200818597 九、發明說明： 【發明所屬之技術領域】200818597 IX. Description of the invention: [Technical field to which the invention pertains]
特別是適合應用在I 本發明係關於一種内藏式天線 線通訊產品上的内藏式多頻天線。 【先前技術】 隨者無線通訊的發展，無線網路的應用越來越廣泛， 因此天線的性能便成為影響產品價值的重要關鍵之二。相 關之先前技術包括台灣專利公告第563,274號"雙頻天線” ，其揭示-種利用筆記型電腦液晶螢幕内建的接地面，在 該接地面上設計倒F形天線的例子，不過該天線雖適用於 4 GHz 5 GHz (包合5· 2、5. 8 GHz )雙頻帶操作之無線 區域網路系統，但高頻頻寬僅勉強包含5.2、5.8GHz之頻 帶’使得天線量產時，其製作上之可允許誤差低。為解決 此一問題，我們提出-種内藏式多頻天線的創新設計，該 天線可以多頻操作於_無線區域網路（肌則，不僅可 產生-低頻操作頻帶涵蓋無線區域網路2 4⑶z頻帶（^〜 邊GHz)，更可在高頻操作頻帶產生約ΐδ·之操作頻 =’輕易地涵蓋無線區域網路5GfJz頻帶〔包含5.2GHz頻 ▼ (5.15〜5.35〇112)及5.8(3112;頻帶（5.725〜5 825 (^2)〕之 操作需求，大幅提升量產時本發明天線製作上的可容許誤 差三且本發明天線具有縮小化天線設計之優點，適合應用 於热線通5fl產品上’達成縮小化且多頻操作之通訊功能。 200818597 【發明内容】 如上所述，本發明之目的在於提供一種内藏式多頻天 線的創新設言十，而本發明天線之一實施{列，可以多頻操作 於-無線區域網4，不$可產生一低頻操作頻帶涵蓋 區域網路2.4 0_頁帶（2.4〜2.484孤），更可在高^操; 頻帶產生約L8GHz之操作頻寬，輕易地涵蓋無線區域網路 5GHz頻帶〔包含52GHz頻帶（515〜5 35 gHz )及58邮 頻帶（ 5.725〜5.825 GHz)〕之操作需求，大幅提升量產時本 厂發明天線製作上的可容許誤差，且本發明天線具有縮小化 、天線設計之優點，適合應用於無線通訊產品上，達成縮小 化且多頻操作之通訊功能。本發明天線包含：-接地面， 形狀大致為一矩形，且有一卜古、真緣 〇 ; i 斤呈右一位上 上方邊緣，且在該上方邊緣附 二有-接地點及一短路點；一輻射金屬臂，其形狀大致 二：广位於該接地面之上方邊緣處，其具有一起始 二：ί端’該起始端位於該接地面之上方邊緣處附近， 之饋入點，而該St"定距離，並且為天線 兮和如入原 則大致平仃於該接地面之上方邊緣， -寄生二路：產生天線高頻操作頻帶之-共振模態; 面之上處Li: j大致為—倒1形，位於該接地 路至兮接地处…、一起始端與一末端，該起始端短 之末㈣末端職朝向純射金屬臂 = 延伸’與_射金屬臂之末端具有—第一特定 距離，而該寄生短路金屬 而一兩弟一特疋 低頻操作頻帶之一共振模能：：射金屬臂用以產生天線 、心乂及另一較高頻率之一共振模 200818597 恶，及一饋入傳輸線，用以傳輸訊號，包含：一中心導線 ，連接至該輻射金屬臂之起始端；及一外層接地導體，連 接至孩接地面之接地點；同時該輻射金屬臂及該寄生短路 金屬臂由印刷或蝕刻技術形成於一介質基板上。 在本項没計中，我們可以藉由適當地調整該輻射金屬 癉之長度，產生天線高頻頻帶之一共振模態，而該輻射金 屬臂之長度接近該高頻頻帶之一共振模態中心頻率之〇.15Particularly suitable for use in the present invention is a built-in multi-frequency antenna for a built-in antenna line communication product. [Prior Art] With the development of wireless communication, the application of wireless networks is more and more extensive, so the performance of the antenna becomes an important key factor affecting the value of the product. Related prior art includes Taiwan Patent Publication No. 563,274 "Dual-Frequency Antenna," which discloses an example of using an internal ground plane of a notebook computer LCD screen to design an inverted-F antenna on the ground plane, but the antenna Although it is suitable for 4 GHz 5 GHz (including 5.2, 5. 8 GHz) dual-band operation of the wireless local area network system, but the high-frequency bandwidth only barely includes the 5.2, 5.8 GHz band 'when the antenna is mass-produced, In order to solve this problem, we propose an innovative design of a built-in multi-frequency antenna that can operate in multiple frequencies in a wireless local area network (muscle, not only to generate - low frequency operation) The frequency band covers the wireless local area network 2 4 (3) z band (^ ~ side GHz), and can also generate an operating frequency of about ΐ δ in the high frequency operation band = 'Easy to cover the wireless area network 5GfJz band [including 5.2 GHz frequency ▼ (5.15~ The operational requirements of 5.35〇112) and 5.8(3112; frequency band (5.725~5 825 (^2)) greatly increase the allowable error in the fabrication of the antenna of the present invention during mass production, and the antenna of the present invention has the advantages of reduced antenna design. Suitable for The communication function of reducing and multi-frequency operation is achieved on the hotline 5fl product. 