Nearfield Focusing, propagating a field with a known spatial field phase

8 次查看（过去 30 天）
Paul Schmalenberg
编辑： David Goodmanson 2024-6-4
Hello,
There is a fantastic page demonstrating near field focusing using the Phased Array toolbox located here: https://www.mathworks.com/help/phased/ug/examine-the-response-of-a-focused-array.html
These example use an array of emitters to define the excitation that then solves into the near field focused field. If we have an already spatially-defined complex wave input field, is there a way to propagate the field in the same way to show it focusing? Or is it possible to 'fake' the field using an array of closely spaced emitters and weights?
  3 个评论
显示 1更早的评论
Paul Schmalenberg
Paul Schmalenberg 2024-6-4
Hi George, if we take the 2D case (or 2D slice, such as the plot 'Single Steered and Focused Beam' in the link above), if we have the description or values for out of plane direction of Ez(x = 0, y) (and Ex, Ey = 0) for a certain frequency, is there a way to solve for the rest of (x,y)? Maybe as excitation by wire approximation?
I don't have any code at the moment, but I see solver pages like this: Solvers - MATLAB & Simulink (mathworks.com)
But is there a way to access these numerically? Or only through setting up antenna arrays with high level functions?
David Goodmanson
David Goodmanson 2024-6-4
编辑：David Goodmanson 2024-6-4
HI Paul, this sounds like the Kirchhoff vector integration theorem, where if the fields on a closed surface are known, the fields in the volume inside the surface can be calculated. It's not easy, a lot of the reason being due to approximations that are involved and how to justify them in a given situation.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 General Physics 的更多信息

标签

产品


版本

R2023a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by