• 文献标题:   Nonlinear Microwave Characterization of CVD Grown Graphene
  • 文献类型:   Article
  • 作  者:   TUO MG, XU DC, LI S, LIANG M, ZHU Q, HAO Q, XIN H
  • 作者关键词:   equivalent circuit model, graphene, intermodulation, nonlinearity
  • 出版物名称:   IEEE ANTENNAS WIRELESS PROPAGATION LETTERS
  • ISSN:   1536-1225 EI 1548-5757
  • 通讯作者地址:   Univ Arizona
  • 被引频次:   2
  • DOI:   10.1109/LAWP.2016.2517180
  • 出版年:   2016

▎ 摘  要

Linear and nonlinear microwave properties of chemical vapor deposition (CVD)-grown graphene are characterized by incorporating a coplanar waveguide (CPW) transmissionline test structure. The intrinsic linear transport properties (S-parameters) of the graphene sample are measured and extracted via a deembedding procedure and then fitted with an equivalent circuit model up to 10 GHz. A statistical uncertainty analysis based on multiple measurements is implemented to estimate the error of the extracted graphene linear parameters as well. Nonlinear properties (second-and third-order harmonics as a function of fundamental input power) of the sample are also measured with a fundamental input signal of 1 GHz. Clear harmonics generated from graphene are observed, while no obvious fundamental power saturation is seen. The measured nonlinearity is applied in a graphene patch antenna case study to understand its influence on potential applications in terms of third-order intermodulation levels.