A Broadband Graphene-Based THz Coupler with Wide-Range Tunable Power-Dividing Ratios

Wu, Yongle, Qu, Meijun, Liu, Yuanan and Ghassemlooy, Zabih (2016) A Broadband Graphene-Based THz Coupler with Wide-Range Tunable Power-Dividing Ratios. Plasmonics. ISSN 1557-1955 (In Press)

[img] Text
A Broadband Graphene-Based THz Coupler-YesColor-Final-V1.pdf - Accepted Version
Restricted to Repository staff only until 27 October 2017.

Download (1MB) | Request a copy
Official URL: http://dx.doi.org/10.1007/s11468-016-0409-9

Abstract

A wide-band coupler based on the graphene with inherent DC-block function and adjustable power-dividing ratios is proposed. This coupler uses three sections of the two-line coupled lines, four sections of the three-line coupled lines, and four graphene stubs (two U-shaped stubs and two rectangular stubs). The graphene stubs allow the coupler to own dynamic surface conductivity, which could be tuned by altering the chemical potentials. The tunable power-dividing ratios could be achieved by varying the chemical potentials applied to the U-shaped graphene stubs and the rectangular graphene elements, respectively. In addition, the widths of two-line coupled lines in the proposed coupler are analyzed to affect the power-dividing ratios in detail. Finally, the power-dividing ratios of the proposed coupler have a variation range from 5.4 to 9.56 dB at 1.75 THz with a flat 90° phase shift. The minimum −10 dB impedance bandwidth is 44 % from 1.47 to 2.3 THz, thus indicating a wide-band performance.

Item Type: Article
Uncontrolled Keywords: Wide-band, Coupler, Adjustable power-dividing ratios, Graphene
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 11 Nov 2016 09:31
Last Modified: 08 May 2017 23:14
URI: http://nrl.northumbria.ac.uk/id/eprint/28494

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence