Demonstration of a directional sonic prism in two dimensions using an air-acoustic leaky wave antenna
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 28, 2015
- Source ID
- 10.1063/1.4932173
Entities
People
- Charles A. Rohde
- Christina J. Naify
- David C. Calvo
- Gregory J. Orris
- Matthew D. Guild
Organizations
- Office of Naval Research
- United States Naval Research Laboratory