200818597 [Description of the Invention] As described above, an object of the present invention is to provide an innovative design ten of a built-in multi-frequency antenna, and the present invention One of the antennas is implemented {column, which can operate in multiple frequency-wireless area network 4, and can generate a low-frequency operation band covering the area network 2.4 0_page band (2.4~2.484 orphan), and can be operated at a higher level; Produces an operating bandwidth of approximately L8 GHz, easily covering the operation requirements of the 5 GHz band of the wireless local area network (including the 52 GHz band (515 to 5 35 gHz) and 58 post band ( 5.725 to 5.825 GHz)), greatly increasing the mass production time of the factory The invention has the invention of the allowable error in the manufacture of the antenna, and the antenna of the invention has the advantages of downsizing and antenna design, and is suitable for application in a wireless communication product, and achieves a communication function of downsizing and multi-frequency operation. The antenna of the invention comprises: - a ground plane, The shape is substantially a rectangle, and has a shape of abundance and a true edge; i kg is a top upper edge of the right side, and has a grounding point and a short circuit point at the upper edge; a radiating metal arm, Approximately two: widely located at the upper edge of the ground plane, having a starting two: ί end 'the starting end is located near the upper edge of the ground plane, the feeding point, and the St " fixed distance, and The antenna 兮 and the input-in principle are substantially flush with the upper edge of the ground plane, - parasitic two-way: generating a resonant frequency mode of the antenna high-frequency operating band; Li: j above the surface is roughly - inverted 1 shape, located at a grounding path to the grounding point, a starting end and an end end, the starting end of the short end (four) end position toward the pure metal arm = extension 'with the end of the _ shot metal arm has a first specific distance, and the parasitic short metal One or two brothers and one special low frequency operating frequency band resonant mode energy:: the metal arm is used to generate the antenna, the heart and another higher frequency resonant mode 200818597 evil, and a feed transmission line for transmitting signals The method includes: a center wire connected to the beginning end of the radiating metal arm; and an outer grounding conductor connected to the grounding point of the ground contact surface; and the radiating metal arm and the parasitic shorting metal arm are printed or etched The technique is formed on a dielectric substrate. In this item, we can generate a resonant mode of the antenna high frequency band by appropriately adjusting the length of the radiating metal, and the length of the radiating metal arm is close to the resonant mode center of the high frequency band. The frequency of frequency.15
