201214873 六、發明說明： 【發明所屬之技術領域】 ㈣，其外圍較長 整：：此路彳心 符合：==型==賴態，以 好的等方向性n射場_平穩的峰值增鱗性▲辭減均具有良201214873 VI. Description of the invention: [Technical field to which the invention belongs] (4), its periphery is long and complete:: This road is in line with: == type == Lai state, with good isotropic directional n-field _ stable peak scale-up Sex ▲ derogation is good
【先前技術】 在任何無線通訊系統中，天線佔有非常 應屬於平面天線(。1:^ t：l 〇WPr〇flIe)'^^ (-lls1Ze)，ft|l (llghtweight；. 低成本（bw cost )、製作容易及可信度高的特性，同時 ) 物體之表面上，使得平面天缝A量翻，而_在w祖χ系 天線雖已有多項設計方法被提出但大多僅限於 胁' 二 ί晉=小型化多頻或寬頻平面天線之研發成果則付之闕；，、在3 _勢下，個人軌產品的要求越來越嚴苛，輕薄短小、 化廉物美已經為設計上的基本要求，要在有限空間設計出適人的天 線’天線本身的形式與尺寸大小便成為第—要件，另外，天線二操作 頻寬（Bandwidth )、增益（Gain )、效率（職―）與輕射場型 (RadiationPattern)等，都是可深入研究的方向。 【發明内容】 我們提出-種WiMAX系統用平面雙u型多頻單極天線，本天線 可激發2.6 / 3.5 / 5.5 GHz三個WiMAX系統用操作棋離，盆矣 220 / 1660 / 1480 MHz ’天線峰值增益與輻射效率分別為w /=/ 5 5 dBi and 68 / 66 / 95 %，且在XY-plane具有近似等方向性的辕射場型。 201214873 【實施方式】 第1圖是本發明天線之一實施例，包括：一介質基板10，該介質 基板設有兩金屬表面，該金屬表面包含：一背面接地金屬面11，一訊 號饋入微帶金屬片12，一訊號饋入位置13，一第一 ϋ型輻射金屬片 I4,該u型金屬表面包含：一第一 υ型輻射金屬片之起始端ΐ4ΐ，一 第一 U型輕射金屬片之中間臂⑷，一第一 υ型輻射金屬片之末端 143，及一第二U型輻射金屬片15，該U型金屬表面包含：—第二υ 型輻射金屬片之起始端151 ’ 一第二U型輻射金屬片之中間臂.152，一 第二U型輻射金屬片之末端153。[Prior Art] In any wireless communication system, the antenna occupies a plane antenna (.1:^t:l 〇WPr〇flIe)'^^ (-lls1Ze), ft|l (llghtweight;. low cost (bw) Cost ), easy to make and highly reliable, and) on the surface of the object, the plane of the sky is turned over, and _ in the w ancestral antenna has been proposed a number of design methods but mostly limited to the threat ' The development of small-scale multi-frequency or wide-band planar antennas is inevitable; in the 3 _ trend, the requirements of personal rail products are becoming more and more demanding, light and short, and cheap and good for design. Basic requirements, to design a suitable antenna in a limited space 'the form and size of the antenna itself becomes the first element, in addition, the antenna two operating bandwidth (Bandwidth), gain (Gain), efficiency (professional -) and light RadiationPattern, etc., are all in-depth research directions. SUMMARY OF THE INVENTION We propose a planar dual u-type multi-frequency monopole antenna for WiMAX systems. This antenna can excite three WiMAX systems with 2.6 / 3.5 / 5.5 GHz operation, and the basin is 220 / 1660 / 1480 MHz 'antenna The peak gain and radiation efficiency are w /=/ 5 5 dBi and 68 / 66 / 95 %, respectively, and the XY-plane has an approximately isotropic directional field pattern. 201214873 [Embodiment] FIG. 1 is an embodiment of an antenna according to the present invention, comprising: a dielectric substrate 10, the dielectric substrate is provided with two metal surfaces, the metal surface comprises: a back grounded metal surface 11, a signal feeding microstrip a metal sheet 12, a signal feeding position 13, a first ϋ-type radiating metal sheet I4, the u-shaped metal surface comprising: a starting end of a first υ-shaped radiant metal sheet ΐ4ΐ, a first U-shaped light-emitting metal sheet The intermediate arm (4), a first radiant metal sheet end 143, and a second U-shaped radiating metal sheet 15, the U-shaped metal surface comprising: - a second υ type radiant metal sheet starting end 151 ' The middle arm .152 of the two U-shaped radiating metal piece, the end 153 of the second U-shaped radiating metal piece.
