太赫兹辐射
带宽(计算)
光学
图像分辨率
医学影像学
微波成像
计算机科学
合成孔径雷达
物理
电信
人工智能
微波食品加热
作者
D. Damyanov,Aman Batra,B. Friederich,Thomas Kaiser,Thorsten Schultze,Jan C. Balzer
出处
期刊:IEEE Access
[Institute of Electrical and Electronics Engineers]
日期:2020-01-01
卷期号:8: 151997-152007
被引量:17
标识
DOI:10.1109/access.2020.3017821
摘要
Imaging in the terahertz frequency range has attracted growing interests since the first image of a leaf more than 20 years ago, due to its countless applications in basic and applied research, medical imaging, and nondestructive testing. However, most terahertz imaging approaches rely on focusing optics which require knowledge about the imaging scene before the actual imaging takes place. Further, imaging is mostly restricted to short distances and high resolution is only achieved for systems with a high bandwidth. Here, we present a method that enables high-resolution imaging of small metallic and dielectric objects at distances up to 2 m based on a synthetic aperture. We derive a simple approximation for the resolution of partial circular synthetic apertures with limited bandwidth. The bandwidth limitation is encountered by replacing the measured signals with replica signals of high bandwidth and equal round-trip time so that the resolution is only limited by the carrier frequency and signal-to-noise ratio of the measurement system.
科研通智能强力驱动
Strongly Powered by AbleSci AI