为了对兰州彭宁离子阱LPT内的离子运动进行偶极和四极共振激发,采用变压器原理,设计制作了两套分相器:一套工作频率为200 k Hz～4 MHz,适用于四极激发模式;另一套工作频率为1700～1750 Hz,适用于偶极激发模式。详细测试了它们在空载和负载情况下的幅频曲线与相频曲线。测试结果表明:RF分相偏置电路的输出幅度与相位均达到了设计要求。 In order to conduct the dipole and quadrupole resonance excitation of ion motion in LPT of Lanzhou Pengning ion trap, two sets of phase splitters were designed and manufactured by the principle of transformer: a set of working frequency is 200 k Hz ~ 4 MHz, suitable for quadrupole Excitation mode; another set of working frequency is 1700 ~ 1750 Hz, suitable for dipole excitation mode. The amplitude-frequency curves and phase-frequency curves of them under no load and load were tested in detail. The test results show that the output amplitude and phase of the RF split-phase bias circuit meet the design requirements.