M243799 捌、新型說明： 【新型所屬之技術領域】 本創作係關於一種可抑制相互干擾的多天線裝置，尤 指一種可有效降低相鄰天線間經由基板上接地金屬層產生 干擾效應的多天線裝置。 【先前技術】 由於通訊科技發展快速，且使用成本日益降低的狀況 下’有愈來愈多的產品進行電子化，並結合3C技術，在 此狀況下’’將多頻帶與多系統整合於單一通訊裝置，已然 成為現在及未來通訊設備之發展趨勢。 而在同一裝置中整合多頻帶與多系統，意味著該裝置 上同時安裝有多個天線，此為收發不同頻帶/系統信號的 基本條件，然而，在同一裝置中同時安裝多組天線必須面 對的衝擊和挑戰是各天線之間的互相干擾，其將造成通訊 設備信號收發不良。故天線間相互干擾的問題勢必要先予 以排除。當單一裝置安裝的多組天線係屬於不同頻帶，以 手機為例，即有 GSM900(900MHz) 、 DCS1800(l800MHz)、 802· lib (2· 4GHz)與802. lla(5GHz)等分屬不同頻帶的通訊 協定，欲排除此種不同頻帶天線間的干擾問題，可簡單的 使用濾波Is將不需要之頻帶予以隔絕，即可解決干擾問題 。然而’ t多組天線均屬於同一頻帶時’例如無線網路應 用頻帶與藍芽頻帶皆為2.4GHz ’則使用遽波器仍無法達成 阻絕而避免相互干擾的目的。 收發信號之_合 一般而言，天線間的相互干擾係因其 所造成，而其耦合通常為下列兩種狀況 第-種狀況係如第五圖所示，該相鄰的天線（71) (7 2 )係藉由電磁波耦合。 第二種狀況則如第六圖所示’係因相鄰天線（7 i ) (7 2 )於共同的接地金屬（7 3 )上流動輻射電流所造 成0 針對第-種狀況所造成干擾的解決方法，其一係擴大 相鄰天線（7 1) (79) / 丄」之距離D(如第七圖所示）， 由於相鄰天線（7丄” 7 2 )的間距拉長，可避免電磁 波的直接耦合。其二係令相鄰天線（71) (72)的極 化方向互呈垂I (如第八圖所示），以避免二者收發信號 時相互干擾。 又針對則述第二種狀況的干擾解決方法，可如第九圖 所示，將天線（7 i ) ( 7 2 )間之接地金屬（7 3 )予 以斷開’而阻斷輻射電流的流動。 但在貫際應用時，既有通訊裝置在體積上均力求小巧 復在尺寸限制下，多使用單極天線（即電路板上的接地 為天線一部分），在此狀況下，天線間的距離不足，故無 法有效阻絕其電磁場的相互耦合，亦無法作垂直安裝。更 不此利用接地金屬之切割來達成。以一具體的應用實例加 以說明’如第十圖所示，假設將兩個2· 4GHz天線（7 1 ) (7 2)安裝在一個面積為4. 8xllcm2的PCMCIA卡電路板 (7 0 )上’此時兩天線（7 1 ) ( 7 2 )之絕緣度往往 M243799 小於15dB (請參閱第十一圖所示，圈註a處為絕緣度，圈 註B處為兩天線之反射係數），然而實際上可接受之絕緣 度必須大於25dB以上。由此可見，前揭所提的多種解決方 案，因安裝天線的裝置在尺寸上的限制，使其實施變得困 難，甚至不可能。 再如第十二圖所示，揭示有一種多天線裝置，其係在 一基板（80)的一面上形成有一接地金屬層（84)， 該接地金屬層（84)上端並未完全涵蓋基板（8〇)表 面’而使其端緣處呈一梯形狀，而在梯形端緣的三邊上分 別形成有一天線體（8 1 )〜（8 3 )，每一天線體（8 1 )〜（8 3 )並分別連接有一饋入線（8 1 〇 )〜（8 3 0 )’當饋入線（8 1 〇 )〜（8 3 0 )係由微帶線構 成時’其係位於基板（8 〇 )上相對於接地金屬層（8 4 )的另一表面。 以前述的多天線裝置係運用在無線網路卡上，其利用 二天線體（8 1 )〜（8 3 )進行信號之收發，主要係利 用其中的兩組天線體（8 1 ) ( 8 3 )接收信號，剩下的 一天線體（8 2 )則用來發射信號，如此的安排，可以省 下一個用來切換收發信號之開關而提高收訊品質。但由於 二組天線係安裝在一個尺寸約為5 X 11 cm2的無線網路卡上 ’因而各天線體（8 1 )〜（8 3 )間的間距很小，彼此 間的干擾造成天線特性產生很大的變異，如第十三圖所示 ’為前述多天線裝置中僅安裝一天線體時的特性曲線圖， 其天線頻帶（圖中以一l〇dB定義）為2370〜2500MHz，可以 M243799 涵盖無線網路卡所須的頻帶2400〜2483MHZ ;但同時安裝三 個天線體之後，因為相鄰天線間經由接地金屬層產生干'擾 效應，導致天線頻帶變為242〇〜剛驗（如第十四圖所示 在ti狀況下，已無法滿足無線網路卡的頻寬需求。 由上述可知，既有的多天線裝置在體積縮小的要求下 存在著多天線間容易引起干擾效應’進而造成頻帶改變 等問題，故有待進一步檢討，並謀求可行的解決方案 【新型内容】 Φ 因此，本創作主要目的在提供一種可有效抑制相鄰天 線間經由基板上接地金屬層引起干擾效應，進而有助於縮 小尺寸及碎保工作頻帶的多天線裝置。 為達成前述目的採取的主要技術手段係令前述多天線 裝置包括有： v 一基板’可由印刷電路板構成； 一接地金屬層，係形成在基板的其中一表面上； 一組以上的天線體，係形成於基板上，並與接地金屬 _ 層耦接； 一組以上的饋入線，係與對應的天線體連接；其中： 該接地金屬層於各相鄰天線體饋入線之間的相對位置 上分別形成剝離金屬層的線槽’利用該線槽隔絕干擾電流 ，以抑制在天線間引起的干擾效應。 前述饋入線係由微帶線構成，其位於基板上相對於接 地金屬層的另一表面上。 6 M243799 前述線槽可為孤線狀、T形狀或螺旋狀，其一端係位 於接地金屬層之端緣處，並向内延伸。 【實施方式】 如第一圖所示，係本創作一較佳實施例之平面示意圖 ’其包括有： 一基板（1 0 )，可由印刷電路板構成； 一接地金屬層（1 4 )，係形成在基板（i 〇 )的其 中一表面上，於本實施例中，該接地金屬層（i 4 )上端 緣係呈梯形狀，以構成三個連接邊； 一組以上的天線體（1 )〜（i 3 )，於本實施例 中係於基板（1 〇 )上形成三組天線體（1 1 )〜（工3 )，其分別相鄰於接地金屬層（1 4 )的三個連接邊上並 與其連接； 一組以上的饋入線（1 1 〇 )〜（1 3 0 )，係與對 應的天線體（1 1 )〜（i 3 )連接，於本實施例中，前 述饋入線（1 1 )〜（i 3 )係由微帶線構成，其位於基 板（1 0)上未設接地金屬層（丄4)的另一表面上；其 中： /、 該接地金屬層（i 〇 )於三個連接邊上的適當位置透 過剝離金屬層以分別向内延伸形成一線槽（丄4丄」（工 4 2 )，各線槽（工4工）（上4 2 )係分別對應於基板 (10)另面上各相鄰的饋入線（110)〜（13〇) 間。於本實施例中’該線槽（141)(142)係為一 M243799 直線狀，意即相鄰的饋入線（1 1 η、 / , 〇 ^ 、丄丄u ) ( 1 2 〇 )係由線 槽（1 4 1 )所隔絕，另對相鄰的饋入線（i 2 〇 )(、工 3 0 )則為另一線槽（1 4 2 )所隔絕。 利用則述剝離金屬層的線槽 其對應介於相鄰的饋入線（1 1 〇 )(丄2 〇 ) 0 ) ( 1 3 0 )間’當天線體（1 1 ) ( 1 3 )M243799 新型 Description of the new type: [Technical field to which the new type belongs] This creation relates to a multi-antenna device that can suppress mutual interference, especially a multi-antenna device that can effectively reduce the interference effect between adjacent antennas through the ground metal layer on the substrate. . [Previous technology] Due to the rapid development of communication technology and the decreasing cost of use, 'more and more products are being electronicized, and combined