【摘要】 针对经典电动力学中“正弦分布表面电流可产生理想均匀磁场”这一概念，沿着技术发展的思路，不仅追溯其历史渊源，而且简要介绍了它在磁体工程、加速器、核磁共振及医学磁共振成像等现代活跃技术领域中的新发展、新应用．更多还原

【Abstract】 The historical development and the modern application of a classical concept in electrodynamics about that a sinusoidally distributed surface electric current can generate an ideal homogeneous magnetic field are introduced. Some active examples such as saddle coil, birdcage resonator and linear gradient coil are mentioned.更多还原