Nonreciprocal microwave devices based on magnetic nanowires

Kuanr, Bijoy K.; Veerakumar, V.; Marson, Ryan; Mishra, Sanjay R.; Camley, R. E.; Celinski, Z.
May 2009
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p202505
Academic Journal
We use magnetic nanowires in an alumina matrix as the active element in microwave nonreciprocal resonance isolators. The design is related to waveguide E-plane isolators but is planar and much smaller than typical waveguide isolators. There is a nonreciprocal attenuation of the wave in forward and reverse directions. The isolation is about 6 dB/cm at 23 GHz. The bandwidth of the device is relatively large (5–7 GHz) in comparison to ferrite-based devices. The central frequency of the device can be tuned with the application of magnetic field.


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