Harpen M D
Department of Radiology, University of South Alabama, Mobile.
Magn Reson Med. 1993 Oct;30(4):489-93. doi: 10.1002/mrm.1910300412.
We present a model of birdcage resonator operation when the size of the resonator approaches a quarter wave length resulting in significant phase shifts along the current conducting elements. In the model resonators are treated as generalized transmission lines. Line termination determines whether the resonator is of the low pass or high pass type. The model correctly describes the dependence of resonant frequency on resonant mode number as well as the distribution of current along the length of the resonator.
我们提出了一种鸟笼式谐振器的工作模型，该模型适用于谐振器尺寸接近四分之一波长的情况，此时沿电流传导元件会产生显著的相移。在该模型中，谐振器被视为广义传输线。线路终端决定了谐振器是低通型还是高通型。该模型正确地描述了谐振频率与谐振模式数的关系以及沿谐振器长度方向的电流分布。
