Compact Front-end Prototype for Next Generation RFI-rejecting Polarimetric L-band Radiometer

Brian Sveistrup Jensen; Sten Schmidl Søbjærg; Niels Skou; Viktor Krozer

doi:10.1109/EUMC.2009.5296530

Compact Front-end Prototype for Next Generation RFI-rejecting Polarimetric L-band Radiometer

Brian Sveistrup Jensen, Sten Schmidl Søbjærg, Niels Skou, Viktor Krozer

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Abstract

Realizing the need for lower noise figure and smaller physical size in todays higly sensitive radiometers, this paper presents a new compact analog front-end (AFE) for use with the existing L-band (1400-1427 MHz) radiometer designed and operated by the Technical University of Denmark. Using subharmonic sampling to sample directly at the RF-frequency, this radiometer obtains a fully polarimetric response and enables detection and removal of radio frequency interference (RFI). A more compact AFE will enable various desired features, as for example the ability to use the front-end with antenna arrays needing one receiver per antenna (Synthetic Aperture Radiometer, SARad), reduced weight for airborne missions and an easy temperature stabilization, i.e. improved instrument stability. The new front-end possesses an improved system noise temperature of only 76 K (roughly 40 K improvement) measured at an AFE physical temperature of 44oC, thus making the radiometer even more sensitive.

Original language	English
Title of host publication	Proceedings of the 39th European Microwave Conference
Number of pages	4
Publisher	IEEE
Publication date	2009
ISBN (Print)	978-1-4244-4748-0
DOIs	https://doi.org/10.1109/EUMC.2009.5296530
Publication status	Published - 2009
Event	39th European Microwave Conference - Rome, Italy Duration: 28 Sept 2009 → 2 Oct 2009 Conference number: 39 http://www.eumweek.com/2009/EuMC.asp?id=c

Conference

Conference	39th European Microwave Conference
Number	39
Country/Territory	Italy
City	Rome
Period	28/09/2009 → 02/10/2009
Internet address	http://www.eumweek.com/2009/EuMC.asp?id=c

Bibliographical note

Copyright: 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

Keywords

Radio Frequency Interference
Microwave radiometry
Sub-harmonic sampling
EMIRAD
Calibration
Polarimetry
Microwave receivers

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MC091392Final published version, 791 KB

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title = "Compact Front-end Prototype for Next Generation RFI-rejecting Polarimetric L-band Radiometer",

abstract = "Realizing the need for lower noise figure and smaller physical size in todays higly sensitive radiometers, this paper presents a new compact analog front-end (AFE) for use with the existing L-band (1400-1427 MHz) radiometer designed and operated by the Technical University of Denmark. Using subharmonic sampling to sample directly at the RF-frequency, this radiometer obtains a fully polarimetric response and enables detection and removal of radio frequency interference (RFI). A more compact AFE will enable various desired features, as for example the ability to use the front-end with antenna arrays needing one receiver per antenna (Synthetic Aperture Radiometer, SARad), reduced weight for airborne missions and an easy temperature stabilization, i.e. improved instrument stability. The new front-end possesses an improved system noise temperature of only 76 K (roughly 40 K improvement) measured at an AFE physical temperature of 44oC, thus making the radiometer even more sensitive.",

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author = "Jensen, {Brian Sveistrup} and S{\o}bj{\ae}rg, {Sten Schmidl} and Niels Skou and Viktor Krozer",

note = "Copyright: 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 39th European Microwave Conference, EuMC 2009 ; Conference date: 28-09-2009 Through 02-10-2009",

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AU - Krozer, Viktor

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N2 - Realizing the need for lower noise figure and smaller physical size in todays higly sensitive radiometers, this paper presents a new compact analog front-end (AFE) for use with the existing L-band (1400-1427 MHz) radiometer designed and operated by the Technical University of Denmark. Using subharmonic sampling to sample directly at the RF-frequency, this radiometer obtains a fully polarimetric response and enables detection and removal of radio frequency interference (RFI). A more compact AFE will enable various desired features, as for example the ability to use the front-end with antenna arrays needing one receiver per antenna (Synthetic Aperture Radiometer, SARad), reduced weight for airborne missions and an easy temperature stabilization, i.e. improved instrument stability. The new front-end possesses an improved system noise temperature of only 76 K (roughly 40 K improvement) measured at an AFE physical temperature of 44oC, thus making the radiometer even more sensitive.

AB - Realizing the need for lower noise figure and smaller physical size in todays higly sensitive radiometers, this paper presents a new compact analog front-end (AFE) for use with the existing L-band (1400-1427 MHz) radiometer designed and operated by the Technical University of Denmark. Using subharmonic sampling to sample directly at the RF-frequency, this radiometer obtains a fully polarimetric response and enables detection and removal of radio frequency interference (RFI). A more compact AFE will enable various desired features, as for example the ability to use the front-end with antenna arrays needing one receiver per antenna (Synthetic Aperture Radiometer, SARad), reduced weight for airborne missions and an easy temperature stabilization, i.e. improved instrument stability. The new front-end possesses an improved system noise temperature of only 76 K (roughly 40 K improvement) measured at an AFE physical temperature of 44oC, thus making the radiometer even more sensitive.

KW - Radio Frequency Interference

KW - Microwave radiometry

KW - Sub-harmonic sampling

KW - EMIRAD

KW - Calibration

KW - Polarimetry

KW - Microwave receivers

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DO - 10.1109/EUMC.2009.5296530

M3 - Article in proceedings

SN - 978-1-4244-4748-0

BT - Proceedings of the 39th European Microwave Conference

PB - IEEE

T2 - 39th European Microwave Conference

Y2 - 28 September 2009 through 2 October 2009

ER -

Compact Front-end Prototype for Next Generation RFI-rejecting Polarimetric L-band Radiometer

Abstract

Conference

Bibliographical note

Keywords

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