201101583 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種接收自發射器發射之磁場，與該發 射器感應麵合而可進行通訊之天線裝置。 【先前技術】 習知，作為 RFID(Radi〇 Frequency Identification，射頻 識別）用之天線模組，有如下數種類。第一、使用 FPC(Flexible Printed Circuit，撓性印刷電路）或剛性基板將 ?線圈圖案作成於平面上之天線模組。第二，將圓形線作為 、.堯線以作成線圈之天線模組。第三、將Fpc或BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device that receives a magnetic field emitted from a transmitter and that is inductively coupled to the transmitter to communicate. [Prior Art] Conventionally, as an antenna module for RFID (Radio Frequency Identification), there are the following types. First, the coil pattern is formed on the planar antenna module using a FPC (Flexible Printed Circuit) or a rigid substrate. Second, the circular line is used as the antenna module of the coil. Third, the Fpc or
Flat Cable ’軟排線）作料線，並將該導線作成環狀以形成 線圈之天線模組。 上述天線模組，係根據考慮零件之配置、形狀之設計， 適當選擇後將其組裝於電子機器來使用。 於電子機器内配置天線模組時，為避免受到電子機器 〇之金屬製筐體或内部零件所使用之金屬之影響，係於天線 周邊安裝磁導率較高 千权q相失係數較小之鐵氧體製之磁性片 材（專利文獻1)。 、如此，精由將磁氣特性良好之鐵氧體製之磁性片材配 置成重宜於天線換組，以防止因磁場進入配置於天線模組 周圍之金屬内形成渦電流而轉變成熱。又，為獲得良好通 訊性能，將鐵氧體製之磁性片^ 庄月材進仃形狀或組合等之最佳 化。又，由於行動電話等可攜式電子機器趨於薄型化，因 此於天線模組與鐵氧體製之磁性片材貼合後之狀態下， 3 201101583 期望能盡量薄型化。 [專利文獻1]日本特開第2006-310812號公報 【發明内容】 如上述，為防止在電子機器内產生渦電流及熱，有於 將天線以FPC等具撓性之電子材料設成平面形狀而作成之 天線基板，安裝鐵氧體製等之磁性片材之情形。 從尺寸之觀點而言，為將天線薄型化，能將鐵氧體構 成曰#著構成層、及Fpc層分別力口以薄型化來對應，從 通Λ特[生之觀點而言，由於受到金屬筐體之影響，從而較 佳係將天線圖案與磁性片材間之距離盡量擴大。例如，如 圖8(Α)所示，在使天線圖案401與磁性片材402黏著之ADH : 之厚度°又成變數d[ “ m]而變化之情形，如圖8(B)所 、越j則可通汛距離越小。此係若使形成於天線圖案與 磁性片材間之AOH ® 4 is & 曰之厚度變薄，會使天線電阻上升，因 而使通訊性能亞仆令从 、 〜、之故。如此，若僅使各構件變薄，會有 通§fl性能惡化之問題。 因此’本發明係有鑑於此實際情況而提出，其目的在 於提供一種可維持涵印ω 子^ efL特性、且可謀求整體薄型化之天線 裝置。 為解決上述問題，本發 不發明之天線裝置，包含：天線基 板，於絕緣層表面構#古 稱裝有天線線圈，該天線線圈接收從發 射器發射之磁場，輿兮61 興該發射器感應耦合而能進行通訊； 磁性片材’係透過黏著， 層黏耆於該天線基板之未構裝 線圈之絕緣層之面，將 以天線 婿攸该發射器發射之磁場導入該天線 4 201101583 . 線圈。 . [發明效果] 本發明，由於在天線基板之未構裝天線線圈之絕緣層 之面’透過黏著層黏著磁性片材，因此，可使用天線線圈 表面構裝之絕緣部，作為將天線圖案與磁性片材間分離之 構件，故可謀求整體之薄型化、且實現良好之通訊特性。 【實施方式】 〇 以下，參照圖式詳細說明用以實施本發明之形態。此 外，本發明並不限於以下實施㈣，s所當然，在不脫離 本發明之要旨範圍内，可進行各種變更。 適用本發明之天線模組，係利用在與發射電磁波之發 射器間所產生之電磁感應而形成可通訊狀態之裝置，其係 例如組裝於圖1所示之RFID(Radi0 Fre㈣ncyThe Flat Cable 'soft-wire' is the production line and the wire is looped to form the antenna module of the coil. The antenna module is appropriately selected and assembled into an electronic device according to the design of the arrangement and shape of the components. When the antenna module is placed in an electronic device, in order to avoid the influence of the metal used in the metal casing or the internal components of the electronic device, the magnetic permeability is higher than that of the antenna, and the phase loss coefficient is small. Magnetic sheet of ferrite system (Patent Document 1). In this way, the ferromagnetic magnetic sheet having good magnetic characteristics is configured to be suitable for antenna replacement, so as to prevent the magnetic field from entering the metal disposed around the antenna module and forming an eddy current to be converted into heat. Further, in order to obtain good communication performance, the magnetic sheet of the ferrite system is optimized in shape or combination. In addition, since portable electronic devices such as mobile phones tend to be thinner, 3 201101583 is expected to be as thin as possible after the antenna module is bonded to the magnetic sheet of the ferrite system. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2006-310812. SUMMARY OF THE INVENTION As described above, in order to prevent eddy currents and heat from being generated in an electronic device, the antenna is formed into a planar shape by a flexible electronic material such as FPC. On the other hand, the antenna substrate is mounted with a magnetic sheet such as a ferrite system. From the viewpoint of size, in order to reduce the thickness of the antenna, it is possible to reduce the thickness of the ferrite constituting layer and the FPC layer, and to reduce the thickness of the FPC layer. The influence of the metal casing is preferably such