M343257 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，尤其涉及一種區域網路用 的雙頻天線。 【先前技術】 按，無線區域網路通訊協議主要包括IEEE802.11a和 IEEE802.11b兩種標準，其中IEEE802.11a的工作頻段涵蓋 • 5·1〜5.8GHz，而IEEE802.11b的工作頻段主要為 2.4〜2.5GHz 〇 為了使通訊設備能夠兼容IEEE802.11a和IEEE802.11b 兩種標準，需要使用雙頻或多頻天線，平面倒F型天線 (Planar Inverted_F Antenna，PIFA )就是移動設備常用的一 種小型化内置雙頻天線。但由於天線的頻帶寬度、增益值 及輻射效率皆與體積成正比，將天線平面化和小型化，其 瞻頻帶寬度和輻射效率均會減少，因此，平面倒F型天線構 成的雙頻天線，其工作頻帶往往無法同時覆蓋IEEE8〇2 Ua 和IEEE802.11b的工作頻段範圍。 解決上述問題的一種方法係採用兩種或兩種以上天線 相結合的方式，可參閱中國大陸專利公告第26〇〇925號所 示的雙頻天線，该雙頻天線同時包括平面倒F型天線和環 形天線。由於採用這樣兩種不同的天線結構，這種雙頻天 線工作頻段可調整的範圍較大，可同時覆蓋IEEE⑼ma M343257 2輸G2.llb的工作頻段範圍，然而此種天線 的需要。^仏大，不利於電子產品朝向小型化發展 【新型内容】 種之目的係針對上述習知技術存在之缺陷提供-種結構間早且佔用空間小的雙頻天線。 為= 上述目的’本創作之雙頻天線包括接地部、轉 /連接。卩、天線部、接地點及饋人點。該接地部 一側緣’侧緣兩端分別朝同一側延伸有相: :定位部和第二定位部。耦合部自第-定位 :的-側緣朝向第二定位部延伸而成。連接部自第二定位 =一側緣朝向第1位部延伸而成。天線部自連接部一 則緣朝向m部延伸而成’天線部具有朝向第 部延伸而叙相互平行設置的第—天線部及第二天線部。 如上所述’本創作雙頻天線結構簡單、佔用空間小， 魏了電子產品日益輕、薄、短、小的發展趨勢:^收 發無線區域網路通訊協議所包括的邮 IEEE802.11b涵蓋的電磁波頻段範圍。 淨 【實施方式】 為詳細說明本創作之技術内容、構造特徵 的及功效’以下I!例舉實施例並配合圖式詳予說明。 請參閱第一圖，該雙頻天線1具有-長條狀的接地部 6 M343257 1〇雜地β 10具有一侧緣11。該侧缘n 直接地部Η)彎折延伸出—第一定位^表11的兩端分別垂 13。第一定位部12及第二〜 ° 12和—第二定位部 於接地1 10 Μη —部13皆呈矩形狀，且皆位 ==的同一側。第—及第二定位部& -有-疋位孔14。第一定位部。之 /開 13垂直延伸有—呈長條狀的搞合部加。、’、。疋位口Ρ 地.二二近相應的定位孔14處設有-接 X乐_疋位部1 3具有一内。 18 ^ I 円側緣18，自該内侧緣 連接接地部1G的—端朝向第—心部12垂直延伸有 接心，該連接部17向第—^位部12方向且同時向 —指方向延伸有天線部3G。天線部3()具有朝向第一 疋位部12延伸的第—天線部31和第二天線部32。該第一 =部31和第二天線部32相互平行設置且皆呈長條狀。 弟一天線部31與第二天線部32之間形成有—隔槽％。天 線⑷3〇與第二定位部13及側、緣11之間和輕合部20與側 緣U之間間隔一距離。天線部3〇於鄰近第二定位部η且 ^近侧緣11處設置有一饋入點19。 本創作雙頻天線1通過定位孔14固定於電子產品上， 该雙頻天線1用於通訊時，饋入點19到第一天線部31之 間的天線部分與2.4GHz〜2.5GHz頻段的電磁波共振而收發 GHz〜2.5GHz頻段的電磁波訊號。饋入點19到第二天線 F &之間的天線部分與4.9GHz〜5.2GHz頻段的電磁波共 M343257 振而收發4.9GHz〜5.2GHz頻段的電磁波訊號。耦合部20 與第一天線部31之間產生|禺合效應，而能收發 4.9GHz〜5.8GHz頻段的電磁波訊號。耦合部20與第二天線 部32之間產生共振，共振出的電磁波頻段相互重疊，而使 得頻寬增加，而使雙頻天線1收發訊號的增益得到提升。 綜上所述，本創作雙頻天線1藉由第一天線部31、第 二天線部32及耦合部20以收發2.4GHz〜2.5GHz頻段和 參 4.9GHz〜5.8GHz頻段的電磁波訊號，從而其結構簡單、佔 用二間少，適應了電子產品日益輕、薄、短、小的發展趨 勢，且可收發無線區域網路通訊協議所包括的⑽m^ 和IEEE802.11b涵蓋的電磁波頻段範圍。 【圖式簡單說明】 第一圖係本創作雙頻天線的立體圖。 【主要元件符號說明】 雙頻天線 1 接地部 10 側緣 11 第一定位部 12 第二定位部 13 定位孔 14 接地點 16 連接部 17 内側緣 18 饋入點 19 耦合部 20 天線部 30 第一天線部 隔槽 31 33 第二天線部 32M343257 VIII. New description: [New technical field] The present invention relates to a dual-frequency antenna, and more particularly to a dual-frequency antenna for a regional network. [Prior Art] According to the wireless local area network communication protocol, it mainly includes IEEE802.11a and IEEE802.11b standards. The working frequency band of IEEE802.11a covers 5.2~5.8GHz, while the working frequency band of IEEE802.11b is mainly 2.4~2.5GHz 〇 In order to make communication equipment compatible with IEEE802.11a and IEEE802.11b standards, dual-frequency or multi-frequency antennas are needed. Planar Inverted-F Antenna (PIFA) is a small type commonly used in mobile devices. Built-in dual-band antenna. However, since the bandwidth, gain value, and radiation efficiency of the antenna are proportional to the volume, the antenna is planarized and miniaturized, and the bandwidth and radiation efficiency are reduced. Therefore, the dual-frequency antenna composed of the planar inverted-F antenna is Its operating