九、發明說明： 【發明所屬之技術領域】 口口本發明係為-種槽孔天線，特別是一種雙饋入多頻 單極槽孔天線，適合應用於行動通訊產品上。 【先前技術】 •、隨著無線通訊科技的快速發展m相當多的技 、亍X及產ασ，使得揲線通訊已經漸漸融入現今人類的生 活當中，在現今產品中其天線元件性能的優劣將決定通 訊產品訊號傳輸與接收品質的好壞。台灣專利公告 1257,740號“供雙頻帶通信裝置用之雙頻帶内部天：：， 其揭示一種適用於行動通訊裝置之雙頻帶倒F形天線設 ，’但該天線設計使用―單饋人，於實際應㈣必須= 氣連接到-頻率切換電路，藉由此切換電路= 離出兩個不同之饋入訊號’再將各自的訊號連接至其： 端射頻晶片模組。但是此切換電路需佔H統電路板上 部分的空間，也會消耗部分功率使得輕射功率下降。 為有效解決此問題，我們提出-種具有雙饋入之夕 頻單極槽孔天線，利用其雙饋人之間具有高隔離度的^ 性’本天線設料需於天線饋人端後加人—切換電路， 即可直接將饋人線路連接至後端的射頻晶片模組， 本天線設計的有效操作頻寬亦可以涵蓋多個通訊頻 規格要求。此雙以之料方式可以去該切 糸統電路板上所佔的空間，進而降低整體的研發成本^ 1335104 可以減少天線功率的損耗，進而提高天線整 體的轄射功率。 【發明内容】 7所述，本發明之目的在於提供—種具有雙饋入的 :極槽孔天線。本項發明包含：-介質基板；-接 :面，位於該介質基板上’具有一第—側邊與一第二側 邊，且該第二側邊與該第-側邊相鄰或是相對；一第一 早極槽孔，位於該接地面上，具有—開路端與一終端， =路端位於該接地面U邊，而該終端則朝向該 接地面之内部延伸；—第二單極槽孔，位於該接地面之 ^並與該第-單極槽孔大致平行，且其長度小於該第 一早極槽孔之長度，具有—開路端與—終端，該開路端 立於该接地面之第一側邊’而該終端則朝向該接地面之 内部延伸；-第三單極槽孔，位於該接地面上，其長度 广於該第二單極槽孔之長度，具有—開路端與一終端， =開路端位於該接地面之第：側邊，而該終端則朝向該 接地面之内部延伸；—第―饋人錢線，用於串聯激發 :弟-單極槽孔與該第二單極槽孔，產生一第一操作頻 π與-第=操作頻帶，且該第—饋人信號線之—端電氣 3接f"第一尨嬈源；及第二饋入信號線，用於激發該 第二單極槽孔，產生一第二極你相册—始 ^ 弟一切作頻π，泫苐二饋入信號 、泉穿過㈣三單極槽孔之位置不在該第三單極槽孔之開 口處’以能夠容易調整其操作模態之阻抗匹配，且該第 6 1335104 一饋入信號線之一端電氣連接至一第二信號源。 在本項設計中，藉由單極槽孔可共振出接近四分 之一波長的共振模態，與共振於二分之—波長的傳紙槽 孔相比，其所需尺寸較小並能有較大的操作頻寬。並且 利用-饋人信號線串聯激發兩個長度接近的單極槽孔， 使巧生兩個㈣的共振頻帶合成一寬頻_ (較‘）操 作模心而另一饋入信號線激發一長度較短的單極槽孔 :。可得到-寬頻的（較高）操作模態。另外，兩個； 信號源各自所激發的單極槽孔其擺放位置大致為相互垂 直因此兩個饋入k號源對於彼此的干擾大幅降低，使 得兩個饋入信號源間能有高隔離度（小於_l5dB)的表 現。因此本天線設計可以達成適用於GSM85〇 (824〜 894 GHz) / GSM900 (890 〜960 MHz) / DCS (1710 〜1880 MHz) / PCS (1850 〜1990 MHz) / UMTS (1710 〜2170 MHz)頻帶之操 作同日守本天線結構簡單、容易調整，且可直接印刷或 敍刻於介質基板上，具有節省製造成本之優點。 【實施方式】 參考第1圖為本發明之單極槽孔天線一實施例 1 ，該天線1包含：一介質基板u、一接地面12、一第 單極槽孔13、一第二單極槽孔丨4、一第三單極槽孔 15、一第一饋入信號線16及一第二饋入信號線丨7。其中 。亥"貝基板11為一行動通訊裝置之系統電路板，而該接 地面12係以印刷或蝕刻的方式形成於該介質基板u上。 7 1335104 又該接地面12具有-第一側4 121及一第二側邊 =該第二側邊丨22與該第一側邊⑵相對 極 ^⑶位於該接地面丨2上，具有—開路端與終端，= 該接地面12之第—側邊121 ’而該終端則朝^ 遠接地面12之内部延伸。而該第二單極槽孔⑷立於該接 地面12上’亚與該第—單極槽孔13大致平行，其長戶小 於該第一單極槽孔13之長度，具有—開路端與終端Γ該 開路端位於該接地面12之第一側邊丨2丨，而該終端則朝 向該接地面12之内部延伸。該第三單極槽孔15亦位於該 接地面12上，其長度小於該第二單極槽孔14之長度，具 有一開路端與終端，該開路端位於該接地面之第二側邊 122 ，而§亥終端則朝向該接地面之内部延伸，另外該第 三單極槽孔15具有至少一次彎折使其在該接地面丨2所佔 面積減小。該第一饋入信號線16用於串聯激發該第一單 極槽孔13與第二單極槽孔14，產生一第一操作頻帶21與 一第二操作頻帶22，且該第一饋入信號線16之一端電氣 連接至一第一饋入信號源161 。而該第二饋入信號線17 用於激發該第三單極槽孔15，產生一第三操作頻帶23， 該第二饋入信號線Π穿過該第三單極槽孔15之位置不在 該第三單極槽孔丨5之開口處，且該第二饋入信號線17之 一端電氣連接至一第二饋入信號源171 。 第2圖為本發明天線一實施例1之反射係數 (sn 、S22)及隔離度量測結果。在本實施例1中， 其接地面11之長度約為100 mm、寬度約為60 mm ，天線 8 1335104 位於接地面11之上方區間，其所佔面積約為6〇χΐ4 mm ，主要包含一第一單極槽孔丨3、一第二單極槽孔14 及第二單極槽孔15，且本天線設計係以印刷或蝕刻技 術與接地面11同時形成於一厚度為08mm的FR4介質基 板10之上；該第一單極槽孔13之長度約為49 mm、寬度 約為2mm ;該第二單極槽孔丨4之長度約為43mm、寬^ 約為2 mm ;該第三單極槽孔15之長度約為ι7⑺爪、寬度 約為5mm。本實施例丨具有三個共振模態：一第一操二 頻γ 21、一第二操作頻帶22及一第三操作頻帶23。該第 一操作頻帶21與該第二操作頻帶22合成一寬頻頻帶，約 有250 MHz (795〜1045 MHz)的操作頻寬，可以同時涵蓋 GSM850及GSM900頻帶，且在需求頻帶（824〜96〇mHz) 内的返回損失皆有高於6 dB的表現；而該第三操作頻帶 23之操作頻寬約有475MHz(丨700〜2175MHz)，可以同時 涵蓋DCS頻帶、PCS頻帶及UMTS頻帶，在所需的頻= 範圍（Π10〜217()MHz)内的返回損失值亦皆高於⑽的表 現。另外在隔離度24方面，其隔離度在所需頻帶範圍内 均小於-15dB ，已能夠符合實際應用要求。 第3圖及第4圖各為本發明天線一實施例丨於 860 MHz肖925 MHz之轄射場型圖。由所得之結果，天 線卜操作頻帶21與第二操作頻帶22之㈣場型與傳統 内藏式平板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】於咖 MHz 1990 MHz卩2045 MHz《輕射場型圖。由所得之妗 9 1335104 果’天線第三操作頻帶23内不同頻率之轄射場型皆相當 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並他實 施例及第二其他實施例。第-實施例8和實施例;、的整 體結構大致上均相同，唯第一實施例8之第一單極槽孔 83及第，單極槽孔84經由至少一次彎折而形成一倒l 形。而第二實施例9亦和實施例丨的整體結構大致上相 同’唯其第三單極槽孔95之開路端位於該接地面丨2之第 二側邊922上，且該第二側邊922與該第一側邊121相 鄰’又該第三單極槽孔95大致為—倒[形。