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標題Title: Capacitive Coupling Return Loss of A New Pre-ionized Monopole Plasma Antenna
作者Authors: 鍾慎修,Max Chung..等
上傳單位Department: 電子工程系
上傳時間Date: 2010-6-18
上傳者Author: 鍾慎修
審核單位Department: 電子工程系
審核老師Teacher: 鍾慎修
檔案類型Categories: 論文Thesis
關鍵詞Keyword: plasma antenna,adaptive antenna,smart antenna,stealth,radar cross section,ionization, radar
摘要Abstract: Plasma antenna has unique properties like low RCS and variable impedance; however, previous plasma antenna uses 500 MHz RF power to generate a plasma column, which is limited in energy efficiency and bandwidth. Here we introduce a new type of plasma antenna that generates plasma column with pre-ionization from a DC high voltage, and signal is coupled to the plasma antenna via capacitive coupling. This device greatly increases the overall energy efficiency and bandwidth of the plasma antenna. The electron density of the plasma is nearly constant in entire length, and is tunable in some degree by the DC
current. Two plasma antenna of 1m and 60 cm have been built and tested against same length metal antenna, the results are similar. Positive gain can be achieved at X-band. This device also shows a few obvious resonance lines where signal are absorbed strongly by the plasma. Return loss and radiation pattern of such antenna is reported.

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2010_6_204a84f5.pdf 430Kb pdf 355 236
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