Título: LENS ANTENNAS - Part 5.2: Graded index lenses.
Descripción automática: In this video, the presenter discusses various types of lenses and their applications in antenna design, focusing on the unique properties and performance of number lenses. The concept of using number lenses to produce high activation in specific configurations is explained, referencing a lens defined in 1945 by a certain individual. The presenter details the symmetric response and refractive index behavior of these lenses and how they interact with plane waves and cylindrical waves.
The video goes on to analyze the limitations and capabilities of lens antennas at different frequencies and sizes, touching upon the relationship between frequency, wavelength, and antenna performance. A 2012 paper is cited regarding the formulation for optimizing lens design relative to the center of the lens.
Additionally, the presenter describes a 'lens in the lens' configuration, which allows for the transformation of focal points within the lens to produce plane waves on the other side, simplifying the design and feeding mechanisms. Simulations are used to illustrate the effectiveness of this approach.
The video concludes with an examination of several renowned lenses, including Ito's lens, Luneburg's lens, and black hole lenses. The presenter explains how these lenses manipulate wave direction, refraction, and focusing properties, highlighting the current limits of refractive indices and material technology. The presenter ends by presenting the theoretical concept of a black hole lens, which could potentially trap waves at certain refractive indices, and thanks the audience for their attention.
Autor/a: Quevedo-Teruel Oscar
Curso: Este vídeo es el 47/62 del curso European School of Antennas. [ Ссылка ]
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