太赫兹科学与电子信息学报2026，Vol.24Issue(2)：227-235,9.DOI:10.11805/TKYDA2025312
基于太赫兹参量源的高频段雷达散射截面测量
High-frequency Radar Cross Section measurement based on terahertz parametric source
摘要
Abstract
In response to the limitations of the radiation source power and the difficulty in controlling the measurement beam in high-frequency terahertz Radar Cross Section(RCS)measurements,a large-quiet-zone RCS measurement system based on the ultra-widely tunable high-power terahertz parametric source and quasi-optical reflective beam expansion is demonstrated.The system can achieve high-sampling-rate,high-sensitivity and high-frequency terahertz RCS measurements.A two-stage terahertz beam expansion and collimation optical path based on off-axis parabolic mirrors is designed by using Zemax software,which can uniformly expand terahertz beams at different frequencies to over 100 mm.Using the smooth aluminum spheres as the standard calibration targets,the reliability of the measurement system is verified at 3.2 THz and 5.7 THz.On this basis,RCS measurements of smooth aluminum plates,aluminum columns and missile models are completed,and the variation trends with terahertz frequencies are discussed.The measurement results show that the dynamic range of the measurement system can reach up to 68 dB,and the measurement accuracy is better than 3 dBsm.The RCS measurement system and measurement results can support the design of high-frequency terahertz radar systems and the scale-model measurements of large-sized targets.关键词
雷达散射截面/太赫兹波/高频段/大静区范围/相对定标法Key words
Radar Cross Section(RCS)/terahertz wave/high-frequency band/large quiet zone/relative calibration method分类
信息技术与安全科学引用本文复制引用
池静,钟凯,李方杰,郑逸哲,刘宇鑫,陈锴,李吉宁,徐德刚,姚建铨..基于太赫兹参量源的高频段雷达散射截面测量[J].太赫兹科学与电子信息学报,2026,24(2):227-235,9.基金项目
国家自然科学基金资助项目(62175184) （62175184）
