201004036 九、發明說明： .【發明所屬之技術領域】 • 本發明涉及一種天線。 【先前技術】 近年來隨著無線通訊技術之進步，以及與國際網路之 密切結合，無線通訊應用已呈現爆炸性之成長。在目前之 曰常生活中，已隨處可見無線通訊相關產品，例如，手機 (mobile phone)、全J泉定位系統（global positioning system， GPS)、無線保真（Wireless Fidelity )、無線區域網路（wireless local-area network，WLAN)、藍牙（bluetooth)產品，具有無 線通訊功能之筆記本電腦等。201004036 IX. Description of the invention: [Technical field to which the invention pertains] • The present invention relates to an antenna. [Prior Art] In recent years, with the advancement of wireless communication technology and the close integration with international networks, wireless communication applications have experienced explosive growth. In the current daily life, wireless communication related products have been seen everywhere, such as mobile phone, global positioning system (GPS), wireless fidelity (Wireless Fidelity), wireless local area network ( Wireless local-area network (WLAN), Bluetooth (bluetooth) products, notebook computers with wireless communication capabilities, etc.
而所有之無線通訊系統都缺少不了天線，天線係無線 通訊系統之門戶且天線設計之好壞會直接影響產品之通訊 品質。而在世界範圍内不同之區域其設定之無線通訊之標 準不同，即無線通訊之頻率範圍不同，因此，為了使天線 盡可能多之適應各個不同區域之不同之無線通訊之標準， 需要盡可能之增大天線之頻帶。同時為了將天線與可檇式 電子裝置相匹配，需要盡可能之減小天線之尺寸以適應可 檇式電子裝置小型化與輕薄化之要求。而在微帶天線之設 計過程中，天線尺寸之減小通常導致天線頻帶之衰減，從 而無法滿足高傳輸速率之無線通訊之需要。因此，非常需 要發展出一種微帶天線，藉以進一步減小天線尺寸，並提 供足夠寬頻來克服先前技術之缺點。相關之天線請參閱 IEEE TRANSACTIONS ON ANTENNA AND 201004036 PROPAGATION, VOL. 53, NO. 1，JANUARY 2005 之 'Dual-Band Flat-Plate Antenna With a Shorted Parasitic Element for Laptop Applications” 。 【發明内容】 有蓉如此，有必要提供一種尺寸小且具有寬頻帶特性 之多頻天線。 一種多頻天線，其包括一金屬面，該金屬面具有一不 封閉之槽孔結構、一饋電點及一接地部。該槽孔結構包括 第、第一、第二、第四、第五、第六、第七矩形槽孔， 該第一矩形槽孔與第三矩形槽孔自該第一矩形槽孔之同一 側延伸且相互平行設置，該第四、第五、第六、第七矩形 槽孔從該第三矩形槽孔遠離第—矩形槽孔之—側延伸而出 且Γ尾依★垂直相接且向内彎折，該第四矩形槽孔垂直於 第矩升/槽孔且自遠離第二矩形槽孔方向延伸。該饋電 :::第矩形槽孔與金屬面之-條交界線上，該交界線 -矩形槽孔自第—矩形槽孔之 矩形槽孔，該接地部位 疋弟一 饋電點不重合之任意:槽孔結構與金屬面之交界線上與 屬面2於：：技術’本發明提供之多頻天線，在同-金 屬面设置一由第—、坌_ 七矩形栌孔纟且点少她 第三、第四、第五、第六、第 工作於i —工#Μ 9孔結構，其中，第一、第二矩形槽孔 第七矩形槽孔卫作於Μ 第二、第四、4五、第六、 有槽孔天線寬頻特性之二作=因此該多頻天線在具 1J知，还此夠在同一平面内實現由 201004036 一根槽孔天線兼顧兩個不同之工作頻率範圍，有效減少了 •天線設計面積，降低成本，同時具有槽孔天線之寬頻特性。 ^【實施方式】 下面將結合附圖對本發明實施方式作進一步之詳細描 述。 請參閱圖1及圖2,為本發明實施方式提供之一種多頻 帶天線100該夕頻天線包括一個金屬面1〇，該金屬 f面10具有一不封閉之槽孔結構2〇、一饋電點30及一接地 部40。 該金屬面10可為-金屬片之表面，也可為—印刷電路 板之金屬表面。 該槽孔結構20可通過衝壓之方式形成在該金屬面1〇 上’此時，該金屬φ 1〇 & 一金屬片之表面，也可通過姓刻 之方式形成在該金屬面10上，此時，該金屬面1〇為一印 刷電路板之金屬表面。該槽孔結構2〇包括一個第一矩形槽 孔210，一個第二矩形槽孔22〇 ’一個第三矩形槽孔Μ。， 一個第四矩形槽孔24〇，一個第五矩形槽孔25〇，一個第六 矩形槽孔260及一個第七矩形槽孔。可以理解，該槽孔 結構20中之槽孔均為矩形，每個矩形槽孔都具有兩個相對 車乂紐之側邊，稱之為短邊，及兩個相對較長之側邊，稱之 為長邊。 少該第二矩形槽孔220與第三矩形槽孔230自該第一矩 形槽孔210之同一條短邊延伸而出且相互平行設置，且該 第二矩形槽孔220與第三矩形槽孔230之長邊與第一矩形 201004036 •槽孔210之兩條長邊分別處於同一直線上。該第四矩形槽 •孔240、第五矩形槽孔250、第六矩形槽孔260及第七矩形 •槽孔270從該第三矩形槽孔230遠離第一矩形槽孔210之 -一側還延伸而出且首尾依次垂直相接且向内彎折。且該第 四矩形槽孔240垂直於該第三矩形槽孔230且自遠離第二 矩形槽孔220方向延伸。可以理解，該第五矩形槽孔250 及第七矩形槽孔270與該第三矩形槽孔230平行設置，該 第四矩形槽孔240與該第六矩形槽孔260平行設置。 在本實施方式中，該第一矩形槽孔210之寬度約為 5mm，長度約為20mm ;該第二矩形槽孔220之寬度約為 2mm，長度約為30mm ;第三矩形槽孔230之寬度約為 2mm，長度約為30mm ;該第四矩形槽孔240之寬度約為 1mm，長度分別約為8mm ;第五矩形槽孔250之寬度約為 1mm，長度分別約為20mm ;第六矩形槽孔260之寬度約為 1mm，長度分別約為3mm ;第七矩形槽孔270之寬度約為 1mm，長度分別約為8mm。可以理解，該第二矩形槽孔220 與第三矩形槽孔230之間之間距約為1mm。 該饋電點30位於第一矩形槽孔210與金屬面10之一 條交界線上。該交界線垂直第三矩形槽孔230自第一矩形 槽孔210延伸之一側且遠離第三矩形槽孔230。在本實施方 式中，該饋電點30與第一矩形槽孔210遠離該第二矩形槽 孔220之一側相距8.5mm。 該接地部40位於槽孔結構20與金屬面10之交界線 上，其可為槽孔結構20與金屬面10之交界線上與饋電點 11 201004036 • 30不重合之任意一點。 • 在本實施方式中，該第一矩形槽孔210及第二矩形槽 ‘孔220工作在第一工作頻段，用來接收或輻射無線保真 (Wireless Fidelity，WIFI)頻帶訊號。該第一矩形槽孔210、 第三矩形槽孔230、第四矩形槽孔240、第五矩形槽孔250、 第六矩形槽孔260及第七矩形槽孔270工作於第二工作頻 段，用來接收或輻射全球定位系統（Global Positioning System，GPS)頻帶訊號。