1354936 九、發明說明： 【發明所屬之技術領域】 本發明有關非接觸式積體電路(Integrated Circuit，1C) 卡系統’尤指一種用於射頻識別（Radio Frequency Identification，RFID)的非接觸式1C卡系統。 【先前技術】1354936 IX. Description of the Invention: [Technical Field] The present invention relates to a non-contact integrated circuit (1C) card system, especially a non-contact type 1C for radio frequency identification (RFID). Card system. [Prior Art]
近幾年來，RFID系統已廣泛應用於大眾運輸系統的 自動驗票、門禁系統的人員出入控管、以及電子錢系統 等。RFID系統通常包含非接觸式〗匸卡以及讀寫裝置來讀 取與寫入1C卡内的資料。RFID系統利用電磁感應的原 =，自讀寫裝置内的環形天線輻射出的電磁場伴隨著1〇卡 缞形天線的電磁感應，以提供1(：卡與讀寫裝置間的通訊。 爲丁確保IC卡與讀寫裝置間有良好的通訊範圍，讀寫 ^置内的環形天線應能輻射出相當程度的電磁場強度。讀 ^裝置的環形天線包含由導體平面繞組形成的環形線 复其中，環形線圈形成有以其中心彼此相對的繞組區， 隔與寬度相同且相對稱。此外，由於渦電流會導致讀 置的鄉天線征常運作，故*應裝設於金屬殼體。 =線圈„金屬殼體m置的環形天線無法有 小。電，場輻射至1c卡，使得IC卡與讀寫裝置通訊範圍 於产倘若以樹脂材質的殼體來覆蓋環形線圈，墊片應設置 ^形天線與樹脂材質殼體内的電路板間，以避免電磁輻 子弓丨起的噪音，如此會増加殼體的厚度。小型可攜式電 、置爲了便於攜帶，有其尺寸限制。因此，任何環形線 5 1354936 - 圈配置均不能保證殼體内環形線圈的空間能足以抑制輻 . 射自環形天線的電磁場對鄰近殼體内壁的電路板等裝置 造成不良影響，亦無法防止金屬殼體影響環形天線。因 此’金屬容器與RFID系統相容度差。為改善前述缺點， 遂有一些RFID天線之增益改良為人所揭示。 揭示於美國第7,161,542號專利的RFID天線電性連接 至1C晶片或電容器’並固定於物體。該天線包含其第一侧 安装於物體上的平面導電構件，以及安裝在導電構件第二 • 側(相對於第一側）的線圈主體，由線圈匝數組成的，其中 導電構件隔離線圈主體與物體。圖1與圖2繪示揭露於美國 第7，161，542號專利的RFID天線。導電構件14a使用導電材 質的薄片、薄板、或薄膜。只要導電構件14a具有導電性 質，即可藉由將導電油墨塗佈於非導電薄片、薄板、或薄 膜16背面，並將其乾燥，來取得作為導電塗膜的構件丨斗牡， 如圖2的放大圖所示。螺旋線圈主體14b使用傳統線圈主 體。線圈主體14b由調整線圈主體14b的螺旋直徑或匝數所 形成。當線圈主體14b捲繞於導電構件14a的前端時，則取 得預設特徵值。當1C晶片13連接至線圈主體14b的兩端 時’則1C晶片13直接黏附於導電構件丨4a。將線圈主體14b 固定於導電構件14a ’則美國第7，161，542號專利的天線14 特徵值普遍會改變。當線圈主體14b捲繞於導電構件14& =前端時，則可能以預設頻率傳送電波至天線14來啟動標 籤12。然而，就天線14而言，以預設頻率接收電波的線圈 主體14b應捲繞於導電構件14a的前端。爲了預設頻率而調 6 整線圈主體14b並不容层。im 構件Ma後，其特徵值無法調整。線圈主體⑽固定於導電 用於亦揭露於美國第7，183,987號專利。提供 icZ ft ^ €形缞_，，天料置3G包含輻射電磁場的 ϋ線圈31射C卡的環形線圈磁性 ic卡的#料。天線裝置3G亦包含 2 與接收 ic卡的主側相對立的磁性薄片32。同：二二^側並與 以其中心彼此相對的不對稱繞組區，其某:二的 如圖3箭號撕示的垂直方向，'環形線 宽=rrt隔與寬度較大，下部繞組區3_間隔與 ίί二:Γ 磁性薄片32形成較環形線圈31大的 矩形其主侧得以完全覆蓋後者。本天線裝置30 依附於環形_31主側的磁性薄片32，與㈣忙卡的主 相對立。由於環形線圈31不對稱’且自環形線圈31轄射之 ^場^布被㈣，故可提供IC卡與卿間較廣泛的通訊範 圍，亦可在某-方向上改變通訊位置。再者，天線裝置卯 具有面對環料圈31主侧的磁性薄片32，與面對1(：卡的主 巧才目對立，因此可僅提升面對IC卡的環形線圈31主侧的磁 %分布。環形線圈31應以特殊形式製成，使其在安裝 法調整’以解決上述問題。 … 在金屬環境下運作的RFID系統天線裝置在技術上是 可行的，然在實際實施卻有其難處。解決的方式多半是利 用吸波材進行部份阻隔後，然後採用立體式線圈設計的天 線’ 1C卡與讀寫裝置間的通訊範圍因此大為增加。上述 的設计較雜f彳 容。另外也可_心增加許多不確㈣雜散電 布的傳送由垂直;場分布，其中磁場分 面，大為減少金屬所金屬表面改成平行於金屬表 度過大，為達到屬烕影響'然其前述所需的天線厚 天線無法適用於當前度的訴求’傳統厚度的RFID 提出-種可在金屬产化的時代。因此’本發明遂 來解決當下習知技非接觸式1c卡系統 【發明内容】 段落本案的某些特徵，其他特徵將敍述於後續的 落作為參ΐ附加㈣請專利範圍定義，其合併於此段 1C =之ΐ要目的為提供一種用於讀卡機的非接觸式 曰Μ沾 I括執行非接觸式識別的1C晶片、連接至IC 主天線，以將信號送入與送出讀卡機、以及至少一 於主天線上的開路天線，用來增加主天線的增益， 增強主天線的電磁感應。 根據本案構想，其中信號為射頻信號。 根據本案構想，其中主天線與開路天線為平面天線。 組線=本轉想，其中主天線與開路天㈣包括一對繞 的繞應其中開路天線的繞組線圈端與⑽ 1354936 根據本案構想’其中非接觸式1C卡系統進一歩包括 用來降低金屬物體置於金屬環境中造成的干擾的屏蔽構 件。 根據本案構想，其中屏蔽構件設置於金屬物體與主天 線之間。 Μ 根據本案構想，其中開路天線設置於主天線與屏蔽構 件之間。 根據本案構想，其中開路天線设置主天線與屏蔽構件 上。 本案之主要另一目的為提供一種在金屬環境下與讀 卡機通訊的非接觸式1C卡系統，包括執行非接觸式識別 的1C晶片、連接至IC晶片的主天線，以將信號送入與送 出讀卡機、設置於金屬環境與主天線間的屏蔽構件，^降 低金屬環境所造成的干擾、設置於主天線與屏蔽構件之間 的第一開路天線、以及設置於主天線與屏蔽構件上的第二 開路天線。其中，第一開路天線與第二開路天線增加主天 線的增益，以増強主天線的電磁感應。 根據本案構想，其中信號為射頻信號。 根據本案構想，其中主天線和開路天線為平面天線。 根據本案構想，其中主天線、第一開路天線、以及第 二開路天線均包括一對繞組線圈端。 根據本案構想’其中第_與第二開路天線的繞組線圈 端與主天線繞組線圈端相對應。 9 1354936 - 【實施方式】 圖4繪示本發明用於金屬環境下之非接觸式積體電路 (Integrated Circuit, 1C)卡系統的天線裝置的第一實施例。 如圖4所示，與讀卡機（未圖示)通訊的非接觸式1C卡系統 包含1C晶片44、主天線42、屏蔽構件41、以及開路天線 43。 ’ 主天線42藉由一對繞組線圈端421連接至ic晶片44， 以及將射頻信號送入和送出讀卡機，使得IC晶片44可與讀 鲁卡機執行非接觸式識別。屏蔽構件41設置於金屬環境和 主天線42之間，來降低肇因於金屬環境的干擾。開路天 線43可設置於主天線42和屏蔽構件41之間或其上，以增加 主天線的增益，以強化主天線的電磁感應。在本實施例 中’開路天線43設置於主天線42與屏蔽構件41之上。 在本實施例中’非接觸式ic卡系統為射頻識別(RFID) 系統。非接觸式IC卡系統可使用於大眾運輸系統的付 款、信用卡交易、門禁系統資料的存取等。開路天線43 與主天線42不同的地方在於後者導性連接至IC晶片44。以 鲁 本發明來說，屏蔽構件41可為薄片、薄板、或薄膜形式的 導體。屏蔽構件41亦可為軟磁性構件，此外，磁性構件可 由快速固化材質、鎊造材質、軋延材質、锻造材質、以及 燒結材質其中至少一種所形成，上述每一種材質包含至少 一#晶合金、磁性鋼、矽鋼、鐵鋁合金、以及軟磁性鐵氧 體。同時，磁性構件含有（1)鐵氧體或金屬的薄片或微 粒、以及(2)塑膠或橡膠的複合材質，或者是包括内含鐵 氧體或金屬的薄片或微粒的塗膜。此外，磁性構件可為金 10 1354936 . 屬或軟磁性鐵氧體所組成的黏著薄片，藉由將複數個薄片 黏附至塑膠組成的底層材質薄片的表面 ，使得薄片彼此緊 . 密接觸。 如圖4所示的第一實施例中，開路天線43設置於主天 線42上方。在實際應用上，開路天線幻可設置於主天線42 和屏蔽構件41間。主天線42和開路天線43被絕緣，可進〆 步以塑膠組成的包覆薄片來包覆捲繞線圈並將捲繞線圈 與包覆薄片黏附在一起來取得開路天線43。 • 本發明可包含至少一開路天線。請參照圖5繪示用於 金屬環境下的非接觸式1C卡系統之第二實施例。在本實施 例中，非接觸式1C卡系統包含IC晶片54、主天線52、屏蔽 構件51、以及設置於主天線52上的兩個開路天線53a與 53b。同時，主天線52與開路天線53&和531)為屏蔽構件51 所屏蔽，肇因於金屬環境的干擾也因此降低。開路天線 與53b和主天線52不同的地方在於主天線52導性連接至Ic 晶片54。 本發明可用於如手機等可攜式通訊裝置，因此上述的 金屬環境可由設置於屏蔽構件51與主要晶片54間的手機 電池所造成。. 圖6繪示使用於金屬環境下的非接觸式IC卡系統之第 三實施例。在本實施例中，非接觸式ic卡系統包含Ic晶片 64、主天線62、屏蔽構件61、以及兩個開路天線6知和 63b。開路天線63a設置於主天線62與屏蔽構件61間， 天線63b則設置於主天線62與屏蔽構件61之上。 汗 11 1354936 主天線62以及開路天線63a與63b為屏蔽構件61所屏 蔽’可降低金屬環境所造成的干擾。開路天線63a盘63b 與主天線62* _地方在於後者導性連接至IC晶片64。 同樣地，非接觸式1C卡系統為咖〇系統。在本實施 例中，非接觸式1C卡系統可應用於大眾運輸系統、門禁 系統、信用卡交易等。此外’主天線62以及開路天線仏 與63b彼此絕緣。因此’天線的整體結構可藉由屏蔽構件 來避免金屬物體的影響’並藉由額外的開路天線來擴大通 訊感應作用範圍。 非接觸式1C卡系統通常不包含屏蔽構件，而非接觸式 1C卡系統不一定長期處在鄰近如手機電池等金屬物體的 環境下。 本發明的主天線與開路天線為平面天線，均具有一對 繞組線圈端。再者，開路天線的繞組線圈端的位置與主天 線的繞組線圈端相對應。 綜上所述’本發明揭露—種非接觸式〗c卡系統的開路 天線，以增加主天線的增益，以強化主天線的電磁感應。 當非接觸式1C卡系統置於如手機等金屬環境下時，可減少 金屬物體所引起的干擾效應。當非接觸式IC卡系統未置於 金屬環境時，則增大與讀卡機的通訊作用範圍。同時， 開路天線可依據照不同需求來調整主天線的頻率。 縱使本發明已由上述之實施例詳細敘述而可由熟悉 本技藝之人士任施匠思而為諸般修飾，然皆不脫如附申請 專利範圍所欲保護者。 12 1354936 【圖式簡單說明】 圖1為習知用於RFID具有天線的標籤的俯視圖； 圖2繪示圖一沿著線A_A所擷取的剖面圖； 圖3繪示習知用於非接觸式1C卡之記錄器或播放器的天線 裝置； 圖4繪示本發明用於金屬環境下之非接觸式1C卡系統的天 線裝置的第一實施例； 圖5繪示本發明非接觸式1C卡系統的第二實施例；以及 圖6繪示本發明非接觸式1C卡系統的第三實施例。 【主要元件符號說明】 12 標籤 13 IC晶片 14 天線 14a 導電構件 14b 線圈主體 16 薄膜 30 天線裝置 31 環形線圈 31a 上部繞組區 31b 下部繞組區 32 磁性薄片 41 屏蔽構件 42 主天線 421 繞組線圈端 43 開路天線 44 1C晶片 51 屏蔽構件 52 主天線 53a 開路天線 53b 開路天線 54 1C晶片 61 屏蔽構件 62 主天線 63a 開路天線 63b 開路天線 64 1C晶片 13In recent years, RFID systems have been widely used in automatic ticket inspection of mass transit systems, personnel access control in access control systems, and electronic money systems. RFID systems typically include a contactless Leica and read/write device to read and write data from the 1C card. The RFID system uses the original induction of electromagnetic induction, and the electromagnetic field radiated from the loop antenna in the read/write device is accompanied by the electromagnetic induction of the 1〇 card-shaped antenna to provide 1 (: communication between the card and the read/write device. There is a good communication range between the IC card and the read/write device, and the loop antenna in the read/write device should be able to radiate a considerable degree of electromagnetic field strength. The loop antenna of the read device includes a loop line formed by the planar winding of the conductor, and the ring shape The coil is formed with winding regions whose centers are opposite to each