Title :
Adjustable dielectric using magnetically aligned conductive particles for microwave applications
Author :
Moon, Sungwook ; Chappell, William J.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
In this work, we propose a novel approach to adjust a dielectric constant using a magnetically aligned anisotropic conductive epoxy for microwave systems. The purpose of this approach is to produce large adjustability of dielectric constants by controlling the orientation of conductive particles using a magnetic technique in a viscous medium. In the experiment, we demonstrated that the dielectric constant of the material was adjusted from 4.7 to 10.8 and the Q ranges from 34 to 182 at 300 MHz depending on the intensity of a magnetic field. Due to the simplicity of this material, this technique for adjusting dielectric constant is expected to be able to be used to implement the high-Q capacitor for integrated microwave systems.
Keywords :
ferromagnetic materials; permittivity; anisotropic conductive particles; dielectric constant; frequency 300 MHz; integrated microwave systems; magnetic field; magnetically aligned anisotropic conductive epoxy; magnetically aligned conductive particles; Anisotropic magnetoresistance; Capacitors; Conducting materials; Dielectric constant; Dielectric materials; Magnetic anisotropy; Magnetic fields; Magnetic materials; Microwave theory and techniques; Perpendicular magnetic anisotropy; Dielectric constants; anisotropic conductive particles; de-embedding technique; ferromagnetic materials; magnetization; vertical interconnects;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5518060