文件名称：Effects of Mutual Coupling on Interference Mitigation
文件大小：403KB
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更新时间：2017-08-29 10:20:27
Coupling FPA
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 elements 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.