第2磁性體鐵心4b，因此亦不可是因非捲繞部過大而 使磁通不易被導引至磁性體鐵心之構造。第i實施形態中， 由於第1磁性體鐵心4a與第2磁性體鐵心4b係並排設置， 而以一片軟性基板5捲繞該等，因此第1磁性體鐵心4a與 弟2磁性體鐵心4b之位置關係保持一定。亦即，當將天 線線圈構裝於電路基板時，天線線圈之設置部位係依據電 路基板之構造而變更，藉此天線線圈之天線靈敏度不會有 變差的可能性，能實現具有一定靈敏度之天線線圈。因此， 不受構裝於電路基板之方法影響，能形成具有所欲天線靈 敏度之天線線圈。 又，由於僅需設置一體之天線線圈2即可完成構裝， 因此構裝非常容易。 此處，關於設於第1磁性體鐵心與第2磁性體鐵心間 之非捲繞部之大小，依據後述實驗例所示之發明人之研 究’得知以下事項。亦即，參照第1(B)圖，當設天線線圈 200805794 2之線圈軸方向長度為 _ μη ^ 弟1磁性體鐵心與第2磁性I# 鐵心間之距離為β時篇足 圧體 與來自讀寫H之磁g (i 天線線圈 (興天線線圈之線圈轴方向正交之磁 通）：好交鏈，能進行高靈敏度之通訊。 弟1實施形態中，以裳】 奶、、4h ^ 磁性體鐵心4a與第2磁性體 鐵〜朴間之距離B為24 篮 斤。 之方式，在第1磁性體鐵心4a 與弟2磁性體鐵心4b之門< 1 _ 之間k有線圈導體之非捲繞部。若In the antenna coil 2 having the above configuration, when the communication is performed with the reading and writing of the rfid system, the magnetic flux from the reader/writer enters the non-winding portion of the antenna coil 2. Therefore, the non-winding portion in which the conductor is not formed must be sufficiently large. On the other hand, since the magnetic flux entering the non-winding portion must pass through the magnetic core 4a and the second magnetic core 4b, the magnetic flux cannot be easily guided to the magnetic core due to the excessively large winding portion. structure. In the first embodiment, the first magnetic core 4a and the second magnetic core 4b are arranged side by side, and the flexible substrate 5 is wound around the first magnetic core 4a, so that the first magnetic core 4a and the second magnetic core 4b are The positional relationship remains constant. In other words, when the antenna coil is mounted on the circuit board, the installation position of the antenna coil is changed according to the structure of the circuit board, whereby the antenna sensitivity of the antenna coil does not deteriorate, and a certain sensitivity can be realized. Antenna coil. Therefore, it is possible to form an antenna coil having the desired antenna sensitivity without being affected by the method of mounting on the circuit board. Moreover, since it is only necessary to provide an integrated antenna coil 2 to complete the assembly, the mounting is very easy. Here, regarding the size of the non-winding portion provided between the first magnetic core and the second magnetic core, the following matters are known from the research of the inventors shown in the experimental examples described later. That is, referring to FIG. 1(B), when the length of the coil axis direction of the antenna coil 200805794 2 is _μη ^ and the distance between the magnetic core of the 1st magnetic core and the core of the second magnetic I# is β, the foot and the body come from Read and write H magnetic g (i Antenna coil (the magnetic flux of the antenna coil in the direction of the coil axis is orthogonal): Good cross-linking, can communicate with high sensitivity. In the embodiment 1 of the brother, the baby, milk, 4h ^ The distance B between the magnetic core 4a and the second magnetic body iron is 24 baskets. In the manner, there is a coil conductor between the first magnetic core 4a and the second magnetic core 4b < 1 _ Non-winding part.
將弟1貫施形態應用於上述 ^ L 上述不專式，可知能滿足不等式。 因此，天線線圈2與來自婧宜 一不 术自項寫益之磁通良好交鏈，能進行 南靈敏度的通訊。 又，本實施形態中，在第t絲从胁他 牡弟1磁性體鐵心4a與第2磁性 體鐵心4b橫方向之端部中， Ύ 在較位於天線線圈2外侧之 端部為内側之端部形成有篦丨給 7取畀弟1線圈部2a與第2線圈部2b， 以使較多磁性體鐵心、4a，4b露出。由於藉由此構成，能在 磁通集中之天線線ffi 2端部形成線圈，因此藉由進入第！ 磁性體鐵^與第2雜體鐵心、4b之磁通，形成更 感應電壓之構造。 又，當俯視時，軟性基板5並非覆蓋非捲繞部整面， 而是天線線圈2在線圈軸方向之中央部形成窄縮的構造。 藉此，由於天線線® 2與設置天線_ 2之電路基板之接 觸面積減少’因此容易將天線線_ 2之設置部位設於電路 基板上。又，在天線線圈2中央部窄縮的部分，由於設置 於電路基板之其他物品亦可突出’因此構裝天線線圈2之 電路基板1之設計上之自由度增加。 12 200805794 再者，由於天線線圈2中，構成天線線圈2之第i磁 性體鐵心4a與第2磁性體鐵心4b係分開形成，因此，與 以一體之磁性體鐵心形成、且具有和天線線圈2之全長相 同長度的天線線圈相較，係一不易因來自外部之衝擊而碎 裂之構造。Applying the mode 1 to the above-mentioned non-specialized form, it can be known that the inequality can be satisfied. Therefore, the antenna coil 2 is well interlinked with the magnetic flux from Changi, which can be used for self-interest, and can communicate with the south sensitivity. Further, in the present embodiment, the end portion of the t-th wire from the side of the magnetic core 4a of the Vitamin 1 and the second magnetic core 4b in the lateral direction is the inner end of the end portion located outside the antenna coil 2 In the portion, the coil portion 2a and the second coil portion 2b are formed so as to expose a large number of magnetic cores 4a and 4b. With this configuration, the coil can be formed at the end of the antenna line ffi 2 where the magnetic flux is concentrated, so by entering the first! The magnetic body iron and the magnetic flux of the second body core and 4b form a structure in which a voltage is induced. Moreover, in the plan view, the flexible substrate 5 does not cover the entire surface of the non-winding portion, but the antenna coil 2 has a narrowed structure at the center portion in the coil axis direction. Thereby, since the contact area between the antenna line ® 2 and the circuit board on which the antenna _ 2 is provided is reduced, it is easy to provide the portion where the antenna line _ 2 is placed on the circuit board. Further, in the portion where the center portion of the antenna coil 2 is narrowed, other articles provided on the circuit board can be protruded. Therefore, the degree of freedom in designing the circuit board 1 on which the antenna coil 2 is mounted is increased. 12 200805794 In the antenna coil 2, the i-th magnetic core 4a constituting the antenna coil 2 is formed separately from the second magnetic core 4b, and therefore, it is formed integrally with the magnetic core and has the antenna coil 2 Compared with the antenna coil of the same length and the same length, it is a structure that is not easily broken by an external impact.