with 3C technology, in this situation `` integrate multiple frequency bands and multiple systems into a single Communication devices have become the development trend of current and future communication equipment. The integration of multiple frequency bands and multiple systems in the same device means that multiple antennas are installed on the device at the same time, which is the basic condition for transmitting and receiving signals of different frequency bands / systems. However, installing multiple antennas in the same device at the same time must face The impact and challenge are mutual interference between antennas, which will cause poor signal transmission and reception of communication equipment. Therefore, the problem of mutual interference between antennas must be eliminated in advance. When multiple groups of antennas installed in a single device belong to different frequency bands, taking mobile phones as examples, there are GSM900 (900MHz), DCS1800 (l800MHz), 802 · lib (2.4GHz), and 802.1la (5GHz). Communication protocol, if you want to eliminate the interference between antennas of different frequency bands, you can simply use filter Is to isolate the unnecessary frequency bands, and you can solve the interference problem. However, when 't multiple sets of antennas belong to the same frequency band', for example, the wireless network application frequency band and the Bluetooth band are both 2.4 GHz, the use of a wave filter still cannot achieve the purpose of blocking and avoiding mutual interference. In general, the mutual interference between antennas is caused by it, and its coupling is usually in the following two conditions. The first condition is shown in the fifth figure. The adjacent antenna (71) ( 7 2) is coupled by electromagnetic waves. The second situation, as shown in the sixth figure, is caused by the radiated current flowing from the adjacent antenna (7 i) (7 2) on the common ground metal (7 3). 0 For the interference caused by the first situation The solution is to increase the distance D between the adjacent antennas (7 1) (79) / 丄 ”(as shown in the seventh figure). As the distance between the adjacent antennas (7 丄 7 2) is extended, it can be avoided. Direct coupling of electromagnetic waves. The second is to make the polarization directions of adjacent antennas (71) (72) perpendicular to each other (as shown in Figure 8) to avoid mutual interference between the two when receiving and transmitting signals. For the interference solution of the two situations, as shown in the ninth figure, the ground metal (7 3) between the antennas (7 i) (7 2) can be disconnected 'to block the flow of radiated current. In the application, the existing communication devices strive to be small in size and complex. Under the size limitation, they often use monopole antennas (that is, the ground on the circuit board is part of the antenna). Under this condition, the distance between the antennas is insufficient, so it cannot be effective. It prevents the mutual coupling of electromagnetic fields and cannot be installed vertically. A specific application example will be used to illustrate it. As shown in the tenth figure, it is assumed that two 2.4 GHz antennas (7 1) (7 2) are installed on a PCMCIA card circuit board with an area of 4.8xllcm2 ( 7 0) on 'At this time, the insulation of the two antennas (7 1) (7 2) is often less than 15dB (see Figure 11). The circle a indicates the insulation and the circle B indicates the two antennas. Reflection