200847527 - 九、發明說明： 【發明所屬之技術領域】 * 本發明係一種支援WLAN/WiMAX技術協定之雙頻印刷 • 寬槽孔天線’可以廣為應用在各種不同通訊產品之上，並 符合現在新興無線通訊技術WiMAX ( Worldwide Interoperability for Microwave Access ;全球互通的 微波存取）及傳統固網WLAN之頻段操作。 f 【先前技術】 由於消費性電子、無線通訊裝置及行動運算技術的流 行，具有輕、薄、短、小和無線通訊的電子產品將成為主 流。印刷式槽孔天線是重要發展技術之一，相關的研究亦 '不少，大部份係採用微帶天線設計理念，但微帶天線往往 受限於窄頻寬之特性。部份之微帶天線雖有寬頻或雙頻效 果，但因為其結構複雜，且天線之增益又無法達到室外傳 送接收之標準，故不利於實際應用。印刷寬槽孔天線 I ( Printed wide slot antenna )具有低姿勢（low prof ile)、重量輕（light weight)、容易製造與頻寬大等 優點，利用其印刷槽孔結構來設計寬頻操作的天線是非常 適合無線行動通訊的應用。 【發明内容】 本發明係提供一種支援WLAN/WiMAX技術協定之雙頻印 刷寬槽孔天線，包含有微波基板、接地金屬面、矩形槽孔、 金屬微帶線及細長金屬；其中，微波基板，其具有相互平 200847527 行之苐一表面及第二表面，接地金屬面，係設置於微波基 板之第一表面；矩型槽孔，係蝕刻製作於接地金屬面上， 以暴露出微波基板；金屬微帶線，自矩形槽孔一側寬邊， 平行矩型槽孔長邊，平貼於微波基板第二表面，往矩型槽 孔垂直映射於第二表面之區域範圍内，筆直饋入一預定長 度；細長金屬，位於矩形槽孔中，設有一長邊平行矩型槽 孔之寬邊，其長邊一端係延伸至矩形槽孔邊緣，與接地金 屬面具有電性連結。 / 此一设汁用以產生本發明案相對高頻良好匹配頻段 操作的結構在於矩形槽孔，其係採寬槽孔天線設計，能較 一般槽孔天線發揮出更大之操作頻段。選擇一個適當的矩 形槽孔尺寸，將會激發一個寬頻頻段之共振模態，再經由 调整50歐姆的金屬微帶線饋入長度即可達到良好的阻抗 匹配，可形成一個適合寬頻操作的天線。 上述的細長金屬係一體連接於接地金屬面或該細長 i 金屬係個別成型再另連接於接地金屬面。 綜上所述，於矩形槽孔中加了一細長金屬，接地金屬 面、細長金屬及其與金屬微帶線饋入方向同侧之矩形槽孔 寬邊間距，合併出電磁耦合效應，產生出本發明相對低頻 良好匹配頻段操作，當間距越大，其阻抗匹配就往低頻移 動，且高頻截止頻率也往更低的頻段移動，當間距調整至 一適當距離時，則可匹配出一相對低頻共振頻率，與適當 矩形槽孔所匹配之相對鬲頻共振頻率兩相配合，達成一雙 200847527 頻天線’並可產生出適用WLAN/WiMAX技術之應用頻段。 本發明之優點在於：具有印刷寬槽孔天線低姿勢、重 •量輕、容易製造與頻寬大之優點，設計結構也相當簡單， • 利用槽孔中加入一細長金屬即可輕易達成一雙頻天線，並 滿足WLAN/WiMAX技術所需高增益（此雙頻天線有最大增益 值，分別為4.7及6.l6dBi)。 【實施方式】 請參閱第一圖，本發明係提供一種支援WLAN/WiMAX技 術協定之雙頻印刷寬槽孔天線設計，包含有微波基板 (11)、接地金屬面（12)、矩形槽孔（13)、金屬微帶線（14) 及細長金屬（15);其中，微波基板（11)，其具有相互平 行之第一表面（111)及第二表面（112);接地金屬面（12)， 係設置於微波基板（11)之第一表面（111);矩型槽孔（13)， 係蝕刻製作於接地金屬面（12)上，以暴露出微波基板 (11);金屬微帶線（14)，自矩形槽孔（13) —侧寬邊（13b)， i 平行矩型槽孔（13)長邊（13a)，平貼於微波基板（11) 第二表面（112)，往矩型槽孔（13)垂直映射於第二表面 (112)之區域範圍内，筆直饋入一預定長度；細長金屬 (15)，位於矩形槽孔（13)中，設有一長邊（15a)平行 矩型槽孔（13)之寬邊（13b)，其長邊（15a) —端係延伸 至矩形槽孔（13)邊緣，與接地金屬面（12)具有電性連 結0 如上述，本發明主要係利用細長金屬（15)，及其與 200847527 金屬微帶線（14)饋入方向之接地金屬面（12)間之間距 (16)，匹配以致產生耦合效應，當間距（16)愈大，阻 抗匹配就愈往低頻移動，間距（16)大小為imin時，匹配 出本發明案之較佳實施例工作頻段。 在本實施例中，微波基板（11 )之介電常數（ε γ)=4· 4、損耗正切（loss tangent )=0· 0245、長度（11a) 為 700mm、寬度（lib)為 60mm、厚度（lie)為 ι· 6mm 之 雙面感光電路板（FR4板）；而矩型槽孔（13)之長邊（13a) 為45mm，寬邊（13b)為32mm ;另金屬微帶線（14)寬度 (14b)為3mm、長度（14a)為26mm，具有50歐姆之阻 抗；另細長金屬（15)之寬邊（15b)為3.8mm,長邊（15a) 為44mm，細長金屬（15)之長邊（15a)與金屬微帶線（14) 饋入方向同侧之矩形槽孔（13)寬邊（13b)之間的間距 (16)為1腿。惟上述參數僅為本發明較佳實施例之一， 其他等效變換匹配之參數，亦屬本發明之範圍。 ^如第二圖所示，係為此發明一較佳實施例之返回損失 量測，此雙頻段（2· 425〜2· 775，4.475〜5. 825GHz)符 合WLAN/WiMAX技術之操作頻段；如第三圖及第四圖所示， 為本發明一較佳實施例操作頻率在2.45GHz及5.75GHz 時’ xz平面上的轄射場形實驗量測與模擬分析結果；如第 五圖及第六圖所示’為本發明—較佳實施例操作頻率在 ^45GHz及5· 75GHz時，yz平面上的輕射場形實驗量測與 知擬分析結果；如第七圖及第八圖所示，為本發明一較佳 8 200847527 實施例操作於低頻及高頻之天線增益測量結果 ，由圖中可 知’本發明實施例之天線有最大增益值分別為4.7dBi及 6· 16dBi，增益變化量小於丨.9idBi。 • 【圖式簡單說明】 第-圖係為本發明-較佳實施例之幾何結構圖。 第^圖係為本發明-較佳實施例之返回損失量測。 第二圖係為本發明一較佳實施例工作於2· π·在 ί XZ—Plane上的11射場型圖；*中，f線代表實驗量測結果， 虛線代表模擬分析結果。 第四圖係為本發明—較佳實施例工作於5· 75GHz在 xz-plane上的輪射場型圖；其中，實線代表實驗量測結果， -虛線代表模擬分析結果。 第五圖係為本發明—較佳實施例工作於2· 45GHz在 yz-plane上的輻射場型圖；其中，實線代表實驗量測結果， 虛線代表模擬分析結果。 第六圖係為本發明—較佳實施例工作於& 75卯2在 yz-plane上的輻射場型圖；其中，實線代表實驗量測結果， 虛線代表模擬分析結果。 第七圖係為本發明一較佳實施例工作於相對低頻頻段 之天線增益測量結果。 第八圖係為本發明一較佳實施例工作於相對高頻頻段 之天線增益測量結果。 