M331774 八、新型說明： 【新型所屬之技術領域】 本創作涉及一種雙頻天線，尤其涉及一種用於筆記型 電腦上的雙頻天線。 【先前技術】 按，隨著通訊技術的迅猛發展，筆記型電腦已廣泛應 用於日常工作和生活中，特別是可以接入無線局域網 ” Φ (Wireless Local Area Network, WLAN )工作的筆記型電腦 - 越來越受到消費者的歡迎。目前，無線局域網大多採用藍 芽（Bluetooth)技術標準或IEEE802.il系列標準，藍芽技術 標準中天線的工作頻段為2.4GHz; IEEE802.il系列標準中 天線的工作頻段為2.4GHz和5.2GHz，因此應用於筆記型 電腦中的天線大多可在2.4GHz和5.2GHz頻段範圍内工作。 用於筆記型電腦的天線大致可分為外置式天線和内藏 ❿· 式天線，而外置式天線因影響筆記型電腦的造型美觀且其 易受外界物體碰撞而發生彎曲、變形甚至折斷，因此外置 式天線已逐漸被内藏式天線所取替。然而由於筆記型電腦 的體積日趨小型化，筆記型電腦内中可用於安裝天線的空 間也越來越小，因此設計一種體積小的筆記型電腦用内藏 式天線已成為亟待解決的課題。 【新型内容】 本創作之目的係針對上述習知技術存在之缺陷提供一 5 M331774 種體積小的雙頻天線。 部、二::上述目的，本劍作之雙頻天線包括基部、接地 。卜饋入部、第一輻射部 接地 =有-第第； 延仰占…』’5亥接地部之另一端垂直於該接地部 >所述第-輕射部。該饋人部與所述 置:且該饋入部鄰近於基部的-端設置有一饋入點二 入部之另一端垂直於該饋入部 貝 所述第二㈣μ w f且朝㈣―輪射部延伸形成 D “苐―輪射部的末端與第—輕射部的末 _ °該饋人部之延伸有第二助部La =輕射部的延伸方向相反的方向延伸形成所述第=射 如上所述，本創作雙頻天線係藉由將第_輕射 端與第二姉部的末端鄰近設置，使第1射部譜振出一 料為2.4GHz的電磁波以提供—附加魏，從而能減小收 毛頻率為2.4GHz f磁波訊號的第二姉部的體積，進而減 小該雙頻天線的體積。 〆 【實施方式】 為詳細說明本創作之技術内容、構造特徵、所達成目 的及功效，以下茲例舉實施例並配合圖式詳予說明。 請參閱第-圖，本創作雙頻天線i係由印刷電路板上 M331774 的銅箔蝕刻而成，該雙頻天線1具有一基部10，該基部10 大致呈矩形板狀，該基部10具有第一側沿11及與第一側 沿11垂直連接的第二側沿12。所述第二側沿12之鄰近第 一側沿11的一端垂直於該第二側沿12向外延伸有一延伸 部13。所述第一側沿11鄰近於延伸部13的一端垂直於該 第一側沿11向外延伸有一接地部20，該接地部20連接於 基部10的一端設置有一接地點21。該接地部20的末端沿 與延伸部13的延伸方向相反的方向垂直延伸有一平行於第 一側沿11的第一輻射部30。 一饋入部40與所述接地部20並列平行設置，且該饋 入部40鄰近於基部10之第一側沿11的另一端並與該第一 侧沿11間隔一間隙。該饋入部40之鄰近於基部10的一端 設置有一饋入點41。 所述饋入部40的另一端垂直於該饋入部40並朝向第 一輻射部30延伸有一寬度與第一輻射部30的寬度大致相 等的第二輻射部50,且該端背向第一輻射部30延伸有一與 第二輻射部50的寬度相同的且長度小於第二輻射部50長 度的第三輻射部60。該第二輻射部50的末端與第一輻射部 30的末端相對設置，從而所述第二輻射部50的兩側與第一 輻射部30的兩側基本平齊，且第二輻射部50的末端與第 一輻射部30的末端之間形成有一間隙。 本創作雙頻天線1用於通訊時，第二輻射部50諧振出 7 M331774 一頻率為2.4GHz的電磁波，由於第一輻射部3〇之末端鄰 近於第二輻射部50之末端，第一輻射部3〇亦諧振出一頻 率為2.4GHz的附加的電磁波，從而增加第二_射邱％收 發頻率為2.4GHz之電磁波訊號的靈敏度。笛- ^弟二輻射部60 與頻率為5.2GHz的電磁波譜振而收發頻率為5 之電 磁波訊號。 綜上所述，本創作雙頻天線丨係藉由將第一輻射部川 的末端與第二㈣部5〇的末端鄰近設置，使第—輕射部 譜振出-頻率為2.4GHZ的電磁波以提供—附加譜振，^而 能減小收發頻率為2.4GHZ電磁波職的第二_部5Q的 體積’進而減小該雙頻天線丨的體積。 【圖式簡單說明】 第一圖係本創作雙頻天線的結構示意圖。 【主要元件符號說明】 雙頻天線 1 第一側沿 11 延伸部 13 接地點 21 饋入部 40 第二輻射部 50 基部 10 第二側沿 12 接地部 20 第一輻射部 30 饋入點 41 第三輻射部 60M331774 VIII. New Description: [New Technology Field] This creation relates to a dual-band antenna, and more particularly to a dual-band antenna for use on a notebook computer. [Prior Art] According to the rapid development of communication technology, notebook computers have been widely used in daily work and life, especially for notebook computers that can access wireless local area network (Wireless Local Area Network, WLAN). It is more and more popular among consumers. At present, most of the wireless LAN adopts the Bluetooth technology standard or the IEEE802.il series standard. The working frequency band of the antenna in the Bluetooth technology standard is 2.4GHz; the antenna of the IEEE802.il series standard The operating frequency bands are 2.4 GHz and 5.2 GHz, so most of the antennas used in notebook computers can work in the 2.4 GHz and 5.2 GHz frequency bands. Antennas for notebook computers can be roughly divided into external antennas and built-in antennas. Antenna, and the external antenna is bent, deformed or even broken due to the influence of the appearance of the notebook computer and its vulnerability to external objects. Therefore, the external antenna has been gradually replaced by the built-in antenna. However, due to the notebook computer The size of the notebook is becoming smaller and smaller, and the space available for installing the antenna in the notebook computer is getting smaller and smaller, so designing a body The built-in antenna for notebook computers has become an urgent problem to be solved. [New content] The purpose of this creation is to provide a 5 M331774 small-sized dual-frequency antenna for the defects of the above-mentioned conventional technologies. :: The above purpose, the dual-frequency antenna of the sword includes the base and the ground. The feeding part, the first radiating part is grounded = there is - the first; the extension is occupied... the other end of the '5H grounding part is perpendicular to the grounding part > the first light portion; the feeding portion and the setting: and the feeding portion is disposed adjacent to the end of the base with a feeding point dimerging portion and the other end is perpendicular to the feeding portion to the second (four) μ Wf and toward (4) - the projection portion extends to form D "苐 - the end of the wheel portion and the end of the first light portion _ ° the extension of the feed portion has the second auxiliary portion La = the opposite direction of the extension of the light-emitting