1321374 九、發明說明： 【發明所屬之技術領域】 化之多頻天線。 【先前技術】 在現代化資訊社會中，各種無線通_ 語T字:息、數據、資料、 重要途狄-。存取這些以無線電錢攜餘 訊網路需要利用天線，因此， 〇 Μ''' ㈣MW * >天線的研發也成為現代資訊 廠=的重點之-。為了讓使用者能更方便地整合存取多種 ㈣的無線通賴路，較佳的天線輯應能以單一天線涵 盍不R無線通訊網路所要求的各種頻帶。另外，為了實現 更小體積、方便使用者隨身攜帶的無線通訊裝置，例如手 =:數位助理器(PDA)，天線的體積尺寸也應該要能 盡讀減’以將天線整合人可攜式的通訊裝置中。 在習知技術中，主要是以平面倒F天線（服，P1謙 Antenna)來作為無線通訊網路存取之天線。請 參考第1圖’第1圖為習知平面倒f天線⑺。平面倒F天 線10通¥係H平面輕射部12與—基板平面“協同激發 電磁波的震盪。另外’如中華民國發明公報公開號 200419843 (對應美國專利US693Q64g)所揭露者，亦為一 種平面倒F天線。不過，當天線1G要作為多頻天線應用時， f平面輪射部12需要佔敎尺寸的平面面積，而平面輕射 2 12與基板平面14之間的距離d〇,與天線的頻率以及頻 見有關，故也不能任意調整。因此，習知平面倒f天線ι〇 所佔用的體積無法有效縮減，難以適應小魏與多頻的要 【發明内容】 本發明係提供-種小型化之多頻天線，包含—連接部分設 置於第-表面，絲接受訊號饋人或饋出；_第—輻射部分， 3於—與該第—表面相交之第二表面，且連接於該連接部分， 二—細部分包含複數個分段；H射部分，設置於該第 :面’且連接於該連接部分’該第二輕射部分包含複數個分段， 八該第二輻射部分之一分段與該第一輕射部分之一分段平行且 談遠輕Γ ’以及―第三歸部分’設置於該第—表面，且連接於 、接。卜刀’該第三!|射部分與該第一輕射部分以及該第二輕射 分相互耦合。 【實施方式】 扣⑺參考第2圖以及第3圖，第2圖為本發明多頻天線 天、、之立體不意圖，第3圖為第2圖之天線2〇之上視圖。 八％、連接部分22、一第一輕射部分24、一第二輻射部 乃6以及—第三輻射部分28。連接部分22設置於一印刷電路板 1321374 . 30上，用來接受訊號的饋人或饋出。假設印刷電路板為一第一表 • 面S1，則第一輕射部分24以及第二輻射部分26設置於一與第一 表面S1垂直相交之第二表面S2，且第一輻射部分24以及第二輕 射部分26皆連接於連接部分22。第一輻射部分24以及第二韓射 部分26分別包含至少一個分段，其中第二輕射部分％之一分段 與第-輻射部分24之-分段平行且相互輕合。第三韓射部分π 設置於印刷電路板30上，也連接於連接部分22，並且與第一輻射 部分24以及第二輕射部分26相互鶴合。天線2〇之第一輻射部 • 分24以及第二輻射部分26採用1.0mm線寬的金屬扁平銅 條繞折成立體表面S2设§)·後，垂直設置於印刷電路板上， 用來作為天線20之主要幅射元件。在低頻率的頻帶部分， 例如 GSM ( Global System for Mobile communication) 850/900(824〜960MHz)的設計上，利用第二輻射部分26較 長的金屬扁平銅條激發出低頻帶所需的頻寬。另一方面， 在南頻率的頻帶部分*例如 • GSM1800/1900(1710〜1990MHz)、GPS(Global Positioning1321374 IX. Description of the invention: [Technical field to which the invention pertains] Multi-frequency antenna. [Prior Art] In the modern information society, various wireless communication words: interest, data, data, and important ways. Access to these radio-money-receiving networks requires the use of antennas. Therefore, the development of 〇 ' ''' (4) MW * > antennas has also become the focus of Hyundai Information Factory. In order to make it easier for users to integrate and access multiple (4) wireless communication channels, the preferred antenna assembly should be able to cover various frequency bands required by the R wireless communication network with a single antenna. In addition, in order to realize a wireless communication device that is smaller and more convenient for the user to carry around, such as a hand =: digital assistant (PDA), the size of the antenna should also be able to read and reduce 'to integrate the antenna with the portable one. In the communication device. In the prior art, a planar inverted-F antenna (P1, Antenna) is mainly used as an antenna for wireless communication network access. Please refer to Fig. 1 'Fig. 1 for a conventional planar inverted f antenna (7). The plane inverted F antenna 10 is connected to the H-plane light-emitting portion 12 and the substrate plane "co-excited to oscillate electromagnetic waves. In addition, as disclosed in the Republic of China Invention Gazette Publication No. 200419843 (corresponding to US Patent US 693Q64g), it is also a flat surface. F antenna. However, when the antenna 1G is to be used as a multi-frequency antenna, the f-plane rotator 12 needs to occupy a plane area of the , size, and the distance between the plane illuminator 2 12 and the substrate plane 14 d 〇 The frequency and the frequency are related, so it cannot be adjusted arbitrarily. Therefore, the volume occupied by the conventional planar inverted f antenna cannot be effectively reduced, and it is difficult to adapt to the small Wei and multi-frequency. [Invention] The present invention provides a miniaturization a multi-frequency antenna comprising: a connecting portion disposed on the first surface, the wire receiving a signal to feed or feed out; a first radiating portion, 3 being