TY - GEN
T1 - Radiation efficiency assessment of bundled carbon nanotube antenna at terahertz frequency range
AU - Choi, Sangjo
AU - Sarabandi, Kamal
PY - 2011
Y1 - 2011
N2 - The radiation efficiency of bundled carbon nanotubes (BCNTs) for the fabrication of antennas in the terahertz frequency range is evaluated. The performance is compared against thin gold film, which is conventionally used for antenna fabrication. The macroscopic behavior of BCNTs is modeled by an anisotropic thin resistive sheet model and its surface resistivity is extracted from the theoretical distributed circuit model of a single wall carbon nanotube (SWNT). Also, a thin gold layer in terahertz band is characterized by the Drude-Smith model which calculates the theoretical conductivity of fabricated thin gold in optical frequency. Conventional half-wave strip antennas are designed to resonate from 1 THz to 50 THz and the method of moments (MoM) and the mixed potential integral equation (MPIE) techniques are utilized to calculate radiation efficiencies of the resonant strip antennas composed of BCNTs and thin gold film. The numerical simulation result shows that the radiation efficiency of a BCNT antenna is consistently lower than the efficiency of a gold film antenna in cases of BCNT equivalent density values up to 10 4 [CNTs/μm]. However, if equivalent density values above 10 4 [CNTs/μm] could ever be achieved, which are approximately three order of magnitude higher than the currently realizable density (10 [CNTs/μm]), BCNTs would outperform thin gold film at frequencies above 1 THz.
AB - The radiation efficiency of bundled carbon nanotubes (BCNTs) for the fabrication of antennas in the terahertz frequency range is evaluated. The performance is compared against thin gold film, which is conventionally used for antenna fabrication. The macroscopic behavior of BCNTs is modeled by an anisotropic thin resistive sheet model and its surface resistivity is extracted from the theoretical distributed circuit model of a single wall carbon nanotube (SWNT). Also, a thin gold layer in terahertz band is characterized by the Drude-Smith model which calculates the theoretical conductivity of fabricated thin gold in optical frequency. Conventional half-wave strip antennas are designed to resonate from 1 THz to 50 THz and the method of moments (MoM) and the mixed potential integral equation (MPIE) techniques are utilized to calculate radiation efficiencies of the resonant strip antennas composed of BCNTs and thin gold film. The numerical simulation result shows that the radiation efficiency of a BCNT antenna is consistently lower than the efficiency of a gold film antenna in cases of BCNT equivalent density values up to 10 4 [CNTs/μm]. However, if equivalent density values above 10 4 [CNTs/μm] could ever be achieved, which are approximately three order of magnitude higher than the currently realizable density (10 [CNTs/μm]), BCNTs would outperform thin gold film at frequencies above 1 THz.
UR - https://www.scopus.com/pages/publications/81255179252
U2 - 10.1109/URSIGASS.2011.6050396
DO - 10.1109/URSIGASS.2011.6050396
M3 - Conference contribution
AN - SCOPUS:81255179252
SN - 9781424451173
T3 - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
BT - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
T2 - 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011
Y2 - 13 August 2011 through 20 August 2011
ER -