Publications by authors named "Zhongde Han"
The terahertz frequency modulated continuous wave (THz FMCW) imaging has proved to be a novel nondestructive testing (NDT) technology for non-metal materials, and the large bandwidth is usually required to meet high range resolution demands in many applications such as multilayer sample under test (SUT). However, broadband THz hardware is difficult to design. In this paper, an ultra-wideband THz FMCW generation method is proposed, which provides frequency modulation bandwidths of up to 386 GHz by time-division multiplexing.
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- Terahertz (THz) testing faces challenges with limited range resolution, which impacts the quality of signal detection.
- A new software method is introduced that uses a multiple signal characterization algorithm to enhance range profile resolution and extract important signal parameters more accurately.
- The method is validated through both simulations and real data from a 150-220 GHz FMCW imager, demonstrating significant improvements in detecting and reconstructing range profiles.