1364136 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種多頻短路單極天線，藉由激發 機制的混合使得天線可操作於GSM850/900/DCS/PCS/UMTS 行動通訊頻帶，並適用於一般行動手機之應用範圍。 【先前技術】 多頻（Multiband)或寬頻（Broadband)行動手機天線是 目前產業界最需要的天線設計之一，隨著天線頻寬的增 加，可傳輸資料量也相對增加，進而使得行動手機所提 供的服務項目也會變多，連同服務品質也相對提昇。不 過，以現今天線設計的技術而言，倘若想要滿足較低頻 GSM850/900的頻帶需求是相當具有挑戰性的，再加上， 天線也需要提供較高頻帶的操作，特別是在有限制的空 間尺寸條件下是相當難達成的；而在設計過程中，往往 設計出具雙頻操作的低頻特性，在高頻卻不.能滿足頻寬 需求，或者，天線擁有很好的高頻頻寬，又卻沒有雙頻 操作的低頻操作，使得設計者在初期都必須面臨這個兩 難的局面。一般就天線種類而言，單極天線是較能符合 寬頻或多頻特性的天線設計，不過相對上所需付出的空 間尺寸也較大，如台灣專利公告號第M266,566號“多頻 手機天線”，其揭示一種適用於三頻操作之短路單極天 線，運用三條共振路徑產生三頻特性，且路徑的相互交 錯而使得相互影響變大，故低頻模態亦很難達成兩頻的 1364136 操作需求。另外，台灣專利公告號第1245,452號“兩用式 多頻單極天線”，其揭示一種多路徑的單極天線設計， 由於天線輻射元件由金屬線段所組成並形成於一基板之 周圍表面，故需要佔據手機内部較多的空間。而美國專 利申請公開第US20060238424A1號“操作於多頻系統之 天線結構（Antenna Structure for Operating Multi-band System)”， 其揭示一種可四頻操作（AMPS/GSM/DCS/PCS)之金屬繞線 式結構之天線設計，而該設計的精準度在量產過程中將 3 會是一個需要花成本去檢視的課題，再者，該設計之輻 射元件為一個立體結構，相當佔空間，同時也壓縮了行 動通訊產品内部其他元件可運用的空間。 為了解決以上問題，我們提出一種平面式的多頻短 路單極天線設計，並結合了一種有別於設計傳統手機天 線的概念與方法-結合電流激發機制與磁流激發機制， 我們可以輕易地在不佔據太多手機内部空間的情況下，1364136 IX. Description of the Invention: [Technical Field] The present invention relates to a multi-frequency short-circuit monopole antenna, which can be operated in the GSM850/900/DCS/PCS/UMTS mobile communication band by a mixture of excitation mechanisms. And it is suitable for the application range of general mobile phones. [Prior Art] Multiband or Broadband mobile phone antenna is one of the most needed antenna designs in the industry. As the antenna bandwidth increases, the amount of data that can be transmitted increases, which in turn makes mobile phones The number of service offerings will also increase, and the quality of service will increase. However, in terms of the technology currently designed today, it is quite challenging to meet the bandwidth requirements of the lower frequency GSM850/900. In addition, the antenna also needs to provide higher frequency band operation, especially in the case of limitations. Under the condition of space size, it is quite difficult to achieve; in the design process, the low-frequency characteristics of dual-frequency operation are often designed, but the high-frequency does not meet the bandwidth requirement, or the antenna has a good high-frequency bandwidth. But there is no low-frequency operation of dual-frequency operation, so designers must face this dilemma in the initial stage. Generally speaking, in terms of the type of antenna, a monopole antenna is an antenna design that can conform to broadband or multi-frequency characteristics, but the space required for the relatively large antenna is also relatively large, such as Taiwan Patent Publication No. M266, 566 "Multi-frequency mobile phone. "Antenna", which discloses a short-circuit monopole antenna suitable for tri-band operation, uses three resonant paths to generate tri-frequency characteristics, and the paths are interlaced to make the mutual influence become large, so the low-frequency mode is also difficult to achieve the two-frequency 1364136 Operational requirements. In addition, Taiwan Patent Publication No. 1245, 452 "Dual-Use Multi-Frequency Monopole Antenna" discloses a multi-path monopole antenna design in which an antenna radiating element is composed of a metal line segment and formed on a peripheral surface of a substrate. Therefore, it is necessary to occupy more space inside the mobile phone. U.S. Patent Application Publication No. US20060238424A1, "Antenna Structure for Operating Multi-band System", which discloses a metal-wound structure capable of four-frequency operation (AMPS/GSM/DCS/PCS) The antenna design, and the accuracy of the design will