高低温环境下测试卫星天线无源互调的系统

随着卫星通信大天线技术的快速发展，收发共用技术在卫星中得到了广泛的应用，高低温环境下的无源互调性能问题成为关注的重点。目前从设计角度通过仿真和计算解决温度对无源互调性能影响有局限性，为了提高在轨天线工作性能可靠性，在高低温环境中测试无源互调性能是一项有效的措施。研究开发了两种在高低温环境下测试PIM的测试系统，同时给出了目前此方法应用于实际工程条件的验证测试结果，充分满足地面验证需求。

Systems to test the passive intermodulation of satellite antenna in high and low temperature environment

With the rapid develop of large antenna technology in satellite communication, transmitter-receiver sharing technology has been widely used in satellites.Passive intermodulation(PIM) in high and low temperature environment has become focus of attention.At present,the simulation and calculation methods are limited to solve the problem of temperature influences to PIM performance from the design perspective.In order to improve the reliability of in-orbit antenna performance.It is an effect measure to test the PIM in high and low temperature environment.In this paper, two systems of testing PIM in high and low temperature environment are researched and developed.At the same time,the test results are given about this systems applied in practical engineering .The test system fully meet the verification requirements of ground test.