上述說明的 兩個其他實施例8、9皆可順利激發出三個共振模態， 並能夠達到與實施例1相似的操作特性。 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 不這月本龟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。 【圖式簡單說明】 第1圖為本發明天線一實施例結構圖。 第2圖為本發明天線之一實施例之反射係數、I，）及 隔離度（S21)量測結果。 ^ 3圖為本發明天線—實施例於·塗之輕射場型圖。 f 4圖為本發明天線一實施例於925 MHz之輕射場型圖。 弟5圖為本發明天線一實施例於1795 MHz之輻射場型圖。 1335104 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 12 :行動通訊裝置之系統接地面 121 .糸統接地面之第一側邊 122 :系統接地面之第二側邊 13 .第一單極槽孔 14 :第二單極槽孔 15 .第三單極槽孔 16 :第一饋入信號線 161 :第一信號源 17 :第二饋入信號線 171 :第二信號源 21 :第一操作頻帶（反射係數Sn量測結果） 22 .弟一Ί呆作頻帶（反射係數S11 f測結果） 23 .弟二柄作頻帶（反射係數S〗2里測結果） 24 :隔離度（反射係數s21量測結果） 83 :第一單極槽孔 84 :第二單極槽孔 1335104 922 :系統接地面之第二側邊 95 :第三單極槽孔Nine, the invention: [Technical field of the invention] The invention is a slot antenna, in particular a dual-feed multi-frequency single-pole slot antenna, suitable for use in mobile communication products. [Prior technology] • With the rapid development of wireless communication technology, a lot of technology, X and ασ have made the communication of the wireless line gradually integrated into the life of today's human beings. The performance of its antenna components in today's products will be Determine the quality of communication product transmission and reception. Taiwan Patent Publication No. 1257,740 "Double-band internal antenna for dual-band communication devices::, which discloses a dual-band inverted-F antenna configuration suitable for mobile communication devices, 'but the antenna design uses a single-feeder, In practice, (4) must be = gas connected to the -frequency switching circuit, whereby the switching circuit = separate two different feed signals' and then connect their respective signals to their: RF chip module. But this switching circuit needs Part of the space on the circuit board of the H system will also consume part of the power to reduce the light power. To solve this problem effectively, we propose a kind of single-frequency slot antenna with dual feed, using its doubly-fed The high-isolation ratio of the antenna needs to be added to the antenna feed end-switching circuit, which can directly connect the feeder line to the RF chip module at the back end. The effective operation bandwidth of the antenna design. It can also cover multiple communication frequency specifications. This dual-material mode can go to the space occupied by the circuit board, thus reducing the overall R&D cost. 1335104 can reduce the loss of antenna power. Further, the power of the entire antenna is increased. [Invention] The object of the present invention is to provide a pole slot antenna with dual feed. The present invention comprises: - a dielectric substrate; Having a first side and a second side on the dielectric substrate, and the second side is adjacent or opposite to the first side; a first early pole slot is located at the ground plane Upper, having an open end and a terminal, = the end of the road is located at the side of the ground plane U, and the terminal extends toward the inside of the ground plane; the second monopole slot is located at the ground plane The monopole slot is substantially parallel and has a length less than the length of the first early pole