A frequency tunable amplifier for DCS-1800, PCS-1900, DECT and UMTS


NESİMOĞLU T.

2010 10th Mediterranean Microwave Symposium, MMS 2010, Guzelyurt, Cyprus (Gkry), 25 - 27 August 2010, pp.299-302 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/mmw.2010.5605171
  • City: Guzelyurt
  • Country: Cyprus (Gkry)
  • Page Numbers: pp.299-302
  • Keywords: Reconfigurable radio, Software defined radio (SDR), Tunable amplifier, Tunable RF components
  • Middle East Technical University Affiliated: Yes

Abstract

The trade-off between efficiency and tunability has been revealed in frequency-tunable amplifiers. Several tunable amplifiers have been designed using various varactor diode topologies and their performances are compared. Simulation results demonstrate that the tunable amplifiers using anti-series distortion-free varactor stack (DFVS) topologies provide superior tunability and power added efficiency (PAE) than those using conventional varactor diode topologies. A tunable amplifier is designed that can tune from 1.74-to-2.36 GHz and provide 42% PAE. This range of tunability is sufficient to accommodate DCS-1800, PCS-1900, DECT and UMTS standards, and thus it may help to reduce the complexity of multimode and reconfigurable radios. © 2010 IEEE.