〇· 25波長；以及藉由適當地調整該寄生短路金屬臂之長 度，產生天線低頻操作頻帶之一共振模態以及另一輕高頻 率之-共振模態，㈣寄生短路金屬t與該輻射金屬臂長 度之總和接近該低頻操作頻帶之—共振模態中心頻率之 15 ^ 25波長’再適當地調整該輕射金屬臂與接地面之距 (第圖巾之h!，一般大於15 _ )，且調整該寄生短 路金屬臂與接地面之距離（第丨圖中之匕，一般大於b mm)，同時適當地調整該輻射金屬臂之饋入點與接地面 之距離（第1圖中之t，一般小於2 mm)，及適當地調整 該輻射金屬臂與寄生短路金屬臂之距離（第」圖中之d， 一般小於5 mm )，可以得创肖拉七把& 〇 于幻良好之阻抗匹配，進而獲得足 夠之“作頻寬，即可涵蓋目前無線區域網路所需之μ 頻t及5GHz頻帶之操作需求，且本發明天線具有縮小化 =線，計之優·點，適合應用於無線通訊產品上，達成縮小 化且夕頻操作之通訊功能。 200818597 L實施方式】 茶考弟1圖’本發明之^__ ί# ΐΛ3 -4-' ^ ,^ " 種内滅式多頻天線一實施例 =一接地面13，形狀大致為-矩形，具有—上方邊 且在4上方邊緣131附近具有一接地點132及一 讀點133 ; -賴射金屬臂14，其形狀大致為一倒l形， =於賴地面之上方邊緣131處，其具有一起始端⑷與 末知142 ，忒起始端141位於該接地面之上方邊緣η! 處附近，與該接地面之上方邊緣131具有一第一特定距離 f t，亚且為天線之饋入點141 ，而該末端142則大致平行 於該接地面之上方邊緣131，該輕射金屬臂14用以產生天 線高頻操作頻帶之-共振模態22 ; 一寄生短路金屬臂Μ， 其形狀大致為一倒L形，位於該接地面之上方邊緣ΐ3ι處 ，其具有一起始端151與一末端152，該起始端151短路 至忒接地面之短路點133 ，而該末端152則往朝向該輻射 金屬臂之末端142方向延伸，與該輻射金屬臂之末端142 具有一第二特定距離d，而該寄生短路金屬臂15與該輻射 、金屬臂14用以產生天線低頻操作頻帶之一共振模態21以及 另一較高頻率之一共振模態23 ;及一饋入傳輸線16，用以 傳輸訊號，包含·· 一中心導線161 ，連接至該輻射金屬臂 之起始端141 ;及一外層接地導體162，連接至該接地面 之接地點132。在本實施例！中，該輻射金屬臂14產生之 一共振模態22與由該輻射金屬臂14及該寄生短路金屬臂 所產生之另一較高頻率之共振模態23合成天線之高頻操作 頻帶；且該輕射金屬臂14及該寄生短路金屬臂15由印刷或 200818597 '糊支術衫成铃〜介質基板17上；由以上配置方式可以得 到良好之降机四配，進而獲得足多句之操作頻寬，即可涵芸 目前無線^ 一所需之2.4GH 一帶及5GHz頻帶之操^ :求’且本^天線具有縮小化夭線設計之優點，適用於 ‘、、、、'泉通讯虞'^上，達成縮小化|多頻操作之通訊功能。 第2圖為本發明天線一實施例1的返回損失實驗量測 結果。在實施例1中，我們選擇該接地面13之長度為26〇 、寬度為2〇〇_ ;該轄射金屬f 14之長度為12咖、 (寬度為lmm，而該饋入點141與接地面之上方邊緣131之 距_ t為〇.5軸，且該幸虽射金層臂與接地面之距離^為7 mm ;該寄生短路金屬臂15之長度為21mm、寬度為^ mm ’而該寄生短路金屬臂之末端152與該輕射金屬臂之 末端142之距離d為G.5mm，且該辕射金屬臂與接地面之 】離h2為6.5 _，&饋人傳輪線16為_同軸傳輸線；該介 二基板17為/厚度為0.8 mm之FR4玻璃纖維基板。由所得 實驗結果，在返回損失小於1〇册的定義下，該操作頻寬 、可以涵蓋目前無線區域網路所需之24GHz頻帶（24〜 2.484GHz )及 5GHz 頻帶〔包含52GHz頻帶（515〜5.35 GHz ^及5.8 GHz頻帶（5.725〜5 825 GIiz )〕之操作需求。 第3圖為本發明天線一實施例i在χ_ζ、平面（ 垂直面）及X_y平面（水平面；假設地面平行於X卞平面 )於2450 MHz的天線㈣場型量測結果；$ 4圖為本發明 天線-實施例1在x-z、y-z平面（垂直面）及Η平面 (水平面）於测馳的天線轉射場型量測結果。由量測 200818597 結果可知，天線的主極化輻射均呈現垂直極化（Εθ)特性， 且在：-y丨面（水平面）產生大致為全向性輻射之場型， 滿足無線區域網路系、统之操作需求，同時在巧平面（水 平面）之垂直極化（Εθ)分量與水平極化⑸分量相近，則 具有抵抗複雜環境所產生之多重路徑衰減之功能。 第5圖為本發明天線之第—其他實施例結構圖。本實 施=5與實施例】之不同在於：一幸畐射金屬臂54具有一起 始知541肖一末# 542 ’而在該輻射金屬臂之起始端⑷ ι /、末鳊542之間具有一條支路543 ，且該支路為該輻 射金屬臂54及該寄生短路金屬臂15所包圍。在本實施例5 中，該韓射金屬臂54及該寄生短路金屬臂15由印刷或餘刻 技術形成於-介質基板17上；由以上配置方式可以在天線 局頻頻帶額外產生-共振模態，同時得到良好之阻抗匹配 進而獲彳于足夠之刼作頻寬，即可涵蓋目前無線區域網路 所需之2.4 GHz頻帶及5 GHz頻帶之操作需求，且本發明天 線具有縮小化天線設計之優點，適合應用於無線通訊產品 …上’達成縮小化且多頻操作之通訊功能。 第6圖為本發明天線之第二其他實施例結構圖。本實 施例6與實施例丨之不同在於：一寄生短路金屬臂65具有 一起始端651與一末端652，而在該寄生短路金屬臂之起 始端651與末端652之間具有一條支路幻3，且該支路 653為該輻射金屬臂14及該寄生短路金屬臂65所包圍。在 本貫施例6中，該輻射金屬臂14及該寄生短路金屬臂仍由 印刷或蝕刻技術形成於一介質基板17上；由以上配置方式 200818597 可以在天線低頻頻帶額 之阻抗匹配，進而奶 /、·悲’同時得到良好 線區域網路所需之二二°之#作頻寬’即可涵蓋目前無 且本發明天、‘ :=Z頻帶及5GH嘴之操作需求， 線通訊產品上:、：：：線設計之優點，適合應用於無 第7圖為太多頻操作之通訊功能。 @為本魯明天線之第三 施例7與實施例】之不W认.只叫.、。構圖。本貫 始端州與-末^4Γ 輕射金屬臂74具有一起 與末端742之間“ — = = =金屬臂之起始端741 -具有一起始端寄生短路金屬臂 臂之起始端751盘末端752 而在該寄生短路金屬 本垂浐你丨7 士 ' 之間具有一次之彎折753。在 印刷或.刻技術二 生:路金屬臂75由 方法進:=;、== 即可、、二阻抗匹配，進而獲得足夠之操作頻寬， 门涵盖目則無線區域網路所需之2.4 求，適合應用於無線灿 夕頻細作之通訊功能。 ^ 8 ϋ為本發日月天線之第四其他實施例結本 =父實施例1之不同在於：一輕射金屬臂-及-寄二 1屬臂85均由金屬片沖麗或切割製作而成。由以上配 ‘方式亦可得到良好之阻抗匹配，進而獲得足夠之操作頻 Γ Ρ可涵盍目刖無線區域網路所需之2·4 GHz頻帶及5 #π之麵作需求’適合應用於無線通訊產品上，達成 12 200818597 多頻操作之通訊功能。 以上.兄明中所述之實施例僅為說明本發明之原理及其 ^，而非限制本發明。因此，f於此技術之人士可在^ 違月本毛明之精神對上述實施例進行修改及變化，本發明 之權利範圍應如後述之申請專利範圍所列。 【圖式簡單說明】 第1圖為本發明天線一實施例結構圖。 ^第2圖為本發明天線一實施例之返回損失實驗量測結果。 第3圖為本發明天線一實施例之輻射場型於之量 測結果。 第4圖為本發明天線一實施例之輻射場型於阳⑻腿ζ之量 測結果。 第5圖為本發明天線之第一其他實施例結構圖。 第6圖為本發明天線之第二其他實施例結構圖。 第7圖為本發明天線之第三其他實施例結構圖。 ;第8圖為本發明天線之第四其他實施例結構圖。 【主要元件符號說明】 1 :本發明天線一實施例 13 ·接地面或筆記型電腦液晶螢幕①^^)支撐金屬背板 131 ·接地面之一邊緣 132 :接地點 133 :短路點 13 200818597 _ 14 :輻射金屬臂 141 :輻射金屬臂之起始端(饋入點） 142 :輻射金屬臂之末端 15 :寄生短路金屬臂 151 :寄生短路金屬臂之起始端 152 :寄生短路金屬臂之末端 16 :饋入傳輸線 161 :中心導線 〆 162 :外層接地導體 17 :介質基板 h!:輻射金屬臂與接地面之距離 h2 :寄生短路金屬臂與接地面之距離 t:饋入點與接地面之距離 d:輻射金屬臂與寄生短路金屬臂之距離 21 :低頻頻帶之一共振模態 Γ 22 :高頻頻帶之第一共振模態 23 ·南頻頻帶之弟二共振模悲 5 ··本發明天線之第二其他實施例 54:輻射金屬臂 541 :輻射金屬臂之起始端 542 :輻射金屬臂之末端 543 :輻射金屬臂之一支路 14 200818597 6:本發明天線之第二其他實施例 65 :寄生短路金屬臂 651 :寄生短路金屬臂之起始端 652 :寄生短路金屬臂之末端 653 :寄生短路金屬臂之一支路 7:本發明天線之第三其他實施例 74 :輻射金屬臂 741 ··輻射金屬臂之起始端 "742 :輻射金屬臂之末端 743 :輻射金屬臂之起始端與末端間之一彎折 75 ··寄生短路金屬臂 751 ··寄生短路金屬臂之起始端 752 ··寄生短路金屬臂之末端 753 ··寄生短路金屬臂之起始端與末端間之一彎折 8:本發明天線之第四其他實施例 \ 1 δ4 :輻射金屬臂 841 ··輻射金屬臂之起始端 842:輻射金屬臂之末端 85 :寄生短路金屬臂 851 ··寄生短路金屬臂之起始端 852 ··寄生短路金屬臂之末端 15〇 25 wavelength; and by appropriately adjusting the length of the parasitic short-circuit metal arm, generating one resonant mode of the antenna low-frequency operating band and another light-high frequency-resonant mode, (4) parasitic short-circuit metal t and the radiating metal The sum of the arm lengths is close to the 15^25 wavelength of the resonant mode center frequency of the low frequency operating band', and the distance between the light metal arm and the ground plane is appropriately adjusted (h! of the towel, generally greater than 15 _), And adjusting the distance between the parasitic short-circuit metal arm and the ground plane (the 丨 in the figure, generally greater than b mm), and appropriately adjusting the distance between the feeding point of the radiating metal arm and the ground plane (t in FIG. 1) , generally less than 2 mm), and properly adjust the distance between the radiating metal arm and the parasitic short-circuited metal arm (d in the figure), generally less than 5 mm), which can be used to create the Shaw of the Seven & Impedance matching, in order to obtain sufficient "width", can cover the operation requirements of the current frequency t and 5 GHz band required by the current wireless local area network, and the antenna of the present invention has a reduction = line, which is excellent and suitable for Applied to wireless communication On the product, the communication function of the reduction and the evening frequency operation is achieved. 200818597 L implementation mode] Tea Kaodi 1 picture 'The invention ^__ ί# ΐΛ3 -4-' ^ ,^ " In-house multi-frequency antenna Embodiment = a ground plane 13 having a substantially rectangular shape and having an upper side and having a grounding point 132 and a reading point 133 near the upper edge 131 of the upper surface 131; - a metal arm 14 having a shape substantially Shape, = at the upper edge 131 of the ground, having a starting end (4) and a final 142, the starting end 141 is located near the upper edge η! of the grounding surface, and has a first edge with the upper edge 131 of the grounding surface The specific distance ft is the feed point 141 of the antenna, and the end 142 is substantially parallel to the upper edge 131 of the ground plane. The light metal arm 14 is used to generate the resonant frequency mode 22 of the antenna high frequency operation band. a parasitic short-circuited metal arm Μ having a substantially inverted L shape, located at an upper edge ΐ3ι of the ground plane, having a starting end 151 and an end 152, the starting end 151 being short-circuited to a short-circuit point 133 of the ground plane And the end 152 is directed toward the radiation gold The end 142 of the arm extends in a direction with a second specific distance d from the end 142 of the radiating metal arm, and the parasitic shorting metal arm 15 and the radiating metal arm 14 are used to generate a resonant mode 21 of the low frequency operating band of the antenna. And a resonant mode 23 of another higher frequency; and a feed transmission line 16 for transmitting signals, including a center conductor 161 