1364134 九、發明說明： 【發明所屬之技術領域】 本發明係為一種内藏式行動通訊天線，特別是一種 平面式可多頻操作的單極槽孔天線，適合應用於腦 850/900/1800/1900/UMTS 多頻之操作。 【先前技術】 無線通訊技術的進步帶動了整體通訊產業的蓬勃發 _展因此所衍生出的通訊產品越來越多樣化，相關的應 用也越來越廣泛，而在筆記型電腦上的應用除了 一般傳 ' 統的無線區域網路（WLAN)之外，新一代的筆記型電腦 -更加入了全球微波存取（WiMAX)、數位電視（dtv)以及 行動通訊等通訊應用。然而近年來由於行動通訊系統的 快速演進，使得目前新一代的行動通訊裝置不再只是傳 統的雙頻（GSM900/1800)頻段而已’而是朝向能包含五頻 # (GSM850/900/180〇/i9〇〇/umts)等多頻段的系統來作設計， 因此多頻段的天線便成為一項必要設計。台灣專利公告 號第1254,493號“一種雙頻倒ρ形天線”，所揭示一種利 用筆記型電腦液晶螢幕支標背板來當作其系統接地面， 並於此糸統接地面上設計一倒F形天線的例子，但是上 述的天線只能包含傳統的GSM900/1800頻段而已，並無法 涵蓋目前行動通訊的五頻操作頻段（GSM85〇/9〇〇/18〇〇/ 1900/UMTS)。然而若是使用舊有的設計技術來達成多頻 操作以及增加其操作頻寬時，會發現天線的尺寸過大， 6 1364134 而不易内藏於行動通訊產品中。為了解決此一問題，我 們提出了一種創新的平面式設計，可縮小天線尺寸並能 内藏於行動通訊產品中，特別是筆記型電腦裝置中，且 可涵蓋目前行動通訊系統GSM850 (824〜894 MHz)、 GSM90〇(890〜96〇MHz)、GSM1800(1710〜1880MHz)、 GSM1900 (l85(M990 mhz)及 umts (192〇〜217〇 mhz)之通訊 頻帶的需求。1364134 IX. Description of the invention: [Technical field of the invention] The present invention is a built-in mobile communication antenna, in particular, a planar multi-frequency operated monopole slot antenna suitable for use in brain 850/900/1800 /1900/UMTS multi-frequency operation. [Prior Art] The advancement of wireless communication technology has driven the booming of the overall communication industry. Therefore, the communication products derived from it have become more and more diverse, and related applications have become more and more extensive, and applications on notebook computers have been In addition to the general wireless local area network (WLAN), a new generation of notebook computers - has joined the global microwave access (WiMAX), digital television (dtv) and mobile communications applications. However, due to the rapid evolution of mobile communication systems in recent years, the current generation of mobile communication devices is no longer just the traditional dual-band (GSM900/1800) frequency band but has been oriented to include five-frequency # (GSM850/900/180〇/ Multi-band systems such as i9〇〇/umts) are designed, so multi-band antennas become a necessary design. Taiwan Patent Publication No. 1254, 493 "a dual-frequency inverted ρ-shaped antenna" discloses a notebook computer LCD screen backplane as its system ground plane, and is designed on the system ground plane. An example of an inverted F antenna, but the above antenna can only contain the traditional GSM900/1800 frequency band, and cannot cover the five-frequency operating frequency band of the current mobile communication (GSM85〇/9〇〇/18〇〇/ 1900/UMTS). However, if you use the old design techniques to achieve multi-frequency operation and increase the operating bandwidth, you will find that the antenna size is too large, 6 1364134 and not easy to be embedded in mobile communication products. In order to solve this problem, we have proposed an innovative flat design that can reduce the size of the antenna and can be embedded in mobile communication products, especially in notebook computers, and can cover the current mobile communication system GSM850 (824~894). Requirements for the communication bands of MHz), GSM90〇 (890~96〇MHz), GSM1800 (1710~1880MHz), GSM1900 (l85(M990 mhz) and umts (192〇~217〇mhz).
