ISSN:
1572-9559
Keywords:
Grating spectrometer
;
Diffraction efficiency
;
Resolving Power
;
Lateral Shift
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract According to the angular-spectrum method, a radiation beam of an antenna horn in the Fresnal region is decomposed into the plane waves with the fast Fourier transform algorithm and the waves diffracted from a reflection grating are superposed as a diffracted beam. Compared with the reflected beam from the same size mirror, the radiation half width of the diffracted beam from a grating is narrower and its lateral shape is shift. These performances have been experimentally verified at Ka-band by: (1). The relative diffraction efficiencies in the first order with two triangular gratings which is put along propagating direction of a beam produced by a conical lens-horn. (2). H-plane lateral width with power—3dB lapsed of the focus beam from a grating and a mirror in a grating spectrometer for millimeter waves (25–100 GHz).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01009555
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