Title :
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
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;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2004.839208
