High-frequency microwave signal generation and processing are highly needed in future multi-functional radar and nextgeneration wireless communication systems. It is extremely difficult or impossible for electronics to fulfil the tasks. As an enabling technology, photonics has been considered a promising solution for the generation and processing of highfrequency microwave signals. In this paper, photonic integrated solutions for microwave signal generation and processing will be discussed. Specifically, a monolithically integrated silicon-photonic frequency-tunable microwave bandpass filter and a frequency-tunable low phase-noise optoelectronic oscillator are discussed. This successful demonstration of the two integrated microwave photonic systems marks a significant step forward for large-scale implementation of integrated microwave photonic systems for future radar and wireless communication applications.