Journal
APPLIED PHYSICS LETTERS
Volume 102, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4807280
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Funding
- Office of Naval Research
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Development and experimental realization of an acoustic leaky wave antenna are presented. The antenna uses a one-dimensional composite right/left hand transmission line approach to tune radiation angle continually from backfire-to-endfire, including broadside, as a function of input frequency. An array of acoustically loaded membranes and open channels form a structure with negative, zero, or positive refractive index, depending on excitation frequency. The fast-wave radiation band of the antenna is determined using acoustic circuit analysis. Based on the designs specified by circuit and finite element analysis, an acoustic leaky wave antenna was fabricated, and the radiation direction measured at discrete frequencies. (C) 2013 AIP Publishing LLC.
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