RF/IF Chip Set for Wireless LAN Application

摘要

Toshiba has developed a radio frequency/intermediate frequency (RF/IF) chip set for 5 GHz-band wireless LAN application. The functionality of the RF chip consists of down- and up-conversion between an RF signal and IF signal, while that of the IF chip is demodulation and modulation between an IF signal and baseband I/Q signal. Excellent high-frequency performance was achieved by using f_T = 45 GHz SiGe-BiCMOS technology for the RF chip and Si-bipolar technology for the IF chip. An error vector magnitude (EVM) of -32.4 dB was obtained with 41 mA and 60 mA current consumption for receiving (RX) and transmitting (TX), respectively. This result is excellent for a 5 GHz wireless LAN chip set.