201249001 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種天線結構，且 段的天線與具有其之電子裝置。 寺mi於-種雙頻 【先前技術】 隨著行動通訊與無線網路的快速 愈來愈廣泛，對於雙頻或是多頻天線。訊應用範圍 的多頻天線通常利用槽孔來激發另―共:模能 作頻帶，使其適用於不同協定的應用頻帶V例：心 ' 8Q2‘U a/b/g的應_帶。只是這樣的天線結ς且 有體積大、占空間的問題。 獨立式天線設計大多是利用平面倒F形天線結構，這類型 天線大多應时筆記”腦與手m置上，並且使用小型同 軸線饋入信號至天線。-般而言，信號饋人天線的方式只有一 種，同軸線必須配合天線的結構經由特定的饋人端連接至天線 。天線的饋入方向無法隨時配合系統需求而調整，因此傳統的 天線無法滿足左右饋人的設計需求。當天線的饋人端需要設置 在天線的另一端時，即需要另一組尺寸相同但結構鏡射的天線 結構。結構鏡射的天線需要另一組不同的天線模具來製造，這 大幅增加了天線的製作費用。 此外’習知的獨立式天線設計抗拒鄰近金屬干擾的能力較 差，容易因鄰近金屬靠近天線而影響到天線輻射體的阻抗匹配 與輻射效率。 3/20201249001 VI. Description of the Invention: [Technical Field] The present invention relates to an antenna structure, and an antenna of the segment and an electronic device having the same. Temple mi is a dual-frequency system. [Prior Art] With the rapid spread of mobile communications and wireless networks, for dual-frequency or multi-frequency antennas. Multi-frequency antennas in the application range usually use slots to excite other modes: the mode can be used as a frequency band, making it suitable for different application frequency bands V: the heart of '8Q2'U a/b/g. It is only such an antenna that is crusted and has a large volume and space. Most of the independent antenna designs use a planar inverted-F antenna structure. Most of these types of antennas should be placed on the brain and hand, and a small coaxial line is used to feed the signal to the antenna. In general, the signal is fed to the antenna. There is only one way, the coaxial line must be connected to the antenna through the specific feeding end of the antenna structure. The feeding direction of the antenna cannot be adjusted at any time according to the system requirements, so the traditional antenna can not meet the design requirements of the left and right feeding. When the feed end needs to be placed at the other end of the antenna, another set of antenna structures of the same size but with a mirror structure is required. The structure mirrored antenna needs another set of different antenna molds to be manufactured, which greatly increases the antenna fabrication. In addition, the conventional independent antenna design is less resistant to adjacent metal interference, and it is easy to affect the impedance matching and radiation efficiency of the antenna radiator due to the proximity of the metal to the antenna. 3/20
I 201249001 【發明内容】 ι有種雙齡的天㈣具有其之電子裝置。天缘 /、有兩個叙方向’在錢時相t讀 、 降低鄰近金屬物體對天線的匹配與轄射場型的t塑可以 +本發明提出-種天線，包括_接地部、—;y 蔽牆。主輻射部連接於該接地部的m與一屏 結構對稱的-第一賴射邻* @ ά 6彡5亥主輕射部具有 呈右μ雜 第二_射部，其巾該第—輻射邮 .具有一第一饋入端，該第二輕射部 =射部 連接:，地部的-第二邊並與該二:〜屏蔽牆 ，第，、=s亥第一轄射部包括一第一幸畐射臂與一第-幸5射劈 s亥苐一細部包括一第三輕射 弟^田射臂， 輕射臂與料二輻射t交d # ^吨射’其中該第-，乂又。又置，其令該第二輻射臂 乐四季田射 射部的中間部分向兩側方向延伸以^四幸田下射臂分別由該主韓 輕射臂與該第三_臂_; 7構，而該第- 射部的中間部分方向延伸 ‘射4的兩側向該主輻 ，該丁料伽/ _场成兩個相互對稱的倒L型⑼ 本個域之中 屏蔽牆。主輕射部連接於該 輪射部與一 該接地部的一第二邊且與該主邊；屏蔽踏連接於 上述天線可以應用在電子奘 多媒體播放器、連網電禎納:置，例如桌上型電腦的主機、 綜合上述，本===見盒或則播放器等。 端，可選擇兩種同轴線的備太線具有兩個不同方向的饋入 膠附著於機構件上，其屏蔽胯豆二天線的接地部可以藉由背 射場型的問題。另線$低鄰近金屬影響匹配與輻 天線的結構可以利用單片金屬片經冲壓·成 4/20 201249001 型與彎折製成，其止出士Μ β、， 的天線應用在可無線連網的電子;::易:::因此，本發明 性與降低成本。 置上了以牦加組裝的便利 •俨#S本！^之上述特徵和優點能更明顯易懂，下文特與 ，亚配合所附圖式，作詳細說明如下。文特舉較 【實施方式】 Α,. 茲配合圖式詳細說明介紹本發明$ j :;=)式中的相同參考數字⑽表-似:::實 1。。二的天線的結構示意圖。天* 有-第-邊――第:：1灿 別連接接地部u的第f W。主幸昌射部12與屏蔽檣13; 並大致朝同-方^; 與第二邊丨14，且彼此相/ 可以是任何形狀的導體(導體可以蔽牆13 疋+板形狀或片狀的導 1 金屬）’例如，可以 成天線]00。 " 6亥些導體透過前述的連接方式可構 π同時芩考圖】與， _展開結構示意圖。由圖，與圖實施例的天 早片狀導體，例如可士。。 . _ 天線】〇〇亦可由 後，再經由兩次彎折形二^片形成主輕射部]2 構的底部平面，而屏蔽料13㈣中接地部I】為U型結 兩，2彼此相對。延伸方主α目 12同則形成大致平行的 部二影響到主輻射 琛i0〇可以直接設置 5/20 201249001 在金屬物體(例如液晶顯示器的頂部金屬邊框)前面。在本實施 例中，屏蔽牆13的高度較佳是大於或等於主輻射部12的高度 ，但本實施例不受限制。在理論上’屏蔽踏13的面積愈大， 其對主輻射部丨2的屏蔽效果愈好。 主輻射部12具有結構對稱的第一輻射部141與第二輻射 部142，其中第一輻射部141具有第一饋入端151，而第二輻 射部142具有第二饋入端152。天線信號可以經由第一饋入端 151或/及第二饋入端152饋入。天線1〇〇可使用小型同軸線 (mini-cable)來饋入信號’由於第一饋入端151與第二饋入端 152的方向相反’且分別位於天線100的兩側，因此小型同軸 線可以利用不同的佈線方式連接至天線1〇〇。 請參照圖3與圖4,其繪示小型同軸線連接至天線的示意 圖。小型同軸線3〗0的導電銅線(CUpper wire)可以連接至第一 饋入端151 ’其外層的網狀導體層（CUpper mesh)則會接地至接 地部11，如圖3所示。