1364133 九、發明說明： 【發明所屬之技術領域】 特別是一種利用耦 之多頻無線通訊裝 本發明係有關於一種多頻天線， 合式饋入（coupled-fed)來增加操作頻寬 置天線。 【先前技術】 • 隨著無線通訊技術的蓬勃發展，無線網路（wireless network)的應用越來越廣泛，而在筆記型電腦上的應用 除了傳統的無線區域網路（WLAN)之外更加入了全球 互通微波存取（WiMAX)、數位電視（DTV)以及行動通訊 (mobile communication)等多種應用。在這些盔 °。 應用中，天線的性能會影響通訊產品傳輸與接收信#二 質’為影響產品價值的重要關鍵之—。近年來由於行動 通訊系統的快速演進，從早期的GSM9〇〇/DCS雙頻操作 • 增加為現今的GSM850/900/DCS/PCS/UMTS多頻帶之操 作，以符合現今多頻通訊頻帶的需求。傳統倒F形天= 在有限的面積T ’利帛單-共振路徑在低頻若要達到 GSM850/900頻帶操作，是相當困難的挑戰，#台灣專利 公告號第1254,493號“一種雙頻倒F形天線”，苴揭示一 種利用筆記型電腦液晶螢幕支撐背板所内建的接地面， 在其接地面上設計倒F形天線達成雙頻操作的例子，該 天線設計在低頻只能涵蓋GSM9〇〇頻帶操作。而在一般 習知技術是外加寄生元件來增加頻寬，但會造成天線整 6 1364133 體體積的增加。 為了有效解決以上的問題’我們提出一種適用於筆 : 記型電腦的耦合式饋入多頻天線設計，其操作頻寬可涵 蓋 GSM850 ( 824 〜894 MHz)、GSM900 (890 〜960 MHz)、 DCS (1710〜1880 MHz)、PCS ( 1850 〜1990MHz)及 UMTS ( 1920〜2170MHz)之通訊頻帶的需求。此設計是主要由一 雙共振路徑之單一天線藉由耦合式饋入機制取代傳統的 • 直接饋入方式達成兩個共振頻帶的寬頻操作，其中低頻 頻帶主要是利用耦合式饋入之電容性降低天線整體之電 感性，再經由耦合式饋入與短路間適當的調整阻抗匹配 ，使得原先低頻之單一共振模態能多產生一個模態而達 成雙共振模態之效果以涵蓋GSM85〇/9〇〇頻帶操作且天 線結構簡單’易於印刷絲刻在介質基板上，使得製作 成本低廉，同時也達到天線體積縮小化之功效，故本發 明天線適合_於筆記型電腦等其他無線通訊之系統; w 部。 【發明内容】 署妥Ϊ上Γ述本發明之目的在於提供—種無線通訊裝1364133 IX. Description of the Invention: [Technical Field of the Invention] In particular, a multi-frequency wireless communication device is used. The present invention relates to a multi-frequency antenna, coupled-fed to increase an operating bandwidth antenna. [Prior Art] • With the rapid development of wireless communication technology, wireless networks are becoming more and more widely used, and applications on notebook computers are added in addition to traditional wireless local area networks (WLANs). A variety of applications such as global interoperability microwave access (WiMAX), digital television (DTV), and mobile communication. In these helmets °. In applications, the performance of the antenna affects the transmission and reception of the communication product as an important key to the value of the product. In recent years, due to the rapid evolution of mobile communication systems, dual-band operation from the early GSM9/DCS has been added to the current GSM850/900/DCS/PCS/UMTS multi-band operation to meet the needs of today's multi-frequency communication bands. Traditional inverted F-shaped days = in a limited area T 'Lee single-resonant path at low frequencies to achieve GSM850/900 band operation, is a very difficult challenge, #Taiwan Patent Bulletin No. 1254, 493 "a dual-frequency down "F-shaped antenna", 苴 reveals an example of using a built-in ground plane of a notebook computer LCD screen to support the backplane, and designing an inverted-F antenna on the ground plane to achieve dual-frequency operation. The antenna design can only cover GSM9 at low frequencies. 〇〇 band operation. In the conventional technique, parasitic elements are added to increase the bandwidth, but the antenna volume of the antenna is increased. In order to effectively solve the above problems, we propose a coupled feed multi-frequency antenna design suitable for pen: notebook computer, its operating bandwidth can cover GSM850 (824 ~ 894 MHz), GSM900 (890 ~ 960 MHz), DCS (1710 to 1880 MHz), PCS (1850-1580 MHz) and UMTS (1920~2170 MHz) communication band requirements. This