200905973 九、發明說明： 【發明所屬之技術領域】 發明領域 本發明係有關於一種無線射頻識別標籤及其製造方 5 法。 C先前技術】 發明背景 RFID(Radio Frequency ldentification)作為無線通訊系 統之一種而為人所熟知。RFID系統通常包含無線射頻識別 1〇標籤（亦稱為RHD標籤)與讀寫(RW)裝置，而由胃裝置藉無 線通訊對無線射頻識別標籤進行資訊之讀出寫入。 無線射頻識別標籤已為人知者則有一型係藉無線射頻 識別標籤之内部電源而動作者(稱為主動式標籤），以及另一 型以來自RW裝置之接收電波為驅動電力而動作者(稱為被 15 動式標籤）。 使用被動式標籤之RFID系統之無線射頻識別標籤係 以來自RW裝置之無線訊號為驅動電力，而使内部之…及 LSI等積體電路動作，以進行與接收無線訊號(控制訊號)對 應之各種處理。由無線射頻識別標籤對尺％裝置進行之發送 20則利用前述接收無線訊號之反射波而進行。即，對該反射 波搭載標籤ID及前述各種處理之結果等資訊而進行對Rw 裝置之發送。 另，RFID系統雖利用各種頻帶，但最近uhf帶 (860MHz〜960 MHz)則頗受矚目。UHF帶與既有之1356 5 200905973 MHz帶及2.45GHz帶相較之下，可進行長距離通訊。日本國 内則分配有952MHz〜954 MHz帶。 無線射頻識別標籤所使用之天線之相關習知技術則有 以下之專利文獻1〜3及非專利文獻1所揭露之技術。 5 專利文獻1係以提供已提昇天線能力之環形天線為目 的’而揭露有線形或帶狀之導電性構件形成環形，同時環 形天線本體具有一對饋電點，此外並具備可滿足預定條件 之用於提昇天線能力之導電構件（寄生元件（Parasitic Element))。 ί〇 專利文獻2則以提供構成可於複數頻帶内進行通訊之 無線射頻識別標籤為目的，而揭露有一種無線射頻識別標 籤，由以下二者所構成，即：第丨導體部，具有約1/2波長 長度而大致平行之對邊而呈環形，並於前述環形之一邊之 中央部接收饋電；及，第2導體部，呈線形，配置於前述第 15 1導體部之近旁。 專利文獻3則以提供可改善窄頻帶特性並可提高增益 之附有寄生元件之環狀天線為目的，而揭露有包含以下二 者2天線，即··至少丨個基本環狀天綠元件；及，寄生元件， 將前述基本環狀天線元件夾置其中，而由朝前述基本環狀 20天線凡件之電場方向配置之第巧體及第2導體所構成； 而至則述第1導體與第2導體之外側兩端部為止之長度為 La且則述至少i個基本環狀天線元件之使用頻率&之自由 空間波長為又〇時，可滿足03)<又〇紅_·55χλ〇。 非專利文獻1則揭露有一種無線射頻識別標鐵天線，包 6 200905973 含有：線形（帶狀)之放射元件(radiating body);及，環形之 饋電元件(feed loop)，設於距離前述放射元件之寬方向約距 離d之位置上，可與前述放射元件進行感應耦合。 專利文獻1 :特開2000-77928號公報 5 專利文獻2 :特開2004-295297號公報 專利文獻3 :特開2006-33298號公報 非專利文獻 1 : H.-W· Son and C.-S.Pyo, “Design of RFID tag antennas using an inductively coupled feed”， Electronics Letters, Vol.41, No.18, 1st September 2005 10 明内 發明概要 發明所欲解決之問題 無線射頻識別標籤之天線（以下亦稱為標籤天線)與^： 及LSI等積體電路之匹配（匹配損失)特性係決定無線射頻識 15 別標籤之性能（通訊距離）之重要因素。 無線射頻識別標籤所使用之前述積體電路之阻抗(Z=R + jX)係諸如實數部（電阻成分R)=數十歐姆（Ω)、虛數部（電 抗成分jX)= — j百歐姆程度，故標籤天線將與該阻抗匹配（匹 配），亦即，須使標籤天線之阻抗與積體電路之阻抗形成複 20 素共役之關係。 又，無線射頻識別標籤容易受其貼附對象（金屬、塑 膠、紙類等）及鄰近物之影響而改變匹配狀態（亦即通訊距離 容易變動’視情況亦可能無法通訊）。 由於以上原因，無線射頻識別標籤之易於匹配調整之 7 200905973 構造之開發備受期待。 然而，專利文獻1〜3所揭露之技術皆為對環形之天線元 件（以下亦稱為天線圖案乃至環形天線)之饋電部直接連接 積體電路之構造（即’天線圖案與饋電部已—體化之構造）， 而極難以匹配(調整)天線圖案與晶片電路之阻抗。尤其，獨 控制(調整)阻k (z)之電阻成分⑻與f抗成分(X)之作業 (即，與R及/或X相異之所有積體電路之阻抗進行匹配之可 能)極為困難。 ^ ’專敎獻1及3巾設於天線®案近旁之寄生元件係 10以提昇天線增益及積定散射截面之頻率特性為目的而設 置’而非以調整阻抗為目的。另，專利文獻2中設於天線圖 案近旁之料it件（帛2導體）即便可餘峨喊，亦非可 獨立調整”域分⑻與冑抗齡(X)者(並未就調 整功能加 以揭露或默示）。 15 相對於此，非專利文獻1中則揭露有可獨立改變電阻成 刀（R)與電抗成分(X)之無線射頻識別標籤。#，依據非專利 文獻1之式(5a)，可視線形之放射元件與環形之饋電元件間 離d(相互電感係數μ)不同而改變電阻成分(R)，且依據 該文件中之式(5b)，則可視環形之饋電元件之長度(Lloop) 20而改變電抗成分(X)。 然而，刚述非專利文獻1之技術必須至少改變前述距離 、文變電阻成分R，亦即必須改變放射元件與環形馈電元 件tl己置位置，而將因積體電路之阻抗而增大無線射頻識 別標籤之大小，而難以使無線射頻識別標籤小型化。 8 200905973 又，諸如第16圖之（1)及(2)所示，無線射頻識別標藏可 設有用以保護積體電路3 〇 〇或補強無線射頻識別標籤而覆 蓋前述積體電路之保護(補強）構件4〇〇，若天線圖案丨〇〇與可 連接積體電路300之饋電部一體化，則將產生該保護構件 5 400之緣部（端部）橫切天線圖案1〇〇之部分（交錯部分），且彎 折負荷容易集中於該部分，故該部分容易發生天線圖案1〇〇 斷線。 本發明係有鐘於上述問題而設計者，其目的之一在提 供-種可獨立且簡易地調整(控制）阻抗之電阻成分與電抗 10成分而易於小型化之無線射頻識別標籤。 又，其他目的之—則在防止覆蓋積體電路部分(饋電部） 之保護構件乃至補強構件所導致天線圖案之斷線。 另’不限於前述目的，後述之實施發明之較佳實施形 也所示之各構U所導出之作用效果，即習知技術無法得到 15之作用效果’亦可視為本發明之其它目的之一。 解決問題之方法 為達成㉛目的，本發明係使用以下所示之無線射頻 識別標籤。 ()P本發月之無線射頻識別標藏包含有：天線導體； 20可與前述天線導體進行電磁感應輕合之第i饋電導體；及， 與前述第1饋^導體電性連接之環形之第2饋電導體。 (2)其中’㈣第1饋電導體亦可具錢極天線形狀或單 極天線形狀。 〇進而W述天線導體、第1饋電導體及第2饋電導體 9 200905973 亦可分別設於介電體基板之一面上。 (4)又，前述天線導體亦可設於介電體基板之一面上， 而前述第1及第2饋電導體亦可分別設於前述介電體基板之 另一面上。 5 (5)進而，前述無線射頻識別標籤亦可設置避開前述天 線導體而覆蓋前述第1及第2饋電導體之補強構件。 (6)又，前述第1饋電導體之與前述天線導體電磁感應耦 合之部分之電氣長度(Electrical Length)宜設定為前述天線 導體之收發訊號之波長之一半以下。 10 (7)進而，前述第2饋電導體之電氣長度宜小於前述天線 導體之收發訊號之波長。 (8) 又，本發明之無線射頻識別標籤之製造方法係形成 天線導體，再形成可與前述天線導體進行電磁感應耦合之 第1饋電導體，最後形成與前述第1饋電導體電性連接之環 15 形之第2饋電導體。 (9) 在此，亦可藉改變前述第1饋電導體之與前述天線導 體電磁感應耦合之部分之電氣長度，而控制前述天線導體 與電性連接於前述第1及第2饋電導體之積體電路之阻抗匹 配。 20 (10)又，亦可藉改變前述第2饋電導體之電氣長度，而 控制前述天線導體與電性連接於前述第1及第2饋電導體之 積體電路之阻抗匹配。 發明之效果 依據前述之本發明，藉分別改變第1及第2饋電導體之 10 200905973 大〗^無須變更與天線導體之配置關係(距離），即可個別 ^制（_整）電阻成分與電抗成分。因此，可實現阻抗匹配較 ,、 易於小型化之無線射頻識別標籤。 5 又，由於天線導體與第1及第2饋電導體係物理上呈分 狀態，故易於進行個別設計製造，阻抗匹配之調整所需 之則述大小變更亦可輕易進行。 進而，天線導體與第丨及第2饋電導體係物理上呈分離 狀態，故易於避開天線導體而設置保護乃至補強構件，藉 *亥構件亦可輕易防止天線導體發生斷線。 10圖式簡單說明 第1圖係顯示本發明一實施例之無線射頻識別標藏之 構造（導體圖案）之平面圖。 第2圖係顯示第1圖所示之無線射頻識別標籤之變形例 者。 15 第3圖係用以說明第2圖所示之無線射頻識別標籤之模 擬條件者。 第4圖係用以說明第3圖所示之模擬條件下之天線阻抗 與積體電路(標籤LSI)阻抗之關係之史密斯圖。 第5圖係顯示第3圖所示之模擬條件下之無線射頻識別 20標籤之頻率對增益特性之圖表。 第6圖係顯示第3圖所示之模擬條件下之無線射頻識別 標籤之頻率對訊訊距離特性之圖表。 第7圖係用以說明本實施例之無線射頻識別標籤之第i 阻抗匹配方法者。 11 200905973 第8圖係用以說明本實施例之無線射頻識別標籤之第2 阻抗匹配方法者。 第9圖係用以說明本實施例之無線射頻識別標籤之第3 阻抗匹配方法者。 5 第10圖係用以說明本實施例之無線射頻識別標籤之第 4阻抗匹配方法者。 第11圖係用以說明本實施例之無線射頻識別標籤之第 5阻抗匹配方法者。 第12圖係用以說明本實施例之無線射頻識別標籤之第 10 6阻抗匹配方法者。 第13圖係用以說明本實施例之無線射頻識別標籤之製 造方法者。 第14圖係顯示第1圖及第2圖所示之無線射頻識別標籤 之變形例之平面圖。 15 第15圖係顯示第1圖及第2圖所示之無線射頻識別標籤 之變形例之平面圖。 第16圖係用以說明習知技術之問題者。 【實施方式3 較佳實施例之詳細說明 20 以下，參照附圖說明本發明之實施例。然而，本發明 並不限於以下所示之實施例，而可於不逸脫本發明旨趣之 範圍内進行各種變形實施，則自不待言。 [1] 一實施例之說明 第1圖係顯示本發明一實施例之無線射頻識別標籤之 12 200905973 構造（導體圖幸 平面圖，該第1圖所示之無線射頻識別標 折狀之=爯^「檩籤天線」）包含有：兩端形成複數回折彎 線圖案1 帶狀）之天線圖案（天線導體）1 ;設於為該天 包圍之領⑴述考折形成部分與該部A以外之直線部分所 盘前if ^ ’心調整阻抗之饋電圖案（匹配部)2 ;及，可 ，、之饋電部電性連接之1C及LSI等積體電路 1下亦標記為「择、 式顯示，前述標戴LSI3」）。另，諸如第3圖之(2)之模 10 15 20 絲+4+ /引V之圖案1、2係設於無線射頻識別標籤之構成 材枓之介電體(層)内。 饋電圖幸2 所垃队 以下亦稱為四配圖案）係作為以天線圖案1 案^共终/ /’、、、驅動電力而朝積體電路3饋電，或朝天線圖 作田A自積體電路3内部之驅動電源之電力之饋電部而 用’而包含右ώ 之2個線， ，、則述天線圖案1高頻結合（電磁感應耦合） 及，分另，形（或帶狀）之圖案（線形圖案、第1饋電導體)21 ; 円宏r /、別述線形圖案21連通而電性連接之環（四角）狀之 〜％形圖案、第2饋電導體)22。 /線形圖案21係分別自環形圖案22之前述饋電部 前、;H)近旁開始分歧而互朝相反方向與天線圖案丄之 /直線部分並行而延伸。前料形圖案21若著重於其形 ]本例中，其具有相對於積體電路3呈左右對稱設置之 、胃雙極天線相同之形狀。因此，以下，線形圖案21亦 夺‘汜為雙極部21。惟，前述線形圖案21亦可僅設一條 而為與單極天線相同之形狀。 然而，匹配圖案2(雙極部21及環形圖案22)之大小等之 13 200905973 設定宜整體上對天線圖案1之電波收發幾乎不起協助作 用。舉例δ之，前述環形圖案22之全長設定為甚小於應由 天線圖案1所收發之電波波長，可與天線圖案1進行前述電 磁感應耦合之雙極部21之長度則宜設定為應為天線圖案1 5所收發之電波波長之一半（半波長）以下。 因此，匹配圖案2與天線元件(放射元件）及為促成增益 或調整匹配而配置於天線元件近旁之元件（寄生元件）相 較’其目的、功能皆不相同（匹配圖案2係「饋電」圖案， 此點亦不相同）。另’雙極部21之長度設定為半波長以下， 10則一如後述’目的亦在使流動於各雙極部21之電流之方向 相同以使對天線圖案1之饋電（電磁感應耦合;)更容易。 具有上述構造之無線射頻識別標籤一旦改變前述匹配 圖案2之雙極部21之長度（電氣長度），則主要可改變標籤天 線之阻抗（天線阻抗)之電阻成分(R)，換言之，可改變阻抗ζ 15之倒數之導納（admittance)(Y=G+jB)之實數部（電導成分 G)’且一旦改變環形圖案22之環長（電氣長度），則主要可改 變天線阻抗之電抗成分(又），換言之，可改變導納γ之虛數 部（電納成分Β)。另，其細節則留待後述。 又，天線圖案1與匹配圖案2係物理上呈分離（獨立）狀 20態，故易於獨立調整(控制）饋電圖案2與天線圖案丨之大小， 舉例言之，以匹配圖案2為共通者而僅更換天線圖案i，或 以天線圖案1為共通者而僅更換匹配圖案2，則無須焊接等 步驟，即可輕易改變標籤天線之大小。因此，進行無線射 頻識別標籤之再利用時等，天線圖案丨或匹配圖案2之完全 14 200905973 利用將較容易，而甚為有助於節約資源。 另，第1圖（第2圖之⑴亦同）所示之無線射頻識別標籤 之導體圖案亦可諸如第2圖之(2)所示，將天線圖案1、匹配 圖案2之環形圖案22及雙極部21之至少一部分彎折形成曲 5 柄狀。 如此，天線圖案1與匹配圖案2(主要為雙極部21)之電磁 感應耦合部分之電氣長度可增長，故相同外形大小、共振 頻率卻可獲得較大之電導性（參照虛線框^因此，亦可對應 並聯電阻成分較小之標籤天線。 10 另’天線圖案1及匹配圖案2(雙極部21及環形圖案22) 菖然不限於第1圖所示之形狀。若可配合所需電導性而確保 月1J述電磁感應耦合部分之所需電氣長度，則可適當變更圖 案形狀。 以第2圖之(2)所示之構造為前提之模擬結果顯示於第 15 4〜6圖。然而’各圖案之大小一如第3圖之（1)所示，圖案寬 度皆為1mm，圖案導電率為cr2xl06S/m，圖案厚度為丨 m’又，如第3圖之(2)所示，其構成由厚度〇.75mm之介電體 (相對電容率=3.0，介電損失0.01)夾住圖案兩面。