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Second Harmonic Beam Shaping and Sensing in Dielectric Bow-Tie Antenna via Convex Optimization Array Synthesis Approach

1
Department of Information Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy
2
National Institute of Optics (INO), Via Branze 45, 25123 Brescia, Italy
3
Department of Electrical, Electronics and Computer Engineering, University of Catania, Viale A. Doria 6, 95126 Catania, Italy
4
National Inter-University Consortium for Telecommunications (CNIT), Viale G.P. Usberti, 181/A Pal., 3-43124 Parma (PR), Italy
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(8), 901; https://doi.org/10.3390/electronics8080901
Received: 9 July 2019 / Revised: 12 August 2019 / Accepted: 13 August 2019 / Published: 15 August 2019
(This article belongs to the Special Issue Microwave Imaging and Its Application)
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Abstract

We propose a convex optimization approach for an array synthesis pattern to enhance the electromagnetic field in the gap region of a dielectric bow-tie antenna. This method allows the induction of the desired antenna modes by exploiting the concurrent excitation of the structure with plane waves with different propagation directions and complex amplitudes. By engineering the excitation coefficients of the array, different modes are excited in the bow-tie antenna and the radiation pattern of the generated second harmonic (SH) field is modified accordingly. Using our approach, we demonstrate both the feasibility of performing synthesis of the SH radiation pattern in dielectric antennas and the possibility of developing innovative sensing applications in photonics. View Full-Text
Keywords: inverse source problem; bow-tie antenna; second harmonic generation; convex optimization; dielectric materials; antenna pattern synthesis inverse source problem; bow-tie antenna; second harmonic generation; convex optimization; dielectric materials; antenna pattern synthesis
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Rocco, D.; Di Donato, L.; Sorbello, G.; De Angelis, C. Second Harmonic Beam Shaping and Sensing in Dielectric Bow-Tie Antenna via Convex Optimization Array Synthesis Approach. Electronics 2019, 8, 901.

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