Microwave photonics (MWP) has adopted a number of important concepts and technologies over the recent pasts, including photonic integration, versatile programmability, and techniques for enhancing key radio frequency performance metrics such as the noise figure and the dynamic range. However, to date, these aspects have not been achieved simultaneously in a single circuit. Here, we demonstrate, for the first time, a multi-functional integrated microwave photonic circuit that enables on-chip programmable filtering functions while achieving record-high of >120 dB.Hz dynamic range and 15 dB of noise figure that are previously unreachable. We achieve this unique feature using versatile complex spectrum tailoring enabled by an all integrated modulation transformer and a double injection ring resonator as a multi-function optical filtering component. This work breaks the conventional and fragmented approach of integration, functionality and performance that currently prevents the adoption of integrated MWP systems in real applications.

Low imbalanced and fully matched active baluns have been designed for 21GHz up-conversion Gilbert mixer's ports. It consists of a common-gate FET and a common-source FET with input and output matching networks. The balun has been realized in 0.25μm GaAs pHEMT process. Simulation shows that the phase error of LO balun could be controlled within 2 degrees over the frequency of 3-6GHz, and the phase error of IF balun could be controlled within 3 degrees over the frequency of 16-18GHz.All ports are matched at the impendence of 50Ω for mixer use. The inhibition of the Gilbert mixer using proposed active baluns is more than 40dBc.