other with the same width and symmetrical. Further, since the eddy current causes the read antenna to operate normally, the * should be mounted on the metal casing. The loop antenna placed on the housing m cannot be small. The electric field radiates to 1c card, so that the communication range between the IC card and the read/write device is produced. If the ring coil is covered with a resin material, the gasket should be provided with a ^ antenna. Resin between the circuit boards in the housing to avoid the noise caused by the electromagnetic spokes, so the thickness of the housing will be added. The small portable electric, placed for easy portability, has its size limitation. Therefore, any ring line 5 1354936-turn configuration does not ensure that the space of the toroidal coil in the housing is sufficient to suppress the radiation. The electromagnetic field emitted from the loop antenna adversely affects the device such as the circuit board adjacent to the inner wall of the housing, and cannot prevent the metal shell. The body affects the loop antenna. Therefore, the metal container is in poor compatibility with the RFID system. To improve the aforementioned shortcomings, some of the RFID antenna gain improvements have been revealed. The RFID antenna disclosed in U.S. Patent No. 7,161,542 is electrically connected to 1C. a wafer or capacitor 'and is fixed to the object. The antenna includes a planar conductive member having a first side mounted on the object, and a coil body mounted on the second side (relative to the first side) of the conductive member, composed of coil turns The conductive member isolates the coil body from the object. Figures 1 and 2 illustrate an RFID antenna disclosed in U.S. Patent No. 7,161,542. The conductive member 14a uses a sheet, sheet, or film of a conductive material as long as the conductive member 14a has electrical properties, that is, by applying a conductive ink to the back of the non-conductive sheet, sheet, or film 16, and drying it The member which is a conductive coating film is obtained as shown in the enlarged view of Fig. 2. The spiral coil main body 14b uses a conventional coil main body. The coil main body 14b is formed by adjusting the spiral diameter or the number of turns of the coil main body 14b. When the main body 14b is wound around the front end of the conductive member 14a, a preset characteristic value is obtained. When the 1C wafer 13 is connected to both ends of the coil main body 14b, the 1C wafer 13 is directly adhered to the conductive member 4a. The coil main body 14b is fixed. The characteristic value of the antenna 14 of the U.S. Patent No. 7,161,542 is generally changed to the conductive member 14a'. When the coil main body 14b is wound around the conductive member 14&= front end, it is possible to transmit electric waves to the antenna 14 at a preset frequency. The tag 12 is activated. However, in the case of the antenna 14, the coil main body 14b that receives the electric wave at a preset frequency should be wound around the front end of the conductive member 14a. The coil body 