【發明内容】 如上所述，本發明的目的在於提供一種可内藏於行 動通訊設備中且多頻段操作的行動通訊裝置天線，其不 僅可以涵蓋GSM85〇/90〇/18〇〇/19〇〇/UMTS頻帶之多頻操作之 外，且結構簡單，易於印刷或蝕刻在介質基板上，同時 也達到天線體積縮小化之功效，相當適合應用於筆記型 電腦等行動裝置中。SUMMARY OF THE INVENTION As described above, it is an object of the present invention to provide a mobile communication device antenna that can be embedded in a mobile communication device and operates in multiple frequency bands, which can cover not only GSM85〇/90〇/18〇〇/19〇〇 In addition to the multi-frequency operation of the /UMTS band, the structure is simple, easy to print or etch on the dielectric substrate, and also achieves the effect of reducing the size of the antenna, which is quite suitable for use in mobile devices such as notebook computers.
本發明天線包括：一接地面、一介質基板、一輻射 部及一饋入部。該介質基板連接於該接地面之該上方邊 緣並I?外延伸’且具有一第一表面及一相對於該第一表 面’且該第—表面為—金屬表面並電氣連接 至該接地面之該上方邊緣’其中該金屬表面可由印刷或 蝕刻技術形成於該介質基板上；該輻射部位於該介質基 板之該第-表面上，其包含一較短之第一單極槽孔及二 較長之第二單極槽孔’其中該較短之第—單極槽孔，大 7 1364134 面之該上方邊緣’而該較長之第二單極 二LP; 步階式形狀，其開口方向與該第-單極 :;第=反，分別位於該介編之兩側邊，且 2一早極槽孔之終端區段與該第—單極槽孔之終端區 又大致互相平行；該饋入部’位於該介質基板之該第二 2’Ϊ包含一第-金屬臂’跨過該較長之第二單極； …弟二金屬臂，跨過該較短之第一單極槽孔，且， 臂之—端電氣連接至該第—金屬臂，使該饋二 =致為-T形’又該第二金屬臂之另—端為天線之饋 在本項發明中，我們利用第—金屬臂來激發該較長 、、第：早極槽孔並有效地共振出一接近天線低頻頻帶中 頻率之四分之一波長的第一共振模態以及該第—丑振 =之倍頻的第三共振模態，而利用第二金屬臂來：發 之弟—單極槽孔可有效地共振出—接近天線高頻頻 :::頻率之四分之一波長的第二共振模態，因此藉由 適虽地調整第-單極槽孔及第二單極槽孔的尺寸可以使 天線的低頻頻帶涵蓋GSM850/900之操作，而天線的高頻 =蓋咖動麵職作，…線之多頻或五 8 1364134 【實施方式】 >考第1圖，為本發明天線實施例1之結構圖，包 括··一接地面或筆記型電腦液晶螢幕之支撐金屬背板1〇 接地面之上方邊緣101 ，一接地面之下方邊緣 ，；丨貝基板11，連接於該接地面之上方邊緣101並朝 卜^伸並具有一第一表面111及一相對於該第一表面 。。第一表面，且該第一表面為一金屬表面並經由電 器連接點113電氣連接至該接地面之上方邊緣ι〇ι，·一 輻射部12，位於該介質基板丨！之該第一表面ui上，至 少包含-較短之第-單極槽孔13 ’其大致平行於該接地 面之上方邊緣101以及一較長之第二單極槽孔14，其大 為乂卩白式形狀，且第一單極槽孔之開口 Μ〗方向與 該第一單極槽孔之開σ 131方向相反，分別位於該介質 -土板11之兩側邊，且έ亥第二單極槽孔之終端區段⑷與 該第一單極槽孔之終端區段132大致互相平行；一饋二 部15,位於該介質基板！〗之該第二表面ιΐ2 ，苴包=一 第-金屬臂⑸，並跨過該較長之第二單極槽孔14以及 -第二金屬臂152 ’跨過該較短之第一單極槽孔13，且 遠第二金屬臂152之一端電氣連接至該第一金屬臂⑸ ，使該饋入部15大致為一 Τ形’又該第二金屬臂152之 另一端為天線之饋入點16。 曰、第2圖為本發明天線實施例I的返回損失實驗 1測結果圖。在實施例1中，我們選擇介質基板η為一 1364134 •厚度為0.8mm之玻纖介質基板；在接地面方面由於考慮 到實際筆記型電腦液晶螢幕之支撐金屬背板的系統接地 面環境，因此選擇該接地面10之長度約為26〇 mm、寬度 約為200mm ;而該輻射部12，包含：一較短之第一單極 槽孔13其長度約為61 mm，寬度約為4 mm，一較長之第 二單極槽孔14其長度約為30 mm，寬度約為2 mm，且該 輻射部12係以印刷或蝕刻技術形成於一長度約為75 mm I 、寬度約為10 mm及厚度約為〇 8 mm之介質基板η上； 該第一金屬臂151長度約為31 mm ，寬度約為1 mm，該 第二金屬臂152長度約為5 mm，寬度約為1 mm ;其中第 一單極槽孔13在低頻頻帶激發一個四分之一波長的第一 共振模態21 ’並於高頻頻帶激發一個倍頻的第三共振模 怨23，而該第二單極槽孔14可於高頻頻帶激發一個四分 之一波長的第二共振模態22。由實驗結果，在6 dB返回 損失的定義下’該第一共振模態21足以涵蓋GSM850 φ (824-謂 MHz)及 GSM9〇〇 (89〇_96〇 MHz)頻帶’而該第二共 振模態22及第三共振模態23足以涵蓋GSM1800 (1710-1880 MHz)、GSM1900 (1850-1990 MHz)及 UMTS (1920-2170 MHz)所 需之頻帶需求。 參考第3圖為實施例1於天線之第一共振模態21之 增益與輻射效率圖。由所得之結果，在第一共振模態21 内其天線增益31大致介於2.3 dBi至3.8 dBi之間，而輻射 效率32則大致介於65%至80%之間。 .—參考第4圖為實施例1於天線之第二共振模態22及 第二共振模態23之增益與輻射效率圖。由所得之結果， 在第一共振模態22與第三共振模態23内其天線增益41大 致於2.6 dBi至4.9 dBi之間，而輪射效率42則大致介於 61%至92%之間。以上說明該天線之輕射特性是適合於 行動通訊裝置之應用需求。 第5圖、第6圖及第7圖分別為本發明天線第一其 •它實施例5、第二其它實施例6及第三其它實施例7之 構3貝施例5之έ玄弟一單極槽孔53，具有一彎折且 大致2成一步階式形狀，其他天線結構與實施例丨相似 而貝轭例6之介質基板61具有一彎折，使該介質基板 61之邛刀區間大致垂直於該接地面，其它結構與實施例 1相同。而實施例7之第一金屬臂751具有一彎折且大 致形成一英文字母L形狀，其它結構與實施例丨相同。 上述三個其它實施例5、6、7均可以達成與實施例】 相似之多頻操作特性。 以上δ兑明中所述之實施例僅為說明本發明之原理及 力效而非限制本發明。因此，習於此技術之人士可在 不違月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。 1364134 【圖式簡單說明】 第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實驗量測结果。 第3圖為本發明天線一實施例於天線低頻頻帶之增益與輻 射效率圖。 曰| 第4圖為本發明天線一實施例於天線高頻頻帶之择二 射效率圖。 g |與輕 第5圖為本發明天線第一其它實施例結構圖。 第ό圖為本發明天線第二其它實施例結構圖。 第7圖為本發明天線第三其它實施例結構圖。 