A Wideband Flexible Power Upconverter for Software Defined Radios

R. Shrestha, Eric A.M. Klumperink, E. Mensink, Gerhardus J.M. Wienk, Bram Nauta

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


    Abstract— In a multi-standard radio transmitter it is common practice to use multiple narrowband PA’s and filters: one for each standard and a switch before them. With the ever increasing number of different standards to be supported, this architecture becomes increasingly unpractical, as support for every new frequency band requires adding a dedicated external filter. Use of these discrete filters reduces the level of integration, thus making it difficult to realize low cost multi-radios on a single RF chip. This paper presents a polyphase multipath technique to relax or eliminate filters by canceling harmonics and sidebands. Using this technique, a wideband and flexible power upconverter with a clean output spectrum is designed in a 0.13μm CMOS for a software defined radio application. Additionally, a 33% duty cycle is used to cancel the problematic 3rd harmonic of the LO. The demonstrator prototype of the proposed power upconverter operates from DC to 2.4GHz with spurs <-40dBc over more than a decade in frequency. It can deliver 8dBm of power to a 100Ω load and consumes 228mW from a 1.2V supply. It uses no filters but only digital circuits and mixers, and no tuning of components is required.
    Original languageUndefined
    Title of host publication17th Annual Workshop on Circuits Systems and Signal Processing (ProRISC)
    Place of PublicationVeldhoven
    Number of pages5
    ISBN (Print)978-90-73461-44-4
    Publication statusPublished - 23 Nov 2006
    Event17th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2006 - Veldhoven, Netherlands
    Duration: 23 Nov 200624 Nov 2006
    Conference number: 17

    Publication series

    PublisherTechnology Foundation STW


    Workshop17th Annual Workshop on Circuits, Systems and Signal Processing, ProRISC 2006
    Abbreviated titleProRISC 2006


    • EWI-9139
    • METIS-237936
    • IR-63932

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