Electronic scanning of sonar beam from a phased array of acoustic transducers controlled through programmable digital delay lines
Proceedings of the Thirty-Fourth Southeastern Symposium on System Theory (Cat. No.02EX540) - Trang 366-370
Tóm tắt
Electronic scanning of the beam with phased arrays is faster compared to rotating antennas, and with the phased arrays kept stationery, the beam could be shifted in a manner as desired by the system by controlling the phases. By and large, delay lines are used for producing the necessary phase shifts for the array elements. The use of digital delay lines improve further the rate of scanning and avoids the installation of bulky acoustic delay lines whose performance characteristics are affected by the environment in which it is operated. The recently reported digital delay line has simplicity in controlling the delay lengths from a single analog source. This project employs that digital delay line for scanning the beam in linear directions and also for scanning a sector like raster scanning. The implementations and performance characteristics are reported.
Từ khóa
#Phased arrays #Sonar #Acoustic beams #Acoustic arrays #Acoustic transducers #Delay lines #Antenna arrays #Control systems #Phase shifters #Signal processingTài liệu tham khảo
balasubramanian, 1999, Delay-length-locked loop, Electronics World, 105, 910
balasubramanian, 1999, Voltage Control for a Digital Delay Line, Electronics World, 105, 826
skolnik, 0, Radar Handbook
skolnik, 0, Introduction to Radar systems