200830636 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種雙頻天線，尤其是一種具有雙饋入 之雙頻天線，適用於無線通訊產品手機上。 【先前技術】 隨著無線通訊的快速發展，在無線通訊產品中，天線 的性能成為影響通訊產品接收與傳輸信號品質的關鍵之一 。台灣發明專利第][257,740號“供雙頻帶通信裝置用之雙頻 帶内部天線”，揭示一種適用於雙頻帶之倒F形天線設計 ’但該天線僅具有一單饋入，實際應用時一般必須先連接 至一切換電路（diplexer)，分離出兩個不同之饋入訊號（如 GSM及DCS) ’再連接至後端模組。此一切換電路將會佔據 手機電路模組之一部分空間，也會消耗部分功率，造成整 體天線效率降低，同時還會增加匹配之複雜度。 【發明内容】 為解决每些問題，我們提出一種具有雙饋入之雙頻天 線的創新設計，不僅 +僅了冋％產生一低頻操作頻帶（GSM，89〇 MHz) 间頻操作頻帶（DCS，1710〜1880 MHz)，更因其雙 饋入之間具有高隔離度 ^_ 厌之特性，不須於天線饋入端外加一 切換電路，即可吉技 ^ r A _ . , 、ι入端連接至後端GSM/DCS模組。 此雙饋入設計省去該切振 ，謓I 、路在手機電路模組所需之空間 讓手機電路模組有更多1 他應用空間，亦可減少功率消 7 200830636 耗，簡化匹配之複雜度，而提高整體 如上所述，本發明之目的在於提 雙頻手機天線的創新設計，可以達成 之操作。本發明天線包含：一接地面 二天線，一第一饋入信號組件及一第 接地面之形狀大致為一矩形，且在該 短路點與一第二短路點。該第一天線 屬部’位於該接地面上方，大致平行 馨 生該天線之第一（較低）操作頻帶， ;及一第一短路金屬部，其一端電氣 屬部’另一端電氣連接至該接地面之 天線包含：一第二輻射金屬部，位於 平行於該接地面，用於產生該天線之 帶，且具有一第二饋入點；及一第二 電氣連接至該第二輻射金屬部，另一 Φ 面之第二短路點。該第一饋入信號組 第一天線之間，並包含：一第一饋入 入金屬部，其一端電氣連接至該第一 入點，另一端連接至該第一饋入信號 組件位於該接地面與該第二天線之間 入信號源；及一第二饋入金屬部，其 二輻射金屬部之第二饋入點，另一端 號源。 天線效率。 供一種具有雙饋入之 適用於GSM/DCS頻帶 ，一第一天線，一第 -一饋入化號組件。該 接地面上具有一第一 包含：一第一輻射金 於該接地面，用於產 且具有一第一饋入點 連接至該第一輻射金 第一短路點。該第二 該接地面上方，大致 第二（較高）操作頻 短路金屬部，其一端 端電氣連接至該接地 件位於該接地面與該 仏7虎源，及一第"饋 輻射金屬部之第一饋 源。该弟二饋入信號 ，並包含：一第二饋 一端電氣連接至該第 連接至該第二饋入信 8 200830636 天線之短路金 之隔離度得以 • 在本發明設計中，該第一天線與該第二 屬部沒有相連，這使得該第一與該第二天線 有效改善，達成具有高隔離度之雙饋入設計 【實施方式】200830636 IX. INSTRUCTIONS: [Technical Field] The present invention relates to a dual-band antenna, and more particularly to a dual-band antenna with dual feed, which is suitable for use in a wireless communication product mobile phone. [Prior Art] With the rapid development of wireless communication, in wireless communication products, the performance of the antenna has become one of the key factors affecting the quality of receiving and transmitting signals of communication products. Taiwan Invention Patent No. [257,740 "Double-band internal antenna for dual-band communication devices", discloses an inverted-F antenna design suitable for dual-bands. However, the antenna has only one single feed, which is generally necessary for practical applications. First connected to a switcher (diplexer), separate two different feed signals (such as GSM and DCS) 'reconnected to the back-end module. This switching circuit will occupy a part of the space of the mobile circuit module, and will also consume part of the power, which will reduce the efficiency of the whole antenna and increase the complexity of matching. SUMMARY OF THE INVENTION In order to solve each problem, we propose an innovative design of a dual-frequency antenna with dual feeds, which not only produces a low frequency operating band (GSM, 89 〇 MHz) inter-frequency operating band (DCS, only 冋%). 1710~1880 MHz), because of its high isolation between the double feeds, it is not necessary to add a switching circuit to the antenna feed end, so that it can be agitated ^ r A _ . , , ι Connect to the backend GSM/DCS module. This double-infeed design eliminates the vibration, and the space required for the mobile phone circuit module in the mobile phone circuit module allows the mobile circuit module to have more application space, and can also reduce the power consumption, simplifying the matching complexity. Degree, and improvement As described above, the object of the present invention is