雙圓柱體結(jié)構(gòu)天線陣列輸入阻抗計(jì)算和阻抗匹配
Input Impedance and impedance matching of a dual-cylindrical antenna array
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摘要: 該文介紹了一種由雙圓柱體單元組成的全向天線輸入阻抗的計(jì)算方法。文中將全向天線分解為饋電子系統(tǒng)和輻射子系統(tǒng),同時(shí)將輻射子系統(tǒng)等效成一個(gè)N端口網(wǎng)絡(luò)。首先根據(jù)傳輸線上電壓、電流的傳播關(guān)系,推導(dǎo)出網(wǎng)絡(luò)的端口電壓,端口電流和端口阻抗,然后由傳輸線上阻抗變換關(guān)系推導(dǎo)出天線的輸入阻抗。從而可見,為實(shí)現(xiàn)該天線的阻抗匹配只須調(diào)節(jié)天線兩端的短路活塞位置。同時(shí),實(shí)測(cè)值驗(yàn)證了天線樣品反射系數(shù)的計(jì)算結(jié)果。
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關(guān)鍵詞:
- 天線陣列; 網(wǎng)絡(luò); 輸入阻抗; 阻抗匹配
Abstract: The input impedance of antenna array that consists of dual-cylindrical units is investigated. In this paper, the antenna array is separated into two parts: feeding sub-system and radiant sub-system. Simultaneously, the radiant sub-system is equivalent to a N-port network. First, a set of voltage equations is presented according to the transmission line theory, where the voltages, currents, and impedances for each port of network are deduced. Secondly, the relations between total input impedance and that of each port are given. It is indicated that the input impedance of the antenna can be matched by moving the two pistons at the ends. The measured data of the antenna sample verify the results of the calculation. -
陳明暉,余京兆,雙圓柱體結(jié)構(gòu)天線陣列的電流計(jì)算方法,電子科學(xué)學(xué)刊,2000,22(4),639-644[2]T.J.Judasz,B.B.Balsley,Improved theoretical and experimental mnodels for the coaxial colinear antenna,IEEE Trans.on Antennas and Propagation,1989,37(3),289-296. -
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