A 67 dBm OIP3 multistacked junction varactor

Cong Huang*, Koen Buisman, Lis K. Nanver, Francesco Sarubbi, Miloš Popadić, Tom L.M. Scholtes, Hugo Schellevis, Lawrence E. Larson, Leo C.N. De Vreede

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)


A multistacked varactor is presented for ultra-linear tunable radio frequency applications. The varactor elements are applied in anti-series configuration and are characterized by an "exponential" C-V R relationship. Third-order intermodulation (IM3) is cancelled through proper harmonic loading of the terminals of the anti-series configuration. Multiple stacking is used to further increase the power handling and to minimize the remaining fifth-order distortion. The measured output intercept point (OIP3) at 2 GHz is > 67 dBm for modulated signals up to 10 MHz bandwidth, while providing a capacitance tuning ratio of 3:1 with an average quality factor of 40 and maximum control voltage of 10 V.

Original languageEnglish
Article number4666741
Pages (from-to)749-751
Number of pages3
JournalIEEE microwave and wireless components letters
Issue number11
Publication statusPublished - 1 Nov 2008
Externally publishedYes


  • Adaptive systems
  • Band-switching
  • Impedance matching
  • Low-distortion
  • Tunable filters
  • Tuners
  • Varactors


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