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Improved Radiometric Performance Attained by an Elliptical Microwave Antenna With Suction

O. Klemetsen, S. Jacobsen
2012 IEEE Transactions on Biomedical Engineering  
Total Power Radiometer A total power radiometer is the simplest radiometer type and a block diagram is shown in figure 2. 3.  ...  However, the correlation outputs have a sensitivity that is a factor √ 2 better than the sensitivity for the total power radiometer.  ...  Chapter 6 Papers: Published Paper: Design of Medical Radiometer Front-end for Improved Performance  ... 
doi:10.1109/tbme.2011.2172441 pmid:22020663 fatcat:xqfldh5zibfutgee4gxi73ykxe

Radiometric temperature reading of a hot ellipsoidal object inside the oral cavity by a shielded microwave antenna put flush to the cheek

Øystein Klemetsen, Svein Jacobsen, Yngve Birkelund
2012 Physics in Medicine and Biology  
A new scheme for detection of vesicoureteral reflux (VUR) in children has recently been proposed in the literature.  ...  Both anatomical locations reveal a triple-layered tissue structure consisting of skin-fat-muscle with a total thickness of about 8-10 mm.  ...  Acknowledgments The authors thank professor Brent Snow, University of Utah, Salt Lake City, UT, USA for providing the CT image used in the paper.  ... 
doi:10.1088/0031-9155/57/9/2633 pmid:22504068 fatcat:gjdzgk7vhrenhgfgdkv5dfil3y

Phase correction of VLBI with water vapour radiometry [article]

A.L. Roy, H. Rottmann, U. Teuber, R. Keller
2007 arXiv   pre-print
We demonstrate phase correction of 3 mm VLBI observations using the scanning 18 GHz to 26 GHz water vapour radiometer at Effelsberg and we demonstrate an absolute accuracy of 15 mm in zenith path delay  ...  This accuracy should provide significant improvement in astrometric phase referencing observations.  ...  In total the coherent signal-to-noise ratio improved by a factor of 2.1. Another scan during cloud is shown in Fig 2b.  ... 
arXiv:astro-ph/0703066v1 fatcat:lvle3fogwbfnpm5stiw7th7ufu

MICROWAVE NOISE FIELD BEHAVES LIKE WHITE LIGHT

Jiri Polivka, Pavel Fiala, Jan Machac
2011 Electromagnetic Waves  
White light theory is used to investigate wide-band applications of non-coherent electromagnetic waves in the GHz range represented by noise.  ...  The approaches applied here are based on the present knowledge in the field of white light theory (the THz band), the particle theory of light, and the wave theory of light.  ...  Integrating over df and dΘ we will get the total ir/radiated power which, in white light theory, is the same as the power from (3).  ... 
doi:10.2528/pier10041304 fatcat:bvqoyc7tlnglvpy56avff5uaxi

SI Traceable Solar Spectral Irradiance Measurement Based on a Quantum Benchmark: A Prototype Design

Xiaobing Zheng, Maopeng Xia, Wenchao Zhai, Youbo Hu, Jianjun Li, Yinlin Yuan, Weiwei Pang
2020 Remote Sensing  
Correlated photon pairs generated by spontaneous parametric down-conversion (SPDC) in nonlinear crystals are used to calibrate the absolute responsivity of a solar observing radiometer.  ...  The principle of SPDC calibration and a prototype design of the solar radiometer are introduced.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs12091454 fatcat:66aoe7zowzfvxlgedwppqvwvbi

Vesicoureteral Reflux in Children: A Phantom Study of Microwave Heating and Radiometric Thermometry of Pediatric Bladder

