Complementary time domain and frequency domain echo suppression for accurate antenna field transformation in arbitrary measurement environments

在本研究项目的第一部分中，结合时域和频域方法抑制天线测量中的不希望的回波信号已经成功地研究和建立。传统的时域方法可以得到很大的改进，新的频域方法的基础上虚拟波束形成和源定位可以证明。通过结合已实现的时域和频域方法，即使在项目研究中考虑的“Moscow Chamber”等高反射环境中，也可以实现非常好的回波抑制。在这个延续项目中，它的目的是扩大范围的回波抑制方法的部分相干和无相位天线测量，这变得越来越重要，和天线测量，在测试中的天线和测量探头移动在测量过程中。此外，旨在以回波环境校准方法的形式建立回波抑制方法，其中校准程序应能够同时正确表征回波环境和待测未知天线。

In the first part of this research project, combined time domain and frequency domain methods for the suppression of undesired echo signals in antenna measurements have been successfully investigated and established. The conventional time domain methods could be improved considerably and novel frequency domain methods based on virtual beam-forming and source localization could be demonstrated. With the combination of the realized time domain and frequency domain methods, it was possible to achieve very good echo suppression even in highly-reflective environments such as the “Mosquito Chamber” as considered in the project studies. In this continuation project, it is intended to extend the scope of the echo suppression methods to partially coherent and phaseless antenna measurements, which become increasingly important, and to antenna measurements, where the antenna under test and the measurement probe move both during the measurements. Moreover, it is intended to establish echo suppression methods in the form of calibration methods for the echoic environment, where the calibration procedure shall be able to correctly characterize the echoic environment and an unknown antenna under test at the same time.