EFFECT OF LARGE SPHERICAL REFLECTOR ON RESOLVING POWER OF GRATING SPECTROMETER
毫米波光栅谱仪分辨率的研究

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.