又，當形成天線線圈2時，由於將軟性基板5以形成 有導體的面為背面加以彎曲，因此在天線線圈2之表面未 形成導體。因此，形成導體不易剝離之構造。此外，亦能 將庠人性基板5以形成有導體之面為表面加以彎曲。此時， 由於权性基板係非常薄之構造，因此即使彎曲軟性基板而 重豐點彼此間未黏合，亦能透過軟性基板將該等焊接，藉 此形成電氣連接。 由於本實施形態之天線線圈2之第1磁性體鐵心4&與 第2磁性體鐵心4b係同一形狀、同一尺寸，因此能使進 入各磁性體鐵心之磁通相等。又，由於第！線圈部h與第 2線圈部2b之線圈捲繞數與線圈軸一致，因此能使各線圈 部所感應之電壓相等。 此外，第1實施形態中，雖然第i磁性體鐵心4a與第 2磁性體鐵心4b係作成長方體，但本發明並不限於該實施 1磁性體鐵心與 1磁性體鐵心與 形態，亦可係三角柱或圓柱。又，即使第 弟2磁性體鐵心大小不同亦可。當使用第 面積較第1磁性體鐵心為大的第2磁性體鐵心時，第2線 圈部所感應之電壓較第丨線圈部所感應之電壓為大。藉由 如此構成，不僅與天線線圈之線圈轴方向正交之磁通，與 13 200805794 天線線圈之線圈軸方向平行之磁通亦能交鏈。亦即，與線 圈軸方向平行之磁通通過天線線圈時，雖在第1線圈部與 第2線圈部感應反方向之電壓，但由於第〗磁性體鐵心與 第2磁性體鐵心之大小不同，因此各電壓之大小不同，無 法完全抵消。因此，即使與天線線圈之線圈轴方向平行之 磁通進入，亦能藉此進行通訊。 以線圈之匝數不同之方式構成第i線圈部與第2線圈 部時亦能獲得上述效果。亦即，由於第1線圈部與第2線 圈部之匝數不同，因此即使在第1磁性體鐵心與第2磁性 體鐵心通過同量之磁通，所感應之電壓大小亦不同，不會 產生反方向電壓彼此抵消之情形。 此外，第1實施形態中，雖使第1線圈部2a與第2線 圈部2b之線圈軸一致，但即使線圈轴不完全一致，亦能 將與天線線圈之線圈軸方向正交之磁通導引至各線圈部。 又，第1實施形態中，在軟性基板5設有用以連接於輸出 入端子之突出部9，但從第！線圈部、第2線圈部至輸出 入端子之連接並不限於該實施形態。 (第2實施形態） 參照第3圖及第4圖說明第2實施形態之基板構裝用 天線線圈構裝於電路基板之天線裝置之構造。第3圖係顯 示構裝弟2貫加形悲之基板構裝用天線線圈之天線裝置之 構造圖。（A)係立體圖、（B)係俯視圖。第4圖係顯示將第 3圖所示之天線裝置遮住RFID系統用之讀寫器狀態之磁通 路徑之示意圖。 200805794 如第3(A)圖所示，第2實施形態之天線裝置23中， 在電路基板21構裝天線線圈22。電路基板21具有例如長 邊方向長度為90mm、短邊方向長度為4〇mm之矩形主面。 天線線圈22之橫方向長度與電路基板2 1之短邊方向長度 一致’以天線線圈22之橫方向端部與電路基板2 1之短邊 方向端部重疊之方式構裝天線線圈22。天線線圈22係使 用黏著劑固定於電路基板2 i。 _ 由於天線線圈22係以與第1實施形態相同之方式形 成，因此此處省略其說明，第2實施形態中，未設置用以 連接於輸出入端子之突出部，形成於軟性基板之導體端部 與形成於電路基板之導體端部係藉由焊接來連接。在電路 基板21上，電路基板21之主面與第丨、第2磁性體鐵心 ，24b之主面相對向，第}、第2磁性體鐵心Μ' 24b 之k方向的邊係在同一直線上，且設置成第1、第2磁性 體鐵〜24a，24b之橫方向與電路基板21之短邊方向平行。 _ 又，以下，說明將天線線圈22構裝於電路基板21所 獲得之效果。 第4圖中’圖中之Φ係顯示來自讀寫器之磁通。通常， 2線裝置裝載於行動終端時，係以行動終端之主面與天線 衣置之電路基板平行之方式設置天線裝置。又，行動終端 之使用者將仃動終端之主面以與讀寫器之主面平行之方式 將其遮住。第4 m > 圖係顯示採用此種使用形態時，來自讀寫 二2〇之料路捏與天線裝置之截面構造之圖。由第4、圖 了知’來自Ί買宫哭 、…、為20之磁通Φ進入設於天線線圈22之第1 15 200805794 磁性體鐵心24a與第2磁性體鐵心24b間之線圈導體之非 捲繞部。進入之磁通其進路被存在於天線線圈22背後之 電路基板21遮蔽，使行進方向彎曲大致9〇。。接著，通 過第1磁性體鐵心24a與第2磁性體鐵心24b。由於來自 讀寫器之磁通φ係採取此種進路，因此即使天線線圈22之 線圈轴與來自讀寫器20之磁通φ正交，天線線圈22亦能 捕捉來自讀寫器20之磁通φ進行交鏈，引起電磁感應。特 _ 別是本實施形態中，由於第1線圈部22a與第2線圈部22b 分別以第1磁性體鐵心24a與第2磁性體鐵心24b為中心 形成’因此形成磁通通過各線圈部之線圈軸的構成。是以， 藉由磁通通過第1磁性體鐵心24a與第2磁性體鐵心24b 而容易感應電壓。 此處’來自讀寫器之磁通φ通過第1磁性體鐵心24a與 第2磁性體鐵心24b，藉此磁通通過第1線圈部22a與第2 線圈部22b之線圈軸，在各線圈部產生電壓。由於磁通係 _ 進入第1線圈部22a與第2線圈部22b之間，因此在各線 圈部之線圈轴會通過反方向之磁通。然而，由於第丨線圈 部22a與第2線圈部22b之線圈捲繞方向相反，因此會在 同一方向產生電壓，即使第i線圈部22a與第2線圈部22b 係藉由連接導體27來連接，亦不會抵消電壓。 本貫施形悲之天線裝置23，如第3(B)圖所示，當設電 路基板21之主面之短邊方向長度為χ、天線線圈22之線 圈軸方向長度為Y時，係將天線線圈22構裝成χ==γ。依 發明人之見解’藉由將天線線圈22以滿足〇·8χ之 16 200805794 方式設置於電路基板21，即能使天線線圈22之線圈轴方 向之端部接近電路基板21端部，減小天線線圈22之線圈 轴方向端部之磁阻，因此能提高天線線圈之集磁力，構成 具有高通訊靈敏度之天線裝置。第2實施形態滿足上述不 等式。因此，能與來自讀寫器之磁通良好交鏈。 又，本實施形態中，係將天線線圈22設置成天線線圈 22之線圈軸方向端部與電路基板21之短邊方向端部彼此 重疊。亦即，將線圈轴方向之天線線圈22之中心線投影 參 至電路基板21上的假想線、與天線線圈22之線圈軸方向 端面之2個交叉點分別設為X1，χ2、該假想線與電路基板 21外周之2個交叉點中接近χΐ之交叉點為yi、接近χ2 之交叉點為y2時，xl與yl之距離係與Χ2與y2之距離相 等。藉此，能使天線線圈22之線圈轴方向端部之磁阻相 等，且能使通過第1磁性體鐵心24a與第2磁性體鐵心24b 之磁通相等。 _ 又，第2實施形態之天線裝置23係藉由黏著劑固定天 線線圈22與電路基板21，但天線線圈構裝於電路基板之 方法並不限於此。 (第3實施形態） 第3實施形態之基板構裝用天線線圈中，磁性體鐵心 連接於位在線圈轴方向兩外側之第1磁性體鐵心與第2磁 性體鐵心之端部。關於未記載於以下實施例之天線線圈之 構成’係依據第1實施形態構成。然而，並未設置用以連 接於輸出入端子之突出部。 17 200805794 (實施例1) 第5圖係顯示延伸於與天線線圈82之線圈轴方向正交 之方向之磁性體鐵心88a，88b形成在第1磁性體鐵心84a 與第2磁性體鐵心84b兩端之天線線圈82的構成。連接 之磁性體鐵心88a，88b其縱方向長度為i〇mm、橫方向長 度為1.5mm、厚度方向長度為2.3mm。又，磁性體鐵心88a 係黏著在第1磁性體鐵心84a於線圈轴方向之端面。又， 磁性體鐵心88a之縱方向的邊係與第1磁性體鐵心84a之 縱方向的邊重疊，磁性體鐵心88b之橫方向的邊係以與第 1磁性體鐵心84a之橫方向的邊並排於同一直線上之方式 配置。同樣地，在第2磁性體鐵心84b之端面亦黏著磁性 體鐵心8 8 b。 藉由如此構成，將實施例1之天線線圈82構裝於長方 體狀之電路基板時，由於能順著電路基板之形狀形成天線 線圈，因此能將由天線線圈與電路基板構成之天線裝置小 型化。 (實施例2) 弟6圖係顯不在天線線圈92之線圈轴方向端面連接圓 弧狀之磁性體鐵心98a，98b之天線線圈92之構成。連接 於第1磁性體鐵心94a之磁性體鐵心98a之端面具有與第 1磁性體鐵心之線圈轴方向之端面相同大小及形狀，兩者 以完全重疊之方式黏著。同樣地，在第2磁性體鐵心94b 之端面亦黏著磁性體鐵心98b。 藉由如此構成，由於能進一步增大磁通放射面之面積， 18 200805794 因此能進一步提高天線靈敏度。 以下，說明以上述第1、篦？每尬加α ^ I乐i弟2貝靶例所不方式構成基 板構裝用天線線圈所能獲得之效果。進入第i磁性體鐵心 與第2磁性體鐵心内侧側面之磁通係通過第〗線圈部與第 2線圈部。進一步的，通過連接於第丨磁性體鐵心及第2 磁性體鐵心之磁性體鐵心，從侧面朝空間射出。本實施形 態中’由於在天線線圈之端部形成磁性體鐵心，且磁通朝 空間射出之磁性體鐵心之侧面形成的寬廣，因此在天線線 _ 圈之端部磁阻變小。藉此，進入天線線圈通過第}線圈部 與第2線圈部而引起電磁感應之磁通增加，能進行更高靈 敏度之通訊。 以上之效果並不限於上述第丨、第2實施例，只要磁 性體鐵心連接於位於天線線圈之線圈轴方向兩外侧之第i 磁性體鐵心與第2磁性體鐵心之端部即可。此外，連接不 僅包括在第1磁性體鐵心、第2磁性體鐵心端部附加磁性 體鐵心之構造，亦包含與第1磁性體鐵心、第2磁性體鐵 _ 心一體形成之構造、或彎曲第1磁性體鐵心與第2磁性體 鐵心所形成之構造。 (第4實施形態） 構裝第4實施形態之基板構裝用天線線圈之天線裝置 中，第1磁性體鐵心與第2磁性體鐵心係藉由第3磁性體 鐵心來連接。設置第3磁性體鐵心時，關於與第1磁性體 鐵心及第2磁性體鐵心之縱方向平行方向之截面積，第3 磁性體鐵心須小於第1磁性體鐵心與第2磁性體鐵心。此 19 200805794 外，以下實施例中未記載之天線線圈及電路基板之構成， 係依據第1實施形態及第2實施形態構成。因此，由於本 κ方e开> 態之天線線圈係在第1磁性體鐵心與第2磁性體鐵 心捲繞軟性基板而構成，因此形成於第丨線圈部與第2線 圈部間之非捲繞部之面積能保持一定。因此，能實現不受 構裝於電路基板之方法影響且具有一定天線靈敏度之天線 線圈。又，本實施形態之天線裝置，設天線線圈之線圈軸 方向長度為X、假想線（使線圈軸方向之磁性體鐵心之中心 線才又影至電路基板）與電路基板外周之兩個交叉點之距離為 Y時’以滿足Υ-Χ-〇·8Υ之方式將天線線圈構裝於電路 基板’因此在位於第1磁性體鐵心與第2磁性體鐵心並排 方向之天線線圈之端部磁阻變小，能提高天線線圈之集磁 效果’且能發揮作為具有高通訊靈敏度之天線裝置之功 能。 (實施例1) 第7圖係顯示使用第3磁性體鐵心34c之厚度較第1 磁性體鐵心34a與第2磁性體鐵心34b之厚度為薄之天線 線圈32之天線裝置33之構造之圖。第7圖中，當將與電 路基板31相對向之各磁性體鐵心34a，34b，34c之主面當作 第1主面’將第！主面之相反主面當作第2主面時，第！、 第2、第3磁性體鐵心34a，34b，34c之第2主面係位於同 一面上。另一方面，第1、第2磁性體鐵心34a，34b之第 1主面雖位於同一面上，但第3磁性體鐵心34c之第1主 面係位於不同的面上，第3磁性體鐵心34c之厚度形成較 200805794 薄，藉此在第3磁性體鐵心34c與電路基板3 1之間產生間 隙。藉由如此構成，在第3磁性體鐵心34c與電路基板31 之間形成間隙，藉此能有效利用所產生之空間。 (實施例2) 第8圖係顯示使用第3磁性體鐵心44c之縱方向長度 較第1磁性體鐵心44a與第2磁性體鐵心44b之縱方向長 度短之天線線圈42之天線裝置43之構造之圖。第8圖中， _ 弟1、第2、第3磁性體鐵心44a，44b，44c之橫方向側面 中一方皆位於同一面上。第1、第2磁性體鐵心44a，44b 之另一側面雖位於同一面上，但第3磁性體鐵心44c之另 一側面係位於不同的面上。使第3磁性體鐵心44c之縱方 向長度較第1、第2磁性體鐵心44a，44b之縱方向長度為 短’藉此形成天線線圈42之橫方向之中央部窄縮之構造。 藉此，由於天線線圈42與電路基板41之接觸面積減少， 因此容易將天線線圈42之設置部位設於電路基板41上。 _ 又，天線線圈42之中央部窄縮部分，設置於電路基板41 之其他元件亦可突出，因此構裝天線線圈42之電路基板41 之設計上之自由度增加。 (實施例3) 第9圖係顯示使用第3磁性體鐵心54c之縱方向長度 較第1磁性體鐵心54a與第2磁性體鐵心54b之縱方向長 度為短之天線線圈52之天線裝置53之構造之圖。第3磁 性體鐵心54c之橫方向之兩侧面，與第1磁性體鐵心54a 與第2磁性體鐵心54b之側面位於不同之面。使第3磁性 21 200805794 體鐵心54〇之縱方向長度較第！、第2磁性體鐵心54a，54b 之縱方向長度為短，藉此形成天線線圈52之橫方向之中 央部窄縮之構造。藉此，由於天線線圈52與電路基板51 之接觸面積減少，因此容易將天線線圈52之設置部位設 於電路基板5 1上。又，天線線圈52之中央部窄縮部分， 設置於電路基板51之其他元件亦可突出，因此構裝天線 線圈52之電路基板51之設計上之自由度增加。 (實施例4) 弟10圖係顯示具備厚度較第i磁性體鐵心64a與第2 磁性體鐵心64b為薄，且橫方向之長度亦較第i磁性體鐵 心64a與第2磁性體鐵心64b為短之第3磁性體鐵心6乜 之天線線圈62之構造之圖。藉由如此構成，在第3磁性 體鐵心64c與電路基板61之間形成間隙，能有效利用所產 生之空間。又，形成天線線圈62之橫方向之中央部窄縮 之構造。藉此，由於天線線圈62與電路基板61之接觸面 φ 積減少，因此容易將天線線圈62之設置部位設於電路基 板61上，又，天線線圈62之中央部窄縮部分，設置於電 路基板之其他元件亦可突出，因此構裝天線線圈Q之 電路基板61之設計上之自由度增加。 藉由以上實施例1〜4般之構成，形成第3磁性體鐵心 益在非捲繞部設有磁性體鐵心，因此天線線圈之集磁效果 提高。因此，天線靈敏度提高。又，關於與第丨磁性體鐵 心及第2磁性體鐵心之縱方向平行方向之截面積，由於第 3磁性體鐵心較第1磁性體鐵心與第2磁性體鐵心為小， 22 200805794 因此能縮小第3磁性體鐵心與電路基板接觸之面積，形成 容易將天線線圈構裝於電路基板之構造。此外，以上之實 施形態中’雖形成第1磁性體鐵心與第3磁性體鐵心黏著、 第2磁性體鐵心與第3磁性體鐵心黏著之構成，但即使該 等未黏著’只要以磁性方式相連接，即能提高天線線圈之 集磁效果。再者，亦可使第1磁性體鐵心、第2磁性體鐵 心、與第3磁性體鐵心一體成型。 (實驗例） 第11圖及第12圖係顯示使非捲繞部之長度變化時、 天線裝置與來自讀寫器之磁通之耦合係數變化的圖。第1 i 圖係顯示第1實驗之結果，第12圖係顯示第2實驗之結 果。第11圖及第12圖中，h係顯示第1磁性體鐵心與第 2磁性體鐵心間之距離相對於天線線圈之線圈轴方向之長 度的比例。 第1實驗中，係使用具有橫方向為4〇mm、縱方向為Further, when the antenna coil 2 is formed, since the surface of the flexible substrate 5 on which the conductor is formed is bent as the back surface, no conductor is formed on the surface of the antenna coil 2. Therefore, a structure in which the conductor is not easily peeled off is formed. Further, it is also possible to bend the human substrate 5 with the surface on which the conductor is formed. In this case, since the weight substrate is a very thin structure, even if the flexible substrate is bent and the heavy points are not bonded to each other, the solder can be soldered through the flexible substrate, thereby forming an electrical connection. Since the first magnetic core 4& of the antenna coil 2 of the present embodiment has the same shape and the same size as the second magnetic core 4b, the magnetic fluxes entering the respective magnetic cores can be made equal. Also, due to the first! Since the number of coil windings of the coil portion h and the second coil portion 2b coincides with the coil axis, the voltages induced by the respective coil portions can be made equal. In the first embodiment, the i-th magnetic core 4a and the second magnetic core 4b are formed as a rectangular parallelepiped. However, the present invention is not limited to the magnetic core and the magnetic core and the configuration, and may be a triangular prism. Or a cylinder. Further, even if the size of the magnetic core of the second brother 2 is different. When the second magnetic core having the first area larger than the first magnetic core is used, the voltage induced by the second coil portion is larger than the voltage induced by the second coil portion. According to this configuration, not only the magnetic flux orthogonal to the coil axis direction of the antenna coil but also the magnetic flux