M331199 八、新型說明： 【新型所屬之技術領域】 本創作係有關於一種寬頻偶極天線，尤指一種運用一接 地輻射體與一訊號輻射體相隔一預設距離，令其交互間產生 電磁耦合效應(Mutual coupling)達到增加該天線之頻寬者。 【先前技術】 '近年來消費性電子產品無線應用的需求不斷增加，於現 .今市面上所對應之無線通訊產品_，大部分均是在一裝設有 諸多用以產生無線訊號之電子電路的系統電路板上，配置一 天線裝置，以提供於一定頻帶内之無線通訊或是網際網路之 功能。於該天線裝置上則設計有特定形狀與長度之輻射導 艘，以適於增強預定頻率之無線訊號的發射或接收能力。 寬頻無線通訊技術無論是在軍事、民間或是個人用途 上，都有愈來愈廣泛的應用。未來寬頻無線通訊所運用的範 園，則是傾向在所有的電子裝置上均附加無線通訊的功能。 ’ 树如··無線滑鼠、無線鍵盤、無線區域網路裝置等電腦週邊 装置，或是手機、具手機功能之個人數位助理（pDA)、藍芽 耳機、藍芽MP3等個人消費性資訊產品等等。偶極天線(Dip〇le Antenna)重量輕、效率高、架設簡單，可提供GSM、Bluetooth 及IEEE 802.11 a/b/g#多頻段領域應用，係無線傳輸系統的 最佳介面與溝通橋襟之一。 請參閱圖-所示，圖-為習知天線示意圖。如圖一所示， 該習知天線10係包括：一輻射導體u、一接地面12、一傳 5 M331199 輸線13、以及一訊號源14。該接地面12上設有一凹槽i2i， 於該凹槽121内設置該輻射導體u，且該輻射導體u與該凹 槽121之間距離-適當間隙，該訊號源M透過該傳輸線U 與該輻射導體11以及該接地面12做電性連接。 該接地面12之凹槽121係將該輻射導體u包圍，利用 該輕射導體11與該凹槽121之預設赚交互產生電磁轉合效 應’其頻寬僅侷限於某-頻帶之内，且無法適用於較高頻率 之無線傳輸，更於高頻率波段（例如4GHz以上時）進行傳 输時容易產生波束角度向下傾斜之偏移，造成傳輸面積產生 死角，致使傳輸效率大打折扣。 【新型内容】 本創作之第一目的，在於提供一種寬頻偶極天線，係運 用一接地輻射體與該訊號輻射體產生電磁耦合效應，以提供 較寬之頻帶者。 本創作之第二目的，在於提供一種寬頻偶極天線，其可 藉該接地輕射體之第二開口來改善該天線於高頻率時所產生 之波束角度偏移。 為達上述之目的，本創作一種寬頻偶極天線，其包括有： 一接地輻射體、一訊號輻射體、一訊號源、以及一傳輸線。 該接地轄射體係為一水平體其兩端分別連接一垂直體所構 成，並因此在水平體上下兩側分別形成一第一開口以及一第 二開口 ’而大體上於外觀上構成一 Η形之接地輻射體。該訊 號無射體至少有一部份係位於該第一開口中央位置處，其部 M331199 分被該接地輻射體兩侧之垂直體所包圍。該傳輸線一端與該 接地輻射體以及該訊號輻射體分別相連接，另一端則與該訊 號源相連接。該接地輻射體與該訊號輻射體係間隔一預設距 離且不相接觸’其兩者交互間產生電磁编合效應(Mutual coupling)者 〇 【實施方式】 為了能更清楚地描述本創作所提出之寬頻偶極天線，以 下將配合圖示詳細說明之。 請參閱圖二所示，圖二為本創作之寬頻偶極天線第一較 佳實施例立體示意圖。如圖二所示之本第一較佳實施例中， 该寬頻偶極天線20係包括有：一接地輻射體21、一訊號輻射 體22、一訊號源23、以及一傳輸線24。 該接地輻射體21係為電性接地（GND)，其利用一水平 艘211兩端分別連接一垂直體212、212’所構成，並在水平體 211的上、下方分別形成有：一第一開口 213、以及一第二開 口 214，而大體上於外觀上構成一 Η形之接地輻射體。該水 乎體211與兩垂直體212、212’配合構成上下且獨立之該第一 開口 213以及該第二開口 214。於本創作第一較佳實施例中， 該第二開口 214之深度D2係大於或等於該第一開口 213之深 度D1。該接地輻射體21可以是導電材質所構成之扁平板元 件或是金屬板將該水平體211以及其兩端所分別連接之該垂 直體212、212’經沖壓後成為一體成形之導體。 該訊號輻射體22係大致位於該第一開口 213中央位置 7 M331199 處’該訊號輻射體22之下端部分被該接地輻射體21兩側之 垂直體212、212’所包圍、上端則突伸出垂直體212、212,之 外。該訊號輻射體22可以是導電材質所構成之扁平板元件或 是金屬板經沖壓成形之導體。 該接地輻射體21之該水平體211係與該訊號輻射體22 之間相隔一預設距離L1，而該接地輻射體21之兩垂直體 212、212’係與該訊號輻射體22之間分別相隔一預設距離L2、 L3，且不相接觸。藉由該接地輻射體21與該訊號輻射體22 所間隔之預設距離U、L2、L3相互形成電磁耦合效應進而產 I匹配，可增加該寬頻偶極天線20之頻寬者。 該訊號源23係藉由該傳輸線24用以提供該寬頻偶極天 康20無缚通訊之訊號。由於該訊號源23非本創作之技術特 徵且可自習知一般技術選用，故不再贅述其詳細構成。 該傳輸線24 —端與該接地輻射體21以及該訊號輻射體 22分別相連接，另一端則與該訊號源23相連接。該傳輸線 24係為一同軸電纜線，更包括：一金屬訊號線24ι、以及一 接地線242。該傳輸線24 —端之該金屬訊號線241係與該訊 號輻射體22相連接；而於同一端之該接地線242則與該接地 輻射體21之水平體211相連接，成為一接地之功能。 請參閱圖三所示，圖三為本創作之寬頻偶極天線第一較 佳f施例之折返損耗頻率響應圖。其中，垂直座標軸係為折 返瀨耗(return l〇SS)dB(deCibd)，其水平座標轴則為頻率GHz (Frequency)。如圖三所示，本創作第一較佳實施例之該寬頻 偶極天線20於測試頻率2GHz〜6GHz範圍内之折返損耗可得 知’該寬頻偶極天線20於頻寬範圍落於3GHz〜5.4GHz之間 8 M331199 曰夺的折返知耗係小於-10dB ’也就是如圖三所標記之八1〜▽) 之間波段所反映之頻寬範圍，可提供良好的無線通訊品質， 其折返損耗係小於-lOdB之頻寬範圍係57%。 由上述之折返損耗測試圖可得知，本創作該寬頻偶極天 樂20所設計之該接地輻射體21 ’並配合該訊號輻射體22產 I電磁辆合效應(Mutual coupling),此電磁耦合效應對該寬頻 偶極天線20具有匹配之效果，係可增加該寬頻偶極天線2〇 之頻寬範圍。