slot, having an open end and a terminal, the open end standing on the first side of the ground plane and the terminal is oriented toward the The internal extension of the ground plane; the third monopole slot is located on the ground plane, and the length thereof is wider than the length of the second monopole slot, having an open end and a terminal, and the open end is located at the ground plane No.: the side, and the terminal extends toward the inside of the ground plane; Feeding the money line for series excitation: the dipole-monopole slot and the second monopole slot, generating a first operating frequency π and - the = operating band, and the first-feeder signal line Electrical 3 is connected to f" first source; and second feed signal line is used to excite the second monopole slot, and generate a second pole of your album - the beginning of the brother all the frequency π, 泫苐 馈The input signal, the spring passes through (four) the position of the three monopole slots is not at the opening of the third monopole slot, so that the impedance matching of the operating mode can be easily adjusted, and the 6th 1335104 feeds one end of the signal line Electrically connected to a second signal source. In this design, the unipolar slot can resonate to a resonance mode close to a quarter wavelength, compared to a paper slot that resonates to a two-minute wavelength. The required size is small and can have a large operating bandwidth, and the two-channel slots of the length are closely excited by the -feeding signal line, so that the resonant frequency bands of the two (four) are combined to form a broadband _ ') Operates the core while the other feed signal line excites a shorter length monopole slot: A wide (higher) operating mode is available. In addition, two; the single-pole slots excited by the signal sources are placed substantially perpendicular to each other, so the interference of the two feed k-sources to each other is greatly reduced, so that there is high isolation between the two feed signal sources. Degree (less than _l5dB) performance. Therefore, this antenna design can be achieved for GSM85〇 (824~894 GHz) / GSM900 (890 ~ 960 MHz) / DCS (1710 ~ 1880 MHz) / PCS (1850 ~ 1990 MHz) / UMTS (1710 ~ 2170 MHz) band The operation of the antenna on the same day is simple and easy to adjust, and can be directly printed or engraved on the dielectric substrate, which has the advantages of saving manufacturing cost. Embodiment 1 Referring to FIG. 1 is a first embodiment of a monopole slot antenna according to the present invention. The antenna 1 includes a dielectric substrate u, a ground plane 12, a first pole slot 13 and a second monopole. The slot 丨4, a third monopole slot 15, a first feed signal line 16 and a second feed signal line 丨7. among them . The board's substrate 11 is a system board of a mobile communication device, and the ground 12 is formed on the medium substrate u by printing or etching. 