Acoustically driven antennas operating at resonant wavelengths up to 105 times smaller than electrical antennas offer great potential for portable, low power communication systems in the very low frequency and low frequency range. Acoustic antennas with real resonant impedances have been demonstrated to offer orders of magnitude better total efficiency compared to similar sized, subwavelength electrically small antennas exhibiting large reactances. While most acoustic antennas share favorable impedance characteristics offering significant matching efficiency advantages over electrically small antennas, radiation efficiency varies greatly based on the implementation of the acoustically driven antenna. This paper presents a theoretical analysis of the three primary methods for implementing acoustically driven radiating elements, investigating both radiation and matching efficiencies comprising the total antenna efficiency. Radiation from the linear movement of unipolar charge driven both piezoelectrically and capacitively, the piezoelectrically actuated rotation of fixed dipole charges, and from flipping dipoles inside strain driven piezoelectrics are all presented and analyzed in terms of their design parameters and fundamental challenges. The efficiency of each type of acoustic antenna is referenced to an equivalent electrical antenna to benchmark the performance to a more familiar framework. Of the analyzed antenna types, piezoelectric alternating dipole antennas exhibit the most promise, with efficiencies more than a million times greater than electrically small antennas expected as piezoelectric materials, and resonator designs are optimized for acoustic radiation.
Skip Nav Destination
CHORUS
Article navigation
7 January 2020
Research Article|
January 06 2020
A theoretical study of acoustically driven antennas
Ahmed E. Hassanien
;
Ahmed E. Hassanien
a)
Department of Electrical and Computer Engineering,
University of Illinois at Urbana-Champaign
, 208 N Wright St., Urbana, Illinois 61801, USA
Search for other works by this author on:
Michael Breen
;
Department of Electrical and Computer Engineering,
University of Illinois at Urbana-Champaign
, 208 N Wright St., Urbana, Illinois 61801, USA
b)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Ming-Huang Li
;
Ming-Huang Li
c)
Department of Electrical and Computer Engineering,
University of Illinois at Urbana-Champaign
, 208 N Wright St., Urbana, Illinois 61801, USA
Search for other works by this author on:
Songbin Gong
Songbin Gong
Department of Electrical and Computer Engineering,
University of Illinois at Urbana-Champaign
, 208 N Wright St., Urbana, Illinois 61801, USA
Search for other works by this author on:
a)
Contributions: A. E. Hassanien and M. Breen contributed equally to this work.
b)Author to whom correspondence should be addressed: [email protected]
c)
Present address: National Tsing Hua University, Department of Power Mechanical Engineering, 101 Sec. 2 Kuang-Fu Foad, Hsinch 30013, Taiwan
J. Appl. Phys. 127, 014903 (2020)
Article history
Received:
October 03 2019
Accepted:
December 15 2019
Citation
Ahmed E. Hassanien, Michael Breen, Ming-Huang Li, Songbin Gong; A theoretical study of acoustically driven antennas. J. Appl. Phys. 7 January 2020; 127 (1): 014903. https://doi.org/10.1063/1.5129945
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
A step-by-step guide to perform x-ray photoelectron spectroscopy
Grzegorz Greczynski, Lars Hultman
Piezoelectric thin films and their applications in MEMS: A review
Jinpeng Liu, Hua Tan, et al.
Tutorial: Simulating modern magnetic material systems in mumax3
Jonas J. Joos, Pedram Bassirian, et al.