M331199 VIII. New Description: [New Technology Field] This creation is about a wide-band dipole antenna, especially a grounded radiator that is separated from a signal radiator by a preset distance to create electromagnetic coupling between them. Mutual coupling is achieved by increasing the bandwidth of the antenna. [Prior Art] 'In recent years, the demand for wireless applications for consumer electronic products has been increasing. Most of the wireless communication products on the market today are equipped with electronic circuits for generating wireless signals. On the system board, an antenna device is arranged to provide wireless communication or internet function in a certain frequency band. Radiation guides of a particular shape and length are designed for the antenna assembly to accommodate the transmission or reception of wireless signals of a predetermined frequency. Broadband wireless communication technology is becoming more and more widely used in military, civil or personal use. The future of broadband wireless communication is the tendency to attach wireless communication to all electronic devices. 'Computer such as wireless mouse, wireless keyboard, wireless LAN device, computer peripherals, or mobile phone, personal digital assistant (pDA) with mobile phone function, Bluetooth headset, Bluetooth MP3 and other personal consumer information products and many more. Dip〇le Antenna is lightweight, efficient and easy to set up. It provides GSM, Bluetooth and IEEE 802.11 a/b/g# multi-band applications. It is one of the best interfaces and communication bridges for wireless transmission systems. . Please refer to the figure - figure, which is a schematic diagram of a conventional antenna. As shown in FIG. 1, the conventional antenna 10 includes a radiation conductor u, a ground plane 12, a transmission line 5 M331199 transmission line 13, and a signal source 14. The grounding surface 12 is provided with a recess i2i. The radiating conductor u is disposed in the recess 121, and a distance between the radiating conductor u and the recess 121 is appropriate. The signal source M passes through the transmission line U. The radiation conductor 11 and the ground plane 12 are electrically connected. The groove 121 of the grounding surface 12 surrounds the radiation conductor u, and the light-emitting conductor 11 and the preset interaction of the groove 121 generate an electromagnetic conversion effect. The bandwidth is limited to a certain frequency band. It is not applicable to wireless transmission at a higher frequency, and is more likely to cause a downward tilt of the beam angle when transmitting in a high frequency band (for example, when the frequency is above 4 GHz), resulting in a dead angle of the transmission area, resulting in a significant reduction in transmission efficiency. [New content] The first purpose of this creation is to provide a wide-band dipole antenna that uses a grounded radiator to generate electromagnetic coupling effects with the signal radiator to provide a wider frequency band. A second object of the present invention is to provide a wideband dipole antenna that can improve the beam angular offset of the antenna at high frequencies by the second opening of the grounded light emitter. For the above purposes, a wide-band dipole antenna is provided, which comprises: a