1^43674 九、發明說明： 【發明所屬之技術領域】 特別是一種具 本發明係關於一種行動通訊裝置天線 有耦合式饋入之行動通訊裝置天線。 【先前技術】1^43674 IX. Description of the Invention: [Technical Field of the Invention] In particular, the present invention relates to a mobile communication device antenna having a coupled feed for a mobile communication device antenna. [Prior Art]
技術=訊料㈣展，使得H各樣的無線通訊 ^亩^品不斷的進步與出現，纟中行動通訊裝置的縮小 直都是非常重要的研究課題。在現有的行動通訊裝置 2天線尺寸要達到縮小化的目#，多半利用介質材料的 -u及蜿蜒共振路徑來達成，不過這兩種方法，因天線 所激發的共振模態仍主要為四分之一波長共振，天線體積 的縮小化是有限的，如台灣專利公告號第49〇,884號“雙頻 倒F形平板天線及其輻射金屬片，，，其揭示一種使用=分 之一波長共振之内藏式手機天線即為一例。 .參 為了解決以上的問題，我們提出一種適用於行動通訊 •裝置的耦合式饋入天線設計，涵蓋GSM (890〜960 MHz)、 DCS (1710 〜1880 MHz)、PCS (1850 〜1990 MHz)及 UMTS (1920 〜2170 MHz)之通訊頻帶的需求，而此設計是由一單—天線 達成兩個共振模態的寬頻操作，其中第一共振模態（較低 共振权態）主要是利用辆合式饋入來達成八分之一共振模 態’使得天線的尺寸大幅降低，且天線結構簡單易於印刷 或#刻在介質基板上’使得製作成本低廉，及因佔據手機 内部空間較小’增加了其他元件可運用的空間，故本發明 6 1343674 天線適用於行動通訊裝置的需求。 【發明内容】 如上所述，本發明之目的在於提供一種耦合式饋入行 動通訊裝置天線設計’其不僅可以涵蓋GSM、DCS、pcs 、UMTS冑帶之操作，同時也達到縮小化之功效，因此本 發明天線相當適合應用於行動通訊裝置中。 本發明天線，包含：一電路板；一接地面，位於該電 >路板之-表面上，具有一短路點，且該短路點位於該接地 面之邊緣，一輻射金屬部，係由一單一金屬月沖壓或切 割而成，亦可以使用印刷絲刻技術形成於該電路板上， 該輻射金屬部並具有一短路點，靠近該接地面之一邊緣附 近卜短路金屬部，係由一單一金屬片沖麼或切割而成， 亦可以使用印刷或餘刻技術形成於該電路板上，並 氣連接至軸射金屬部之短路點，另—端電氣連接至該接 .地面之短路點，—饋人金屬部，係由印刷或㈣技術形成 於5亥電路板上，包含：一第一饋入金屬部，位於該電路板 ::表面上’且具有一饋入點；-第二饋入金屬部，位於 該電路板與該第—饋人金屬部相對應之另—表面上，且盆 輻射金屬部；及一饋入信號源，位於該饋入 點與該接地面之間。 m2項發明天線中，我們使㈣合式饋人來降低第― 入金;八刀之—共振模態）的實部阻抗值，並調整饋 金屬权尺寸來有效地增加電容性，崎低第—共振模 7 1343674 態（八分之一波長共振模態）之電感性，使得八分之一波 長共振頻率點附近額外增加了天線輸入阻抗之虛部零點， 再藉由適當地調整該短路金屬部的尺寸，即可達到良好的 ; 阻抗匹配，使得該輻射金屬部激發第一共振模態（八分之 *.· 波長共振模態）以及第二共振模態（四分之一波長共振 模態），其中，第一共振模態為一較低操作頻帶，可以涵 .蓋無線廣域網路（WWAN)所需之全球行動通訊系統 890〜960MHz)之頻帶，而第二共振模態可以涵蓋數位通訊 系統（DCS，1710〜1880 MHz)、個人通訊服務系統（pcs，185〇〜 1990 MHz)及第三代行動通訊（UMTS，192〇〜217〇 mhz)之三個 頻帶。 【實施方式】 第1圖為本發明天線之一實施例結構圖，包含：一電 修路板11 ; 一接地面12,位於該電路板n之一表面上，具有 一短路點121 ，且該短路點121位於該接地面12之一邊緣 120 ; -輻射金屬部13，係由一單一金屬片沖壓或切割而 成，亦可以使用印刷或蝕刻技術形成於該電路板^上，該 輻射金屬部13並具有一短路點132 ,靠近該接地面12之一 邊緣120附近；一短路金屬部14，係由一單一金屬片沖壓 或切割而成’亦可以使用印刷或姓刻技術形成於該電路板 11上，其一端電氣連接至該輻射金屬部13之短路點132， 另一端電氣連接至该接地面12之短路點121 ; 一饋入金屬 8 1343674 邛15，係由印刷或蝕刻技術形成於該電路板11上，包含： 一第一饋人金屬部⑸，位於該電路板11之—表面上且 具#饋入點152 ; -第二饋入金屬部153，位於該電路 )板U與該第一饋入金屬部⑸相對應之另一表面上且其 λ.—端連接至贿射金屬部13 ;及—饋人㈣㈣，位於該 •.饋入點152與該接地面12之間。 第圖為本發明天線之實施例1的返回損失量測結果 • 在實把例1中選擇下列尺寸進行量測：電路板11長度約 為116mm、寬度約為6〇mm ;接地面12長度約為議_ ' 寬度約為6〇聰；輕射金屬部13長度約為43mm(約為900 之八分之一波長）、寬度約為1 mm ;短路金屬部14長 度約為21 mm、寬度約為丨mm :饋入金屬部15，包含：一 第々饋入金屬部151長度約為1〇_，寬度約為〇5·; -第二饋入金屬部153長度約為9mm、寬度約為2_。由 所得實驗結果，在6dB^^失的定義下，其第—共振模 ._態21足以涵蓋無線廣域網路（WWAN)之GSM頻帶，而第二 、·共振模態22涵蓋DCS、PCS及UMTS之三個頻帶。 第3圖、第4圖、第5圖及第6圖為本發明天線一實 施例分別於925 、1795、1920及2045MHz之輻射場型圖， 其天線增益分別為0.19、1.65、1.9〇及2.65dBi。由所得之 結果，本發明天線無論低頻操作頻帶或高頻操作頻帶皆能 符合行動通訊產品的使用需求。 9 1343674 第7圖為本發明天線之第一其他實施例7結_，包 含.-電路板H，· -接地面12，位於該電路板之一表面上 ，具有-短路點121，且該短路點⑵位於該接地面之一 邊緣；一介質基板70，位於該接地面12之一邊緣12〇處， 且大致垂直於該電路板U ; 一輻射金屬部73，係由印刷或 •蝕刻技術形成於該介質基板7〇上，且具有一短路點乃2 ;Technology = Communication (4) exhibition, making H-like wireless communication ^ Mu products continue to progress and appear, the reduction of mobile communication devices in Suizhong is a very important research topic. In the existing mobile communication device 2 antenna size to achieve the reduction of the size #, mostly using the -u and 蜿蜒 resonance path of the dielectric material to achieve, but the two methods, the resonant mode excited by the antenna is still mainly four One-wavelength resonance, the reduction of the antenna volume is limited, such as Taiwan Patent Publication No. 49, 884 "Double-frequency inverted F-shaped panel antenna and its radiating metal sheet, which reveals one use = one of the points The built-in mobile phone antenna with wavelength resonance is an example. In order to solve the above problems, we propose a coupled feed antenna design suitable for mobile communication devices, covering