201143205 六、發明說明： 【發明所屬之技術領域】 ' 本發明係關於一種行動通訊裝置天線，特別是一種具 有兩個寬頻操作頻帶之行動通訊裝置天線。 【先前技術】 隨著無線通訊技術的快速發展，已促使長期演進(LTE， Long Term Evolution)行動通訊技術的誕生，代表著行動通 •訊裝置天線將需要涵蓋更寬的頻寬，例如098〜960 MHz 及1710〜2690 MHz來涵蓋LTE700/2300/2500三頻操作及 無線廣域網路(WWAN，Wireless Wide Area Network)五頻操 作。此時，要同時兼顧LTE/WWAN八頻操作以及天線體積 縮小化成為天線設計上之一大挑戰。目前傳統行動通訊裝 置天線之操作頻寬，大多無法同時滿足LTE/WWAN八頻操 作之所需，例如台灣專利公告號第1295517號“一種内藏 鲁式夕頻天線，揭示一種麵合式饋入之多頻行動通訊裝 置’其操作頻帶僅可涵蓋GSM900/1800/1900/UMTS四頻操 作’無法滿足所需之LTE/WWAN之八頻操作。 【發明内容】 為了解決上述先前技術之問題，本發明提出一種行動 通訊裝置天線，適用於LTE/WWAN之八頻操作，同時具有 縮小化之天線尺寸。 本發明之行動通訊裝置天線包含：一接地面，該接地 201143205 面具有-短路點；-介質基板，該介質基板鄰近該接地面； -饋入部’該饋人部位於該介質基板上，該饋人部之一端 ，為該天線之饋入點；及一輻射部，該輕射部至少部份 位於該介質基板上，其包含：一短路輕射部，該短路轄射 部長度至少為該饋入部長度之2倍，該短路輕射部一端連 接至該接地面之該短路點，其另一端為一開口端，該短路 韓射部並具有複數次，彎折，使該短路輕射部之開口端朝向 接近該短路㈣部包含短路端之末端區間延伸，該短路幸5 籲射部包含開口端之前端區間並與該饋入部之部分區間田 -麵合間距’經由_合間距，該短路簡部由該饋入部 電容柄合激發；及-支路轄射部，該支路轄射部一端電氣 連接至該短路轄射部包含短路端之末端區間，其另一 -開口端，該支純射部於二個特定頻率分別產生一. 模態，增加該天線第-操作頻帶及第二操作頻帶之操作頻 寬。 本發明之行動通訊裝置天線可以產生兩個寬 帶，在⑽返回損失的定義之下，第—操作 LTE7_GSM850/900 (698 〜96〇MHz)三频操作第 頻帶足以涵蓋 GSM18__/UMTS/ LTE23_5 7 〜2690 MHz)五頻操作。在本發明中，該短路 少為該饋人部長度之2倍，且該短路細部包含開口端 前端區間長度至少5_，且該前端區間與該饋入部且有 小於3匪之麵合間距，因此藉由_合_， 可以電容搞合激發該短路輕射部1用該切㈣部電 201143205 連結至該短路輻射部包含短路端之末端區間，並調整該支 路輻射部之長度使其長度約為第一操作頻帶中心頻率之四 分之一波長，該支路輻射部於二個不同特定頻率分別產生 一共振模態，增加該天線第一操作頻帶及第二操作頻帶之 操作頻寬。藉由該短路輻射部及該支路輻射部所產生之共 振模態，使該天線足以涵蓋LTE/WWAN八頻操作。且由於 該短路輻射部具有複數次彎折，使天線整體寬度縮短，可 達成縮小天線體積之目的。 【實施方式】 第1圖為本發明第一實施例1之結構圖。第一實施例 1包含一接地面10,該接地面10可為一筆記型電腦液晶螢 幕之金屬背板或一行動通訊裝置之系統接地面，該接地面 10並具有一短路點101 ; —介質基板11，該介質基板鄰近 該接地面10 ; —饋入部12，該饋入部12可使用印刷或蝕 刻技術形成於該介質基板11上，且該饋入部12具有一饋 入點121，該饋入部12經由該饋入點121連接至一信號源 17 ; —輻射部13，該輻射部13可使用印刷或蝕刻技術形 成於該介質基板11上，並包含：一短路輻射部14及一支 路輻射部15。該短路輻射部14長度至少為該饋入部12長 度之2倍，該短路輻射部14 一端連接至該接地面10之該 短路點101，其另一端為一開口端，該短路輻射部並具有 複數次彎折，使該短路輻射部之開口端朝向接近該短路輻 射部包含短路端之末端區間143延伸，該短路輻射部包含 201143205 141並與該饋入部之部分區間具有一輕201143205 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a mobile communication device antenna, and more particularly to a mobile communication device antenna having two broadband operating bands. [Prior Art] With the rapid development of wireless communication technology, the long-term evolution (LTE, Long Term Evolution) mobile communication technology has been promoted, representing that the mobile communication device antenna will need to cover a wider bandwidth, such as 098~ 960 MHz and 1710~2690 MHz to cover LTE700/2300/2500 tri-band operation and wireless wide area network (WWAN) wireless five-band operation. At this time, it is a big challenge in antenna design to simultaneously consider the LTE/WWAN eight-frequency operation and the reduction of the antenna size. At present, the operating bandwidth of conventional mobile communication device antennas cannot meet the requirements of LTE/WWAN eight-frequency operation at the same time. For example, Taiwan Patent Publication No. 1295517 "a built-in Lu-style antenna, revealing a face-to-face feed. The multi-frequency mobile communication device 'its operating band can only cover GSM900/1800/1900/UMTS four-frequency operation' cannot meet the required LTE/WWAN eight-frequency operation. SUMMARY OF THE INVENTION In order to solve the above problems of the prior art, the present invention proposes A mobile communication device antenna suitable for LTE/WWAN eight-frequency operation and having a reduced antenna size. The mobile communication device antenna of the present invention comprises: a ground