A Nanoplasmonic Branchline Coupler for Subwavelength Wireless Networks

This article presents the new nanoplasmonic branchline coupler (BLC) by using an edge coupled coplanar waveguide (CPW) with a finite length suspended backed conductor. The proposed coupler is designed by using the theoretical transmission line (TL) method, which is established based on the basic cha...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2021, Vol.20, p.662-668
Main Authors: Thirupathaiah, Kola, Reddy, K. Sivanagi, Reddy, G. Ravi Shankar
Format: Article
Language:English
Subjects:
Conductors
Coplanar waveguide
Coplanar waveguides
Couplers
Coupling coefficients
Couplings
Impedance
Integrated circuits
nanoplasmonic
Optical frequency
Optical waveguides
PICs
Software
Software development tools
Strips
subwavelength
Transmission lines
Wave propagation
Wireless networks
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Summary:This article presents the new nanoplasmonic branchline coupler (BLC) by using an edge coupled coplanar waveguide (CPW) with a finite length suspended backed conductor. The proposed coupler is designed by using the theoretical transmission line (TL) method, which is established based on the basic characteristics of the related CPW structures. For this purpose, the normalized propagation constant, propagation length, and characteristic impedance of the conductor backed coplanar waveguide (CBCPW) structure are studied and analyzed by applying a fullwave analysis using CAD simulation software tool CST microwave studio suite. Mainly, the coupling coefficient of the BLC can be controlled by changing the length of the backed conductor. In this article, the BLC is designed and analyzed by using a finite length backed conductor based on the theoretical TL method at a 3-dB coupling coefficient. This newly designed coupler can operate at two arbitrary optical frequency bands (O-band and L-band). Hence, it allows us to exchange many other couplers with their narrow bandwidths using this branchline coupler for subwavelength nanoscale wireless network applications and photonic integrated circuits (PICs).
ISSN:1536-125X
1941-0085
DOI:10.1109/TNANO.2021.3101981