Reconfigurable Bandpass Microwave Photonic Filter With Ultrahigh Spectral Selectivity Based on Cascaded High-Q Silicon Microdisk Resonators

Reconfigurable Bandpass Microwave Photonic Filter With Ultrahigh Spectral Selectivity Based on Cascaded High-Q Silicon Microdisk Resonators

clockVolume: 74, Issue: 10, October 2026

authorYuwen Xu

Reconfigurable Bandpass Microwave Photonic Filter With Ultrahigh Spectral Selectivity Based on Cascaded High-Q Silicon Microdisk Resonators

Abstract
DOI: 10.1109/TMTT.2026.3730865   IEEEXplore: https://ieeexplore.ieee.org/document/11701411    
Device
Reconfigurable bandpass microwave photonic filter based upon cascaded high-Q silicon microdisk resonators.
Spectrum
2.77 – 20.52 GHz
Novelty
By leveraging the high-Q characteristics of microdisk resonators (MDRs), precise optical-to-electrical mapping enables ultrahigh-selectivity microwave filtering in the RF domain. An add-drop MDR layout with a surrounding slab waveguide enhances optical confinement and reduces propagation loss, while integrated metallic microheaters enable precise wavelength tuning.
Application
High-resolution radar and 6G wireless communication networks that require high fidelity spectral manipulation.
Performance
172.9 MHz 3-dB bandwidth, 2.77 – 20.52 GHz tuning range, 60.2 dB rejection ratio, 75.5 dB/GHz roll-off rate; 210.3 – 540.7 MHz 3-dB bandwidth tuning range with >49.3 dB rejection ratio and a flat-top passband response; 29.7 dB noise figure, 81.8 dB•hz2/3 spurious-free dynamic range.