7 1335104 The grounding surface 12 has a first side 4 121 and a second side = the second side 丨 22 and the first side (2) opposite pole (3) are located on the grounding surface 丨 2, having an open circuit The terminal and the terminal, = the first side 121' of the ground plane 12, and the terminal extends toward the inside of the remote ground plane 12. The second monopole slot (4) is located on the ground plane 12 and is substantially parallel to the first-pole slot 13 and has a length smaller than the length of the first monopole slot 13 and has an open end and The open end of the terminal is located at a first side of the ground plane 12, and the terminal extends toward the inside of the ground plane 12. The third monopole slot 15 is also located on the ground plane 12, and has a length smaller than the length of the second monopole slot 14 and has an open end and a terminal. The open end is located at the second side 122 of the ground plane. And the third terminal extends toward the interior of the ground plane, and the third monopole slot 15 has at least one bend to reduce the area occupied by the ground plane 丨2. The first feed signal line 16 is used for exciting the first monopole slot 13 and the second monopole slot 14 in series to generate a first operating band 21 and a second operating band 22, and the first feeding One end of the signal line 16 is electrically connected to a first feed signal source 161. The second feed signal line 17 is used to excite the third monopole slot 15 to generate a third operating frequency band 23, and the second feed signal line Π passes through the third monopole slot 15 The opening of the third monopole slot 丨5, and one end of the second feed signal line 17 is electrically connected to a second feed signal source 171. Fig. 2 is a graph showing the reflection coefficients (sn, S22) and the isolation measurement results of the antenna of the first embodiment of the present invention. In the first embodiment, the grounding surface 11 has a length of about 100 mm and a width of about 60 mm, and the antenna 8 1335104 is located above the grounding surface 11 and has an area of about 6〇χΐ4 mm, which mainly includes a first a single-pole slot 3, a second monopole slot 14 and a second monopole slot 15, and the antenna design is formed on the FR4 dielectric substrate having a thickness of 08 mm by a printing or etching technique simultaneously with the ground plane 11. 10; the first monopole slot 13 has a length of about 49 mm and a width of about 2 mm; the second monopole slot 4 has a length of about 43 mm and a width of about 2 mm; The pole slot 15 has a length of approximately ι 7 (7) and a width of approximately 5 mm. The present embodiment has three resonant modes: a first operational frequency γ 21, a second operational frequency band 22, and a third operational frequency band 23. The first operating band 21 and the second operating band 22 are combined into a wide frequency band, and have an operating bandwidth of about 250 MHz (795 to 1045 MHz), which can cover both the GSM850 and GSM900 bands, and in the required frequency band (824 to 96 〇). The return loss in mHz) has a performance higher than 6 dB; and the operating bandwidth of the third operating band 23 is about 475 MHz (丨700~2175 MHz), which can cover both the DCS band, the PCS band and the UMTS band. The return loss value in the required frequency = range (Π10~217()MHz) is also higher than the performance of (10). In addition, in