A 55nm CMOS 4-in-1 (11b/g/n, BT, FM, and GPS) radio-in-a-package with IPD front-end components directly connected to antenna

This paper presents a 55nm 4-in-1 (11b/g/n, BT, FM, and GPS) radio assembled side-by-side with a 3-metal layer integrated-passive-device (IPD) chip in a QFN40 package. One 2.4GHz transceiver is area-efficiently shared between WiFi and Bluetooth systems. Including a 3dB IPD insertion loss, at chip output (antenna port) the saturated output power of the 11bgn integrated PA is 25dBm; the receiver noise figure is 6dB and 7dB in WiFi and BT modes, respectively. The shared synthesizer locks to within 4ppm target frequency during WiFi/BT channel switching in less than 23 usec. Tracking sensitivity of the GPS receiver and the sensitivity of the FM receiver (including IPD loss) are -162dBm and 2.7dBuVrms, respectively. The IPD chip contains a 2.4GHz WiFi/BT balanced tri-section filter and matching network; a 2.4GHz/1.6GHz diplexer; and a GPS 5th order elliptical filter and its matching network. The radio and IPD die sizes are 3.4mm² and 3.1mm², respectively.