小型同軸線310的導電銅線也可以連 接至第二饋入端152,其外層的網狀導體層會接地至接地部η ’如圖4所示。或者，天線1〇〇也可以同時由第 端，私㈣。本實施例不限制天線_饋入 同^位置='&1的疋’小型同軸線310的網狀導體層可經由不 復夂昭闻、a端123b，本實施例不受限制。 12^ra^^tl2M24,^ ⑵與第四4·=Λ二轄射f 122交又設置，第三輕射臂 臂124分別由主第4射臂122與第四幸畐射 —τ型結構120第% =中_向，方向延伸以形成 第一輪射臂⑵與第三轉射f 6/20 201249001 主輻射部12的兩側向主触部12的中間部分方向延伸以形成 兩個相互對稱的倒L型結構161、162。τ型結構12〇則位於 上述兩個倒L型結構所圍繞的區域之中。 凊麥知、圖2，值得注意的是，在本實施例中，上述相鄰輻 射臂121與122之間、123與124之間的間隙寬度可以分別為 L，而L較佳疋小於或等於2 mm。第一饋入端151與倒乙蜇 結構161之間的間隙較佳是小於或等於2麵，而第二鑛入端 152與倒L型結構162之間的間隙較佳也是小於或等於2 mm 但本貫施例不文限制。 第一韓射臂121與第二輕射臂122之間的間隙會形成-第 二曰:L 2(H ’此第一槽孔2〇1會延伸至第二輻射臂⑶的下方 /三輻射臂】23與第四輕射臂124之間的間隙會形成一第二 曰=〇2’此第二槽孔202#延伸至第四储f⑶的下方。 施例中’第-槽孔201與第二槽孔2〇2相對稱，且具有 是1相同的槽孔寬度，其寬度較佳是小於或等於2画，也就 疋L ’但本實施例不限制於此。 的短Γ的頸部連接於接地部11，第二輻射臂122 的開路端ma向第」_;f2的頸部’且第二鄉 形成第—饋人端丨 的崎端121b的方向延伸並I 201249001 [Disclosed] ι has a double-aged day (4) with its electronic device. Tianyuan/, there are two narrative directions' reading in the money phase, reducing the matching of the adjacent metal objects to the antenna and the t-type of the field type can be + the antenna proposed by the present invention, including the _ grounding portion, - y wall. The main radiating portion is connected to the ground portion m and is symmetric with a screen structure - the first ray-emitting neighbor * @ ά 6彡5 主 main light-emitting portion has a right-different second _------ Mail. has a first feed end, the second light shot = the joint connection: the second side of the ground and the second: ~ shield wall, the first, the = s first division of the ray includes A first lucky shot arm and a first-fortunate 5 shot 劈 苐 苐 细 包括 包括 包括 包括 包括 包括 包括 包括 包括 包括 包括 包括 包括 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三 ^ ^ ^ ^ ^ ^ ^ ^ ^ -, oh again. Further, the middle portion of the second radiating arm music field of the four seasons is extended in the two directions to the fourth arm of the Koda field, and the third arm is configured by the main light arm and the third arm. And the middle portion of the first-emitter portion extends in the direction of the 'radiation 4' to the main spoke, and the gamma/_ field is formed into two mutually inverted inverted L-shaped (9) shielded walls in the domain. The main light-emitting portion is connected to the second portion of the wheel portion and the ground portion and to the main side; the shield step is connected to the antenna, and the antenna can be applied to an electronic multimedia player, a networked electric device, for example, The host computer of the desktop computer, integrated above, this === see box or player. At the end, the two types of coaxial wires can be selected to have two different directions of feed glue attached to the machine member, and the grounding portion of the shielded cowpea antenna can be solved by the back field type. The other line of low-neighbor metal-affected matching and spoke antenna structure can be made by stamping a single piece of metal sheet into a 4/20 201249001 type and bending, and the antenna for the output of the gyroscope β, is applied to the wireless network. Electronics;::Easy::: Therefore, the present invention and the cost reduction. It is convenient to assemble with 牦 俨 S S S S! The above features and advantages can be more clearly understood. The following is a detailed description of the following drawings. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 . A schematic diagram of the structure of the antenna of the second. Day* Yes - Side - Side: : 1 Can Do not connect the f W of the grounding part u. The main Xingchang shot 12 and the shield 樯 13; and generally toward the same side - square ^; and the second side 丨 14, and each other / can be any shape of the conductor (conductor can cover the wall 13 疋 + plate shape or sheet guide 1 metal) 'for example, can be an antenna] 00. " 6 Hai conductors through the aforementioned connection method can be constructed π at the same time 芩 图 】 _ _ _ _ _ _ _ _ _ _ _ _ _ _ From the figure, the early sheet-like conductor of the embodiment of the figure, for example, a gentleman. . _ Antenna] 〇〇 can also be formed from the bottom, and then through the two bending forms to form the bottom plane of the main light-emitting part]2, and the grounding part I of the shielding material 13 (four) is U-shaped two, 2 opposite to each other . The extension of the main alpha eye 12 is formed into a substantially parallel section. The second influences the main radiation. 