to provide an innovative design of a dual-frequency mobile phone antenna, which can be achieved. The antenna of the present invention comprises: a ground plane, two antennas, a first feed signal component and a first ground plane having a substantially rectangular shape, and a short circuit point and a second short circuit point. The first antenna element portion is located above the ground plane, substantially parallel to the first (lower) operating frequency band of the antenna, and a first short-circuit metal portion having one end of the electrical portion and the other end electrically connected to The antenna of the ground plane includes: a second radiating metal portion located parallel to the ground plane for generating the antenna strip and having a second feed point; and a second electrical connection to the second radiating metal The second short-circuit point of the other Φ plane. The first feed signal group is between the first antennas and includes: a first feed-in metal portion, one end of which is electrically connected to the first in point, and the other end of which is connected to the first feed signal component. A signal source is connected between the ground plane and the second antenna; and a second feed metal portion, the second feed point of the second radiating metal portion, and the other end source. Antenna efficiency. For a dual-input application for the GSM/DCS band, a first antenna, a first-to-one feed number component. The ground plane has a first surface comprising: a first radiation gold to the ground plane for producing and having a first feed point connected to the first radiation gold first short circuit point. Above the second grounding surface, a substantially second (higher) operating frequency short-circuited metal portion, one end of which is electrically connected to the grounding member at the grounding surface and the 仏7 tiger source, and a first "feeding metal portion The first feed. The second feed signal, and includes: a second feed end electrically connected to the second connection letter to the second feed signal 8 200830636 antenna short circuit gold isolation is made in the design of the present invention, the first antenna The second genus is not connected, which makes the first and the second antenna effectively improved, achieving a double feed design with high isolation [Embodiment]
第1圖為本發明天 線主要實施例1包含： ，且在該接地面上具有 112 ; —第一天線12， 位於該接地面][丨上方， 該天線之第一（較低） 122 ’及一第一短路金 一輻射金屬部m ，另 短路點111 ; 一第二天 131 ，位於該接地面u 於產生該天線之第二（ 入點132 :及一第二短 該弟一輪射金屬部131 第二短路點112 ; 一第 面η與該第一天線12之 141 ;及一第一饋入金 一輻射金屬部121之第 一饋入信號源141‘ ；及 接地面11與該第二天線 線主要實施例1結構 一接地面11，其形狀 一第一短路點111與 其包含··一第一輻射 大致平行於該接地面 操作頻帶，且具有一 屬部123 ’其一端電 一端電氣連接至該接 線13，其包含：一第 上方，大致平行於該 較高）操作頻帶，且 路金屬部133 ，其_ ，另一端電氣連接至 一饋入信號組件14， 間，並包含··一第一 屬部142 ，甘 Ζ 其一端電 一饋入點122 ，另一 一第二饋入信號組件 13之間，並包含：一 圖。本發明天 大致為* 矩形 一第二短路點 金屬部121 ， 11，用於產生 第一饋入點 氣連接至該第 地面11之第_ 一輪射金屬部 接地面11，用 具有一第二饋 端電氣連接至 該接地面11之 其位於該接地 饋入信號源 氣連接至該第 端連接至該第 15，其位於該 第二饋入信號 9 200830636 ^ 源m •’及一第二饋入金屬部152 ，其一端電氣連接至該 第二輻射金屬部131之第二饋入點132 ，另一端連接至該 第二饋入信號源151 。在本實施例1中，該接地面^係以 印刷或餘刻技術形成於一介質基板1〇上。此外該第一輻射 金屬部121及該第二輻射金屬部ηι ，均係以一金屬片沖 壓或切割製作而成。 第2圖為第一圖本發明天線之實施例1的反射係 (Sii 、S22)及隔離度（SZ1)量測結果。在實施例丨中選擇下 列尺寸進行量測：該接地面1 i尺寸為45 χ〗1〇 _2 ;該第一 輻射金屬部121距離該接地面n約為？