frequency band often cannot cover the working frequency range of IEEE8〇2 Ua and IEEE802.11b at the same time. One method for solving the above problem is to use a combination of two or more antennas. For the dual-frequency antenna shown in Chinese Patent Publication No. 26〇〇925, the dual-frequency antenna includes a planar inverted-F antenna. And loop antenna. Due to the use of such two different antenna structures, the dual-frequency antenna operating frequency range can be adjusted to a large extent, and can simultaneously cover the operating frequency range of the IEEE(9)ma M343257 2 transmission G2.llb, however, the needs of such an antenna. ^ Large, is not conducive to the development of electronic products towards miniaturization [New content] The purpose of the species is to provide a dual-frequency antenna with early structure and small space for the defects of the above-mentioned conventional technologies. For the above purpose, the dual-frequency antenna of the present invention includes a grounding portion, a turn/connection.卩, antenna section, grounding point and feed point. The two sides of the side edge of the one side edge of the ground portion extend toward the same side with a phase: a positioning portion and a second positioning portion. The coupling portion extends from the side edge of the first-position: toward the second positioning portion. The connecting portion is formed from the second positioning = one side edge toward the first position. The antenna portion extends from the other edge of the connecting portion toward the m portion. The antenna portion has a first antenna portion and a second antenna portion which are extended in parallel with each other and are disposed in parallel with each other. As mentioned above, the dual-frequency antenna of this creation has a simple structure and a small footprint. Wei's electronic products are becoming lighter, thinner, shorter, and smaller. The electromagnetic wave covered by the IEEE802.11b included in the wireless local area network communication protocol is transmitted and received. Frequency range. [Embodiment] The technical contents, structural features, and effects of the present invention will be described in detail. The following examples are given to illustrate the embodiments and are described in detail with reference to the drawings. Referring to the first figure, the dual-band antenna 1 has a long strip-shaped ground portion. 6 M343257 1 The noisy ground β 10 has a side edge 11. The side edge n is directly bent and extended—the two ends of the first positioning table 11 are respectively dropped 13 . The first positioning portion 12 and the second portion ～12 and the second positioning portion are both formed in a rectangular shape on the ground 1 10 Μ η portion 13 and are on the same side of the position ==. The first and second positioning portions & - have - clamping holes 14. The first positioning portion. / / 13 vertical extension - there is a long strip of engagement. , ',.疋 Ρ . . 