Future radar transmitters will need to be able to quickly reconfigure their radio-frequency circuitry to change operating frequency and spectral output while maintaining high power-added efficiency (PAE). In this paper, fast tuning of a tunable-varactor matching network is demonstrated to optimize the PAE while meeting requirements on the adjacent-channel power ratio. The tunable varactor network, a first-level prototype of a tunable radar amplifier matching network, incurs nonlinear performance, providing possible challenges to measurement accuracy. To address the issue of nonlinearities while maintaining ability to quickly reconfigure, the tunable-varactor network is characterized at different input power levels to allow useful performance in its nonlinear regime. The power-dependent characterization is used in an algorithm for optimization of an amplifier's PAE, by looking up the matching network characterization performed at the power estimated to be output by the amplifier. Measurement results show that this characterization enhances the consistency of the optimized PAE. Using the tunable varactor network reduces the optimization time to one-fourth of the time required when using the algorithm with a traditional mechanical load-pull tuner.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Real-Time Amplifier Load-Impedance Optimization for Adaptive Radar Transmitters Using a Nonlinear Tunable Varactor Matching Network


    Beteiligte:
    Rezayat, Sarvin (Autor:in) / Kappelmann, Christopher (Autor:in) / Hays, Zachary (Autor:in) / Lamers, Lucilia (Autor:in) / Fellows, Matthew (Autor:in) / Baylis, Charles (Autor:in) / Viveiros, Ed (Autor:in) / Hedden, Abigail (Autor:in) / Penn, John (Autor:in) / Marks, Robert J. (Autor:in)


    Erscheinungsdatum :

    01.02.2019


    Format / Umfang :

    5904627 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Optimization of power-amplifier load impedance and waveform bandwidth for real-time reconfigurable radar

    Fellows, Matthew / Flachsbart, Matthew / Barlow, Jennifer et al. | IEEE | 2015


    TUNABLE SWITCHED IMPEDANCE MATCHING NETWORK

    ELSHAER MOHAMED / RICHARD WILLIAM KAUTZ / CHEN CHINGCHI et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    TUNABLE SWITCHED IMPEDANCE MATCHING NETWORK

    ELSHAER MOHAMED / KAUTZ RICHARD WILLIAM / CHEN CHINGCHI et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Tunable switched impedance matching network

    ELSHAER MOHAMED / KAUTZ RICHARD WILLIAM / CHEN CHINGCHI et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Real-time load impedance optimization for radar spectral mask compliance and power efficiency

    Fellows, Matthew / Baylis, Charles / Cohen, Lawrence et al. | IEEE | 2015