mm，總長度約為 80mm(約為GSM頻帶中心頻率之1/4波長）；該第一短路金 屬部123其長度約為7mm、寬度約為2mm ;該第二輻射金 屬部131距離該接地面u約7mm ’總長度約為4〇mm(約為 DCS頻帶中心頻率之1/4波長）；該第二短路金屬部133其 長度約為7麵、寬度约為2mm ;該第一饋入金屬部142其 長度約為7麵、寬度約為2mm ;該第二饋入金屬部152其 長度約為7 mm、賞彦的矣9 mm。^ —1 is a main embodiment 1 of the antenna of the present invention comprising: and having 112 on the ground plane; a first antenna 12 located at the ground plane] [above, the first (lower) 122 of the antenna] And a first short-circuited gold-radiation metal portion m, another short-circuit point 111; a second day 131, located at the ground plane u to generate the antenna second (in point 132: and a second short-handed one-shot metal) a second short-circuit point 112; a first surface η and the first antenna 12; 141; and a first feed-in-radiation metal portion 121 of the first feed signal source 141'; and the ground plane 11 and the first The second antenna line is mainly configured as a ground plane 11 having a shape such that the first short-circuit point 111 is substantially parallel to the ground plane operating frequency band and includes a genus 123' Electrically connected to the wiring 13, comprising: an upper, substantially parallel to the higher operating band, and the metal portion 133, the other end of which is electrically connected to a feed signal component 14, and includes · A first genus 142, Ganzi, one end of which is fed a point 12 2, another second feed signal component 13 between and includes: a picture. The invention is generally a * rectangular-second short-circuit point metal portion 121, 11 for generating a first feed-point gas connection to the first-to-one shot metal portion ground plane 11 of the ground surface 11 with a second feed The terminal is electrically connected to the ground plane 11 and the ground feed signal source is connected to the first end and connected to the 15th, which is located at the second feed signal 9 200830636 ^ source m • ' and a second feed The metal portion 152 has one end electrically connected to the second feed point 132 of the second radiating metal portion 131 and the other end connected to the second feed signal source 151. In the first embodiment, the ground plane is formed on a dielectric substrate 1 by printing or a patterning technique. Further, the first radiating metal portion 121 and the second radiating metal portion ηι are formed by pressing or cutting a metal piece. Fig. 2 is a view showing measurement results of the reflection systems (Sii, S22) and the isolation (SZ1) of the first embodiment of the antenna of the present invention. In the embodiment, the following dimensions are selected for measurement: the ground plane 1 i has a size of 45 χ 〇 1 〇 _2; is the first radiating metal portion 121 approximately from the ground plane n? Mm, the total length is about 80 mm (about 1/4 wavelength of the center frequency of the GSM band); the first short metal portion 123 has a length of about 7 mm and a width of about 2 mm; the second radiating metal portion 131 is away from the ground plane. u about 7 mm 'the total length is about 4 〇 mm (about 1/4 wavelength of the center frequency of the DCS band); the second short metal portion 133 has a length of about 7 faces and a width of about 2 mm; the first feed metal The portion 142 has a length of about 7 faces and a width of about 2 mm; the second feed metal portion 152 has a length of about 7 mm and a height of 9 mm. ^ —