又，使用 頻率係800MHz〜1，1〇〇 MHz之頻帶。另，為求簡化，保護(補 2〇強）構件並未模型化。補強材與介電體之電氣特性若幾乎相 同’則對通訊特性造成之影響較少。 「積體電路3之阻抗與標籤天線之阻抗（以下亦簡稱為 「天線阻抗」）若成複素共役之關係，則積體電路3與標籤 天線之阻抗匹配呈已完成之狀態，故諸如第4圖所示，在史 15 200905973 密斯圖上，LSI3之阻抗存在於虛線框所圍之範圍内時，若 可相對於該把圍而使天線阻抗在屬於複素共役之關係之範 圍内改變，則至少可與該範圍内之所有阻抗之標籤1^13完 成匹配。 5 其次，如第5圖所示，無線射頻識別標籤之增益在天線 圖案1之長度（電氣長度)為略半波長時為最大。結果，如第6 圖所示’作為標籤天線可在實用上獲得充分之通訊距離(讀 取範圍）。另，欲於更高頻領域内使用時（諸如日本之 952〜954MHz)，將標籤天線長（電氣長度）縮短即可，反之， 10若欲於較低頻帶内使用（諸如歐洲之869MHz)，將標籤天線 長（電氣長度)延長即可。 在此，第6圖所示之前述通訊距離(r)可藉以下之式（1) 及式(2)計算其值。 [數1]200905973 IX. INSTRUCTIONS: TECHNICAL FIELD OF THE INVENTION The present invention relates to a radio frequency identification tag and a method of its manufacture. C Prior Art Background of the Invention RFID (Radio Frequency ldentification) is well known as one of wireless communication systems. RFID systems typically include radio frequency identification (ID) tags (also known as RHD tags) and read and write (RW) devices, while the stomach device uses wireless communication to read and write information to the radio frequency identification tag. Radio frequency identification tags are known to have a type that uses the internal power supply of the RFID tag to act as an author (called an active tag), and another type that uses the received wave from the RW device as the driving power to drive the author (called For being labeled by 15). A radio frequency identification tag of an RFID system using a passive tag uses a wireless signal from a RW device as a driving power to operate an integrated circuit such as an internal device and an LSI to perform various processes corresponding to receiving a wireless signal (control signal). . The transmission 20 by the radio frequency identification tag to the device of the size 100 is performed by using the reflected wave of the received wireless signal. In other words, the RW device is transmitted by carrying information such as the tag ID and the results of the various processes on the reflected wave. In addition, although the RFID system utilizes various frequency bands, the recent uhf band (860 MHz to 960 MHz) has attracted attention. The UHF band provides long-distance communication compared to the existing 1356 5 200905973 MHz band and the 2.45 GHz band. In Japan, the 952MHz~954 MHz band is allocated. The related art of the antenna used in the radio frequency identification tag is as disclosed in the following Patent Documents 1 to 3 and Non-Patent Document 1. 5 Patent Document 1 discloses a loop-shaped or strip-shaped conductive member for forming a loop for the purpose of providing a loop antenna having an improved antenna capability, and the loop antenna body has a pair of feed points, and is provided with a predetermined condition. A conductive member (parasitic element) for improving the antenna capability. 〇 Patent Document 2 aims to provide a radio frequency identification tag that can communicate in a plurality of frequency bands, and discloses a radio frequency identification tag, which is composed of: a second conductor portion having about 1 /2 wavelengths are substantially parallel to the opposite sides and are annular, and receive power at a central portion of one of the ring sides; and the second conductor portion has a linear shape and is disposed in the vicinity of the fifteenth conductor portion. Patent Document 3 aims to provide a loop antenna with parasitic elements capable of improving narrow-band characteristics and improving gain, and discloses two antennas including two antennas, that is, at least one basic loop-shaped green component; And the parasitic element is formed by sandwiching the basic loop antenna element and forming the first and second conductors disposed in the direction of the electric field of the substantially annular 20 antenna; and the first conductor is When the length of both ends of the second conductor is La, and the free-space wavelength of the use frequency of at least one of the basic loop antenna elements is 〇, it can satisfy 03) < 〇红_·55χλ Hey. Non-Patent Document 1 discloses a radio frequency identification target antenna, and package 6 200905973 includes: a linear (band-shaped) radiating body; and a ring-shaped feed loop disposed at a distance from the aforementioned radiation The width direction of the element is about the distance d, and can be inductively coupled to the aforementioned radiating element. Patent Document 1: JP-A-2000-77928, JP-A-2005-295297, JP-A-2006-295297, JP-A-2006-33298, JP-A No. 2006-33298, Non-Patent Document 1: H.-W· Son and C.-S .Pyo, "Design of RFID tag antennas using an inductively coupled feed", Electronics Letters, Vol.41, No.18, 1st September 2005 10 SUMMARY OF THE INVENTION The problem to be solved by the invention is the antenna of the radio frequency identification tag (hereinafter also The matching (matching loss) characteristic of the integrated circuit such as the tag antenna) and the LSI is an important factor in determining the performance (communication distance) of the radio frequency identification tag. The impedance (Z=R + jX) of the above-mentioned integrated circuit used in the radio frequency identification tag is such as a real part (resistance component R) = tens of ohms (Ω), an imaginary part (reactance component jX) = - j hundred ohms Therefore, the tag antenna will match (match) the impedance, that is, the impedance of the tag antenna and the impedance of the integrated circuit must be formed in a commensurate relationship. Moreover, the radio frequency identification tag is easily changed by the object to be attached (metal, plastic, paper, etc.) and the adjacent object (i.e., the communication distance is easily changed) and may not be communicated as the case may be. For the above reasons, the development of radio frequency identification tags is easy to match. 