Amplitude Offset Estimation by Phase Comparison in Suppression Loops

Author

Warr, Paul A. ; Bissonauth, Nirmal

Author_Institution

Centre for Commun. Res., Univ. of Bristol, Bristol, UK

Volume

58

Issue

7

fYear

2010

fDate

7/1/2010 12:00:00 AM

Firstpage

1742

Lastpage

1747

Abstract

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.

Keywords

amplitude estimation; comparators (circuits); passive networks; phase estimation; RF amplitude comparator circuit; amplitude offset estimation; amplitude offset measurements; amplitude ratio; calibrated vector signal analyzer; cospectral RF signals; frequency 1600 MHz to 2100 MHz; passive RF components; phase offset estimation; suppression loops; Amplitude estimation; measurement errors; phase measurement;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2010.2049679

Filename

5471046