at a second surface intersecting the first surface, and connected to the connecting portion, The second-fine portion includes a plurality of segments; the H-shoot portion is disposed on the first surface: and is connected to the connecting portion. The second light-emitting portion includes a plurality of segments, and the second radiating portion A segment is parallel to one of the first light-emitting portions and is said to be far away and the third portion is disposed on the first surface, and is connected to and connected. The knife is the third! The portion is coupled to the first light-emitting portion and the second light-emitting portion. [Embodiment] The buckle (7) refers to FIG. 2 and FIG. 3, and FIG. 2 is a perspective view of the multi-frequency antenna of the present invention. Fig. 3 is a top view of the antenna 2A of Fig. 2. Eight percent, a connecting portion 22, a first light projecting portion 24, a second radiating portion 6 and a third radiating portion 28. The connecting portion 22 is provided at a printed circuit board 1321374 . 30 for receiving or feeding out a signal. Assuming that the printed circuit board is a first surface S1, the first light-emitting portion 24 and the second radiating portion 26 are disposed in a The first surface S1 vertically intersects the second surface S2, and the first radiating portion 24 and the second light projecting portion 26 are both connected to the connecting portion 22. The first radiating portion 24 and the second Korean portion 26 respectively comprise at least one segment. Where the second light-emitting portion % is segmented and the first-radiated portion 24 is segmented And the third Korean portion π is disposed on the printed circuit board 30, is also connected to the connecting portion 22, and is mutually coupled with the first radiating portion 24 and the second light-emitting portion 26. The antenna 2 A radiating portion • the minute portion 24 and the second radiating portion 26 are wound by a metal flat copper strip having a line width of 1.0 mm to form a body surface S2, and then vertically disposed on the printed circuit board to serve as a main frame of the antenna 20. In the low frequency band portion, such as the GSM (Global System for Mobile communication) 850/900 (824 to 960 MHz) design, the second radiating portion of the second radiating portion 26 is used to excite the low frequency band. The bandwidth. On the other hand, in the frequency band portion of the south frequency*, for example, GSM1800/1900 (1710 to 1990 MHz), GPS (Global Positioning)
System，1575 ± 1.1 MHz)的設計上，則是利用第一輻射部 分24較短的金屬扁平銅條激發出高頻帶所需的頻寬。此 外，設置於印刷電路板30上之第三輻射部分28，藉由連 接部分22與天線20之主要輻射元件相連接，作為幅射辅 助天線，可激發至更高的頻帶’例如WCDMA(Wide-band Code-Division Multiple Access)2100(1920〜2170MHz)。如第 3圖所示，藉由控制第三輻射部分28與第一輻射部分24System, 1575 ± 1.1 MHz) is designed to utilize the shorter flat metal strips of the first radiating portion 24 to excite the required bandwidth for the high frequency band. In addition, the third radiating portion 28 disposed on the printed circuit board 30 is connected to the main radiating element of the antenna 20 by the connecting portion 22 as a radiation auxiliary antenna, which can be excited to a higher frequency band 'WCDMA (Wide- Band Code-Division Multiple Access) 2100 (1920~2170MHz). As shown in FIG. 3, by controlling the third radiating portion 28 and the first radiating portion 24
