Dr. Hishem Hyani Profile

Dr. Hishem Hyani

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Proceedings Article | 10 June 2024 Presentation + Paper

Toward electromagnetic jets for detection, imaging, and local characterization applications

B. Sauviac, A. Ghaddar, A. Deubaibe , H. Hyani , B. Bayard

Proceedings Volume 12991, 1299102 (2024) https://doi.org/10.1117/12.3022051

KEYWORDS: Waveguides, Microwave radiation, Electromagnetism, Antennas, Reflection, Free space, Dielectrics, Opacity, Electric fields, Plane waves

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We present an overview of our latest investigation regarding microwave Electromagnetic Jet (EMJ) dedicated to detection, imaging and characterization applications. First EMJ proposed is a parallel plate waveguide loaded with Teflon and terminated with both single and dual elliptically shaped tips. The experimental result shows the generation, respectively, of a single or a double EMJ as numerically expected. To simplify the manufacture of the tips, a rectangular tip replaced the elliptical termination. The numerical results demonstrated an increase in intensity and low FWHM of the beam, especially when using a multi-rectangular section of the tip. Furthermore, a rectangular waveguide with a rectangular tip was also introduced as an alternative to produce the EMJ in two transverse directions. Finally, to obtain a rotationally symmetrical jet, a horn antenna loaded with Teflon and ended with a cylindrical Teflon shape was proposed. In term of application, the developed microwave electromagnetic jet demonstrates the capability to detect extremely small objects not detectable by conventional microwave systems. In addition, at the focal point, the jet exhibits an almost planar wavefront, indicating the possibility of using the jet for local characterization applications in mesoscale free space measurements.

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