parallel to the coil axis direction of the antenna coil of 200805794 can be interlinked. In other words, when the magnetic flux parallel to the coil axis direction passes through the antenna coil, the voltage in the opposite direction is induced in the first coil portion and the second coil portion, but the size of the magnetic core and the second magnetic core are different. Therefore, the magnitude of each voltage is different and cannot be completely cancelled. Therefore, communication can be performed even if a magnetic flux parallel to the coil axis direction of the antenna coil enters. The above effects can also be obtained when the i-th coil portion and the second coil portion are configured such that the number of turns of the coil is different. In other words, since the number of turns of the first coil portion and the second coil portion is different, even if the first magnetic core and the second magnetic core pass the same amount of magnetic flux, the magnitude of the induced voltage is different and does not occur. The situation in which the opposite voltages cancel each other out. Further, in the first embodiment, the coil axes of the first coil portion 2a and the second coil portion 2b are aligned, but the magnetic flux guide orthogonal to the coil axis direction of the antenna coil can be obtained even if the coil axes are not completely aligned. Lead to each coil part. Further, in the first embodiment, the flexible substrate 5 is provided with the protruding portion 9 for connection to the output terminal, but from the first! The connection between the coil portion and the second coil portion to the output terminal is not limited to this embodiment. (Second Embodiment) A structure of an antenna device in which a substrate assembly antenna coil of a second embodiment is mounted on a circuit board will be described with reference to Figs. 3 and 4 . Fig. 3 is a structural view showing an antenna device of an antenna coil for a substrate assembly in which the structure is formed. (A) is a perspective view, and (B) is a top view. Fig. 4 is a view showing a magnetic flux path in which the antenna device shown in Fig. 3 is shielded from the state of the reader/writer for the RFID system. 200805794 As shown in Fig. 3(A), in the antenna device 23 of the second embodiment, the antenna coil 22 is mounted on the circuit board 21. The circuit board 21 has, for example, a rectangular main surface having a length of 90 mm in the longitudinal direction and a length of 4 mm in the short-side direction. The length of the antenna coil 22 in the lateral direction coincides with the length in the short-side direction of the circuit board 21, and the antenna coil 22 is configured such that the end portion of the antenna coil 22 in the lateral direction overlaps with the end portion of the circuit board 21 in the short-side direction. The antenna coil 22 is fixed to the circuit board 2 i with an adhesive. Since the antenna coil 22 is formed in the same manner as in the first embodiment, the description thereof is omitted here. In the second embodiment, the protruding portion for connecting to the input/output terminal is not provided, and is formed on the conductor end of the flexible substrate. The portion is connected to the end of the conductor formed on the circuit board by soldering. On the circuit board 21, the main surface of the circuit board 21 faces the main faces of the second and second magnetic cores, 24b, and the sides of the second and second magnetic cores 24' 24b are on the same straight line. The lateral direction of the first and second magnetic irons 〜24a, 24b is set to be parallel to the short side direction of the circuit board 21. Further, the effect obtained by arranging the antenna coil 22 on the circuit board 21 will be described below. The Φ in the figure in Fig. 4 shows the magnetic flux from the reader. Usually, when the 2-wire device is mounted on the mobile terminal, the antenna device is disposed such that the main surface of the mobile terminal is parallel to the circuit substrate on which the antenna is placed. Further, the user of the mobile terminal will cover the main surface of the terminal so as to be parallel to the main surface of the reader. The 4th m > figure shows the cross-sectional structure of the material path pinch and antenna device from the read/write 2nd and 2nd. From the fourth and the figure, it is known that 'the crying from the Ί 宫 Palace, ..., the magnetic flux Φ of 20 enters the coil conductor of the first 15 200805794 between the magnetic core 24a and the second magnetic core 24b. Winding section. The incoming magnetic flux is shielded by the circuit substrate 21 existing behind the antenna coil 22, and the traveling direction is bent by approximately 9 turns. . Next, the first magnetic core 24a and the second magnetic core 24b pass through. Since the magnetic flux φ from the reader/writer takes such an approach, even if the coil axis of the antenna coil 22 is orthogonal to the magnetic flux φ from the reader/writer 20, the antenna coil 22 can capture the magnetic flux from the reader/writer 20. φ is interlinked, causing electromagnetic induction. In the present embodiment, the first coil portion 22a and the second coil portion 22b are formed around the first magnetic core 24a and the second magnetic core 24b, respectively, so that the magnetic flux is passed through the coils of the respective coil portions. The composition of the shaft. Therefore, the magnetic flux is easily induced by the first magnetic core 24a and the second magnetic core 24b. Here, the magnetic flux φ from the reader/writer passes through the first magnetic core 24a and the second magnetic core 24b, whereby the magnetic flux passes through the coil axes of the first coil portion 22a and the second coil portion 22b, and the coil portions are formed in the respective coil portions. Generate voltage. Since the magnetic flux system _ enters between the first coil portion 22a and the second coil portion 22b, the coil axis of each coil portion passes the magnetic flux in the opposite direction. However, since the coil winding direction of the second coil portion 22a and the second coil portion 22b is opposite to each other, a voltage is generated in the same direction, and even if the i-th coil portion 22a and the second coil portion 22b are connected by the connecting conductor 27, It will not offset the voltage. As shown in the third (B) diagram, when the length of the main surface of the circuit board 21 in the short-side direction is χ and the length of the antenna coil 22 in the coil axis direction is Y, the antenna device 23 will be The antenna coil 22 is constructed such that χ == γ. According to the inventor's opinion, by providing the antenna coil 22 to the circuit board 21 in such a manner as to meet the 2008·8χ16 200805794, the end portion of the antenna coil 22 in the coil axis direction can be brought close to the end of the circuit board 21, and the antenna is reduced. The magnetic resistance of the end portion of the coil 22 in the coil axis direction can increase the collective magnetic force of the antenna coil, and constitute an antenna device having high communication sensitivity. The second embodiment satisfies the above inequality. Therefore, it can be well interlinked with the magnetic flux from the reader. In the present embodiment, the antenna coil 22 is provided such that the end portions in the coil axis direction of the antenna coil 22 and the end portions in the short-side direction of the circuit board 21 overlap each other. In other words, the intersection of the imaginary line of the antenna coil 22 in the coil axis direction and the imaginary line on the circuit board 21 and the end face of the antenna coil 22 in the coil axis direction are respectively set to X1, χ2, and the imaginary line and When the intersection of the two intersections of the outer circumference of the circuit board 21 is close to χΐ, and the intersection of χ2 is y2, the distance between x1 and yl is equal to the distance between Χ2 and y2. Thereby, the magnetic resistance of the end portion of the antenna coil 22 in the coil axial direction can be made equal, and the magnetic flux passing through the first magnetic core 24a and the second magnetic core 24b can be made equal. Further, in the antenna device 23 of the second embodiment, the antenna coil 22 and the circuit board 21 are fixed by an adhesive, but the method of assembling the antenna coil to the circuit board is not limited thereto. (Third Embodiment) In the antenna coil for substrate assembly of the third embodiment, the magnetic core is connected to the end portions of the first magnetic core and the second magnetic core which are positioned outside the coil axis direction. The configuration of the antenna coil not described in the following embodiments is configured according to the first embodiment. However, the projection for connecting to the input/output terminal is not provided. 