Local Oscillator and Focal Distance Measurement System for the Square Kilometre ArrayPOMPES PAR TRANSITIONS MULTIPLES

منو

" Local Oscillator and Focal Distance Measurement System for the Square Kilometre ArrayPOMPES PAR TRANSITIONS MULTIPLES "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	152559
Doc. No	:	ET24351
Main Entry	:	Leonid Belostotski
Title Proper	:	Local Oscillator and Focal Distance Measurement System for the Square Kilometre ArrayPOMPES PAR TRANSITIONS MULTIPLES
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	A system which simultaneously provides coherent local oscillator signal and mea-sures focal length for the Large Adaptive Reflector is discussed. The Local Oscillatorsubsystem provides a phasestable signal to an airborne platform over a radio link.A phase stability of 5"ms at 22 GHz is the goal for the system. Feedback is em-ployed to readjust the phase of the delivered signal, to compensate for changes in thetransmission medium. The dynamic properties of the Local Oscillator system arecontrolled primarily by a phase-locked loop. A Focal Length Measurement subsys-tem employing the Chinese remainder theorem for ambiguity resolution is proposed.The subsystem will measure the focal distance of 500 m with an accuracy of 70 pm.Both systems are based on interferometric techniques and are combined into one. Aprototype of the Local Oscillator subsystem has been built and tested to demonstratefeasibility of the concept..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL48558.pdf
Title and statement of responsibility and	:	Local Oscillator and Focal Distance Measurement System for the Square Kilometre ArrayPOMPES PAR TRANSITIONS MULTIPLES [Thesis]