14b is not accommodated for the preset frequency. After the im component Ma, its eigenvalue cannot be adjusted. The coil body (10) is fixed to the conductive and is also disclosed in U.S. Patent No. 7,183,987. Providing icZ ft ^ 缞 缞 _,, 3D containing the radiant electromagnetic field of the ϋ coil 31, the C card of the loop coil magnetic ic card #料. The antenna device 3G also includes 2 magnetic sheets 32 opposed to the main side of the receiving ic card. Same as: two or two sides and an asymmetrical winding area with their centers opposite each other, one of which: the vertical direction of the arrow as shown in Fig. 3, 'the annular line width = rrt spacing and width, the lower winding area 3_Interval and ίί2: 磁性 The magnetic sheet 32 is formed in a rectangular shape larger than the toroidal coil 31, and its main side is completely covered with the latter. The antenna device 30 is attached to the magnetic sheet 32 on the main side of the ring_31, and is opposed to the main body of the (four) busy card. Since the toroidal coil 31 is asymmetrical and the field is conditioned by the toroidal coil 31, it can provide a wider communication range between the IC card and the squad, and can also change the communication position in a certain direction. Furthermore, the antenna device 卯 has the magnetic sheet 32 facing the main side of the ring ring 31, and faces the face 1 (the card is in direct opposition to each other, so that only the magnetic side of the main side of the toroidal coil 31 facing the IC card can be lifted. % distribution. The toroidal coil 31 should be made in a special form to adjust it in the installation method to solve the above problem. ... The RFID system antenna device operating in a metal environment is technically feasible, but in practice it has its own Difficulties. The solution is mostly after the partial blockage with the absorbing material, and then the communication between the 1C card and the read/write device using the three-dimensional coil design is greatly increased. The above design is more complicated. In addition, _ heart can increase a lot of inaccuracies (four) the transmission of stray electric cloth by vertical; field distribution, where the magnetic field facets, greatly reduce the metal surface of the metal into a parallel to the metal surface is too large, in order to achieve the impact of the genus However, the aforementioned antenna thick antennas are not suitable for the current degree of demand. 'Traditional thickness of RFID proposed - can be in the era of metal production. Therefore, the present invention solves the current conventional technology non-contact 1c card system [ SUMMARY OF THE INVENTION Some features of the paragraphs of this paragraph, other features will be described in the subsequent paragraph as a reference to the additional (4) patent scope definition, which is incorporated in this paragraph 1C = the purpose is to provide a non-contact for the card reader A 1C chip that performs contactless identification, is connected to the IC main antenna, and sends signals to and from the card