200952264 - 九、發明說明： 【發明所屬之技術領域】 本發明係為一種多頻行動通訊裝置天線，特別是一種 使用共面耦合式饋入之行動通訊裝置天線，適合應用於 GSM850/900/1800/1900/UMTS 多頻之操作。 【先前技術】 由於無線通訊科技快速蓬勃發展，所衍生的無線通訊 秦技術以及產品也越來越多樣化。目前傳統手機天線多半以 倒F形天線或單極天線為主要設計類型，而此類天線所激 發的最低共振模態主要為四分之一波長共振模態。加上天 線特別於低頻900 MHz時需要較長的有效輻射共振路徑， 因此多半會將天線韓射共振路徑使用婉誕或是多次彎折之 設計方式來降低天線佔據之空間，使得天線能夠内藏於行 動通訊裝置之内部。如台灣專利公告號第1245,451號“倒F 型天線”，其主要揭示一種使用四分之一波長共振之内藏 ❹式手機天線即為一例。但是使用蜿蜒或多次彎折等設計技 巧相對的會造成天線的操作頻寬縮減，而使得天線並不容 易達成目前無線廣域網路（WWAN, Wireless Wide Area Network) GSM850/900/1800/1900/UMTS五頻頻段之多頻操作。200952264 - IX. Description of the invention: [Technical field of the invention] The present invention is a multi-frequency mobile communication device antenna, in particular, a mobile communication device antenna using a coplanar coupling type, suitable for application to GSM850/900/1800 /1900/UMTS multi-frequency operation. [Prior Art] Due to the rapid development of wireless communication technology, the wireless communication technology and products derived from it have become more and more diverse. At present, most of the traditional mobile phone antennas are mainly inverted F-shaped antennas or monopole antennas, and the lowest resonance mode excited by such antennas is mainly a quarter-wave resonance mode. In addition, the antenna requires a long effective radiated resonance path especially at a low frequency of 900 MHz, so most of the antenna will be used in the design of the antenna or the multiple bends to reduce the space occupied by the antenna, so that the antenna can be inside. Hidden inside the mobile communication device. For example, Taiwan Patent Publication No. 1245, 451 "Inverted F-type Antenna" mainly discloses a built-in 手机 type mobile phone antenna using quarter-wave resonance. However, the design technique of using 蜿蜒 or multiple bends will cause the operation bandwidth of the antenna to be reduced, and the antenna is not easy to reach the current wireless wide area network (WWAN) GSM850/900/1800/1900/ Multi-frequency operation of the UMTS five-frequency band.
在本發明中我們提出一種適用於行動通訊裝置的多頻 天線設計’其天線操作頻寬在低頻頻段可涵蓋GSM850/900 (824〜960 MHz) ’在南頻頻段則可涵蓋GSM18〇〇/19〇〇/UMTS (ΠΗ)〜2Π0ΜΗΖ)之通訊頻帶的^ ’而此天線設計主要以 6 200952264 一創新的共面耦合式饋入技術取代傳統的直接饋入方式， 並經由適當調整使得天線之八分之一波長共振模態（第一 共振模態）可以有效被激發並具有不錯的阻抗匹配，可藉 此降低天線之共振路徑長度，進而使得天線體積能夠有效 縮減。同時本設計天線結構簡單易於使用蝕刻、印刷或射 出成形技術形成於介質基板上，使得製作成本得以降低。 故本發明天線適合應用於行動通訊裝置中。 ❹【發明内容】 如上所述，本發明之目的在於提供一種行動通訊裝置 天線，其不僅可以涵蓋GSM850/900/1800/1900/UMTS多頻頻帶 之操作，同％天線適合内藏於行動通訊裝置内部，因此本 發明天線相當適合應用於手機等行動通訊裝置。 本！X月天 '線’包含.一電路板；一接地面，位於該電 板之表面上，具有一邊緣，且該邊緣位於該電路板内 ❹部丄使該電路板具有—無接地面區間，同時該無接地面區 間靠近該電路板之一邊緣處；及一天線元件，包含·一介 質基板，位於該電路板之無接地面區間之該邊緣處，且大 致垂直該電路板，同時該介質基板全部位於該電路板之同 y側，—輕射金屬部，位於該介質基板之-表面上，其係 以餘刻、印刷或射出成形技術形成於該介質基板上；及— =屬：面位於該介質基板之一表面上，且與該輕射金 ί質韻刻、印刷或射出成形技術形成於該 質土板上’第一金屬元件，其—端電氣連接至 7 200952264 -該輻射金屬部；一第二金眉- 板無接地面區間之’其—端經由位於該電路 該第二金屬元件並與該第 ㈣至訊唬源 距，該特定區間-般需要、兀牛之間具有—特定間 口里，及一短路金屬元件，並— 电奋耦 元件，另—端經由位;^氣接至該第一金屬 金屬連接線短路至該接地面。 路 路金眉诖柏括於、 4之饋入金屬連接線及短 ❽, 、'”以蝕刻或印刷技術形成於該電路板上。 在本項發明天線中，我 降低天線第-共振模態能有效 阻>枯、， 共振杈態）的實部輸入 低ί 5周整饋人金屬部之尺寸來增加電容性，藉此降 態之電感性，使得第—共振模態頻率附近另 外增加了-個輸人阻抗之虛部零點，再調整短路金屬元件 之尺寸使第一共振模態具有良好的阻抗匹配，使其操作 頻寬足以滿足無線廣域網路所規定之gSM85〇/9〇〇 (824〜96〇 © MHz)之兩個頻段。同時利用該輕射金屬部之兩個相近長度 之輻射金屬片有效激發第二共振模態（較長路徑之四分^ 一波長共振模態）及第三共振模態（較短路徑之四分之一 波長共振模態）合成一寬頻頻段涵蓋gsm18〇〇/19〇〇_ts (ΠΙΟ〜2170MHZ)之三個頻段。 