201119141 六、發明說明： 本發明關於—種天線’特別關於—種平面多頻天線模 【先前技術】 無線傳輸廣泛地應用於電子產品，而為滿足消費者需 求，現今許多電子產品大多具有無線傳輸的功能。在^ 傳輸系統中，天線是用來發射與接收電磁波能量的重要元 件i若是沒有了天線’則無線傳輸系祕會無法發射與接 队貝料。因此，天線的角色在無線傳輸來說，是不可或缺 的一環。 平面倒 F 天線（Pianar Inverted F Amenna，hfa )為目 前較普遍的天線架構，該天線可用來設計單頻帶、雙頻帶 或夕頻I的天線。圖1為一種習知plFA的示意圖，其中 —根天線11、12 ' 13皆為平面倒F天線之結構，三天線 U〜13可為相同頻率或不同頻率的天線。對於應用於筆記 型電腦的天線而纟，.天線需言史計成狹長型。以天、線n為 例，在狹長型的空間中，線段AiBiDi和AiBiCi分別工作 於V4模態，其他高階模態頻率過高（例如3λ/4模態）或 不容易激發（例如λ/2*λ模態），因此不易組合出雙寬頻 2寬頻的特性。因此上述平面倒F天線架構可用來設計「雙 窄頻」的天線，卻不容易實現「雙寬頻」或「寬頻」特性 的天線。 另一個是應用PIFA天線架構設計多天線元件時，會 201119141 遭遇天線彼此干擾的問題。如圖1所示，天線11與12鄰 近擺設時，由於線段入旧/丨與A2B2C2末端彼此靠近而引 發電容耦合的現象，這會影響到天線本身的特性，且天線 11與12之間的隔離度將大幅下降。同樣地，天線12與 13亦會引發電容耦合的現象，而使得兩天線高頻帶的特性 和隔離度受到影響。 【發明内容】 有鑑於上述問題，本發明之目的為提供一種能夠實現 寬頻特性、且天線間不易引發電容耦合而影響天線特性的 平面多頻天線模組。 為達上述目的，一種平面多頻天線模組包含一基板以 及至少一天線圖案。天線圖案設置於基板上，並具有一第 一金屬線、一第二金屬線、一第三金屬線及一第四金屬 線。第二金屬線係與第一金屬線相對設置，並具有一接地 點。第三金屬線係設置於第一金屬線與第二金屬線之間， 且其一端係與第一金屬線連結，並將第一金屬線區分為一 第一輻射部及一第二輻射部，第三金屬線之另一端與第二 金屬線具有一間距，第三金屬線具有一饋入點。第四金屬 線之一端係與第二金屬線連結，且第四金屬線具有至少一 第一轉折部位於第二輻射部與第二金屬線之間，且第一轉 折部係至少部分於投影方向上與第二輻射部及該第二金 屬線重疊。 -承上所述，依據本發明之天線圖案，其中第一金屬象. 201119141 與第三金屬線係設計為高頻段的共振頻率，並搞合能量至 鄰近的接地線（其包含接地的第二金屬線與第四金屬線） .以激發第二金屬線與第四金屬線為低頻段的共振頻率，而 達到多頻段輻射的功能。並藉由設計第一輻射部與第二輻 射部之尺寸可輕易達到寬頻的特性。由於本發明並非使用 習知PIFA之技術，故可有效縮減天線間的耦合量，並獲 致良好的天線隔離度。此外，本發明之第四金屬線之第一 轉折部位於第二輻射部與第二金屬線之間，且第一轉折部 係至少部分於投影方向上與第二輻射部及第二金屬線重 疊，藉此可縮小天線尺寸而增加產品競爭力。 【貫施方式】 以下將參照相關圖式，說明依據本發明較佳實施例之 一種平面多頻天線模組。 請參照圖2A所示，本發明較佳實施例之一種平面多 頻天線模組2係包含一基板20以及至少一天線圖案30。 在本實施例中，基板20可例如為玻璃板、或塑膠板、或 電路板、或其他種類的基板。 天線圖案30設置於基板20上，並作為夭線模組2之 工作主體之一。天線圖案3 0所包含之線段係由導電材料 而製成，導電材料不限於金屬、或合金、或高分子導電材 料等，舉凡導電材料皆可作製成天線圖案30。 天線圖案30包含一第一金屬線31、一第二金屬線 32、一第三金屬線33及一第四金屬線34。在本實施例中， 6' 201119141 第一金屬線31係以線段ecd為例。第二金屬線32係與第 一金屬線31相對設置，並具有一接地點。本實施例之第 一金屬線32係以線段AD及其所延伸的線段為例，而接地 點係以b點為例。 第二金屬線33係設置於第一金屬線3丨與第二金屬線 32之間，且其一端係與第一金屬線31連結，並將第一金 屬線31區分為一第一輻射部311及一第二輻射部312。第201119141 VI. INSTRUCTIONS: The present invention relates to antennas in particular to planar multi-frequency antenna modules. [Prior Art] Wireless transmission is widely used in electronic products. To meet consumer demand, many electronic products today mostly have wireless transmission. The function. In the ^ transmission system, the antenna is an important component for transmitting and receiving electromagnetic wave energy. If there is no antenna, then the wireless transmission system secret will not be able to transmit and take over the material. Therefore, the role of the antenna is an integral part of wireless transmission. The Pianar Inverted F Amenna (hfa) is a more common antenna architecture that can be used to design single-band, dual-band or evening-frequency I antennas. 1 is a schematic diagram of a conventional plFA, in which the antennas 11, 12' 13 are all planar inverted-F antennas, and the three antennas U~13 can be antennas of the same frequency or different frequencies. For the antenna applied to the notebook, the antenna needs to be counted as a narrow type. Taking the sky and the line n as an example, in the narrow space, the line segments AiBiDi and AiBiCi operate in the V4 mode, respectively, and other high-order mode frequencies are too high (for example, 3λ/4 mode) or are not easily excited (for example, λ/2). *λ mode), so it is not easy to combine the characteristics of double broadband 2 wide frequency. Therefore, the above-mentioned planar inverted-F antenna architecture can be used to design a "double-narrowband" antenna, but it is not easy to implement a "double-bandwidth" or "broadband" antenna. The other is that when the multi-antenna components are designed using the PIFA antenna architecture, the 201119141 encounters interference with the antennas. As shown in FIG. 1, when the antennas 11 and 12 are disposed adjacent to each other, the phenomenon of capacitive coupling is caused by the line segment entering/delaying and the A2B2C2 end being close to each other, which affects the characteristics of the antenna itself and the isolation between the antennas 11 and 12. Will drop dramatically. Similarly, antennas 12 and 13 also cause capacitive coupling, which affects the characteristics and isolation of the high frequency bands of the two antennas. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a planar multi-frequency antenna module capable of realizing wide-band characteristics and having less difficulty in causing capacitive coupling between antennas and affecting antenna characteristics. To achieve the above object, a planar multi-frequency antenna module includes a substrate and at least one antenna pattern. The antenna pattern is disposed on the substrate and has a first metal line, a second metal line, a third metal line and a fourth metal line. The second metal wire is disposed opposite the first metal wire and has a grounding point. The third metal wire is disposed between the first metal wire and the second metal wire, and one end thereof is coupled to the first metal wire, and the first metal wire is divided into a first radiation portion and a second radiation portion. The other end of the third metal line has a spacing from the second metal line, and the third metal line has a feed point. One end of the fourth metal wire is coupled to the second metal wire, and the fourth metal wire has at least one first turning portion between the second radiating portion and the second metal wire, and the first turning portion is at least partially in a projection direction The upper surface overlaps with the second radiation portion and the second metal line. According to the antenna pattern of the present invention, the first metal image. 201119141 and the third metal line are designed to have a high frequency resonance frequency and combine energy to an adjacent ground line (which includes a grounded second The metal wire and the fourth metal wire) function to excite the second metal wire and the fourth metal wire to a resonance frequency of a low frequency band to achieve multi-band radiation. Broadband characteristics can be easily achieved by designing the dimensions of the first radiating portion and the second radiating portion. Since the present invention does not use the conventional PIFA technology, the coupling amount between the antennas can be effectively reduced, and good antenna isolation can be obtained. In addition, the first turning portion of the fourth metal wire of the present invention is located between the second radiating portion and the second metal wire, and the first turning portion is overlapped with the second radiating portion and the second metal wire at least partially in the projection direction. In this way, the size of the antenna can be reduced to increase the competitiveness of the product. [Complex Mode] A planar multi-frequency antenna module according to a preferred embodiment of the present invention will be described below with reference to the related drawings. Referring to FIG. 2A, a planar multi-frequency antenna module 2 according to a preferred embodiment of the present invention includes a substrate 20 and at least one antenna pattern 30. In the present embodiment, the substrate 20 can be, for example, a glass plate, or a plastic plate, or a circuit board, or other kind of substrate. The antenna pattern 30 is disposed on the substrate 20 and serves as one of the working bodies of the twisting module 2. The line segment included in the antenna pattern 30 is made of a conductive material, and the conductive material is not limited to a metal, an alloy, or a polymer conductive material, and the conductive material can be used as the antenna pattern 30. The antenna pattern 30 includes a first metal line 31, a second metal line 32, a third metal line 33, and a fourth metal line 34. In the present embodiment, the 6' 201119141 first metal line 31 is exemplified by the line segment ecd. The second metal wire 32 is disposed opposite the first metal wire 31 and has a grounding point. The first metal line 32 of this embodiment is exemplified by the line segment AD and the line segment extending therefrom, and the ground point is exemplified by point b. The second metal wire 33 is disposed between the first metal wire 3丨 and the second metal wire 32, and one end thereof is coupled to the first metal wire 31, and the first metal wire 31 is divided into a first radiation portion 311. And a second radiating portion 312. First
