RT Conference Proceedings
T1 Practical Aspects of Acoustic Leaky-Wave Antennas Applied to Underwater Direction Finding.
A1 Felis-Enguix, Iván
A1 Otero-Vega, Jorge
A1 Campo-Valera, María
A1 Villó-Pérez, Isidro
A1 Gómez-Tornero, José Luis
K1 Acústica no lineal
K1 Acústica submarina
K1 Antenas
AB Acoustic leaky-wave antennas (ALWAs) have demonstrated the capacity to steer directive sound waves in frequency-dependent directions, due to the inherent dispersive radiation characteristic of leaky modes. Compared to more conventional uniform linear array (ULA) acoustic traducers for electronic beam steering (which rely on multiple sensors), the ALWA allows for single microphone operation. Thus, ALWAs offer a direct mechanism to scan a directive acoustic beam in the angular space by simply sweeping the operating frequency of the acoustic signal, which envisions cost-efficient single-transducer direction finders for SONAR applications. In this paper, we study for the first time some important features of an ALWA for acoustic underwater Direction-of-Arrival (DoA) estimation applications. First, we report for the first time on the necessity to shape the radiated ALWA beams in both far- and near-field zones to improve the DoA estimation performance, following similar techniques recently applied for low-cost frequency-scanned direction-finding radars based on LWAs. Furthermore, the capacity to reduce the Side Lobe Level(SLL) has been analyzed in order to improve performance, demonstrating aperture tapering techniques to the ALWA for the first time. These acoustic behaviour aspects have a considerable interest in real applications of ALWA in innovative SONAR systems for underwater scenarios.
PB MDPI
YR 2020
FD 2020
LK https://hdl.handle.net/10630/38300
UL https://hdl.handle.net/10630/38300
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026