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For generating a uniform and steady magnetic field,Helmholtz coil is extensively used in nuclear magnetic resonance gyro (NMRG).Unfortunately,the volume of Helmholtz coil makes it inconvenient to miniaturize NMRG.This study introduces Braunbeck coil that can be used in magnetic field excitation system.Braunbeck coil can produce homogeneous magnetic field within a limit space,and occupy a small volume.In addition,this study presents mathematical expressions that can be used to calculate the area of uniform magnetic field.Experimental test verifies the effectiveness of the proposed design,and the results accord closely with the actual simulation.