三金屬線33之另一端與第二金屬線32具有一間距，.第三 金屬線33具有一饋入點。於此，第三金屬線％係以線段 ac為例，第-輕射部3U係以線段ec為例，第二輕射部 係以線段cd為例，饋入點係以a點為例，且饋入點與接地 點係相對設置。另外’本實施例中，第一金屬線Μ與第 三金屬線33係共同形成τ型。 一 啼你興弟二金屬 弟四金屬線34 四金屬線34具有至少一第—轉折部344位於第I輻射部 312與第二金屬線32之間，且第一轉折部3料係至八 於投影方向上與第二韓射部312及第二金屬線Μ重^ 本實施例中，第四金屬線34係以線段ABC為例，且:鱼 第-金屬線3 2連結之一端係以A點為例。第—轉：: 係以由第四金屬線34之另—端（c點）開始之轉折為 ^其至少部㈣於投影方向上（以Y方向為例）與第二輕 、部312及第二金屬線32重疊。本實施例之第—轉折^ 344係形成類似「U」型，1中ΐτ % „ .. 軺折邛 線33。 」UU的開口係背對第三金屬 201119141 ^ 第四至屬線34更可具有一第三輕射部341、— 弟四輪射部342及一第五輕射部343。於此，第三輕 t以線段W為例，第四輕射部342係以線段NB為 | ’弟五fe射部係以線段AB•為例。第四 :靖第三輕射部—(㈣及第五輕射= 之鳊（B點）連結，第三輻射部34 =，344連結，_射部心= 心! 金屬、線32連結。由另一角度來看，本實施 四金屬線34，其—端係與第二金屬線”連結，、又 屬後，其另一端位於第—金屬、線31與第二金The other end of the tri-metal wire 33 has a spacing from the second metal wire 32. The third metal wire 33 has a feed point. Here, the third metal line % is taken as an example of the line segment ac, the first light-emitting portion 3U is taken as an example of the line segment ec, and the second light-emitting portion is taken as an example of the line segment cd, and the feed point is taken as an example. And the feed point is opposite to the ground point. Further, in the present embodiment, the first metal wire and the third metal wire 33 together form a τ type. As soon as you see the second metal wire 34, the four metal wires 34 have at least one first turning portion 344 between the first radiating portion 312 and the second metal wire 32, and the first turning portion 3 is tied to eight In the projection direction, the second Korean portion 312 and the second metal wire are overlapped. In the embodiment, the fourth metal wire 34 is exemplified by the line segment ABC, and one end of the fish-metal wire 3 2 is connected with A. Point as an example. The first turn:: the turn from the other end (point c) of the fourth metal wire 34 to at least part (four) in the projection direction (in the Y direction as an example) and the second light, part 312 and The two metal wires 32 overlap. The first-turning 344 of the present embodiment is similar to the "U" type, and the ΐτ % „ .. 轺 邛 line 33 in the middle. The opening of the UU is back to the third metal 201119141 ^ fourth to the genus 34 There is a third light-emitting portion 341, a four-four-shot portion 342, and a fifth light-emitting portion 343. Here, the third light t is exemplified by the line segment W, and the fourth light-emitting portion 342 is defined by the line segment NB as the line segment AB•. Fourth: Jing third light shot department - ((4) and fifth light shot = then (B point) link, the third radiation part 34 =, 344 link, _ shoot heart = heart! Metal, line 32 link. From another point of view, the fourth metal wire 34 of the present embodiment is connected to the second metal wire, and belongs to the rear, and the other end is located at the first metal, the wire 31 and the second gold.
方^川另外’第四輕射部342之長軸方向（以X 輻射部312之長軸方向平行，且第吨 L = 射部312於長軸方向上齊平，並於長軸 °間隔有一距離（d點與N點之距離）。 線3Π本實施例之天線圖案3〇可更包含一第五金屬 ”端（D點）係與第二金屬線32連結，且第五 至少一第二轉折部354位於第-輻射： 之間，且第二轉折部别係至少部分於 屬線32 f ^ Υ方向為例）上與第—韓射部311及第二金 ^線實施例中，第五金屬線35.之形狀與第 狀。第开^狀大致為以弟二金屬線33為軸之對稱形 =紅金屬線35更具有—第六輻射部351 一第七幸^ 邛52及一第八輻射部353。第七輻 盘篦丄耘紅切。 丨又兩知分別 ”弟，、幸田身Μ 35!之-端與第八韓射部353之一端連結， 201119141 第六輻射部351之另一端（R點）係與第二轉折部354連 結，第八輻射部353之另一端（D點）係與第二金屬線連 结。 V、口 請同時參照圖2A及圖3所示，其中圖3為本實施例 之天線圖案30所設計的工作頻率與反射係數的示意圖。 藉由饋入點與接地點的激發，並設計線段ace與acd的長 度，使第三金屬線33與第一輻射部311 (線段ace)以及 第三金屬線33與第二輻射部312 (線段acd)分別操作於 .一第二頻段之附近，並用於激發第四金屬線34 (線 段ABC)及第五金屬線（線段DEF)。在本實施例中，線 段ace與ac(i的長度略小於h/4 (m=c/込）；當然，線段 ace與acd的長度可依實際需要而調整。另外’第一輻射 部311與第二輻射部312可等長或不等長。 此外，本實施例可藉由微調第一輻射部311與第二輻 射部312之尺寸而達到寬頻特性。例如當第一輻射部311 • 與第二輻射部不等長時，可使天線具有較寬之操作頻 段f3。 第一金屬線31與第三金屬線33可激發第四金屬線34 及第五金屬線35。設計線段ABC與DEF的長度，使第四 金屬線34及第五金屬線35分別操作於一第一頻段（& ) 及一第二頻段（f*2)。在本實施例中，線段ABC與DEF的 長度分別略小於λ〗/4 ( λρε/ A )與、/4 ( λ2=〇/ f2 );當然， 線段ABC與DEF的長度可依實際需要而調整。另外，第 二輻射部312與第四輻射部342之間距（d點與N點之距 201119141 離）與第一輻射部311與第七輻射部352之間距（e點與 Q點之距離）係可等長或不等長，其中當不等長時，可使 天線具有較寬之操作頻段&與f2。 請參照圖2B所示，在本實施例中，天線模組2更可 包含其他的天線圖案，例如天線圖案40及50。天線圖案 40及50係與天線圖案30之形狀類同；當然，根據實際操 作頻段及頻寬之需求，天線圖案40與50在形狀及尺寸上 可有些許調整。 於此，天線圖案50係與天線圖案30呈對稱，其亦包 含一第一金屬線51至第五金屬線55，其饋入點為a’點， 接地點為b’點，其技術特徵可參照天線圖案30，於此不再 贅述。天線圖案40之形狀係與天線圖案30類同，天線圖 案亦包含第一金屬線41至第五金屬線45，饋入點為c點， 接地點為d點，其技術特徵亦可參照天線圖案30，於此不 再贅述。天線圖案40與天線圖案30之主要差別在於，天 線圖案40之第一金屬線41與第四金屬線44之第四輻射 部442以及第五金屬線45之第七輻射部452於投影方向 上間隔有一距離L。距離L所產生的空間可供其他元件設 置，例如供筆記型電腦的卡榫結構設置。 另外，天線圖案30〜50間的金屬線可部分共用。例 如天線圖案30的第五金屬線35係與天線圖案40的第四 金屬線44共用線段ED，天線圖案40的第五金屬線45與 天線圖案50的第五金屬線55共用線段IH。藉此，可縮小 天線模組2的尺寸，進而節省成本並提高產品競爭力。 201119141 另外，圖2C係顯示天線模組2之又一變化態樣，如 圖2C所示，與圖2B之天線模組2之主要不同在於，圖 2C之天線模組2之第二金屬線32、42、52係呈面狀，而 擴大接地面的面積，以使天線能夠輻射。