8 1321374 以及第二輻射部分26之間的距離dl所產生的耦合效應， 可以耦合出高頻率部分超寬頻的效果，如此就能夠同時將 高頻GSM1800/1900與第三代通訊系統(3G)之WCDMA 2100頻帶整合於天線20上，達到小型化天線五頻之應用，甚至可 進一步整合GPS頻帶，成為小型化六頻天線。 請參考第4圖，第4圖為第2圖之天線20之前視圖。在實際 應用上，可利用一固定具32來固定第一輻射部分24以及第二輕 射部分26，此外，第4圖中也標示出第一轄射部分24以 及第二輻射部分26之大小，單位為毫米（mm)。固定具32 可使用介質材料製造，亦即不導電材料，例如塑膠材質。 固定具32上設有各種孔洞溝槽以配合第一輕射部分24以 及第二輻射部分26。當固定具32與第一輻射部分24以及 第二輻射部分26組裝在一起後，因為固定具32上可具有 卡榫、螺絲孔等構造，就能夠將第一輻射部分24以及第二 輻射部分26更穩固地安裝於印刷電路板30上。此外，固 定具32不僅可用來固定或保護第一輻射部分24以及第二 輻射部分26，也可用來支撐通訊裝置中的其它機構。固定 具32的材質可能會對天線20的特性有所影響，不過天線 20可藉由第一輻射部分24以及第二輻射部分26與第三輕 射部分28之間的距離dl來微調天線20特性，補償固定具 32的影響。反之，亦可透過固定具32之材質來調整天線20的特 性。 在上述實施例中’天線20主要是以壓條(stamp)之扁平金屬條 來繞折而成’然而亦可以使用均勻截面（圓截面）之導體 來形成天線20或是其它種類的導體來形成天線2〇。此外， 天線20可用單一導體一體成形，例如以均勻截面之金屬直 接繞折出連接部分22、第一輻射部分24以及第二輻射部 分26，而第三輻射部分28直接在印刷電路板3〇上形成，更 可節省加工的時間與成本。 請參考第5圖，第5圖為高頻輻射部分以及低頻輻射部分相 互耦合原理之示意圖。第5圖中，橫轴為頻率，縱軸為頻 域特性的大小’例如頻域特性常以電壓駐波比(Voltage Standing Wave Ratio, VSWR)來表示。電壓駐波比在頻域的 局部低點（local minimum)可代表一天線的可用頻帶，故電 壓駐波比常用來表現一天線的輻射特性，尤其是在頻域的 輻射特性。若僅考慮低頻輻射部分，天線的低頻輻射部分 會以較長的長度而在低頻頻帶（f0附近）激發出低頻的局 部低點（箭號A處，虛線表示）。同理，若僅有高頻輻射部 刀，天線則會因高頻輻射部分的較短長度而在頻率乜附近 的高頻頻帶激發出一局部低點（箭號c處，虛線表示）。一 般來說，此高頻頻帶的頻寬，難以用來同時支援不同的高 頻通訊工作頻帶需求(GPS或2G/3G的應用）。不過，本發 明天線20在低頻輻射部分與高頻輻射部分間建立較強的 1321374 相互搞合，而增進天線的整體特性。此相互搞合主要可引 發兩種效應，首先，低頻輻射部分或高頻輻射部分的4目互 揭合可促進低頻輻射部分的倍頻諧波(harmonic)輕合，在件 頻諧波處激發出一局部低點。低頻輻射部分的2倍頻譜波 可在頻率Π處形成另一局部低點（箭號B處，虛線表示）， 也就是頻率Π約為頻率仞之兩倍，可協助擴展高頻頻帶 的可用頻寬。此外’低頻或高頻輻射部分的相互輕合也可 在天線的不同分段間形成等效互耦或自耦的電感、電容， 而這些電感、電容效應可適當地降低天線的Q因子（Quality factor) ’使天線頻域特性的頻寬增加。q因子越高則頻寬 越小，故Q因子的降低就會在頻域反映為頻寬的增加。如 第5圖的實線曲線（箭號D)所示’由於本發明可利用相互輛 合來擴展頻寬’故在頻率fl、£2的局部低點就可因Q因子 減少而擴展，並相互結合，以在高頻合成一寬頻的可用頻 帶’足以支援各種不同的高頻無線通訊需求。 請參考第6圖，第6圖為第2圖之天線20之量測結果之示音、 圖。利用第2圖中的天線20架構設計，本發明天線可具體 實現出第6圖中的頻域特性，第6圖之橫軸為頻率，縱軸 則為電壓駐波比的大小。由第6圖中可知，本發明天線可 在低頻頻帶支援低頻之GSM85G/9()()，在高頻頻帶的寬頻帶 則可涵蓋GPS、GSM1800/1900以及WCDMA2l〇〇的所有 需求，以同一天線支援多種不同頻帶的無線通訊需求，實 11 1321374 現多頻天線之功能。另一方面，利用控制第3圖中第二輻 射部分28與第一輻射部分24以及第二輻射部分％之間= 距離dl所產生的耦合效應，可很容易地調整在高頻頻帶所 擴展出的寬廣頻寬，能完全支援GPS、GSM 1800/1900與 WCDMA2100的高頻頻帶。 綜上所述，有鏗於小型化多頻段天線與產品輕薄的需求，本 發明天線系統利用金屬扁平銅條作彎曲繞成一小面積幅射作為主 要天線，可提供GSM-850/900/1800/1900、GPS等多種不门 頻帶的應用，此外在印刷電路板上形成一長條的辅助天 線，可提供WCDMA-2100單頻帶的應用。透過這種配置方 式，主要天線與辅助天線所產生的耦合效應，能夠獲得所 需求的多頻帶的頻寬以及良好的幅射增益，以小型化天線 來廣泛支援多種高低不同頻帶之無線通訊的需求，符合第二 代以及第二代通訊系統(2G/3G)之多頻帶功能，並達到產品輕薄短 小美觀的雙重優點。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範 圍所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 【圖式簡單說明】 第1圖為習知平面倒F天線之示意圖。 第2圖為本發明多頻天線之立體示意圖。The coupling effect of the distance dl between the 8 1321374 and the second radiating portion 26 can be coupled to the effect of the ultra-wideband portion of the high-frequency portion, so that the high-frequency GSM1800/1900 and the third-generation communication system (3G) can be simultaneously The WCDMA 2100 band is integrated on the antenna 20 to achieve the application of miniaturized antenna five-frequency, and even further integrates the GPS band to become a miniaturized six-band antenna. Please refer to FIG. 4, which is a front view of the antenna 20 of FIG. 2. In practical applications, a fixture 32 can be used to fix the first radiating portion 24 and the second light projecting portion 26. Further, the size of the first radiating portion 24 and the second radiating portion 26 is also indicated in FIG. The unit is millimeter (mm). The fixture 32 can be made of a dielectric material, that is, a non-conductive material such as a plastic material. The holder 32 is provided with various hole grooves to fit the first light-emitting portion 24 and the second radiation portion 26. When the fixture 32 is assembled with the first radiating portion 24 and the second radiating portion 26, the first radiating portion 24 and the second radiating portion 26 can be provided because the fixture 32 can have a configuration of a latch, a screw hole or the like. It is more stably mounted on the printed circuit board 30. In addition, the fixture 32 can be used not only to secure or protect the first radiating portion 24 and the second radiating portion 26, but also to support other mechanisms in the communication device. The material of the