201110465 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種天線’尤其涉及一種雙頻天線及應用該雙頻天線 之無線通訊裝置。 【先前技術】 在行動電話、個人數位助理(Personal Digital Assistant，PDA)等無 線通訊裝置中，天線作為其用來發射、接收無線電波以傳遞、交換無 線電訊號之部件，無疑是無線通訊裝置中最重要之元件之一。目前， •無線通訊裝置一般都需要具備在雙頻或者更多頻段下進行通訊之功 能，因此其天線裝置一般都使用雙頻或多頻天線。201110465 VI. Description of the Invention: [Technical Field] The present invention relates to an antenna', and more particularly to a dual-frequency antenna and a wireless communication device using the same. [Prior Art] In a wireless communication device such as a mobile phone or a personal digital assistant (PDA), an antenna is the most used in a wireless communication device as a component for transmitting and receiving radio waves to transmit and exchange radio signals. One of the important components. At present, wireless communication devices generally need to have the function of communicating in dual-frequency or more frequency bands, so antenna devices generally use dual-frequency or multi-frequency antennas.
請參閱圖1，一種習知之雙頻天線8〇包括一第一輻射臂82及一 第二輻射臂84 ’所述第一輻射臂82及第二輻射臂糾均為一長條型結 構並分別用於收發不同頻率之無線訊號。一般地，當二者長度分別設 置為需要收發之纖所對應之波長之1/4時，才能麟較好之輻射效 果。這樣’當該雙頻天線80帛於收發波長較長之低頻訊號時，往往需 籲要增大S ♦!射# 82及第二輕射臂Μ之尺寸。惟所述雙頻天線SO 所需佔狀找過大’不利於減小無線通魏置之體積及降低開發成 0 【發明内容】 有赛於此’私要提供—種佔職積較小且設贼本較低之雙頻 天線。 —種雙頻天線’其包括—第射體、-第二輻射體、-饋入端 及-接地端，所述雙頻天線為一倒F天線，所述第一輕射體、第二輕 射體、饋人端及接地倘騎坦片縣構，所述第—_體與第二輻 201110465 ’所述饋入端及接地端位於另一平面内 射體相連接並位於同一平面π 且均垂直連接於第一轄射體。 一種無線通訊裝置，is 直其包括一基體及一雙頻天線，所述基體 ==點人點，所述接地點及訊號叙點均與雙頻天線 幻相連_雙頻天線包括一第一輕射體、一第二練體、—饋入 端及接地端，所述雙頻天線為一倒F天線，所述第一輕射體二Referring to FIG. 1, a conventional dual-frequency antenna 8A includes a first radiating arm 82 and a second radiating arm 84'. The first radiating arm 82 and the second radiating arm are each a long strip structure and respectively Used to send and receive wireless signals of different frequencies. Generally, when the lengths of the two are respectively set to 1/4 of the wavelength corresponding to the fiber to be transmitted and received, the radiation effect of the better is obtained. Thus, when the dual-frequency antenna 80 is used to transmit and receive low-frequency signals with long wavelengths, it is often necessary to increase the size of the S ♦! #82 and the second light-arm Μ. However, the dual-frequency antenna SO needs to be oversized, which is not conducive to reducing the size of the wireless communication device and reducing the development to 0. [Inventive content] There is a game in this private offering. The thief has a lower dual-frequency antenna. a dual-frequency antenna that includes a first emitter, a second radiator, a feed end, and a ground. The dual-frequency antenna is an inverted-F antenna, and the first light body and the second light are The body, the feed end and the grounding are in the case of the riding of the film, the feeding end and the grounding end of the first body and the second end 201110465 are connected in another plane and are located in the same plane π and both Vertically connected to the first luminaire. A wireless communication device includes a base body and a dual-frequency antenna, the base body==pointing point, the grounding point and the signal counting point are connected to the dual-frequency antenna illusion_the dual-frequency antenna includes a first light a body, a second body, a feed end and a ground end, the dual frequency antenna is an inverted F antenna, and the first light body 2
輻射體、饋人端及接地綱為平坦片·構，所㈣-輻射體與第IThe radiator, the feed end and the grounding conductor are flat sheets and structures, and the (four)-radiators and the first