琛i0〇 can be set directly 5/20 201249001 in front of a metal object (such as the top metal frame of a liquid crystal display). In the present embodiment, the height of the shield wall 13 is preferably greater than or equal to the height of the main radiating portion 12, but the embodiment is not limited. In theory, the larger the area of the shield step 13, the better the shielding effect on the main radiation portion 丨2. The main radiating portion 12 has a first radiating portion 141 and a second radiating portion 142 which are structurally symmetrical, wherein the first radiating portion 141 has a first feeding end 151 and the second radiating portion 142 has a second feeding end 152. The antenna signal can be fed via the first feed end 151 or/and the second feed end 152. The antenna 1〇〇 can use a mini-cable to feed the signal 'because the first feed end 151 is opposite to the second feed end 152' and is located on both sides of the antenna 100, respectively, so the small coaxial line It can be connected to the antenna 1〇〇 using different wiring methods. Referring to Figures 3 and 4, there is shown a schematic view of a small coaxial line connected to an antenna. A conductive copper wire of a small coaxial wire 3 "0" can be connected to the first feed end 151 '. The outer mesh layer of the mesh conductor is grounded to the ground portion 11, as shown in FIG. The conductive copper wire of the small coaxial line 310 can also be connected to the second feed end 152, and the outer mesh conductor layer is grounded to the ground portion η' as shown in FIG. Alternatively, the antenna 1〇〇 can also be made by the first end, private (four). This embodiment does not limit the antenna-feeding of the mesh conductor layer of the compact coaxial line 310 of the same position = '&1'1, and the a-side 123b is not limited. This embodiment is not limited. 12^ra^^tl2M24,^ (2) and the fourth 4·=Λ2 administration f 122 intersection and setting, the third light arm arm 124 is respectively composed of the main fourth arm 122 and the fourth lucky —-τ structure 120%%=middle_direction, extending in direction to form the first wheel arm (2) and the third rotation f 6/20 201249001 Both sides of the main radiation portion 12 extend toward the middle portion of the main contact portion 12 to form two mutual Symmetric inverted L-shaped structures 161, 162. The τ-type structure 12〇 is located in the area surrounded by the two inverted L-shaped structures. Buckwheat, FIG. 2, it should be noted that, in this embodiment, the gap width between the adjacent radiating arms 121 and 122 and between 123 and 124 may be L, and L is preferably less than or equal to 2 mm. The gap between the first feed end 151 and the inverted iridium structure 161 is preferably less than or equal to 2 faces, and the gap between the second mine inlet end 152 and the inverted L-shaped structure 162 is preferably less than or equal to 2 mm. However, this example is not limited. A gap between the first Korean arm 121 and the second light arm 122 may be formed - a second 曰: L 2 (H 'this first slot 2 〇 1 will extend below the second radiating arm (3) / three radiation The gap between the arm 23 and the fourth light arm 124 forms a second 曰=〇2'. The second slot 202# extends below the fourth storage f(3). In the embodiment, the 'slot-hole 201 is The second slot 2〇2 is symmetrical and has the same slot width, and the width thereof is preferably less than or equal to 2, which is 疋L', but the embodiment is not limited thereto. The portion is connected to the ground portion 11, and the open end ma of the second radiating arm 122 extends toward the neck portion of the first _; f2 and the second township forms a direction of the first end of the feed end 121 121 121b and