grounding radiator, a signal radiator, a signal source, and a transmission line. The grounding urging system is a horizontal body, and two ends are respectively connected with a vertical body, and thus a first opening and a second opening are respectively formed on the upper and lower sides of the horizontal body to form a dome shape substantially in appearance. Grounded radiator. At least a portion of the signalless body is located at a central position of the first opening, and a portion M331199 is surrounded by a vertical body on both sides of the grounded radiator. One end of the transmission line is connected to the ground radiator and the signal radiator, and the other end is connected to the signal source. The grounding radiator is spaced apart from the signal radiation system by a predetermined distance and is not in contact with each other. Mutual coupling is generated between the two. [Embodiment] In order to more clearly describe the creation of the present invention The wide-band dipole antenna will be described in detail below with reference to the drawings. Please refer to FIG. 2, which is a perspective view of the first preferred embodiment of the wideband dipole antenna. In the first preferred embodiment shown in FIG. 2, the wideband dipole antenna 20 includes a grounding radiator 21, a signal radiator 22, a signal source 23, and a transmission line 24. The grounding radiator 21 is electrically grounded (GND), and is formed by connecting a vertical body 212, 212' to each end of a horizontal vessel 211, and is formed on the upper and lower sides of the horizontal body 211: The opening 213 and a second opening 214 form a substantially shaped grounded radiator in a general appearance. The body 211 cooperates with the two vertical bodies 212, 212' to form the first opening 213 and the second opening 214 which are vertically and independently. In the first preferred embodiment of the present invention, the depth D2 of the second opening 214 is greater than or equal to the depth D1 of the first opening 213. The grounding radiator 21 may be a flat plate member made of a conductive material or a metal plate. The horizontal body 211 and the vertical bodies 212 and 212' respectively connected to the both ends thereof are stamped to form an integrally formed conductor. The signal radiator 22 is located substantially at the central position 7 M331199 of the first opening 213. The lower end portion of the signal radiator 22 is surrounded by the vertical bodies 212, 212' on both sides of the ground radiator 21, and the upper end protrudes. The vertical bodies 212, 212 are outside. The signal radiator 22 may be a flat plate member made of a conductive material or a stamped conductor of a metal plate. The horizontal body 211 of the grounding radiator 21 is separated from the signal radiator 22 by a predetermined distance L1, and the two vertical bodies 212, 212' of the grounding radiator 21 are separated from the signal radiator 22 A predetermined distance L2, L3, and no