此外，圖2D係 顯示天線模組2之另一變化態樣，如圖2D所示，天線模 組2更包含一金屬片60，金屬片60係與第二金屬線32、 42、52電性連接，且於此，金屬片60係覆蓋第二金屬線 32、42、52並往下方延伸，作為天線模組2的接地面，而 擴大接地面的面積，以使天線能夠輻射。 諸金昭7R泠圖3所彔，關於丟媳1S1銮40，错針媳 段DEG，使其工作於第零頻段（f〇)，另外設計線段HIJ 使其工作於頻率fo+δ，δ約50〜100MHz。在正常狀態下， 天線圖案40主要是由第四金屬線（線段DEG)來接收信 號，當有介電質（例如手機或筆電機殼）靠近天線模組2 時，由於天線共振頻率往低頻漂移，因此天線模組2換由 第五金屬線（線段HIJ)接收信號。 請參照圖4所示，其係將天線模組2安裝於筆記型電 腦上緣的情況下所量測到之天線圖案30、40、50的反射 係數及操作頻率之關係圖，於圖4中之細線部分係對應天 線圖案30,粗線部分係對應天線圖案40,虛線部分係對 應天線圖案50。於本實施例中，天線圖案30、40、50的 操作頻寬皆位於反射係數小於-6dB的可用範圍。由圖4可 清楚得知，天線圖案30明顯擁有兩個寬頻帶的特性；另 外，天線圖案50於實際量測中亦擁有兩個寬頻帶的特性， Γ ，1 11 201119141 天線圖案40於1570MHz附近有兩個共振點。在本實施例 中，天線圖案30及50係可應用於無線區域網路（Wireless Local Area Network，WLAN a/b/g)之頻段，天線圖案 40 可應用於全球定位系統（GP S )之頻段。 當然，本實施例之天線模組2及繪示的圖式僅為舉例 說明’並非用以限制本發明。在實施上，為符合選擇之操 作頻帶及頻寬’可在天線尺寸、形狀及線段寬度作些微調 整。 請參照圖5A所示，其係顯示本發明天線模組之另一 態樣。天線模組2a包含一基板20及兩天線圖案30a及 5〇a。上述實施例之天線模組2為三天線元件，而本實施例 之天線核組2a為雙天線元件，並以應用於無線區域網路 (WLAN)為例。其中，天線圖案5〇a之技術特徵與上述 之天線圖案50 _同，於此不再贅述。 天線圖案3〇a與天線圖案3〇主要差別在於’天線圖案 3〇&之第一金屬線33a具有至少一轉折331，在本實施例 中’多個轉折331係位於第三金屬線33a靠近第二金屬線 32&之一端。饋入點（a點）係設置於轉折331之末端，並 與接地點（b點）相對設置。轉折331係用以調整天線的 反射係數並作阻抗匹配用。 另外’圖53係顯示天線模組2a之又一變化態樣，如 圖5B所示’與圖5A之天線模組2a之主要不同在於，圖 5B之天線模組以之第二金屬線32a、52a係呈面狀，而擴 大接地面的面積，以使天線能夠輻射。此外’圖5C係顯 12 201119141 不天線松組2a之另一變化態樣，如圖5(：所示，天線模組 2&更包合一金屬片60，金屬片60係與第二金屬線32a、 52&電性連接，且於此，金屬片60係覆蓋第二金屬線32a、 52a並往下方延伸，作為天線模組以的接地面，而擴大接 地面的面積，以使天線能夠輻射。 請參照圖6所示，其係將天線模組2a安裝於筆記型電 腦上緣的情況下所量測到之天線圖案3〇a、5〇a的反射係數 及操作頻率之關係圖，於圖6中之細線部分係對應天線圖 案30a，虛線部分係對應天線圖案5〇a。於本實施例中，天 線圖案30a與50a的操作頻寬皆位於反射係數小於的 可用範圍。 請參照圖7A所示，其係顯示本發明天線模組之另一 態樣。天線模組2b包含一基板20及三天線圖案30b、40b 及50b。本實施例之天線模組2b為三天線元件。在本實施 例中，天線圖案30b及50b係應用於、WLAN為例，而天線 圖案40b係以應用於無線廣域網路（Wireless Wide Area Network，WWAN)為例，其中WWAN之操作頻帶係約 1710MHz〜2170MHz。 本實施例之天線圖案30b與上述天線圖案30及30a 在形狀上之主要差別在於，天線圖案30b不具有第五金屬 線，另外，天線圖案50b亦不具有第五金屬線。 另外，圖7B係顯示天線模組2b之又一變化態樣，如 圖7B所示，與圖7A之天線模組2b之主要不同在於，圖 7B之天線模組2b之第二金屬線32b、42b、52b係呈面狀， 13 201119141 而擴大接地面的面積，以使天線能夠輻射。此外，圖7C 係顯示天線模組2b之另一變化態樣，如圖7C所示，天線 模組2b更包含一金屬X 60，金屬片60係與第二金屬線 32b、42b、52b電性連接，且於此，金屬片60係覆蓋第二 金屬線32b、42b、52b並往下方延伸，作為天線模組2b 的接地面，而擴大接地面的面積，以使天線能夠輻射。 請同時參照圖7A及圖8所示，其中圖8為本實施例 之天線圖案30b、40b及50b.所設計的工作頻率與反射係 數的示意圖。以天線圖案30b而言，其第一金屬線3 lb及 第三金屬線33b (線段acd及ace )負責高頻帶（f3 )的輻 射，並電容耦合至線段ABC。設計線段ABC的長度，使 其工作於頻率A。線段ABC略小於λ"4 (Xfc/ ί\)，線段 acd及ace長度略小於λ3/4 ( λ3=ο/ f3 )。以天線圖案40b而 言，設計線段DEG及HIJ的長度，使其工作於頻率f5與 f4。線段HIJ及DEG之長度分別小於λ4/4 ( X4=c/ f4 )及λ5/4 (X5=c/ f5)。此外，天線圖案40b之第三金屬線43b具有 至少一轉折431。於此，多個轉折431位於第三金屬線43b 較靠近第二金屬線42b之一端，轉折431等效於一串聯電 感，可用於調整天線圖案40b之反射係數。 請參照圖9所示，其係將天線模組2b安裝於筆記型 電腦上緣的情況下所量測到之天線圖案30b、40b、50b的 反射係數及操作頻率之關係圖，於圖9中之細線部分係對 應天線圖案30b，粗線部分係對應天線圖案40b，虛線部 分係對應天線圖案50b。於本實施例中，天線圖案30b、 14. 201119141 40b與50b的操作頻寬皆位於反射係數小於-6dB的可用範 圍。 综上所述，本發明部分之天線圖案（第一金屬線與第 三金屬線）可類似一 T型圖案，其可設計為高頻段的共振 頻率，並耦合能量至周遭的接地線（第四金屬線與第五金 屬線）。T型金屬線兩側可具有兩條接地線，用以設計兩個 低頻的共振頻率來增加頻寬。此外，第四金屬線與第五金 屬線設置於T型金屬線的下方，可縮小天線圖案的尺寸（例 如A點至D點的距離），並且容易調整線段的長度及耦合 量。此外，以本發明之三天線元件為例，三根天線的結構 皆相似，而方便設計。並且相鄰設置之天線圖案可共用線 段（例如線段DE與HI)，可縮短天線整體長度。 以上所述僅為舉例性，而非為限制性者。任何未脫離 本發明之精神與範疇，而對其進行之等效修改或變更，均 應包含於後附之申請專利範圍中。 【圖式簡單說明】 圖1為一種習知平面倒F天線的示意圖； 圖2A及圖2B為本發明較佳實施例之一種平面多頻天 線拉組的不意圖， 圖2C為圖2B之天線模組之第二金屬線呈面狀的示意 圖， 圖2D為圖2B之天線模組更包含一金屬片的示意圖； 圖3為圖2B之天線圖案所設計的工作頻率與反射係 Γ <- 15 201119141 數的不意圖， 圖4為圖2B之天線圖案實際量測到的反射係數及操 作頻率之關係圖； 圖5A為本發明較佳實施例之平面多頻天線模組的另 一示意圖； 圖5B為圖5A之天線模組之第二金屬線呈面狀的示意 圖， 圖5C為圖5A之天線模組更包含一金屬片的示意圖 圖6為圖5A之天線圖案所設計的工作頻率與反射係 數的不意圖， 圖7A為本發明較佳實施例之平面多頻天線模組的再 一示意圖； 圖7B為圖7A之天線模組之第二金屬線呈面狀的示意 圖； 圖7C為圖7A之天線模組更包含一金屬片的示意圖； 圖8為圖7A之天線圖案所設計的工作頻率與反射係 數的不意圖，以及 圖9為圖7A之天線圖案實際量測到的反射係數及操 作頻率之關係圖。 【主要元件符號說明】 11、12、13 :天線 2、2a、2b :平面多頻天線模組 2 0 :基板 16 201119141 30、 30a、30b、40、40b、50、50a、50b :天線圖案 31、 31a、31b、41、41b、51、51b ··第一金屬線 311 :第一輻射部 312 :第二輻射部 32、 32a、32b、42、42b、52、52a、52b :第二金屬線 33、 33a、33b、43、43b、53、53b :第三金屬線 331、431 :轉折 34、 34a、34b、44、44b、54、54b :第四金屬線 341 :第三輻射部 342、442 :第四輻射部 343 :第五輻射部 344 :第一轉折部 35、 35a、45、45a、55 :第五金屬線 351 :第六輻射部 352、452 :第七輻射部 ， 353 :第八輻射部 354 :第二轉折部 60 :金屬片 L :距離 17In addition, the long axis direction of the fourth light-emitting portion 342 is parallel to the long axis direction of the X-radiation portion 312, and the ton L = the portion 312 is flush in the long-axis direction and has a space at the long axis. The distance (the distance between point d and point N). The antenna pattern 3 of the present embodiment may further include a fifth metal end (point D) coupled to the second metal line 32, and the fifth at least one second The turning portion 354 is located between