that the distance between the antenna pattern and the magnetic sheet is maximized. For example, as shown in FIG. 8(Α), in the case where the thickness ° of the ADH: which adheres the antenna pattern 401 and the magnetic sheet 402 is changed by the variable d["m], as shown in FIG. 8(B), j can be made smaller by the distance. If the thickness of AOH ® 4 is & 形成 formed between the antenna pattern and the magnetic sheet is thinned, the antenna resistance will rise, and the communication performance will be subordinated. Therefore, if only the members are thinned, there is a problem that the performance of the FF is deteriorated. Therefore, the present invention has been made in view of the actual situation, and an object thereof is to provide an OV that can be maintained. An antenna device capable of reducing the overall thickness of the efL. In order to solve the above problems, the antenna device of the present invention comprises: an antenna substrate, which is provided with an antenna coil on the surface of the insulating layer, and the antenna coil receives the emission from the antenna The magnetic field emitted by the device can be communicated by inductive coupling of the emitter; the magnetic sheet is adhered to the surface of the insulating layer of the unstructured coil of the antenna substrate by the adhesive, and the antenna is The magnetic field emitted by the emitter is introduced Antenna 4 201101583 . Coil. [Effect of the Invention] In the present invention, since the magnetic sheet is adhered through the adhesive layer on the surface of the insulating layer of the antenna substrate on which the antenna coil is not mounted, the insulating portion of the surface of the antenna coil can be used. As a member for separating the antenna pattern from the magnetic sheet, it is possible to reduce the overall thickness and achieve good communication characteristics. [Embodiment] Hereinafter, a mode for carrying out the invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments (4), and it is a matter of course that various modifications can be made without departing from the gist of the invention. The antenna module to which the present invention is applied is used between an emitter that emits electromagnetic waves and the like. Electromagnetic induction forms a communicable device, which is assembled, for example, in the RFID shown in FIG. 1 (Radi0 Fre(n)ncy
IdennficaHon’射頻識別）用之無線通訊系統ι〇〇而使用。 無線通訊系統1〇〇，係由適用本發明之天線模組i、及 〇 對天線模組1進行存取之讀寫器2所構成。 θ項寫益2，具備：天線2a ’作為用以對天線模組上發射 磁场之發射器，具體而言，朝天線A組1發射磁場；及控 ,土板2b，係與經由天線2a而感應耦合之天線模組1進行 通訊。 F讀寫器2，配設有與天線2a形成電氣連接之控制 路曰 在該控制基板2b，構裝有由1個或複數個積體電 々 等電子零件所構成之控制電路。該控制電路，根據 "線模、、且1接收之資料，執行各種處理。例如，控制電 5 201101583 路在將資料寫入天線模組1時，將資料編碼，根據編碼 後之資料，進行既定頻率（例如13 56MHz)之載波之調變， 然後將調變後之調變訊號放大，以放大後之調變訊號驅動 天線2a又控制電路，在從天線模組丨讀取資料時，將 以天線2a接收之資料之調變訊號放大，將放大後之資料之 調變訊號解調，然後將解調後之資料解碼。又，控制電路， 係使用一般之讀寫器所使用之編碼方式及調變方式，例 如，使用曼徹斯特（Manchester)編碼方式或ASK(AmpHtude Shift Keying，振幅移位鍵控）調變方式。 組裝於電子機器之筐體3内部之天線模組丨，具備：天 線基板11，構裝有能在與感應耦合之讀寫器2間進行通訊 之天線線圈11a;及磁性片材12，為將磁場導入天線線圈 1 la而形成於與天線基板丨丨重疊之位置。在組裝天線模組工 之電子機器内部，組裝有利用流經天線線圈i la之電流，進 行與項寫器2間之通訊之通訊處理部4。 在天線基板11，例如構裝有藉由將軟排線等撓性導線 進行圖案化處理等而形成之天線線圈丨la、及用以將天線線 圈Ua與通訊處理部4電氣連接之端子部ub。 天線線圈1 la，當接收到從讀寫器2發射之磁場，則與 讀寫器2 ϋ由感應耗合而形成磁柄合，才妾收調變後之電磁 波，然後經由端子部1 lb將接收訊號供應至通訊處理部4。 磁性片材12,形成於與天線基板n重疊之位置，將從 讀寫器2發射之磁場導入天線線圈Ua。具體而纟，磁性片 材12設成如下構造，為抑制設於可攜式電子機器之筐體3 201101583 内部之金屬零件使從讀寫器2發射之磁場散射、及產生渦 電"IL ’因而將其貼合於磁場釋放方向之相反側。 通訊處理部4，以流於天線線圈11 a之電流驅動，與讀 寫器2間進行通訊。具體而言，通訊處理部4，將接收到之 調變訊號解調，將解調後之資料解碼，然後將解碼後之資 料寫入該通訊處理部4所具有之内部記憶體。又，通訊處 理部4,將待傳送至讀寫器2之資料從内部記憶體讀取，將 項取後之資料編碼，根據編碼後之資料將載波調變，經由 利用感應耦合而形成磁耦合之天線線圈丨丨a，將調變後之電 波傳送至讀寫器2。 在由以上構成之無線通訊系統1〇〇，以下，著眼於天線 模組1之構成加以說明。 本實施形態之天線模組丨，就從謀求模組整體之薄型 化、且實現良好之通訊特性之觀點而言，為如圖2所示之 構成。 即，天線基板11，係可從上下兩面與導線連接之雙存 取型之配線板’具體而[如冑2所示，其係在由聚酿亞 胺構成之絕緣層112表面，依序積層有由高導電性之Cu等 構成之導電性金屬層u丨、用以被覆導電性金屬層1 Η之 Au/Ni等之具有耐腐蝕性之耐腐蝕性金屬層113而成。在如 此構成之天線基板11，對導電性金屬層m、耐腐蝕性金 屬層113施以圖案化（patterning)處理等，藉此，在絕緣層 112表面構裝上述天線線圈Ua。 