Amplitude and Phase Tuning of Microwave Signals in Magnetically Biased Permalloy Structures

IEEE Access

Romolo Marcelli¹  Giovanni Maria Sardi¹  Emanuela Proietti¹  Giancarlo Bartolucci¹  Sergiu Iordanescu²  Martino Aldrigo²  Alina Cismaru²  Mircea Dragoman² 

[1] CNR-IMM Roma, Rome, Italy;National Institute for Research and Development in Microtechnologies, IMT Bucharest, Voluntari (Ilfov), Romania;

关键词: Electromagnetic devices;    magnetic materials;    magnetic films;    magnetic properties;    microwave magnetics;   

DOI  :  10.1109/ACCESS.2020.3031310

来源: DOAJ

【 摘 要 】

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 H₀ (parallel to the plane of the structure). In particular, using a magnetic field up to 3000 Oe, it was possible to change the phase by ca. 45° and the amplitude by ca. 7 dB in the X band.

【 授权许可】

Unknown