A SiGe wideband VCO and divider MMIC with low gain variation for multi-band systems at 2.4 and 5.8 GHz

Scalable indoor positioning system with multi‐band FMCW

“…The PLL is followed by a totem pole driver stage [11] providing an output power level of −0.5 and −4 dBm at 2.4 and 5.8 GHz, respectively, to drive an external power amplifier (PA) [12]. At the heart of the PLL, a wide tuning range voltage‐controlled oscillator (VCO) following the design in [13] with a single varactor is used to allow for continuous chirp generation with a single tuning curve. Moreover, a wide compliance range charge pump following the design in [14] is used to exploit the full tuning range of the varactor.…”