This paper describes a ferrite low temperature co-fired ceramic (LTCC) edge-guided circulator. Traditional Y-junction stripline circulator has one ferrite disk surrounded by a dielectric material. A design of circulator presented here uses only ferrite LTCC. The material exposed under the magnetic bias shows its ferrite properties and the rest shows the dielectric properties. It has been demonstrated that a passive ferrite component like circulator could be realized on ferrite LTCC substrate without adding other materials. So this circulator could be integrated with other RF components such as antennas, amplifiers and filters etc in System-on-Package (SoP).

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Conference 9th European Microwave Integrated Circuits Conference, EuMIC 2014 - Held as Part of the 17th European Microwave Week, EuMW 2014
Yang, S. (Shicheng), Vincent, D. (Didier), Bray, J.R. (Joey R.), & Roy, L. (2014). Ferrite LTCC edge-guided circulator. In European Microwave Week 2014: "Connecting the Future", EuMW 2014 - Conference Proceedings; EuMIC 2014: 9th European Microwave Integrated Circuits Conference (pp. 596–599). doi:10.1109/EuMIC.2014.6997927