兔子 asked in 社會與文化語言 · 1 decade ago

~~一段有關天線的原文翻譯~~有把握翻譯者請進!!

This implies that an even smaller antenna size for a fixed CP operation can be achieved if one uses the present compact circularly polarized triangular microstrip antenna with a cross-slot in place of conventional CP designs of square or circular microstrip antennas [1].For the regular-size CP design in Figure 5.2(a), a narrow slot of dimensions L*1mm is embedded in the patch, with the slot oriented parallel to the bottom of the triangular patch and the slot center at the null-voltage point of the fundamental TM10 mode of the simple triangular microstrip antenna without a slot. It is then expected that, due to the slot perturbation, the equivalent excited patch surface current path of the TM10 mode along the direction perpendicular to the narrow slot is lengthened while the one parallel to the slot orientation is only slightly affected. This behavior results in the splitting of the TM10 mode into two near-degenerate orthogonal resonant modes. By further selecting the proper slot length and feeding the patch at a suitable position, the two near-degenerate orthogonal resonant modes can have equal amplitudes and a 90° phase difference, and CP operation can thus be obtained. Referring to the geometry in Figure 5.2(b), the feed position can be determined from the 50-Ω feed-location loci L1 and L2 of the two orthogonal modes, which are determined experimentally in this study.For the feed position at point A, which is the intersection of loci L1 and L2 and is usually located in the left half of the triangular patch, right-hand CP operation with a good matching condition is obtained.Left-hand CP operation is obtained by feeding the patch at point B (the mirror image of point A with respect to the centerline of the triangular patch).The antenna shown in Figure 5.2(b) is designed for compact CP operation.

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  • 1 decade ago
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    這意味著一個更小的天線尺寸為固定處長運作才能實現,如果使用目前的緊湊型圓極化三角形微帶天線具有跨插槽代替傳統的郊野公園設計的方形或圓形微帶天線[ 1 ] 。為正常大小郊野公園設計圖5.2 ( a )條,窄縫尺寸的l * 1毫米是嵌入在修補程序,與插槽面向平行的底部三角形補丁和槽中心在零電壓點的基本tm10模式簡單三角形微帶天線,沒有一個時段。這是當時的預計,由於該時段擾動,相當於興奮貼片表面電流路徑的tm10模式沿垂直方向向窄縫是加長,而其中一個平行於插槽的方向是只受輕微影響。這種行為的結果,在分裂的tm10模式,一分為二,近簡並正交諧振模式。通過進一步選擇適當的時段長度和餵養補丁,在一個合適的位置,這兩個近簡並正交諧振模式,可以有平等的振幅,並有90 °的相位差,和cp操作可因此獲得。在談到堅持幾何圖5.2 ( b )項,飼料中的地位才能確定,從50 -ω飼料地點位點l 1和l 2的兩個正交模式,是實驗確定在這s tudy.for飼料中的位置在a點這是相交的位點l1和l2是通常設在左一半的三角形補丁,右手邊的郊野公園運作有良好的匹配條件是obtained.left手警務處處長行動是得到餵養補丁在b點(鏡像點與敬意,向中線的三角形補丁) 。天線顯示,在圖5.2 ( b )條是專為緊湊型郊野公園。

    Source(s): teacher
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