7 200905973 The development of the structure is expected. However, the techniques disclosed in Patent Documents 1 to 3 are all configured to directly connect an integrated circuit to a feeding portion of a ring-shaped antenna element (hereinafter also referred to as an antenna pattern or a loop antenna) (ie, 'the antenna pattern and the feeding portion have been - The construction of the body), and it is extremely difficult to match (adjust) the impedance of the antenna pattern to the wafer circuit. In particular, it is extremely difficult to independently control (adjust) the resistance component (8) of the resistance k (z) and the operation of the f-resistance component (X) (that is, the possibility of matching the impedances of all integrated circuits different from R and/or X). . ^ 'Specially dedicated 1 and 3 wipes are provided in the vicinity of the Antenna® case. The parasitic element system 10 is set for the purpose of increasing the antenna gain and the frequency characteristics of the integrated scattering section instead of adjusting the impedance. In addition, in the patent document 2, the material in the vicinity of the antenna pattern (帛2 conductor) can be independently adjusted even if it can be shouted, the domain (8) and the anti-age (X) are not adjusted. In contrast, Non-Patent Document 1 discloses a radio frequency identification tag capable of independently changing a resistance forming blade (R) and a reactance component (X). #, according to the formula of Non-Patent Document 1 ( 5a), the visible line-shaped radiating element and the ring-shaped feeding element are different from d (mutual inductance coefficient μ) to change the resistance component (R), and according to the formula (5b) in the document, the ring-shaped feeding element is visible The length (Lloop) 20 changes the reactance component (X). However, the technique of the non-patent document 1 must change at least the aforementioned distance and the varistor resistance component R, that is, the radiating element and the ring-shaped feed element must be changed. Position, and the size of the radio frequency identification tag is increased by the impedance of the integrated circuit, and it is difficult to miniaturize the radio frequency identification tag. 8 200905973 Also, as shown in (1) and (2) of FIG. 16, wireless The RFID tag can be provided to protect the integrated circuit 3 The protective (reinforcing) member 4 of the integrated circuit is covered or reinforced by a radio frequency identification tag, and the protective member is generated if the antenna pattern 一体化 is integrated with the feeding portion of the connectable integrated circuit 300 The edge portion (end portion) of the 5400 crosses the portion (interlaced portion) of the antenna pattern 1〇〇, and the bending load is easily concentrated in the portion, so that the antenna pattern 1 is easily broken. One of the purposes of the above-mentioned problem is to provide a radio frequency identification tag that can easily and easily adjust (control) the resistance component of the impedance and the reactance 10 component, and is easy to miniaturize. The antenna pattern is prevented from being broken by the protective member or the reinforcing member covering the integrated circuit portion (feeding portion). Further, the present invention is not limited to the above-described objects, and the preferred embodiments of the invention described later are also shown. The effect of the derivation, that is, the effect that the prior art cannot obtain the effect of 15 can also be regarded as one of the other objects of the present invention. The method for solving the problem is to achieve the purpose of 31, and the present invention is used. The radio frequency identification tag shown below. () The radio frequency identification tag of the present month includes: an antenna conductor; 20 an i-th feed conductor that can be optically coupled with the antenna conductor; and, 1 feeding the second feeding conductor of the ring electrically connected to the conductor. (2) The '(4) first feeding conductor may also have a shape of a polar antenna or a monopole antenna. 〇 Further, the antenna conductor and the first feed are described. The electric conductor and the second feed conductor 9 200905973 may be respectively disposed on one surface of the dielectric substrate. (4) Further, the antenna conductor may be disposed on one surface of the dielectric substrate, and the first and second sides are The feed conductors may be respectively disposed on the other surface of the dielectric substrate. 5 (5) Further, the radio frequency identification tag may be provided with a reinforcement that covers the first and second feed conductors while avoiding the antenna conductor. member. (6) Further, the electrical length of the portion of the first feed conductor that is electromagnetically inductively coupled to the antenna conductor is preferably set to be less than one-half of the wavelength of the transmission and reception signal of the antenna conductor. (7) Further, the electrical length of the second feed conductor is preferably smaller than the wavelength of the transmission and reception signals of the antenna conductor. (8) Further, in the method of manufacturing a radio frequency identification tag of the present invention, an antenna conductor is formed, and a first feed conductor electromagnetically coupled to the antenna conductor is formed, and finally formed to be electrically connected to the first feed conductor. The second feed conductor of the ring 15 shape. (9) Here, the antenna conductor may be electrically connected to the first and second feed conductors by changing an electrical length of a portion of the first feed conductor that is electromagnetically inductively coupled to the antenna conductor. The impedance of the integrated circuit is matched. (10) Further, by changing the electrical length of the second feed conductor, the impedance matching between the antenna conductor and the integrated circuit electrically connected to the first and second feed conductors may be controlled. Advantageous Effects of Invention According to the present invention described above, by changing the first and second feed conductors 10 200905973, it is possible to individually control the resistance component and the antenna conductor without changing the arrangement relationship (distance) with the antenna conductor. Reactance component. Therefore, it is possible to realize a radio frequency identification tag which is relatively easy to be impedance-matched and which is easy to miniaturize. 