be a subject that needs to be costed to be examined during the mass production process. Furthermore, the radiating element of the design is a three-dimensional structure, which takes up considerable space and also compresses the action. The space available for other components within the communication product. In order to solve the above problems, we propose a planar multi-frequency short-circuit monopole antenna design, and combine a concept and method different from the traditional mobile phone antenna design - combined with the current excitation mechanism and the magnetic current excitation mechanism, we can easily Without taking up too much space inside the phone,
一、 達成 GSM850 (824〜894 MHz)、GSM900 (880~%0 MHz)、DCS Ο (1710〜1880 MHz)、PCS (1850〜1990 MHz 與 UMTS (1920〜2170 MHz)的行動通訊頻帶的操作。本發明天線的特色在於’ 短路單極天線（電流激發）與槽孔天線（磁流激發）形 成在一片介質基板上，且兩天線還能獨立地操作，故本 設計，結構簡單、製作成本低廉。另外，本設計利用單 一饋入方式同時激發短路單極天線及槽孔天線，使得天 線在較低和較高操作頻帶皆各自可形成寬頻操作以達成 五頻操作的特性。 7 1364136 【發明内容】 如上所述’本發明的創新之處是在於提供一種具有 夕頻操作之合式天線，以符合目前行動通訊設備的操 作頻帶需求。 μ 本發明係包括：一介質基板、一接地面、一輻射金 屬部、一短路金屬線與一饋入連接線。該介質基板具有 上方邊緣，該接地面位於該介質基板上，但並未佔滿 該介質基板，使得在該介質基板之上方邊緣附近具有一 無接地面區間；該輻射金屬部為一平面結構且大致垂直 位於該介質基板之上方邊緣’並包含：一支樓介質基 板、一輻射金屬片、一槽孔與一饋入金屬部。其中，該 支撐介質基板具有一第一表面及一相對於該第一表面之 第一表面；而該輻射金屬片具有一短路點且位於該支撐 ^丨質基板之第一表面上；該槽孔位於該輻射金屬片上， 且大致沿著該輻射金屬片之邊緣環繞，其一端並朝向該 .輻射金屬片之内部延伸；該饋入金屬部位於該支撐介質 基板之第二表面上，並具有一饋入點；該短路金屬線位 於該介質基板之無接地面區間上，—端電氣連接至該接 地面，另一端則電氣連接至該輻射金屬片上之短路點； 該饋入連接線位於該介質基板之無接地面區間上，一端 電氣連接至_人金屬部之饋人點，另-㈣電氣連接 至一信號源。 在本發明中，我們提出一項獨特的設計概念，即電 激發機制與磁流激發機制的整合。而這項設計概念的 1364136 邊緣ill ，並包含：一支撐介質基板14，具有一第一表 面141及一相對於該第一表面141之第二表面142 ; 一 輻射金屬片15，位於該支撐介質基板14之第一表面141 上，並具有一短路點151 ; —槽孔16，位於該輻射金屬 片15上，大致沿著該輻射金屬片15之邊緣環繞，其一端 並朝向該輻射金屬片15之内部延伸；及一饋入金屬部 Π，位於該支撐介質基板14之第二表面142上，並具有 一饋入點171 ; —短路金屬線18，位於該介質基板 無接地面區間112上，一端電氣連接至該接地面12，另 一^則電氣連接至該輻射金屬片15上之短路點151 ;及 一饋入連接線19，位於該介質基板丨丨之無接地面區間 112上，一端電氣連接至該饋入金屬部η之饋入點 171 ’另一端則電氣連接至一信號源19ι 。 第2圖為本發明天線一實施例1之返回損失量測 結果。在本實施例中，該接地面12之尺寸大致為45 x lOOnrni2 ^該介質基板η之無接地面區間112之尺寸則 大致為7 x45mm2。該輻射金屬片15之尺寸大致為1〇χ 45 mm ’而該槽孔之寬度約為〇 5 mm，長度約為1〇8 mm »該饋入金屬部之寬度約為1 mm，長度約為μ mm。由實際里測所得到的實驗結果’在6犯返回損失 的定義下，其第一共振模態211與第二共振模態212可 結合成一較低操作頻帶21來滿足GSM850/900之頻帶需 求，同時，第三共振模態221 、第四共振模態222與第 五共振模態223也可以形成一較高操作頻帶22，來涵蓋 1364136 DCS/PCS/UMTS之頻帶需求。 弟3圖及第4圖各為本發明天線一實施例i於 860 MHz與920 MHz之輻射場型圖。由所得之結果，.天 .線第一操作頻帶21與第二操作頻帶22之輻射場型與傳統 内藏式天線共振於相同頻率時的輻射場型相似。而第5 圖到第7圖分別為本發明天線一實施例i於1795 、 1920 MHz及2045MHz之輻射場型圖。由所得之結果，天 線較咼操作頻帶22内不同頻率之輻射場型皆相當類似， ^ 並適合於行動通訊裝置之應用。 第8圖及第9圖分別為本發明天線之第一其他實 鉍例及第二其他實施例。而第一其他實施例和實施例1 的整體結構大致上相同，唯其槽孔86之寬度不是一定 值；有別於實施例1的結構，第二其他實施例之輻射金 屬片95係一四角為圓弧狀之矩形，且槽孔妬在彎折處也 邊成圓弧形分佈。上述說明的兩個其他實施例皆可順利 〇 激發出五個共振模態，並可達到與實施例丨相似的特 性。 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。 1364136 【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挪社果 第3圖為本發明天線一實施例於860 MHz之輕射尸型曰 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1795 MHz之輕射場型圖。 第6圖為本發明天線一實施例於1920 MHz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圖為本發明天線第一其他實施例結構圖。 第9圖為本發明天線第二其他實施例結構圖。 【主要元件符號說明】 I :本發明天線一實施例 II :介質基板 III :介質基板之上方邊緣 112 :介質基板上之無接地面區間 12 _·接地面 13 :輻射金屬部 14 :支撐介質基板 141 :支樓介質基板之第一表面 142 :支撐介質基板之第二表面 15 、95 :輻射金屬片 151 :短路點 16 、86 、96 :槽孔 12 1364136 17 :饋入金屬部 171 :饋入點 18 :短路金屬部 19 :饋入連接線 191 :信號源 21 :較低操作頻帶 211 :第一共振模態 0 212 :第二共振模態 22 :較高操作頻帶 .221 :第三共振模態 222 :第四共振模態 第五共振模態 2231. Operation of GSM850 (824~894 MHz), GSM900 (880~%0 MHz), DCS Ο (1710~1880 MHz), PCS (1850~1990 MHz and UMTS (1920~2170 MHz) mobile communication bands. The antenna of the present invention is characterized in that a short-circuit monopole antenna (current excitation) and a slot antenna (magnetic current excitation) are formed on a dielectric substrate, and the two antennas can be operated independently, so the design is simple in structure and low in production cost. In addition, the design uses a single feed mode to simultaneously excite short-circuit monopole antennas and slot antennas, so that the antennas can each form a wide-band operation in the lower and higher operating bands to achieve the characteristics of five-frequency operation. 