The model of 10 kV XLPE cable joint was established

in which the characteristics of electromagnetic（EM） wave resulted from partial discharge（PD） was simulated using a Finite Integration Technique（FIT）.Factors influencing the electric field intensity and induced energy of UHF signals were analyzed

including the propagation modes

the signal attenuation characteristics and the relationship between original PD pulse waveform and cumulative energy of signals.The simulation results indicate that quasi-TEM is the main propagation mode of EM wave in cable joints

and the transverse component of electric field is much greater that the longitudinal one.Electric field intensity and induced energy has a clear decline with the raise of sensing distance on the whole

while in the part where the cavity diameter reduces due to the thickness of conductive silicon rubber

induced energy increases as the reflection of electromagnetic wave gets up.Original PD pulse waveform influences the intensity of UHF signals detected by the probes.Induced energy gets higher when the pulse steepens and the amplitude of excitation pulses increases.