Development of Yttrium Iron Garnet Paste and Fabrication of Non-Reciprocal Microwave Components

Abstract

Development of Yttrium Iron Garnet (YIG) paste from pre-sintered green powders of YIG and the feasibility of fabricating microwave components using these pastes have been discussed. Transmission loss of a 50-ohm microstripline on YIG films was studied with different externally applied magnetic fields. Non-reciprocal field displacement isolator was fabricated on the YIG films and insertion loss, isolation and VSWR were measured. The results indicate that the devices made using YIG paste give better performance than those with ferrite pastes.

Indexing Terms:

• Microstrip Circuits
• Nonreciprocal Components
• Hybrid Technique

Additional information

Notes on contributors

Santiram Kal

Kal, Santiram: (b. 1952 March 9): Received B.Sc (Honours) and M.Sc degrees both in Physics; from the University of Burdwan in 1973 and 1975 respectively. He has been working in a DST sponsored research project on ‘Development of Low Loss Ferrimagnetic Ink in the Department of Electronics and Electrical Communication Engineering, IIT, Kharagpur. He joined the West Bengal Educational Service as a lecturer in Physics in 1980. His current research activities are in Ferrimagnetic film circuits, Microwave Integrated Circuits and Thick film and Thin film technologies.

D. Bhattacharya

Bhattacharya, D (Dr): (b. 1942 July 5): Received B.Sc (Honours) degree in Physics and M.Tech, in Radio Physics and Electronics both from the University of Calcutta in 1961 and 1964 respectively and PhD degree in 1973 from IIT, Kharagpur. Since October 1968, he is with the faculty of Electronics and Electrical Communication Engineering Department, IIT, Kharagpur. His current research activities are in the field of Microwave active devices, Microwave Integrated Circuits, Ferrimagnetic film circuits and Electromagnetics.

N.B. Chakraborti

Chakraborti, N B: He is a Professor of the Department of Electronics and Electrical Communication Engineering, IIT, Kharagpur. He received D.Sc degree from Calcutta University in 1974. His current research activities are in the field of Micro-electronics and Image Processing.