connected to the start end 141 of the radiating metal arm; and an outer ground conductor 162 Connected to the grounding point 132 of the ground plane. In this embodiment!, the radiating metal arm 14 produces a resonant mode 22 and another higher generated by the radiating metal arm 14 and the parasitic shorting metal arm. The resonant mode of the frequency 23 synthesizes the high frequency operating band of the antenna; and the light metal arm 14 and the parasitic short metal arm 15 are printed or 200818597 'pastes into the bell to the dielectric substrate 17; Get a good drop-off four-match, and then get the operating bandwidth of more than one sentence, you can cover the current 2.4GH band and 5GHz band required by the current wireless ^ ^ 求 ' and this ^ antenna has a reduced 夭 line Design excellence For ',,,,' on Yu Quan communication '^ reached downsizing | communication functions of multi-frequency operation. Fig. 2 is a graph showing the results of the return loss test of the antenna of the first embodiment of the present invention. In Embodiment 1, we select the ground plane 13 to have a length of 26 〇 and a width of 2 〇〇 _; the length of the urging metal f 14 is 12 咖, (the width is 1 mm, and the feed point 141 is connected The distance _ t of the upper edge 131 of the ground is 〇.5 axis, and the distance between the gold-emitting arm and the ground plane is 7 mm; the length of the parasitic short-circuit metal arm 15 is 21 mm and the width is ^ mm ' The distance d between the end 152 of the parasitic short-circuited metal arm and the end 142 of the light-emitting metal arm is G.5 mm, and the radiant metal arm and the ground plane are 6.5 _ from the h2, and the feed line 16 is fed. The _ coaxial transmission line; the second substrate 17 is / FR4 glass fiber substrate with a thickness of 0.8 mm. From the experimental results, under the definition of return loss less than 1 ,, the operation bandwidth can cover the current wireless local area network The required 24 GHz band (24 to 2.484 GHz) and the 5 GHz band (including the operation requirements of the 52 GHz band (515 to 5.35 GHz ^ and 5.8 GHz band (5.725 to 5 825 GIiz)). FIG. 3 is an embodiment of the antenna of the present invention. i in χ_ζ, plane (vertical plane) and X_y plane (horizontal plane; assuming the ground is parallel to the X卞 plane) at 2 450 MHz antenna (4) field type measurement results; $4 figure is the measurement result of the antenna rotation field of the antenna of the invention - the first embodiment in the xz, yz plane (vertical plane) and the Η plane (horizontal plane). Measuring 200818597 results show that the main polarized radiation of the antenna exhibits vertical polarization (Εθ) characteristics, and produces a field of approximately omnidirectional radiation in the :yy plane (horizontal plane), satisfying the wireless local area network, The operational requirements of the system, while the vertical polarization (Εθ) component of the coincidence plane (horizontal plane) is similar to the horizontal polarization (5) component, it has the function of resisting multiple path attenuation generated by complex environments. Figure 5 is the antenna of the present invention. The structure of the other embodiment. The difference between the present embodiment and the embodiment is that a lucky metal arm 54 has a starting point 