九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種天線裝置，且特別是有關於一種 内建於無線通訊設備中，用以接收數位電視訊號之天線裝 置。 【先前技術】 隨著科技的進步，通訊技術的主戰場已漸漸地從有線 的通訊技術轉移至無線的通訊技術。尤其是應用於數位電 視訊號傳播上，使得無線數位電視可使用於戶外及行動接 收，不必侷限於室内收看，此時收訊品質之良莠是使用者 最重視之環節，而擔負收訊重任之天線裝置即成為無線數 位電視最關鍵之組件之一。 以往用以接收數位電視訊號之行動裝置，天線裝置大 都疋附加在行動裝置的外部來接收無限訊號，例如螺旋式 (helix)天線，然由於外露式天線易受外力而損壞且不利於攜 帶。因此目前的設計趨勢是使用一種外接式天線裝置，當 使用時再連接於行動裝置之USB埠來將無線數位電視訊號 傳送給行動裝置。但由於數位電視的操作頻段介於47〇mHz 到870MHz，若依一般的天線物理尺寸設計會造成外接式天 線過大而不利於攜帶等等。 因此實須一種可整合於外接式無線數位電視接收盒之 微型接收天線，以提昇無線行動的方便性。 【發明内容】 1357691 因此本發明的目的就是在提供一種微型無線數位電視 接收天線，可以整合在外接式無線數位電視頻率接收盒内。 為達到上述之目的，本發明之數位電視天線，係位於 一行動裝置内包含：一連接導體板；一第一輻射導體，具 有一金屬片以及一螺旋形金屬線，其中該螺旋形金屬線之 一端連接該連接導體板，另一端連接該金屬片，且螺旋形 金屬線環繞包圍該金屬片；一第二輻射導體位於該第一輻 射導體之第一側邊’具有一曲折主迴圈金屬線以及一次迴 路金屬線，該曲折主迴圈金屬線具有至少一彎折端部，其 中該曲折主迴圈金屬線之—端連接該連接導體板，而該至 少一彎折端部連接該次迴路金屬線；一第三輻射導體位於 該第二輻射導體不與該第一輻射導體鄰接之一側邊，具有 一曲折主迴圈金屬線以及—次迴路金屬線，該曲折主迴圈 ::線具有至少一彎折端部，其中該曲折主迴圈金屬線之 一端連接該連接導體板，而該至少一彎折端部連接該次迴 :金屬線，一第四輻射導體位於該第一輻射導體面對該第 “邊之一第一側邊，具有一金屬片以及一螺旋形金屬 ’、中該螺旋形金屬線之—端連接該連接導體板，另一 ::接該金屬片，且螺旋形金屬線環繞包圍該金屬片；以 體翻第五輻射導體位於該第四輕射導體不與該第一輻射導 金屬接之一側邊’具有一曲折主迴圈金屬線以及-次迴路 線’該曲折主迴圈金屬線具有至少折端部，其中 ^主迴圈金屬線之—端連接料接導體板，而該至少 考折端部連接該次迴路金屬線。 6 1357691 【實施方式】 第1圖繪示了根據本發明一較佳實施例之數位電視天 線100概略圖示。其中此數位電視天線1〇〇係内藏於一行 動裝置，例如一外接式無線數位電視接收盒中，用以接收 470MHZ到870MHz之數位電視頻段，而此外接式無線數位 電視接收盒例如為一數位電視棒（DTV USB d〇ngle )。 本發明之數位電視天線100包括5個相連接之第一輻IX. INSTRUCTIONS: FIELD OF THE INVENTION The present invention relates to an antenna device, and more particularly to an antenna device built into a wireless communication device for receiving digital television signals. [Prior Art] With the advancement of technology, the main battlefield of communication technology has gradually shifted from wired communication technology to wireless communication technology. Especially for digital TV signal transmission, wireless digital TV can be used for outdoor and mobile reception, and is not limited to indoor viewing. At this time, the quality of reception is the most important part of the user, and it is responsible for receiving the message. The antenna device is one of the most critical components of wireless digital TV. In the past, mobile devices for receiving digital television signals, antenna devices are mostly attached to the outside of mobile devices to receive infinite signals, such as helix antennas, but the exposed antennas are easily damaged by external forces and are not conducive to carrying. Therefore, the current design trend is to use an external antenna device that, when in use, is connected to the USB port of the mobile device to transmit the wireless digital television signal to the mobile device. However, since the operating frequency of digital TV is between 47〇mHz and 870MHz, if the physical size of the antenna is designed, the external antenna will be too large to be carried. Therefore, a miniature receiving antenna that can be integrated into an external wireless digital television receiving box is needed to improve the convenience of wireless operation. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a miniature wireless digital television receiving antenna that can be integrated in an external wireless digital television frequency receiving box. To achieve the above object, the digital television antenna of the present invention is located in a mobile device and includes: a connecting conductor plate; a first radiation conductor having a metal piece and a spiral metal wire, wherein the spiral metal wire One end is connected to the connecting conductor plate, the other end is connected to the metal piece, and the spiral metal wire surrounds the metal piece; a second radiation conductor is located on the first side of the first radiation conductor and has a meandering main loop metal wire And a primary circuit metal wire having at least one bent end portion, wherein the end of the meandering main loop metal wire is connected to the connecting conductor plate, and the at least one bent end portion is connected to the secondary circuit a metal wire; a third radiation conductor is located on a side of the second radiation conductor not adjacent to the first radiation conductor, has a meandering main loop metal line and a secondary loop metal line, the meandering main loop:: line Having at least one bent end, wherein one end of the meandering main loop wire is connected to the connecting conductor plate, and the at least one bent end is connected to the second back: metal wire, a fourth The radiation conductor is located at a first side of the first radiation conductor facing the first side, having a metal piece and a spiral metal, wherein the end of the spiral metal wire is connected to the connecting conductor plate, and the other is: : connecting the metal piece, and the spiral metal wire surrounds the metal piece; the body-turning fifth radiation conductor is located at a side of the fourth light-emitting conductor that is not connected to the first radiation-conducting metal portion The winding metal wire and the secondary circuit wire 'the zigzag main loop metal wire has at least a folded end portion, wherein the end of the main loop metal wire is connected to the conductor plate, and the at least the bent end portion is connected to the secondary circuit metal 6 1357691 [Embodiment] FIG. 1 is a schematic diagram of a digital television antenna 100 according to a preferred embodiment of the present invention, wherein the digital television antenna 1 is embedded in a mobile device, such as an external device. In the wireless digital television receiving box, it is used for receiving a digital television band of 470 MHz to 870 MHz, and the external wireless digital television receiving box is, for example, a digital TV set (DTV USB d〇ngle). The digital television antenna of the present invention 100 includes 5 connected first spokes
射導體ιοί、第二輻射導體102、第三輻射導體1〇3、第四 輻射導體104以及第五輻射導體1〇5。其中第—輻射導體 1〇1和第四輻射導體104之導線走線方式相同，而第二輻射 導體102'第三輕射導體1〇3以及第五賴射導體ι〇5之導線 走線方式相同。第二輻射導體1G2和第三輻射導體ι〇3係 位於第一輻射導體101之一側邊，而第四輻射導體i⑽以 及第五ΦΙ射導ϋ 1()5係位於第—_導豸igi之另一側 邊’而第三輻射導體103以及第五輻射導體105分別為於 最外侧》 'The conductor ιοί, the second radiation conductor 102, the third radiation conductor 1〇3, the fourth radiation conductor 104, and the fifth radiation conductor 1〇5. Wherein the first radiation conductor 1〇1 and the fourth radiation conductor 104 are wired in the same manner, and the second radiation conductor 102' is connected to the third light-emitting conductor 1〇3 and the fifth-radiation conductor 〇5. the same. The second radiation conductor 1G2 and the third radiation conductor ι 3 are located on one side of the first radiation conductor 101, and the fourth radiation conductor i (10) and the fifth Φ Ι ϋ 1 () 5 are located at the first The other side 'and the third radiation conductor 103 and the fifth radiation conductor 105 are respectively on the outermost side'