17 200805794 (Embodiment 1) FIG. 5 shows a magnetic core 88a extending in a direction orthogonal to the coil axis direction of the antenna coil 82, and 88b is formed at both ends of the first magnetic core 84a and the second magnetic core 84b. The configuration of the antenna coil 82. The connected magnetic cores 88a, 88b have a length in the longitudinal direction of i 〇 mm, a length in the lateral direction of 1.5 mm, and a length in the thickness direction of 2.3 mm. Further, the magnetic core 88a is adhered to the end surface of the first magnetic core 84a in the coil axis direction. Further, the side of the magnetic core 88a in the longitudinal direction overlaps with the side of the first magnetic core 84a in the longitudinal direction, and the side of the magnetic core 88b in the lateral direction is arranged side by side with the side of the first magnetic core 84a in the lateral direction. Configured on the same line. Similarly, the magnetic core 8 8 b is adhered to the end surface of the second magnetic core 84b. According to this configuration, when the antenna coil 82 of the first embodiment is mounted on a rectangular parallelepiped circuit board, the antenna coil can be formed along the shape of the circuit board, so that the antenna device including the antenna coil and the circuit board can be miniaturized. (Embodiment 2) The figure 6 shows a configuration in which the antenna coil 92 of the magnetic cores 98a and 98b having a circular arc shape is not connected to the end surface of the antenna coil 92 in the coil axis direction. The end faces of the magnetic cores 98a connected to the first magnetic core 94a have the same size and shape as the end faces of the first magnetic core in the coil axis direction, and are adhered to each other so as to completely overlap. Similarly, the magnetic core 98b is adhered to the end surface of the second magnetic core 94b. With such a configuration, since the area of the magnetic flux radiating surface can be further increased, 18 200805794 can further improve the antenna sensitivity. In the following, what is the first and the above? The effect of the antenna coil for the substrate assembly is obtained by the method of adding the α ^ I Lei 2 2 target. The magnetic flux that enters the i-th magnetic core and the inner side of the second magnetic core passes through the first coil portion and the second coil portion. Further, the magnetic core connected to the second magnetic core and the second magnetic core is emitted from the side surface toward the space. In the present embodiment, since the magnetic core is formed at the end portion of the antenna coil and the magnetic flux is formed to be broad toward the side surface of the magnetic core which is emitted from the space, the magnetic resistance at the end portion of the antenna wire loop becomes small. As a result, the magnetic flux that causes the electromagnetic induction to pass through the first coil portion and the second coil portion of the antenna coil increases, and communication with higher sensitivity can be performed. The above effects are not limited to the above-described second and second embodiments, and the magnetic core may be connected to the end portions of the i-th magnetic core and the second magnetic core located outside the coil axis direction of the antenna coil. Further, the connection includes not only the structure in which the magnetic core is added to the end of the first magnetic core or the second magnetic core, but also the structure in which the first magnetic core and the second magnetic iron are integrally formed, or the curved portion. A structure in which a magnetic core and a second magnetic core are formed. (Embodiment 4) In the antenna device of the antenna coil for substrate assembly of the fourth embodiment, the first magnetic core and the second magnetic core are connected by a third magnetic core. When the third magnetic core is provided, the third magnetic core must be smaller than the first magnetic core and the second magnetic core with respect to the cross-sectional area in the direction parallel to the longitudinal direction of the first magnetic core and the second magnetic core. In addition, the configuration of the antenna coil and the circuit board which are not described in the following embodiments is configured according to the first embodiment and the second embodiment. Therefore, since the antenna coil of the κ-e-open state is configured by winding the flexible substrate between the first magnetic core and the second magnetic core, the non-volume formed between the second coil portion and the second coil portion is formed. The area of the winding can be kept constant. Therefore, it is possible to realize an antenna coil which is not affected by the method of being mounted on a circuit board and which has a certain antenna sensitivity. Further, in the antenna device of the present embodiment, the length of the antenna coil in the coil axis direction is X, the imaginary line (the center line of the magnetic core in the coil axis direction is incident on the circuit board), and the intersection of the outer circumference of the circuit board. When the distance is Y, the antenna coil is mounted on the circuit board in such a manner as to satisfy the Υ-Χ-〇·8Υ, so the magnetic resistance at the end of the antenna coil located in the direction in which the first magnetic core and the second magnetic core are arranged side by side It becomes smaller, and it can improve the magnetic collecting effect of the antenna coil' and can function as an antenna device with high communication sensitivity. (Embodiment 1) Fig. 7 is a view showing a structure of an antenna device 33 in which the thickness of the third magnetic core 34c is smaller than the thickness of the first magnetic core 34a and the second magnetic core 34b. In Fig. 7, the main faces of the respective magnetic cores 34a, 34b, 34c facing the circuit board 31 are regarded as the first main surface ’! When the opposite main surface of the main surface is regarded as the second main surface, the first! The second main faces of the second and third magnetic cores 34a, 34b, 34c are located on the same surface. On the other hand, although the first main faces of the first and second magnetic cores 34a and 34b are located on the same surface, the first main faces of the third magnetic cores 34c are located on different faces, and the third magnetic core is provided. The thickness of 34c is thinner than that of 200805794, whereby a gap is formed between the third magnetic core 34c and the circuit board 31. According to this configuration, a gap is formed between the third magnetic core 34c and the circuit board 31, whereby the space generated can be utilized effectively. (Embodiment 2) FIG. 8 shows a structure of an antenna device 43 using an antenna coil 42 whose length in the longitudinal direction of the third magnetic core 44c is shorter than the longitudinal length of the first magnetic core 44a and the second magnetic core 44b. Picture. In Fig. 8, one of the lateral sides of the _1, 2nd, and 3rd