541 xiao yi # 542 ' at the beginning end of the radiant metal arm (4) ι /, There is a branch 543 between the end 542, and the branch is surrounded by the radiating metal arm 54 and the parasitic short-circuit metal arm 15. In the fifth embodiment, the Korean metal arm 54 and the parasitic short-circuit metal arm 15 by printing or engraving technology Formed on the dielectric substrate 17; by the above configuration, an additional -resonance mode can be generated in the local frequency band of the antenna, and a good impedance matching is obtained, thereby obtaining sufficient bandwidth to cover the current wireless local area network. The required operating requirements of the 2.4 GHz band and the 5 GHz band, and the antenna of the present invention have the advantages of reduced antenna design, and are suitable for use in wireless communication products...to achieve a reduced and multi-frequency communication function. Figure 6 A structural view of a second other embodiment of the antenna of the present invention. The sixth embodiment differs from the embodiment in that a parasitic short metal arm 65 has a starting end 651 and an end 652, and a branch imaginary 3 is formed between the starting end 651 and the end 652 of the parasitic shorting metal arm. The branch 653 is surrounded by the radiating metal arm 14 and the parasitic short metal arm 65. In the present embodiment 6, the radiating metal arm 14 and the parasitic short-circuiting metal arm are still formed on a dielectric substrate 17 by printing or etching techniques; by the above configuration method 200818597, the impedance of the antenna low-frequency band can be matched, and then the milk /, · sorrow 'at the same time get the good line area network required by the two -2 ° bandwidth" can cover the current and the invention: '==Z band and 5GH mouth operation requirements, line communication products :, ::: The advantages of line design, suitable for communication functions without too much frequency operation in Figure 7. The third embodiment of the present Luming antenna is not recognized by the example 7 and the embodiment. It is only called . Composition. The light-emitting metal arm 74 has a light-emitting metal arm 74 having a start end 741 between the end and the end 742 - having a start end parasitic short-circuit metal arm end 751 end 752 The parasitic short-circuit metal is coveted by you 丨7 士' has a bend between the 753. In the printing or engraving technique two students: the road metal arm 75 by the method: =;, == can,, two impedance matching In order to obtain sufficient operation bandwidth, the gate covers the 2.4 requirements of the wireless local area network, and is suitable for the wireless Canton frequency communication function. ^ 8 第四 The fourth other embodiment of the antenna for the sun and the moon The difference between the parent and the parent embodiment is that a light-emitting metal arm-and-sending two-arm arm 85 is made of a metal sheet, or a good impedance matching can be obtained by the above method. In addition, sufficient operating frequency can be obtained. The requirements of the 2·4 GHz band and the 5 #π surface required for the wireless local area network are suitable for wireless communication products, and 12 200818597 multi-frequency operation communication is achieved. Function. The embodiment described