型姓椹7 射臂124的短路端124b連接於TThe short-circuit end 124b of the type 椹7 arm 124 is connected to the T
構12〇的頸部’且第 而⑽連接方；T Μ臂123的短路端㈣的方向延伸 以虛線160為中心，天妗 第 部’也就是第—韓射部141與第二° =分為兩個_的辕射 、射部141與第二輪射部142“二=就結構而言’The neck portion of the 12" is connected to the first (10) connecting side; the direction of the short-circuiting end (4) of the T-arm arm 123 extends in the direction of the broken line 160, and the first part of the scorpion 'is the first - the second portion 141 and the second ° = minute The projections of the two _, the projection 141 and the second projection 142 "two = in terms of structure"
由兩個父又設置的倒L 7/20 201249001 型結構形成。從另-方面來看，τ型結構12〇也可 倒L型結制結合，本技術烟具有通常知識者應可經個 推知，在此不加贅述。 、田圖1 本實施例之天線100具有多個共振模態，可以提供夕 作頻段。請參照圖5 ’其繪示本實施例的天線1〇〇頻率麴=‘ 。圖5中包括董測與模擬曲線。由圖5可以看出天線1〇〇 i圖 多個頻段，2.4 GHz頻段、5.2 GHz頻段與5.8 GHz頻段具^ 三個頻段的回波損耗(return loss)都可以達到1〇 dB以下這 GHz頻段與5.8 GHz頻段的回波損耗更可以達到14犯γ ^ 值得注意的是，本實施例的天線1〇〇的5.2 GHz頻段範圍 ° 括日本的5 GHz頻段(4.9〜5 GHz)。 更包 頻段 值付注思的疋’本貫施例的天線1 〇〇也可以利用平板会士 (flat structure)的方式（即不具有彎折結構)實現，其具有兩=構 上回波損耗10 dB以上的操作頻段(2.4 GHz、5975 MHz與75二 MHz)，如圖ό所示，其繪示天線1〇〇與平板結構的天線的1Q 率響應圖。由圖ό可以看出，平板結構的天線在24gHz、猶 具有更佳的回波損耗(大於25 dB)。 天線100具有多個不同的表面電流路徑以產生多個 _ 頻段的的共振模態，請參照圖7A〜圖7C，其繪示本實扩不同 天線在三個頻段的表面電流分布示意圖。在圖7A中，ρ ^勺 位於端點A與β之間，即信號由第一饋入端151館 。源 ._ 只 _ 7_Α 表示頻率為2450 MHz的表面電流路徑與方向；圖7β表厂、 率為5975 MHz的表面電流路徑的方向；圖7c表示頻率為^頻 MHz的表面電流路徑與方向。由圖7A可以明顯看出，在 Μ ΜΗ ζ的電流路徑主要環繞在第一輻射臂12丨與第二輕射臂24 5 Q 上，如區域710所示。這個表面電流路徑可以作為一個半 8/20 201249001 圈模態(half-wavelength loop mode)’ 主要是用來教發 2450 MHz 頻段的共振模態。這個表面電流路徑也會對75l〇 MHz的共振 頻段有所貢獻。 由圖7B可以明顯看出，激發5975 MHz頰段的電流路徑 主要環繞在第二輻射臂122與其下方區域，其中標號721與 722表示電流零點（current null)的位置，如區域72〇所示。這個 表面電流路徑可以作為一個全波迴圈模態（〇ne_wavdength loop mode)，主要是用來激發5975 MHz頻段的共振模阼。由 圖7C可以明顯看出，激發7510 MHz頻段的電流路徑^要環 繞在第一輻射臂121與第二輻射臂122 ,其中襟號731、732 表示電流零點（current null)的位置。由圖7C可知，電流雯點位 於第-輻射臂121與第二輻射臂122的中間位置，如區域73〇 所示。這個表面電流路徑可以作為一個全波迴圈模態，主要是 用來激發7510 MHz頻段的共振模態。 、〜' 由圖7A〜圖7C也可以看出，最低共振模態的電流路徑是 經由端點A至端點C以及由端點D經由端點£、f至端點β 。而較高的共振模態的電流路徑是兩邊對稱的，如圖7A〜圖 7C所示。上述共振模態的差異主要在於電流路徑不同。 另，由圖7A〜圖7〇也可以看出天線1〇〇的頻段可以由端 ‘，，、占E、F之么間相距的預設距離d與τ型結構12〇白勺頸部寬度^ 決定。請參照圖8，⑽㈣設距㈣與 2實施例中，以接地部n、主輕射部12與屏蔽牆^寬 度為K)咖，而長度例如㈣_ $例說明，但本實施例不 限制接地部1卜主韓射部12與屏蔽牆13的尺寸。圖8以預 巨離d為4職、8mm、12麵為例進行模擬，上述預設距 離d即為第-輕射臂121的開路端121&與第三幸昌射臂⑵的 9/20 201249001 開路端123a之間的距離。預設距離d主要影響的是η服 頻段的電流路經，預設距離d愈大，其半迴圈路徑較小，所以 2_4 GHz的共振頻段會提高。請參照圖9，其繪示τ型么士構⑽ 的頸部寬度w與對應的頻率響應圖。本實施例中以寬。度w為 8mm、Hmm、16職為例進行模擬，τ型結構12〇的頸^寬度 w主要影響的是5 GHz的高頻共振頻段，其頸部寬度w愈大 ’相對的共振頻段也就愈高。 圖10〜圖12分別繪示本實施例天線1〇〇在操作頻率雙 MHz、525〇 MHz與5775廳下的遠純射 圖12可以看出’天線削有不錯的全向性 騰她）。當天、線1〇〇設置在電子裝置(如液晶電視)的 五屬邊框上時’χ_Ζ平面顧應於天線⑽的垂直面，可以得 到較佳的全向接收效果。特別注意的是，由於具有屏蔽膽13 ，所以天線100在2方向具有最大的輻射強度。 圖13繪示本實施例天線1〇〇的峰值增^輕射效率。在 2.4 GHz紐的峰值增益A約是2 9 _，輪效率大於輕； 在5.2 GHz與5.8 GHz兩個頻段，其峰值增益由* } 至5 3 =，輕=率大於_。上述輕射效率的量測環境可以在測 財驗室中，將輸人功率〇 dBm的信號輸人至天線動，铁後 置測天線100所發射出來的總輕射量。總輻射量與〇 —的 =即為^效率。上述量測與模擬的細節，本技術領域具有 通吊知識者應可由上述實施例的說明中推知，在此不加資述。 在設置天線則時，天線⑽的接地部u可以藉 黏貼在液晶電視的殼體頂部，而屏㈣13可 =框金屬。屏蔽牆】3具有降低背框金屬影響天線⑽3 配人輕射場型的功效，因此可以取得較好的輕射效應。請參照 10/20 201249001 圖14，其繪示天線100的使用示意圖。天線100可以安裝在 液晶電視的螢幕43的頂部並且背靠在後方金屬邊框41上。由 於天線100兩側都可以饋入信號，因此在線路配置上相當方便 〇 (第二實施例） 上述第一實施例的天線100具有對稱的第一輻射部141 與第二輻射部142。在本發明第二實施例中，天線可以僅具有 單一輻射部，請參照圖15，其繪示本發明第二實施例的天線 的結構示意圖。圖1中的天線100結構可以虛線160為中心區 分為兩個天線，其中左邊半部即為天線200。天線200僅具有 第一輻射部241。天線200具有接地部21、主輻射部22與屏 蔽牆23，接地部21具有一第一邊212與一第二邊214,其中 主輻射部22與屏蔽牆23分別連接於接地部21的第一邊212 與第二邊214，並彼此相對，且大致朝相同方向延伸。主輻射 部22僅具有第一輻射臂221與第二輻射臂222。天線200的 細部結構可由上述天線100的說明中推知，在此不加贅述。 請參照圖16，其繪示天線100與天線200的頻率響應比 較圖。在低頻段，天線200的回波損耗較差，而在5 GHz頻段 ，天線200同樣具有10 dB以上的回波損耗，同樣可以適用於 5 GHz頻段。由上述可知，本發明的天線100的一半結構也可 以作為天線使用，只是較適用於5 GHz頻段。在使用上，使用 者可以依照設計需求使用天線100或是天線200，本發明並不 限制。 (第三實施例） 本發明的天線100、200可以應用在各種電子裝置上，例如 是多媒體播放器、連網電視、網路電視盒、桌上型電腦的主機 11/20 201249001 或 DVD(Digital Versatile Disc or Digital Video Disc)播放器等 連網裝置，本實施例不限制電子裝置的類型。請參照圖17a 與圖17B，其繪示本發明第三實施例的電子裝置的示意圖。在 圖17A中’電子裝置901包括主機910與天線1〇〇，主機91〇 可經由天線100的饋入端(如圖1所示之第一饋入端或第 二饋入端152)連接至天線100，並經由天線1〇〇連接至網路以 進行資料傳輸。電子裝置901例如是多媒體播放器、網路電視 盒、DVD播放器或桌上型電腦的主機。在圖17B中，電子妒 置902則以連網電視為例’天線100設置在主機920中，作^ 無線傳輸與接收資料之用。 ’“' 值得注意的是，圖ΠΑ與圖17B中的天線1〇〇也可以利 用圖15中的天線2〇〇取代。本技術領域具有通常知識者經由 上述實施例的說明，應可輕易推知其實施方式，在此不加贅述 夕絲上所述’本發明利用對稱的輻射部結構與屏蔽牆以獲得 夕頻奴的天線，其屏蔽牆具有降低後方金屬體干擾的效果，可 以讓天線獲得較佳的輻射場型與匹配特性。本發明之天線在 2.4 GHz與5 GHz更具有2.9 dBi和4.7 dBi的頻帶增益，龙知 =率分別達到84%和89% ’為電子裝置的内藏式天線解^ 、雖然本發明之較佳實施例已揭露如上，然本發明並不4 =述實施例’任何所祕術領域令具有通常知識者，在^ =發明所揭露之範_，當可作些許之更動與調整，⑽ 之保濩範圍應當以後附之申請專利範圍所界定者為準 12/20 201249001 【圖式簡單說明】 圖1繪示本發明第一實施例的天線的結構示意圖。 . 圖2繪示本發明第一實施例的天線的展開結構示意圖。 . 圖3繪示小型同軸線連接至天線的示意圖。 圖4繪示小型同軸線連接至天線的示意圖。 圖5繪示本實施例的天線100頻率響應圖。 圖6繪示天線100與平板結構的天線的頻率響應圖。 圖7A〜圖7C繪示本實施例的天線在三個頻段的表面電流 分布示意圖。 圖8繪示預設距離d與對應的頻率響應圖。 圖9繪示T型結構120的頸部寬度w與對應的頻率響應 圖。 圖10〜圖12分別繪示本發明第一實施例天線100在操作 頻率2442 MHz、5250 MHz與5775 MHz下的遠場輻射場型。 圖13繪示本發明第一實施例天線100的峰值增益與輻射 效率。 圖14，其繪示天線100的使用示意圖。 圖15繪示本發明第二實施例的天線的結構示意圖。 圖16繪示天線100與天線200的頻率響應比較圖。 圖17A與圖17B繪示本發明第三實施例的電子裝置的示 意圖。 13/20 201249001 【主要元件符號說明】 100 :天線 11、21 :接地部 112、212 :第一邊 114、214 :第二邊 12 :主輻射部 120 : T型結構 121、221 :第一輻射臂 122 ' 222 :第二輻射臂 123 :第三輻射臂 124 :第四輻射臂 121 a〜124a :開路端 121b〜124b :短路端 13 :屏蔽牆 141、241 :第一輻射部 142 :第二輻射部 151 :第一饋入端 152 :第二饋入端 160 :虛線 161、162 :倒L結構 200 :天線 201 :第一槽孔 202 :第二槽孔 21 :接地部 22 :主輻射部 23 :屏蔽牆 201249001 310 :小型同軸線 41 ： 金屬邊框 43 ： 螢幕 720 、730 : 區域 721 、722 : 標號 731 、732 : 標號 901 、902 : 電子裝置 910 、920 : 主機 A〜F :端點 d · 預設距離 w : 頸部寬度 L : 間隙It is formed by two inverted L 7/20 201249001 type structures set by the father. From another point of view, the τ-type structure 12〇 can also be combined with the inverted L-type combination. The person skilled in the art can be inferred by ordinary knowledge, and will not be described here. Field 1 The antenna 100 of this embodiment has a plurality of resonant modes, which can provide a night frequency band. Referring to FIG. 5', the antenna 1〇〇 frequency ‘=' of the present embodiment is illustrated. Figure 5 includes the Dong measurement and simulation curves. It can be seen from Fig. 5 that the antenna 1〇〇i map has multiple frequency bands, and the return loss of the 2.4 GHz band, the 5.2 GHz band and the 5.8 GHz band with three bands can reach below 1 〇 GHz. The return loss of the 5.8 GHz band can reach 14 γ ^. It is worth noting that the 5.2 GHz band of the antenna 1本 of this embodiment includes the 5 GHz band (4.9 to 5 GHz) in Japan. The antenna band 1 of the present embodiment can also be realized by a flat structure (ie, without a bent structure), which has two = configuration return loss. Operating frequency bands above 10 dB (2.4 GHz, 5975 MHz and 75 MHz), as shown in Figure ,, show the 1Q rate response of the antenna 1〇〇 and the flat-panel antenna. It can be seen from the figure that the antenna of the flat structure has a better return loss (greater than 25 dB) at 24 gHz. The antenna 100 has a plurality of different surface current paths to generate a plurality of _ frequency band resonance modes. Referring to FIG. 7A to FIG. 7C, the surface current distribution of the different antennas in the three frequency bands is shown. In Fig. 7A, the ρ ^ scoop is located between the endpoints A and β, i.e., the signal is branched by the first feed terminal 151. Source ._ only _ 7_Α represents the surface current path and direction at a frequency of 2450 MHz; Figure 7 shows the direction of the surface current path at 5975 MHz; Figure 7c shows the surface current path and direction at a frequency of MHz. As is apparent from Fig. 7A, the current path at Μ ζ is mainly around the first radiating arm 12 丨 and the second illuminating arm 24 5 Q as shown by region 710. This surface current path can be used as a half-time 8/20 201249001 half-wavelength loop mode' to mainly teach the resonant