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A frequency synthesizer for the ultra-wide band(UWB) group #1 is proposed.The synthesizer uses a phaselocked loop(PLL) and single-sideband(SSB) mixers to generate the three center frequencies of the first band group by mixing 4224 MHz with±264 MHz and 792 MHz,respectively.A novel multi-QSSB mixer is designed to combine the function of frequency selection and frequency conversion for low power and high linearity.The synthesizer is fabricated in Jazz 0.18-μm RF CMOS technology.The measured reference spur is as low as-69 dBc and the maximum spur is the LO leakage of-32 dBc.A low phase noise of—110 dBc/Hz @ 1 MHz offset and an integrated phase noise of 1.86°are achieved.The hopping time between different bands is less than 1.8 ns.The synthesizer consumes 30 mA from a 1.8V supply.
A frequency synthesizer for the ultra-wide band (UWB) group # 1 is proposed. The synthesizer uses a phaselocked loop (PLL) and single-sideband (SSB) mixers to generate the three center frequencies of the first band group by mixing 4224 MHz with ± 264 MHz and 792 MHz, respectively. A novel multi-QSSB mixer is designed to combine the function of frequency selection and frequency conversion for low power and high linearity. The synthesizer is fabricated in Jazz 0.18-μm RF CMOS technology. reference spur is as low as-69 dBc and the maximum spur is the LO leakage of -32 dBc. A low phase noise of-110 dBc / Hz @ 1 MHz offset and an integrated phase noise of 1.86 ° are achieved. The hopping time between different bands is less than 1.8 ns.The synthesizer consumes 30 mA from a 1.8V supply.