%0 Journal Article %J 2015 International Topical Meeting on Microwave Photonics (MWP) %D 2015 %T Ultra-high Q multimode waveguide ring resonators for microwave photonics signal processing %A Burla, Maurizio %A Crockett, Benjamin %A Chrostowski, Lukas %A Azaña, José %U http://dx.doi.org/10.1109/MWP.2015.7356707 %X We propose and experimentally demonstrate a novel type of silicon race-track resonators realized in standard SOI process with quality factors above 1.3 million. The proposed solution uses multi-mode waveguides (MMWG) and couplers in order to dramatically reduce the waveguide loss in the coupler and in the ring cavity, and therefore achieve high Q factors compared to previous implementations of resonators in SOI without sacrificing the free-spectral range. The resonator has been employed to demonstrate an RF notch filter with a 150 MHz stopband and 8 GHz tuning range. %8 10/2015