5 Moreover, since the antenna conductor and the first and second feed conductance systems are physically separated, it is easy to perform individual design and manufacture, and the size change required for the impedance matching adjustment can be easily performed. Further, since the antenna conductor is physically separated from the second and second feeding conductor systems, it is easy to provide protection or even a reinforcing member while avoiding the antenna conductor, and the antenna member can be easily prevented from being broken by the wiring member. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing a structure (conductor pattern) of a radio frequency identification tag according to an embodiment of the present invention. Fig. 2 is a view showing a modification of the radio frequency identification tag shown in Fig. 1. 15 Figure 3 is a diagram showing the simulated conditions of the RFID tag shown in Figure 2. Fig. 4 is a Smith chart for explaining the relationship between the antenna impedance under the simulation conditions and the impedance of the integrated circuit (tag LSI) shown in Fig. 3. Figure 5 is a graph showing the frequency versus gain characteristics of the radio frequency identification 20 tag under the simulated conditions shown in Figure 3. Figure 6 is a graph showing the frequency versus signal distance characteristics of a radio frequency identification tag under the simulated conditions shown in Figure 3. Fig. 7 is a diagram for explaining the i-th impedance matching method of the radio frequency identification tag of the embodiment. 11 200905973 Fig. 8 is a diagram for explaining the second impedance matching method of the radio frequency identification tag of the present embodiment. Fig. 9 is a diagram for explaining the third impedance matching method of the radio frequency identification tag of the present embodiment. 5 Fig. 10 is a diagram for explaining the fourth impedance matching method of the radio frequency identification tag of the present embodiment. Figure 11 is a diagram for explaining the fifth impedance matching method of the radio frequency identification tag of the present embodiment. Figure 12 is a diagram for explaining the 106th impedance matching method of the radio frequency identification tag of the present embodiment. Fig. 13 is a view for explaining the method of manufacturing the radio frequency identification tag of the embodiment. Fig. 14 is a plan view showing a modification of the radio frequency identification tag shown in Figs. 1 and 2. 15 Fig. 15 is a plan view showing a modification of the radio frequency identification tag shown in Figs. 1 and 2. Figure 16 is a diagram for explaining the problems of the prior art. [Embodiment 3] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments shown below, and various modifications can be made without departing from the scope of the present invention. [1] Description of an embodiment FIG. 1 shows a structure of a radio frequency identification tag 12 200905973 according to an embodiment of the present invention (a conductor plan diagram, the radio frequency identification mark shown in FIG. 1 = 爯 ^ "檩""""""""""""""""""""""""""""""""""""""""""""""" In the straight line portion, the feed pattern (matching portion) 2 of the heart is adjusted to the impedance of the heart; and the integrated circuit 1C such as the LSI and the integrated circuit 1 are also marked as "selective" Display, the aforementioned standard LSI 3"). Further, the patterns 1 and 2 such as the pattern 10 15 20 + 4 + / V of Fig. 3 (2) are provided in the dielectric (layer) of the constituents of the radio frequency identification tag. In the case of the antenna pattern 1, the following is called the four-pattern, and the power is supplied to the integrated circuit 3 by the antenna pattern 1 or the driving power, or the antenna A is self-productive toward the antenna pattern. The power feeding unit of the driving power source inside the body circuit 3 uses two lines of the right side, and the antenna pattern 1 is combined with high frequency (electromagnetic induction coupling) and, separately, shaped (or banded). a pattern (linear pattern, first feed conductor) 21; 円 macro r /, a ring-shaped pattern 21 in which the linear patterns 21 are connected to each other, and a ring-shaped (four-corner pattern) and a second feed conductor 22 are electrically connected. The /linear pattern 21 extends from the vicinity of the feeding portion of the annular pattern 22, and near the H), and extends in parallel with the linear portion of the antenna pattern 互 in opposite directions. The front material pattern 21 is focused on its shape. In this example, it has the same shape as the stomach dipole antenna which is disposed symmetrically with respect to the integrated circuit 3. Therefore, in the following, the linear pattern 21 also occupies the bipolar portion 21. However, the linear pattern 21 may be provided in only one shape and in the same shape as the monopole antenna. However, the size of the matching pattern 2 (the bipolar portion 21 and the annular pattern 22), etc., 13 200905973 is set to be substantially incapable of assisting the radio wave transmission and reception of the antenna pattern 1 as a whole. For example, the total length of the ring pattern 22 is set to be smaller than the wavelength of the radio wave to be transmitted and received by the antenna pattern 1. The length of the bipolar portion 21 that can be electromagnetically coupled to the antenna pattern 1 should be set to be an antenna pattern. One or more half (half wavelength) of the wavelength of the radio wave transmitted and received by 15. Therefore, the matching pattern 2 is different from the antenna element (radiation element) and the element (parasitic element) disposed near the antenna element for facilitating gain or adjustment matching (the purpose and function are different) (match pattern 2 is "feeding") Pattern, this point is also different). In addition, the length of the bipolar portion 21 is set to be less than a half wavelength, and 10 is the same as that of the current flowing through each of the bipolar portions 21 for the purpose of feeding the antenna pattern 1 (electromagnetic induction coupling; ) is easier. When the radio frequency identification tag having the above configuration changes the length (electrical length) of the bipolar portion 21 of the matching pattern 2, the resistance component (R) of the impedance (antenna impedance) of the tag antenna can be mainly changed, in other words, the impedance can be changed.