研究目的
To explore the reasons behind the higher noise level in extracting the scattering damping time compared to the chamber decay time in total scattering cross section (TSCS) measurements and to model the statistical behavior of this noise.
研究成果
The study successfully models the statistical behavior of noise in TSCS measurements, providing guidelines for predicting noise levels and determining the required independent sample number. Good agreement between analytical and measurement results validates the approach.
研究不足
The study focuses on the noise level in TSCS measurements within a reverberation chamber and does not address other potential sources of error or noise in different measurement environments.
1：Experimental Design and Method Selection:
The study involves measuring the TSCS of an object in a reverberation chamber (RC) by analyzing the time-domain response to extract the scattering damping time. The noise level in these measurements is compared to that in power delay profile (PDP) measurements.
2：Sample Selection and Data Sources:
The measurements are conducted using a vector network analyzer (VNA) connected to broadband antennas, with stirrers controlled to rotate in a step-wise mode. S-parameters are recorded for different stirrer and antenna positions.
3：List of Experimental Equipment and Materials:
The setup includes a VNA, motor controller, broadband antennas (Ant 1 and Ant 2), and stirrers (H-stirrer and V-stirrer).
4：Experimental Procedures and Operational Workflow:
The H-stirrer is rotated for a number of positions, and the process is repeated for different antenna positions or V-stirrer positions to increase measurement accuracy. The time-domain response is obtained from the inverse Fourier transform (IFT) of the measured S
5：Data Analysis Methods:
The noise level in TSCS measurements is analyzed using statistical models, and the results are compared with theoretical predictions.
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