見沒η马2mm。由所得貫驗結果，在·6dB 反射係數的疋義下，其第_共振模態或較低操作頻帶^足 以涵蓋GSM頻帶（890〜960廳），而纟第二共振模態或較高操 作頻帶22足以涵蓋DCS _帶⑽。〜麵舰），而*隔離度Μ 方面’兩模態之隔離度皆小於-20 dB。 第3圖與第4圖為本發明妥綠 春^ , 口巧不、月天線一貝施例分別於925 與1795 MHz之輻射場型圖。由 田尸坏侍之結果，與傳統單極天See no η horse 2mm. From the obtained results, under the definition of ·6dB reflection coefficient, its _resonance mode or lower operating band ^ is enough to cover the GSM band (890~960 hall), and the second resonance mode or higher operation Band 22 is sufficient to cover DCS_band (10). ~ Face-to-ship), and * isolation Μ aspect 'the isolation of both modes is less than -20 dB. Fig. 3 and Fig. 4 are radiation pattern diagrams of the present invention in the form of chloroplasts, circumstance, and moon antennas, respectively, at 925 and 1795 MHz. The result of the corpse of the corpse, with the traditional unipolar days
其一端電氣連接至 二輻射金屬部 短路點112 。 200830636 線或倒F形天線共振於同一頻率時的輻射場 行動通訊產品的使用需求。 第5圖為本發明天線之第一其他實施例 施例5與實施例1的整體結構大致相同，惟 屬部121或是該第二輻射金屬部ι31之部分 接地面之一邊緣11〇 ，可以藉此降低天線之 (qualityfactor)，而增加天線之阻抗頻寬。此外 屬邛121與該第二輕射金屬部131係以印刷 成於一介質基板50上。 第6圖為本發明天線之第二其他實施例 施例6與實施例丨的整體結構大致相同，除 第一饋入信號組件14及第二饋入信號組件15 -第-天線62包含··一第一輻射金屬部 接地面11上方’大致平行於該接地面11，用 且具有一第一饋One end thereof is electrically connected to the second radiating metal portion short-circuit point 112. 200830636 The radiation field of a line or inverted-F antenna resonates at the same frequency. The use of mobile communication products. 5 is a first embodiment of the antenna according to the first embodiment of the present invention. The fifth embodiment is substantially the same as the first embodiment, and the edge portion 11 of the portion of the grounding surface of the second radiating metal portion ι31 is Thereby reducing the quality factor of the antenna and increasing the impedance bandwidth of the antenna. Further, the yoke 121 and the second light-emitting metal portion 131 are printed on a dielectric substrate 50. Figure 6 is a second embodiment of the antenna according to the second embodiment of the present invention. Embodiment 6 is substantially identical to the overall configuration of the embodiment, except that the first feed signal component 14 and the second feed signal component 15 - the first antenna 62 comprise a first radiating metal portion ground plane 11 is 'substantially parallel to the ground plane 11 and has a first feed
屬621 ’另一端電氣連接至該接地面11之 111 ，一第二天線63，其包含：一第二輻射 位於該接地面11上方，大致平行於該接地面 二天線之第二（較高）操作頻帶，且具有一 2 ，及一第二短路金屬部033 ，其一端電 631 ’另一端電氣連接至該接 所不同者，惟該第一輻射金屬 型相似，符合 結構圖。本實 該第一輻射金 區間突出於該 品質因素 該第一輻射金 或蝕刻技術形 結構圖。本實 了接地面11、 外，還包含： 621 ，位於該 於產生該天線 入點622 ;及 該第一輻射金 第一短路點 金屬部631 ， 11 ’用於產生 第二饋入點 氣連接至該第 地面11之第二 部621與該第 200830636 二輻射金屬部631呈現圓滑曲線之形狀’亦可達成與實施 例1之同樣功效。此外該第一輻射金屬部621與該第二輻 射金屬部631係以印刷或蝕刻技術形成於一介質基板6〇上 〇 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。 