Title :
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
fDate :
4/1/2002 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