輻射體相連接並位於同-平酬，所述饋人端及接地端位於另一平面 内且均垂直連接於第—輕射體。 相較於習知技術，本發明所述之第一韓射體及第二輕射體均為平 坦之薄片體並设置於同—平面内，藉此有效地解決了習知技術中雙頻 天線安裝所需之較大_之_，有册絲通喊置之小型化 低了天線之設計開發成本。 【實施方式】 圖2及圖3所示為本發明較佳實施例之雙頻天線1〇〇，其可應用於行 鲁動電居、PDA等無線通訊裝置中。本實施例中，以一應用於行動電話 2〇〇 (請參閱圖4)之雙頻天線100為例加以說明。所述雙頻天線1〇〇設 於所述行動電話200内之一基體50上。所述基體5〇可為行動電話2〇〇之 印刷電路板(Printed Circuit Board，PCB)之一部分。 所述基體50大致為一長方體，其包括一端面52、一頂面54及一 側面56 ’所述端面52、頂面54及側面56兩兩相互垂直地設置。所述 側面56上可設置依照習知技術製造之一接地點（圖未示）及一訊號饋 入點（圖未示）’該接地點與基體50電性連接並為所述基體50提供接 地’該訊號饋入點與基體50電性連接並為所述基體50提供訊號饋入。 201110465 所述雙頻天線100為-平面倒F天線(planar J麵ted_F Me腿， PIFA) 4雙頻天線!⑻包括—天線本體1()、—接地端20及—饋入端％， 所述接地知>20及饋入端30均與所述天線本體1〇電性連接。 所述天線本體10包括一第一輻射體12及一第二輻射體14。所述第 輻射體12及第二輻射體μ均為平坦之金屬薄片體或導電材料塗層， 二者位於同-平面内且均_體5()之頂面54上，#此減少雙頻天 線1〇〇安I時需要之裝設m同時使雙頻天線励獲得妥善之支撑及 保護。 所述第一輻射體12大致呈“L”形，其平行地貼附於頂面54上，該第 一輻射體12包括一第一延伸段122及一第二延伸段124。所述第一延伸 •kl22 與頂面54鄰接端面52之邊緣重合，另一端向遠離端面52之方 向延伸，且该第一延伸段122之一側與頂面％鄰接側面56之邊緣相重 合。所述第二延伸段124垂直連接於第一延伸段122遠離52之一端，並 朝遠離側面56之方向延伸形成一長度小於第一延伸段122，寬度則與第 一延伸段122—致之矩形》 所述第二輻射體14包括皆呈矩形之一第一連接段142及一第二連 接#又144，二者遠離側面56之邊緣處於同一直線上，且第一連接段142 寬度大於第二連接段144寬度。該第一連接段142之一側連接於第一延 伸段122 ’相鄰一侧與頂面54鄰接端面52之邊緣相重合。所述第二連接 段144一端連接於第一連接段142遠離端面52之一側，另一端沿平行於 第一延伸段122之方向延伸，其長度略小於第一連接段142。在實際制 程中，所述第二連接段144之寬度與第一延伸段122之寬度及第二連接 段144與第一延伸段! 22之間之間距一般相等’對應地將第一連接段142 寬度設置為約為第二連接段144寬度之2倍。 201110465 ' 所述接地端2〇為平坦之金屬薄片體或導電材料塗層，其平行地貼 • 附於側面56上。該接地端20之一端垂直連接於所述第一延伸段122，另 一端向遠離頂面54之方向延伸，並且該接地端2〇之一側邊與端面52鄰 接侧面56之邊緣重合。該接地端20之寬度與第一延伸段122之寬度一 致，長度與基體50之厚度一致。該接地端2〇可與基體5〇上設置之接地 點電性連接而為所述雙頻天線1〇〇提供接地。 所述饋入i^30為平坦之金屬薄片體或導電材料塗層，其平行地貼 附於側面56上。該饋入端30之一端垂直於連接第一延伸段122靠近接地 端20之一端，另一端沿平行於接地端20之方向延伸。該饋入端3〇之寬 度與第一延伸段122之寬度一致，長度與接地端2〇一致，且該饋入端3〇 可與基體50上設置之訊號饋入點電性連接而為所述雙頻天線1〇〇提供 訊號饋入。 了以理解，所述天線本體之材料可選用銅、銀、導電油墨等， 其可以經由蝕刻或鍍覆等技術手段形成於基體5〇上。 經過實驗確定本實施例中雙頻天線100之一組較佳尺寸如下：第一 #延伸段122、第二延伸段124及第二連接段144之寬度均設置為約lmm， 長度刀別°又置為約20πιιη、2πιπι及3min。第一連接段142之寬产十支置為 約2mm ’長度設置為約4mm。所述接地端20及饋入端3〇之長度及寬度 均分別設置為約6mm及1mm，且該接地端20及饋入端3〇之間距設置為 約 2mm。 當所述雙頻天線100工作時，訊號自所述饋入端3〇進入後，分別形 成具有不同電氣長度之第一電流路徑及第二電流路徑，所述第一電流 路徑為從饋入端2〇經過所述第一延伸段122流向所述第二延伸段124 ; 所述第二電流路徑為從饋入端20經過所述第一連接段142流向第二連 201110465 接段144。當所述第一電流路徑及第二電流路徑分別與兩種不同頻率的 訊號的波長成特定比例（路徑的長度為1/4波長）時，所述第一輕射體 12及第二輻射體14可分別接收/發射兩種訊號’故本發明可工作在兩種 不同的頻段。由以上設計尺寸可以得出，在本實施例中’所述第一電 Su·路位長度約為29mm，弟一輕射體的共振頻率範圍約為 2.4GHz-2.5GHz，滿足藍牙(Bluetooth)訊號頻率的通訊要求；所述第二 電流路徑長度約為13mm，第二輻射體14的共振頻率範圍約為 5.4GHz-5.9GHz。故本發明所述的雙頻天線勘用於收 LAN IEEE 802，lla/b/g/n、WLAN等規格的訊號時均有較佳的效果。 天線增盈(Gain)是指在輸入功率相等的條件下，實際天線與理想的 輻射單元在空間同一點處所產生的訊號的功率密度之比。它定量地描 述一個天線把輸入功率集中輻射的程度。請參閱表一，由實驗測得本 發明較佳實施例所示的雙頻天線100的最大增益隨著工作頻率變化的 圖表可知，該雙頻天線1〇〇符合天線的設計要求。The radiators are connected and located at the same level, and the feed end and the ground end are located in another plane and are vertically connected to the first light body. Compared with the prior art, the first Korean body and the second light body of the present invention are flat sheets and are disposed in the same plane, thereby effectively solving the dual-frequency antenna in the prior art. The larger __ required for installation, the miniaturization of the book is less than the design and development cost of the antenna. [Embodiment] FIG. 2 and FIG. 3 show a dual-band antenna 1〇〇 according to a preferred embodiment of the present invention, which can be applied to a wireless communication device such as a mobile phone or a PDA. In the present embodiment, a dual-frequency antenna 100 applied to a mobile phone 2 (see Fig. 4) will be described as an example. The dual band antenna 1 is disposed on a base 50 of the mobile phone 200. The base 5 can be part of a printed circuit board (PCB) of the mobile phone. The base body 50 is substantially a rectangular parallelepiped, and includes an end surface 52, a top surface 54 and a side surface 56. The end surface 52, the top surface 54 and the side surface 56 are disposed perpendicularly to each other. The side surface 56 can be provided with a grounding point (not shown) and a signal feeding point (not shown) according to the prior art. The grounding point is electrically connected to the base 50 and provides grounding for the base 50. The signal feed point is electrically connected to the base 50 and provides signal feed to the base 50. 