Abstract
In this paper, we propose to use multi-folded transformation optics method to design a non-contact illusion device that can distantly and freely manipulate the radiation behavior of antenna located at a certain distance and such manipulation is enabled by the use of mapped electromagnetic medium coated with the transformed medium. The proposed design aims to achieve the radiation pattern of our choice from the antenna that does not possess any electromagnetic medium. Based on this, the functionality of parabolic antenna is distantly achieved from the point source. We further extended our idea to array of antennas in which the proposed device distantly makes the linear array of antennas behave like a geometrically different array of antennas. Our work extends the concept of illusion optics for active scatterer that will be very helpful for future antenna design.
Highlights
Apart from other TO-based devices, the illusion devices[29,30,31,32,33,34,35,36,37] are important that can fool the viewer into making the wrong decisions
We introduced the scheme of non-contact illusion device with the ability of achieving the desired radiation patterns from antenna while the antenna is unbounded with any EM medium
The beauty of the proposed design is that the transformed medium at a certain distance will behave exactly the same as the original EM medium bounded with the antenna
Summary
Apart from other TO-based devices, the illusion devices[29,30,31,32,33,34,35,36,37] are important that can fool the viewer (or detector) into making the wrong decisions. We use transformation EM to prove that it is possible to generate the desired emission from the “naked” source where no actual source is physically present In this regard, we introduced the scheme of non-contact illusion device with the ability of achieving the desired radiation patterns from antenna while the antenna is unbounded with any EM medium. A simple antenna source is manipulated to achieve the desired radiation pattern while the antenna source is not physically in contact with the proposed device In this case, the observer will have the impression that the emission is coming from a different position instead of its real physical location. The proposed non-contact concept is devoted to create illusions for active scatterer (antenna) and in each example; the designed device is placed at a certain distance from the active sources. Full wave finite element method is used to verify the expected behavior of our proposed concept in order to distantly and freely manipulate the radiation patterns
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