GSM (890~960 MHz), DCS (1710 ~ 1880 MHz), PCS (1850 to 1990 MHz) and UMTS (1920 to 2170 MHz) communication band requirements, and this design is a single-antenna to achieve two resonant modes of broadband operation, the first resonant mode (Lower resonance weight state) is mainly to achieve one-eighth resonance mode by using the combined feed-in 'so that the size of the antenna is greatly reduced, and the antenna structure is simple and easy to print or #刻刻在媒体基板的' The low cost and the small internal space of the mobile phone increase the space available for other components, so the antenna of the present invention is suitable for use in a mobile communication device. [Invention] As described above, the object of the present invention is to provide The antenna design of the coupled feed mobile communication device can not only cover the operation of GSM, DCS, pcs, UMTS, but also achieve the effect of downsizing, so the antenna of the invention is quite suitable for application in a mobile communication device. The antenna comprises: a circuit board; a ground plane on the surface of the electric circuit board, having a short circuit point, wherein the short circuit point is located at an edge of the ground plane, and a radiating metal portion is formed by a single metal Stamped or cut into a month, can also be formed on the circuit board by using a printing wire engraving technique. The radiant metal portion has a short-circuit point, and near the edge of one of the grounding surfaces, the short-circuited metal portion is formed by a single metal piece. Can be punched or cut, can also be formed on the circuit board by printing or engraving technology, and connected to the short circuit of the axial metal part Point, the other end is electrically connected to the grounding point of the grounding surface, the feeding metal part is formed by the printing or (4) technology on the 5H circuit board, and comprises: a first feeding metal part located on the circuit board :: on the surface 'and having a feed point; - a second feed metal portion on the other surface of the circuit board corresponding to the first donor metal portion, and the basin radiates the metal portion; and a feed The signal source is located between the feed point and the ground plane. In the antenna of the invention of m2, we make the (four) combined feed to reduce the real impedance value of the first-input gold; the eight-knife-resonance mode, and adjust the feed. The metal weight size effectively increases the capacitance, and the inductance of the first-resonance mode 7 1343674 state (eight-wavelength resonance mode) makes the antenna input impedance increase near the one-eighth wavelength resonance frequency point. The imaginary zero point, and by appropriately adjusting the size of the short-circuited metal portion, good impedance can be achieved; the impedance matching causes the radiating metal portion to excite the first resonant mode (eight-minute*.·wavelength resonance mode) and Second resonance mode (quarter Long resonant mode), wherein the first resonant mode is a lower operating band, which can cover the frequency band of the global mobile communication system (890~960 MHz) required for the wireless wide area network (WWAN), and the second resonant mode It can cover three frequency bands of digital communication system (DCS, 1710~1880 MHz), personal communication service system (pcs, 185〇~1990 MHz) and third generation mobile communication (UMTS, 192〇~217〇mhz). [Embodiment] FIG. 1 is a structural diagram of an embodiment of an antenna according to the present invention, comprising: an electric circuit board 11; a ground plane 12 on a surface of the circuit board n having a short-circuit point 121, and The short-circuit point 121 is located at one edge 120 of the ground plane 12; the radiating metal portion 13 is formed by stamping or cutting a single metal sheet, and may also be formed on the circuit board by using a printing or etching technique. 