A dual channel satellite radio receiver that solves the deep fading effect specific to the automotive mobile environment by using antenna diversity was realized in a 0.18 mu m SiGe BiCMOS technology. The tuner power dissipation was reduced by using a second-zero-IF dual conversion architecture that requires a lower ADC sampling frequency and resolution. A single PLL drives the RF and IF mixers of both signal paths, resulting in a smaller die area and lower power dissipation. Providing a digital baseband I/Q output allows the implementation of the channel decode IC in a standard digital CMOS process, reducing the overall receiver cost. SDARS tuner performance includes: 5dB noise figure, 55dB image rejection, -100dBm input sensitivity, +15dBm IIP3 at min gain, 40/60dB RF/IF AGC range, 200mA current consumption from a 3.3V supply in dual channel operation and 26mm(2) die area.