in the above brothers is only for explanation. The invention may be modified and changed in the spirit of the invention, and the scope of the invention should be as described below. BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] FIG. 1 is a structural diagram of an embodiment of an antenna according to the present invention. FIG. 2 is an experimental result of return loss of an antenna according to an embodiment of the present invention. The radiation field type of the embodiment is used to measure the result. Fig. 4 is a measurement result of the radiation field type Yuyang (8) leg 一 according to an embodiment of the antenna of the present invention. Fig. 5 is the structure of the first other embodiment of the antenna of the present invention. Figure 6 is a structural view of a second embodiment of the antenna of the present invention. Figure 7 is a structural view of a third embodiment of the antenna of the present invention. Figure 8 is a structural view of a fourth embodiment of the antenna of the present invention. [Main component symbol description] 1 : Antenna of the present invention is an embodiment 13 · Ground plane or notebook computer LCD screen 1 ^ ^) Support metal back plate 131 · One edge of ground plane 132 : Ground point 133 : Short circuit point 13 200818597 _ 14 : Radiation The arm 141: the starting end of the radiating metal arm (feeding point) 142: the end of the radiating metal arm 15: the parasitic shorting metal arm 151: the starting end of the parasitic shorting metal arm 152: the end of the parasitic shorting metal arm 16: feeding the transmission line 161: center lead 〆 162 : outer ground conductor 17 : dielectric substrate h!: distance between radiating metal arm and ground plane h2 : distance between parasitic short metal arm and ground plane t: distance between feed point and ground plane d: radiated metal The distance between the arm and the parasitic short-circuited metal arm 21: one of the low-frequency band resonance modes Γ 22: the first resonance mode of the high-frequency band 23 · the second frequency band of the south frequency band resonance mode 5 · the second antenna of the present invention Embodiment 54: Radiation Metal Arm 541: Radiation Metal Arm Start End 542: Radiation Metal Arm End 543: Radiation Metal Arm One Branch 14 200818597 6: Second Other Embodiment of Antenna of the Invention 65: Parasitic Short Circuit Metal Arm 651: the beginning end of the parasitic short-circuited metal arm 652: the end of the parasitic short-circuited metal arm 653: one of the parasitic short-circuited metal arms 7: the third other embodiment of the antenna of the present invention 74: the radiating metal arm 741 · the radiating metal arm The beginning "742: the end of the radiating metal arm 743: one of the starting end and the end of the radiating metal arm is bent 75 ··Parasitic shorting metal arm 751 ··The starting end of the parasitic shorting metal arm 752 ··Parasitic shorting metal arm End 753 ·· Parasitic shorting of one of the starting end and end of the metal arm 8: Other fourth embodiment of the antenna of the invention \ 1 δ4 : radiating metal arm 841 · · Starting end of radiating metal arm 842: radiating metal arm End 85: Parasitic short-circuit metal arm 851 ·· Parasitic short-circuit metal arm start end 852 ··Parasitic short-circuit metal arm end 15