contact. The predetermined distances U, L2, and L3 separated by the grounded radiator 21 and the signal radiator 22 form an electromagnetic coupling effect to generate an I match, and the bandwidth of the wideband dipole antenna 20 can be increased. The signal source 23 is used by the transmission line 24 to provide the signal of the broadband dipole antenna 20 unbound communication. Since the signal source 23 is not a technical feature of the present invention and can be selected from the conventional technology, the detailed configuration thereof will not be described again. The transmission line 24 is connected to the ground radiator 21 and the signal radiator 22, respectively, and the other end is connected to the signal source 23. The transmission line 24 is a coaxial cable, and further includes: a metal signal line 24i, and a ground line 242. The metal signal line 241 at the end of the transmission line 24 is connected to the signal radiator 22; and the ground line 242 at the same end is connected to the horizontal body 211 of the ground radiator 21 to function as a ground. Please refer to FIG. 3, which is a frequency response diagram of the foldback loss of the first preferred embodiment of the wideband dipole antenna. Among them, the vertical coordinate axis is return 〇SS dB (deCibd), and the horizontal coordinate axis is frequency GHz (Frequency). As shown in FIG. 3, the foldback loss of the wideband dipole antenna 20 of the first preferred embodiment of the present invention in the range of 2 GHz to 6 GHz can be known as 'the wideband dipole antenna 20 falls within the bandwidth range of 3 GHz~ Between 8 GHz and 5.4 GHz, the retraction loss of the 8 M331199 is less than -10 dB 'that is, the bandwidth range reflected by the band between the eight and 1 ▽ marks in Figure 3, which provides good wireless communication quality, and its return The bandwidth of the loss system less than -10 dB is 57%. It can be seen from the above-mentioned fold loss loss test chart that the grounded radiator 21' designed by the broadband dipole Tianle 20 is combined with the signal radiator 22 to generate an electromagnetic coupling effect. The effect of matching the wideband dipole antenna 20 is to increase the bandwidth of the wideband dipole antenna.
於本創作第一較佳實施例中，該寬頻偶極天線20之操作 頻帶(Frequency Band)範圍為3GHz〜5.4GHz之間，其中心頻 奉約為4.2GHz。且由於公式1/又（波長）=F (頻率），故可 蓊由其巾心鮮導iH紐長之長度，即可根據該巾心頻率波 長之長度而調整該訊號輻射體22之適當長度。另，該訊號輻 舦體22與接地輻射體21於該第一開口 213處之間會有一特 性阻抗(Zc)，該特性阻抗的值可由該訊號輕射體22的寬度、 揍地輻射體21的寬度以及該訊號輻_ 22 __射^21 的間距來控制。我們可在下述的參數範圍A，獲得該天線如 最佳之頻寬··在第-開口 213兩旁之接地轄射體21的長 範圍在o.〇7Xg<D1<angA為中心頻率的波長；同時， 特性阻抗Zc的範圍在65Ω <Zc<165Q。 請參閱圓四所示，圖四為本創作之寬頻偶極天線第 佳實施例之細場型圖。如圖四所示，其係為該寬頻偶極天 線20位於頻率4.8GHz時所模擬之輻射場型圖。 由於該寬頻偶極天線2〇本身具有方向性，天線感受電磁 波的訊號強度會糾天線接收角度和物波來財向是否一 9 M331199 致而有不同效果，故該寬頻偶極天線20為了得到更佳之收發 訊號效果，遂利用該接地輻射體21之該第二開口 214與第一 開口 213相對應之特性，用以改善該寬頻偶極天線2〇於高頻 率時所產生之波束角度偏移。由圖四之輻射場型圖可得知， 本創作第一較佳實施例之該寬頻偶極天線20兩侧面之增益最 大值（dBi)大致分別位於〇度以及180度，使該寬頻偶極天 線20之發射角度不致於有所偏差。 以下所述之本創作其他較佳實施例中，因大部份的元件 係相同或類似於前述實施例，故相同之元件與結構以下將不 再贅述，且相同之元件將直接給予相同之名稱及編號，並對 於類似之元件則給予相同名稱但在原編號後另增加一英文字 母以資區別且不予贅述，合先敘明。 