mode of the 2450 MHz band. This surface current path also contributes to the resonant frequency band of 75l 〇 MHz. As is apparent from Fig. 7B, the current path for exciting the 5975 MHz buccal segment is mainly around the second radiating arm 122 and its lower region, with reference numerals 721 and 722 indicating the current null position as shown by region 72A. This surface current path can be used as a full-wave modal (〇ne_wavdength loop mode) to excite the resonant mode in the 5975 MHz band. As is apparent from Fig. 7C, the current path for exciting the 7510 MHz band is looped around the first radiating arm 121 and the second radiating arm 122, where the apostrophes 731, 732 represent the current null position. As can be seen from Fig. 7C, the current is located at an intermediate position between the first radiating arm 121 and the second radiating arm 122, as shown by the region 73A. This surface current path can be used as a full-wave loop mode, mainly to excite the resonant mode of the 7510 MHz band. It can also be seen from Fig. 7A to Fig. 7C that the current path of the lowest resonance mode is via the end point A to the end point C and from the end point D via the end points £, f to the end point β. The current path of the higher resonant mode is bilaterally symmetric, as shown in Figures 7A-7C. The difference in the above resonant modes is mainly due to the different current paths. In addition, it can be seen from FIG. 7A to FIG. 7 that the frequency band of the antenna 1〇〇 can be from the end ', the pre-set distance d between the E and F, and the width of the neck of the τ-type structure. ^ Decide. Referring to FIG. 8, (10) and (4) the distance (4) and the second embodiment, the grounding portion n, the main light-emitting portion 12 and the shielding wall width are K), and the length is, for example, (four)_$, but the embodiment does not limit the grounding. The size of the portion 1 main projection portion 12 and the shield wall 13. Fig. 8 is simulated by taking the pre-large distance d as 4th position, 8mm, 12th plane as an example. The preset distance d is the open end 121 of the first-light shot arm 121 and the 9/20 201249001 of the third lucky arm (2). The distance between the open ends 123a. The preset distance d mainly affects the current path of the η service band. The larger the preset distance d is, the smaller the half-loop path is, so the resonance frequency band of 2_4 GHz will increase. Please refer to FIG. 9 , which illustrates the neck width w of the τ-type musculature (10) and the corresponding frequency response diagram. This embodiment is wide. The degree w is 8mm, Hmm, and 16th. For example, the neck width w of the τ-type structure 12〇 mainly affects the high-frequency resonance frequency band of 5 GHz, and the larger the neck width w is, the relative resonance frequency band is also The higher the height. Fig. 10 to Fig. 12 respectively show the far-purity shot of the antenna 1〇〇 of the present embodiment at the operating frequencies of double MHz, 525 〇 MHz and 5775. Fig. 12 shows that the antenna has a good omnidirectionality. On the same day, when the line 1 is placed on the five-genus frame of an electronic device (such as a liquid crystal TV), the χ_Ζ plane takes into account the vertical plane of the antenna (10), and a better omnidirectional reception effect can be obtained. It is particularly noted that the antenna 100 has the largest radiation intensity in the 2 direction due to the shielded bladder 13. FIG. 13 is a diagram showing the peak-increasing efficiency of the antenna 1〇〇 of the present embodiment. The peak gain A at 2.4 GHz is about 2 9 _, and the wheel efficiency is greater than light; in both the 5.2 GHz and 5.8 GHz bands, the peak gain is from * } to 5 3 =, and the light = rate is greater than _. The measurement environment of the above-mentioned light-emission