Automated cancellation of harmonics using feed-forward filter reflection for radar transmitter linearization

Kyle A. Gallagher, Gregory J. Mazzaro, Ram Mohan Narayanan, Kelly D. Sherbondy, Anthony F. Martone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations


Microwave power amplifiers often operate in the nonlinear region to maximize efficiency. However, such operation inevitably produces significant harmonics at the output, thereby degrading the performance of the microwave systems. An automated method for canceling harmonics generated by a power amplifier is presented in this paper. Automated tuning is demonstrated over 400 MHz of bandwidth with a minimum cancellation of 110 dB. The intended application for the harmonic cancellation is to create a linear radar transmitter for the remote detection of non-linear targets. The signal emitted from the non-linear targets is often very weak. High transmitter linearization is required to prevent the harmonics generated by the radar itself from masking this weak signal...

Original languageEnglish (US)
Title of host publicationRadar Sensor Technology XVIII
ISBN (Print)9781628410143
StatePublished - 2014
EventRadar Sensor Technology XVIII - Baltimore, MD, United States
Duration: May 5 2014May 7 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherRadar Sensor Technology XVIII
Country/TerritoryUnited States
CityBaltimore, MD

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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