INVESTIGATION OF THE PHASE PERFORMANCE IN DUAL-TR TUBE

In this paper, the influences of phase difference between two single tubes of dual-TR tube on receiving lose and receiving VSWR in balaneed duplexer are investigated exper-imentally. The experimental results show, if the phase differenee is greater than 30 degrees, then the receiving loss will exceed 0.5 dB and the VSWB will increase correspon-dingly. It shows that the experimental results are comparable with the theoretical calculations.The relation between the phase of individual stage of the three-stage plug-in discharge tube and the phase of the dual-TR tube is investigated. The experimental results indicates that this relation approximately obeys the superposition principle.