Tunable Non-Reciprocal Ferrite Loaded SIW Phase Shifter

Sulav Adhikari (1) , Anthony Ghiotto (2) , Hemour Simon (3) , Ke Wu (1)

1 Poly-Grames
2 Conception / CSH
3 Poly-Grames

In this paper a tunable non-reciprocal Ferrite Loaded Substrate Integrated Waveguide (FLSIW) phase shifter is proposed. It is based on the non-reciprocal properties of an SIW line loaded with a single ferrite slab on one sidewall where the magnetic field strengths are strongest. With the application of an external magnetic bias on the ferrite slab, the propagation constant of the FLSIW is changed, thereby changing the phase of the FLSIW section. An X-band non-reciprocal tunable phase shifter prototype is demonstrated. It achieves an insertion loss of better than 2 dB, a return loss of better than 10 dB and allows a phase shifting of 400° at 0.24 T of externally applied magnetic field. As an application of the non-reciprocal phase shifter, an isolator is designed and fabricated, which offers an isolation of 20 dB at 12.5 GHz.

Mots clés: Phase Shifter; FLSIW; Isolator

Domaines: Electromagnétisme; Electronique

Sulav Adhikari, Anthony Ghiotto, Hemour Simon, Ke Wu. Tunable Non-Reciprocal Ferrite Loaded SIW Phase Shifter. IEEE MTT-S International Microwave Symposium (IMS2013), Jun 2013, Seattle, United States. pp.1-3, ⟨10.1109/MWSYM.2013.6697781⟩. ⟨hal-00873011⟩