magnetic cores 44a, 44b, 44c is located on the same plane. The other side surfaces of the first and second magnetic cores 44a and 44b are located on the same surface, but the other side of the third magnetic core 44c is located on a different surface. The length of the third magnetic core 44c in the longitudinal direction is shorter than the length of the first and second magnetic cores 44a and 44b in the longitudinal direction. Thus, the central portion of the antenna coil 42 in the lateral direction is narrowed. As a result, since the contact area between the antenna coil 42 and the circuit board 41 is reduced, it is easy to provide the installation portion of the antenna coil 42 on the circuit board 41. Further, since the central portion of the antenna coil 42 is narrowed and the other elements provided on the circuit board 41 are protruded, the degree of freedom in designing the circuit board 41 on which the antenna coil 42 is mounted is increased. (Embodiment 3) FIG. 9 shows an antenna device 53 of an antenna coil 52 in which the longitudinal length of the third magnetic core 54c is shorter than the longitudinal length of the first magnetic core 54a and the second magnetic core 54b. The map of the structure. The two side faces in the lateral direction of the third magnetic core 54c are located on the different surfaces from the side faces of the first magnetic core 54a and the second magnetic core 54b. The length of the third magnetic 21 200805794 body core 54〇 is the first! The length of the second magnetic cores 54a, 54b in the longitudinal direction is short, thereby forming a structure in which the central portion of the antenna coil 52 is narrowed in the lateral direction. Thereby, since the contact area between the antenna coil 52 and the circuit board 51 is reduced, it is easy to provide the portion where the antenna coil 52 is provided on the circuit board 51. Further, since the central portion of the antenna coil 52 is narrowed and the other elements provided on the circuit board 51 can be protruded, the degree of freedom in designing the circuit board 51 constituting the antenna coil 52 is increased. (Embodiment 4) The figure 10 shows that the thickness of the ith magnetic core 64a and the second magnetic core 64b is thinner than that of the ith magnetic core 64a and the second magnetic core 64b. A diagram showing the structure of the short antenna coil 62 of the third magnetic core 6乜. According to this configuration, a gap is formed between the third magnetic core 64c and the circuit board 61, and the space generated can be utilized effectively. Further, a structure in which the center portion of the antenna coil 62 in the lateral direction is narrowed is formed. As a result, since the contact surface φ product of the antenna coil 62 and the circuit board 61 is reduced, it is easy to provide the portion where the antenna coil 62 is provided on the circuit board 61, and the narrow portion of the center portion of the antenna coil 62 is provided on the circuit board. The other components can also be protruded, so that the degree of freedom in designing the circuit substrate 61 on which the antenna coil Q is constructed is increased. According to the configuration of the first to fourth embodiments, the magnetic body of the third magnetic core is provided in the non-winding portion, so that the magnetic collecting effect of the antenna coil is improved. Therefore, the antenna sensitivity is improved. In addition, the third magnetic core is smaller than the first magnetic core and the second magnetic core in the cross-sectional area parallel to the longitudinal direction of the second magnetic core and the second magnetic core, and 22 200805794 can be reduced. The area in which the third magnetic core is in contact with the circuit board forms a structure in which the antenna coil is easily attached to the circuit board. Further, in the above embodiment, the first magnetic core is bonded to the third magnetic core, and the second magnetic core and the third magnetic core are bonded to each other. However, even if they are not adhered, they are magnetically phased. Connection, which can improve the magnetic collecting effect of the antenna coil. Further, the first magnetic core, the second magnetic core, and the third magnetic core may be integrally molded. (Experimental Example) Figs. 11 and 12 are views showing changes in the coupling coefficient between the antenna device and the magnetic flux from the reader/writer when the length of the non-winding portion is changed. The 1st graph shows the results of the first experiment, and the 12th graph shows the results of the second experiment. In Figs. 11 and 12, h is a ratio showing the distance between the first magnetic core and the second magnetic core with respect to the length of the antenna coil in the coil axis direction. In the first experiment, the use was 4 mm in the lateral direction and 1 in the longitudinal direction.
心之天線線圈時， 、第2磁性體鐵心 2.使用具備第3磁性體鐵心（厚度為第1 23 200805794 厚度之1/4)之天線線圈時’ 3.使用具備第3磁性體鐵心（縱 方向長度為第1、帛2磁性體鐵心之縱方向長度之叫之 天線線圈時等3種類型中，將天線線圈與讀寫器間之距離 設定為100mm，測定能獲得何種程度之耦合係數，第η 圖係顯示各類型之實驗結果。 第2實驗中，係使用具有橫方向為45随、縱方向為 卯職之主面的電路基板、與橫方向為45mm、縱方向為 l〇mm、厚度冑lmm的天線線圈。除了長度尺寸以外天 線線圈之構成與第i實施形態相 “ …U 穴琛綠圈係以兩端各 露出磁性體鐵心之方式構成第i線圈部與第2線圈 部’各線圈部之線圈導體係分別以〇.22_間隔形成7圈。 ^磁性鐵心係使用與第i實驗相同的肥粒鐵。&，與第i 實驗相同，在3種類型中’將天線線圈與讀寫器間：距離 设定為iOOmm，測定能獲得何種程度之耦合係數。第Η 圖係顯示各類型之實驗結果。 由第11圖可知’藉由增長第1磁性體鐵心與第2磁性 =心之距離，在使用丨·不具備第3磁性體鐵心之天線線 圈日r麵合係數雖較其们個類型大幅降低，但即使是在 弟1磁性體鐵心與第2磁性體鐵心之距離為天線線圈長度 之60%時’亦能實現輕合係數〇 22%，獲得超過在第】磁 性體鐵心與第2磁性體鐵心間去< 鐵間未设置間隙時所獲得之耦合 8〇〇/。的耗合係數。因此可知，在第！磁性體鐵心與 弟2磁性體鐵心間之磁通進人部分即衫存在磁性體鐵 心’亦能捕捉來自讀寫器之磁通，而獲得可建立通訊之足 24 200805794 夠大的耦合係數。 由第12圖可知，第2實驗中’當第1磁性體鐵心與第 2磁性體鐵心之距離為天線線圈長度之6〇0/❹時，即使在使 用1 _不具備第3磁性體鐵心之天線線圈時亦能實現〇29〇/〇 的竊合係數’獲得超過在第1磁性體鐵心與第2磁性體鐵 心間未設置間隙時所獲得之耦合係數之8〇%的高耦合係 數。 _ 由以上之第1實驗與第2實驗之結果可知，設天線線 圈之線圈軸方向長度為A、第1磁性體鐵心與第2磁性體 鐵〜之距離為B時，若滿足〇 · 6 A g B，即能良好的與天線 線圈之線圈軸方向正交之磁通交鏈，實現較高的天線靈敏 度0 再者’若滿足B - 0.4A的話，即能大幅縮小天線線圈 之體積。 (第5實施形態） 參照弟13圖說明第5實施形態之天線線圈之構造。第 13圖係顯示形成5個連接導體77之天線線圈72之構成的 立體圖。第1線圈部72a與第2線圈部72b係利用形成於 軟性基板75之5個連接導體77a，77b，Wc，77d，77e來連 接，各連接導體係以等間隔形成。除了連接導體以外之天 線線圈之構造係依據第1實施形態構成。若藉由起槽機 (router)或雷射等切斷5個連接導體中之4個連接導體，則 來自第1線圈部或第2線圈部之電流路徑（pass)成為丨個。 依路徑使構成天線線圈之各線圈部之導體長度變更，切斷 25 200805794 連接導體771>，77(：，77(1，776使電流之路徑成為連接導體77& 時，該導體之長度變最短，相反地，切斷連接導體77a 77b 77c，77d使電流之路徑成為連接導體77e時，該導體之手 度變最長。 & (實驗例） 表1係顯示第5實施形態之天線線圈72中，將路徑與 電感值之關係、及以選擇連接導體77a作為路徑時之電感 值作為基準之各路徑之電感值之變化率的圖。由表1可头When the antenna coil of the heart is used, the second magnetic core 2 is used when the antenna coil having the third magnetic core (the thickness is 1/4 of the thickness of the first 23 200805794) is used. 3. The third magnetic core is used. In the three types, such as the antenna coil in which the length of the direction is the longitudinal length of the first and second magnetic cores, the distance between the antenna coil and the reader is set to 100 mm, and the degree of coupling coefficient can be determined. The nth graph shows the experimental results of each type. In the second experiment, a circuit board having a main surface of 45 in the lateral direction and a longitudinal direction is used, which is 45 mm in the lateral direction and l〇mm in the longitudinal direction. An antenna coil having a thickness of 胄1 mm. The configuration of the antenna coil in addition to the length dimension is the same as that of the i-th embodiment. The U-thickness and the green coil form the ith coil portion and the second coil portion so that the magnetic cores are exposed at both ends. 'The coil guide systems of the coil sections are respectively formed at intervals of 〇.22_. 