plane, the ground 201143205 surface has a short circuit point; - a dielectric substrate, The dielectric substrate is adjacent to the ground plane; the feed portion is located on the dielectric substrate, one end of the feed portion is a feed point of the antenna, and a radiation portion is at least partially located The dielectric substrate includes: a short-circuiting light-emitting portion having a length at least twice the length of the feeding portion, and the short-circuiting light-emitting portion is connected at one end The short-circuit point to the ground plane is an open end, and the short-circuited Korean portion has a plurality of times, and the bent end is bent such that the open end of the short-circuited light-emitting portion faces the end of the short-circuited end (four) portion including the short-circuited end Interval extension, the short-circuiting portion 5 includes a front end portion of the open end and a field-to-surface spacing of the portion of the feeding portion via a _ spacing, the short circuit portion being excited by the feeding portion capacitor handle; and a branch road arranging portion, one end of the branching portion of the branch is electrically connected to the end portion of the short-circuiting illuminating portion including the short-circuit end, and the other-opening end, the pure-emitting portion respectively generates one at two specific frequencies. State, increasing the operating bandwidth of the antenna first operating band and the second operating band. The mobile communication device antenna of the present invention can generate two broadband, under the definition of (10) return loss, the first operation LTE7_GSM850/900 (698~ 96 〇 MHz) The frequency band of the tri-band operation is sufficient to cover the GSM 18__/UMTS/LTE 23_5 7 to 2690 MHz) five-frequency operation. In the present invention, the short circuit is less than twice the length of the feed portion, and the short-circuit detail includes the open end Front end interval The degree is at least 5 _, and the front end section and the feeding portion have a face-to-face spacing of less than 3 ,. Therefore, by the _ _ _, the short-circuiting light-emitting portion 1 can be excited by the capacitor (the fourth-phase electric power 201143205) The short-circuit radiating portion includes an end portion of the short-circuit end, and adjusts the length of the branch radiating portion to be about a quarter of a wavelength of a center frequency of the first operating band, and the branch radiating portion is respectively generated at two different specific frequencies. a resonant mode, increasing an operating bandwidth of the first operating band and the second operating band of the antenna, wherein the antenna is sufficient to cover LTE/WWAN by the resonant mode generated by the short-circuit radiating portion and the branch radiating portion Frequency operation. Further, since the short-circuiting radiation portion has a plurality of bendings, the overall width of the antenna is shortened, and the purpose of reducing the volume of the antenna can be achieved. [Embodiment] FIG. 1 is a configuration diagram of a first embodiment of the present invention. The first embodiment 1 includes a ground plane 10, which may be a metal backplane of a notebook computer LCD screen or a system ground plane of a