在-實施例中，此5個相連接之轄射導體分別佈設於 -外接式無線數位電視接收盒内表面之底面與側面如第2 圖所示，第i射導體1G1係佈設於無線數位電視接收各 200之底面2(H，而第二輕射導體1〇2和第三輕射導體^ 係佈設於無線數位電視接收盒之第一側面加，第四轄 射導體104以及第五輻射導體1〇5係佈設於面 202之第二側面2仏其中第一_導體1〇1佔據之面積約 為24(mm)x60(mm)’而第二輕射㈣1〇2#第三輕 1〇3,以及第四輕射導體1〇4和第五転射導體1〇5分別佔據 1357691 之面積約為10(mm)x60(mm)。但在實際應用上，此5個輻 射導體之佈設位置以及佔據面積並不為本實施例所限制。 用以形成此5個輻射導體方法，例如是以印刷或蝕刻技術 形成於無線數位電視接收盒200之内表面上。傳輸線1〇6 可以為一銅軸傳輸線或一微帶傳輸線或一共平面波導線。 此5個相連接之輻射導體共同連至一連接導體板1〇7。連接 導體板107作為本發明之數位電視天線1〇〇之饋入點，透 過一銅柱（圖中未繪出）或一彈片（圖中未繪出）分別與 一同軸傳輸線（圖中未繪出）之信號導線連接。 請參閱第3圖所示為第一輻射導體與第四輻射導體之 放大圖示。第一輻射導體101包含有一金屬片1011與一螺 旋形金屬線1012,其中螺旋形金屬線1012的一端連接至連 接導體板107，另一端連接至金屬片1011。當螺旋形金屬 線1012從連接導體板107延展而出後，會以螺旋形走線方 式排列於基板上，其中隨著走線之延展每一螺旋走線環繞 面積會逐漸縮小，最後連接至金屬片1011使得螺旋形金屬 線1012環繞排列於金屬片1011周邊。 第四輻射導體104亦包含有一金屬片1041與一螺旋形 金屬線1042’其中螺旋形金屬線1042的一端連接至連接導 體板107,另一端連接至金屬片1041。當螺旋形金屬線1〇42 從連接導體板107延展而出後，會以螺旋形走線方式排列 於基板上，其中隨著走線之延展每一螺旋走線環繞面積會 逐漸縮小，最後連接至金屬片1041使得螺旋形金屬線1〇42 環繞排列於金屬片1041周邊。在一實施例中，螺旋形金屬 線1012之迴圈數共有9圈，而螺旋形金屬線1042之迴圈 8 1357691 數有3圈。 請參閱第4圖所示為第二輻射導體、第三輻射導體與 第五輻射導體之放大圖示。第二輻射導體102包含有一曲 折主迴圏金屬線1〇2i與一次迴路金屬線1〇22〇曲折主迴圈 金屬線1021連接至連接導體板1〇7,並以連續側傾“S”形 之走線方式排列於一基板上，而形成9個彎折端部，分別 為第一至第九彎折端部10211、10212、10213、10214、 10215、10216、10217、10218 和 10219。但在實際應用上 曲折主迴圈金屬線1021之彎折端部數目並不為本實施例所 限制。次迴路金屬線1022具有多個分支線以分別與第奇數 個彎折端部 1〇211、10213、10215、10217 和 10219 底端連 接’用以形成額外之迴路來增加電流路徑長度。 第二輻射導體103包含有一曲折主迴圈金屬線1〇31與 一次迴路金屬線1032。曲折主迴圈金屬線1〇31連接至連接 導體板107,並以連續侧傾“S”形之走線方式排列於一基 板上，而形成5個彎折端部，分別為第一至第五彎折端部 10311、10312、10313、10314 和 10315。但在實際應用上 曲折主迴圈金屬線1031之彎折端部數目並不為本實施例所 限制。次迴路金屬線1032具有多個分支線以分別與第奇數 個彎折端部10311、10313和10315底端連接，用以形成額 外之迴路來增加電流路徑長度。 第五輻射導體105亦包含有一曲折主迴圈金屬線.1〇51 與一次迴路金屬線1052。曲折主迴圈金屬線1〇51連接至連 接導體板107,並以連續側傾“S”形之走線方式排列於一 基板上，而形成5個弯折端部，分別為第一至第五彎折端 1357691 10511 ' 1〇512、10513、10514 和 10515。但在實際應用 上曲折主迴圈金屬線1051之彎折端部數目並不為本實施例 所限制。次迴路金屬線1052具有多個分支線以分別與第奇 數個彎折端部10511、10513和10515底端連接，用以形成 額外之迴路來增加電流路徑長度。 在其他之實施例中，第二輻射導體102、第三輻射導 體103以及第五輻射導體1〇5之次迴路金屬線亦可分別連 接至其彎折端部底端之一侧邊。此外，因為天線之有效長 度與操作頻率與波長有關，故可藉由改變天線路徑長度， 來設計符合頻寬需求之天線，此外亦可透過改變線寬、線 距來影響耦合量，間接影響天線之有效長度。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 為讓本發明之上述和其他目的、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖所示為根據本發明一較佳具體實施例之數位電 視天線概略圖示。 第2圖所示為根據本發明一較佳具體實施例數位電視 天線形成於外接式無線數位電視接收盒之概略圖示。 第3圖所示為第一輻射導體與第四輻射導體之放大圖 10 1357691 7f> ° 第4圖所示為第二輻射導體、第三輻射導體與第五輻 射導體之放大圖示 【主要元件符號說明】 100數位電視天線 101第一輻射導體 102第二輻射導體In the embodiment, the five connected radiation conductors are respectively disposed on the bottom surface and the side surface of the inner surface of the external radio digital television receiver box, as shown in FIG. 2, and the ith radiation conductor 1G1 is disposed on the wireless digital television. Receiving the bottom surface 2 of each 200 (H, and the second light-emitting conductor 1〇2 and the third light-emitting conductor are disposed on the first side of the wireless digital television receiving box, the fourth radiation conductor 104 and the fifth radiation conductor 1〇5 is disposed on the second side 2 of the face 202. The area occupied by the first_conductor 1〇1 is about 24 (mm) x 60 (mm)' and the second light shot (four) 1〇2# third light 1〇 3, and the fourth light-emitting conductor 1〇4 and the fifth radiation conductor 1〇5 occupy an area of 1357691 respectively of about 10 (mm) x 60 (mm). However, in practical applications, the positions of the five radiation conductors are laid. And occupying the area is not limited by the embodiment. The method for