design is mainly composed of a single antenna with a pair of resonant paths instead of the traditional • direct feed mode to achieve two broadband frequency bands by a coupled feed mechanism. The low frequency band is mainly reduced by the capacitive coupling of the feedthrough. The overall inductivity of the antenna is then properly adjusted impedance matching between the coupled feed and the short circuit, so that the single low frequency single resonant mode can generate a modality to achieve the double resonance mode effect to cover GSM85〇/9〇. 〇 Band operation and simple antenna structure 'Easy to print on the dielectric substrate, making the production cost low, and also achieving the effect of reducing the size of the antenna. Therefore, the antenna of the present invention is suitable for other wireless communication systems such as notebook computers; unit. SUMMARY OF THE INVENTION The purpose of the present invention is to provide a wireless communication device.
Μ > GSM850/900/DCS/PCS/UMTS A::多=作’且結構簡單’易於印刷或姓刻在介質 :用“ 天線體積縮小化之功效，相當適合 應用於葦記型電腦等無線裝置中。 7 1364133 本發明天線包括：一接地面，具有一短路點，且該 短路點位於該接地面之一側邊邊緣；及一輻射金屬元件 ，係以印刷或蝕刻技術形成，位於該支撐介質之單一表 面上，且該支撐介質位於該接地面之一邊緣附近，大致 平订朝外延伸，該輻射金屬元件並包含：一輻射部；一 饋入部，包含：一第一饋入部，具有一饋入點，該饋入 點為天線之饋入點，並連接至一訊號源；一第二饋入部 ，其一端連接至該輻射部，該第二饋入部與該第一饋入 部之間具有-特定間距；及—短路部，其—端電氣連接 至該輻射部，另一端電氣連接至該接地面之短路點。Μ > GSM850/900/DCS/PCS/UMTS A::Multiple = "and simple structure" is easy to print or surnamed in the medium: with "the effect of reducing the size of the antenna, it is quite suitable for wireless applications such as 苇7 1364133 The antenna of the present invention comprises: a ground plane having a short circuit point, and the short circuit point is located at one side edge of the ground plane; and a radiating metal component formed by printing or etching technology, located at the support On the single surface of the medium, and the supporting medium is located near one edge of the grounding surface, extending substantially outwardly, the radiating metal component comprises: a radiating portion; and a feeding portion comprising: a first feeding portion having a feed point, the feed point is a feed point of the antenna, and is connected to a signal source; a second feed portion, one end of which is connected to the radiation portion, and between the second feed portion and the first feed portion Having a specific spacing; and a shorting portion, the terminal being electrically connected to the radiating portion and the other end electrically connected to the short-circuit point of the grounding surface.
在本項發明天線中，該輻射部並包含一第一輻射部 及一第二輻射部，均共振在四分之一波長模態，其中該 第一輻射部所激發者為天線之第二操作頻帶，而該第二 輻射。P所激發者為第-操作頻帶，利用輕合式饋入技術 來降低第一操作頻帶（第二輻射部之四分之一波長共振 模態）的實部阻抗值，並調整該第一饋入部與該第二饋 入部之尺寸來有效地增加電容性，以降低第一操作頻^ 上第二輻射部之四分之一波長共振模態）之電感性，使 仔該四分之一波長共振頻率點附近額外增加了天線輸入 阻抗之虛部零點，再藉由適當調整該短路部的尺寸/即 I達到良好之阻抗匹配，使得該輻射部於第—操作頻帶 達成雙共振《之效果，可涵蓋無線廣域_(ww 所規定之GSM850 / 900 ( 824〜960 MHZ)之兩個頻段。同時 8 1364133 第二操作㈣為該第i射部所激發之— 以涵蓋⑽⑽/歸s㈤0〜2I7_z)之三個頻;。了 【實施方式】 第1圖為本發明天線實施例〗之結構圖，包含：一 支撐W質11接地面12，具有一短路點122，且該短 路點122位於該接地面之—侧邊邊緣i2i 輻射金屬 几件13 ’係以印刷或關技術形成，位於該切介質之 單一表面1Π上’且該支禮介質n位於該接地面之一側 邊邊緣121㈣，大致平行朝外延伸，包含：一輕射部 14，包含·一第一輻射部142 ，具有至少一次彎折；一 第二輻射部143，具有至少一次彎折，並連接至該第一 輻射部142 ; 一饋入部15，包含：—第—饋人部⑸， 具有-饋入點152，該饋入點152為天線之饋入點，並 連接至一訊號源17; —第二饋入部153 ，其一端連接至 該輻射部14，該第二饋入部153與該第一饋入部ΐ5ι之 間具有一特定間距154 ;及—短路部16，其—端電氣連 接至該輻射部14，另一端電氣連接至該接地面之短路點 122。 ’’ 第2圖為本發明天線實施例j的返回損失實驗量測 結果；在實施例1中’考慮筆記型電腦液晶螢幕内建之 接地面環境，我們選擇該接地面12之長度約為26〇mm、 寬度約為200mm ;而該輻射金屬元件13之長度約為59 mm、寬度約為11 mm及厚度約為0.8 mm，包含：一第 9 1364133 一輻射部142之長度約為31 mm (約為1900 MHz之四分之 一波長）、寬度約為2.5 mm ; —第二輻射部143之長产 約為94mm(約為900MHZ之四分之一波長）、寬度約^ 2.5mm ;該饋入部15，包含：一第一饋入部151之長; 約為18mm、寬度約為1〇1111 ; 一第二饋入部153之長二 約為21mm、寬度約為lmm，該第二饋入部153與 一饋入部151之間具有一特定間距154約為〇3_'了該 短路部16之長度約為6 _、寬度約為〇 3 mm ^由所得實 驗結果，在6dB返回損失的定義下，其第一操作頻帶u 約有158ΜΗζ(802〜960MHz)的操作頻寬，足以涵蓋無線 廣域網路（WWAN)之GSM850/900頻帶；而第二操作頻帶 22約有533MHz( 1708〜2241 MHz)的操作頻寬，可同時涵 蓋DCS、PCS及UMTS三個頻帶，亦符合多 / 。另，該特定間距則最寬到約3mm，在調 入部15之相關尺寸，亦可達到如第2圖近似之結果。 第3圖、第4圖、第5圖、第6圖及第7圖為本發 明天線實施例1分別於859、925、1795、192〇及2〇45 MHz之二維輻射場型圖，而其天線増益方面，在第一操 作頻帶21之增益大致為〇〜1OdBi ’在第二操作頻帶以之 天線增益大致為0.4〜2.7 dBi。由所得之結果，本發明天 線無論在低頻操作頻帶或高頻操作頻帶皆能符合實際無 線通訊產品之應用需求。 ' T… 第8圖為本發明天線-其它實施例8結構圖。其中 1364133 使得該輻射部14之 以藉此縮小天線之 。本發明之實施例 符合無線通訊產品 該輻射部14具有至少一次彎折801 ， 部份區間與該接地面12大致垂直，可 體積’其他天線結構與實施例1相似 8亦能達成與實施例1相似之結果， 的使用需求。 以上說明中所述之實施例僅為說明本發明之原理及 功效，而非限制本發明。因此，習於此技術之人士可在 • 不違背本發明之精神對上述實施例進行修改及變化。本 發明之權利範圍如後述之申請專利範圍所列。 1364133 【圖式簡單說明】 苐1圖為本發明天線一實施例結構圖。 第2圖為本發明天線一實施例之返回損失量測結果。 第3圖為本發明天線一實施例於859 MHz之輻射場型圖。 第4圖為本發明天線一實施例於925 MHz之輻射場型圖。 第5圖為本發明天線一實施例於1795MHz之輻射場型圖。 第6圖為本發明天線一實施例於1920MHz之輻射場型圖。 第7圖為本發明天線一實施例於2045 MHz之輻射場型圖。 第8圖為本發明天線一其它實施例結構圖。 【主要元件符號說明】 :本發明天線一實施例 :本發明天線一其它實施例 lj81 :支撐介質 11 ’支樓介質基板之一單一表面 2 :接地面或筆記型電腦液晶螢幕（LCD)之支撐金 屬背板 121 122 13, 83 14, 84 141,841 142, 842 接地面之一側邊邊緣 接地面之短路點 輻射金屬元件 輻射部 轄射部之短路點 第一輻射部 12 1364133 143, 843 :第二輻射部 -144, 844 :第一輻射部與第二輻射部之連接點 15, 85 :饋入部 151,851 :第一饋入部 152, 852 :第一饋入部之饋入點（天線之饋入點） 153, 853 :第二饋入部 154, 854 .第一饋入部與弟二饋入部之特定間距 16 :短路部 •17 :信號源 21 :第一操作頻帶 22 :第二操作頻帶 801 :折彎 (返回損失測結果） (返回損失S„量測結果）In the antenna of the present invention, the radiating portion further includes a first radiating portion and a second radiating portion, each of which resonates in a quarter-wave mode, wherein the first radiating portion excites the second operation of the antenna Band, and the second radiation. The exciter of P is the first-operating frequency band, and the real-impedance value of the first operating band (the quarter-wave resonance mode of the second radiating portion) is reduced by the light-fitting feeding technique, and the first feeding portion is adjusted. And the size of the second feeding portion is effective to increase the capacitance to reduce the inductance of the quarter-wave resonance mode of the second radiating portion of the first operating frequency, so that the quarter-wave resonance The imaginary zero point of the antenna input impedance is additionally added near the frequency point, and the impedance matching is achieved by appropriately adjusting the size of the short-circuit portion, that is, I, so that the radiation portion achieves double resonance in the first operating band. Covers the wireless wide area _ (the two bands of GSM850 / 900 ( 824 ~ 960 MHZ) specified by ww. At the same time 8 1364133 the second operation (4) is inspired by the ith shot - to cover (10) (10) / return