一种相位可调的多载波无源互调测试方法

A method for Passive Intermodulation measurements based on phase adjustable multicarrier

摘要:

随着多波束卫星通信技术的发展，收发共用技术被广泛应用，微波无源器件大功率引发的无源互调(PIM)效应面临着挑战。本文根据多波束卫星通信工作模式，在双载波测试PIM的基础上设计了一种相位可调的多输入多输出多载波PIM测试方法。考虑多载波叠加效应，开展了多载波PIM理论分析。组建的7路测试系统通过了-60~60 ℃天线馈源PIM试验，PIM电平稳定在-155 dBm以下。此测试系统已用于星载部件多载波无源互调性能检测。

Abstract:

With the development of multi-beam satellites communication and the wide application of transmit-receive technology, Passive Intermodulation(PIM) has become more seriously in the high power passive components. A PIM measurement method for phase adjustable Multiple-Input Multiple-Output(MIMO) multicarrier is presented based on that for dual carriers test according to the working mode of multi-beam satellites communication. Theories as well as experiments demonstrate the potentials and usefulness of the method. The experiments are conducted by the designed 7-channel test system under -60~60 ℃, and the PIM power level is below -155 dBm. The proposed test system has been applied to the multi-carrier components of satellites.