reader, and at least one open antenna on the main antenna to increase the gain of the main antenna. According to the present concept, the signal is a radio frequency signal. According to the present invention, the main antenna and the open antenna are planar antennas. The group line = this turn, wherein the main antenna and the open circuit (four) include a pair of winding The winding coil end of the open-circuit antenna is connected to (10) 1354936. According to the present invention, the non-contact 1C card system further includes a shielding member for reducing interference caused by the metal object being placed in the metal environment. The member is disposed between the metal object and the main antenna. Μ According to the present invention, the open antenna is disposed between the main antenna and the shielding member According to the present concept, the open antenna is disposed on the main antenna and the shielding member. The main purpose of the present invention is to provide a non-contact 1C card system for communicating with a card reader in a metal environment, including a 1C chip for performing contactless identification. And connected to the main antenna of the IC chip to send signals to and from the card reader, the shielding member disposed between the metal environment and the main antenna, to reduce interference caused by the metal environment, and disposed between the main antenna and the shielding member a first open antenna, and a second open antenna disposed on the main antenna and the shielding member, wherein the first open antenna and the second open antenna increase a gain of the main antenna to reluctant electromagnetic induction of the main antenna. The signal is a radio frequency signal. According to the present invention, the main antenna and the open antenna are planar antennas. According to the present invention, the main antenna, the first open antenna, and the second open antenna each include a pair of winding coil ends. According to the present invention, the winding coil ends of the first and second open antennas correspond to the main antenna winding coil ends. 9 1354936 - [Embodiment] FIG. 4 illustrates a first embodiment of an antenna device for a non-contact integrated circuit (1C) card system in a metal environment according to the present invention. As shown in Fig. 4, a non-contact type 1C card system that communicates with a card reader (not shown) includes a 1C wafer 44, a main antenna 42, a shield member 41, and an open antenna 43. The main antenna 42 is connected to the ic chip 44 by a pair of winding coil ends 421, and the radio frequency signals are fed into and out of the card reader so that the IC chip 44 can perform contactless recognition with the read card machine. The shield member 41 is disposed between the metal environment and the main antenna 42 to reduce interference due to the metal environment. The open antenna 43 may be disposed between or above the main antenna 42 and the shield member 41 to increase the gain of the main antenna to enhance the electromagnetic induction of the main antenna. In