【圖式簡單說明】 第1圖為本發明天線之一實施例結構圖， 第2圖為本發明天線之一實施例之反射係數（Sii 、s22)及 隔離度（S21)量測結果， 第3圖為本發明天線一實施例於925 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圖為本發明天線之第一其他實施例結構圖， 第6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】 10 · ι •本發明天線一實施例 1Q’5Q’6():介質基板 11 . ^ t •接地面 12 200830636The other end is electrically connected to the ground plane 11 111, and a second antenna 63 includes: a second radiation is located above the ground plane 11 and is substantially parallel to the ground plane and the second antenna (higher) The operating frequency band has a 2, and a second shorting metal portion 033, the other end of which is electrically connected to the other end of the connection, but the first radiating metal type is similar to the structural diagram. The first radiation gold interval is highlighted by the quality factor of the first radiation gold or etching technique. The grounding surface 11 of the present invention further includes: 621 located at the antenna in point 622; and the first radiating gold first shorting point metal portion 631, 11 ' is used to generate the second feeding point gas connection The second portion 621 of the first floor 11 and the shape of the second radiating metal portion 631 of the 200830636 second rounded portion ′′ can also achieve the same effects as those of the first embodiment. In addition, the first radiating metal portion 621 and the second radiating metal portion 631 are formed on a dielectric substrate 6 by printing or etching techniques. The embodiments described in the above description are merely illustrative of the principles and effects of the present invention. It is 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 should be as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of an embodiment of an antenna according to the present invention, and FIG. 2 is a measurement result of a reflection coefficient (Sii, s22) and isolation (S21) of an embodiment of the antenna of the present invention, 3 is a radiation pattern diagram of an antenna according to an embodiment of the present invention at 925, FIG. 4 is a radiation pattern diagram of an antenna according to an embodiment of the present invention at 1795 MHz, and FIG. 5 is a structure of a first embodiment of the antenna of the present invention. Figure 6 is a structural view of a second embodiment of the antenna of the present invention. [Explanation of main component symbols] 10 · ι • Antenna embodiment of the present invention 1Q'5Q'6(): dielectric substrate 11 . ^ t • Ground plane 12 200830636
110 :接地面之一邊緣 111 :第一短路點 112 :第二短路點 12, 624 :第一天線 121，621 :第一輻射金屬部 122, 622 :第一饋入點 123 :第一短路金屬部 13, 630 :第二天線 131,631 :第二輻射金屬部 132, 632 :第二饋入點 133 :第二短路金屬部 14 :第一饋入信號組件 141 :第一饋入信號源 142 :第一饋入金屬部 150 :第二饋入信號組件 151 :第二饋入信號源 152 :第二饋入金屬部 21 :第一共振模態或較低操作頻帶 果） 22 :第二共振模態或較高操作頻帶 果） 23 :隔離度（S21量測結果） 反射係數Su量測結 反射係數S22量測結 13110: one edge of the ground plane 111: first short circuit point 112: second short circuit point 12, 624: first antenna 121, 621: first radiating metal portion 122, 622: first feed point 123: first short circuit Metal portion 13, 630: second antenna 131, 631: second radiating metal portion 132, 632: second feed point 133: second short metal portion 14: first feed signal component 141: first feed signal source 142 : first feed metal portion 150: second feed signal component 151: second feed signal source 152: second feed metal portion 21: first resonant mode or lower operating band) 22: second resonance Modal or higher operating band fruit) 23: Isolation (S21 measurement result) Reflection coefficient Su measurement junction reflection coefficient S22 measurement knot 13