【實施方式】 第1圖為本發明天線一實施例1之結構圖，包含：_ 電路板11 ; 一接地面12，位於該電路板η之一表面上，具 8 200952264 有一邊緣121 ’且該邊緣121位於該電路板η内部，使該 電路板11具有一無接地面區間111 ，同時該無接地面區間 111靠近該電路板11之一邊緣處；及及一天線元件13，包 含：一介質基板131 ，位於該電路板η之一無接地面區間 ill之该邊緣處，且大致垂直該電路板11，同時該介質基 板131全部位於該電路板U之同—侧；一輻射金屬部133 ，位於該介質基板之一表面132上，其係以蝕刻、印刷或 ❹ 射出成形技術形成於該介質基板131上；及一饋入金屬部 立134 ’位於該介質基板之—表面132 ι，且與該輕射金屬 部133 @-表®，係以姓刻、印刷或射出成形技術形成於 該介質基板m上，包含：―第—金屬元件135端 電氣連接至該輕射金屬部133; 一第二金屬元件136，立 一端經由位於該電路板^無接地面區間lu之一饋入金屬 ^接線14電氣連接至-訊號源16，該第二金屬元件136並 ^亥第-金屬元们35之間具有一特定間距137 ;及一短 ❹ 路金屬兀件138，其一端電氣連接至該第-金屬元件136 改L端經由位於該電路板11之無接地面區間⑴之-短 路金屬連接線15短路至該接地面12。上述之饋入金屬連接 線14及短路金屬連接線15係 路板u上。 係以餘刻或印刷技術形成於該電 第2圖為本發明天線實施例^ 在實施例！中選擇下列尺寸 相失里I。果 約為1〇7_、寬度置測：電路板11長度 見度、々為4〇_ ;接地面 9 200952264 •、寬度約為40mm ;天線元件13，包含：一介質基板131 長度為38 mm、寬度約為8 mm ; —輻射金屬部133較長共 振路徑約為38mm (約為900 MHz之八分之一波長）、較 短共振路徑約為34 mm且其寬度均約為0.5 mm ; —饋入金 屬部135 ，包含：一第一金屬元件135長度約為10mm、 寬度約為1 mm ; —第二金屬元件136長度約為15 mm、寬 度約為1 mm ;及一短路金屬元件138長度約為12 mm、寬 度約為0.5 mm，該第二金屬元件136並與該第一金屬元件 ❿ 135之間具有一特定間距137約為0.5 mm。由所得實驗結 果，在6dB返回損失的定義下，其第一共振模態21足以涵 蓋GSM850/900兩個通訊頻帶，而第二共振模態22及第三共 振模態23合成一寬頻頻段足以涵蓋GSM1800/1900及UMTS 三個通訊頻帶。 第3圖、第4圖、第5圖、第6圖及第7圖為本發明 天線一實施例1分別於859、925 、1795、1920以及2045 ❿MHz之2維輻射場型圖，而其頻率點下之天線最大增益分 別為 1.03、1·21、3.24、1.79 及3.83dBi。由所得之結果， 本發明天線在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。 第8圖為本發明天線一其他實施例8之結構圖，包含 :一電路板11 ; 一接地面12，位於該電路板11之一表面上 ，具有一邊緣121 ，且該邊緣121位於該電路板11内部， 使該電路板11具有一無接地面區間111 ，同時該無接地面 200952264 ❹ 區間⑴靠近該電路板u之—邊緣處；及及—天線元扣 ’包含：一介質基板83!，位於該電路板u之一無接地面 區間111之該邊緣處’且大致垂直該電路板u，同時該介 質基板83i橫跨該電路板^兩側；一輕射金屬部⑶， 位於該介質基板之-表面132上，其係以#刻、印刷或射 出成形技術形成於該介質基板131上；及一饋入金屬部 834，位於該介質基板之一表面132 i，且與該輕射㈣ 部133同-表面，係以姓刻、印刷或射出成形技術形成於 該介質基板131上，包含：一第一金屬元件835 ,其一端 電氣連接至該輻射金屬部133 ; 一第二金屬元件136，其 一端經由位於該電路板11無接地面區間111之一饋入金屬 連接線84電氣連接至一訊號源16，該第二金屬元件I%並 與該第一金屬元件835之間具有一特定間距137 ;及一短 路金屬元件838 ，其一端電氣連接至該第一金屬元件136In the present invention, we propose a multi-frequency antenna design suitable for mobile communication devices. 'The antenna operation bandwidth can cover GSM850/900 (824~960 MHz) in the low frequency band. 'In the south frequency band, it can cover GSM18〇〇/19. 〇〇/UMTS (ΠΗ)~2Π0ΜΗΖ) The communication band ^' and this antenna design mainly replaces the traditional direct feed mode with an innovative coplanar coupled feed technology of 6 200952264, and makes the antenna eight by appropriate adjustment. The one-wavelength resonance mode (first resonance mode) can be effectively excited and has good impedance matching, thereby reducing the resonance path length of the antenna, thereby enabling the antenna volume to be effectively reduced. At the same time, the antenna structure of the present design is simple and easy to form on the dielectric substrate by etching, printing or injection molding technology, so that the manufacturing cost can be reduced. Therefore, the antenna of the present invention is suitable for use in a mobile communication device. SUMMARY OF THE INVENTION As described above, it is an object of the present invention to provide a mobile communication device antenna that can cover not only the operation of the GSM850/900/1800/1900/UMTS multi-frequency band, but also the % antenna suitable for being embedded in a mobile communication device. Internally, the antenna of the present invention is quite suitable for use in mobile communication devices such as mobile phones. this! X月天 '线' includes a circuit board; a ground plane on the surface of the board has an edge, and the edge is located in the inner portion of the circuit board, so that the circuit board has a - no ground plane interval, At the same time, the ungrounded surface section is adjacent to an edge of the circuit board; and an antenna element includes a dielectric substrate located at