Feed-Forward Technique to Measure the Reflection Coefficient under CW High-Power Signals

Carlos Collado, Marta Gonzalez-Rodriguez, Jose M. Gonzalez-Arbesu, Jordi Mateu, Jordi Verdu, Alberto Hueltes

Research output: Contribution to journalArticleResearch


© 1963-2012 IEEE. This paper describes a measurement setup to obtain the reflection coefficient response over the frequency of a given device when this is subjected to a single-tone high-power (HP) signal. The proposed system is based on a feed-forward technique to cancel the reflected HP signal before reaching the vector network analyzer. This allows measuring the effects of the HP interfering signal into the device's low-power frequency response. This technique does not require either power-calibrated standards or complex calibration techniques. Experiments in several devices are also reported to validate the suitability of this technique.
Original languageEnglish
Article number8418310
Pages (from-to)4627-4633
JournalIEEE Transactions on Microwave Theory and Techniques
Publication statusPublished - 1 Oct 2018


  • Cancellation system
  • feed forward
  • high power (HP)
  • S-parameters


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