7] The magnetic core uses the same ferrite iron as the i-th experiment. &, the same as the i-th experiment, in three types Between antenna coil and reader: distance setting For iOOmm, measure the degree of coupling coefficient that can be obtained. The figure shows the results of each type of experiment. It can be seen from Fig. 11 'by increasing the distance between the first magnetic core and the second magnetic=heart, using 丨The antenna r-coupling coefficient of the antenna coil that does not have the third magnetic core is greatly reduced compared to the type of the antenna, but even when the distance between the magnetic core of the first magnetic body and the second magnetic core is 60% of the length of the antenna coil 'The light-coincidence coefficient 〇22% can also be achieved, and the coupling coefficient of the coupling 8〇〇/ obtained when the gap between the magnetic core and the second magnetic core is not set between the iron core and the second magnetic core is obtained. Therefore, it can be seen that the magnetic flux between the magnetic core and the magnetic core of the second magnetic body is the magnetic core, and the magnetic flux from the reader can also be captured, and the communication can be established 24 200805794 Large coupling coefficient. As can be seen from Fig. 12, in the second experiment, when the distance between the first magnetic core and the second magnetic core is 6〇0/❹ of the length of the antenna coil, even if 1 _ is not used 3 magnetic core iron antenna coil can also be real The stealing coefficient of 〇29〇/〇 obtains a high coupling coefficient exceeding 8〇% of the coupling coefficient obtained when no gap is provided between the first magnetic core and the second magnetic core. _ From the first experiment above As a result of the second experiment, it is understood that when the length of the coil in the coil axis direction is A and the distance between the first magnetic core and the second magnetic iron is B, it is good if 〇·6 A g B is satisfied. The magnetic flux is orthogonal to the direction of the coil axis of the antenna coil, and the antenna sensitivity is high. 0 If the B - 0.4A is satisfied, the volume of the antenna coil can be greatly reduced. (Fifth Embodiment) Fig. 13 is a view showing the structure of the antenna coil of the fifth embodiment. Fig. 13 is a perspective view showing the configuration of the antenna coil 72 forming the five connection conductors 77. The first coil portion 72a and the second coil portion 72b are connected by five connection conductors 77a, 77b, Wc, 77d, 77e formed on the flexible substrate 75, and the respective connection guide systems are formed at equal intervals. The structure of the antenna coil other than the connection conductor is configured according to the first embodiment. When four of the five connection conductors are cut by a router or a laser, the current path from the first coil portion or the second coil portion is one. The length of the conductors of the coil portions constituting the antenna coil is changed according to the path, and the length of the conductor is shortened when the connection conductor 771 >, 77 (:, 77 (1,776) makes the current path become the connection conductor 77 & On the other hand, when the connection conductors 77a to 77b 77c and 77d are cut so that the current path becomes the connection conductor 77e, the hand of the conductor becomes the longest. [Experimental Example] Table 1 shows the antenna coil 72 of the fifth embodiment. A graph showing the relationship between the path and the inductance value and the rate of change of the inductance value of each path using the inductance value when the connection conductor 77a is used as a reference.
使路徑從連接導體77a變化至77e，隨著構成各線圈部之 導體長度變長，電感值亦變大，與選擇路徑77a時相轸 選擇路徑77e時能獲得i [41%之電感值。亦即，在5個驾 接導體77a，77b，77c，77d，77e中，依據所選擇之作為路卷 之連接導體，能在11 %左右之範圍内變更電感值。 (表1) 路徑 電感值 變化率（％、 77a 1.1721 0.00 ^ 77b 1.2077 3.03 ^〜 77c 1.2331 5.20 77d 1.2736 8.66 77e 1.3059 ,, --—-J 當變更天線線圈之電感值時，能調替 田天線線圈盘雷 谷構成之諧振電路之諧振頻率。一般而t 、 口，天線線圈中， 雖與諧振頻率無關而會因通過線圈部之、 力，但在賴頻率與進人之料頻率—、變化感應電 大的電m，將諧振電路之諧振感應特別 个碉整為所欲之值 26 200805794 所產生之電壓變大，能提高天線之通訊靈敏度。如第j 3 圖所示，若形成天線線圈72，則在製作天線線圈後，由於 能選擇電感’因此能非常容易地使天線之通訊靈敏度提 高。 此外’弟13圖所記載之天線線圈7 2中，來自讀寫器 之磁通進入之非捲繞部形成連接導體77a，77b，77e，77d， 77e。該等連接導體雖會妨礙磁通進入，但由於形成連接導 體部分相對於非捲繞部面積之比例非常小，因此磁通會順 利進入。 (第6實施形態） 第6實施形態之天線裝置係藉由將基板構裝用天線線 圈以具有間隙之方式構裝於電路基板來構成。又，在與基 板構裝用天線線圈之電路基板相對向的面形成電極，此亦 為本實施形態特有之特徵。其他之構成，亦即以下實施例The path is changed from the connecting conductor 77a to 77e, and as the length of the conductor constituting each coil portion becomes longer, the inductance value also becomes larger, and when the path 77a is selected, the inductance value of i [41% can be obtained. That is, in the five driving conductors 77a, 77b, 77c, 77d, and 77e, the inductance value can be changed within a range of about 11% depending on the selected connecting conductor as the winding. (Table 1) Path inductance value change rate (%, 77a 1.1721 0.00 ^ 77b 1.2077 3.03 ^~ 77c 1.2331 5.20 77d 1.2736 8.66 77e 1.3059 ,, ----J When changing the inductance value of the antenna coil, the field antenna can be replaced The resonant frequency of the resonant circuit formed by the coil disk Thunder Valley. Generally, in the antenna coil, although it is independent of the resonant frequency, it will pass the force of the coil, but the frequency and the frequency of the incoming material will change. Inductively large electric m, the resonance inductance of the resonant circuit is specially adjusted to the desired value. 26 The voltage generated by 200805794 becomes larger, which can improve the communication sensitivity of the antenna. As shown in the figure j3, if the antenna coil is formed 72, after the antenna coil is fabricated, since the inductance can be selected, the communication sensitivity of the antenna can be easily improved. In addition, in the antenna coil 72 described in the '13 diagram, the magnetic flux from the reader/writer enters. The winding portion forms connection conductors 77a, 77b, 77e, 77d, 77e. Although the connection conductors hinder the entry of the magnetic flux, the ratio of the portion of the connection conductor formed to the area of the non-winding portion is very large. (Eighth Embodiment) The antenna device of the sixth embodiment is configured by arranging the antenna coil for the substrate assembly on the circuit board with a gap therebetween. The electrode is formed on the surface of the circuit board on which the antenna coil is mounted, which is also a feature specific to the embodiment. The other configuration is the following embodiment.
所未記載之構成係依據第丨實施形態。然而，未形成用以 連接於輸出入端子之突出部。 (實施例1) 參照第14圖說明實施例i之天線裝置之構造。第μ 圖係顯示實施例i之天線裝置之構造圖。⑷係俯視圖。⑻ 係（A)之A —A部分之截面圖。 如第14圖所示，天線線圈1 〇2係以a女„秘 z保以具有間隙之方式構 裝於電路基板101。天線線圈102中 甲，在與弟1磁性體鐵 心104a與第2磁性體鐵心l〇4b之雷敗豈& 1Λ1 路基板101相對向的 面形成電極109。電極109之主面啟镇】锫。 -、第1、弟2磁性體鐵 27 200805794 心104a，104b之主面倍以□ ^ u 你U冋一形狀、同一尺寸形成，電極 109之主面與第1、第2磁性驴 砸注體鐵心104a，104b之主面完 全重疊。 電路基板1〇1，例如，具有長邊方向長度為9〇麵、短 邊方向長度為50mm之拓带士 ;^ 矩心主面。以天線線圈102之橫方 向與電路基板1〇1之長邊方向平行之方式配置天線線圈 102又’电路基板101與天線線圈間之間隙為―❿。The configuration that is not described is based on the third embodiment. However, the projection for connecting to the input/output terminal is not formed. (Embodiment 1) A configuration of an antenna apparatus of Embodiment i will be described with reference to Fig. 14. The μth diagram shows the configuration of the antenna device of the embodiment i. (4) Top view. (8) A cross-sectional view of the A-A portion of the system (A). As shown in Fig. 14, the antenna coil 1 〇 2 is mounted on the circuit board 101 so as to have a gap therebetween. The antenna coil 102 is in the A, the magnetic core 104a and the second magnetic body in the mate 1 The core of the body core l〇4b is defeated and the electrode 109 is formed on the opposite surface of the substrate 101. The main surface of the electrode 109 is activated. -, the first, the second, the magnetic iron 27 200805794, the heart 104a, 104b The main surface is formed by the same size and the same size, and the main surface of the electrode 109 completely overlaps with the main surfaces of the first and second magnetic cores 104a and 104b. The circuit board 1〇1, for example , having a length of 9 长 in the longitudinal direction and a length of 50 mm in the short side; ^ a main surface of the centroid; the antenna is arranged such that the lateral direction of the antenna coil 102 is parallel to the longitudinal direction of the circuit board 1 〇 1 The gap between the coil 102 and the circuit board 101 and the antenna coil is "❿".