7 1364136 [ SUMMARY OF THE INVENTION As described above, the innovation of the present invention is to provide a combined antenna having a uni-frequency operation to meet the operating band requirements of current mobile communication devices. μ The present invention includes: a dielectric substrate, a ground plane, a radiating metal portion, a shorted metal line and a feed connection line. The dielectric substrate has an upper edge, the ground plane is on the dielectric substrate, but does not fill the medium The plate has a non-grounding surface section near the upper edge of the dielectric substrate; the radiating metal portion is a planar structure and is substantially perpendicular to the upper edge of the dielectric substrate and includes: a floor dielectric substrate, a radiating metal piece a slot and a feed metal portion, wherein the support medium substrate has a first surface and a first surface opposite to the first surface; and the radiating metal sheet has a short circuit point and is located at the support a first surface of the substrate; the slot is located on the radiating metal sheet and substantially surrounds the edge of the radiating metal sheet, one end of which extends toward the inside of the radiating metal sheet; the feeding metal portion is located at the support a second surface of the dielectric substrate and having a feed point; the short metal wire is located on the groundless surface of the dielectric substrate, the end is electrically connected to the ground plane, and the other end is electrically connected to the radiation metal sheet Short-circuit point; the feed connection line is located on the non-ground plane of the dielectric substrate, one end is electrically connected to the feed point of the _ human metal part, and the other - (four) electrical connection To a signal source. In the present invention, we propose a unique design concept, that is, the integration of an electrical excitation mechanism and a magnetic flow excitation mechanism. The design concept of the 1364136 edge ill includes: a supporting dielectric substrate 14, A first surface 141 and a second surface 142 opposite to the first surface 141; a radiating metal sheet 15 on the first surface 141 of the supporting dielectric substrate 14 and having a short-circuit point 151; The radiation metal sheet 15 is disposed substantially along the edge of the radiation metal sheet 15, and has one end extending toward the inside of the radiation metal sheet 15; and a feeding metal portion 位于 located on the supporting dielectric substrate 14. The second surface 142 has a feed point 171; a shorted metal line 18 on the dielectric substrate non-ground plane section 112, one end is electrically connected to the ground plane 12, and the other is electrically connected to the radiating metal a short-circuit point 151 on the sheet 15; and a feed-in connection line 19 on the ground-free surface portion 112 of the dielectric substrate, one end electrically connected to the feed point 171 of the feed metal portion η' and the other end is electrically Connected to a signal source 19ι. Fig. 2 is a graph showing the return loss measurement result of the first embodiment of the antenna of the present invention. In this embodiment, the size of the ground plane 12 is approximately 