13 has a short-circuit point 132 near the edge 120 of one of the ground planes 12; a short-circuited metal portion 14 is stamped or cut from a single piece of metal 'can also be formed on the board using printing or surname techniques 11 , one end of which is electrically connected to the short-circuit point 132 of the radiating metal portion 13 , the other end is electrically connected to the short-circuit point 121 of the ground plane 12 ; a feed metal 8 1343674 邛 15 is formed by printing or etching technology The circuit board 11 includes: a first donor metal portion (5) on the surface of the circuit board 11 and having a #feed point 152; a second feed metal portion 153 located on the circuit board U and the The first feeding metal portion (5) corresponds to Λ.- on a surface thereof and connected to the end portion 13 bribe emitting metal; and - feeding human ㈣㈣, • which is located between the feed point 152 and the ground plane 12. The figure shows the return loss measurement result of the embodiment 1 of the antenna of the present invention. • The following dimensions are selected for measurement in Example 1: the length of the circuit board 11 is about 116 mm and the width is about 6 mm; the length of the ground plane 12 is about The width of the metal portion 13 is about 43 mm (about one-eighth of a wavelength of 900) and the width is about 1 mm. The length of the short-circuited metal portion 14 is about 21 mm and the width is about _.丨mm: feeding metal portion 15, comprising: a second feed metal portion 151 having a length of about 1 〇 _ and a width of about 〇 5 ·; - the second feed metal portion 153 having a length of about 9 mm and a width of about 2_. From the experimental results obtained, under the definition of 6dB^^, its first-resonant mode._state 21 is sufficient to cover the GSM band of the wireless wide area network (WWAN), and the second, resonant mode 22 covers DCS, PCS and UMTS. The three frequency bands. 3, 4, 5, and 6 are radiation pattern diagrams of the antennas of the present invention at 925, 1795, 1920, and 2045 MHz, respectively, and the antenna gains are 0.19, 1.65, 1.9, and 2.65, respectively. dBi. As a result of the above, the antenna of the present invention can meet the use requirements of mobile communication products regardless of the low frequency operation band or the high frequency operation band. 9 1343674 Figure 7 is a first embodiment of the antenna of the present invention, comprising a circuit board H, a ground plane 12, on one surface of the circuit board, having a short circuit point 121, and the short circuit Point (2) is located at one edge of the ground plane; a dielectric substrate 70 is located at one edge 12〇 of the ground plane 12 and is substantially perpendicular to the circuit board U; a radiating metal portion 73 is formed by printing or etching techniques On the dielectric substrate 7〇, and has a short circuit point of 2;
