چكيده به لاتين
Abstract
Phase shifters are made of the main components of antenna phase array radars, which are typically made using ferrite materials, field effect transistors, pin diodes and microelectromechanical methods. Low signal losses, small size, low cost and high bandwidth are the most important features Phase shifters are used in such radars.
In recent years, the invention and use of artifical materials with a negative refractive index in telecommunication equipment and systems has created a new window in the field of telecommunications. The use of metamaterials in phase shifters improves specifications, especially signal reduction losses and dimensional compression. This thesis presents the design, simulation and optimization of phase shifters with low signal dimensions and losses in the frequency range of 8 to 12 GHz (X band) using a diode-loaded transmission line method based on metamaterial. metamaterial, composite materials have unusual electromagnetic properties, with limited and precise changes in their structure can be adjusted. In this thesis, while examining the metamaterial features, their most significant features in improving the performance of phase shifters used in phase array antennas are discussed. Research methods, review and study of recent research in this field, including books, articles and dissertations, then data analysis, component design using theoretical and mathematical principles and finally simulation and optimization by ADS software. The results show a reduction in losses and dimensions of the designed phase shifter. The innovation of this research is the use of metamaterials to improve the phase shift specifications, including reducing the dimensions and signal losses.
Keywords: phase array radar, phase shifter, metamaterial, transmission line with negative refractive index, combined right and left hand.