磁性片材12,例如係由鐵氧體板等之損失係數小且能 7 201101583 效率佳地將磁場導人天線線圈ua之磁性材料構成，在天線 基板11之未構裝天線線圈lla之絕緣層U2之面112a，透 過ADH等絕緣性之黏著層13黏著。 又’天線模組1，係在天線基板U之未構裝天線線圈 lla之絕緣層112之面U2a側’設有與天線線圈山電氣 連接之端子部"b。天線模組！，經由端子部m，將天線 線圈山與通訊處理部4電氣連接。具體而言，端子部爪 係由高導電性之Au/Ni形成。 如以上構成之天線模組1，在天線基板U之未構裝天 線線圈山之絕緣層112之面112a，透過黏著層13黏著磁 性片材12。因此，在天線模組卜黏著層13與絕緣層⑴， 係作為用以使天線線圈i la _磁性片材12間分離之厚度d 所定義之構件而發揮作用。如此，天線模組i，由於能^用 天線線圈Ua表面構裝之絕緣層112，作為用以使天線線圈 11卜磁性U 12間分離之厚度d所定義之構件，故可謀求 整體之薄型化、且實現良好之通訊特性。 一尤其，為避免受到從讀寫器2所發射磁場之影響，在 黏著有天線基板1 1之磁性片材内側配置通訊處理部*，為 使通訊處理部4與天線線圈lla形成電氣連接，而在磁性片、 材U側設置端子部llb之情形，天線模組ι，相較於使用 :3所示之比較例之單一存取型之配線板之天線模組_， 月&謀求整體之薄型化。 、即，天線模組200，如圖3所示，係將僅能於單面與導 線連接之單-存取喊板21〇、與透㈣著層22()黏著磁性 201101583 片材230予以黏著而成。單一存取配線板21〇’係在由聚醯 亞胺構成之絕緣層211表面，依序積層由高導電性之Cu構 成之導電性金屬層212、由用以被覆導電性金屬層212之絕 緣構件構成之抗蝕層213而成。又，在抗蝕層213形成有 利用银刻處理形成開口、由能與導電性金屬層212電氣連 接之Au/Ni構成之端子部213a。此天線模組2〇〇，為確保於 磁性片材23 0側天線模組2〇〇之導電性金屬層212與通訊 〇 處理部之連接，因而以磁性片材230之面為基準，依序積 層黏著層220、抗蝕層213、導電性金屬層212、絕緣層211， 在抗韻層213設有端子部213a。天線模組2〇〇，黏著層22〇 •^、抗姓層2 1 3係作為以將天線線圈11 a _磁性片材2 3 〇間分 離之厚度d所定義之構件而發揮作用。 以上構成之天線模組2〇〇，係與本實施形態之天線模組 1不同，由於絕緣層211並未作為以將天線線圈i la -磁性 片材230間分離之厚度d所定義之構件而發揮作用，故整 〇體厚度變厚。因此，在將天線線圈_磁性片材間之間隔設 成相同條件之情形，天線模組丨，相較於天線模組2〇〇，能 謀求模組整體之薄型化。 一"个鬥，隹構裒於絕 緣層112表面之天線線圈lla雖未施以使用絕緣材料之抗敍 處理’在組裝於電子機器等之際，就與讀寫器2進行通訊 之觀點而言’由於在筐體至天線線圈"a之空間並未配置電 子電路等導電構件，故可謀求模組整體之薄型化、且能作 為天線線圈11a而發揮作用。 9 201101583 尤/、本案之發明人等發現，根據下述實施例，藉由 將天、=線圈—磁性片材間之間隔配置成在至55[# m]之範圍内分離’能使天線模組1較天線模組2〇〇實現模 組整體之薄型化、及良好之通訊特性。 <對應於天線線圈—磁性片材間之通訊特性變化〉 有關對應於天線線圈_磁性片材間之間隔之通訊特性 變化，參照圖4進行說明。圖4係表示在天線模組（使天 線線圈11a與磁性片材23〇間之距離在2〇〜14〇#m變化 時’以下述式（1)所算出之q值之變化。 Q= ω L/R…⑴IdennficaHon' radio frequency identification is used by the wireless communication system. The wireless communication system is composed of an antenna module i to which the present invention is applied, and a reader/writer 2 that accesses the antenna module 1. The θ term writes 2, having: the antenna 2a' as a transmitter for transmitting a magnetic field on the antenna module, specifically, transmitting a magnetic field toward the antenna A group 1; and controlling, the earth plate 2b is connected to the antenna 2a via the antenna 2a The inductively coupled antenna module 1 communicates. The F reader/writer 2 is provided with a control circuit for electrically connecting to the antenna 2a. The control board 2b is provided with a control circuit composed of electronic components such as one or a plurality of integrated circuits. The control circuit performs various processes in accordance with the "line mode, and the data received by 1. For example, when the control data 5 201101583 is written into the antenna module 1, the data is encoded, and according to the encoded data, the carrier frequency of the predetermined frequency (for example, 13 56 MHz) is modulated, and then the modulation is modulated. The signal is amplified, and the amplified modulation signal drives the antenna 2a and the control circuit. When reading data from the antenna module, the modulation signal of the data received by the antenna 2a is amplified, and the amplified data is modulated. Demodulation, and then decoding the demodulated data. Further, the control circuit uses a coding method and a modulation method used by a general reader/writer, and for example, a Manchester coding method or an ASK (AmpHtude Shift Keying) modulation method is used. The antenna module 组装 assembled in the casing 3 of the electronic device includes an antenna substrate 11 configured to be coupled with an antenna coil 11a capable of communicating between the inductively coupled reader/writer 2, and a magnetic sheet 12 for The magnetic field is introduced into the antenna coil 1 la and formed at a position overlapping the antenna substrate 丨丨. Inside the electronic device in which the antenna module is assembled, a communication processing unit 4 that performs communication with the item writer 2 by using a current flowing through the antenna coil i la is assembled. The antenna substrate 11 is provided with, for example, an