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Title: Electromagnetic Modeling for the Optimized Design of Spatial Power Amplifiers with Hard Horn Feeds
Authors: Ozkar, Mete
Advisors: Amir Mortazawi, Chair
Frank Kauffman, Member
Gianluca Lazzi, Member
Zhilin Li, Member
Issue Date: 5-Mar-2002
Degree: PhD
Discipline: Electrical Engineering
Abstract: An electromagnetic analysis tool for the analysis of spatial power amplifiers excited with hard horn feeds is developed. The analysis is performed using a generalized scattering matrix (GSM) approach. This approach employs different numerical techniques for analyzing the modules that make upthe system. The GSM of the overall system is obtained by cascading the GSM of each of the modules. Different numerical techniques such as finite difference time domain (FDTD) and mode matching are used here for an efficient and accurate analysis of a waveguide based power combiner/divider structure. This analysis makes it possible to further investigate the effect of the design parameters on the performance of the waveguide based power combiners. The fault tolerance of spatial power combiners against device failures is also investigated through the electromagnetic simulation of an already built spatial amplifier array. This particular simulation is achieved through a combination of different techniques (an already available method of moments code and a commercial finite element method (FEM)).
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