mobile communication device, the ground plane 10 having a short circuit point 101; a substrate 11 adjacent to the ground plane 10; a feed portion 12 formed on the dielectric substrate 11 by printing or etching techniques, and the feed portion 12 has a feed point 121, the feed portion 12 is connected to a signal source 17 via the feed point 121; a radiation portion 13 formed on the dielectric substrate 11 using printing or etching techniques, and comprising: a short-circuit radiating portion 14 and a radiation path Part 15. The short-circuit radiating portion 14 has a length at least twice the length of the feeding portion 12, and one end of the short-circuiting radiating portion 14 is connected to the short-circuit point 101 of the grounding surface 10, and the other end thereof is an open end, and the short-circuiting radiating portion has a plurality of The second bending is performed such that the open end of the short-circuiting radiation portion extends toward the end portion 143 near the short-circuiting radiation portion including the short-circuiting end, and the short-circuiting radiation portion includes 201143205 141 and has a light portion with the portion of the feeding portion
口端之前端區間141、中央區間 142及包3短路端之末端區間143)由該饋入部12電容麵合 開口端之前端區間 合間距17，經由玆 激^該支路輻射部ι5_端電氣連接至該短路轄射部包含 短路端之末端區間143，其另一端為—開口端，該支_ 射部15於二個不同特定頻率分別產生-共振模態，增加該 天線第-操作頻帶21及第二操作頻帶22之操作頻寬。 第2圖為本發明第一實施例1之量測返回損失圖。於 第一貫施例1中選擇下列尺寸來進行實驗：接地面1〇長度 約為260 mm，寬度約為2〇〇 mm;介質基板u選用長度約 為75 mm，寬度約為1〇 mm，厚度約為〇 8mm之玻璃纖維 基板，饋入部12長度約為30 mm，寬度約為2 mm ;短路 輻射部14長度約為85 mm，寬度約為1 mm ;支路輻射部 15長度約為70 mm，寬度約為1 mm。如第2圖所示，第 一實施例1可產生該第一操作頻帶21及該第二操作頻帶 22 ’在6 dB返回損失的定義之下，第一操作頻帶21足以 涵蓋 LTE700/GSM850/900 (698 〜960 MHz)三頻操作，第二 操作頻帶22足以涵蓋 GSM1800/1900/UMTS/ LTE2300/2500 (1710 〜2690 MHz)五頻操作。 第3圖為本發明第二實施例3之結構圖，與第一實施 例1之差異在於該輻射部33至少部份區間係以沖壓或切割 技術由一金屬片製作而成。第二實施例3之操作原理與第 一實施例1相同’藉由適度調整天線尺寸即可達到與第一 201143205 實施例1相似之結果，因此不再贅述。 第4圖為本發明第三實施例4之結構圖與第一 例1之差異在於其包二個支路輻射部45、46，亦即至I施 含-個支路輻射部。第三實施例4之操作原理與J::包 例1相同，該支路輻射部45至少於一特定頻率產生一共知 模態，增加天線操作頻寬，該支路輻射部46亦可至少 特定頻率產生-共漏態，增加天線操作較，達=與= 一實施例1相似之結果。 、 以上說明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。即凡依本發明申請專利範圍所作之 變化與修飾，皆應仍屬本發明專利涵蓋之範圍内。 【圖式簡單說明】 第1圖為本發明第一實施例之結構圖。 • 第2圖為本發明第一實施例之量測返回損失圖。 第3圖為本發明第二實施例之結構圖。 第4圖為本發明第三實施例之結構圖。 201143205 【主要元件符號說明】 :第一實施例 3 第二實施例 4 第三實施例 10 接地面 101 短路點 11 介質基板 12 饋入部 121 饋入點 13, 33, 43 幸虽射部 14, 34, 44 短路輻射部 141，341，441 短路輻射部包含開口端之前端區間 142, 342, 442 短路輻射部之中央區間 143, 343, 443 短路輻射部包含短路端之末端區間 15, 35, 45, 46 支路輻射部 16, 36 耦合間距 17 信號源 21 第一操作頻帶 22 第二操作頻帶The end portion 141 of the mouth end, the central portion 142, and the end portion 143 of the short-circuit end of the packet 3 are electrically connected to the opening end of the feed portion 12 at a distance of 17 from the front end portion, and the branch portion is radiated by the branch portion radiation portion ι5_ The end portion 143 of the short-circuiting portion including the short-circuit end is connected to the end portion 143, and the other end is an open end. The branch portion 15 respectively generates a -resonance mode at two different specific frequencies, and increases the antenna-operating frequency band 21 And the operating bandwidth of the second operating band 22. Figure 2 is a graph showing the measured return loss of the first embodiment of the present invention. In the first embodiment 1, the following dimensions were selected for the