antenna coil 丨1a formed by patterning a flexible lead wire such as a flexible wire, and a terminal portion ub for electrically connecting the antenna coil Ua and the communication processing unit 4 . When receiving the magnetic field emitted from the reader/writer 2, the antenna coil 1 la is combined with the reader/writer 2 to form a magnetic handle, and then the modulated electromagnetic wave is collected, and then the terminal portion 1 lb will be The reception signal is supplied to the communication processing unit 4. The magnetic sheet 12 is formed at a position overlapping the antenna substrate n, and introduces a magnetic field emitted from the reader/writer 2 into the antenna coil Ua. Specifically, the magnetic sheet 12 is configured to suppress scattering of a magnetic field emitted from the reader/writer 2 and to generate eddy currents in order to suppress metal parts provided inside the casing 3 201101583 of the portable electronic device. It is thus attached to the opposite side of the direction in which the magnetic field is released. The communication processing unit 4 is driven by a current flowing through the antenna coil 11a to communicate with the reader/writer 2. Specifically, the communication processing unit 4 demodulates the received modulated signal, decodes the demodulated data, and writes the decoded data into the internal memory of the communication processing unit 4. Moreover, the communication processing unit 4 reads the data to be transmitted to the reader/writer 2 from the internal memory, encodes the data after the item is taken, modulates the carrier according to the encoded data, and forms a magnetic coupling by using inductive coupling. The antenna coil 丨丨a transmits the modulated electric wave to the reader/writer 2. In the wireless communication system 1 configured as above, the following description will focus on the configuration of the antenna module 1. The antenna module of the present embodiment has a configuration as shown in Fig. 2 from the viewpoint of achieving a thin overall module and realizing good communication characteristics. That is, the antenna substrate 11 is a double-access type wiring board which can be connected to the wires from the upper and lower surfaces, and specifically, as shown in FIG. 2, it is laminated on the surface of the insulating layer 112 made of polyacrylonitrile. The conductive metal layer u consisting of highly conductive Cu or the like is used to coat the corrosion-resistant metal layer 113 having corrosion resistance such as Au/Ni of the conductive metal layer 1 . In the antenna substrate 11 configured as described above, the conductive metal layer m and the corrosion-resistant metal layer 113 are subjected to patterning treatment or the like, whereby the antenna coil Ua is mounted on the surface of the insulating layer 112. The magnetic sheet 12 is made of, for example, a ferrite plate or the like having a small loss coefficient and capable of efficiently magnetically guiding the magnetic field of the antenna coil ua, and the insulating layer of the antenna substrate 11 having the antenna coil 11a unmounted. The surface 112a of U2 is adhered through an insulating adhesive layer 13 such as ADH. Further, the antenna module 1 is provided with a terminal portion "b electrically connected to the antenna coil mountain on the side U2a side of the insulating layer 112 of the antenna substrate U on which the antenna coil 11a is not mounted. Antenna module! The antenna coil mountain is electrically connected to the communication processing unit 4 via the terminal portion m. Specifically, the terminal portion claws are formed of highly conductive Au/Ni. In the antenna module 1 configured as described above, the magnetic sheet 12 is adhered to the surface 112a of the antenna substrate U on the insulating layer 112 of the antenna coil mountain. Therefore, the antenna module adhesive layer 13 