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interferometery
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Digiatal Holographic Microscopy
, M.Sc. Thesis Sharif University of Technology ; Seyed Reihani, Nader (Supervisor)
Abstract
Digital holographic microscope is a microscope based on interferometry, which allows us to simultaneously have the information of the phase in addition to the intensity information. In this research, we intend to measure the thickness of the red blood cell with the help of an interferometer and prepare a three-dimensional microscopic image of the blood cell. After contamination, a laser beam hits an optical beam splitter that can divide the light into two parts with equal intensities. Each of these wave fronts, after hitting the mirror, is directed to another beam splitter to be recombined. . Since the incident lights have traveled different optical paths, they have a phase difference with...
Design and Implementation of a Low-noise X-band Microwave DRO using Interferometric Method
, M.Sc. Thesis Sharif University of Technology ; Banai, Ali (Supervisor)
Abstract
Microwave and millimeter wave engineering are now crucial to modern life. This field has developed as a result of its applications in non-destructive testing, communications, radars, imaging, and medicine. Oscillators generate the reference frequency in all of these applications, therefore utilizing an appropriate oscillator may have a significant influence on the performance and even the additional expenses of a microwave system. Phase noise is an example of an oscillator’s characteristic that is especially crucial. This characteristic results in a number of limitations in the system’s final performance. For instance, the phase noise of the local oscillator will be one of the causes of...
Evaluation of Phase Comparison DOA Estimation Methods in Multipath Environments for Millimeter Waves
, M.Sc. Thesis Sharif University of Technology ; Farzaneh, Forouhar (Supervisor)
Abstract
The main objective of this project is to discuss a DOA estimation system performance in a multipath environment. For this goal, first the basics of the DOA Estimation systems are discussed. Evaluation of different types of algorithms and choosing an appropriate one is an important step in this regard. Moreover the comparison of different array structures is necessary to choose the appropriate one. The major part of the project has been dedicated to discussion of multipath phenomenon as a major source of error in DOA estimation and studying the multipath mitigation algorithms to eliminate the aforementioned error. A model based on the concept of Bistatic Radar Cross Section is proposed to...