the present embodiment, the open antenna 43 is disposed above the main antenna 42 and the shield member 41. In this embodiment, the 'contactless IC card system is a radio frequency identification (RFID) system. The contactless IC card system enables payment for the mass transit system, credit card transactions, access to access control system data, and the like. The open antenna 43 differs from the main antenna 42 in that the latter is conductively connected to the IC wafer 44. In the context of the invention, the shield member 41 can be a sheet, sheet, or conductor in the form of a film. The shielding member 41 may also be a soft magnetic member. Further, the magnetic member may be formed of at least one of a fast curing material, a pound material, a rolled material, a forged material, and a sintered material, each of the materials including at least one crystal alloy. Magnetic steel, niobium steel, iron aluminum alloy, and soft magnetic ferrite. Meanwhile, the magnetic member contains (1) ferrite or metal flakes or fine particles, and (2) a composite material of plastic or rubber, or a coating film including flakes or fine particles containing ferrite or metal. In addition, the magnetic member may be an adhesive sheet composed of gold or soft magnetic ferrite, and the sheets are adhered to each other by close contact with each other by adhering a plurality of sheets to the surface of the bottom material sheet composed of plastic. In the first embodiment shown in Fig. 4, the open antenna 43 is disposed above the main antenna 42. In practical applications, an open antenna may be disposed between the main antenna 42 and the shield member 41. The main antenna 42 and the open antenna 43 are insulated, and the wound coil can be covered with a clad sheet of plastic to adhere the wound coil and the wound coil and the clad sheet to obtain the open antenna 43. • The invention may comprise at least one open antenna. Referring to Figure 5, a second embodiment of a non-contact 1C card system for use in a metal environment is illustrated. In the present embodiment, the non-contact type 1C card system includes an IC chip 54, a main antenna 52, a shield member 51, and two open antennas 53a and 53b provided on the main antenna 52. At the same time, the main antenna 52 and the open antennas 53 & and 531) are shielded by the shield member 51, and the interference due to the metal environment is also reduced. The open antenna differs from 53b and main antenna 52 in that main antenna 52 is conductively connected to Ic wafer 54. The present invention can be applied to a portable communication device such as a mobile phone, and thus the above metal environment can be caused by a mobile phone battery disposed between the shield member 51 and the main wafer 54. Figure 6 illustrates a third embodiment of a contactless IC card system for use in a metal environment. In the present embodiment, the non-contact IC card system includes an Ic chip 64, a main antenna 62, a shield member 61, and two open antennas 6 and 63b. The open antenna 63a is disposed between the main antenna 