and the insulating layer (1) function as members defined by the thickness d for separating the antenna coils i la - magnetic sheets 12 from each other. In this way, the antenna module i can be used as the member for defining the thickness d of the antenna coil 11 and the magnetic U 12 separated by the insulating layer 112 on the surface of the antenna coil Ua, so that the overall thickness can be reduced. And achieve good communication characteristics. In particular, in order to avoid the influence of the magnetic field emitted from the reader/writer 2, the communication processing unit* is disposed inside the magnetic sheet to which the antenna substrate 11 is adhered, so that the communication processing unit 4 and the antenna coil 11a are electrically connected. In the case where the terminal portion 11b is provided on the magnetic sheet and the material U side, the antenna module ι is compared with the antenna module of the single access type wiring board of the comparative example shown in FIG. 3, and the month & Thin. That is, the antenna module 200, as shown in FIG. 3, is capable of adhering only to the single-access shunt board 21 单 connected to the single-sided wire and the (four) layer 22 () adhesive magnetic 201101583 sheet 230. Made. The single access wiring board 21' is formed on the surface of the insulating layer 211 made of polyimide, and sequentially laminated with a conductive metal layer 212 made of highly conductive Cu and insulated by the conductive metal layer 212. The resist layer 213 is formed of a member. Further, in the resist layer 213, a terminal portion 213a formed of Au/Ni which can be electrically connected to the conductive metal layer 212 by forming an opening by silver etching is formed. In the antenna module 2, in order to ensure the connection between the conductive metal layer 212 of the antenna module 2 on the magnetic sheet 23 0 side and the communication processing unit, the surface of the magnetic sheet 230 is used as a reference, in order. The adhesive layer 220, the resist layer 213, the conductive metal layer 212, and the insulating layer 211 are laminated, and the terminal portion 213a is provided in the rhyme-resistant layer 213. The antenna module 2A, the adhesive layer 22, and the anti-surname layer 2 1 3 function as members defined by the thickness d separating the antenna coil 11 a - the magnetic sheet 2 3 . The antenna module 2A configured as described above is different from the antenna module 1 of the present embodiment in that the insulating layer 211 is not used as a member defined by the thickness d separating the antenna coil i la - the magnetic sheet 230. It plays a role, so the thickness of the whole body becomes thicker. Therefore, in the case where the interval between the antenna coil and the magnetic sheet is set to the same condition, the antenna module can be made thinner than the antenna module 2, as a whole. In the case where the antenna coil 11a on the surface of the insulating layer 112 is not subjected to the anti-snag treatment using an insulating material, it is communicated with the reader/writer 2 when assembled in an electronic device or the like. In the space of the casing to the antenna coil, a conductive member such as an electronic circuit is not disposed, so that the entire module can be made thinner and can function as the antenna coil 11a. 9 201101583 In particular, the inventors of the present invention found that, according to the following embodiments, the antenna pattern can be configured by separating the interval between the coil and the magnetic sheet to be separated in the range of 55 [# m]. Group 1 is thinner than the antenna module 2 and has good communication characteristics. <Corresponding to changes in communication characteristics between the antenna coil and the magnetic sheet> The change in communication characteristics corresponding to the interval between the antenna coil and the magnetic sheet will be described with reference to Fig. 4 . Fig. 4 is a diagram showing changes in the q value calculated by the following equation (1) when the antenna module (the distance between the antenna coil 11a and the magnetic sheet 23 is changed from 2 〇 to 14 〇 #m). Q = ω L/R...(1)
