Research on microwave properties of CVD graphene by using multiple-layer CPW resonator

Author

Wu, Yunqiu ; Xu, Yuehang ; Wang, Zegao ; Chen, Yuanfu ; Xu, Ruimin ; Tang, Zongxi ; Zhang, Biao

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

3

fYear

2012

fDate

5-8 May 2012

Firstpage

1

Lastpage

3

Abstract

In this paper, the microwave properties, including the phase shift and the loss characteristics of the chemical vapor deposition (CVD) graphene, are investigated. The multiple-layer CPW resonator is used as measurement fixture. The effective permittivity is deduced by partial capacity techniques (PCT), the cascade matrix is analyzed by microwave network theory, and the resonance is measured by vector network analyzer (VNA). The first and second orders of the resonance mode in GHz range have been measured and studied. The experimental results based on four graphene samples show that, the resonant frequencies are shifting downward by ~15MHz and the quality factors are remarkably decreased by loading the graphene into the resonator, which indicates the large microwave loss of the CVD graphene.

Keywords

Q-factor; chemical vapour deposition; coplanar waveguides; graphene; microwave resonators; network analysers; permittivity; C; CVD graphene; PCT; VNA; cascade matrix; chemical vapor deposition; effective permittivity; measurement fixture; microwave loss; microwave network theory; microwave properties; multiple-layer CPW resonator; partial capacity techniques; quality factors; resonance mode; vector network analyzer; Coplanar waveguides; Fixtures; Microwave measurements; Microwave theory and techniques; Q factor; Resonant frequency; Transmission line measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4673-2184-6

Type

conf

DOI

10.1109/ICMMT.2012.6230225

Filename

6230225