Magnetic nanowires based reciprocal & non-reciprocal devices for Monolithic Microwave Integrated Circuits (MMIC)


The use of nanowires as a tunable stop-band notch-filter (reciprocal device) in a coplanar waveguide (CPW) geometry has been assessed. The stop-band frequency (fr) is observed to be tunable up to 24 GHz with an applied field (H) of 6 kOe in a parallel configuration and up to 14 GHz with an applied field (H) of 4 kOe in perpendicular configuration. Use of nanowires as microwave resonance-isolators (non-reciprocal devices) are realized and measured. The isolator is designed in the principle of a waveguide based E-plane resonance isolator. The attenuation of the wave in forward and reverse direction results a difference in transmission coefficients that shows a non-reciprocal effect. The isolation is ∼ 6 dB/cm at 23 GHz. The bandwidth of the device is relatively large (5-7 GHz) in comparison to ferrite-based devices.

Publication Title

Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, NSTI-Nanotech, Nanotechnology 2008

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