efficiency can be input to the antenna in the measurement laboratory, and the signal of the input power 〇 dBm is input to the antenna, and the total light amount emitted by the antenna 100 is measured after the iron. The total amount of radiation and 〇- is = efficiency. The details of the above measurement and simulation, those skilled in the art should be inferred from the description of the above embodiments, and are not described herein. When the antenna is set, the grounding portion u of the antenna (10) can be attached to the top of the casing of the liquid crystal television, and the screen (4) 13 can be frame metal. The shielding wall]3 has the effect of reducing the metal of the back frame and affecting the antenna (10)3 to match the light field type, so that a better light shot effect can be obtained. Please refer to FIG. 14 of 10/20 201249001, which shows a schematic diagram of the use of the antenna 100. The antenna 100 can be mounted on the top of the screen 43 of the liquid crystal television and backed against the rear metal frame 41. Since the signals can be fed on both sides of the antenna 100, it is quite convenient in the line arrangement. (Second Embodiment) The antenna 100 of the first embodiment described above has the symmetric first radiating portion 141 and the second radiating portion 142. In the second embodiment of the present invention, the antenna may have only a single radiating portion. Referring to Figure 15, a schematic structural view of the antenna according to the second embodiment of the present invention is shown. The structure of the antenna 100 in Fig. 1 can be divided into two antennas by a broken line 160, and the left half is the antenna 200. The antenna 200 has only the first radiating portion 241. The antenna 200 has a grounding portion 21, a main radiating portion 22 and a shielding wall 23. The grounding portion 21 has a first side 212 and a second side 214, wherein the main radiating portion 22 and the shielding wall 23 are respectively connected to the first portion of the ground portion 21. The side 212 and the second side 214 are opposite each other and extend generally in the same direction. The main radiating portion 22 has only the first radiating arm 221 and the second radiating arm 222. The detailed structure of the antenna 200 can be inferred from the description of the antenna 100 described above, and will not be described herein. Referring to FIG. 16, a frequency response comparison diagram of the antenna 100 and the antenna 200 is shown. In the low frequency band, the return loss of the antenna 200 is poor, and in the 5 GHz band, the antenna 200 also has a return loss of 10 dB or more, which is also applicable to the 5 GHz band. As can be seen from the above, the half structure of the antenna 100 of the present invention can also be used as an antenna, but is more suitable for the 5 GHz band. In use, the user can use the antenna 100 or the antenna 200 according to design requirements, and the invention is not limited. (Third Embodiment) The antennas 100, 200 of the present invention can be applied to various electronic devices such as a multimedia player, a networked television, a network television box, a desktop computer host 11/20 201249001 or a DVD (Digital) Versatile Disc or Digital Video Disc) A network device such as a player, and the embodiment does not limit the type of the electronic device. Referring to FIG. 17a and FIG. 17B, a schematic diagram of an electronic device according to a third embodiment of the present invention is shown. In FIG. 17A, the electronic device 901 includes a host 910 and an antenna 1 〇〇, and the host 91 连接 can be connected to the feed end of the antenna 100 (such as the first feed end or the second feed end 152 shown in FIG. 1 ). The antenna 100 is connected to the network via the antenna 1 for data transmission. The electronic