請參閱圖3，為多頻天線100之回 波損耗侧視圖，從圖中可看出，第一工作頻段於2.5 GHZ 左右，為無線保真（Wireless Fidelity，WIFI)頻帶訊號，其 回波損耗約為-14dB。第二工作頻段在1.575GHZ左右，為 全球定位系統（Global Positioning System，GPS)頻帶訊號， 其回波損耗約為-24dB。 相對於先前技術，本發明提供之多頻天線，在同一金 屬面設置一由第一、第二、第三、第四、第五、第六、第 七矩形槽孔組成之槽孔結構，其中，第一、第二矩形槽孔 工作於第一工作頻段，第一、第三、第四、第五、第六、 第七矩形槽孔工作於第二工作頻段。因此該多頻天線在具 有槽孔天線寬頻特性之同時，還能夠在同一平面内實現由 一根槽孔天線兼顧兩個不同之工作頻率範圍，有效減少了 天線設計面積，降低成本，同時具有槽孔天線之寬頻特性。 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 12 201004036 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 .應涵蓋於以下申請專利範圍内。 ‘【圖式簡單說明】 圖1為本發明實施方式提供之多頻天線之結構示意圖。 圖2為圖1之多頻天線之尺寸標示圖。 圖3為圖1之回波損耗測試圖。 主要元件符號說明】 多頻天線 100 金屬面 10 槽孔結構 20 饋電點 30 接地部 40 第一矩形槽孔 210 第二矩形槽孔 220 第三矩形槽孔 230 第四矩形槽孔 240 第五矩形槽孔 250 第六矩形槽孔 260 第七矩形槽孔 270 13All wireless communication systems lack antennas. The antenna is the gateway to the wireless communication system and the antenna design will directly affect the communication quality of the product. In different regions of the world, the standard of wireless communication is different, that is, the frequency range of wireless communication is different. Therefore, in order to adapt the antenna as much as possible to different wireless communication standards in different regions, it is necessary to Increase the frequency band of the antenna. At the same time, in order to match the antenna with the portable electronic device, it is necessary to reduce the size of the antenna as much as possible to meet the requirements of miniaturization and thinning of the electronic device. In the design of the microstrip antenna, the reduction in the size of the antenna usually results in attenuation of the antenna band, thereby failing to meet the high transmission rate of wireless communication. Therefore, it is highly desirable to develop a microstrip antenna to further reduce the antenna size and provide sufficient wideband to overcome the shortcomings of the prior art. For related antennas, please refer to IEEE TRANSACTIONS ON ANTENNA AND 201004036 PROPAGATION, VOL. 53, NO. 1, "Dual-Band Flat-Plate Antenna With a Shorted Parasitic Element for Laptop Applications" by JANUARY 2005. [Summary] It is necessary to provide a multi-frequency antenna that is small in size and has wide-band characteristics. A multi-frequency antenna includes a metal surface having an unclosed slot structure, a feed point, and a ground portion. The hole structure includes first, second, fourth, fifth, sixth, and seventh rectangular slots, and the first rectangular slot and the third rectangular slot extend from the same side of the first rectangular slot and Parallel to each other, the fourth, fifth, sixth, and seventh rectangular slots extend from the third rectangular slot away from the side of the first rectangular slot and the tails are vertically connected and inwardly bent Folding, the fourth rectangular slot is perpendicular to the first rectangular rise/slot and extends away from the second rectangular slot. The feed::: the intersection of the rectangular slot and the metal surface, the boundary line - Rectangular slot from the first moment a rectangular slot of a slotted hole, the grounding portion of which is not coincident with a feeding point: a boundary between the slotted structure and the metal surface and the zonal surface 2:: Technology's multi-frequency antenna provided by the present invention - The metal surface is