Comparison of analog continuum correlators for remote sensing and radio astronomy

Author

Koistinen, Olli ; Lahtinen, Janne ; Hallikainen, Martti T.

Author_Institution

Metsahovi Radio Observatory, Helsinki Univ. of Technology., Espoo, Finland

Volume

51

Issue

2

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

227

Lastpage

234

Abstract

Two different designs of analog correlators for radiometry are compared in this paper. A continuum correlator based on a microwave nonlinear device is a simple and inexpensive way to detect wide-band polarized signals. Analysis and extensive measurements including linearity, dynamic range, amplitude response, phase balance, and stability are presented, and the suitability of the designs for microwave radiometry is discussed. Both correlators showed nearly ideal performance. A novel method for determining the correlator degradation factor is applied

Keywords

analogue processing circuits; correlators; microwave receivers; polarimetry; radioastronomical techniques; radiometry; remote sensing; signal processing equipment; stability; Ka-band microwave receivers; amplitude response; analog correlators; complex cross-correlation; continuum correlator; correlator degradation factor; dynamic range; linearity; microwave nonlinear device; microwave radiometry; mixer correlator; multiplier correlator; phase balance; polarimetric radiometry; radioastronomy; remote sensing; stability; wide-band polarized signals; Correlators; Linearity; Microwave devices; Microwave measurements; Microwave radiometry; Phase measurement; Polarization; Remote sensing; Signal detection; Wideband;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.997817

Filename

997817