45 x lOOnrni2. The dimension of the ground plane 112 of the dielectric substrate η is approximately 7 x 45 mm2. The radiant metal piece 15 has a size of approximately 1 〇χ 45 mm ' and the slot has a width of about mm5 mm and a length of about 1 〇 8 mm. The width of the feed metal portion is about 1 mm and the length is about μ mm. The experimental results obtained from the actual measurement 'under the definition of 6 return loss, its first resonant mode 211 and the second resonant mode 212 can be combined into a lower operating band 21 to meet the GSM850/900 band requirements, At the same time, the third resonant mode 221, the fourth resonant mode 222 and the fifth resonant mode 223 may also form a higher operating band 22 to cover the band requirements of 1364136 DCS/PCS/UMTS. Figure 3 and Figure 4 are radiation pattern diagrams of an embodiment of the antenna of the present invention at 860 MHz and 920 MHz. As a result of the obtained, the radiation pattern of the first operating band 21 and the second operating band 22 of the line is similar to that of the conventional built-in antenna at the same frequency. 5 to 7 are radiation pattern diagrams of an antenna of the present invention at 1795, 1920 MHz, and 2045 MHz, respectively. As a result of the results, the antennas are quite similar to the radiation patterns of different frequencies in the operating band 22, and are suitable for use in mobile communication devices. Figs. 8 and 9 are respectively a first other embodiment of the antenna of the present invention and a second other embodiment. The first embodiment is substantially the same as the overall structure of the first embodiment, except that the width of the slot 86 is not a certain value; unlike the structure of the first embodiment, the second embodiment of the radiation metal sheet 95 is one of four. The corner is an arc-shaped rectangle, and the slot holes are also arranged in a circular arc shape at the bend. Both of the other embodiments described above can smoothly excite five resonant modes and achieve similar characteristics to the embodiment. 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. 1364136 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing an embodiment of an antenna according to the present invention. 2 is a return loss amount of an embodiment of the antenna of the present invention. FIG. 3 is an embodiment of an antenna according to the present invention at 860 MHz. FIG. 4 is an embodiment of an antenna according to the present invention at 925 MHz. Radiation pattern map. Figure 5 is a light shot field diagram 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 showing the first embodiment of the antenna of the present invention. Figure 9 is a structural view showing a second embodiment of the antenna of the present invention. [Main component symbol description] I: The antenna of the present invention is an embodiment II: dielectric substrate III: upper edge 112 of the dielectric substrate: no ground plane interval 12 on the dielectric substrate _· ground plane 13: radiating metal portion 14: supporting dielectric substrate 141: first surface 142 of the support medium substrate: second surface 15 supporting the dielectric substrate 15, 95: radiating metal sheet 151: short-circuit point 16, 86, 96: slot 12 1364136 17: feeding metal portion 171: feeding Point 18: Short-circuit metal portion 19: Feed-in connection line 191: Signal source 21: Lower operating band 211: First resonant mode 0 212: Second resonant mode 22: Higher operating band. 221: Third resonant mode State 222: fourth resonance mode fifth resonance mode 223