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This paper investigates the application of Adaptive Differential Evolution (DE) algorithm to enhance the performance of broadband antenna. A linear array consisting of half wavelength long unequally spaced parallel dipoles is designed to meet the increasing demand of extremely large bandwidth in wireless communication systems. Array is devised to maintain an almost invariable radiation patterns over...
In this article, Differential Evolution (DE) algorithm has been used to design a non-uniformly spaced collinear dipole array of uniformly optimized length. The goal is to generate a pencil beam in the horizontal plane with minimum Standing Wave Ratio (SWR) and fixed Side Lobe Level (SLL). Dynamic Range Ratio (DRR) of current amplitude distribution is kept at a fixed value. A simultaneous optimization...
A simple equivalent circuit analysis of the ring-bar slow-wave structure of a traveling-wave tube is developed, using the coupled transmission-line approach, for the dispersion and interaction-impedance characteristics of the structure. The effects of the ring and the bar widths of the structure are included in the analysis. The analysis is validated, with respect to 1) an X-band structure, against...
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