In addition to alternating phase difference between two aims of interferometer, the intensity of light of the interference fringes will vary in the samefrequency, which is called as phase modulation.
当两相干光附加一按固定频率变化的相位差时，其干涉条纹的光强将随之交变，即为相位调制干涉。
2
Trans station interference is a distant interference of the samefrequency in multi station microwave transmission.
越站干扰是微波多站传输中的一种同频远端干扰。
3
The frequency, electromagnetic, Sparks, electrostatic interference, the two sensors have two polar same signal.