以下說明如此構成所獲得之效果。如第2實施形態所 說明，進入設於天線線圈1〇2之第i磁性體鐵心1〇牝與第 2磁性體鐵心104b間之線圈導體之非捲繞部之磁通，係存 在於天線線圈102之背後，由具有導電性之電路基板101 遮蔽進路而改變行進方向，接著進人帛i磁性體鐵心104a 與第2磁性體鐵心104b。在電路基才反1〇1與天線線圈1〇2 之間設有間隙時，進入第i磁性體鐵心1〇4a與第2磁性體 鐵U 1 04b之磁通’可旎從與第〗、第2磁性體鐵心⑺4a，1 〇4b 之電路基板1 〇 1相對向的面射出。若以此方式從與電路基 板ιοί相對向的面射出，則無法通過第i線圈部i〇2a與第 2線圈部102b，目此會有無法引起電磁感應、，或所感應之 電壓非#小之問題。然而，由於本實施形態在與第1磁性 體鐵心104a與第2磁性體鐵心10仆之電路基板101相對 向的面形成電極109，因此能防止磁通之射出。因此，和 來自與天線線圈102之主面垂直方向之磁通交鏈，能使由 第1線圈部102a與第2線圈部102b構成之線圈產生電壓。 (實施例2) 28 200805794 參照第15圖說明實施例2之天線裝置之構造。第i5 圖係顯示實施例2之天線裝置之構造的圖β(Α)係俯視圖。 (Β)係（Α)之Β~ Β部分之截面圖。The effect obtained by such a configuration will be described below. As described in the second embodiment, the magnetic flux entering the non-winding portion of the coil conductor provided between the i-th magnetic core 1〇牝 and the second magnetic core 104b of the antenna coil 1〇2 is present in the antenna coil. Behind the 102, the conductive circuit board 101 shields the approach and changes the traveling direction, and then enters the magnetic core 104a and the second magnetic core 104b. When a gap is provided between the circuit base and the antenna coil 1〇2, the magnetic flux entering the ith magnetic core 1〇4a and the second magnetic iron U1 04b can be 与, The second magnetic core (7) 4a, 1 〇 4b is printed on the surface on which the circuit board 1 相对 1 faces. If it is emitted from the surface facing the circuit board ιοί in this manner, the i-th coil portion i〇2a and the second coil portion 102b cannot be passed, and thus the electromagnetic induction cannot be caused, or the induced voltage is not small. The problem. However, in the present embodiment, the electrode 109 is formed on the surface facing the circuit board 101 of the first magnetic core 104a and the second magnetic core 10, so that the magnetic flux can be prevented from being emitted. Therefore, the magnetic flux is orthogonal to the main surface of the antenna coil 102, and a voltage is generated by the coil formed by the first coil portion 102a and the second coil portion 102b. (Embodiment 2) 28 200805794 The configuration of the antenna apparatus of Embodiment 2 will be described with reference to Fig. 15. Fig. i5 is a plan view showing the structure of the antenna device of the second embodiment. (Β) A cross-sectional view of the Β~ Β part of the system.
如弟15圖所示’天線線圈"2係以具有間隙之方式構 裝於電路基板⑴。天I㈣112之構造，係在位於線圈 轴方向兩外侧之第i磁性體鐵心"乜與第2磁性體鐵心 114b之兩端面連接有在與線圈轴方向正交之方向延伸之磁 性體鐵心U8a，118卜第i、第2磁性體鐵心及軟性基板 之形成方法係依據第i實施形態，第1磁性體鐵心之外侧 端部與第2磁性體鐵心之外侧端部間之距離為45腿。然 而’未形成用以連接於輸出入端子之突出冑。磁性體鐵心 ma，mb之縱方向長度冑10mm、橫方向長度為imm、 厚度方向長度為3.5mm。磁性體鐵心U8a係黏著於第 性體鐵心114a之線圈軸方向的端面。又，磁性體鐵心u8a 之縱方向的邊與第i磁性體鐵心U4a之縱方向的邊重疊， 磁性體鐵心118b之橫方向的邊與第！磁性體鐵心U4a之 橫方向的邊並排配置於同一直線上。同樣地，在第2磁性 體鐵心114b之端面亦黏著磁性體鐵心丨丨⑽。電極i丨9係 形成於與第l磁性體鐵心U4a、第2磁性體鐵心114b之 電路基板m相對向的面，且覆蓋各磁性體鐵心114a，U4b 之整面。 電路基板111係銅製，其長邊方向為9〇πιπ1、短邊方 向為45mm、厚度為lmm。將天線線圈112配置成天線線 圈112之橫方向與電路基板lu之長邊方向平行。又，電 29 200805794 路基板111與天線線圈112間之間隙為1 mm。若以此方式 將天線線圈112構裝於電路基板111，則連接於天線線圈 112端部之磁性體鐵心11 ga，11⑼會成為順著電路基板111 侧面之形狀。 藉由如此構成，進入天線線圈112之非捲繞部之磁通 會通過第1線圈部112a與第2線圈部112b。由於在第1 磁性體鐵心114a與第2磁性體鐵心114b形成有電極，因 _ 此即使在天線線圈112與電路基板111之間設有間隙，亦 不通過第1線圈部112a與第2線圈部112b且不會射出。 通過第1、第2線圈部U2a，112b之磁通係進入連接之磁 性體鐵心118a，118b，而從磁性體鐵心i18a, n8b之側面 射出。 本實施例中，由於在天線線圈112之端部形成有磁性 體鐵心，因此端部之磁阻降低。因此，通過第j線圈部丨12a 與第2線圈部112b之磁通增加，藉此所感應之電壓增加。 馨 因此，能進一步進行高靈敏度的通訊。 本κ %形悲中’如上所述，在與天線線圈之電路基板 相對向的面形成有電極，藉此即使在天線線圈與電路基板 間設有間隙亦能實現與讀寫器之高靈敏度的通訊。因此， 當將由天線線圈與電路基板構成之天線裝置裝載於行動終 端時’使天線線黏著於行動終端之框體，在與電路基板之 間亦能設置間隙。此外，在具備主框體與副框體之雙折疊 之打動終端裝載上述天線裝置時，在主框體設置電路基 板’在副框體設置天線線圈，在折疊行動終端之狀態下， 30 200805794 亦能形成為從讀寫器側觀察，在天線線圈背後具有電路基 板。以此方式將形成電極之天線線圈以具有間隙之方式構 裝於電路基板，藉此天線裝置設置於行動終端之部位在設 計上之自由度會增加。 【圖式簡單說明】 第1圖係顯示第1實施形態之基板構裝用天線線圈之 構造的圖。（A)係立體圖、（B)係俯視圖。 第2圖係顯示捲繞於磁性體鐵心前之軟性基板構造之 Φ 俯視圖。 第3圖係顯示構裝第2實施形態之基板構裝用天線線 圈之天線裝置之構造圖。（A)係立體圖、（B)係俯視圖。其 係顯示將第1圖所示之天線裝置遮住RFID系統用讀寫器 狀態之磁通路徑之示意圖。 第4圖係顯示將第3圖所示之天線裝置遮住rfid系 統用項寫器狀態之磁通路徑之示意圖。 第5圖係顯示第3實施形態之天線線圈構造之立體圖。 _ 第6圖係顯示第3實施形態之天線線圈構造之立體圖。 第7圖係顯示第4實施形態之天線裝置構造之立體圖。 第8圖係顯示第4實施形態之天線裝置構造之立體圖。 第9圖係顯示第4實施形態之天線裝置構造之立體圖。 第10圖係顯示第4實施形態之天線裝置構造之立體 圖。 第11圖係顯示第1實驗之第1磁性體鐵心與第2磁性 體鐵心之距離與磁通之粞合係數關係的圖。 31 200805794 第12圖係顯示第1實驗之第1磁性體鐵心與第2磁性 體鐵心之距離與磁通之搞合係數關係的圖。 第13圖係顯示第5實施形態之基板構裝用天線線圈構 造之立體圖。 第14圖係顯示第6實施形態之天線裝置構造之圖。（A) 係俯視圖、（B)係（A)之A—A部分截面圖。 接之圖。（A; 第1 5圖係顯示第6實施形態之天線裝置構μ 係俯視圖、（Β)係（Α)之Β - Β部分截面圖。 ^。 第16圖係顯示習知例之天線裝置構造& > 【主要元件符號說明】 φ 磁通 第1 第2 第1 第 線_ 線_ # 嫁_部 一性雜鐵心 鐵心 1，21，31，41，51，61，101，111 電路基板 2,22,3 2,42,52,62,72,82,92，102，112 2a，22a，3 2a，72a，82a，92a，102a，l 12a 2b，22b，3 2b，72b582b，92b，102b，112b 4a，24a，34a，44a，54a，64a，84a，94a，104a，l 14a 4b，24b，34b，44b，54b，64b，84b，94b，104b，114b 5,25,75，105，115 軟性基板 6,7,27,77a，77b，77c，77d，77e 連接導體 8 開口部 9 突出部 11 點 20 讀寫器 23,33,43,53,63 天線裝置 32 200805794 34c，44c，54c，64c 第3磁性體鐵心 88a，88b，98a，98b，l 18a，l 18b 磁性體鐵心 109,119 電極The "antenna coil" 2 shown in Fig. 15 is structured to have a gap on the circuit board (1). The structure of the day I (four) 112 is such that a magnetic core U8a extending in a direction orthogonal to the coil axis direction is connected to both end faces of the i-th magnetic core "乜 and the second magnetic core 114b on both outer sides in the coil axis direction, According to the i-th embodiment, the distance between the outer end portion of the first magnetic core and the outer end portion of the second magnetic core is 45 legs. However, the protruding pupils for connecting to the input and output terminals are not formed. The length of the magnetic core ma, mb is 胄10 mm in the longitudinal direction, imm in the lateral direction, and 3.5 mm in the thickness direction. The magnetic core U8a is adhered to the end surface of the first embodiment iron core 114a in the coil axis direction. Further, the side in the longitudinal direction of the magnetic core u8a overlaps with the side in the longitudinal direction of the i-th magnetic core U4a, and the side in the lateral direction of the magnetic core 118b and the first! The sides of the magnetic core U4a in the lateral direction are arranged side by side on the same straight line. Similarly, the magnetic core 丨丨 (10) is adhered to the end surface of the second magnetic core 114b. The electrode i丨9 is formed on a surface facing the circuit board m of the first magnetic core U4a and the second magnetic core 114b, and covers the entire surface of each of the magnetic cores 114a and U4b. The circuit board 111 is made of copper and has a longitudinal direction of 9 〇πιπ1, a short side direction of 45 mm, and a thickness of 1 mm. The antenna coil 112 is disposed such that the lateral direction of the antenna coil 112 is parallel to the longitudinal direction of the circuit board lu. Further, the gap between the circuit board 111 and the antenna coil 112 is 1 mm. When the antenna coil 112 is mounted on the circuit board 111 in this manner, the magnetic cores 11 ga, 11 (9) connected to the end portions of the antenna coil 112 have a shape along the side surface of the circuit board 111. With this configuration, the magnetic flux that has entered the non-winding portion of the antenna coil 112 passes through the first coil portion 112a and the second coil portion 112b. Since the electrodes are formed in the first magnetic core 114a and the second magnetic core 114b, even if a gap is provided between the antenna coil 112 and the circuit board 111, the first coil portion 112a and the second coil portion are not passed. 