【主要元件符號說明】 :本發明天線一實施例 5 6 7 10 101 102 11,61 112,612 113 12, 52 本發明天線第一其它實施例 本發明天線第二其它實施例 本發明天線第三其它實施例 接地面或筆記型電腦液晶螢幕之支撐金屬背板 接地面之上方邊緣 接地面之下方邊緣 介質基板 第一表面 第二表面 電氣連接點 輻射部 12 1364134 13, 53 :第一單極槽孔 131,531 :第一單極槽孔之開口 132, 532 :第一單極槽孔之終端 14 :第二單極槽孔 141 :第二單極槽孔之開口 142 :第二單極槽孔之終端 15, 75 :饋入部 151,751 :第一金屬臂 152 :第二金屬臂 16 :天線饋入點 21 :第一共振模態 22 :第二共振模態 23 :第三共振模態 31,41 :天線增益 32, 42 :天線輻射效率 60 :彎折線 13The antenna of the present invention comprises: a ground plane, a dielectric substrate, a radiating portion and a feed portion. The dielectric substrate is coupled to the upper edge of the ground plane and extends outwardly and has a first surface and a first surface and the first surface is a metal surface and is electrically connected to the ground surface The upper edge ′ wherein the metal surface is formed on the dielectric substrate by a printing or etching technique; the radiation portion is located on the first surface of the dielectric substrate, and includes a shorter first monopole slot and two longer a second monopole slot 'where the shorter first-monopole slot, the upper edge of the large 7 1364134 plane' and the longer second monopole two LP; stepped shape with an opening direction and The first-pole: the first-and-reverse, respectively located on both sides of the media, and the terminal section of the second-earth slot and the terminal zone of the first-pole slot are substantially parallel to each other; 'The second 2'' of the dielectric substrate includes a first metal arm 'crossing the longer second monopole; the second metal arm spans the shorter first monopole slot, and , the arm-end is electrically connected to the first-metal arm, so that the feed two = is -T-shaped The other end of the two metal arms is fed by the antenna. In the present invention, we use the first metal arm to excite the longer, first: early pole slot and effectively resonate a frequency close to the low frequency band of the antenna. Dividing the first resonant mode of one wavelength and the third resonant mode of the multiplier of the first ugly vibration, and using the second metal arm: the younger brother - the monopole slot can effectively resonate - close The antenna has a high frequency::: a second resonance mode of a quarter wavelength of the frequency, so that the low frequency band of the antenna can be covered by the GSM850 by appropriately adjusting the size of the first monopole slot and the second monopole slot. /900 operation, and the high frequency of the antenna = cover the mobile surface, ... multi-frequency or five 8 1364134 [Embodiment] > test 1 is a structural diagram of the antenna embodiment 1 of the present invention, including · A ground plane or notebook computer LCD screen support metal back panel 1 〇 the upper edge of the ground plane 101, a lower edge of the ground plane, the mussel substrate 11, connected to the upper edge of the ground plane 101 and Extending and having a first surface 111 and a relative to the first surface . . The first surface is a metal surface and is electrically connected to the upper edge of the ground plane via the electrical connection point 113, and a radiation portion 12 is located on the dielectric substrate! The first surface ui includes at least a shorter first-monopole slot 13' which is substantially parallel to the upper edge 101 of the ground