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

9 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

Cite this

Huang, C., Buisman, K., Nanver, L. K., Sarubbi, F., Popadić, M., Scholtes, T. L. M., ... De Vreede, L. C. N. (2008). A 67 dBm OIP3 multistacked junction varactor. IEEE microwave and wireless components letters, 18(11), 749-751. [4666741]. https://doi.org/10.1109/LMWC.2008.2005234