terms of isolation 24, the isolation is less than -15dB in the required frequency band, which can meet the practical application requirements. Fig. 3 and Fig. 4 are each a view of an embodiment of an antenna according to the present invention, which is shown in Fig. 860 MHz. As a result of the obtained, the (4) field type of the antenna operating band 21 and the second operating band 22 is similar to the radiation pattern of the conventional built-in panel antenna at the same frequency. The fifth to seventh figures are respectively an embodiment of the antenna of the present invention. The light field pattern is shown in the coffee MHz MHz MHz MHz 2045 MHz. From the obtained 妗 9 1335104, the antennas of different frequencies in the third operating band 23 of the antenna are quite similar, and are suitable for the application of mobile communication devices. Figures 8 and 9 are the first and other embodiments of the antenna of the present invention, respectively. The overall structure of the first embodiment and the embodiment is substantially the same, and only the first single-pole slot 83 and the first-pole slot 84 of the first embodiment 8 are formed by at least one bending. shape. The second embodiment 9 is substantially the same as the overall structure of the embodiment ' 'only the open end of the third monopole slot 95 is located on the second side 922 of the ground plane 丨 2, and the second side 922 is adjacent to the first side 121. The third monopole slot 95 is substantially inverted. Both of the other embodiments 8 and 9 described above can smoothly excite three resonance modes and can achieve operational characteristics similar to those of the first 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 modify and change the above embodiments without the spirit of the present. The scope of the invention is set forth in the appended claims. BRIEF 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 measurement result of reflection coefficient, I, and isolation (S21) of one embodiment of the antenna of the present invention. ^ 3 is a light field pattern of the antenna of the present invention - the embodiment. Figure 4 is a light shot field 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 MHz. 1335104 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. [Description of main component symbols] I: Antenna of the present invention: II: dielectric substrate 12: system ground plane 121 of the mobile communication device. First side 122 of the ground plane of the system: second side 13 of the system ground plane. The first monopole slot 14 is a second monopole slot 15. The third monopole slot 16 is: a first feed signal line 161: a first signal source 17: a second feed signal line 171: a second signal source 21: The first operating frequency band (reflection coefficient Sn measurement result) 22. The younger one is the frequency band (reflection coefficient S11 f measurement result) 23. The second handle is the frequency band (reflection coefficient S> 2 measurement result) 24: Isolation Degree (reflection coefficient s21 measurement result) 83: first monopole slot 84: second monopole slot 1335104 922: second side of system ground plane 95: third monopole slot