SEMICONDUCTOR INTEGRATED CIRCUITS

A low-spurious fast-hopping MB-OFDM UWB synthesizer

Chen Danfeng, Li Wei, Li Ning and Ren Junyan

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Abstract: 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 1.8 V supply.

Key words: frequency synthesizer

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    Received: 18 August 2015 Revised: 25 December 2009 Online: Published: 01 June 2010

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      Chen Danfeng, Li Wei, Li Ning, Ren Junyan. A low-spurious fast-hopping MB-OFDM UWB synthesizer[J]. Journal of Semiconductors, 2010, 31(6): 065003. doi: 10.1088/1674-4926/31/6/065003 Chen D F, Li W, Li N, Ren J Y. A low-spurious fast-hopping MB-OFDM UWB synthesizer[J]. J. Semicond., 2010, 31(6): 065003. doi: 10.1088/1674-4926/31/6/065003.Export: BibTex EndNote
      Citation:
      Chen Danfeng, Li Wei, Li Ning, Ren Junyan. A low-spurious fast-hopping MB-OFDM UWB synthesizer[J]. Journal of Semiconductors, 2010, 31(6): 065003. doi: 10.1088/1674-4926/31/6/065003

      Chen D F, Li W, Li N, Ren J Y. A low-spurious fast-hopping MB-OFDM UWB synthesizer[J]. J. Semicond., 2010, 31(6): 065003. doi: 10.1088/1674-4926/31/6/065003.
      Export: BibTex EndNote

      A low-spurious fast-hopping MB-OFDM UWB synthesizer

      doi: 10.1088/1674-4926/31/6/065003
      • Received Date: 2015-08-18
      • Accepted Date: 2009-12-25
      • Revised Date: 2009-12-25
      • Published Date: 2010-06-03

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