实 15 admittance (Y=G+jB) real part (conducting component G)' and once the ring length (electrical length) of the ring pattern 22 is changed, the reactance component of the antenna impedance can be mainly changed ( Also), in other words, the imaginary part of the admittance gamma (the susceptance component Β) can be changed. In addition, the details are left to be described later. Moreover, the antenna pattern 1 and the matching pattern 2 are physically separated (independent), and it is easy to independently adjust (control) the size of the feed pattern 2 and the antenna pattern ,. For example, the matching pattern 2 is common. When only the antenna pattern i is replaced, or only the matching pattern 2 is replaced with the antenna pattern 1 being common, the size of the tag antenna can be easily changed without the need for soldering or the like. Therefore, when the radio frequency identification tag is reused, etc., it is easier to use the antenna pattern 丨 or the matching pattern 2, and it is helpful to save resources. In addition, the conductor pattern of the radio frequency identification tag shown in FIG. 1 (the same as (1) of FIG. 2) may also be, as shown in FIG. 2 (2), the antenna pattern 1, the ring pattern 22 of the matching pattern 2, and At least a portion of the bipolar portion 21 is bent to form a curved shape. In this way, the electrical length of the electromagnetic inductive coupling portion of the antenna pattern 1 and the matching pattern 2 (mainly the bipolar portion 21) can be increased, so that the same outer shape and resonance frequency can obtain a large electrical conductivity (refer to the dotted line frame). It can also correspond to a tag antenna with a small parallel resistance component. 10 The other 'antenna pattern 1 and matching pattern 2 (bipolar portion 21 and ring pattern 22) are not limited to the shape shown in Fig. 1. If the required conductance can be matched The pattern shape can be appropriately changed by ensuring the required electrical length of the electromagnetic induction coupling portion of the month. The simulation result based on the structure shown in Fig. 2 (2) is shown in Figures 15 to 6. 'The size of each pattern is as shown in (1) of Figure 3, the pattern width is 1mm, the pattern conductivity is cr2xl06S/m, and the pattern thickness is 丨m', as shown in (2) of Figure 3, The composition is composed of a dielectric body having a thickness of 〇75 mm (relative permittivity = 3.0, dielectric loss of 0.01) sandwiching both sides of the pattern. Further, the frequency band is 800 MHz to 1, 1 〇〇 MHz, and for simplification, The protective (complement 2) component is not modeled. The reinforcing material and the dielectric If the electrical characteristics are almost the same, the influence on the communication characteristics is less. "The impedance of the integrated circuit 3 and the impedance of the tag antenna (hereinafter also referred to as "antenna impedance") are integrated circuits. The impedance matching with the tag antenna is in a completed state. Therefore, as shown in FIG. 4, on the history map of 2009 15 200905973, when the impedance of the LSI 3 exists within the range enclosed by the broken line frame, if it is possible to be relative to the circumference If the impedance of the antenna is changed within the range of the relationship of the regenerative commensurate, at least it can be matched with the label 1^13 of all the impedances in the range. 5 Next, as shown in Fig. 5, the gain of the radio frequency identification tag is at the antenna. The length (electrical length) of the pattern 1 is maximum at a half wavelength. As a result, as shown in Fig. 6, 'as a tag antenna, a sufficient communication distance (read range) can be obtained practically. When used in the field (such as 952~954MHz in Japan), the tag antenna length (electrical length) can be shortened. Otherwise, if it is to be used in a lower frequency band (such as 869MHz in Europe), the tag will be used. The line length (electrical length) can be extended. Here, the aforementioned communication distance (r) shown in Fig. 6 can be calculated by the following equations (1) and (2). [Number 1]
·. (1) 15 lZc+Ze|2 ··· λ :波長 pt :讀寫(RW)之功率 Gt '·天線增益 q:匹配係數 20 Pth:«電路3之最小動作功率 標籤天線增益 (2) 16 200905973· (1) 15 lZc+Ze|2 ··· λ : wavelength pt : power of reading and writing (RW) Gt '·antenna gain q: matching coefficient 20 Pth: «minimum action power tag antenna gain of circuit 3 (2 ) 16 200905973
Rc，Xc:積體電路3之電阻（電抗Zc=Re+jXe> Ra，Xa :標籤天線之電阻（電抗Za=Ra+jXa) 模擬之計算條件一如以下表丨所示。 [表1]計算條件 晶片電路 最小動作功率 (Pth) -9.00 dBm Rep 800.00 Ω ----~~~~~_ Γ Cep Γ 1.85 pF RW 功率(pt) 27.00 dBm L---- 增益(Gt) 9.00 dBi 另，前述表1中分別顯示Rcp相當於積體電路3之阻抗& 之倒數之導納(Ye= 1 /Z(；=G+jB)之電導成分G，則相當於積 體電路3之導納（Ye)之電納成分B。Rc, Xc: Resistor of integrated circuit 3 (reactance Zc = Re + jXe > Ra, Xa: resistance of tag antenna (reactance Za = Ra + jXa) The calculation conditions of the simulation are as shown in the following table [Table 1] Calculate the minimum operating power (Pth) of the chip circuit -9.00 dBm Rep 800.00 Ω ----~~~~~_ Γ Cep Γ 1.85 pF RW Power (pt) 27.00 dBm L---- Gain (Gt) 9.00 dBi In Table 1, respectively, it is shown that Rcp corresponds to the admittance of the reciprocal of the impedance & and the conductance component G of Ye= 1 /Z(;=G+jB), which corresponds to the guide of the integrated circuit 3. Neon (Ye) gamma component B.
