Harmonic generation using nonlinear LC lattices

Georgios N. Lilis, Jihyuk Park, Wooram Lee, Guansheng Li, Harish S. Bhat, Ehsan Afshari

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Nonlinear LC lattices have shown promise for highpower high-frequency signal generation. Here we offer the first detailed study of the frequency response of these lattices, as well as a method designed to find input excitation frequencies that result in intense harmonic generation. The crux of the method is to locate regions in frequency space where the spectral norm of the lattice response matrix is large. When the fundamental excitation frequency (or one of its multiples) is located in these regions, the lattice harmonic response is intensified. These findings are supported by extensive numerical simulations and experimental measurements. We deal chiefly with a first-order dependency of capacitance (C) on voltage (V); however, it is also shown that lattices with higher order C-V dependencies achieve proportionally higher harmonic generation. Simulations using a 0.13-μm CMOS process indicate harmonic generation at 400 GHz (three times the cutoff frequency of the fastest active device in this process), suggesting potential applications of this lattice topology in terahertz range devices.

Original languageEnglish (US)
Article number5471045
Pages (from-to)1713-1723
Number of pages11
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number7 PART 1
StatePublished - Jul 2010

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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