experiment: the ground plane 1 〇 has a length of about 260 mm and a width of about 2 〇〇 mm; the dielectric substrate u has a length of about 75 mm and a width of about 1 〇 mm. A glass fiber substrate having a thickness of about 8 mm, the feed portion 12 has a length of about 30 mm and a width of about 2 mm; the short-circuited radiation portion 14 has a length of about 85 mm and a width of about 1 mm; and the branch radiation portion 15 has a length of about 70 mm. Mm, width is about 1 mm. As shown in FIG. 2, the first embodiment 1 can generate the first operating band 21 and the second operating band 22' under the definition of 6 dB return loss, and the first operating band 21 is sufficient to cover LTE700/GSM850/900. (698 to 960 MHz) tri-band operation, the second operating band 22 is sufficient to cover GSM1800/1900/UMTS/LTE2300/2500 (1710 to 2690 MHz) five-frequency operation. Fig. 3 is a structural view showing a second embodiment of the present invention, which differs from the first embodiment in that at least a portion of the section of the radiating portion 33 is formed of a metal sheet by a stamping or cutting technique. The operation principle of the second embodiment 3 is the same as that of the first embodiment. The result similar to the first embodiment of the first 201143205 can be achieved by appropriately adjusting the antenna size, and therefore will not be described again. Fig. 4 is a view showing the difference between the structure of the third embodiment of the present invention and the first example 1 in that it includes two branch radiating portions 45, 46, i.e., to -1 branch radiating portions. The operation principle of the third embodiment 4 is the same as J:: package example 1. The branch radiation portion 45 generates a common mode at least at a specific frequency, and increases the antenna operation bandwidth. The branch radiation portion 46 can also be at least specified. The frequency is generated - the total leakage state, and the antenna operation is increased, up to = a result similar to that of the embodiment 1. The embodiments described above are merely illustrative of the principles and advantages of the invention and are not intended to limit the invention. All changes and modifications made to the scope of the patent application of the present invention are still within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing a first embodiment of the present invention. • Fig. 2 is a measurement return loss map of the first embodiment of the present invention. Fig. 3 is a structural view showing a second embodiment of the present invention. Fig. 4 is a structural view showing a third embodiment of the present invention. 201143205 [Description of main component symbols]: First Embodiment 3 Second Embodiment 4 Third Embodiment 10 Ground plane 101 Short-circuit point 11 Medium substrate 12 Feeding portion 121 Feeding points 13, 33, 43 Fortunately, the radiation portion 14, 34 , 44 short-circuit radiating portion 141, 341, 441 short-circuit radiating portion including open end front end section 142, 342, 442 short-circuit radiating portion central section 143, 343, 443 short-circuit radiating portion including short-circuit end end section 15, 35, 45, 46 branch radiating section 16, 36 coupling spacing 17 signal source 21 first operating band 22 second operating band