【主要元件符號說明】 200847527 (11) 微波基板 dll) 第一表面 (112) 第二表面 (11a) 長度 (lib) 寬度 (11c) 厚度 (12) 接地金屬面 (13) 矩形槽孔 (13a) 長邊 (13b) 寬邊 (14) 金屬微帶線 (14a) 長度 (14b) 寬度 (15) 細長金屬 (15a) 長邊 (15b) 寬邊 (16) 間距200847527 - Nine, invention description: [Technical field of invention] * The present invention is a dual-frequency printing supporting WLAN/WiMAX technology protocol. The wide-slot antenna can be widely applied to various communication products and conforms to the present. Emerging wireless communication technology WiMAX (Worldwide Interoperability for Microwave Access) and traditional fixed-line WLAN band operation. f [Prior Art] Due to the popularity of consumer electronics, wireless communication devices, and mobile computing technologies, electronic products with light, thin, short, small, and wireless communications will become the mainstream. Printed slot antennas are one of the important development technologies, and related research is also 'many, most of which adopt microstrip antenna design concepts, but microstrip antennas are often limited by narrow bandwidth characteristics. Although some microstrip antennas have broadband or dual-frequency effects, they are not suitable for practical applications because of their complicated structure and the gain of the antenna cannot meet the standard of outdoor transmission and reception. Printed wide slot antenna I has the advantages of low pro ile, light weight, easy manufacturing and wide bandwidth. The design of wide-frequency operation antenna is very important with its printed slot structure. Suitable for wireless mobile communication applications. SUMMARY OF THE INVENTION The present invention provides a dual-frequency printed wide slot antenna supporting a WLAN/WiMAX technology protocol, including a microwave substrate, a grounded metal surface, a rectangular slot, a metal microstrip line, and an elongated metal; wherein, the microwave substrate, The surface has a flat surface and a second surface, and the grounded metal surface is disposed on the first surface of the microwave substrate; the rectangular slot is etched on the grounded metal surface to expose the microwave substrate; the metal The microstrip line is from the wide side of the rectangular slot, and the long side of the parallel rectangular slot is flatly attached to the second surface of the microwave substrate, and the rectangular slot is vertically mapped to the area of the second surface, and is fed straight into the slot. The predetermined length; the elongated metal is located in the rectangular slot, and has a wide side of a long-edge parallel rectangular slot, and one end of the long side extends to the edge of the rectangular slot and is electrically connected to the grounded metal surface. / The juice is used to produce the relatively high frequency well-matched frequency band of the present invention. The structure is a rectangular slot, which is designed with a wide slot antenna, and can play a larger operating frequency band than a general slot antenna. Choosing an appropriate rectangular slot size will excite a resonant mode in the wide frequency band and then achieve a good impedance matching by adjusting the 50 ohm metal microstrip feed length to form an antenna suitable for wideband operation. The elongated metal is integrally connected to the grounded metal surface or the elongated i metal is separately formed and connected to the grounded metal surface. In summary, an elongated metal is added to the rectangular slot, the grounded metal surface, the elongated metal and the width of the rectangular slot on the same side as the feeding direction of the metal microstrip line are combined to form