device 901 is, for example, a host of a multimedia player, a network television box, a DVD player, or a desktop computer. In Fig. 17B, the electronic device 902 is exemplified by a networked television. The antenna 100 is disposed in the host 920 for wireless transmission and reception of data. '' It is worth noting that the antenna 1 ΠΑ and the antenna 1 图 in FIG. 17B can also be replaced by the antenna 2 图 in FIG. 15. It is easy to infer from the description of the above embodiments by those skilled in the art. The embodiment of the present invention does not add to the description of the present invention. The invention utilizes a symmetrical radiating portion structure and a shield wall to obtain an antenna of a nucleus slave. The shield wall has the effect of reducing the interference of the rear metal body, and the antenna can be obtained. Preferred radiation field type and matching characteristics. The antenna of the present invention has a band gain of 2.9 dBi and 4.7 dBi at 2.4 GHz and 5 GHz, and the known rate is 84% and 89% respectively. Antenna solution, although the preferred embodiment of the present invention has been disclosed above, the present invention is not 4; the embodiment of the present invention is a general knowledge of the field of the invention. To make some changes and adjustments, the scope of the protection of (10) shall be as defined in the scope of the patent application attached later. 12/20 201249001 [Schematic Description] FIG. 1 is a schematic structural view of an antenna according to a first embodiment of the present invention. . 2 is a schematic diagram showing the unfolded structure of the antenna according to the first embodiment of the present invention. Fig. 3 is a schematic diagram showing the connection of a small coaxial line to an antenna. Fig. 4 is a schematic view showing the connection of a small coaxial line to an antenna. Figure 6 is a diagram showing the frequency response of the antenna 100 and the antenna of the flat structure. Figures 7A to 7C are schematic diagrams showing the surface current distribution of the antenna of the present embodiment in three frequency bands. The distance d and the corresponding frequency response diagram are set. Figure 9 shows the neck width w of the T-shaped structure 120 and the corresponding frequency response diagram. Figure 10 to Figure 12 show the antenna 100 of the first embodiment of the present invention at the operating frequency 2442, respectively. Far field radiation pattern at MHz, 5250 MHz and 5775 MHz. Figure 13 is a diagram showing the peak gain and radiation efficiency of the antenna 100 of the first embodiment of the present invention. Figure 14 is a schematic diagram showing the use of the antenna 100. FIG. 16 is a schematic diagram showing the comparison of the frequency response of the antenna 100 and the antenna 200. FIGS. 17A and 17B are schematic diagrams showing an electronic device according to a third embodiment of the present invention. 13/20 201249001 【the Lord Element Symbol Description 100: Antenna 11, 21: Grounding portion 112, 212: First side 114, 214: Second side 12: Main radiating portion 120: T-shaped structure 121, 221: First radiating arm 122' 222: Second radiating arm 123: third radiating arm 124: fourth radiating arm 121a~124a: open end 121b~124b: shorting end 13: shielding wall 141, 241: first radiating portion 142: second radiating portion 151: a feeding end 152: a second feeding end 160: a broken line 161, 162: an inverted L structure 200: an antenna 201: a first slot 202: a second slot 21: a grounding portion 22: a main radiating portion 23: a shielding wall 201249001 310: Small coaxial line 41: Metal frame 43: Screen 720, 730: Area 721, 722: Reference numerals 731, 732: Reference numerals 901, 902: Electronic device 910, 920: Host A to F: End point d · Preset distance w : neck width L : clearance