2.4-2.5 GHz Fractional-N Frequency Synthesizer with Integrated VCO in 0.18 um CMOS for RFID Systems

Paper presents simulation and measurement results of 2.4-2.5 GHz fractional-N frequency synthesizer with integrated voltage controlled oscillator, designed in a standard 0.18 um CMOS technology process, for RFID systems. Phase noise of the designed synthesizer is below -117 dBc/Hz at 1 MHz offset. The output power is -2 dBm, while spur level is below - 79 dBc. Chip area, occupied by the designed circuit, is 1.2 sq. mm.