201110465 The dual-band antenna 100 is a -plane inverted F antenna (planar J-face ted_F Me leg, PIFA) 4 dual-band antenna! (8) includes - antenna body 1 (), - ground terminal 20 and - feed end %, Both the grounding > 20 and the feed end 30 are electrically connected to the antenna body 1A. The antenna body 10 includes a first radiator 12 and a second radiator 14 . The first radiator 12 and the second radiator μ are flat metal foil or conductive material coating, both of which are located in the same plane and on the top surface 54 of the body 5 (), which reduces the dual frequency When the antenna 1 is installed, it needs to be installed at the same time. At the same time, the dual-frequency antenna excitation is properly supported and protected. The first radiator 12 is substantially "L" shaped and attached to the top surface 54 in parallel. The first radiator 12 includes a first extension 122 and a second extension 124. The first extension kl22 coincides with the edge of the top surface 54 abutting the end surface 52, and the other end extends away from the end surface 52, and one side of the first extension 122 coincides with the edge of the top surface % abutting side surface 56. The second extending section 124 is perpendicularly connected to one end of the first extending section 122 away from the end of the first extending section 122 and extends away from the side surface 56 to form a rectangle having a length smaller than the first extending section 122 and having a width corresponding to the first extending section 122. The second radiator 14 includes a first connecting section 142 and a second connecting # 144 which are both in a rectangular shape, and the edges of the first connecting section 142 are on the same straight line, and the width of the first connecting section 142 is greater than the second. Connection segment 144 width. One side of the first connecting section 142 is connected to the adjacent side of the first extending section 122' and coincides with the edge of the top surface 54 abutting end surface 52. One end of the second connecting portion 144 is connected to one side of the first connecting portion 142 away from the end surface 52, and the other end extends in a direction parallel to the first extending portion 122, and the length thereof is slightly smaller than the first connecting portion 142. In the actual process, the width of the second connecting section 144 and the width of the first extending section 122 and the distance between the second connecting section 144 and the first extending section ! 22 are generally equal 'correspondingly the first connecting section 142 The width is set to be approximately twice the width of the second connecting section 144. 