A CMOS direct-conversion transceiver for IEEE 802.11a/b/g WLANs

This paper presents a single chip dual-band transceiver, fully compliant with the IEEE 802.11 a/b/g standards. Operating in the frequency ranges of 2.412-2.484 GHz and 4.92-5.805 GHz (including the Japanese band), the fractional-N PLL based frequency synthesizer achieves an integrated (10 kHz-10 MHz) phase noise of 0.54/spl deg//1.1/spl deg/ for 2/5-GHz band. The transmitter error-vector-magnitude (EVM) is -36/-33 dB with an output power level higher than -3/-5 dBm and the receiver sensitivity is better than -70 dBm for 2/5-GHz band for 64QAM at 54 Mb/s.