Multitone fast frequency-hopping synthesizer for UWB radio

Kari Stadius*, Tapio Rapinoja, Jouni Kaukovuori, Jussi Ryynänen, Kari A I Halonen

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    24 Citations (Scopus)


    A fast frequency-hopping six-band local oscillator signal generator is described in this paper. Targeted for a Wi-Media ultra-wideband radio transceiver, it offers operation in mandatory band group 1 and in extensional band group 3. The circuit entity consists of three parallel phase-locked loops (PLLs), each including two voltage-controlled oscillators, one per band group, and a signal multiplexer for fast frequency selection. A broadband poly-phase RC filter is used for in-phase/quadrature generation. Furthermore, the synthesizer generates the clock signal for analog-to-digital converters by mixing the signals from the first and third PLL. The circuit was fabricated in a 0.13- μm CMOS process and it consumes 32 mA from a 1.2-V supply. It achieves 2-ns frequency settling time with a 3-MHz hopping rate.

    Original languageEnglish
    Pages (from-to)1633-1640
    Number of pages8
    JournalIEEE Transactions on Microwave Theory and Techniques
    Issue number8
    Publication statusPublished - Aug 2007
    MoE publication typeA1 Journal article-refereed


    • Frequency synthesizer
    • Phase-locked loop (PLL)
    • Ultra-wideband (UWB)


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