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題名 | 導體板上螺旋行進電流波之輻射功率分析 |
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作 者 | 柯盟卿; | 書刊名 | 明志工專學報 |
卷期 | 19 1987.05[民76.05] |
頁次 | 頁11-20 |
分類號 | 448.53 |
關鍵詞 | 輻射功率; 螺旋行進電流波; 導體板; |
語文 | 中文(Chinese) |
中文摘要 | 本文利用邊界值問題之求法,解出導體反射板影響下,螺旋行進電流波之輻射功率密度分布與螺旋匝數、節距角之關係。在本項研究中著者設計程式計算出頻率為11.996GHz,螺管直徑D=7.958×10□m,匝數分別為10匝、15匝、20匝而節距角α=15°、30°、45°、60°,行波電流激勵下之輻射功率場型。由計算出的場型可以看出節距角越大時,其副葉(sode-lobe)之數目越多,這可顯示輻射模次n(radiation mode n)也越大,是由於電流波是順著螺旋分布的,而就螺管之圓周來看,其激勵的模次也因而越高。另一方面本文對於相同之螺旋結構對於行波激勵與駐波激勵所產生之功率場型也作一比較。 |
英文摘要 | By the methods of solving boundary value problems, the radiation power of a helical traveling wave current is analyzed under the influence of a plane conductor. The relation between the power pattern and number of turns of the current source with various pitch angles have been shown in this paper. The author has also provided the program to calculate the power pattern with pitch angles α= 15°, 30, °45°, 60° while the number of turns N=10, 15, 20 at the frequency 11.996GHz with the diameter of helix D = 7.958 ×□m respectively. From the result of power calculation, it has been shown that the larger the itch angle is, the more the sidelobes appear. Because the radiation mode are thus increased in accordance with current distribution along the helix. It leads to nonuniiformly excitation in the direction of circumference. ON the other hand, it has made a comparison between traveling wave excitation and standing wave excitation for the power pattern at the same helical structure. |
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