AN OPTICAL TRUE TIME-DELAY BEAMFORMER FOR TWO-DIMENSIONAL PHASED-ARRAY ANTENNA SYSTEMS

摘要

The present invention is to optically control the two-dimensional phased array antenna system, the FBG prism and the metal thin film wavelength-dependent optical delay line using real-time (true time-delay), and 2 2 relates to a beam shaper consisting of a wavelength-independent optical TTD using an optical fiber delay line switch column. To this end, the wavelength-dependent optical TTD using a FBG prism generates a time delay difference is input to an array of antenna elements in one direction (azimuth or elevation) linearly, in a wavelength-independent optical TTD 2 2 optical fiber switch column so that the time delay differences were also generate linearly input to the antenna elements in the array direction perpendicular to the one direction through the matrix consisting of a delay line, in particular, wavelength-dependent optical TTD easily by attaching a thin metal film on each delay line end was operating in way so as to obtain the effect of one line plus the FBG, the wavelength-independent optical TTD using a switch for electrically operated bar for each column of the 2 2 optical switch at the same time (BAR) and the cross (CROSS) By controlling the scanning beam were to be very quick and simple.