为了研究集成光波导电场传感器分段电极的频率响应特性，采用时域有限差分法进行了数值计算，并在吉赫兹横电磁波室中对实际制作器件的频率响应特性进行了测试。结果表明，当分段数固定在10、电极总长度从42mm减小到12mm时，频率响应带宽从2.68GHz增加到5.91GHz；而当电极总长度保持为42mm、分段数从10增加到30时，频率响应带宽从2.68GHz减小到2.51GHz，变化不大。实际测试的结果与仿真结果大致相符。

In order to study the frequency response characteristics of segment electrodes in an integrated optical waveguide electric field sensor, they were calculated by means of finite difference time domain method, and were measured in the actual gigahertz transverse electromagnetic wave(GTEM)cell. The results show that, when the segments number is 10 and the total length of electrodes decreases from 42mm to 12mm, the responding frequency bandwidth increases from 2.68GHz to 5.91GHz; when the total length of electrodes is 42mm and the segment number increases from 10 to 30, the bandwidth of responding frequency decreases slightly from 2.68GHz to 2.51GHz. The simulated results are consistent with measurement results.