此處，w[rad/s]係天線線圈Ua之角頻率，LUH]係天 線線圈11a之電感值，R[Q]係天線線圈Ua之電阻值。Q 值係用以評價通訊特性之指標，表示若該值越大則通訊感 度越佳、最大可通訊距離越大。 又，圖4中，構成天線線圈1丨a之導電性金屬層，係膜 厚為35Um]’ =1、5、10分別為鐵氧體製之磁性片材 12之複磁導率比之虛數部。 圖4中表示，若天線線圈-磁性片材間之間隔更接近 則Q值更惡化。即，其係表示若使該間隔變窄以 使天線模組整體薄型化’導致特性惡化。相對於此，若使 天線線圈-磁性片材間之間隔大於50〜55[# m]則Q值變 大，如圖4所示，在l〇〇[/z m]程度以上雖穩定，但，就薄 型化之觀點而言並不理想。 因此’就實現模組整體之薄型化及良好之通訊特性之 201101583 觀點而言’以使天線線圈—磁性片材間之間隔在5 〇 [从m] 至5 5 [# m]之範圍内變化作為制約條件，具體作成如下述之 天線模組。 <天線模組之設計條件> 以下’係使用圖5(A)、（B)所示之天線基板1〇1製作天 線模組。 即’天線基板101，如圖5(A)所示，其外觀形狀為36[mm] X29[mm]、厚度為0.09[mm]，且構裝如下之天線線圈102 及端子部103。又，天線線圈丨〇2,係捲繞成寬度為〇 31[mm] 之導線’於鄰接之導線間〇_ 12[mm]之空間，即，圖案間距 為〇.42[mm]、繞組數為4。 磁性片1 04，係配置成與天線線圈丨〇2之外觀形狀一 致，如圖5(B)所示，其形狀為36[mm]x29[mm]之大致矩形。 又，磁性片材，係使用振盪頻率為13 56MHz之磁場之複磁 導率比如下述值之鐵氧體板。即，鐵氧體板係使用複磁導 ❹率比之實數部；/，為119、虛數部"，，為133。 根據上述條件，分別將模組整體之厚度設成相同程 度，將對應於天線模組1之天線模組A作為實施例，而將 對應於天線模組200之天線模組b作為比較例，以如下方 式作成。 <天線模組A > 天線模組A，係使用如下之雙存取型之配線板。即，在 膜厚為25 之由聚醯亞胺構成之絕緣層表面，積層膜厚 為50心之由Cu構成之導電性金屬層而成。天線模組a , 201101583 係調整黏著層之厚度以使天線線圈_磁性片材間之間隔為 55[ # m]，然後將天線基板之絕緣層與磁性片材黏著而2 <天線模組B > 天線模組B，係使用如下之單一存取型之配線板。即， 在膜厚為25/zm之由聚醯亞胺構成之絕緣層表面，依序積 層膜厚為35 之由Cu構成之導電性金屬層、由膜厚為 15 構成之抗蝕層而成。天線模組B’藉調整黏著層之厚 度以使天線線圈-磁性片材間之間隔為5.m]，_黏著 天線基板之抗蚀層與磁性片材而成。 <評價> 有關上述天線模組A、B，使用下述表1，針對形狀與 通讯特性進行評價。在此，「FPC」係指天線基板之整體厚 度，「間隔」係指天線線圈-磁性片材間之間隔，「τ_」 係指模組之整體厚度’「最大可通訊距離」如目6所示，」 係指振蓋頻率為13·56[廳]時，讀寫器與天線模組間可通 机之最大距離之值，該值越大則通訊特性越佳。#體而言， 「最大可通訊距離」，如圖6所示’係使用索尼股份J限 公司製之型號RC-S440C之非接觸型化卡讀寫器如，在 與具有天線基板3〇2a之天線模組3〇2之磁性片材鳩側距 離2麵之位置，設有5Gx⑽[叫之不鱗鋼&如作為模擬 之電子基板之條件下進行測定所得者。 12 201101583Here, w[rad/s] is the angular frequency of the antenna coil Ua, LUH is the inductance value of the antenna coil 11a, and R[Q] is the resistance value of the antenna coil Ua. The Q value is an indicator for evaluating the communication characteristics, indicating that the larger the value, the better the communication sensitivity and the larger the maximum communication distance. Further, in Fig. 4, the conductive metal layer constituting the antenna coil 1A has a thickness of 35 Um]' = 1, 5, and 10 is an imaginary part of the complex magnetic permeability ratio of the magnetic sheet 12 of the ferrite system. . As shown in Fig. 4, if the interval between the antenna coil and the magnetic sheet is closer, the Q value is further deteriorated. That is, it is shown that if the interval is made narrow so that the entire antenna module is made thinner, the characteristics are deteriorated. On the other hand, when the interval between the antenna coil and the magnetic sheet is larger than 50 to 55 [# m], the Q value becomes large, and as shown in FIG. 4, although it is stable at a level of 10 〇〇 [/zm] or more, It is not ideal from the viewpoint of thinning. Therefore, 'in terms of the 201101583 point of view of achieving thinness of the module as a whole and good communication characteristics, the distance between the antenna coil and the magnetic sheet varies from 5 〇 [from m] to 5 5 [# m]. As a constraint, an antenna module as described below is specifically created. <Design Conditions of Antenna Module> Hereinafter, an antenna module is produced using the antenna substrate 1〇1 shown in Figs. 5(A) and 5(B). In other words, the antenna substrate 101 has an outer shape of 36 [mm] X29 [mm] and a thickness of 0.09 [mm] as shown in Fig. 5(A), and the following antenna coil 102 and terminal portion 103 are assembled. Further, the antenna coil 丨〇2 is wound into a space of a width 〇31 [mm] between the adjacent wires 〇 12 [mm], that is, the pattern pitch is 〇.42 [mm], the number of windings Is 4. The magnetic piece 104 is arranged to conform to the external shape of the antenna coil 2, and as shown in Fig. 5(B), its shape is a