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A fully integrated 2Ã1 dual-band direct-conversion transceiver for a mobile WiMAX SoC in a 65 nm CMOS technology is presented. Inductorless LO distribution by compact dual-mode fractional dividers is introduced. Total NF of 3.8 dB is achieved by a noise-shaping transimpedance amplifier. It consumes 214.8 mW for 1 TX at +1 dBm and 214.1 mW for 2 RX, and occupies 2.3Ã6.72 mm2.