Title :
Pinhole device: a new type of thin film transformer
Author :
Tsujimoto, H. ; Nozawa, Y. ; Shirae, K.
Author_Institution :
Fac. of Eng. Sci., Osaka Univ., Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
A novel type of thin film transformer was fabricated using a strip line, an amorphous CoNbZr film, and a ground plane. This thin film transformer has three small pinholes in the magnetic film. The strip line was terminated to the ground plane through the hole. This is called a pinhole device. The output voltage increased with increasing excitation frequency. Applying a DC magnetic field decreased the output voltage above 800 MHz, and increased it below 800 MHz. It is concluded that the pinhole device can be used as a controllable transformer at very high frequencies
Keywords :
cobalt alloys; high-frequency transformers; magnetic properties of amorphous substances; magnetic thin film devices; niobium alloys; zirconium alloys; 500 to 1000 MHz; DC magnetic field; amorphous CoNbZr film; controllable transformer; ground plane; magnetic film; pinhole device; strip line; thin film transformer; very high frequencies; Amorphous materials; Frequency dependence; Magnetic devices; Magnetic fields; Magnetic films; Semiconductor thin films; Strips; Thin film devices; Thin film inductors; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