forming the five radiation conductors is formed on the inner surface of the wireless digital television receiving box 200, for example, by printing or etching. The transmission line 1〇6 may be a copper. A shaft transmission line or a microstrip transmission line or a coplanar waveguide line. The five connected radiation conductors are Connected to a connecting conductor plate 1〇7. The connecting conductor plate 107 serves as a feeding point of the digital television antenna 1〇〇 of the present invention, through a copper column (not shown) or a shrapnel (not shown) They are respectively connected to signal wires of a coaxial transmission line (not shown). Please refer to Fig. 3 for an enlarged view of the first radiation conductor and the fourth radiation conductor. The first radiation conductor 101 includes a metal piece 1011 and A spiral metal wire 1012, wherein one end of the spiral metal wire 1012 is connected to the connecting conductor plate 107, and the other end is connected to the metal piece 1011. When the spiral metal wire 1012 is extended from the connecting conductor plate 107, it is spiraled. The routing manner is arranged on the substrate, wherein each spiral routing surrounding area is gradually reduced as the routing extends, and finally connected to the metal piece 1011 such that the spiral metal line 1012 is circumferentially arranged around the periphery of the metal piece 1011. The fourth radiation conductor 104 also includes a metal piece 1041 and a spiral metal wire 1042'. One end of the spiral metal wire 1042 is connected to the connecting conductor plate 107, and the other end is connected to the metal piece 1041. When the spiral metal After extending from the connecting conductor plate 107, they are arranged on the substrate in a spiral manner, wherein the surrounding area of each spiral trace is gradually reduced as the trace extends, and finally connected to the metal piece 1041. The spiral metal wires 1〇42 are arranged around the periphery of the metal piece 1041. In one embodiment, the number of turns of the spiral metal wire 1012 is 9 turns, and the number of loops 8 1357691 of the spiral metal wire 1042 is 3 turns. Please refer to Fig. 4 for an enlarged view of the second radiation conductor, the third radiation conductor and the fifth radiation conductor. The second radiation conductor 102 comprises a meandering main returning metal wire 1〇2i and a primary return metal wire 1〇. 22 turns of the main loop metal wire 1021 connected to the connecting conductor plate 1〇7, and arranged in a continuous roll "S" shape on a substrate, forming 9 bent ends, respectively, the first To the ninth bent end portions 10211, 10212, 10213, 10214, 10215, 10216, 10217, 10218, and 10219. However, the number of bent end portions of the meandering main loop wire 1021 in practical applications is not limited by this embodiment. The secondary circuit metal line 1022 has a plurality of branch lines to be respectively coupled to the bottom ends of the odd-numbered bent ends 1〇211, 10213, 10215, 10217 and 10219 to form an additional loop to increase the current path length. The second radiation conductor 103 includes a meandering main loop metal wire 1?31 and a primary return metal wire 1032. The meandering main loop metal wire 1〇31 is connected to the connecting conductor plate 107, and is arranged on a substrate in a