an electromagnetic coupling effect. The invention operates in a relatively low frequency well-matched frequency band. When the spacing is larger, the impedance matching moves to a lower frequency, and the high-frequency cutoff frequency also moves to a lower frequency band. When the spacing is adjusted to an appropriate distance, a relative match can be matched. The low-frequency resonant frequency, in conjunction with the appropriate 鬲-frequency resonance frequency matched by the appropriate rectangular slot, achieves a pair of 200847527-frequency antennas and can produce application bands for WLAN/WiMAX technology. The invention has the advantages that the printed wide slot antenna has the advantages of low posture, light weight, light weight, easy manufacture and wide bandwidth, and the design structure is also quite simple. • A double frequency can be easily achieved by adding a slender metal in the slot. Antennas and meet the high gain required for WLAN/WiMAX technology (this dual-frequency antenna has maximum gain values of 4.7 and 6.l6dBi, respectively). [Embodiment] Referring to the first figure, the present invention provides a dual-frequency printed wide-slot antenna design supporting a WLAN/WiMAX technology protocol, including a microwave substrate (11), a grounded metal surface (12), and a rectangular slot ( 13) a metal microstrip line (14) and an elongated metal (15); wherein the microwave substrate (11) has a first surface (111) and a second surface (112) that are parallel to each other; and a grounded metal surface (12) , disposed on the first surface (111) of the microwave substrate (11); the rectangular slot (13) is etched on the grounded metal surface (12) to expose the microwave substrate (11); the metal microstrip line (14), from the rectangular slot (13) - side wide side (13b), i parallel rectangular slot (13) long side (13a), flat on the second surface (112) of the microwave substrate (11), The rectangular slot (13) is vertically mapped to the area of the second surface (112) and fed straight into a predetermined length; the elongated metal (15) is located in the rectangular slot (13) and has a long side (15a) The wide side (13b) of the parallel rectangular slot (13) has a long side (15a) extending to the edge of the rectangular slot (13) and having electrical connection with the grounded metal surface (12). Sexual Linkage 0 As described above, the present invention mainly utilizes the distance (16) between the elongated metal (15) and the grounded metal surface (12) of the feeding direction of the 200847527 metal microstrip line (14), so as to cause a coupling effect. When the spacing (16) is larger, the impedance matching moves to the lower frequency, and when the spacing (16) is imin, the working frequency band of the preferred embodiment of the present invention is matched. In the present embodiment, the microwave substrate (11) has a dielectric constant (ε γ) = 4·4, a loss tangent = 0. 