the first radiation: and the second turning portion is at least partially in the direction of the genus 32 f ^ 为 direction) and the first and second ray portions 311 and the second gold wire embodiment, The shape and the shape of the five metal wires 35. The first opening shape is substantially a symmetrical shape with the second metal wire 33 as an axis = the red metal wire 35 has a - sixth radiating portion 351, a seventh lucky ^ 52 and one The eighth radiating portion 353. The seventh spoke plate is red-cut. The two sides are respectively separated from each other, "the younger brother, the Koda body, the 35-to-end, and the eighth end of the eighth Korean shooting portion 353, 201119141 sixth radiating portion 351 The other end (point R) is coupled to the second inflection portion 354, and the other end (point D) of the eighth radiating portion 353 is coupled to the second metal wire. V, Port Please also refer to FIG. 2A and FIG. 3, wherein FIG. 3 is a schematic diagram of the operating frequency and reflection coefficient of the antenna pattern 30 of the present embodiment. By exciting the feed point and the ground point, and designing the lengths of the line segments ace and acd, the third metal line 33 and the first radiating portion 311 (line segment ace) and the third metal line 33 and the second radiating portion 312 (line segment) Acd) operates in the vicinity of a second frequency band and is used to excite the fourth metal line 34 (line segment ABC) and the fifth metal line (line segment DEF). In this embodiment, the lengths of the line segments ace and ac (i are slightly smaller than h/4 (m=c/込); of course, the lengths of the line segments ace and acd can be adjusted according to actual needs. In addition, the 'first radiation portion 311 and The second radiating portion 312 can be of equal length or unequal length. Further, in this embodiment, the broadband characteristic can be achieved by fine-tuning the sizes of the first radiating portion 311 and the second radiating portion 312. For example, when the first radiating portion 311 • When the two radiating portions are not equal in length, the antenna can have a wider operating frequency band f3. The first metal line 31 and the third metal line 33 can excite the fourth metal line 34 and the fifth metal line 35. The design line segments ABC and DEF The length of the fourth metal line 34 and the fifth metal line 35 are respectively operated in a first frequency band (&) and a second frequency band (f*2). In this embodiment, the lengths of the line segments ABC and DEF are respectively slightly. It is smaller than λ / / 4 ( λρ ε / A ) and / 4 ( λ2 = 〇 / f2 ); of course, the lengths of the line segments ABC and DEF can be adjusted according to actual needs. In addition, the second radiating portion 312 and the fourth radiating portion 342 The distance between the d-point and the N-point 201119141 and the distance between the first radiating portion 311 and the seventh radiating portion 352 (the distance between the e point and the Q point) The antennas can be of equal length or unequal length, wherein when they are not equal in length, the antenna can have a wider operating frequency band & f2. Referring to FIG. 2B, in the embodiment, the antenna module 2 is further Other antenna patterns may be included, such as antenna patterns 40 and 50. Antenna patterns 40 and 50 are similar in shape to antenna pattern 30; of course, antenna patterns 40 and 50 are in shape and size depending on the actual operating frequency band and bandwidth requirements. There may be some adjustments. Here, the antenna pattern 50 is symmetrical with the antenna pattern 30, and also includes a first metal line 51 to a fifth metal line 55, the feeding point is a' point, and the grounding point is b' For the technical features, reference may be made to the antenna pattern 30, which will not be described herein. The shape of the antenna pattern 40 is similar to that of the antenna pattern 30, and the antenna pattern also includes the first metal line 41 to the fifth metal line 45, and the feeding point is Point c, the ground point is point d, and the technical feature can also refer to the antenna pattern 30, which will not be described here. The main difference between the