Title :
Permeability evaluation of ferrite pastes, epoxies, and substrates over a wide range of frequencies
Author :
Riahi-Kashani, Mohammad Mansour ; Elshabini-Riad, Aicha
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
12/1/1992 12:00:00 AM
Abstract :
Two accurate methods for determining the magnetic constants of ferrite pastes, epoxies, and substrates are proposed. The first method is used for low-to-mid frequencies (DC-100 MHz) and is based on current images. The permeability is calculated from measurements of the inductance of thick-film spiral inductors printed on the magnetic material under investigation. The second technique is a frequency-domain coaxial cavity method and is used for the mid-to-high frequency range (50 MHz-2 GHz). The complex permeability is calculated using this method
Keywords :
ferrites; magnetic permeability measurement; magnetic thin films; polymers; substrates; 0 to 100 MHz; 50 to 2 GHz; complex permeability; current images; epoxies; ferrite pastes; frequency-domain coaxial cavity; inductance; magnetic constants; magnetic material; magnetic permeability; substrates; thick-film spiral inductors; Coaxial components; Ferrites; Frequency measurement; Inductance measurement; Magnetic materials; Permeability measurement; Permittivity measurement; Thickness measurement; Transmission line measurements; Zinc;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
