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

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

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)


© 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
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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