請參閲圖五所示，圖五為本創作之寬頻偶極天線第二較 佺實施例之立體示意圖。本創作之第二較佳實施例中之寬頻 偽極天線與第一較佳實施例之不同點在於，該寬頻偶極天線 20a更包括：一曲折線25、以及一接地片26。該曲折線25係 1連續彎折型態之導體，並設置於該第一開口 213a中央位置 處，其一端設置於該訊號輻射體22a之上，且被該接地輻射 體：21a兩侧之垂直體212a、212a’所包圍，另一端則與該傳輸 象24a相連接。 該曲折線25可以是導電材質所構成之印刷電路或是金屬 板經沖壓成形之導體。亦可以於沖壓該訊號輻射體22a之同 時將其連讀彎折型態之該曲折線25 —併沖壓成形，使該訊號 輻射體22a與該曲折線25形成一體。 該接地片26其一端係設置於該接地輻射體21a之水平體 M331199 211a上，且平行位於該曲折線25之側邊並相互對應間隔一預 設距離L4,更被相互對稱之垂直體212a、212a，所包圍，該接 地片26藉由此預設距離L4與該曲折線乃形成電磁耦合效 應，進而令兩者間產生匹配來更進一步地增加該寬頻偶極天 線20a之頻寬者。亦可於沖壓該接地輻射體21a之同時將該 接地片26 一併沖壓成形，使該接地輻射體21a與該接地片26 為一體成形者。 請參閱圖六A所示，圖六A為本創作之寬頻偶極天線第 三較佳實施例之立體示意圖。本創作之第三較佳實施例中之 宽頻偶極天線與第一較佳實施例之不同點在於，縮小該寬頻 偶極天線20b之尺寸’可藉由該接地輻射體21b中央之該水 平·體211b兩端所分別連接之該垂直體212b、212b，大致以該 乳號輻射體22b為中心軸相對彎折成一圓弧狀，使兩垂直艘 212b、212b’相對彎折成為弧狀，且令該訊號輻射體22b大致 位於兩弧狀之垂直體212b、212b’之中間並保持一適當間距， 同時將該訊號輻射體22b之一部份包圍，令兩者相互間產生 電磁耦合效應者。 請參閱圖六B所示，圖六B為本創作之寬頻偶極天線第 四較佳實施例之立體示意圖。本創作之第四較佳實施例中之 寬頻偶極天線與第一較佳實施例之不同點在於，縮小該寬頻 偶極天線20c之尺寸，可藉由該接地輻射體21c中央之該水 平體211c將兩端所分別連接之該垂直體212c、212c’大致以 該訊號輻射體22c為中心轴相對彎折成一门狀，且令該訊號 輻射體22c大致位於兩垂直體212c、212c’之中間並保持一適 當間距，同時將該訊號輻射體22c之一部份包圍，可令兩者 M331199 【圖式簡單說明】 圖一係為習知天線示意圖。 圖二係為本創作之寬頻偶極天線第一較佳實施例立體示 意圖。 圖三係為本創作之寬頻偶極天線第一較佳實施例之折返 損耗頻率響應圖。 圖四係為本創作之寬頻偶極天線第一較佳實施例之輻射 場型圖。 圖五係為本創作之寬頻偶極天線第二較佳實施例之立體 禾意圖。 圖六A係為本創作之寬頻偶極天線第三較佳實施例之立 體不意圖0 圓六B係為本創作之寬頻偶極天線第四較佳實施例之立 艘示意圖。 【主要元件符號說明】 10〜習知偶極天線 11〜輻射導體 12〜接地面 121〜凹槽 13〜傳輸線 14〜訊號源 20、 20a、20b、20c〜寬頻偶極天線 21、 21a、21b、21c〜接地輻射體 13 M331199 211、 211a、211b、211c〜水平體 212、 212a、212b、212c〜垂直體 212, 、212a，、212b，、212c，〜垂直體 213、 213a〜第一開口 214〜第二開口 22、22a、22b、22c〜訊號輻射體 23〜訊號源 24、24a〜傳輸線 241〜金屬訊號線 242〜接地線 25〜曲折線 26〜接地片In the first preferred embodiment of the present invention, the wideband dipole antenna 20 has a frequency band ranging from 3 GHz to 5.4 GHz and a center frequency of about 4.2 GHz. And because the formula 1/(wavelength)=F (frequency), the length of the iH button length can be adjusted by the towel core, and the appropriate length of the signal radiator 22 can be adjusted according to the length of the band center wavelength. . In addition, the signal radiating body 22 and the grounding radiator 21 have a characteristic impedance (Zc) between the first openings 213, and the value of the characteristic impedance can be the width of the signal light emitter 22, and the radiator 114 The width and the spacing of the signal _ 22 __ shot ^ 21 are controlled. We can obtain the antenna such as the optimum bandwidth in the parameter range A described below. The length of the grounded yoke 21 on both sides of the first opening 213 is at the wavelength of o. 〇 7Xg < D1 <angA; Meanwhile, the characteristic impedance Zc ranges from 65 Ω < Zc < 165Q. Please refer to the circle 4, which is a fine-field diagram of the preferred embodiment of the wide-band dipole antenna of the present invention. As shown in Fig. 4, it is a radiation field pattern simulated by the broadband dipole antenna 20 at a frequency of 4.8 GHz. Since the wide-band dipole antenna 2 is inherently directional, the signal strength of the antenna sensing electromagnetic