the edge of the ungrounded surface of the circuit board and substantially perpendicular to the circuit board, and the medium The substrate is all located on the same y side of the circuit board, and the light metal portion is located on the surface of the dielectric substrate, and is formed on the dielectric substrate by using a engraving, printing or injection molding technique; and — = genus: surface Located on a surface of the dielectric substrate, and formed with the light-emitting gold, rhyme, printing or injection molding technology on the soil plate 'the first metal component, the terminal is electrically connected to 7 200952264 - the radiation metal a second gold eyebrow - the board has no ground plane section of the 'the end of the second metal component located in the circuit and the fourth (fourth) to the source distance, the specific interval - generally required, between the yak - specific mouth And a short-circuiting metal member, and - coupling element electrically excited, the other - through the bit end; ^ gas connected to the first metal connection lines shorted to the metal ground plane. The road is covered with a metal wire and a short cymbal, and the '' is formed by etching or printing technology. In the antenna of the present invention, I lower the antenna first-resonance mode. It can effectively block the real input of the <dry, resonant state.) The size of the metal part of the feed is increased by 5 weeks to increase the capacitance, thereby reducing the inductiveness of the state, causing an increase in the vicinity of the first resonance mode frequency. The imaginary zero point of the input impedance is adjusted, and the size of the short-circuited metal component is adjusted to make the first resonant mode have good impedance matching, so that the operating bandwidth is sufficient to meet the gSM85〇/9〇〇 specified by the wireless wide area network ( Two frequency bands of 824~96〇© MHz). At the same time, two similar radiating metal sheets of the light-emitting metal portion are used to effectively excite the second resonant mode (four-minute wavelength resonance mode of the longer path) and The third resonant mode (the short-wavelength quarter-wave resonant mode) synthesizes a wide frequency band covering three frequency bands of gsm18〇〇/19〇〇_ts (ΠΙΟ~2170MHZ). [Embodiment] FIG. A structural diagram of an embodiment 1 of an antenna according to the present invention The circuit board 11 includes: a ground plane 12 on a surface of the circuit board η having an edge 121 ′ and an edge 121 located inside the circuit board η, so that the circuit board 11 has a groundless surface a section 111, wherein the ungrounded surface section 111 is adjacent to an edge of the circuit board 11; and an antenna element 13 includes: a dielectric substrate 131 at the edge of one of the circuit boards n having no ground plane interval ill And substantially perpendicular to the circuit board 11, while the dielectric substrate 131 is all located on the same side of the circuit board U; a radiating metal portion 133 is located on a surface 132 of the dielectric substrate, which is etched, printed or ejected. A forming technique is formed on the dielectric substrate 131; and a feeding metal portion 134' is located on the surface 132 of the dielectric substrate, and is associated with the light metal portion 133 @-表®, which is printed, printed or ejected. Forming technology is