Integrated tunable magnetic RF inductor

Author

Vroubel, Marina ; Zhuang, Yan ; Rejaei, Behzad ; Burghartz, Joachim N.

Author_Institution

Lab. of High-Frequency Technol. & Components, Delft Univ. of Technol., Netherlands

Volume

25

Issue

12

fYear

2004

Firstpage

787

Lastpage

789

Abstract

We demonstrate, for the first time to our knowledge, a passive, electrically tunable integrated radio frequency (RF) inductor based on a planar solenoid with a thin-film ferromagnetic(FM) (NiFe) core. Variation of inductance is achieved by leading an additional dc current through the same device, thereby changing the effective permeability of the FM core. Tuning ranges (relative variations in inductance) of 85%, 35%, and 20% are achieved at 0.1, 1, and 2 GHz, respectively, for inductances in the range of 1 to 150 nH.

Keywords

ferromagnetic materials; inductance; inductors; permeability; thin films; 0.1 GHz; 1 GHz; 2 GHz; DC current; NiFe; effective permeability; inductance variation; integrated RF inductor; magnetic RF inductor; passive RF inductor; planar solenoid; radio frequency; thin-film ferromagnetic NiFe core; tunable RF inductor; tunable circuits; tunable devices; Circuit optimization; Inductance; Magnetic cores; Magnetic field measurement; Magnetization; Permeability; Radio frequency; Solenoids; Thin film inductors; Tunable circuits and devices; 65; Inductor; RF; on-chip; radio frequency; tunable circuits and devices;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2004.839208

Filename

1362775