10 J. A /、-人，以下則就前述無線射頻識別標籤之阻抗調整方 法加以說明。 (匹配調整1) 如第7圖之(1)之a、b、c所示，匹配圖案2之環形圖案22 15之大小（標籤天線之寬度方向（紙面上下方向）之長度（電氣 長度))-旦改變’則史密斯圖上之阻抗軌跡將如第7圖之(2) 所示般改變。 亦即，環形圖案22之前述寬度方向之長度若縮短，則 土史费斯®上’阻抗軌跡將朝逆時針方向旋轉(變化）。此則 扣電納成分B之絕對值增大。因此，環形圖案η之前述寬 度方向之長度-旦改變，即可調整標籤天線之輸入電納。 另史後斯圖上之前述阻抗執跡之旋轉逆時針方向變 17 200905973 化之同時，該阻抗軌跡所劃圓形亦將縮小，而此則意指電 導成分G將減小。因此，環形圖案22之前述寬度方向之長度 一旦縮短，即可一併調整標籤天線之輸入電導性。然而， 可在電導成分與電納成分中以變化促進度較高者為主而進 5 行匹配調整。 (匹配調整2) 又，如第8圖之（1)之a、b、c所示，匹配圖案2之雙極部 (兩線形圖案)21之長度（即，主要為與天線圖案1電磁感應耦 合之部分之長度（電氣長度))一旦改變，則在史密斯圖上， 10 阻抗軌跡將如第8圖之(2)所示般改變。 亦即，各雙極部21之長度（電氣長度)若縮短，則在史密 斯圖上，阻抗軌跡所劃圓將縮小。此即意指雙極部21與天 線圖案1之電磁感應耦合之結合度減弱，電導成分G亦減小。 因此，藉改變雙極部21之長度（電氣長度），主要可調整 15 標籤天線之輸入電導性。 (匹配調整3) 進而，如第9圖之（1)之a、b、c所示，匹配圖案2之雙極 部21之單方長度（電氣長度)若改變，則在史密斯圖上，阻抗 軌跡亦將如第9圖之(2)所示般改變。 20 亦即，若縮短雙極部21之單方長度（電氣長度），則雙極 部21與天線圖案1之電磁感應耦合之結合度將減弱，於史密 斯圖上，前述阻抗執跡所劃圓亦將縮小，故電導成分G將減 小0 因此，即便改變雙極部21之單方長度（電氣長度），主要 18 200905973 亦可調整標籤天線之輪人電導性。 (匹配調整4) 第1〇圖之⑴之a、b、c所示，匹配圖案2之環形 圖案22之f小(標籤天線之長向（紙面左右長度）之長度（電 氣長度))右改變，則在史密斯圖上，阻抗執跡將如第1〇圖之 (2)所不般改變。 亦即，右缩短環形圖案22之前述長向之長度（電氣長 度），則在史密斯圖上，阻抗執跡將朝逆時針方向旋轉（變 10 15 20 化）。此_電纟域糾之絕對值增大。因此 形圖案22之前述長向夕且洛/命〆ε 文衣 之輸入電納。 錢（電度），料輕標籤天線 帛目之(2)巾’在史㈣51上之前述阻抗執跡之 逆時針方向變化之同時，該阻抗執跡所劃圓亦縮小（即，電 導成分減小）。因此，—旦縮短環形圖案22之前述長向之長 度，則可一併調整標籤天線之輸入電導性。然而，可在電 導成分與電納成分中以變化促進度較高者為主 調整。 配 (匹配調整5) 如第U圖所示，天線圖案卜而藉環氧樹脂等介電 體4覆蓋匹配圖案2(雙極抑及環形圖案22)與積體電⑽ 進行保護細）時，藉改變該介電體(以下亦稱為恤保護 材」）4之介電率，即可改變雙極部21及環形圖案22之電氣 長度，故可實施匹配調整。 舉例言之，介電體4之介電率1提高，則環形圖案Μ 19 200905973 看起來增長而電納之絕對值減小，由於雙極部21看起來增 長，故電導性增大。另，第11圖中，標號5代表覆蓋標籤天 線整體之樹脂材。 計算例顯示於第12圖。第12圖中，如（1)所示，已顯示 5 介電體4之相對電容率= 1.5，介電損失=0.0時(範例a)，以及 介電體4之相對電容率=1〇,〇，介電損失=〇.〇時(範例…之之種 範例之模擬結果。（2)已顯示史密斯圖上之阻抗變化(使用頻 帶=800MHz〜1,100MHz)。然而，範例a、b中，覆蓋標籤天 線整體之樹脂材5之相對電容率皆為3.0 ’介電損失tan占皆 1〇 為0·(Π。 由第12圖之(2)可知，一旦提高介電體4之介電率，則在 史密斯圖上阻抗執跡所劃圓將擴大。且，其將略朝時針方 向旋轉（變化）。此則意指雙極部21及環形圖案22皆看起來較 長’故電納成分之絕對值則減小。又，由於雙極部21看起 15 來較長，故饋電圖案2與天線圖案1之電磁感應耦合之結合 度將增強，結果，電導成分則增大。 另，前述LSI保護材4之介電率亦可局部改變。舉例言 之，亦可就覆蓋雙極部21之部分與覆蓋環形圖案22之部分 獨立設定介電率。如此，即可個別改變雙極部21之電氣長 20度與環形圖案22之電氣長度，故可個別調整標籤天線之輸 入電導性與輸入電納。 如上所述，依據本實施例之無線射頻識別標籤，藉個 別改變饋電圖案2之雙極部21與環形圖案2 2之大小，則無須 變更與天線圖案1之配置關係（距離等），即可個別控制（調整) 20 200905973 電阻成分與電抗成分(電導成分與電納成分）。因此 可輕易進行阻抗匹配並易於小型化之無線射賴別標藏。 又，天線圖案1與饋電圖案2(雙極部21及環形圖案功 係物理上呈分離狀態，故個別設計及製造較容易，且目的 5在調整阻抗匹配之前述大小變更之進行亦更容易。 進而，由於天線圖案}與饋電圖案2係物理上呈分離消 立)狀態，故如第11圖所示，避開天線圖案】而藉介電體4覆 蓋匹配圖案2(雙極部η及環形圖案22)與積體電路3以進行 保護(補強）將較容易。因此，LSI保護材4將不致如習知技術 Π)般，產生橫切天線圖案i之部分，而可防止該部分發生斷線。 (製造方法） 其次，就上述之標籤天線之製造方法加以說明。 其中一種方法，舉例言之，係於聚對苯二甲酸乙二酯 (PET)等樹脂薄片或印刷基板等介電體(基板)之單面上分別 15形成天線圖案1與饋電圖案2之方法。各圖案1、2之形成噸 序則不拘何者為先，同時亦可。然後，視需要而以保護(補 強)構件覆蓋饋電圖案2。又，視需要而以所需之樹脂材覆 蓋標籤天線整體。 又，其它方法則有於樹脂薄片、印刷基板等介電體(基 2〇板)之各面上獨立形成天線圖案1與饋電圖案2之方法。即， 於介電體基板之單面上形成天線圖案】，並於另—面上 饋電圖案2。 乂 諸如第13圖所示，（1)於第1樹脂薄片l〇a表面上形成天 4·圖案1，同時，（2)於第2樹脂薄片wb表面上形成饋電圖案 21 200905973 2 ’（3)將該等樹脂薄片l〇a、10b其中之一貼附於介電體（基 之面上，而於該介電體11之另一面上貼附另_樹月旨 •W後，視需要而以保護(補強）材料覆蓋饋電圖案2。又， 亦視需要而以所需之樹脂材覆蓋標籤天線整體。 、如此，若不改變標籤天線之共振頻率而欲調整匹配， 或不改變匹配而欲調整共振頻率，則僅就單面上之圖案1、 2進行變更即可，故有利於節省成本。 、 [2]變形例 -前述之無線射頻識別標籤之導體圖案可為諸如第14圖 所不之形狀，亦可為第15圖所示之形狀。 、第14圖所不之無線射頻識別標籤具有天線圖案i彎折 ::!狀之形狀之字形)，前述π字圖案之寬度於局部形 15 、=窄之部分，則設有饋電圖案2以使雙極部21與天線圖案 1進行電磁感應耦合。 在此’本例中，㈣將雙極部21之電氣長度設定為半 向以下，而使流動於各雙極部21之電流之方向為同一方 :’以進行饋電。藉構成上述配置，則—如前述，可以近 Τ正方形之形狀(6Gmmx5Gmm)實現可獨立且輕易地調整隊 抗之電阻成分與電抗成分。 另，第15圖所示之無線射頻識別標籤採用所謂摺疊雙 極天線作為天線圖案丨，係與饋電圖案2組合之構造，益設 有饋電圖案2，以使前述天線圖案i之對向長邊(長度寞為爭 波長乃至略半波長）分別與L字上之雙極部21進行電磁感應 22 200905973 摩馬合。 然而，摺疊雙極天線1之對向長邊必須由相同方向之電 流流動於此，故各雙極部21與天線圖案1進行電磁感應耦合 之直線部分之方向宜形成彼此相反之方向。 5 產業上之利用可能性 如以上之詳細說明，依據本發明，可提供可獨立且輕 易地調整（控制）阻抗之電阻成分與電抗成分而易於小型化 之無線射頻識別標籤，故可極有效地應用於無線通訊技術 範疇、物品生產、存貨、流通管理等技術範疇。 10 【圖式簡單說明】 第1圖係顯示本發明一實施例之無線射頻識別標籤之 構造（導體圖案）之平面圖。 第2圖係顯示第1圖所示之無線射頻識別標籤之變形例 者。 15 第3圖係用以說明第2圖所示之無線射頻識別標籤之模 擬條件者。 第4圖係用以說明第3圖所示之模擬條件下之天線阻抗 與積體電路(標籤LSI)阻抗之關係之史密斯圖。 第5圖係顯示第3圖所示之模擬條件下之無線射頻識別 20 標籤之頻率對增益特性之圖表。 第6圖係顯示第3圖所示之模擬條件下之無線射頻識別 標籤之頻率對訊訊距離特性之圖表。 第7圖係用以說明本實施例之無線射頻識別標籤之第1 阻抗匹配方法者。 23 200905973 第8圖係用以說明本實施例之無線射頻識別標籤之第2 阻抗匹配方法者。 第9圖係用以說明本實施例之無線射頻識別標籤之第3 阻抗匹配方法者。 5 第10圖係用以說明本實施例之無線射頻識別標籤之第 4阻抗匹配方法者。 第11圖係用以說明本實施例之無線射頻識別標籤之第 5阻抗匹配方法者。 第12圖係用以說明本實施例之無線射頻識別標籤之第 10 6阻抗匹配方法者。 第13圖係用以說明本實施例之無線射頻識別標籤之製 造方法者。 第14圖係顯示第1圖及第2圖所示之無線射頻識別標籤 之變形例之平面圖。 15 第15圖係顯示第1圖及第2圖所示之無線射頻識別標籤 之變形例之平面圖。 第16圖係用以說明習知技術之問題者。 【主要元件符號說明】 l···天線圖案(天線導體） 2···饋電圖案(匹配圖案、饋電 部） 3…積體電路 4…介電體(保護⑽強)構件） 5…樹脂材 10a、10b…樹月旨薄片 11—介電體(基板） 21…線形圖案(雙極部、第1饋電 導體） 22…環形圖案(第2饋電導體） 100…天線圖案 300···積體電路 400.·.保護構件 2410 J. A /, - Person, the following describes the impedance adjustment method of the aforementioned radio frequency identification tag. (Matching adjustment 1) The size of the ring pattern 22 15 of the matching pattern 2 as shown in a, b, and c of Fig. 7 (the length of the label antenna (the length of the paper surface) (electric length) Once changed, the impedance trace on the Smith chart will change as shown in Figure 7 (2). That is, if the length of the annular pattern 22 in the width direction is shortened, the upper and lower impedance tracks of the earth's Scheiss will rotate (change) in the counterclockwise direction. This increases the absolute value of the component B of the deduction. Therefore, the input susceptance of the tag antenna can be adjusted by changing the length of the aforementioned width direction of the ring pattern η. In addition, the rotation of the aforementioned impedance trace on the post-Study is counterclockwise. 17 200905973 At the same time, the circular shape of the impedance trajectory will also be reduced, and this means that the conductance component G will decrease. Therefore, once the length of the annular pattern 22 in the width direction is shortened, the input conductivity of the tag antenna can be adjusted together. However, in the conductance component and the susceptance component, the matching improvement is mainly based on the higher change promotion degree. (Matching adjustment 2) Further, as shown by a, b, and c of Fig. 8 (1), the length of the bipolar portion (two-line pattern) 21 of the matching pattern 2 (i.e., mainly electromagnetic induction with the antenna pattern 1) Once the length of the coupled part (electrical length) is changed, on the Smith chart, the 10 impedance trajectory will change as shown in (2) of Fig. 8. That is, if the length (electrical length) of each of the bipolar portions 21 is shortened, the division of the impedance trajectory will be reduced on the Smith chart. This means that the degree of coupling between the bipolar portion 21 and the electromagnetic induction coupling of the antenna pattern 1 is weakened, and the conductance component G is also reduced. Therefore, by changing the length (electrical length) of the bipolar portion 21, the input conductance of the 15 tag antenna can be mainly adjusted. (Matching adjustment 3) Further, as shown by a, b, and c of Fig. 9 (1), if the single length (electrical length) of the bipolar portion 21 of the matching pattern 2 is changed, the impedance trajectory is on the Smith chart. It will also change as shown in (2) of Figure 9. 