Y. Birkelund, O. Klemetsen, S. K. Jacobsen, K. Arunachalam, P. Maccarini, P. R. Stauffer
2011 IEEE Transactions on Biomedical Engineering  
Cycling between 20 second with 20 Watts power for heating, and 10 seconds without power to allow for undisturbed microwave radiometry measurements, the experimental results show that the target tissue  ...  We have investigated the use of microwave heating and radiometry to safely heat urine inside a pediatric bladder.  ...  Brent Snow at Primary Children's Medical Center in Salt Lake City, Utah, and ThermImage Inc, Salt Lake City, for help, funding and practical support in relation with VUR for pediatric patients.  ... 
doi:10.1109/tbme.2011.2167148 pmid:21900069 pmcid:PMC3281522 fatcat:hjw5q2ogjjcjpksor2lutp2szi

Active Millimeter-Wave Radiometry for Nondestructive Testing/Evaluation of Composites—Glass Fiber Reinforced Polymer

Colin Viegas, Byron Alderman, Peter G. Huggard, Jeff Powell, Kai Parow-Souchon, Muhammad Firdaus, Hairui Liu, Christopher I. Duff, Robin Sloan
2017 IEEE transactions on microwave theory and techniques  
This paper describes a non-destructive, broadband noise mapping method that uses a millimeter-wave radiometer to detect defects in composite materials.  ...  A high sensitivity radiometer is used for imaging the sample. The radiometer consists of a Schottky diode -based frequency tripler and fundamental mixer.  ...  millimeter-wave radiometry 75-110 Noise source/radiometer Far field Present system TABLE II OVERVIEW II OF mm-WAVE SYSTEMS USED FOR VARIOUS NDT/E APPLICATIONS All systems included in the table  ... 
doi:10.1109/tmtt.2016.2625785 fatcat:dvo74ogywzfrlbsrhlucbltize

Estimates of Faraday rotation with passive microwave polarimetry for microwave remote sensing of Earth surfaces

S.H. Yueh
2000 IEEE Transactions on Geoscience and Remote Sensing  
A conceptual design applicable to real-aperture and aperture-synthesis radiometers is described for the measurements of the third Stokes parameter.  ...  yield 1 mm accuracy for the estimate of an ionospheric differential delay at Ku-band.  ...  ACKNOWLEDGMENT The research described in this paper was carried out by the Jet Propulsion.  ... 
doi:10.1109/36.868900 fatcat:xzlt6lpbjfepdgmutewfg5dkge

Non-invasive temperature monitoring during microwave heating applying a miniaturized radiometer [chapter]

Svein Jacobsen
2011 Microwave Heating  
With its non-invasive character and being a totally passive sensing principle, microwave radiometry has the potential to allow thermometry of subcutaneous tissues to a depth of some centimeters.  ...  Furthermore, the phantom structure was topped with a 50×50 mm 2 spiral heating antenna operated at the medical 915 MHz frequency and driven by a 9 W power source.  ... 
doi:10.5772/21574 fatcat:6htsdbldlbh6znspetue4byz2y

Photometry, radiometry and 'the candela': evolution in the classical and quantum world

Joanne C Zwinkels, Erkki Ikonen, Nigel P Fox, Gerhard Ulm, Maria Luisa Rastello
2010 Metrologia  
There is also no consensus on whether a reformulation of the definition of the candela in terms of photon flux will be applicable to the lighting community.  ...  These fields are important to a wide range of applications requiring precise and accurate measurements of electromagnetic radiation and, in particular, the amount of radiant energy (light) that is perceived  ...  Acknowledgments The authors gratefully acknowledge useful comments on this paper by Emma Woolliams (NPL), Peter  ... 
doi:10.1088/0026-1394/47/5/r01 fatcat:la5a5do4jra3fgvyn5gr2o57cm

PHASED-ARRAY NEAR FIELD RADIOMETRY FOR BRAIN INTRACRANIAL APPLICATIONS

A. Oikonomou, Irene S. Karanasiou, Nikolaos K. Uzunoglu
2010 Electromagnetic Waves  
Towards that direction a new near field radiometry imaging system has been theoretically studied, developed and experimentally tested and all of the aforementioned research phases are herein presented.  ...  Combining previous research results, as well as new findings, the capabilities of the constructed system, as well as the possibility of using it as a complementary method for brain imaging are discussed  ...  In radiometry, the equivalent temperature of a receiver is T = 300 K and the power in a receiver's input is Pin = kT BN f (1) where k = 1.38 × 10 −23 J/K is Boltzmann's constant, T = 300 K, B = 9 × 10  ... 
doi:10.2528/pier10073004 fatcat:sf6pwgqtlve2nnqpkye3vyqjx4