antenna pattern 40 and the antenna pattern 30 is that the first metal line 41 and the fourth metal of the antenna pattern 40 are The fourth radiating portion 442 of the line 44 and the fifth metal The seventh radiating portion 452 of the line 45 is spaced apart by a distance L in the projection direction. The space generated by the distance L can be set by other components, such as a cassette structure for a notebook computer. In addition, the metal between the antenna patterns 30 to 50 The lines may be partially shared. For example, the fifth metal line 35 of the antenna pattern 30 shares the line segment ED with the fourth metal line 44 of the antenna pattern 40, and the fifth metal line 45 of the antenna pattern 40 is shared with the fifth metal line 55 of the antenna pattern 50. The line segment IH can thereby reduce the size of the antenna module 2, thereby saving cost and improving product competitiveness. In addition, FIG. 2C shows another variation of the antenna module 2. As shown in FIG. 2C, the main difference from the antenna module 2 of FIG. 2B is that the second metal line 32 of the antenna module 2 of FIG. 2C 42, 42 and 52 are planar, and the area of the ground plane is enlarged to enable the antenna to radiate. In addition, FIG. 2D shows another variation of the antenna module 2. As shown in FIG. 2D, the antenna module 2 further includes a metal piece 60, and the metal piece 60 and the second metal wire 32, 42 and 52 are electrically connected. In connection, the metal piece 60 covers the second metal wires 32, 42, 52 and extends downward to serve as a ground plane of the antenna module 2, and enlarges the area of the ground plane to enable the antenna to radiate. Zhu Jinzhao 7R 泠 Figure 3, about the lost 1S1銮40, the wrong needle segment DEG, so that it works in the zeroth frequency band (f〇), and additionally design the line segment HIJ to work at the frequency fo + δ, δ 50~100MHz. In the normal state, the antenna pattern 40 is mainly received by the fourth metal wire (line segment DEG). When a dielectric material (such as a mobile phone or a pen motor casing) is close to the antenna module 2, the antenna resonance frequency is low frequency. Drift, so the antenna module 2 receives signals from the fifth metal line (line segment HIJ). Please refer to FIG. 4 , which is a relationship diagram between the reflection coefficient and the operating frequency of the antenna patterns 30 , 40 , and 50 measured when the antenna module 2 is mounted on the upper edge of the notebook computer. The thin line portion corresponds to the antenna pattern 30, the thick line portion corresponds to the antenna pattern 40, and the broken line portion corresponds to the antenna pattern 50. In this embodiment, the operating bandwidths of the antenna patterns 30, 40, 50 are all in a usable range where the reflection coefficient is less than -6 dB. As is clear from FIG. 4, the antenna pattern 30 obviously has two characteristics of a wide band; in addition, the antenna pattern 50 also has two characteristics of wide band in actual measurement, Γ, 1 11 201119141 antenna pattern 40 is near 1570 MHz. There are two resonance points. In this embodiment, the antenna patterns 30 and 50 can be applied to a frequency band of a Wireless Local Area Network (WLAN a/b/g), and the antenna pattern 40 can be applied to a frequency band of a Global Positioning System (GP S ). . Of course, the antenna module 2 and the drawings shown in the present embodiment are merely illustrative and are not intended to limit the present invention. In practice, the antenna size, shape, and line width can be fine-tuned to match the selected operating frequency band and bandwidth. Referring to Figure 5A, there is shown another aspect of the antenna module of the present invention. The antenna module 2a includes a substrate 20 and two antenna patterns 30a and 5A. The antenna module 2 of the above embodiment is a three-antenna element, and the antenna core group 2a of the present embodiment is a dual antenna element, and is applied to a wireless local area network (WLAN) as an example. The technical features of the antenna pattern 5〇a are the same as those of the antenna pattern 50_, and will not be described herein. The main difference between the