201110465 'The grounding end 2〇 is a flat sheet of metal or a coating of conductive material that is attached in parallel to the side 56. One end of the grounding end 20 is perpendicularly connected to the first extending section 122, and the other end extends away from the top surface 54, and one side of the grounding end 2〇 coincides with the edge of the end surface 52 adjacent to the side surface 56. The width of the ground terminal 20 is the same as the width of the first extension 122, and the length coincides with the thickness of the substrate 50. The grounding terminal 2 is electrically connected to a grounding point disposed on the base 5A to provide grounding for the dual-frequency antenna 1A. The feed i30 is a flat sheet of metal or a coating of electrically conductive material that is attached to the side 56 in parallel. One end of the feed end 30 is perpendicular to one end of the first extension 122 adjacent to the ground end 20, and the other end extends in a direction parallel to the ground end 20. The width of the feeding end 3〇 is the same as the width of the first extending portion 122, and the length is consistent with the grounding end 2〇, and the feeding end 3〇 can be electrically connected to the signal feeding point disposed on the base 50. The dual frequency antenna provides signal feed. It is understood that the material of the antenna body may be selected from copper, silver, conductive ink, etc., which may be formed on the substrate 5 by technical means such as etching or plating. It is experimentally determined that the preferred size of one of the dual-frequency antennas 100 in this embodiment is as follows: the widths of the first #extending segment 122, the second extending segment 124, and the second connecting segment 144 are all set to about 1 mm, and the length is different. Set to about 20πιηη, 2πιπι and 3min. The width of the first connection section 142 is set to about 2 mm and the length is set to about 4 mm. The length and width of the grounding end 20 and the feeding end 3〇 are respectively set to be about 6 mm and 1 mm, and the distance between the grounding end 20 and the feeding end 3〇 is set to be about 2 mm. When the dual-frequency antenna 100 is in operation, after the signal enters from the feeding end 3〇, a first current path and a second current path having different electrical lengths are respectively formed, and the first current path is from the feeding end. 2〇 flows through the first extension 122 to the second extension 124; the second current path flows from the feed end 20 through the first connection section 142 to the second connection 201110465 junction 144. When the first current path and the second current path are respectively proportional to the wavelength of the signals of the two different frequencies (the length of the path is 1/4 wavelength), the first light body 12 and the second radiator 14 can receive/transmit two signals separately', so the invention can work in two different frequency bands. It can be concluded from the above design dimensions that in the present embodiment, the first electric Su·road length is about 29 mm, and the resonant frequency range of the light-light body is about 2.4 GHz-2.5 GHz, which satisfies Bluetooth. The signal frequency communication requirement; the second current path length is about 13 mm, and the second radiator 14 has a resonance frequency range of about 5.4 GHz to 5.9 GHz. Therefore, the dual-frequency antenna of the present invention has a better effect when it is used to receive signals of IEEE IEEE 802, 11a/b/g/n, WLAN, and the like. Gain is the ratio of the power density of the signal generated by the actual antenna and the ideal radiating element at the same point in space under the condition of equal input power. It quantitatively describes the extent to which an antenna concentrates the input power. Referring to Table 1, it is experimentally determined that the maximum gain of the dual-band antenna 100 shown in the preferred embodiment of the present invention varies with the operating frequency, and the dual-frequency antenna 1〇〇 conforms to the design requirements of the antenna.
