This talk summarizes the recent work on phased arrays starting from the lower frequency chips at 6-12 GHz, and passing by the satellite communication chips at 6-22 GHz, and ending by the short-range communication chips and car radar chips at 60 GHz and 77-81 GHz. Different topologies will be covered: RF phase shifting, IF phase shifting, LO phase shifting, and and digital beamforming, with the pros and cons for each topology. Also, wafer-scale integration and the use of efficient on-chip antennas at 30 GHz and above will be presented. Phased-array systems from industry and academia will be covered in detail.