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

Area of Science:

• Photonics
• Materials Science
• Electrical Engineering

Background:

• Broadband 5G communication necessitates nonreciprocal devices operating in the Ku band.
• Existing circulators often lack the wide bandwidth required for advanced communication systems.

Purpose of the Study:

• To implement a wideband photonic crystal circulator for Ku-band 5G applications.
• To enhance the operational bandwidth of circulators using asymmetric ferrite structures.

Main Methods:

• Introduced two partial-height triangular Ni-Zn ferrites into Al2O3 ceramic rod-arrays.
• Utilized asymmetric triangle sizes and self-matching techniques.
• Performed numerical simulations to optimize the design.

Main Results:

• Achieved a bandwidth of 1.00 GHz, an eightfold increase compared to symmetric designs.
• Demonstrated high isolation of 25.75 dB.
• Obtained a low insertion loss of 0.381 dB.

Conclusions:

• The proposed photonic crystal circulator with asymmetric Ni-Zn ferrites is suitable for future 5G communication systems.
• Optimized asymmetric design significantly enhances circulator bandwidth and performance.