Abstract-Active substrate integrated terahertz waveguide using periodic graphene stack

Yanfei Dong^1,a), Peiguo Liu¹, Dingwang Yu¹, Bo Yi¹ and Gaosheng Li¹
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1 State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics & Information System, National University of Defense Technology, Changsha 410073, China
a) Author to whom correspondence should be addressed. Electronic mail:dongyanfeicool@126.com
AIP Advances 5, 117237 (2015); http://dx.doi.org/10.1063/1.4936651

http://scitation.aip.org/content/aip/journal/adva/5/11/10.1063/1.4936651?TRACK=RSS
The transmission properties of a substrate integrated waveguide (SIW) based on periodicgraphene stacks have been theoretically investigated in the terahertz (THz) region. The effects of the dielectric-graphene-dielectric structure of the stack on the propagation properties are shown to be significant and different from the conventional active SIW based on active components. By varying the graphenechemical potential, the cut-off frequency of the proposed waveguide can be dynamically tuned from 3 to 3.7 THz. Moreover, the tunable waveguide displays low leakage loss and single-mode propagation with −120 dB stop-band attenuation.These primary results are very promising for THz integration devices and SIW-based systems.