摘要
对具有一定入射角的波束经球面镜聚焦后焦点区域场的分布进行理论计算与实验测试,结果表明:在毫米波光栅谱仪(25～100GHz)中大球面镜聚焦系统明显限制了频谱分辨率.增大光栅对波束的衍射角是减小和消除这一限制的有效方法.
The field distributions of the focal region, where the beam with a certain incident
angle is focused by the spherical reflector, are theoretically calculated and measured. The
results give evidence that the focusing system of the spherical reflector in grating
spectrometer for millimeter waves (25~100GHz) strongly limits its resolving power. In-
creasing the diffraction angles of the diffracted beam from a grating is an effective way to
abate or eliminate this limit.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第6期425-429,共5页
Journal of Infrared and Millimeter Waves
关键词
光栅
分辨率
极高频
谱仪
millimeter waves, grating spectrometer, resolving power, focal field, integration method.