s (five) 0 ~ 2I7_z) Three frequencies; [Embodiment] FIG. 1 is a structural diagram of an antenna embodiment of the present invention, comprising: a supporting W-type 11 ground plane 12 having a short-circuit point 122, and the short-circuit point 122 is located at a side edge of the ground plane The i2i radiant metal piece 13' is formed by a printing or closing technique on a single surface 1' of the cutting medium and the branching medium n is located at one of the side edges 121 (4) of the grounding surface, extending substantially parallel outwards, comprising: a light-emitting portion 14 comprising a first radiating portion 142 having at least one bend; a second radiating portion 143 having at least one bend and connected to the first radiating portion 142; a feeding portion 15, comprising The first-feeder portion (5) has a feed point 152 which is a feed point of the antenna and is connected to a signal source 17; a second feed portion 153 whose one end is connected to the radiation portion 14. The second feeding portion 153 and the first feeding portion ΐ5ι have a specific spacing 154; and the shorting portion 16 is electrically connected to the radiating portion 14 and electrically connected to the grounding surface at the other end. Point 122. '' Fig. 2 is the experimental result of the return loss of the antenna embodiment j of the present invention; in the first embodiment, 'considering the built-in ground plane environment of the notebook computer LCD screen, we select the length of the ground plane 12 to be about 26 〇mm, width is about 200mm; and the radiating metal element 13 has a length of about 59 mm, a width of about 11 mm, and a thickness of about 0.8 mm, including: a ninth 1 364 133 a radiating portion 142 having a length of about 31 mm ( Approximately one quarter wavelength of 1900 MHz), a width of approximately 2.5 mm; - a long production of the second radiating portion 143 of approximately 94 mm (approximately one quarter wavelength of 900 MHz) and a width of approximately 2.5 mm; The inlet portion 15 includes: a length of a first feeding portion 151; a length of about 18 mm and a width of about 1〇1111; a length of the second feeding portion 153 of about 21 mm and a width of about 1 mm, the second feeding portion 153 and A specific spacing 154 between the feed portions 151 is about 〇3_'. The short portion 16 has a length of about 6 _ and a width of about mm3 mm. The experimental result is obtained under the definition of 6 dB return loss. An operating band u has an operating bandwidth of about 158 802 (802 to 960 MHz), which is enough to cover a wireless wide area network. (WWAN) GSM850/900 band; and the second operating band 22 has an operating bandwidth of about 533MHz (1708~2241 MHz), which can cover three bands of DCS, PCS and UMTS, and also meets multiple /. Further, the specific pitch is as wide as about 3 mm, and the relevant size of the transfer portion 15 can also be approximated as shown in Fig. 2. 