Amplitude offset estimation by phase comparison in suppression loops

PA Warr, N Bissonauth

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)
388 Downloads (Pure)


In this paper, a new architecture for an RF amplitude comparator circuit is introduced. The technique employs a trigonometric relationship enacted by passive RF components to map the amplitude ratio between two co-spectral RF signals into a phase difference. The theory of operation of the circuit is discussed in detail and the results of a practical investigation are presented, validating the approach. The results demonstrate an accuracy advantage over commercially available products. Over the frequency range of 1600–2100 MHz, amplitude offset measurements to within 0.08 dB of that of a calibrated vector signal analyzer are shown.
Translated title of the contributionAmplitude offset estimation by phase comparison in suppression loops
Original languageEnglish
Pages (from-to)1742 - 1747
Number of pages6
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number7
Publication statusPublished - Jul 2010

Bibliographical note

Publisher: IEEE
Rose publication type: Journal article

Terms of use: Copyright © July 2010 IEEE. Reprinted from IEEE Transactionson Microwave Theory and Techniques.

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  • amplitude estimation
  • measurement errors
  • phase measurement

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