2018-04-05
Gain and Noise Performance of Non-Foster Matching Circuit for VLF Receiver Loop Antenna
By
Progress In Electromagnetics Research M, Vol. 67, 35-44, 2018
Abstract
Non-Foster matching circuits are those that can function as negative capacitors or inductors, and can thus overcome the gain bandwidth limitation of passive matching circuits for antennas. This paper presents a non-Foster matching circuit (NFC) for a very low frequency (VLF) receiver loop antenna. The bandwidth of the antenna was improved by 383%, and the average gain was improved in most bands compared to a passive matching circuit (over 15-30 kHz). In contrast to circuits reported in other publications, the signal to noise ratio (SNR) of the passive matching network performed better than the non-Foster matching network. To analyze this phenomenon, a noise model was developed for the simplified balanced NFC, and noise analysis was conducted between the non-Foster and passive matching networks, which indicates that the non-Foster matching circuits cannot provide a better SNR performance than the passive matching circuits under low noise figure level receiver conditions.
Citation
Ya-Long Yan, Chao Liu, Yin-Hui Dong, and Huaning Wu, "Gain and Noise Performance of Non-Foster Matching Circuit for VLF Receiver Loop Antenna," Progress In Electromagnetics Research M, Vol. 67, 35-44, 2018.
doi:10.2528/PIERM18020904
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