wave will correct the antenna receiving angle and the object wave to have a different effect, so the wide-band dipole antenna 20 is obtained in order to obtain more directionality. Preferably, the signal is transmitted and received by the second opening 214 of the grounding radiator 21 to improve the beam angle deviation generated by the wide-band dipole antenna 2 at a high frequency. It can be seen from the radiation field pattern of FIG. 4 that the gain maximum (dBi) of the two sides of the wide-band dipole antenna 20 of the first preferred embodiment of the present invention is approximately at a twist and 180 degrees, respectively, so that the wide-band dipole The angle of emission of the antenna 20 is not biased. In the other preferred embodiments of the present invention described below, since the components are the same or similar to the foregoing embodiments, the same components and structures will not be described below, and the same components will be directly given the same names. And number, and the same name is given for similar components, but an additional letter is added after the original number to distinguish and not repeat them. Please refer to FIG. 5, which is a perspective view of a second comparative embodiment of the wideband dipole antenna. The broadband pseudo-pole antenna of the second preferred embodiment of the present invention is different from the first preferred embodiment in that the wide-band dipole antenna 20a further includes a meander line 25 and a grounding strip 26. The meander line 25 is a continuous bending type conductor, and is disposed at a central position of the first opening 213a, one end of which is disposed on the signal radiator 22a, and is perpendicular to both sides of the ground radiator: 21a. The body 212a, 212a' is surrounded by the other end and connected to the transmission image 24a. The meander line 25 may be a printed circuit formed of a conductive material or a conductor formed by stamping a metal plate. Alternatively, the signal radiator 22a may be stamped and the stamped line 25 of the bent pattern may be continuously formed by stamping, so that the signal radiator 22a is integrated with the meander line 25. One end of the grounding strip 26 is disposed on the horizontal body M331199 211a of the grounding radiator 21a, and is parallel to the side of the meandering line 25 and is spaced apart from each other by a predetermined distance L4, and is further symmetric with each other. Surrounded by 212a, the grounding strip 26 forms an electromagnetic coupling effect with the meander line by the predetermined distance L4, thereby causing a match between the two to further increase the bandwidth of the wideband dipole antenna 20a. The grounding lug 26 may be collectively press-formed while the grounding radiator 21a is being punched, so that the grounding radiator 21a and the grounding lug 26 are integrally formed. Referring to FIG. 6A, FIG. 6A is a perspective view of a third preferred embodiment of the wideband dipole