微波器件联接扭矩与无源互调间的关系

doi:10.3969/j.issn.1001-2400.2017.02.031

Abstract

Abstract:

Passive intermodulation (PIM) is a complex problem in high-power microwave devices and satellite communications. In this paper, an effective calculation method is proposed for revealing the mathematical model between torque and PIM power levels of microwave devices. First, the analytical formula for the intermodulation voltage is derived based on the nonlinear I-V characteristics of microwave devices. Second, the mathematical model of point sources is constructed by the transmission line theory. And the nonlinear coefficients are calculated by the I-V curves from measured experiments. By substituting the nonlinear coefficients into the point source model, PIM power levels under different torques are obtained. Eventually, the accuracy with which the point source model predicts the three-order power level is verified by experiments, which solves the problem of PIM prediction under different torques in microwave devices.

Key words: microwave devices, passive intermodulation, point-source model, nonlinear, torque

LI Jun;XU Zhuo;MA Xiaofei;LI Tuanjie. Relation between torque and passive intermodulation in microwave devices[J].Journal of Xidian University, 2017, 44(2): 185-190.

References

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Relation between torque and passive intermodulation in microwave devices

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