_ -一短路金屬部74，係由印刷❹刻技術形成於該介質基板 70上，其一端電氣連接至該輻射金屬部乃之短路點乃2， 另一端電氣連接至該接地面12之短路點121 ; 一饋入金屬 ^ ^ 5 第一饋入金屬部751 ，位於該介質基板70 之一表面上，且具有一饋入點752 ; 一第二饋入金屬部 753位於該介質基板7〇與該第一饋入金屬部乃1相對應 之另一表面上，且其一端連接至該輻射金屬部乃；及一饋 入信號源16 ’位於該饋入點752與該接地面12之間。實施 例7亦能獲得與實施例丨近似的結果，符合行動通訊產品 的使用需求。 ▲第8圖為本發明天線之第二其他實施例8結構圖，其 中该介質基板80具有-次以上之折彎8〇18()2，可以藉此縮 小天，之體積，其他天線結構與實施例丨及7相似。本發 明之實施例8亦能獲得與實施例！近似的結果，符合行動 通訊產品的使用需求。 以上說明中所述之實施例僅為說明本發明之原理及其 功效，而非限制本發明。因此，習於此技術之人士可再不 1343674 違背本發明之精神對上述實施例進行修改及變化。本發明 之權利範圍應如後述之申請專利範圍所列。 1343674 【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量測結果。 第3圖為本發明天線一實施例於925 MHz之輻射場型圖。 第4圖為本發明天線一實施例於1795 MHz之輻射場型圖。 第5圖為本發明天線一實施例於1920 MHz之輻射場型圖。 第6圖為本發明天線一實施例於2045 MHz之輻射場型圖。 第7圖為本發明天線之第一其他實施例結構圖。 第8圖為本發明天線之第二其他實施例結構圖。 【主要元件符號說明】 7 8 11 12 ，參 120 121 13,73,83 131,731,831 132, 732, 832 14, 74, 84 15, 75, 85 151,751,851 本發明天線一實施例 本發明天線之第一其他實施例 本發明天線之第二其他實施例 系統電路板 接地面 接地面之一邊緣 接地面之短路點 輻射金屬部 輻射金屬部之起始端 乾射金屬部之短路點 短路金屬部 饋入金屬部 第一饋入金屬部 12 1343674 152, 752, 852 饋入點 153,753, 853 第二饋入金屬部 16 饋入信號源 21 :第一共振模態 22 :第二共振模態 70,80 :介質基板 801,802 =折彎 13a short-circuited metal portion 74 formed on the dielectric substrate 70 by a printing engraving technique, one end of which is electrically connected to the radiating metal portion, wherein the short-circuit point is 2, and the other end is electrically connected to the short-circuit point of the ground plane 12. a first feeding metal portion 751 is located on a surface of the dielectric substrate 70 and has a feeding point 752; a second feeding metal portion 753 is located on the dielectric substrate 7 The first feeding metal portion is on the other surface of the corresponding one, and one end thereof is connected to the radiating metal portion; and a feeding signal source 16' is located between the feeding point 752 and the grounding surface 12. Embodiment 7 can also obtain results similar to those of the embodiment, in accordance with the use requirements of the mobile communication product. ▲ Figure 8 is a structural view of a second embodiment 8 of the antenna of the present invention, wherein the dielectric substrate 80 has a bend of 8 〇 18 () 2 or more, thereby reducing the volume of the sky, other antenna structures and The examples are similar to 7. Embodiment 8 of the present invention can also be obtained and implemented! Approximate results are consistent with the use of mobile communications products. The embodiments described in the above description are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the invention. Therefore, those skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the invention. The scope of the invention should be as set forth in the appended claims. 1343674 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing 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 925 MHz. Figure 4 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 1795 MHz. Figure 5 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 1920 MHz. Figure 6 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 2045 MHz. Figure 7 is a structural view of a first other embodiment of the antenna of the present invention. Figure 8 is a structural view of a second other embodiment of the antenna of the present invention. [Description of main component symbols] 7 8 11 12 , Ref. 120 121 13, 73, 83 131, 731, 831 132, 732, 832 14, 74, 84 15, 75, 85 151, 751, 851 An antenna of the present invention is the first other implementation of the antenna of the present invention. Example of the second embodiment of the antenna of the present invention, the circuit board grounding surface, one of the grounding surfaces, the short-circuit point of the edge grounding surface, the short-circuit point of the starting end of the radiating metal portion, the short-circuit point of the dry-emitting metal portion, the short-circuited metal portion, the feeding portion of the metal portion, the first feed Into the metal part 12 1343674 152, 752, 852 feed point 153, 753, 853 second feed metal part 16 feed signal source 21: first resonance mode 22: second resonance mode 70, 80: dielectric substrate 801, 802 = fold Bend 13