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该文报道了利用谐振变压器作为耦合网络,其传输比及Q值对超导磁强计性能的影响。阻抗匹配后的前置放大器噪声系数达2.3dB。耦合网络的Q值为2.5,它使磁强计有足够高的摆率和较宽的频响。 该文还介绍了改进后的模拟SQUID及其所构成的实验装置。这种装置能用于耦合网络的设计及系统摆率和频响的预测。
This paper reports the effect of the resonant transformer on the performance of the superconducting magnetometer by using the resonant transformer as the coupling network. After the impedance matching preamplifier noise figure of 2.3dB. The coupling network has a Q of 2.5, which allows the magnetometer to have a sufficiently high slew rate and a wide frequency response. The article also introduces the improved simulation SQUID and the experimental device it forms. This device can be used in coupled network design and system slew rate and frequency response prediction.