Xu Y, Tang P
Department of Anesthesiology, University of Pittsburgh, Pennsylvania 15261, USA.
Magn Reson Med. 1997 Jul;38(1):168-72. doi: 10.1002/mrm.1910380123.
A practical design for a high-pass birdcage resonator is presented. Precision seamless telescoping tubes were used for easy tuning of resonant frequency by adjusting the length of the coils. Three probes, of 4.4, 5.0, and 25.0 cm in diameter, respectively, were constructed and tested. An empirical formula is given that can be used to calculate the capacitance needed for a given frequency when the desired physical dimension and the number of elements of the coll are specified. A simple three-step procedure is suggested for easy fabrication of resonators that are routinely tunable over tens of megahertz.
提出了一种高通鸟笼式谐振器的实用设计。采用精密无缝伸缩管，通过调节线圈长度来轻松调谐谐振频率。分别制作并测试了直径为4.4厘米、5.0厘米和25.0厘米的三个探头。给出了一个经验公式，当指定了所需的物理尺寸和线圈的元件数量时，该公式可用于计算给定频率所需的电容。建议采用一个简单的三步程序，以便轻松制造出可在几十兆赫兹范围内常规调谐的谐振器。