fixture 32 may affect the characteristics of the antenna 20, but the antenna 20 may fine tune the characteristics of the antenna 20 by the distance dl between the first radiating portion 24 and the second radiating portion 26 and the third radiating portion 28. To compensate for the influence of the fixture 32. Conversely, the characteristics of the antenna 20 can also be adjusted by the material of the fixture 32. In the above embodiment, the antenna 20 is mainly wound by a flat metal strip of a stamper. However, a conductor having a uniform cross section (circular cross section) may be used to form the antenna 20 or other kinds of conductors to form an antenna. 2〇. Further, the antenna 20 may be integrally formed by a single conductor, for example, a metal having a uniform cross section directly wraps off the connecting portion 22, the first radiating portion 24, and the second radiating portion 26, and the third radiating portion 28 is directly on the printed circuit board 3 Forming, can save processing time and cost. Please refer to Figure 5, which is a schematic diagram of the principle of mutual coupling between the high-frequency radiating portion and the low-frequency radiating portion. In Fig. 5, the horizontal axis represents the frequency and the vertical axis represents the magnitude of the frequency domain characteristics. For example, the frequency domain characteristics are often expressed by a Voltage Standing Wave Ratio (VSWR). The local standing wave ratio of the voltage standing wave ratio in the frequency domain can represent the available frequency band of an antenna, so the voltage standing wave ratio is often used to express the radiation characteristics of an antenna, especially in the frequency domain. If only the low-frequency radiating portion is considered, the low-frequency radiating portion of the antenna excites a low-frequency local low point (indicated by arrow A, indicated by a broken line) in the low-frequency band (near f0) with a longer length. Similarly, if there is only a high-frequency radiation knife, the antenna will excite a local low point (arrow c, dashed line) in the high-frequency band near the frequency 因 due to the short length of the high-frequency radiation portion. In general, the bandwidth of this high-frequency band is difficult to support different high-frequency communication operating band requirements (GPS or 2G/3G applications). However, the antenna 20 of the present invention establishes a strong 1321374 between the low-frequency radiating portion and the high-frequency radiating portion to enhance the overall characteristics of the antenna. This mutual engagement can mainly lead to two effects. First, the four-eye mutual decoupling of the low-frequency radiating part or the high-frequency radiating part can promote the harmonic harmonic combination of the low-frequency radiating part, and excite in the component frequency harmonic. A partial low. The 2x spectral wave of the low-frequency radiating portion can form another local low point at the frequency ( (at the arrow B, indicated by the dotted line), that is, the frequency Π is about twice the frequency ,, which can help expand the available frequency of the high-frequency band. width. In addition, the mutual coupling of the low-frequency or high-frequency radiating parts can also form equivalent mutual coupling or auto-coupled inductance and capacitance between different segments of the antenna, and these inductance and capacitance effects can appropriately reduce the Q factor of the antenna (Quality Factor) ' Increases the bandwidth of the antenna's frequency domain characteristics. The higher the q factor, the smaller the bandwidth, so