62 and the shield member 61, and the antenna 63b is disposed above the main antenna 62 and the shield member 61. Khan 11 1354936 The main antenna 62 and the open antennas 63a and 63b are shielded by the shield member 61 to reduce the interference caused by the metal environment. The open antenna 63a disk 63b and the main antenna 62*_ are in the latter conductively connected to the IC wafer 64. Similarly, the contactless 1C card system is a curry system. In this embodiment, the non-contact 1C card system can be applied to a mass transit system, an access control system, a credit card transaction, and the like. Further, the main antenna 62 and the open antennas 仏 and 63b are insulated from each other. Therefore, the overall structure of the antenna can avoid the influence of the metal object by the shielding member and expand the range of the communication induction by the additional open antenna. Non-contact 1C card systems typically do not include shield members, and non-contact 1C card systems do not necessarily have to be in close proximity to metal objects such as cell phone batteries. The main antenna and the open antenna of the present invention are planar antennas each having a pair of winding coil ends. Furthermore, the position of the winding coil end of the open antenna corresponds to the winding coil end of the main antenna. In summary, the present invention discloses an open antenna of a non-contact type C card system to increase the gain of the main antenna to enhance the electromagnetic induction of the main antenna. When the non-contact 1C card system is placed in a metal environment such as a mobile phone, the interference effect caused by the metal object can be reduced. When the non-contact IC card system is not placed in a metal environment, the communication range with the card reader is increased. At the same time, the open antenna can adjust the frequency of the main antenna according to different needs. The present invention has been described in detail by the above-described embodiments, and may be modified by those skilled in the art without departing from the scope of the appended claims. 12 1354936 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a conventional RFID tag for an antenna; FIG. 2 is a cross-sectional view taken along line A_A of FIG. 1; Figure 1 is a first embodiment of an antenna device for a non-contact 1C card system in a metal environment; Figure 5 is a diagram showing a non-contact type 1C of the present invention; A second embodiment of the card system; and Figure 6 illustrates a third embodiment of the contactless 1C card system of the present invention. [Main component symbol description] 12 Tag 13 IC chip 14 Antenna 14a Conducting member 14b Coil body 16 Film 30 Antenna device 31 Ring coil 31a Upper winding region 31b Lower winding region 32 Magnetic sheet 41 Shield member 42 Main antenna 421 Winding coil end 43 Open circuit Antenna 44 1C wafer 51 shield member 52 main antenna 53a open antenna 53b open antenna 54 1C wafer 61 shield member 62 main antenna 63a open antenna 63b open antenna 64 1C wafer 13