antenna pattern 3〇a and the antenna pattern 3〇 is that the first metal line 33a of the 'antenna pattern 3〇& has at least one turn 331. In the present embodiment, the plurality of turns 331 are located near the third metal line 33a. One end of the second metal line 32 & The feed point (point a) is placed at the end of the turn 331 and is disposed opposite the ground point (point b). The turning 331 is used to adjust the reflection coefficient of the antenna and perform impedance matching. In addition, FIG. 53 shows another variation of the antenna module 2a. As shown in FIG. 5B, the main difference from the antenna module 2a of FIG. 5A is that the antenna module of FIG. 5B is the second metal wire 32a. The 52a is planar and expands the area of the ground plane to enable the antenna to radiate. In addition, FIG. 5C shows another variation of the antenna loose group 2a. As shown in FIG. 5 (: the antenna module 2& further includes a metal piece 60, a metal piece 60 and a second metal line. 32a, 52& electrical connection, and the metal piece 60 covers the second metal wires 32a, 52a and extends downward to serve as a ground plane for the antenna module, and expands the area of the ground plane so that the antenna can radiate Please refer to FIG. 6 , which is a relationship diagram between the reflection coefficient and the operating frequency of the antenna patterns 3 〇 a and 5 〇 a measured when the antenna module 2 a is mounted on the upper edge of the notebook computer. The thin line portion in Fig. 6 corresponds to the antenna pattern 30a, and the broken line portion corresponds to the antenna pattern 5a. In this embodiment, the operating bandwidths of the antenna patterns 30a and 50a are both in the usable range where the reflection coefficient is smaller. The antenna module 2b includes a substrate 20 and three antenna patterns 30b, 40b and 50b. The antenna module 2b of the present embodiment is a three-antenna element. In the embodiment, the antenna patterns 30b and 50b are applied to, WL For example, the antenna pattern 40b is applied to a wireless wide area network (WWAN), wherein the operating band of the WWAN is about 1710 MHz to 2170 MHz. The antenna pattern 30b of the embodiment and the antenna pattern 30 and The main difference in shape of the 30a is that the antenna pattern 30b does not have the fifth metal line, and the antenna pattern 50b does not have the fifth metal line. In addition, FIG. 7B shows another variation of the antenna module 2b, such as As shown in FIG. 7B, the main difference from the antenna module 2b of FIG. 7A is that the second metal wires 32b, 42b, and 52b of the antenna module 2b of FIG. 7B are planar, 13 201119141, and the area of the ground plane is enlarged. In addition, FIG. 7C shows another variation of the antenna module 2b. As shown in FIG. 7C, the antenna module 2b further includes a metal X 60, a metal piece 60 and a second metal line 32b. 42b and 52b are electrically connected, and the metal piece 60 covers the second metal wires 32b, 42b, and 52b and extends downward to serve as a ground plane of the antenna module 2b, thereby expanding the area of the ground plane so that the antenna can Radiation. Please also participate 7A and 8 are schematic diagrams showing the operating frequency and reflection coefficient of the antenna patterns 30b, 40b, and 50b of the present embodiment. In the antenna pattern 30b, the first metal line 3 lb and The third metal line 33b (line segments acd and ace) is responsible for the radiation of the high frequency band (f3) and is capacitively coupled to the line segment ABC. The length of the line segment ABC is designed to operate at frequency A. The line segment ABC is slightly smaller than λ"4 (Xfc/ ί\), the length of the line segments acd and ace is slightly smaller than λ3/4 (λ3=ο/ f3 ). In the antenna pattern 40b, the lengths of the line segments DEG and HIJ are designed to operate at frequencies f5 and f4. The lengths of the line segments HIJ and DEG are smaller than λ4/4 (X4=c/f4) and λ5/4 (X5=c/f5), respectively. Further, the third metal line 43b of the antenna pattern 40b has at least one turn 431. Here, the plurality of corners 431 are located at one end of the third metal line 43b which is closer to the second metal line 