provided with a 栌 坌 坌 栌 栌 栌 栌 纟 纟 纟 她 她 她 她 她 她 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 第三 第三 第三 第三 第三 第三 第三 第三 第三 第三The second rectangular slot of the second rectangular slot is used in the second, fourth, fourth, sixth, and slotted antennas. The width of the antenna is the second one. Therefore, the multi-frequency antenna has the same knowledge, so it is enough in the same In-plane implementation of the 201004036 one slot antenna takes into account two different operating frequency ranges, effectively reducing the antenna design area, reducing the cost, and having the wide-band characteristics of the slot antenna. ^ [Embodiment] The embodiment of the present invention is further described in detail. Referring to FIG. 1 and FIG. 2, a multi-band antenna 100 according to an embodiment of the present invention includes a metal surface 1〇, and the metal f-plane 10 has an unclosed Slot structure 2〇, a feed point 30 And a grounding portion 40. The metal surface 10 can be a surface of a metal sheet or a metal surface of a printed circuit board. The slot structure 20 can be formed on the metal surface by stamping. The metal φ 1 〇 & a metal sheet surface may also be formed on the metal surface 10 by means of a surname, in which case the metal surface 1 is a metal surface of a printed circuit board. 2〇 includes a first rectangular slot 210, and a second rectangular slot 22〇' a third rectangular slot Μ. A fourth rectangular slot 24〇, a fifth rectangular slot 25〇, a sixth rectangular slot 260 and a seventh rectangular slot. It can be understood that the slots in the slot structure 20 are all rectangular, and each of the rectangular slots has two sides opposite to the rim, which are called short sides, and two relatively long sides, called It is the long side. The second rectangular slot 220 and the third rectangular slot 230 extend from the same short side of the first rectangular slot 210 and are disposed parallel to each other, and the second rectangular slot 220 and the third rectangular slot The long side of 230 and the first rectangle 201004036 • The two long sides of the slot 210 are on the same straight line. The fourth rectangular slot hole 240, the fifth rectangular slot 250, the sixth rectangular slot 260, and the seventh rectangular slot 270 are further away from the first rectangular slot 210 from the side of the first rectangular slot 210. Extending out and vertically connecting first and last and bending inward. The fourth rectangular slot 240 is perpendicular to the third rectangular slot 230 and extends away from the second rectangular slot 220. It can be understood that the fifth rectangular slot 250 and the seventh rectangular slot 270 are disposed in parallel with the third rectangular slot 230. The fourth rectangular slot 240 is disposed in parallel with the sixth rectangular slot 260. In this embodiment, the first rectangular slot 210 has a width of about 5 mm and a length of about 20 mm; the second rectangular slot 220 has a width of about 2 mm and a length of about 30 mm; and the width of the third rectangular slot 230 Approximately 2 mm and a length of about 30 mm; the fourth rectangular slot 240 has a width of about 1 mm and a length of about 8 mm; the fifth rectangular slot 250 has a width of about 1 mm and a length of about 20 mm; the sixth rectangular slot The holes 260 have a width of