Reflection-Type CW-Millimeter-Wave Imaging with a High-Sensitivity Waveguide-Mounted Electro-Optic Sensor
Reflection-Type CW-Millimeter-Wave Imaging with a High-Sensitivity Waveguide-Mounted Electro-Optic Sensor
复制标题
使用安装在波导上的高灵敏度电光传感器进行反射型连续毫米波成像
DOI：
10.1143/jjap.41.l83
复制
发表时间：
2002
影响因子：
1.5
通讯作者：
T. Nagatsuma
中科院分区：
文献类型：
--
作者：
A. Sasaki;T. Nagatsuma
我们提出了一种新的反射型成像系统，使用100 GHz的连续毫米波（MMW）。在该系统中，通过环行器将被物体反射的毫米波与入射的毫米波路径分离。分离的毫米波检测的高灵敏度的电光（EO）传感器安装在一个矩形波导。对于EO传感器，最小可检测MMW功率小于-60 dBm。使用连续波毫米波，我们可以直接获得振幅和相位图像的对象。该系统还具有高速机械载物台，可缩短图像采集时间。20,000像素的振幅和相位图像的采集时间小于10分钟。我们证明，反射型成像是有效的，提供重要的信息，不能通过传统的透射型成像。
We present a novel reflection-type imaging system that uses 100-GHz cw millimeter waves (MMWs). In the system, MMWs reflected by objects are separated from an incident MMW path by a circulator. The separated MMWs are detected by a high-sensitivity electro-optic (EO) sensor mounted in a rectangular waveguide. With the EO sensor, minimum detectable MMW power is less than -60 dBm. Using cw-MMWs, we can obtain both amplitude and phase images of objects directly. The system also features high-speed mechanical stages, which reduce image acquisition time. The acquisition time for 20,000-pixel amplitude and phase images is less than 10 min. We demonstrate that reflection-type imaging is effective in providing important information that cannot be obtained by conventional transmission-type imaging.