antenna of the present invention. The wide-band dipole antenna of the third preferred embodiment of the present invention is different from the first preferred embodiment in that the size of the wide-band dipole antenna 20b is reduced by the level of the center of the grounded radiator 21b. The vertical bodies 212b and 212b respectively connected to the two ends of the body 211b are substantially bent into an arc shape with the breast radiator 22b as a central axis, so that the two vertical ships 212b and 212b' are relatively bent into an arc shape. And the signal radiator 22b is located substantially in the middle of the two arc-shaped vertical bodies 212b, 212b' and maintains a proper spacing, and at the same time, partially encloses one of the signal radiators 22b, so that the two electromagnetic coupling effects occur with each other. . Referring to FIG. 6B, FIG. 6B is a perspective view of a fourth preferred embodiment of the wideband dipole antenna of the present invention. The wide-band dipole antenna in the fourth preferred embodiment of the present invention is different from the first preferred embodiment in that the size of the wide-band dipole antenna 20c is reduced by the horizontal body in the center of the grounded radiator 21c. 211c, the vertical bodies 212c, 212c' respectively connected to the two ends are substantially bent into a gate shape with the signal radiator 22c as a central axis, and the signal radiator 22c is located substantially in the middle of the two vertical bodies 212c, 212c'. And maintaining a proper spacing while enclosing a portion of the signal radiator 22c, the two M331199 can be made as a schematic diagram of a conventional antenna. Figure 2 is a perspective view of a first preferred embodiment of the wideband dipole antenna of the present invention. Figure 3 is a diagram of the foldback loss frequency response of the first preferred embodiment of the proposed wideband dipole antenna. Figure 4 is a radiation pattern diagram of the first preferred embodiment of the wideband dipole antenna of the present invention. Figure 5 is a perspective view of a second preferred embodiment of the wideband dipole antenna of the present invention. Fig. 6A is a schematic diagram of a fourth preferred embodiment of the wide-band dipole antenna of the present invention, which is the third preferred embodiment of the wide-band dipole antenna of the present invention. [Description of main component symbols] 10~ conventional dipole antenna 11 to radiation conductor 12 to ground plane 121 to groove 13 to transmission line 14 to signal source 20, 20a, 20b, 20c to broadband dipole antenna 21, 21a, 21b, 21c~ grounding radiator 13 M331199 211, 211a, 211b, 211c~ horizontal body 212, 212a, 212b, 212c~ vertical body 212, 212a, 212b, 212c, vertical body 213, 213a~ first opening 214~ Second opening 22, 22a, 22b, 22c to signal radiator 23 to signal source 24, 24a to transmission line 241 to metal signal line 242 to ground line 25 to meander line 26 to grounding piece