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Switched-mode power amplifier integrally performing power combining

  • US 6,937,096 B2
  • Filed: 06/30/2003
  • Issued: 08/30/2005
  • Est. Priority Date: 12/03/2001
  • Status: Expired
First Claim
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1. A switched-mode power amplifier configured for integrally amplifying and combining a plurality of analog phase modulated signals input thereto, said amplifier comprising:

  • (a) an input component for each of said plurality of analog phase modulated input signals wherein each said input component comprises at least one active device configured to be alternately switched by-said by an analog phase modulated input signal to present an amplified signal corresponding to said analog phase modulated input signal, said amplified signal constituting a low output impedance voltage source;

    (b) an output resonator component; and

    , (c) an impedance inverter between each said input component and said resonator component, said impedance inverter configured for transforming said low output impedance voltage source to a high output impedance current source, wherein said high output impedance sources are combined in parallel before being passed to said resonator component;

    wherein said impedance inverter comprises a lumped element equivalent component to a quarter-wavelength transmission line;

    wherein said lumped element equivalent component comprises two or more of a series inductor, a series negative inductor, a shunt-to-ground inductor, a shunt-to-ground negative inductor, a series capacitor, a series negative capacitor, a shunt-to-ground capacitor, and a shunt-to-ground negative capacitor.

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