substantially rectangular shape of 36 [mm] x 29 [mm]. Further, the magnetic sheet is a ferrite plate having a complex magnetic permeability of a magnetic field having an oscillation frequency of 13 56 MHz, for example, the following values. That is, the ferrite plate system uses a complex magnetic permeability ratio of the real part; /, 119, imaginary part ", is 133. According to the above conditions, the thickness of the entire module is set to the same level, and the antenna module A corresponding to the antenna module 1 is taken as an embodiment, and the antenna module b corresponding to the antenna module 200 is used as a comparative example. Create as follows. <Antenna module A > The antenna module A uses the following double access type wiring board. Namely, the surface of the insulating layer made of polyimide consisting of a film thickness of 25 was formed by a conductive metal layer made of Cu of 50 cores. The antenna module a, 201101583 adjusts the thickness of the adhesive layer so that the interval between the antenna coil and the magnetic sheet is 55 [#m], and then the insulating layer of the antenna substrate is adhered to the magnetic sheet. 2 < Antenna module B > Antenna module B uses the following single access type wiring board. That is, a conductive metal layer made of Cu and a resist layer made of a film thickness of 15 are laminated on the surface of the insulating layer made of polyimide by a thickness of 25/zm. . The antenna module B' is formed by adjusting the thickness of the adhesive layer so that the interval between the antenna coil and the magnetic sheet is 5.m], the resist layer of the antenna substrate and the magnetic sheet are adhered. <Evaluation> Regarding the antenna modules A and B described above, the shape and communication characteristics were evaluated using Table 1 below. Here, "FPC" refers to the overall thickness of the antenna substrate, "interval" refers to the spacing between the antenna coil and the magnetic sheet, and "τ_" refers to the overall thickness of the module '"maximum communicable distance". "," means the maximum distance between the reader and the antenna module when the vibrating frequency is 13.56 [hall]. The larger the value, the better the communication characteristics. #体, "Maximum communicable distance", as shown in Figure 6, is a non-contact type card reader using the model RC-S440C manufactured by Sony Corporation J Co., Ltd., for example, with an antenna substrate 3〇2a The magnetic sheet of the antenna module 3〇2 is located at a distance of two sides from the side of the magnetic sheet, and is provided with 5Gx (10) [called a non-scale steel & as measured under the condition of a simulated electronic substrate. 12 201101583
A B FPC (厚度以m) —— ---- 80 80 間隔（β m) 55 50 Total (厚度 # m) ·-—— 288 285 最大可通訊距離（mm) 11 5.5 112.5 ——__ 如上述表1所π ’天線模紐_ A，相較於天線模組B，雖AB FPC (thickness in m) —— ---- 80 80 interval (β m) 55 50 Total (thickness # m) ·-—— 288 285 Maximum communicable distance (mm) 11 5.5 112.5 ——__ As above 1 π 'antenna module _ A, compared to antenna module B, although
天線基板與模組之整體厚度相 圈-磁性片材間之間隔，其結果 訊0 同’但能盡量擴大天線線 ’能遠至3[mm]程度進行通 其次’參照圖7，說明血讀耷 3興°賈冩器間之感應耦合時之通訊 特性。此處，橫軸表示通訊用之 够每之頻率，縱軸表示對 應於頻率之最切通訊㈣H讀寫ϋ發射之磁場之 頻率’雖如上4為13.56ΜΗζ，在利用感應轉合進行通訊時， 係使用⑤於13.56MHz之磁場之頻率來進行通訊。 、曰由圖7可知’天線模組Α，相較於天線模組Β，在作 〇 測量對象之全部頻;^1# 貝咿具特性上同、且通訊感度佳。 又’於下述表2,係表示天線模組Α、β之電 電阻值R、Q值。 [表2 L[/z Η] R[Q ] A 1.668 〜· — 3.137 B 1.669 3.70^The thickness of the antenna substrate and the module is the same as the thickness of the module - the interval between the magnetic sheets, the result is the same as 'but can maximize the antenna line' can be as far as 3 [mm] to pass the next 'refer to Figure 7, showing blood reading The communication characteristics of the inductive coupling between the three 兴 兴 冩 冩 。. Here, the horizontal axis indicates the frequency used for communication, and the vertical axis indicates the most accurate communication corresponding to the frequency. (4) The frequency of the magnetic field emitted by the H-reading/receiving ' is '13.56ΜΗζ as shown in the above 4, when communicating by induction switching, The frequency is communicated using a frequency of 5 at a magnetic field of 13.56 MHz. It can be seen from Fig. 7 that the antenna module is the same as the antenna module, and the frequency of the measurement object is the same as that of the antenna module. Further, in Table 2 below, the electric resistance values R and Q of the antenna module Α and β are shown. [Table 2 L[/z Η] R[Q ] A 1.668 ～· — 3.137 B 1.669 3.70^
' --—^--3 8 8 由上述表2可知，天線模組A，相較於天線模組B 藉 13 201101583 由增加導電性金屬層之厚度，可使天線線圈之電阻值降 低，結果，在天線模組之整體厚度相同之條件下，如q值 所示可提高通訊性能。 由以上之結果可知，本實施形態之天線模組，在配置 成天線線圈-磁性片材間之間隔在50[#叫至55[#叫之範 圍内分離之條件下，可實現模組整體之薄型化、及良好之 通訊特性。如此，可實現模組整體之薄型化、及良好之通 訊特性之理由在於，作為分離天線線圈_磁性片材之構 件’可使用天線線圈表面構裝之絕緣部之故。 【圖式簡單說明】 圖1係表示組裝有適用本發明之天線模組之無線通訊 系統之構成圖。 圖2係用以說明適用本發明之天線模組之構成之截面 圖。 圖3係用以說明比較例之天線模組之構成之截面圖。 圖4係用以說明對應於天線線圈—磁性片材間之間隔 之通訊特性變化。 圖5(A)、（B)係表示天線模組之具體尺寸。 圖6係用以說明測定通訊距離之測定條件。 圖7係用以說明在讀寫器與天線模組之間進行感應耦 合時之通訊特性。 圖8(A)、（B)係用以說明對應於天線圖案與磁性片材間 之間隔之通訊特性變化。 【主要元件代表符號】 14 201101583 1 ' 200 > 302 2 2a 2b 3 4 11 ' 101 > 302a 1 la、102 lib、 103 > 213a 12 、 104 、 230 、 402 13 、 220 100 111 ' 212 112、211 112a 113 210 213 301 303 401 403 天線模組 讀寫器 天線 控制基板 筐體 通訊處理部 天線基板 天線線圈 端子部 磁性片材 黏著層 無線通訊糸統 導電性金屬層 絕緣層 面 耐腐蝕性金屬層 單一存取配線板 電阻層 非接觸型1C卡讀寫器 不銹鋼板 天線圖案 ADH層 15' ---^--3 8 8 As can be seen from Table 2 above, the antenna module A can reduce the resistance value of the antenna coil by increasing the thickness of the conductive metal layer compared with the antenna module B by 13 201101583. Under the condition that the overall thickness of the antenna module is the same, as shown by the q value, the communication performance can be improved. As can be seen from the above results, in the antenna module of the present embodiment, the entire module can be realized under the condition that the interval between the antenna coil and the magnetic sheet is 50 [# to 55 [#] Thin, and good communication characteristics. Thus, the reason why the overall thickness of the module and the good communication characteristics can be achieved is that the insulating portion of the antenna coil surface can be used as the member for separating the antenna coil_magnetic sheet. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of a wireless communication system in which an antenna module to which the present invention is applied is assembled. Fig. 2 is a cross-sectional view for explaining the constitution of an antenna module to which the present invention is applied. Fig. 3 is a cross-sectional view showing the configuration of an antenna module of a comparative example. Fig. 4 is a view for explaining changes in communication characteristics corresponding to the interval between the antenna coil and the magnetic sheet. 5(A) and (B) show the specific dimensions of the antenna module. Fig. 6 is a view for explaining measurement conditions for measuring a communication distance. Figure 7 is a diagram for explaining the communication characteristics when inductively coupled between the reader and the antenna module. 8(A) and (B) are diagrams for explaining changes in communication characteristics corresponding to the interval between the antenna pattern and the magnetic sheet. [Main element representative symbol] 14 201101583 1 '200 > 302 2 2a 2b 3 4 11 ' 101 > 302a 1 la, 102 lib, 103 > 213a 12 , 104 , 230 , 402 13 , 220 100 111 ' 212 112 211 112a 113 210 213 301 303 401 403 Antenna module reader antenna control board housing communication processing unit antenna substrate antenna coil terminal magnetic sheet adhesive layer wireless communication system conductive metal layer insulation layer corrosion resistant metal layer Single access wiring board resistance layer non-contact type 1C card reader stainless steel plate antenna pattern ADH layer 15