112b will not be shot. The magnetic flux passing through the first and second coil portions U2a, 112b enters the connected magnetic cores 118a, 118b, and is emitted from the side faces of the magnetic cores i18a, n8b. In the present embodiment, since the magnetic core is formed at the end portion of the antenna coil 112, the magnetic resistance of the end portion is lowered. Therefore, the magnetic flux passing through the j-th coil portion a12a and the second coil portion 112b is increased, whereby the induced voltage is increased. Xin, therefore, can further carry out high-sensitivity communication. As described above, an electrode is formed on a surface facing the circuit board of the antenna coil, whereby high sensitivity with the reader can be realized even if a gap is provided between the antenna coil and the circuit board. communication. Therefore, when the antenna device including the antenna coil and the circuit board is mounted on the mobile terminal, the antenna wire is adhered to the casing of the mobile terminal, and a gap can be provided between the circuit board and the circuit board. Further, when the antenna device is mounted on the double-folded actuation terminal of the main housing and the sub-frame, the circuit board is provided in the main housing, and the antenna coil is provided in the sub-frame, and in the state of folding the mobile terminal, 30 200805794 It can be formed to have a circuit board on the back of the antenna coil as viewed from the reader/writer side. In this way, the antenna coil forming the electrode is mounted on the circuit board with a gap, whereby the degree of freedom in designing the portion of the antenna device provided at the mobile terminal increases. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the structure of an antenna coil for a substrate assembly according to a first embodiment. (A) is a perspective view, and (B) is a top view. Fig. 2 is a plan view showing the structure of a flexible substrate wound around a magnetic core. Fig. 3 is a structural view showing an antenna device for arranging an antenna coil for a substrate assembly according to a second embodiment. (A) is a perspective view, and (B) is a top view. It is a schematic diagram showing a magnetic flux path in which the antenna device shown in Fig. 1 is shielded from the reader/writer state of the RFID system. Fig. 4 is a view showing a magnetic flux path in which the antenna device shown in Fig. 3 is shielded from the item writing state of the rfid system. Fig. 5 is a perspective view showing the structure of the antenna coil of the third embodiment. Fig. 6 is a perspective view showing the structure of the antenna coil of the third embodiment. Fig. 7 is a perspective view showing the structure of an antenna apparatus according to a fourth embodiment. Fig. 8 is a perspective view showing the structure of an antenna apparatus according to a fourth embodiment. Fig. 9 is a perspective view showing the structure of an antenna apparatus according to a fourth embodiment. Fig. 10 is a perspective view showing the structure of an antenna apparatus according to a fourth embodiment. Fig. 11 is a view showing the relationship between the distance between the first magnetic core and the second magnetic core in the first experiment and the coupling coefficient of the magnetic flux. 31 200805794 Fig. 12 is a view showing the relationship between the distance between the first magnetic core and the second magnetic core in the first experiment and the engagement coefficient of the magnetic flux. Fig. 13 is a perspective view showing the structure of the antenna coil for substrate assembly of the fifth embodiment. Fig. 14 is a view showing the structure of an antenna apparatus according to a sixth embodiment. (A) is a plan view, and (B) is a cross-sectional view of the A-A portion of the system (A). Connected to the map. (A; Fig. 15 is a plan view showing a configuration of an antenna device according to a sixth embodiment, and a partial cross-sectional view of the Β-Β of the antenna system. Fig. 16 is a view showing the structure of an antenna device of a conventional example. &> [Description of main component symbols] φ Magnetic flux 1st 2nd 1st 1st line _ line_# Marriage_partial monolithic iron core 1,21,31,41,51,61,101,111 circuit board 2,22,3 2,42,52,62,72,82,92,102,112 2a,22a,3 2a,72a,82a,92a,102a,l 12a 2b,22b,3 2b,72b582b,92b, 102b, 112b 4a, 24a, 34a, 44a, 54a, 64a, 84a, 94a, 104a, 14a 4b, 24b, 34b, 44b, 54b, 64b, 84b, 94b, 104b, 114b 5, 25, 75, 105, 115 flexible substrate 6,7,27,77a,77b,77c,77d,77e connecting conductor 8 opening portion 9 protruding portion 11 point 20 reader/writer 23, 33, 43, 53, 63 antenna device 32 200805794 34c, 44c, 54c , 64c third magnetic core 88a, 88b, 98a, 98b, l 18a, l 18b magnetic core 109, 119 electrode
3333
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006187484 | 2006-07-07 | ||
| JP2006198253 | 2006-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200805794A true TW200805794A (en) | 2008-01-16 |
| TWI347035B TWI347035B (en) | 2011-08-11 |
Family
ID=38894301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW95146216A TW200805794A (en) | 2006-07-07 | 2006-12-11 | Antenna coil for mounting on substrate and antenna device with such antenna coil |
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|---|---|
| TW (1) | TW200805794A (en) |
| WO (1) | WO2008004326A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008111330A1 (en) * | 2007-03-09 | 2008-09-18 | Murata Manufacturing Co., Ltd. | Antenna coil for mounting on circuit board |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08204432A (en) * | 1995-01-27 | 1996-08-09 | Citizen Watch Co Ltd | Antenna structure for portable electronic equipment |
| JP4280313B2 (en) * | 1997-10-16 | 2009-06-17 | 株式会社日立国際電気 | IC card system |
| JP3669217B2 (en) * | 1999-07-22 | 2005-07-06 | 株式会社デンソー | ID tag |
| JP3649128B2 (en) * | 2001-01-09 | 2005-05-18 | 株式会社デンソー | ID tag |
| JP2003318634A (en) * | 2002-04-24 | 2003-11-07 | Smart Card:Kk | Noncontact sensor coil |
| JP4304672B2 (en) * | 2003-11-27 | 2009-07-29 | 日立金属株式会社 | Radio clock antenna and radio clock using the same |
| JP4206946B2 (en) * | 2004-03-23 | 2009-01-14 | パナソニック株式会社 | Magnetic antenna |
| JP3121577U (en) * | 2006-03-02 | 2006-05-18 | 株式会社スマート | Eccentric magnetic coil system |
-
2006
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| WO2008004326A1 (en) | 2008-01-10 |
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