FEMTO-ST Institute 1 article published in JoVE Engineering Microwave Photonics Systems Based on Whispering-gallery-mode Resonators Aurélien Coillet1, Rémi Henriet1, Kien Phan Huy1, Maxime Jacquot1, Luca Furfaro1, Irina Balakireva1, Laurent Larger1, Yanne K. Chembo1 1Optics Department, FEMTO-ST Institute The customized techniques developed in our lab to build microwave photonics systems based on ultra-high Q whispering gallery mode resonators are presented. The protocols to obtain and characterize these resonators are detailed, and an explanation of some of their applications in microwave photonics is given.