Research on Effective Time with Mode Stirred Operation in Reverberation Chamber

The radio frequency susceptibility test method in reverberation chamber defined in RTCA DO160G required the time of the field strength remain above -3dB of the maximum value around the max field should be longer than the EUT response time. In general, with the same forward power injected in a chamber with two tuners, the greater the difference between two stirrers rotating speed, the greater the field strength will be received, but the effective time will be shorter. In this paper, we set 7 different rotating speed and measure the time in lGHz-2GHz band, there is an overall tendency for the effective time to decrease with increasing frequency for the same stirrer settings, and when two stirrers are set with different speed, the effective time is more affected by the stirrer with faster stirrer speed.