plane and a longer second monopole slot 14, which is substantially a white shape, and the opening of the first monopole slot is opposite to the opening σ 131 of the first monopole slot, respectively located on both sides of the medium-soil plate 11, and the second The terminal section (4) of the monopole slot and the terminal section 132 of the first monopole slot are substantially parallel to each other; a feed portion 15 is located on the dielectric substrate! The second surface ι 2 , the = = a first metal arm (5), and spans the longer second monopole slot 14 and the second metal arm 152 ′ across the shorter first unipolar a slot 13 and one end of the far second metal arm 152 is electrically connected to the first metal arm (5) such that the feed portion 15 is substantially a dome shape and the other end of the second metal arm 152 is a feed point of the antenna 16.第, Fig. 2 is a graph showing the results of the return loss experiment of the antenna of the first embodiment of the present invention. In the first embodiment, we select the dielectric substrate η as a 1364134 • glass fiber substrate with a thickness of 0.8 mm; in terms of the ground plane, considering the system ground plane environment of the metal back screen of the actual notebook computer LCD screen, The ground plane 10 is selected to have a length of about 26 mm and a width of about 200 mm. The radiating portion 12 includes: a shorter first monopole slot 13 having a length of about 61 mm and a width of about 4 mm. A longer second monopole slot 14 having a length of about 30 mm and a width of about 2 mm, and the radiating portion 12 is formed by printing or etching techniques to a length of about 75 mm I and a width of about 10 mm. And a dielectric substrate η having a thickness of about 8 mm; the first metal arm 151 has a length of about 31 mm and a width of about 1 mm, and the second metal arm 152 has a length of about 5 mm and a width of about 1 mm; The first monopole slot 13 excites a quarter-wavelength first resonant mode 21' in the low frequency band and excites a multiplied third resonant mode 23 in the high frequency band, and the second monopole slot 14 may excite a quarter-wavelength second resonant mode 22 in the high frequency band. From the experimental results, under the definition of 6 dB return loss, the first resonant mode 21 is sufficient to cover the GSM850 φ (824--MHz) and GSM9〇〇 (89〇_96〇MHz) bands and the second resonant mode State 22 and third resonant mode 23 are sufficient to cover the band requirements required for GSM1800 (1710-1880 MHz), GSM1900 (1850-1990 MHz), and UMTS (1920-2170 MHz). Reference Fig. 3 is a graph showing the gain and radiation efficiency of the first resonant mode 21 of the antenna of the first embodiment. As a result, the antenna gain 31 is approximately between 2.3 dBi and 3.8 dBi in the first resonant mode 21, and the radiation efficiency 32 is approximately between 65% and 80%. - Figure 4 is a graph showing the gain and radiation efficiency of the second resonant mode 22 and the second resonant mode 23 of the antenna of the first embodiment. As a result of the result, the antenna gain 41 is approximately between 2.6 dBi and 4.9 dBi in the first resonant mode 22 and the third resonant mode 23, and the rounding efficiency 42 is approximately between 61% and 92%. . The light-emitting characteristics of the antenna described above are suitable for the application requirements of the mobile communication device. 