coefficient), but the acceptable insulation must be greater than 25dB. Therefore, it can be seen that the multiple solutions mentioned in the previous disclosure, due to the size limitation of the antenna installation device, make its implementation difficult, or even difficult. Possibly, as shown in FIG. 12, a multi-antenna device is disclosed, which is formed with a ground metal layer (84) on one side of a substrate (80), and the upper end of the ground metal layer (84) does not completely cover The surface of the substrate (80) has a ladder shape at its end edge, and antenna bodies (81) to (83) are formed on three sides of the trapezoidal edge, and each antenna body (81) ~ (8 3) and are connected with a feed line (8 1 〇) ~ (8 3 0) 'When the feed line (8 1 〇) ~ (8 3 0) are composed of microstrip lines, which are located on the other surface of the substrate (80) opposite to the ground metal layer (8 4). The aforementioned multi-antenna device is used in wireless On the network card, it uses two antenna bodies (8 1) to (8 3) to transmit and receive signals. It mainly uses two sets of antenna bodies (8 1) (8 3) to receive signals, and the remaining one antenna body (8 2) is used to transmit signals. This arrangement can save a switch for switching the receiving and transmitting signals and improve the receiving quality. However, since the two sets of antennas are installed on a wireless network card with a size of about 5 X 11 cm2, the distance between the antenna bodies (8 1) to (8 3) is very small, and the interference between them results in antenna characteristics. Great variation, as shown in the thirteenth figure, is the characteristic curve when only one antenna body is installed in the aforementioned multi-antenna device. The antenna frequency band (defined by 10dB in the figure) is 2370 ~ 2500MHz, which can be M243799. Covers the frequency band required by the wireless network card 2400 ~ 2483MHZ; but after three antenna bodies are installed at the same time, the interference frequency band of the antenna becomes 242 ~~ As shown in Figure 14, under the condition of ti, the bandwidth requirement of the wireless network card can no longer be met. From the above, it can be known that the existing multi-antenna device has a multi-antenna interference effect which is easy to cause under the requirement of reduced size. Problems such as frequency band changes require further review and a feasible solution is sought [new content] Φ Therefore, the main purpose of this creation is to provide a method to effectively suppress the connection between adjacent antennas via the substrate The ground metal layer causes interference effects, which in turn contributes to reducing the size and the multi-antenna device of the broken operating frequency band. The main technical means adopted to achieve the foregoing purpose is that the aforementioned multi-antenna device includes: v A substrate may be composed of a printed circuit board ; A ground metal layer is formed on one surface of the substrate; more than one antenna body is formed on the substrate and is coupled to the ground metal layer; more than one feed line is connected to the corresponding antenna The ground metal layer respectively forms a wire groove of a stripped metal layer at the relative position between the feed lines of adjacent antenna bodies. The wire groove is used to isolate the interference current to suppress the interference effect caused between the antennas. The aforementioned feed line is composed of a microstrip line, which is located on the other surface of the substrate opposite to the ground metal layer. 