A highly integrated low-power 2.4GHz transceiver using a direct-conversion diversity receiver in 0.18µm CMOS for IEEE802.15.4 WPAN. - Guido Retz; Hyman Shanan; Kenneth Mulvaney; Kenneth O'Mahony; Miguel Chanca; Pat Crowley; Charley Billon; Muhammad Kalimuddin Khan; Philip Quinlan (ISSCC, 2009)