一种用于低场磁共振波谱仪的圆极化线圈设计

汤世豪, 杨谨毓, 徐雅洁, 王亚, 彭博文, 高宇昊, 杨晓冬

A Design of Circularly Polarized Coil for Low-field Nuclear Magnetic Resonance Spectrometers

TANG Shihao, YANG Jinyu, XU Yajie, WANG Ya, PENG Bowen, GAO Yuhao, YANG Xiaodong

图8 鞍形与亥姆霍兹线圈的S参数测量结果. 左上角1号标签表示鞍形线圈在22.5 MHz频率下S11 = -28.814 dB；右上角曲线2号标签表示亥姆霍兹线圈在22.5 MHz频率下S22 = -27.333 dB；下方图像中的3号标签表示两线圈在22.5 MHz频率下间的隔离度为S21 = -22.992 dB

Fig. 8 Measurement results of the S-parameters for the Helmholtz and saddle coils. The label "1" in the upper left corner indicates that the curve corresponds to the saddle-type coil, showing S11 = −28.814 dB at 22.5 MHz. The label "2" in the upper right corner represents the Helmholtz coil, with S22 = −27.333 dB at the same frequency (22.5 MHz). The lower curve labeled "3" indicates the inter-coil isolation at 22.5 MHz, with an S21 parameter of −22.992 dB