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dc.contributor.authorMajeed, Farhat
dc.contributor.authorShahpari, Morteza
dc.contributor.authorThiel, David V
dc.date.accessioned2017-10-13T01:09:39Z
dc.date.available2017-10-13T01:09:39Z
dc.date.issued2017
dc.identifier.issn1096-4290
dc.identifier.doi10.1002/mmce.21103
dc.identifier.urihttp://hdl.handle.net/10072/348635
dc.description.abstractCarbon nanotube (CN) antennas have applications in the THz electromagnetic spectrum. Nanotubes have a highly dispersive and frequency dependent conductivity model. In this article, we compare the poles and zeros in the input impedance of CN antennas at different lengths. We used model-based parameter estimation to approximate the input impedance of the antenna with a rational function in the complex frequency domain. Despite dispersive conductivity of CN, the imaginary part of the poles and zeros are respectively the integer multiples and odd multiples of the imaginary part of the first pole and zero. However, the real part of poles is almost constant, while the pattern was not observed for the real part of zeros. We also show that CN dipoles operating between 43 and 53 GHz are well matched if the source impedance is much higher than 50 ohms, and even higher than 12.9 kΩ. The fundamental resonances (f0) of CN dipoles plotted versus their inverse-half-length (1/L) are linearly related, but the intercept of the fitted straight line is non-zero unlike that for perfect electric conductor (PEC) dipoles. This leads to non-linear variation in wavelength scaling of CN dipoles. The resonant CN antennas are relatively much shorter than PEC dipoles.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.relation.ispartofpagefrome21103-1
dc.relation.ispartofpagetoe21103-9
dc.relation.ispartofissue6
dc.relation.ispartofjournalInternational Journal of RF and Microwave Computer-Aided Engineering
dc.relation.ispartofvolume27
dc.subject.fieldofresearchElectrical engineering
dc.subject.fieldofresearchElectronics, sensors and digital hardware
dc.subject.fieldofresearchCommunications engineering
dc.subject.fieldofresearchcode4008
dc.subject.fieldofresearchcode4009
dc.subject.fieldofresearchcode4006
dc.titlePole-zero analysis and wavelength scaling of carbon nanotube antennas
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.hasfulltextNo Full Text
gro.griffith.authorThiel, David V.


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