formed on the dielectric substrate m, comprising: a first metal element 135 end electrically connected to the light metal portion 133; a second metal element 136, the vertical end is located in the circuit board ^ no ground plane interval The feed metal wire 14 is electrically connected to the signal source 16, the second metal component 136 has a specific spacing 137 between the metal elements 35, and a short metal 138, one end of which is electrically Connected to the first metal element 136, the L terminal is short-circuited to the ground plane 12 via a short-circuit metal connection line 15 located in the ground-free surface section (1) of the circuit board 11. The above-mentioned feed metal connection line 14 and short-circuit metal connection line 15 series of road boards u. Formed by the engraving or printing technology on the electric second picture is the antenna embodiment of the invention ^ In the embodiment! select the following size phase loss I. The value is about 1〇7_, the width is measured: the length of the circuit board 11 is 々, 々 is 4〇_; the ground plane 9 200952264 •, the width is about 40mm; the antenna element 13, comprising: a dielectric substrate 131 having a length of 38 mm, The width is about 8 mm; the radiating metal portion 133 has a longer resonant path of about 38 mm (about one-eighth of a wavelength of 900 MHz), a shorter resonant path of about 34 mm, and a width of about 0.5 mm. The metal portion 135 includes: a first metal member 135 having a length of about 10 mm and a width of about 1 mm; - a second metal member 136 having a length of about 15 mm and a width of about 1 mm; and a short metal member 138 having a length of about The second metal component 136 has a specific spacing 137 of about 0.5 mm from the first metal component 135 135 of 12 mm and a width of about 0.5 mm. From the experimental results obtained, under the definition of 6dB return loss, the first resonant mode 21 is sufficient to cover the two communication bands of GSM850/900, and the second resonant mode 22 and the third resonant mode 23 are synthesized to cover a wide frequency band. Three communication bands of GSM1800/1900 and UMTS. 3, 4, 5, 6, and 7 are two-dimensional radiation pattern diagrams of an embodiment 1 of the antenna of the present invention at 859, 925, 1795, 1920, and 2045 ❿MHz, respectively, and the frequency thereof. The maximum gain of the antennas under the points is 1.03, 1.21, 3.24, 1.79 and 3.83dBi. As a result of the above, the antenna of the present invention can meet the use requirements of mobile communication products in the low frequency operation band or the high frequency operation band. FIG. 8 is a structural diagram of another embodiment 8 of the antenna of the present invention, comprising: a circuit board 11; a ground plane 12 on a surface of the circuit board 11 having an edge 121, and the edge 121 is located in the circuit Inside the board 11, the circuit board 11 has a groundless surface section 111, and the ungrounded surface 200952264 区间 section (1) is near the edge of the circuit board u; and the antenna element buckle 'includes: a dielectric substrate 83! Located at the edge of one of the circuit board u without the ground plane section 111 and substantially perpendicular to the circuit board u, while the dielectric substrate 83i straddles the two sides of the circuit board; a light metal portion (3) located in the medium The