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Cascaded distributed power amplifier with non-identical transistors and inter-stage tapered impedance

Research output: Contribution in Book/Report/ProceedingsConference contribution


  • K. Narendra
  • E. Limiti
  • C. Paoloni
  • J.-M. Collantes
  • R.H. Jansen
Publication date1/09/2010
Host publicationMicrowave Conference (EuMC), 2010 European
Pages990 -993
Number of pages4
ISBN (Print)978-1-4244-7232-1
<mark>Original language</mark>English


A concept technique of cascaded distributed power amplifier (DPA) with non-identical transistors and controlled inter-stage tapered impedance for wideband applications is presented. The topology solves the gain peaking effect (expansion) at cut-off frequency and guarantees sufficient stability margins. The advantages of the proposed technique are explored analytically before prototype fabrication. At measurement level, 10 W output power, 32 dB gain and PAE (power-aided-efficiency) in excess of 15% are recorded from 70-2000 MHz. A good agreement between simulations and measurements was obtained.