Demonstration of a directional sonic prism in two dimensions using an air-acoustic leaky wave antenna

Journal Article · Mon Sep 28 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4932173· OSTI ID:22482183

Rohde, Charles A.; Calvo, David C.; Orris, Gregory J. ^[1]; Guild, Matthew D. ^[2]

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1. U.S. Naval Research Laboratory, Code 7165, Washington, DC 20375 (United States)
2. National Research Associateship Program, U.S. Naval Research Laboratory, Washington, DC 20375 (United States)

Analysis and experimental demonstration of a two-dimensional acoustic leaky wave antenna is presented for use in air. The antenna is comprised of a two-dimensional waveguide patterned with radiating acoustic shunts. When excited using a single acoustic source within the waveguide, the antenna acts as a sonic prism that exhibits frequency steering. This design allows for control of acoustic steering angle using only a single source transducer and a patterned aperture. Aperture design was determined using transmission line analysis and finite element methods. The designed antenna was fabricated and the steering angle measured. The performance of the measured aperture was within 9% of predicted angle magnitudes over all examined frequencies.

• OSTI ID: 22482183
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIR
ANTENNAS
APERTURES
DESIGN
FINITE ELEMENT METHOD
POWER TRANSMISSION LINES
PRISMS
TRANSDUCERS
WAVEGUIDES