portion The direction extension forms the first shot. As described above, the dual-frequency antenna of the present invention is configured such that the first shot is excited to emit an electromagnetic wave of 2.4 GHz by arranging the first light-emitting end adjacent to the end of the second side. To provide - add Wei, which can reduce the hair collection frequency to 2.4GHz f magnetic wave Percent of the volume of the second portion, and further reduce the small dual-band antenna. [Embodiment] In order to explain the technical contents, structural features, objectives and effects of the present invention in detail, the embodiments are described below in detail with reference to the drawings. Referring to the first figure, the dual-band antenna i is formed by etching a copper foil of M331774 on a printed circuit board. The dual-frequency antenna 1 has a base portion 10, and the base portion 10 has a substantially rectangular plate shape, and the base portion 10 has a first portion. One side is along 11 and a second side edge 12 is perpendicularly connected to the first side edge 11. An extension 13 extends outwardly from an end of the second side edge 12 adjacent to the first side edge 11 perpendicular to the second side edge 12. A first portion of the first side edge 11 adjacent to the extending portion 13 extends perpendicularly to the first side edge 11 and has a grounding portion 20. The grounding portion 20 is connected to one end of the base portion 10 and has a grounding point 21. The end of the land portion 20 extends vertically in a direction opposite to the direction in which the extending portion 13 extends, and has a first radiating portion 30 parallel to the first side edge 11. A feed portion 40 is disposed in parallel with the ground portion 20, and the feed portion 40 is adjacent to the other end of the first side edge 11 of the base portion 10 and spaced apart from the first side edge 11 by a gap. A feed point 41 is provided at one end of the feed portion 40 adjacent to the base 10. The other end of the feeding portion 40 is perpendicular to the feeding portion 40 and extends toward the first radiating portion 30 with a second radiating portion 50 having a width substantially equal to the width of the first radiating portion 30, and the end faces away from the first radiating portion 30 extends a third radiating portion 60 having the same width as the second radiating portion 50 and having a length smaller than the length of the second radiating portion 50. The end of the second radiating portion 50 is disposed opposite to the end of the first radiating portion 30, so that both sides of the second radiating portion 50 are substantially flush with both sides of the first radiating portion 30, and the second radiating portion 50 is A gap is formed between the end and the end of the first radiating portion 30. When the dual-frequency antenna 1 is used for communication, the second radiating portion 50 resonates 7 M331774 with an electromagnetic wave having a frequency of 2.4 GHz, since the end of the first radiating portion 3 is adjacent to the end of the second radiating portion 50, the first radiation The portion 3 谐振 also resonates with an additional electromagnetic wave having a frequency of 2.4 GHz, thereby increasing the sensitivity of the electromagnetic signal of the second _ _ _ _ % transmission frequency of 2.4 GHz. The flute-radio part 60 radiates and transmits a frequency of 5 electromagnetic waves with an electromagnetic wave having a frequency of 5.2 GHz. In summary, the dual-frequency antenna system of the present invention is configured such that the end of the first radiating portion is adjacent to the end of the second (four) portion 5〇, so that the first light-emitting portion is excited to emit electromagnetic waves having a frequency of 2.4 GHz. Providing - additional spectral vibration, can reduce the transmission and reception frequency of the second _ part 5Q of the electromagnetic wave of 2.4 GHz, and thereby reduce the volume of the dual-frequency antenna 丨. [Simple description of the diagram] The first diagram is a schematic diagram of the structure of the dual-frequency antenna. [Main component symbol description] Dual-frequency antenna 1 First side edge 11 Extension portion 13 Ground point 21 Feeding portion 40 Second radiation portion 50 Base portion 10 Second side edge 12 Ground portion 20 First radiation portion 30 Feed point 41 Third Radiation part 60