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《Journal of Naval University of Engineering》 2017-03
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Non-Foster impedance matching network technique for receive antenna

YAN Ya-long;LIU Chao;WU Hua-ning;DONG Ying-hui;College of Electronic Engineering,Naval Univ. of Engineering;  
A negative impedance device to cancel the antenna′s parasitic reactance is realized by nonFoster matching circuit,by which the antenna′s radiation resistance is transformed to a constant value and the gain-bandwidth limitation of traditional passive matching is avoided.In this way a superior broadband performance is achieved.A non-foster matching circuit of a 10 cm wire monopole antenna is designed and optimized.The simulation and practical tests are carried out,both of which fit quite well.The test result indicates that within the frequency range of 60~400MHz,the input resistance′s ima-ginary part of the antenna is canceled sufficiently and the signal-to-noise ratio is improved by up to 4dB as compared to the same antenna with traditional passive matching.The 3dB bandwidth of the antenna is improved by 11 MHz within the frequency range of 200~260 MHz.
【Fund】: 国家自然科学基金资助项目(61302099)
【CateGory Index】: TN827.2
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