6 M243799 The wire trunk can be solitary, T-shaped or spiral, and one end is located on the ground metal layer At the edge and extending inward. [Embodiment] As shown in the first figure, it is a schematic plan view of a preferred embodiment of the present invention, which includes: a base The board (1 0) may be composed of a printed circuit board; a ground metal layer (1 4) is formed on one surface of the substrate (i 〇). In this embodiment, the upper end of the ground metal layer (i 4) The edge system is in the shape of a ladder to form three connecting edges; one or more antenna bodies (1) to (i3), in this embodiment, three groups of antenna bodies (1 1) are formed on the substrate (10). ~ (工 3), which are respectively adjacent to and connected to the three connection edges of the ground metal layer (1 4); more than one set of feed lines (1 1 0) ~ (1 3 0), corresponding to The antenna bodies (1 1) to (i 3) are connected. In this embodiment, the aforementioned feed lines (1 1) to (i 3) are composed of microstrip lines, and the ground metal is not provided on the substrate (1 0). On the other surface of the layer (丄 4); where: /, the ground metal layer (i 〇) extends through the stripped metal layer at appropriate positions on the three connecting edges to form a wire groove (丄 4 丄 ″ ( 4 2), each trunking (4 workers) (up 4 2) corresponds to each of the adjacent feed lines (110) to (13) on the other surface of the substrate (10). In this embodiment, 'the trough (141) (142) is a M243799 straight line, which means that the adjacent feed lines (1 1 η, /, 〇 ^, 丄 丄 u) (1 2 〇) are formed by The trunking (1 4 1) is isolated, and the adjacent feed line (i 2 0) (, 30) is isolated from the other trunking (1 2 2). Use the wire groove for peeling the metal layer, which corresponds to the interval between the adjacent feed lines (1 1 0) (丄 2 0) 0) (1 3 0) 'when the antenna body (1 1) (1 3)
時，其激發在接地金屬層（14)的輕射電流將為線W …）（142)所隔絕（如第二圖所示），藉此可有 效避免在天線間引起干擾效應。同理，當饋入線q 2 〇 )送出訊號至天線體（i 2 )發射時，其激發在接地金屬 層（1 4 )的電流亦將受阻於線槽（i 4丄）（142) ’而有效防止其他兩饋人線（110) (13Q)受該電 流信號所干擾。根據前述多天線裝置設計所量測的特性曲 線係如第三圖所示’其頻帶係位力2400〜2550MHZ，相較於 減網路卡所須的2彻〜_MHz雖略有偏移，惟仍能完全 涵蓋其工作頻帶。 •至於前I㈣（141) (142)之形式可為各種 不同的形& ’除第-圖所示的弧線狀線槽外，亦可如第四 圖所π的τ形狀線槽、第四圖B所示的銘齒狀線槽及第 四圖C所不的螺旋狀線槽，其一端仍位於接地金屬層（1 4 )之立而、錢’並向内延伸，以有效構成隔絕干擾效應。 、由上述可知，本創作係於多天線裝置的接地金屬層上 形成剝離金屬居的綠播 蜀層的線槽，並使其對應位於各相鄰天線饋入 、線間，JM ^ 一At this time, the light emission current excited in the ground metal layer (14) will be isolated by the line W (...) (142) (as shown in the second figure), thereby effectively preventing interference effects between the antennas. Similarly, when the feed line q 2 〇) sends a signal to the antenna body (i 2) for transmission, the current excited in the ground metal layer (1 4) will also be blocked by the wire trunk (i 4 丄) (142) 'and Effectively prevent the other two feeders (110) (13Q) from being interfered by the current signal. The characteristic curve measured according to the aforementioned multi-antenna device design is as shown in the third figure. Its band frequency is 2400 ~ 2550MHZ, which is slightly offset compared to the 2 ~~ MHz required by the network card. Can still fully cover its operating frequency band. • As for the form of the former I) (141) (142), it can be of various shapes & 'in addition to the arc-shaped wire groove shown in the first figure, it can also be a τ-shaped wire groove as shown in the fourth figure, the fourth One end of the indented trough shown in Fig. B and the spiral trough not shown in Fig. C is still located on the ground metal layer (1 4) and extends inward to effectively isolate interference. effect. As can be seen from the above, this creation is formed on the ground metal layer of the multi-antenna device to form a green groove of the stripped metal layer, and make it correspondingly located between the adjacent antenna feeds and between the lines. JM ^ 1