42b. The turn 431 is equivalent to a series inductance and can be used to adjust the reflection coefficient of the antenna pattern 40b. Please refer to FIG. 9 , which is a relationship diagram between the reflection coefficient and the operating frequency of the antenna patterns 30 b , 40 b , and 50 b measured when the antenna module 2 b is mounted on the upper edge of the notebook computer. The thin line portion corresponds to the antenna pattern 30b, the thick line portion corresponds to the antenna pattern 40b, and the broken line portion corresponds to the antenna pattern 50b. In the present embodiment, the operating bandwidths of the antenna patterns 30b, 14.201119141 40b and 50b are all within the usable range of the reflection coefficient of less than -6 dB. In summary, the antenna pattern (the first metal line and the third metal line) of the present invention can be similar to a T-pattern, which can be designed as a resonant frequency of a high frequency band and coupled to the surrounding ground line (fourth Metal wire and fifth metal wire). T-wires can have two ground lines on either side to design two low frequency resonant frequencies to increase the bandwidth. Further, the fourth metal wire and the metal wire are disposed below the T-shaped metal wire, which can reduce the size of the antenna pattern (e.g., the distance from the point A to the point D), and it is easy to adjust the length and the coupling amount of the line segment. In addition, taking the three antenna elements of the present invention as an example, the structures of the three antennas are similar, and the design is convenient. And the adjacent antenna patterns can share the line segments (for example, the line segments DE and HI), and the overall length of the antenna can be shortened. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional planar inverted-F antenna; FIG. 2A and FIG. 2B are schematic diagrams of a planar multi-frequency antenna pull group according to a preferred embodiment of the present invention, and FIG. 2C is an antenna module of FIG. 2B. 2D is a schematic view of the antenna module of FIG. 2B further including a metal piece; FIG. 3 is a working frequency and reflection system designed by the antenna pattern of FIG. 2B <- 15 201119141 FIG. 4 is a diagram showing the relationship between the reflection coefficient and the operating frequency actually measured by the antenna pattern of FIG. 2B; FIG. 5A is another schematic diagram of the planar multi-frequency antenna module according to the preferred embodiment of the present invention; FIG. 5C is a schematic diagram of the second metal wire of the antenna module of FIG. 5A. FIG. 5C is a schematic diagram of the antenna module of FIG. 5A further including a metal piece. FIG. 6 is a working frequency and a reflection coefficient designed by the antenna pattern of FIG. 5A. FIG. 7A is a schematic diagram of a planar multi-frequency antenna module according to a preferred embodiment of the present invention; FIG. 7B is a schematic view showing a second metal line of the antenna module of FIG. 7A; FIG. 7C is a schematic view; The antenna module further includes a metal piece A schematic view; FIG 7A FIG 8 is a pattern of the antenna design and are not intended operating frequency of the number of reflection coefficients, and FIG. 7A to FIG. 9 is the actual amount of the antenna pattern and the measured reflection coefficient of the relationship between frequency operation. [Description of main component symbols] 11, 12, 13: Antenna 2, 2a, 2b: Planar multi-frequency antenna module 20: Substrate 16 201119141 30, 30a, 30b, 40, 40b, 50, 50a, 50b: Antenna pattern 31 31a, 31b, 41, 41b, 51, 51b ··first metal line 311: first radiating portion 312: second radiating portion 32, 32a, 32b, 42, 42b, 52, 52a, 52b: second metal wire 33, 33a, 33b, 43, 43b, 53, 53b: third metal wires 331, 431: turning 34, 34a, 34b, 44, 44b, 54, 54b: fourth metal wire 341: third radiating portion 342, 442 : fourth radiating portion 343 : fifth radiating portion 344 : first turning portion 35 , 35 a , 45 , 45 a , 55 : fifth metal wire 351 : sixth radiating portion 352 , 452 : seventh radiating portion, 353 : eighth Radiation portion 354: second turning portion 60: metal piece L: distance 17