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In this paper, a permalloy layer has been employed in the fabrication of a coupled line electromagnetic bandgap (EMBG) device to tune both amplitude and phase. A magnetically biased microwave coplanar configuration manufactured with evaporated permalloy has been measured, and a circuit modelling has been studied to evaluate the measured effects in terms of variable attenuation and phase shift. Starting from a permalloy made by the mixture 80% nickel and 20% iron content, we fabricated an electromagnetic bandgap (EMBG) structure based on a periodic arrangement of single sections of a transmission line with variable impedance, also including a central region with coupled lines. The bandpass characteristics of the EMBG device can be tuned by changing permalloy’s permeability through the application of a DC magnetic field (parallel to the plane of the structure). In particular, using a magnetic …
Publication date: 
15 Oct 2020

Martino Aldrigo, Alina Cismaru, Mircea Dragoman, Sergiu Iordanescu, Emanuela Proietti, Giovanni Maria Sardi, Giancarlo Bartolucci, Romolo Marcelli

Biblio References: 
Volume: 8 Pages: 190843-190854
IEEE Access