Calibration of a Polarimetric Microwave Radiometer Using a Double Directional Coupler

This paper presents a built-in calibration procedure of a 10-to-20 GHz polarimeter aimed at measuring the I, Q, U Stokes parameters of cosmic microwave background (CMB) radiation. A full-band square waveguide double directional coupler, mounted in the antenna-feed system, is used to inject different...

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Published in:Remote sensing (Basel, Switzerland) Switzerland), 2021-06, Vol.13 (11), p.2109
Main Authors: de la Fuente, Luisa, Aja, Beatriz, Villa, Enrique, Artal, Eduardo
Format: Article
Language:English
Subjects:
Antenna feeds
Calibration
Cosmic microwave background
cosmic microwave background receiver
Directional couplers
Electric fields
Experiments
Feed systems
Gravitational waves
Linear polarization
microwave polarimeter
Microwave radiation
Noise
Observatories
polarimeter calibration
Polarimeters
Polarimetry
Radar
Radiation
Radio astronomy
radio astronomy receiver
radiometer
radiometer calibration
Radiometers
Receivers & amplifiers
Remote sensing
Sensors
Stokes parameters
Waveguides
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cited_by cdi_FETCH-LOGICAL-c361t-62acf6b9072fb51eb956d9f144c7b29c8ed7872a94c95732db95f2c380021ff53
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container_issue 11
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container_title Remote sensing (Basel, Switzerland)
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creator de la Fuente, Luisa
Aja, Beatriz
Villa, Enrique
Artal, Eduardo
description This paper presents a built-in calibration procedure of a 10-to-20 GHz polarimeter aimed at measuring the I, Q, U Stokes parameters of cosmic microwave background (CMB) radiation. A full-band square waveguide double directional coupler, mounted in the antenna-feed system, is used to inject differently polarized reference waves. A brief description of the polarimetric microwave radiometer and the system calibration injector is also reported. A fully polarimetric calibration is also possible using the designed double directional coupler, although the presented calibration method in this paper is proposed to obtain three of the four Stokes parameters with the introduced microwave receiver, since V parameter is expected to be zero for the CMB radiation. Experimental results are presented for linearly polarized input waves in order to validate the built-in calibration system.
doi_str_mv 10.3390/rs13112109
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subjects Antenna feeds
Calibration
Cosmic microwave background
cosmic microwave background receiver
Directional couplers
Electric fields
Experiments
Feed systems
Gravitational waves
Linear polarization
microwave polarimeter
Microwave radiation
Noise
Observatories
polarimeter calibration
Polarimeters
Polarimetry
Radar
Radiation
Radio astronomy
radio astronomy receiver
radiometer
radiometer calibration
Radiometers
Receivers & amplifiers
Remote sensing
Sensors
Stokes parameters
Waveguides
title Calibration of a Polarimetric Microwave Radiometer Using a Double Directional Coupler
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