Open AccessExperimental research on terahertz scanning imaging system based on S-parameters
Author(s) -
Yanbo Zhang,
Xiangdong Li,
Xingwen Zhao,
Xianzhong Tian,
Zhengguan Yang
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2187/1/012044
Subject(s) - terahertz radiation , detector , computer science , image quality , visualization , spectrum analyzer , software , printed circuit board , data acquisition , optics , computer hardware , artificial intelligence , physics , image (mathematics) , telecommunications , programming language , operating system
Due to the limitations of the detector in the terahertz (THz) scanning imaging process and the problems of low contrast and poor visualization effect of original image, a THz continuous-wave scanning imaging system from 75 to 110 GHz is presented. The system is comprised of vector network analyzer (VNA), spread spectrum module, transmit and receive antennas, scanning stage and host computer. In addition, the automatic acquisition and storage of S-parameters is realized by Virtual Instrument Software Architecture (VISA) protocol, and the gray imaging method based on S-parameters is proposed. High-precision structural resolution test board is designed based on printed circuit board (PCB) method and the imaging experiment for the resolution test board is carried out. By comparing with original imaging results, better imaging quality of the system designed in this paper is obtained and imaging results show that the resolution of 1.8 mm could be achieved.