5, 6 and 7 are the first antenna of the present invention, the fifth embodiment, the second embodiment 6 and the third embodiment 7 of the third embodiment. The monopole slot 53 has a bent and substantially two-step shape. The other antenna structure is similar to the embodiment 而, and the dielectric substrate 61 of the yoke example 6 has a bend, so that the boring section of the dielectric substrate 61 The structure is substantially perpendicular to the ground plane, and the other structure is the same as that of the first embodiment. On the other hand, the first metal arm 751 of the embodiment 7 has a bent shape and substantially forms an English letter L shape, and other structures are the same as those of the embodiment. The above three other embodiments 5, 6, and 7 can achieve multi-frequency operation characteristics similar to those of the embodiment. The embodiments described above are merely illustrative of the principles and effects of the invention and are not limiting of the invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit of the invention. The scope of the invention is set forth in the appended claims. 1364134 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing an embodiment of an antenna according to the present invention. Fig. 2 is a result of experimental measurement of return loss of an embodiment of the antenna of the present invention. Figure 3 is a graph showing the gain and radiation efficiency of an antenna in an embodiment of the antenna in the low frequency band of the antenna.曰| Fig. 4 is a diagram showing the selectivity of the antenna in the high frequency band of the antenna according to an embodiment of the present invention. g | light Fig. 5 is a structural view of the first other embodiment of the antenna of the present invention. The figure is a structural view of a second other embodiment of the antenna of the present invention. Figure 7 is a structural view showing a third embodiment of the antenna of the present invention. [Main element symbol description]: antenna of the present invention is an embodiment 5 6 7 10 101 102 11, 61 112, 612 113 12, 52 antenna of the present invention, other embodiments of the antenna, second embodiment of the antenna of the present invention, third embodiment of the antenna of the present invention Example ground plane or notebook computer LCD screen support metal backplane ground plane upper edge ground plane lower edge dielectric substrate first surface second surface electrical connection point radiation part 12 1364134 13, 53 : first monopole slot 131, 531 : opening 132 of the first monopole slot, 532: terminal 14 of the first monopole slot: second monopole slot 141: opening 142 of the second monopole slot: terminal 15 of the second monopole slot , 75 : feed portion 151, 751 : first metal arm 152 : second metal arm 16 : antenna feed point 21 : first resonance mode 22 : second resonance mode 23 : third resonance mode 31 , 41 : antenna gain 32, 42 : Antenna radiation efficiency 60 : Bending line 13