第2圖是本發明天線之一實施例之返回損失實驗量測結果圖，縱 軸表示返回損失(dB)，橫軸表示操作頻率（GHz);如第2圖所示，由 所得的測試結果，在返回損失值大於等於1〇 dB為標準， 則Figure 2 is a graph showing the return loss experimental measurement results of an embodiment of the antenna of the present invention, wherein the vertical axis represents the return loss (dB) and the horizontal axis represents the operating frequency (GHz); as shown in Fig. 2, the obtained test result , when the return loss value is greater than or equal to 1〇dB as the standard, then
220 / 1660 / M80 MHz，WlMAX 2, / 3, / 5, GhJ 要求y表示本發明天線之實施例在各頻段上具有良好的操作特性。 第3圖、第4圖與第5圖為本發明天線之一實施例分別於26GHz、 3.5 GHz及5.5 GHz之幸畐射場型量測結果。射，在χ_γ平面均為良好 的等方向性输場型，而在Χ_ζ平面及γ_ζ平面制垂向性舖場型 (BroadsKleRadiation)，為一典型之單極天線輻射場型。 第6一圖、第7圖與第8圖為本發明天線之一實施例分別於低頻、 中頻與南頻段之天線峰值增益實驗量縣果，縱軸表示增益值 ( dBi)，橫軸表示操作頻率（GHz)，由實驗結果得知，·本天 =益=5/4.1 /5.5 dBi ’具有良好之操作特性’亦即，表示本發明天 線之霄施例可以產生良好的收發效果。 综合上述說明，本發明之一種斯财乂系統用平面雙㈣多頻單 =天線具有三賴作及近似料雜輻射場型之特性；此外，不僅譽 ^本她線彻軸值極高4 201214873 【圖式簡單說明】 第1圖為本發明之平面雙υ型多頻單極天線之一實施例結構圖。 第2圖為本發明天線一實施例之實測返回損失量測結果。 第3圖為本發明天線一實施例操作於2.6 GHz、3.5 GHz及5.5 GHz在 X-Y平面之輻射場型量測結果。 第4圖為本發明天線一實施例操作於2.6 GHz、3.5 GHz及5,5 GHz在 X-Z平面之輻射場型量測結果。 第5圖為本發明天線一實施例操作於2.6 GHz、3,5 GHz及5.5 GHz在 Y-Z平面之輻射場型量測結果。。 第6圖為本發明天線一實施例在低頻段之天線峰值增益量測結果。 第7圖為本發明天線一實施例在中頻段之天線峰值増益量挪結果。 第8圖為本發明天線一實施例在高頻段之天線峰值增益量測結果。 【主要元件符號說明】 10介質基板 Η背面接地金屬面 12訊號饋入微帶金屬線 13訊號饋入位置 14第一 U型輻射金屬片 15第二U型輻射金屬片 141第一 U型輻射金屬片之起始端 142第一 U型輻射金屬片之中間臂 ]43第一 U型輻射金屬片之末端 151第二U型輻射金屬片之起始端 15 2第二U型輻射金屬片之中間臂 153第二U型輻射金屬片之末端220 / 1660 / M80 MHz, WlMAX 2, / 3, / 5, GhJ Requires y to indicate that the embodiment of the antenna of the present invention has good operational characteristics in each frequency band. 3, 4, and 5 are measurement results of the forging field type at 26 GHz, 3.5 GHz, and 5.5 GHz, respectively, of one embodiment of the antenna of the present invention. The shot is a good isotropic directional field type in the χ γ plane, and a typical monopole antenna radiation field type in the Χ ζ plane and the γ ζ plane vertical directional field type (BroadsKleRadiation). 6th, 7th, and 8th are the antenna peaks of the antennas of the present invention in the low frequency, intermediate frequency, and south frequency bands, respectively, and the vertical axis represents the gain value (dBi), and the horizontal axis represents The operating frequency (GHz) is known from the experimental results. · Day = Benefit = 5/4.1 / 5.5 dBi 'has good operational characteristics', that is, the embodiment of the antenna of the present invention can produce good transceiving effects. Based on the above description, a planar dual (four) multi-frequency single=antenna of the present invention has three characteristics and an approximate material radiated field type; in addition, it is not only a good value but also has a very high axis value. 4 201214873 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view showing an embodiment of a planar double-turn type multi-frequency monopole antenna of the present invention. Figure 2 is a graph showing the measured return loss measurement results for an embodiment of the antenna of the present invention. Fig. 3 is a graph showing the measurement results of the radiation field type in the X-Y plane at 2.6 GHz, 3.5 GHz and 5.5 GHz according to an embodiment of the antenna of the present invention. Fig. 4 is a graph showing the measurement results of the radiation field type in the X-Z plane at 2.6 GHz, 3.5 GHz and 5,5 GHz according to an embodiment of the antenna of the present invention. Fig. 5 is a measurement result of radiation field type in the Y-Z plane operating at 2.6 GHz, 3, 5 GHz and 5.5 GHz according to an embodiment of the antenna of the present invention. . Figure 6 is a graph showing the measurement results of the antenna peak gain of the antenna in the low frequency band according to an embodiment of the antenna of the present invention. Figure 7 is a graph showing the peak value of the antenna in the middle frequency band of an embodiment of the antenna of the present invention. Figure 8 is a graph showing the measurement results of the antenna peak gain of the antenna in the high frequency band according to an embodiment of the antenna of the present invention. [Main component symbol description] 10 dielectric substrate Η back ground metal surface 12 signal feeding microstrip metal wire 13 signal feeding position 14 first U-shaped radiation metal sheet 15 second U-shaped radiation metal sheet 141 first U-shaped radiation metal sheet The starting end 142 is the middle arm of the first U-shaped radiating metal piece] 43 the end of the first U-shaped radiating metal piece 151 The starting end of the second U-shaped radiating metal piece 15 2 The middle arm 153 of the second U-shaped radiating metal piece End of two U-shaped radiation metal sheets