1269485 八.、發明說明： 【發明所屬之技術領域】 本發明係有關於一種可寬頻操作之微帶線饋入印刷 多邊形槽孔天線，尤其是指一種應用在無線行動通訊產品 上的天線。 【先前技術】 近年來，隨著無線通訊技術的快速發展與更新，各式 各樣的無線通訊產品，也如雨後春筍般的出現；由於現今 採線通。fl產品不但$冓求多功能、多變化、更要求外觀時髮 與體積輕巧，因此無線通訊產品已在人類生活中佔有相當 重要的角色。在未來，無線通訊系統必須能夠具備提供多 媒體資料與行動資料通訊的能力！所以，天線的尺寸與阻 抗頻寬的大小便成為影響產品好壞的重要關鍵之一。 寬頻操作（broadband operation)的槽孔天線在印 刷天線研究及應用上是相當重要的課題。其中相關的微帶 天線設計亦不少，但是受限於微帶天線本身窄頻寬的特 性，不利於實際應用。而印刷寬槽孔天線（pHntedwide slot antenna)具有低姿勢（l〇w profile )、重量輕（Hght weight)、容易製造與頻寬大等優點，所以利用印刷槽孔 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。 然而’傳統的印刷寬槽孔天線，它的阻抗頻寬 (impedance bandwidth)大約只有10〜20%。因此，對於 —些寬頻操作的印刷寬槽孔天線已經被提出。如：（1) 5〇 歐姆微帶線饋入一等腰三角形槽孔天線（triangularslc)t 5 1269485 ..antenna)。（2) 50歐姆的微帶線饋入一半圓形槽孔天線 (semiciixularslot)。然而，上述這些寬頻操作的印刷 寬槽孔天線的設計，它們的中心操作頻率約在未植入小矩 形槽孔（rectangularslot)時之寬槽孔天線的主共振頻 率（resonant frequency)附近。此—結果表示：設計某 個印刷槽孔天線時，其阻抗頻寬會因此小矩形槽孔的植又 而有效的變大。 此外，若以標準的50歐姆微帶線饋入具設有矩形槽孔 • 之天線時，报難匹配出具有寬頻操作之頻段。如第二十一 騎示’為未具有梯形槽孔的矩形槽孔天線於不同二微帶 饋入線長度與矩形槽孔尺寸時所量測到的返回損失圖，其 . 中曲，（221)代表微帶饋入線長度約48.0公爱實驗量測的 返回損失曲線’而㈣（222)則代表矩形槽孔寬度約4〇 5 實驗量測的返回損失曲線。從第二十-圖中可得知當 微帶饋人線的長度調整至約48〇公釐與矩形槽孔的寬^ 调整至約4 0 · 5公釐時皆可產生低頻共振模態，但是卻很難 • 匹配出高頻模態，導致阻抗頻寬很小。 【發明内容】 因此，在本發明中我們提出一種微帶線饋入多邊形槽 =天線的創新設計，不僅可滿足無線區域網路系統 ·= 2· 484 GHz、5· 15-5· 35 GHz&5· 725-5· 825 GHz…等） =求’且使用_簡單之微帶線饋人結構與改變槽孔形狀 :阻抗頻寬加大，同時也保持天線本身具有低姿勢（1. 6 又）重畺輕的優點，因此特別適合内藏於無線通訊 屋品上，達到美化產品外觀的目的。 如上所述，本發明的目的在於提供一種可寬頻操作之 61269485 VIII. Invention Description: TECHNICAL FIELD The present invention relates to a microstrip line feed printed polygonal slot antenna capable of wideband operation, and more particularly to an antenna for use in a wireless mobile communication product. [Prior Art] In recent years, with the rapid development and update of wireless communication technology, various wireless communication products have sprung up; due to the current adoption of the line. The fl products are not only versatile, multi-variable, but also require a good appearance and light weight. Therefore, wireless communication products have played a very important role in human life. In the future, wireless communication systems must be able to provide the ability to communicate with multimedia data and mobile data! Therefore, the size of the antenna and the size of the impedance bandwidth become one of the important factors affecting the quality of the product. Slot antennas for broadband operation are an important issue in the research and application of printed antennas. The related microstrip antenna design is also quite limited, but it is limited by the narrow bandwidth of the microstrip antenna itself, which is not suitable for practical applications. The printed wide-slot antenna (pHntedwide slot antenna) has the advantages of low profile (h〇w profile), light weight (Hght weight), easy manufacturing and wide bandwidth, so the design of the broadband operation antenna using the printed slot structure is very Suitable for wireless mobile communication applications. However, the conventional printed wide-slot antenna has an impedance bandwidth of only about 10 to 20%. Therefore, printed wide-slot antennas for some broadband operations have been proposed. Such as: (1) 5 ohm ohmic microstrip line feeding into an isosceles triangular slot antenna (triangularslc) t 5 1269485 ..antenna). (2) A 50 ohm microstrip line feeds into a semi-circular slot antenna (semiciixularslot). However, these wide-bandwidth printed wide-slot antennas are designed with a center operating frequency approximately near the main resonant frequency of a wide-slot antenna when no rectangular slots are implanted. This—the result indicates that when designing a printed slot antenna, the impedance bandwidth will effectively increase the size of the small rectangular slot. In addition, if a standard 50 ohm microstrip line is used to feed an antenna with a rectangular slot, it is difficult to match the frequency band with wideband operation. For example, the twenty-first ride shows the return loss map measured by the rectangular slot antenna without trapezoidal slots in different two microstrip feed line lengths and rectangular slot sizes. Represents the return loss curve of the microstrip feed line length of approximately 48.0 angstroms experimental measurements and (4) (222) represents the return loss curve of the rectangular slot width of approximately 4〇5 experimental measurements. It can be seen from the twentieth-picture that the low frequency resonant mode can be generated when the length of the microstrip feed line is adjusted to about 48 mm and the width of the rectangular slot is adjusted to about 40 · 5 mm. However, it is difficult to match the high frequency mode, resulting in a small impedance bandwidth. SUMMARY OF THE INVENTION Therefore, in the present invention, we propose an innovative design of a microstrip line feeding polygon slot=antenna, which can satisfy not only the wireless local area network system, but also the 2, 484 GHz, 5·5, 5, 35 GHz & 5· 725-5· 825 GHz...etc) = Seek and use _simple microstrip line feed structure and change slot shape: the impedance bandwidth is increased, while keeping the antenna itself low (1.66 It has the advantage of being light and light, so it is especially suitable for being embedded in wireless communication products to achieve the purpose of beautifying the appearance of the product. As described above, it is an object of the present invention to provide a wideband operation 6