A systematic neutron reflectometry study on hydrogen absorption in thin Mg1-xAlx alloy films Special issue on Neutron Scattering in Canada

H. Fritzsche, E. Poirier, J. Haagsma, C. Ophus, E. Luber, C. T. Harrower, D. Mitlin
2010 Canadian journal of physics (Print)  
There is also no consensus on whether a reformulation of the definition of the candela in terms of photon flux will be applicable to the lighting community.  ...  These fields are important to a wide range of applications requiring precise and accurate measurements of electromagnetic radiation and, in particular, the amount of radiant energy (light) that is perceived  ...  Acknowledgments The authors gratefully acknowledge useful comments on this paper by Emma Woolliams (NPL), Peter  ... 
doi:10.1139/p09-085 fatcat:jsft4dnxpzbhvmkjav52l6cism

Numerical 3D modeling of heat transfer in human tissues for microwave radiometry monitoring of brown fat metabolism

Dario B. Rodrigues, Paolo F. Maccarini, Sara Louie, Erin Colebeck, Erdem Topsakal, Pedro J. S. Pereira, Paulo Limão-Vieira, Paul R. Stauffer, Thomas P. Ryan
2013 Energy-based Treatment of Tissue and Assessment VII  
The power absorption patterns calculated in HFSS™ were combined with simulated thermal distributions computed in COMSOL® to predict radiometric signal measured from an ultra-low-noise microwave radiometer  ...  Methods-A multilayer 3D computational model was created in HFSS™ with 1.5 mm skin, 3-10 mm subcutaneous fat, 200 mm muscle and a BAT region (2-6 cm 3 ) located between fat and muscle.  ...  Rodrigues acknowledges the Portuguese Foundation for Science and Technology  ... 
doi:10.1117/12.2004931 pmid:24244831 pmcid:PMC3824263 fatcat:msdd5lrosvdebkemhzrw7ctjjy

Metrology of photoluminescent materials

Joanne C Zwinkels
2010 Metrologia  
There is also no consensus on whether a reformulation of the definition of the candela in terms of photon flux will be applicable to the lighting community.  ...  These fields are important to a wide range of applications requiring precise and accurate measurements of electromagnetic radiation and, in particular, the amount of radiant energy (light) that is perceived  ...  MLR acknowledges the support from the European Community's Seventh Framework Programme, ERA-NET Plus, under Grant Agreement No. 217257. EI acknowledges grant Nr.  ... 
doi:10.1088/0026-1394/47/2/s15 fatcat:zxs6tdiclfdeper6tkel2yyam4

The Flexible Microwave Payload -2: A SDR-based GNSS-Reflectometer and L-band radiometer for CubeSats

Joan Francesc Munoz-Martin, Lara Fernandez, Joan Adria Ruiz-de-Azua, Adriano Camps
2020 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
Index Terms-Cubesats , GNSS-R, L-band, radiometry, RFI, sea ice, soil moisture (SM). Joan Francesc Munoz-Martin (Student Member, IEEE) was born in Mallorca in 1992.  ...  FMPL-2 is a passive microwave instrument based on a software-defined radio that implements a conventional global navigation satellite system-Reflectometer and an L-band radiometer, occupying 1 U of a 6  ...  ACKNOWLEDGMENT The authors would also like to thank Ms. A. Khoe and C. Carbajo from UPC administration, J. Giner, R. Tardío, and A.  ... 
doi:10.1109/jstars.2020.2977959 fatcat:jr2bvllj7ncijptv2pemz7l2ay
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