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 contribution||Amplitude offset estimation by phase comparison in suppression loops|
|Pages (from-to)||1742 - 1747|
|Number of pages||6|
|Journal||IEEE Transactions on Microwave Theory and Techniques|
|Publication status||Published - Jul 2010|
Bibliographical notePublisher: IEEE
Rose publication type: Journal article
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- amplitude estimation
- measurement errors
- phase measurement