Wideband Microwave Photonic Circulator Using Two Asymmetric Partial-Height Triangle Ferrites

Yong Wang; Biaogang Xu; Wenlong He; Hou Ian

doi:10.3390/ma15196689

Wideband Microwave Photonic Circulator Using Two Asymmetric Partial-Height Triangle Ferrites

Materials (Basel). 2022 Sep 27;15(19):6689. doi: 10.3390/ma15196689.

Authors

Yong Wang¹, Biaogang Xu², Wenlong He², Hou Ian¹

Affiliations

¹ Institute of Applied Physics and Materials Engineering, University of Macau, Macau 999078, China.
² College of Electronics and Information Technology, Shenzhen University, Shenzhen 518060, China.

Abstract

Broadband 5G communication requires the operation of nonreciprocal devices in the Ku band. A wideband photonic crystal circulator is implemented by introducing two partial-height triangular Ni-Zn ferrites into the Al₂O₃ ceramic rod-arrays. The asymmetric sizes of the two equilateral triangles paired with self-matching effectively extend the bandwidth of the circulator eight times over that of the symmetric scheme. Numerical simulations demonstrate that the photonic crystal circulator can obtain a bandwidth of 1.00 GHz with an isolation 25.75 dB and an insertion loss 0.381 dB through optimized matched triangle size ratio, suitable for applications in future communication systems.

Keywords: 5G; circulators; ferrites; microwave photonic; photonic crystal; wideband.

Abstract

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