about 1 mm and a length of about 3 mm, respectively; the seventh rectangular slots 270 have a width of about 1 mm and a length of about 8 mm. It can be understood that the distance between the second rectangular slot 220 and the third rectangular slot 230 is about 1 mm. The feed point 30 is located on a boundary line between the first rectangular slot 210 and the metal surface 10. The boundary line is perpendicular to the third rectangular slot 230 from one side of the first rectangular slot 210 and away from the third rectangular slot 230. In the present embodiment, the feed point 30 is 8.5 mm away from the side of the first rectangular slot 210 away from the second rectangular slot 220. The grounding portion 40 is located on the boundary line between the slot structure 20 and the metal surface 10, and may be any point that does not coincide with the feeding point 11 201004036 • 30 on the boundary line between the slot structure 20 and the metal surface 10. In the present embodiment, the first rectangular slot 210 and the second rectangular slot ‘the aperture 220 operate in the first working frequency band for receiving or radiating a Wireless Fidelity (WIFI) band signal. The first rectangular slot 210, the third rectangular slot 230, the fourth rectangular slot 240, the fifth rectangular slot 250, the sixth rectangular slot 260, and the seventh rectangular slot 270 are operated in the second working frequency band. To receive or radiate the Global Positioning System (GPS) band signal. Please refer to FIG. 3 , which is a side view of the return loss of the multi-frequency antenna 100. As can be seen from the figure, the first working frequency band is about 2.5 GHz, which is a Wireless Fidelity (WIFI) band signal, and its return loss. It is about -14dB. The second operating frequency band is around 1.575 GHz, which is the Global Positioning System (GPS) band signal, and its return loss is about -24 dB. Compared with the prior art, the multi-frequency antenna provided by the present invention has a slot structure composed of first, second, third, fourth, fifth, sixth, and seventh rectangular slots on the same metal surface, wherein The first and second rectangular slots operate in the first working frequency band, and the first, third, fourth, fifth, sixth, and seventh rectangular slots operate in the second working frequency band. Therefore, the multi-frequency antenna has the wide-frequency characteristics of the slot antenna, and can realize two different operating frequency ranges by one slot antenna in the same plane, effectively reducing the antenna design area, reducing the cost, and having the slot. Broadband characteristics of the hole antenna. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by those skilled in the art will be covered by the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a multi-frequency antenna according to an embodiment of the present invention. 2 is a dimension diagram of the multi-frequency antenna of FIG. 1. Figure 3 is a return loss test diagram of Figure 1. Main component symbol description] Multi-frequency antenna 100 Metal surface 10 Slot structure 20 Feed point 30 Ground portion 40 First rectangular slot 210 Second rectangular slot 220 Third rectangular slot 230 Fourth rectangular slot 240 Fifth rectangle Slot 250 sixth rectangular slot 260 seventh rectangular slot 270 13