continuous roll "S" shape, and forms five bent ends, respectively, first to first Five bent ends 10311, 10312, 10313, 10314 and 10315. However, the number of bent end portions of the meandering main loop metal wire 1031 in practical applications is not limited by this embodiment. The secondary circuit metal line 1032 has a plurality of branch lines connected to the bottom ends of the odd-numbered bent ends 10111, 10313, and 10315, respectively, to form an additional loop to increase the current path length. The fifth radiation conductor 105 also includes a meandering main loop metal wire .1〇51 and a primary return metal line 1052. The meandering main loop metal wire 1〇51 is connected to the connecting conductor plate 107, and is arranged on a substrate in a continuous roll "S" shape, and forms five bent ends, respectively, first to first Five bent ends 1357691 10511 '1〇512, 10513, 10514 and 10515. However, the number of bent end portions of the meandering main loop wire 1051 in practical applications is not limited by this embodiment. The secondary circuit metal line 1052 has a plurality of branch lines to be connected to the bottom ends of the odd-numbered bent ends 10511, 10513, and 10515, respectively, to form an additional loop to increase the current path length. In other embodiments, the secondary return wires of the second radiating conductor 102, the third radiating conductor 103, and the fifth radiating conductor 1〇5 may also be respectively connected to one side of the bottom end of the bent end. In addition, since the effective length of the antenna is related to the operating frequency and the wavelength, the antenna can be designed to meet the bandwidth requirement by changing the length of the antenna path. In addition, the amount of coupling can be affected by changing the line width and the line spacing, and the antenna is indirectly affected. Effective length. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; A schematic representation of a digital television antenna of an embodiment. Figure 2 is a schematic illustration of a digital television antenna formed in an external wireless digital television receiver in accordance with a preferred embodiment of the present invention. Figure 3 is an enlarged view of the first radiation conductor and the fourth radiation conductor. Figure 10 1357691 7f> ° Figure 4 is an enlarged view of the second radiation conductor, the third radiation conductor and the fifth radiation conductor. DESCRIPTION OF SYMBOLS 100-digit television antenna 101 first radiation conductor 102 second radiation conductor
103第三輻射導體 104第四輻射導體 105第五輻射導體 107連接導體板 200無線數位電視接收盒 201底面 202第一侧面 203第二側面103 third radiation conductor 104 fourth radiation conductor 105 fifth radiation conductor 107 connecting conductor plate 200 wireless digital television receiving box 201 bottom surface 202 first side 203 second side
1011與1041金屬片 1012與1042螺旋形金屬線 1021、 1031、1051曲折主迴圈金屬線 1022、 1032、1052次迴路金屬線 1021 卜 10212、10213、10214、10215、10216、10217、 10218、10219、10311、10312、10313、10314、10315、10511、 10512、10513、10514 和 10515 彎折端部 111011 and 1041 metal sheets 1012 and 1042 spiral metal wires 1021, 1031, 1051 meander main loop metal wires 1022, 1032, 1052 secondary circuit wires 1021 10212, 10213, 10214, 10215, 10216, 10217, 10218, 10219, 10311, 10312, 10313, 10314, 10315, 10511, 10512, 10513, 10514, and 10515 bent end 11