substrate-surface 132 is formed on the dielectric substrate 131 by a patterning, printing or injection molding technique; and a feeding metal portion 834 is located on a surface 132i of the dielectric substrate, and is associated with the light beam (4) The portion 133 is formed on the dielectric substrate 131 by a surname, printing or injection molding technique, and includes: a first metal member 835 having one end electrically connected to the radiation metal portion 133; and a second metal member 136 One end of the bit The circuit board 11 has no grounding area 111 and the feeding metal connection line 84 is electrically connected to a signal source 16. The second metal element 1% has a specific spacing 137 from the first metal element 835; Shorting metal component 838 having one end electrically connected to the first metal component 136
，另一端經由位於該電路板丨丨之無接地面區間lu之一短 路金屬連接線85短路至該接地面12。上述之饋入金屬連接 線84及短路金屬連接線85係以蝕刻或印刷技術形成於該電 路板11上只把例8亦能獲得與實施例1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 違月本發明之精神對上述實施例進行修改及變化。本發明 之權利範圍應如後述之申請專利範圍所列。 11 200952264 •【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曲線。 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925MHz之輻射場型圖。 第5圖為本發明天線一實施例於1795 Μ?之輻射場型圖。 第6圖為本發明天線一實施例於192〇 mjjz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他實施例結構圖。 【主要元件符號說明】 I :本發明天線一實施例 11 111 12 121 ❹ 13,83 131,831 132 133 134.834 135.835 136 137 電路板 電路板之一無接地面區間 接地面 接地面之一邊緣 天線元件 介質基板 介質基板之一表面 輻射金屬部 饋入金屬部 第一金屬元件 第二金屬元件 特定間距 12 200952264 138,838 :短路金屬元件 14, 84 :饋入金屬連接線 15, 85 :短路金屬連接線 16 •訊號源 21 :第一共振模態 22 :第二共振模態 23 :第三共振模態 8 :本發明天線一其他實施例 ❹ 13The other end is short-circuited to the ground plane 12 via a short-circuit metal connection line 85 located in the ungrounded surface section lu of the board. The above-described feed metal connection line 84 and short-circuit metal connection line 85 are formed on the circuit board 11 by etching or printing techniques. Only Example 8 can obtain results similar to those of Embodiment 1, which is in line with the use requirements of the mobile communication product. 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 of the invention. The scope of the invention should be as set forth in the appended claims. 11 200952264 • [Simplified 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 graph showing the return loss experimental measurement of an antenna according to an embodiment 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 。?. Figure 6 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 192 〇 mjjz. Figure 7 is a radiation pattern diagram of an embodiment of the antenna of the present invention at 2045 MHz. Fig. 8 is a structural view showing another embodiment of the antenna of the present invention. [Main component symbol description] I: Antenna of the present invention is an embodiment 11 111 12 121 ❹ 13, 83 131, 831 132 133 134.834 135.835 136 137 One of the circuit board boards has no ground plane area Indirect ground ground plane one edge antenna element dielectric substrate medium One surface of the substrate radiates the metal portion to feed the metal portion, the first metal member, the second metal member, the specific pitch 12 200952264 138,838: short-circuit metal member 14, 84: feed metal connection line 15, 85: short-circuit metal connection line 16 • signal source 21 : First Resonance Mode 22: Second Resonance Mode 23: Third Resonance Mode 8: Antenna of the Invention - Other Embodiments ❹ 13