20, that is, if the single length (electrical length) of the bipolar portion 21 is shortened, the degree of coupling of the electromagnetic induction coupling between the bipolar portion 21 and the antenna pattern 1 is weakened, and on the Smith chart, the impedance is also rounded. It will be reduced, so the conductance component G will decrease by 0. Therefore, even if the single length (electrical length) of the bipolar portion 21 is changed, the main 18 200905973 can also adjust the wheel human conductance of the tag antenna. (Matching adjustment 4) As shown in a, b, and c of (1) of the first figure, the f of the ring pattern 22 of the matching pattern 2 is small (the length of the tag antenna (length of the left and right sides of the paper) (electric length)) is changed right. On the Smith chart, the impedance trace will not change as in (1) of Figure 1. That is, the length of the long direction (electrical length) of the right shortening of the annular pattern 22 is such that on the Smith chart, the impedance trace will be rotated counterclockwise (change 10 15 20). The absolute value of this _ electric field correction increases. Therefore, the input pattern of the long pattern of the shape pattern 22 is long-term and the input/emission of the 〆 文 文 文. Money (electricity), the light-label antenna (2) towel's anti-clockwise change in the impedance trace of the history (4) 51, the impedance trace is also reduced (ie, the conductivity component is reduced) small). Therefore, the input conductance of the tag antenna can be adjusted together by shortening the length of the aforementioned long direction of the ring pattern 22. However, it is possible to adjust the conductivity component and the susceptance component to a higher degree of change promotion. Matching (matching adjustment 5) As shown in Fig. U, when the antenna pattern is covered by the dielectric body 4 such as epoxy resin to cover the matching pattern 2 (the bipolar suppression ring pattern 22) and the integrated body (10) for protection), By changing the dielectric constant of the dielectric body (hereinafter also referred to as a shirt protective material) 4, the electrical length of the bipolar portion 21 and the annular pattern 22 can be changed, so that matching adjustment can be performed. For example, when the dielectric constant 1 of the dielectric body 4 is increased, the ring pattern Μ 19 200905973 appears to increase and the absolute value of the susceptance decreases, and since the bipolar portion 21 appears to be elongated, the electrical conductivity is increased. Further, in Fig. 11, reference numeral 5 denotes a resin material covering the entire tag antenna. A calculation example is shown in Fig. 12. In Fig. 12, as shown in (1), it has been shown that the relative permittivity of the 5 dielectric body 4 = 1.5, the dielectric loss = 0.0 (example a), and the relative permittivity of the dielectric body = 1 〇, 〇, dielectric loss = 〇. 〇 (example of the simulation results of the example. (2) has shown the impedance change on the Smith chart (use band = 800MHz ~ 1,100MHz). However, in examples a, b, The relative permittivity of the resin material 5 covering the entire tag antenna is 3.0'. The dielectric loss tan is 1 〇 is 0. (Π. As can be seen from Fig. 12 (2), once the dielectric constant of the dielectric 4 is increased Then, the circle of the impedance trace on the Smith chart will expand, and it will rotate (change) slightly in the clockwise direction. This means that both the bipolar portion 21 and the ring pattern 22 look longer. Further, since the absolute value of the bipolar portion 21 is longer than 15 , the degree of coupling of the electromagnetic induction coupling of the feed pattern 2 and the antenna pattern 1 is enhanced, and as a result, the conductance component is increased. The dielectric constant of the LSI protective material 4 may also be locally changed. For example, the portion covering the bipolar portion 21 and the cover ring pattern 22 may be used. The dielectric constant is partially set independently. Thus, the electrical length of the bipolar portion 21 and the electrical length of the annular pattern 22 can be individually changed, so that the input conductivity and the input susceptance of the tag antenna can be individually adjusted. In the radio frequency identification tag of the present embodiment, by individually changing the size of the bipolar portion 21 and the ring pattern 2 2 of the feed pattern 2, it is possible to individually control (adjust) without changing the arrangement relationship (distance, etc.) with the antenna pattern 1. 20 200905973 Resistance component and reactance component (conducting component and susceptance component), so it is easy to perform impedance matching and easy to miniaturize the wireless camera. Also, antenna pattern 1 and feed pattern 2 (bipolar part 21) The ring pattern power system is physically separated, so that it is easy to design and manufacture individually, and the purpose 5 is easier to adjust the impedance change. The antenna pattern and the feed pattern 2 are physically In the state of separation and elimination, as shown in FIG. 11 , the antenna pattern is avoided, and the matching pattern 2 (the bipolar portion η and the annular pattern 22) and the integrated circuit 3 are covered by the dielectric 4 It is easier to perform the line protection (reinforcing). Therefore, the LSI protective material 4 does not have a portion that crosses the antenna pattern i as in the conventional technique, and can prevent the portion from being broken. (Manufacturing method) Next, The method for manufacturing the tag antenna described above is described. One of the methods is, for example, a single layer of a dielectric sheet (substrate) such as a polyethylene terephthalate (PET) or a printed substrate. A method of forming the antenna pattern 1 and the feed pattern 2. The formation order of each of the patterns 1 and 2 is either first or the same. Then, the feed pattern 2 is covered with a protective (reinforcing) member as needed. Cover the entire tag antenna with the required resin material as needed. Further, in another method, a method of independently forming the antenna pattern 1 and the feed pattern 2 on each surface of a dielectric body (base plate) such as a resin sheet or a printed board. That is, an antenna pattern is formed on one surface of the dielectric substrate, and the pattern 2 is fed on the other surface.