the decrease in the Q factor is reflected in the frequency domain as an increase in bandwidth. As shown by the solid curve (arrow D) in Fig. 5, 'the invention can use the mutual cooperation to expand the bandwidth', so the local low points of the frequencies fl and £2 can be expanded due to the decrease of the Q factor, and The combination of each other to synthesize a wide frequency band at high frequencies is sufficient to support a variety of different high frequency wireless communication needs. Please refer to Fig. 6. Fig. 6 is a sound and diagram of the measurement results of the antenna 20 of Fig. 2. With the antenna 20 architecture design in Fig. 2, the antenna of the present invention can realize the frequency domain characteristics in Fig. 6, the horizontal axis of Fig. 6 is the frequency, and the vertical axis is the magnitude of the voltage standing wave ratio. As can be seen from Fig. 6, the antenna of the present invention can support the low frequency GSM85G/9()() in the low frequency band, and the wide frequency band in the high frequency band can cover all the requirements of GPS, GSM1800/1900 and WCDMA2l. The antenna supports the wireless communication needs of many different frequency bands, and the function of the multi-frequency antenna is 11 1321374. On the other hand, by controlling the coupling effect between the second radiating portion 28 in Fig. 3 and the first radiating portion 24 and the second radiating portion % = distance d1, it can be easily adjusted to be expanded in the high frequency band. The wide bandwidth can fully support the high frequency bands of GPS, GSM 1800/1900 and WCDMA2100. In summary, contrary to the demand for miniaturized multi-band antennas and thin products, the antenna system of the present invention uses a metal flat copper strip for bending into a small area of radiation as a main antenna, and can provide GSM-850/900/1800/ Applications such as 1900, GPS, etc., in addition to forming a long auxiliary antenna on a printed circuit board, can provide WCDMA-2100 single-band applications. Through this configuration, the coupling effect between the main antenna and the auxiliary antenna can obtain the required multi-band bandwidth and good radiation gain, and miniaturize the antenna to widely support the wireless communication requirements of various high and low frequency bands. It meets the multi-band functions of the second-generation and second-generation communication systems (2G/3G) and achieves the dual advantages of light, thin, and beautiful appearance. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should fall within the scope of the present invention. [Simple Description of the Drawing] Fig. 1 is a schematic diagram of a conventional planar inverted-F antenna. 2 is a perspective view of a multi-frequency antenna of the present invention.
12 1321374 第3圖為第2圖之天線之上視圖。 第4圖為第2圖之天線之前視圖。 第5圖為高頻輻射部分以及低頻輻射部分相互耦合原理之 示意圖。 第6圖為第2圖之天線之量測結果之示意圖。 【主要元件符號說明】 10 天線 12 平面輻射部 14 基板平面 20 天線 22 連接部分 24 第一輻射部分 26 第二輻射部分 28 第三輻射部分 30 印刷電路板 S1 第一表面 S2 第二表面 32 固定具 1312 1321374 Figure 3 is a top view of the antenna of Figure 2. Figure 4 is a front view of the antenna of Figure 2. Fig. 5 is a schematic diagram showing the principle of mutual coupling of the high-frequency radiation portion and the low-frequency radiation portion. Figure 6 is a schematic diagram showing the measurement results of the antenna of Figure 2. [Main component symbol description] 10 Antenna 12 Planar radiating portion 14 Substrate plane 20 Antenna 22 Connecting portion 24 First radiating portion 26 Second radiating portion 28 Third radiating portion 30 Printed circuit board S1 First surface S2 Second surface 32 Fixing device 13