文件名称:
Effects of Mutual Coupling on Interference Mitigation
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文件大小: 403kb
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上传时间: 2014-08-09
详细说明： 焦平面耦合文章 Abstract—A focal plane array feed of electrically small elements has been proposed as a means for achieving high sensitivity for radio astronomy applications in the presence of radio frequency in- terference (RFI). For a broadband system, mutual coupling effects become significant as the array element spacing becomes small rel- ative to the electromagnetic wavelength. We present a theoretical framework for modeling the effects of mutual coupling and for de- termining the optimal multiport matching network between array el ements and front-end transistor low-noise amplifiers for max- imum signal-to-noise ratio (SNR). Numerical results are given for a model scenario including spillover and amplifier thermal noise and point signal and interference sources. A suboptimal self-impedance matching network yields performance close to that of a full net- work match. ...展开收缩
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