A miniaturized wilkinson power divider with CMOS active inductors

Liang Hung Lu*, Yu-Te Liao, Chung Ru Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

A miniaturized Wilkinson power divider implemented in a standard 0.18-μm CMOS process is presented in this letter. By using active inductors for the circuit implementation, a significant area reduction can be achieved due to the absence of distributed components and spiral inductors. The power divider is designed at a center frequency of 4.5 GHz for equal power dividing with all ports matched to 50 Ω. Drawing a dc current of 9.3 mA from a 1.8-V supply voltage, the fabricated circuit exhibits an insertion loss less than 0.16 dB and a return loss better than 30 dB at the center frequency while maintaining good isolation between the output ports. The active area of the miniaturized Wilkinson power divider is 150 × 100 μm 2, which is suitable for system integration in monolithic microwave integrated circuit (MMIC) applications.

Original languageEnglish
Pages (from-to)775-777
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume15
Issue number11
DOIs
StatePublished - Nov 2005

Keywords

  • Active inductors
  • Lumped power divider
  • Monolithic microwave integrated circuit (MMIC)
  • Regulated cascode
  • Wilkinson power dividers
  • miniaturization

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