Transmission Line Based Metamaterials for Acoustic Waves

We present our recent work on a one-dimensional acoustic negative refractive index metamaterial based on the concept of dual transmission line extensively investigated in microwave engineering. The proposed structure consists of an acoustic waveguide periodically loaded with membranes realizing the function of series “capacitances” and transversally connected open channels realizing shunt “inductances”. It exhibits a negative refractive index band over almost one octave, from 0.6 to 1 kHz. Using formal analogies, we describe how simple acoustic circuit models can be used for efficient design of metamaterials both in terms of dispersion and impedance.


Published in:
Proceedings of the XXX General Assembly and Scientific Symposium of the International Union of Radio Science
Presented at:
XXX General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS 2011), Istanbul, Turkey, August 13-20, 2011
Year:
2011
ISBN:
978-1-4244-5118-0
Keywords:
Laboratories:




 Record created 2011-12-01, last modified 2018-03-17

Publisher's version:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)