A novel tunable high impedance surface electromagnetic band gap metamaterials for RF and microwave applications

Author

Tian-Hong Loh;Zhengrong Tian;Pravin Patel

Author_Institution

Time, Quantum and Electromagnetics Division, National Physical Laboratory Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom

fYear

2015

fDate

7/1/2015 12:00:00 AM

Firstpage

1

Lastpage

3

Abstract

This paper presents a novel varactor based electronically tunable high impedance surface electromagnetic band-gap (HIS-EBG) metamaterial. The proposed structure is based on two-layer mushroom-like HIS-EBG ground plane, in which by controlling the DC bias voltage on the varactors, the effective capacitance can be adjusted which alters the resonance frequency. To assess the electromagnetic (EM) wave suppression property the structure is incorporated, as the ground plane, in a microstrip transmission line and it is experimentally characterized over the 500 MHz-10 GHz frequency band. Numerical simulations of the transmission coefficient for the whole microstrip system were performed. Both the simulation and measurement results are compared.

Keywords

"Varactors","Metamaterials","Transmission line measurements","Surface impedance","Impedance","Resonant frequency","Microstrip"

Publisher

ieee

Conference_Titel

Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2015 IEEE MTT-S International Microwave Workshop Series on

Type

conf

DOI

10.1109/IMWS-AMP.2015.7324931

Filename

7324931