0245, a length (11a) of 700 mm, a width (lib) of 60 mm, and a thickness. (lie) is a ι·6mm double-sided photosensitive circuit board (FR4 board); and the rectangular slot (13) has a long side (13a) of 45 mm and a wide side (13b) of 32 mm; another metal microstrip line (14) The width (14b) is 3mm, the length (14a) is 26mm, and has an impedance of 50 ohms; the other side of the elongated metal (15) is 3.8mm, the long side (15a) is 44mm, and the elongated metal (15) The distance (16) between the long side (15a) and the wide side (13b) of the rectangular slot (13) on the same side as the feeding direction of the metal microstrip line (14) is one leg. However, the above parameters are only one of the preferred embodiments of the present invention, and other equivalent conversion matching parameters are also within the scope of the present invention. As shown in the second figure, the return loss measurement is a preferred embodiment of the invention. The dual frequency band (2·425~2·775, 4.475~5. 825 GHz) conforms to the operating frequency band of the WLAN/WiMAX technology; As shown in the third and fourth figures, the results of the experimental measurement and simulation analysis of the field shape on the 'xz plane when the operating frequency is 2.45 GHz and 5.75 GHz according to a preferred embodiment of the present invention; Figure 6 shows the results of the light-field shape measurement and the pseudo-analysis on the yz plane when the operating frequency is at 45 GHz and 5.75 GHz, as shown in the seventh and eighth figures. The antenna gain measurement results of the low-frequency and high-frequency operation of the embodiment of the present invention are as follows. The antenna of the embodiment of the present invention has a maximum gain value of 4.7 dBi and 6·16 dBi, respectively. Less than 丨.9idBi. • BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a geometrical view of the preferred embodiment of the invention. The figure is a return loss measurement of the present invention - the preferred embodiment. The second figure is an 11-field pattern of 2·π· on ί XZ-Plane according to a preferred embodiment of the present invention; in the *, the f line represents the experimental measurement result, and the dotted line represents the simulation analysis result. The fourth figure is a view of the wheel field pattern of the invention on the xz-plane at 5·75 GHz; wherein the solid line represents the experimental measurement result, and the broken line represents the simulation analysis result. The fifth figure is a radiation pattern diagram of the invention working on the yz-plane at 2.45 GHz; wherein the solid line represents the experimental measurement result and the broken line represents the simulation analysis result. The sixth figure is a radiation pattern diagram of the preferred embodiment working on & 75卯2 on the yz-plane; wherein the solid line represents the experimental measurement result and the broken line represents the simulation analysis result. The seventh figure is an antenna gain measurement result operating in a relatively low frequency band according to a preferred embodiment of the present invention. The eighth figure is an antenna gain measurement result for a relatively high frequency band in accordance with a preferred embodiment of the present invention. [Main component symbol description] 200847527 (11) Microwave substrate dll) First surface (112) Second surface (11a) Length (lib) Width (11c) Thickness (12) Grounded metal surface (13) Rectangular slot (13a) Long side (13b) Wide side (14) Metal microstrip line (14a) Length (14b) Width (15) Slim metal (15a) Long side (15b) Wide side (16) Spacing