Calibrateable microwave and millimeter wave measurement techniques for contactless and nondestructive material characterizations

用于非接触式和无损材料表征的可校准微波和毫米波测量技术

• 批准号: 222271899
• 负责人: Professorin Dr.-Ing. Bianca Will
• 金额: --
• 依托单位: Lehrstuhl Hochfrequenzsysteme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/222271899?language=en
• 关键词: Calibrateable; microwave; millimeter; wave; measurement

The objective of this project is the development of calibrateable measurement techniques for contactless and nondestructive material characterization with microwaves and millimeter waves. Measurement techniques for the characterization of complex scattering parameters of two ports based on reflection measurements are to be developed. These measurement techniques are based on transmission measurements, in which the receiving antenna is replaced by active reflectors and passive reflectors, respectively. Additionally, this project aims at the development of calibration methods for free space applications. In this case, the project is mainly focused on the reduction of the necessary number of calibration standards. The aim is the development of calibration methods without the necessity of mechanical displacements during the calibration procedure. Within this project a change of the electrical length due to a small frequency shift is used for the realization of a calibration standard instead of a change of the mechanical length.For the development and the verification of the measurement techniques and the calibration procedures, respectively, comprehensive three dimensional electromagnetic simulations are applied. Thus, influences of the measurement system and the surrounding, which are realistically emulated, are taken into account. In addition to the detailed emulation of the measurement environment, the simulations are based on realistic error networks given by a network analyzer. Based on the electromagnetic simulations serveral measurements campaigns for the verification of the developed measurement techniques are performed.Furthermore, fundamental considerations on the suitability of FMCW radar systems for material characterization in the frequency domain are performed.

该项目的目标是开发可校准的测量技术，用于利用微波和毫米波进行非接触和无损材料表征。将开发基于反射测量的表征两个端口的复杂散射参数的测量技术。这些测量技术是基于传输测量的，其中接收天线分别被有源反射器和无源反射器取代。此外，该项目旨在开发用于自由空间应用的校准方法。在这种情况下，该项目主要集中在减少必要的校准标准数量。其目的是开发不需要在校准过程中进行机械位移的校准方法。在这个项目中，利用微小的频移引起的电气长度的变化来实现校准标准，而不是改变机械长度。为了开发和验证测量技术和校准程序，分别使用了全面的三维电磁模拟。因此，考虑了测量系统和周围环境的影响，这些影响是真实地仿真的。除了对测量环境进行详细的仿真外，这些仿真还基于网络分析器提供的真实误差网络。在电磁模拟的基础上，进行了几次测量活动，以验证所开发的测量技术。此外，还对FMCW雷达系统在频域中进行材料表征的适用性进行了基本考虑。