A Simple Experimental Method to Analyze the Properties of Terahertz-wave Propagation in Complex Atmosphere

摘要

In this paper, a much simple experimental method is proposed to analyze the terahertz-wave propagation properties. The schematic diagram and process of parameters retrieval are presented in detail. Two terahertz-wave transmission paths are presented in one vacuum chamber but with different lengths. Two switches are required to select different transmission paths in a short time by which the system errors such as assembling error and instrumental error can be ignored. Different complex atmosphere can be injected into the vacuum chamber and its equivalent electromagnetic parameters such as propagation constant can be retrieved. Then the detailed propagation properties can be further calculated. The above method is certificated in full-wave simulation and the error is no more than 0.33% when isotropic material is used to simulate the atmosphere.