二 二 二 二 二 二 二 近 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应 相应18 ^ I 円 side edge 18, the end from which the inner edge is connected to the ground portion 1G extends perpendicularly to the first core portion 12, and the connecting portion 17 extends toward the first portion 12 and simultaneously toward the direction of the finger There is an antenna portion 3G. The antenna portion 3 () has a first antenna portion 31 and a second antenna portion 32 that extend toward the first clamp portion 12. The first = portion 31 and the second antenna portion 32 are disposed in parallel with each other and are elongated. A spacer % is formed between the antenna portion 31 and the second antenna portion 32. The antenna (4) 3 is spaced apart from the second positioning portion 13 and the side, the edge 11 and the light fitting portion 20 and the side edge U by a distance. The antenna portion 3 is disposed adjacent to the second positioning portion η and is provided with a feed point 19 at the proximal edge 11. The dual-frequency antenna 1 of the present invention is fixed on an electronic product through a positioning hole 14 for communication, the antenna portion between the feeding point 19 and the first antenna portion 31 and the frequency band of 2.4 GHz to 2.5 GHz. The electromagnetic wave resonates and transmits and receives electromagnetic wave signals in the GHz to 2.5 GHz band. The antenna portion between the feed point 19 and the second antenna F & and the electromagnetic wave of the 4.9 GHz to 5.2 GHz band are oscillated to transmit and receive electromagnetic wave signals in the frequency band of 4.9 GHz to 5.2 GHz. The coupling portion 20 and the first antenna portion 31 generate a |couple effect, and can transmit and receive electromagnetic wave signals in the frequency band of 4.9 GHz to 5.8 GHz. Resonance occurs between the coupling portion 20 and the second antenna portion 32, and the resonant electromagnetic wave bands overlap each other, so that the bandwidth is increased, and the gain of the transmission and reception signals of the dual-frequency antenna 1 is improved. In summary, the dual-band antenna 1 of the present invention transmits and receives the electromagnetic wave signals in the frequency band of 2.4 GHz to 2.5 GHz and the frequency band of 4.9 GHz to 5.8 GHz by the first antenna unit 31, the second antenna unit 32, and the coupling unit 20. Therefore, the structure is simple, occupying two less, adapting to the increasingly light, thin, short and small development trend of electronic products, and can transmit and receive the electromagnetic wave frequency range covered by (10) m^ and IEEE802.11b included in the wireless local area network communication protocol. [Simple description of the diagram] The first picture is a perspective view of the dual-band antenna. [Main component symbol description] Dual-frequency antenna 1 Grounding portion 10 Side edge 11 First positioning portion 12 Second positioning portion 13 Positioning hole 14 Grounding point 16 Connecting portion 17 Inner edge 18 Feeding point 19 Coupling portion 20 Antenna portion 30 First Antenna section compartment 31 33 second antenna section 32