’ 有效經由接地金屬層通過的干擾電流，藉此除 M243799 可有效確保 的工作頻;卜，》^ 4 I Μ > Λ… 亦利於多天線裝置的小型化， 由此可見，本創作相較於有 Μ掸；隹ο 刃夕天線4置已具備顯著的 力效曰進’並符合新型專利要件，爰依法提起申請。 【圖式簡單說明】 (一）圖式部分 第一圖：係本創作之平面圖。 第一圖：係本創作之線槽隔絕效果示意圖。 第三圖··係本創作之特性曲線圖。 第四圖Α〜C :係本創作各種不同線槽形狀之示意圖 第五圖·係同一裝置中兩相鄰天線電磁波耦合之示意 圖。 第六圖：係同一裝置中兩相鄰天線之輻射電流經接地 金屬耦合之示意圖。 第七圖··係一傳統解決相鄰天線電磁波耦合之方法示 ❿ 意圖。 . 第八圖·係又一傳統解決相鄰天線電磁波搞合之方法 示意圖。 第九圖：係再一傳統解決相鄰天線電磁波耦合之方法 示意圖。 第十圖：係習用多天線裝置運用在PCMCIA卡上之示意 圖。 第十一圖：係第十圖應用實施例之絕緣度特性曲線圖 9 0142 M243799 第十二圖：係另一種習用多天線裝置的平面圖。 第十三圖：係另一種習用多天線裝置僅安裝一天線時 之特性曲線圖。 第十四圖：係另一種習用多天線裝置同時安裝三天線 時之特性曲線圖。 (二）元件代表符號 (1 0 )基板 （1 1 )〜（1 3 )天線體 φ (1 4 )接地金屬層 （141) ( 1 4 2 )線槽 (1 1 0 )〜（1 3 0 )饋入線 (7 0 )電路板 （71) ( 7 2 )天線 (7 3 )接地金屬 （8 0 )基板 (8 1 )〜（8 3 )天線體 (810)〜（830)饋入線 (8 4 )接地金屬層 B143 10'' The interference current passed through the ground metal layer effectively, in addition to the working frequency that M243799 can effectively ensure; Bu,》 ^ 4 I Μ > Λ… It is also conducive to the miniaturization of multi-antenna devices, so it can be seen that compared with this creation Yu You M 掸; 隹 ο The 4th Blade Night Antenna has already achieved significant power efficiency and meets the requirements of new patents, and has filed an application in accordance with the law. [Schematic description] (A) Schematic part The first picture: a plan view of the creation. The first picture: This is a schematic diagram of the cable duct insulation effect of this creation. The third picture is the characteristic curve of this book. The fourth picture A ~ C: is a schematic diagram of various wire trunk shapes of this creation. The fifth picture is a schematic diagram of electromagnetic wave coupling between two adjacent antennas in the same device. Figure 6: Schematic diagram of the coupling of the radiated current of two adjacent antennas via the ground metal in the same device. The seventh picture shows the intention of a traditional method for solving electromagnetic wave coupling of adjacent antennas. Figure 8 is a schematic diagram of another traditional method for solving electromagnetic wave coupling of adjacent antennas. Figure 9: Schematic diagram of another traditional method for solving electromagnetic wave coupling of adjacent antennas. Figure 10: This is a schematic diagram of the conventional multi-antenna device used on a PCMCIA card. Figure 11: Insulation characteristic curve of the tenth application example 9 0142 M243799 Figure 12: Plan view of another conventional multi-antenna device. Figure 13: It is a characteristic curve diagram of another conventional multi-antenna device when only one antenna is installed. Figure 14: The characteristic curve when another conventional multi-antenna device is installed with three antennas at the same time. (2) Element representative symbols (1 0) Substrate (1 1) to (1 3) Antenna body φ (1 4) Ground metal layer (141) (1 4 2) Wire trunking (1 1 0) to (1 3 0 ) Feed line (7 0) Circuit board (71) (7 2) Antenna (7 3) Ground metal (80) Base plate (8 1) ~ (8 3) Antenna body (810) ~ (830) Feed line (8 4) Ground metal layer B143 10