Short-rise-time microwave pulse propagation through dispersive biological media

Albanese, Richard A.; Penn, John W.; Medina, Richard L.

doi:10.1364/josaa.6.001441

Cited by 87 publications

(68 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Introduction. The study of transient electromagnetic waves in lossy dispersive dielectrics is of great interest due to numerous applications [AMP94,APM89]. These include microwave imaging for medical applications in which one seeks to investigate the internal structure of an object (the human body) by means of electromagnetic fields at microwave frequencies (300 MHz -30 GHz).…”

mentioning

confidence: 99%

A computational and statistical framework for multidimensional domain acoustooptic material interrogation

Banks

Bokil

2005

Quart. Appl. Math.

View full text Add to dashboard Cite

Abstract. We consider an electromagnetic interrogation technique in two and three dimensions for identifying the dielectric parameters (including the permittivity, the conductivity and the relaxation time) of a Debye medium. In this technique, a travelling acoustic pressure wave in the Debye medium is used as a virtual reflector for an interrogating microwave electromagnetic pulse that is generated in free space. The reflections of the microwave pulse from the air-Debye interface and from the acoustic pressure wave are recorded at a remote antenna. The data is used in an inverse problem to estimate the locally pressure dependent dielectric parameters of the Debye medium. We present a time domain formulation that is solved using finite differences (FDTD) in time and in space. Perfectly matched layer (PML) absorbing boundary conditions are used to absorb outgoing waves at the finite boundaries of the computational domain, preventing spurious reflections from reentering the domain.Using the method of least squares for the parameter identification problem, we compare two different algorithms (the gradient based Levenberg-Marquardt method and the gradient free, simplex based Nelder-Mead method) in solving an inverse problem to calculate estimates for two or more dielectric parameters. Finally we use statistical error analysis to construct confidence intervals for all the presented estimates, thereby providing a probabilistic statement about the computational procedure with uncertainty aspects of estimates.

show abstract

mentioning

confidence: 99%

A computational and statistical framework for multidimensional domain acoustooptic material interrogation

Banks

Bokil

2005

Quart. Appl. Math.

View full text Add to dashboard Cite

show abstract

“…The method we use is based on the Fourier transform that allows us to investigate the dynamical evolution of electromagnetic pulses in linear, homogeneous, dispersive media by conducting numerical experiments. Previous investigators have used a Fourier series calculation to successfully predict the occurrence of so-called Brillouin precursors in a water half-space for incident pulses having sufficiently short rise times [1]. This report documents the computation of propagated waveforms in linear dispersive half-spaces characterized by Debye and Lorentz permittivity models.…”

Section: Introductionmentioning

confidence: 75%

Wideband Pulse Propagation in Linear Dispersive Bio-dielectrics Using Fourier Transforms

Franzen¹

1999

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of Information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503.

show abstract

“…The study of transient electromagetic waves in lossy dispersive dielectrics is of great interest due to numerous applications [AMP94,APM89]. These include microwave imaging for medical applications in which one seeks to investigate the internal structure of an object (the human body) by means of electromagnetic fields at microwave frequencies (300 MHz -30 GHz).…”

Section: Performing Organization Name(s) and Address(es)mentioning

confidence: 99%

A Computational and Statistical Framework for Multidimensional Domain Acoustooptic Material Interrogation

Banks¹,

Bokil²

2005

View full text Add to dashboard Cite

We consider an electromagnetic interrogation technique in two and three dimensions for identifying the dielectric parameters (including the permittivity, the conductivity and the relaxation time) of a Debye medium. In this technique a travelling acoustic pressure wave in the Debye medium is used as a virtual reflector for an interrogating microwave electromagnetic pulse that is generated in free space. The reflections of the microwave pulse from the air-Debye interface and from the acoustic pressure wave are recorded at a remote antenna. The data is used in an inverse problem to estimate the locally pressure dependent dielectric parameters of the Debye medium. We present a time domain formulation that is solved using finite differences (FDTD) in time and in space. Perfectly matched layer (PML) absorbing boundary conditions are used to absorb outgoing waves at the finite boundaries of the computational domain, preventing spurious reflections from reentering the domain.Using the method of least squares for the parameter identification problem, we compare two different algorithms (the gradient based Levenberg-Marquardt method, and the gradient free, simplex based Nelder-Mead method) in solving an inverse problem to calculate estimates for two or more dielectric parameters. Finally we use statistical error analysis to construct confidence intervals for all the presented estimates, thereby providing a probabilistic statement about the computational procedure with uncertainty aspects of estimates.Keywords: Electromagnetic-acoustic interaction, Debye dielectric materials, pulsed antenna source microwaves, inverse problems, FDTD, statistical inference. † email: htbanks@ncsu.edu ‡ email: vabokil@ncsu.edu 1 Report Documentation Page Form Approved OMB No. 0704-0188Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

show abstract

Short-rise-time microwave pulse propagation through dispersive biological media

Cited by 87 publications

References 7 publications

A computational and statistical framework for multidimensional domain acoustooptic material interrogation

A computational and statistical framework for multidimensional domain acoustooptic material interrogation

Wideband Pulse Propagation in Linear Dispersive Bio-dielectrics Using Fourier Transforms

A Computational and Statistical Framework for Multidimensional Domain Acoustooptic Material Interrogation

Contact Info

Product

Resources

About