Frequency(MHz) 2400 2450 、八〆曰姐ΙΊ 2500 頻罕的 5400 變化 5600 Gain(dB) 3 3.1 3.5 3.6 3.5 | 一、、口 •行王脰册阿隹丞體50上，體積較 小’使得該雙頻天線不會佔_行動電話· _機構配置空間， 有利於行動電話200的薄形化。所述雙頻天線⑽成本較低，在工作 時可產生多個共振頻率，增加了所雙頻天線咖的頻寬，使得該雙頻 天線100的頻寬範圍可以涵蓋到多個通訊系統。 '综上所述，本發明符合發明專利要件，爰依法提出專利申請。惟， 以上所述者·本剌之雛#_，本㈣之範随不以上述實施 201110465 =限，舉凡_本崎藝之人士援依本發明之精神所作之等效修飾 ’交化’皆應涵蓋於町ψ請專利範肋。 乂 【圖式簡單說明】 示意圖； 圖1係習知之雙頻天線之結構示意圖；圖2係本發g維佳實麵之雙頻天線褒設在 無線通訊裝置基體 上之 a 3係本發·佳實施例之雙頻天線之立 圖4係本發明較佳實 ^圖， 【主要元件符魏明】’，、、線軌裝置之讀示意圖 100 天線本體 12 第一延伸段 124 第二輻射體 142 第二連接段 20 饋入蠕 50 端面 54 側面 80 第一輻射臂 84 行動電話 10 122 14 144 30 52 56 82 200 雙頻天線 第一輻射體 苐二延伸段 第一連接段 接地端 基體 頂面 雙頻天線 第二輻射臂Frequency(MHz) 2400 2450, gossip sister 2500 5500 change 5600 Gain (dB) 3 3.1 3.5 3.6 3.5 | I, mouth • Wang Wang book Aunt body 50, smaller size 'making The dual-band antenna does not occupy the _ mobile phone _ organization configuration space, which facilitates the thinning of the mobile phone 200. The dual-frequency antenna (10) has a low cost and can generate a plurality of resonant frequencies during operation, which increases the bandwidth of the dual-band antenna, so that the bandwidth of the dual-band antenna 100 can cover multiple communication systems. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above-mentioned person, Benedictine's chick #_, this (4) is not subject to the above-mentioned implementation of 201110465 = limit, the equivalent of the person of the akisaki art, according to the spirit of the invention, the equivalent modification 'crossing' Should be covered in the town, please patent ribs.乂 [Simple diagram of the diagram] Schematic diagram; Figure 1 is a schematic diagram of the structure of a conventional dual-frequency antenna; Figure 2 is a dual-frequency antenna of the present invention, which is provided on the base of the wireless communication device. 4 is a preferred embodiment of the dual-frequency antenna of the present invention, [main component Fu Weiming] ',, read view of the track device 100 antenna body 12 first extension 124 second radiator 142 Two connecting section 20 feeding creep 50 end face 54 side 80 first radiating arm 84 mobile phone 10 122 14 144 30 52 56 82 200 dual frequency antenna first radiator body second extension section first connecting section grounding end base top double frequency Antenna second radiating arm