3, 4, 5, 6, and 7 are two-dimensional radiation pattern diagrams of the antenna embodiment 1 of the present invention at 859, 925, 1795, 192 〇 and 2 〇 45 MHz, respectively. In terms of its antenna benefits, the gain in the first operating band 21 is approximately 〇~1OdBi' in the second operating band with an antenna gain of approximately 0.4 to 2.7 dBi. As a result of the above, the antenna of the present invention can meet the application requirements of actual wireless communication products regardless of the low frequency operation band or the high frequency operation band. 'T... Fig. 8 is a structural view of another embodiment 8 of the antenna of the present invention. Wherein 1364133 causes the radiating portion 14 to thereby reduce the antenna. The embodiment of the present invention conforms to the wireless communication product. The radiating portion 14 has at least one bend 801, and a portion of the interval is substantially perpendicular to the ground plane 12, and the volume "other antenna structure is similar to that of Embodiment 1" can also be achieved with Embodiment 1. Similar results, the use of the demand. The embodiments described in the above description are merely illustrative of the principles and functions of the invention and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the invention is set forth in the appended claims. 1364133 [Simplified description of the drawings] FIG. 1 is a structural diagram of an embodiment of an antenna according to the present invention. Figure 2 is a graph showing the return loss measurement of an embodiment of the antenna of the present invention. Figure 3 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 859 MHz. Figure 4 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 925 MHz. Figure 5 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 1795 MHz. Figure 6 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 1920 MHz. Figure 7 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 2045 MHz. Figure 8 is a structural view of another embodiment of the antenna of the present invention. [Description of main component symbols]: an antenna of the present invention: another embodiment of the antenna of the present invention lj81: supporting medium 11 'one single surface of the branch dielectric substrate 2: grounding surface or support of a notebook computer liquid crystal display (LCD) Metal back plate 121 122 13, 83 14, 84 141, 841 142, 842 One of the grounding faces, the side edge of the grounding surface, the short-circuit point of the radiating metal element, the radiating portion, the short-circuit point of the radiating portion, the first radiating portion 12 1364133 143, 843: the second Radiation section - 144, 844: connection point 15 of the first radiation portion and the second radiation portion: 85: feed portion 151, 851: first feed portion 152, 852: feed point of the first feed portion (feed point of the antenna) 153, 853: second feeding portion 154, 854. specific spacing of the first feeding portion and the second feeding portion: short circuit portion 17: signal source 21: first operating band 22: second operating band 801: bending ( Return loss measurement result) (return loss S „ measurement result)
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