Dual-resonant search coil for natural electromagnetic waves in the near-earth environment
Dual-resonant search coil for natural electromagnetic waves in the near-earth environment
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近地环境中自然电磁波的双谐振搜索线圈
DOI：
10.1109/jsen.2012.2224863
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发表时间：
2013
影响因子：
4.3
通讯作者：
M.
中科院分区：
文献类型：
--
作者：
Ozaki;M.
设计了一种双谐振搜索线圈（DRSC）作为近地环境中自然电磁波的宽带磁强计。由于搜索线圈的频率响应由其谐振频率决定，因此可以通过使用多个谐振来增加其带宽。两线圈之间通过负互感电容耦合获得两个谐振。对于长度为100mm、直径为25mm、质量为0.11 kg的传感器，DRSC的测量波段为10hz ~ 1mhz。对DRSC谐振频率和增益曲线的理论分析与实测结果一致。DRSC的噪声等效磁感应强度在3khz时为40 fT/ hz1 /2，在140khz时为14 fT/ hz1 /2。该磁力计是第一个使用单个传感器和前置放大器实现两个共振的磁力计。
A dual-resonant search coil (DRSC) is designed as a wideband magnetometer for natural electromagnetic waves in the near-Earth environment. Since the frequency response of a search coil is determined by its resonant frequency, its bandwidth can be increased by using multiple resonances. Two resonances are obtained by capacitive coupling with negative mutual inductance between two coils. The resulting measurement band of the DRSC is from 10 Hz to 1 MHz for a sensor 100 mm in length, 25 mm in diameter, and 0.11 kg in mass. A theoretical analysis of the resonant frequencies and gain profile of the DRSC agree with measurements. The noise equivalent magnetic induction of the DRSC is 40 fT/Hz1/2at 3 kHz and 14 fT/Hz1/2at 140 kHz. This magnetometer is the first to realize two resonances using a single sensor and preamplifier.