乂, as shown in Fig. 13, (1) forming a pattern 1 on the surface of the first resin sheet 10a, and (2) forming a feed pattern 21 200905973 2 ' on the surface of the second resin sheet wb ( 3) one of the resin sheets 10a, 10b is attached to the dielectric body (the surface of the base), and the other side of the dielectric body 11 is attached with another _ tree. It is necessary to cover the feed pattern 2 with a protective (reinforcing) material. Also, the entire tag antenna is covered with the required resin material as needed. Thus, if the resonance frequency of the tag antenna is not changed, the matching is to be adjusted, or does not change. If the matching is to be adjusted, it is only necessary to change the patterns 1 and 2 on one side, which is advantageous for cost saving. [2] Modification - The conductor pattern of the aforementioned radio frequency identification tag may be, for example, the 14th The shape of the figure may also be the shape shown in Fig. 15. The radio frequency identification tag of Fig. 14 has the antenna pattern i bent: the shape of the shape of the !! shape, the width of the aforementioned π word pattern In the partial shape 15 and the narrow portion, the feed pattern 2 is provided to make the bipolar portion 21 and the antenna Case 1 for electromagnetic induction coupling. In this example, (4) the electric length of the bipolar portion 21 is set to be less than or equal to a half direction, and the direction of the current flowing through each of the bipolar portions 21 is the same: ' to perform feeding. By constituting the above configuration, as described above, the shape of the square (6Gmmx5Gmm) can be adjusted independently and easily to adjust the resistance component and the reactance component of the team. In addition, the radio frequency identification tag shown in FIG. 15 uses a so-called folded dipole antenna as an antenna pattern, and is combined with the feed pattern 2, and a feed pattern 2 is provided to make the antenna pattern i face each other. The long side (the length 寞 is the wavelength or even the half wavelength) is respectively electromagnetically induced with the bipolar portion 21 on the L-shape 22 200905973. However, the opposite long sides of the folded dipole antenna 1 must flow from the current in the same direction, so that the directions of the linear portions in which the respective bipolar portions 21 and the antenna pattern 1 are electromagnetically inductively coupled are preferably formed in directions opposite to each other. 5 Industrial Applicability As described above, according to the present invention, it is possible to provide a radio frequency identification tag which can independently and easily adjust (control) the resistance component and the reactance component of the impedance, and is easy to miniaturize, so that it can be extremely effective It is applied to the technical fields of wireless communication technology, item production, inventory, and circulation management. [Embodiment of the Drawing] Fig. 1 is a plan view showing the configuration (conductor pattern) of a radio frequency identification tag according to an embodiment of the present invention. Fig. 2 is a view showing a modification of the radio frequency identification tag shown in Fig. 1. 15 Figure 3 is a diagram showing the simulated conditions of the RFID tag shown in Figure 2. Fig. 4 is a Smith chart for explaining the relationship between the antenna impedance under the simulation conditions and the impedance of the integrated circuit (tag LSI) shown in Fig. 3. Figure 5 is a graph showing the frequency versus gain characteristics of the RFID tag 20 under the simulated conditions shown in Figure 3. Figure 6 is a graph showing the frequency versus signal distance characteristics of a radio frequency identification tag under the simulated conditions shown in Figure 3. Fig. 7 is a diagram for explaining the first impedance matching method of the radio frequency identification tag of the present embodiment. 23 200905973 Fig. 8 is a diagram for explaining the second impedance matching method of the radio frequency identification tag of the present embodiment. Fig. 9 is a diagram for explaining the third impedance matching method of the radio frequency identification tag of the present embodiment. 5 Fig. 10 is a diagram for explaining the fourth impedance matching method of the radio frequency identification tag of the present embodiment. Figure 11 is a diagram for explaining the fifth impedance matching method of the radio frequency identification tag of the present embodiment. Figure 12 is a diagram for explaining the 106th impedance matching method of the radio frequency identification tag of the present embodiment. Fig. 13 is a view for explaining the method of manufacturing the radio frequency identification tag of the embodiment. Fig. 14 is a plan view showing a modification of the radio frequency identification tag shown in Figs. 1 and 2. 15 Fig. 15 is a plan view showing a modification of the radio frequency identification tag shown in Figs. 1 and 2. Figure 16 is a diagram for explaining the problems of the prior art. [Description of main component symbols] l··· Antenna pattern (antenna conductor) 2···Feed pattern (match pattern, power feeding unit) 3...Integrated circuit 4...Dielectric body (protective (10) strong)) 5... Resin materials 10a, 10b, etc. 11-dielectric body (substrate) 21...linear pattern (bipolar portion, first feed conductor) 22...annular pattern (second feed conductor) 100...antenna pattern 300· ··Integrated circuit 400.·.protective member 24