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Derivation and comparison of SAR and frequency-wavenumber migration within a common inverse scalar wave problem formulation
- C. Gilmore, I. Jeffrey, J. Lovetri
- MathematicsIEEE Transactions on Geoscience and Remote…
- 5 June 2006
The comparison shows that the approximations required to derive each technique from the integral equation formulation of the inverse scalar wave problem are nearly identical, and hence the two imaging algorithms and physical models are making similar assumptions about the solution to the inverse problem, thus clarifying why the imaging equations are so similar.
A Three-Dimensional Precorrected FFT Algorithm for Fast Method of Moments Solutions of the Mixed-Potential Integral Equation in Layered Media
- V. Okhmatovski, M. Yuan, I. Jeffrey, R. Phelps
- Computer ScienceIEEE Transactions on Microwave Theory and…
- 17 November 2009
A unique combination of O(N logN) computational complexity, fully three-dimensional boundary-element modeling in layered substrates, and full-wave modeling from dc to multi-gigahertz frequencies makes the algorithm particularly useful for characterizing large interconnect networks embedded in multilayered substrates.
Multiplicatively Regularized Source Reconstruction Method for Phaseless Planar Near-Field Antenna Measurements
- Trevor Brown, I. Jeffrey, P. Mojabi
- MathematicsIEEE Transactions on Antennas and Propagation
- 1 April 2017
This paper approaches the source reconstruction method (SRM) for phaseless planar near-field (NF) antenna measurements by optimizing a multiplicatively regularized cost functional over the equivalent…
On the Equivalence of RWG Method of Moments and the Locally Corrected Nyström Method for Solving the Electric Field Integral Equation
- M. Shafieipour, I. Jeffrey, J. Aronsson, V. Okhmatovski
- Computer ScienceIEEE Transactions on Antennas and Propagation
- 1 February 2014
The first-order locally corrected Nyström (LCN) method for the electric field integral equation is modified to ensure continuity of the current between triangular elements of the mesh to be viewed as a point-based discretization of the RWG MoM offering improved efficiency in its acceleration with the fast multipole algorithm.
A Monte Carlo Method for Simulating Scattering From Sea Ice Using FVTD
- D. Isleifson, I. Jeffrey, L. Shafai, J. Lovetri, D. Barber
- PhysicsIEEE Transactions on Geoscience and Remote…
- 1 July 2012
A scattering model based on a Monte Carlo method and the finite-volume time-domain (FVTD) method has been created for sea ice scattering simulations and showed good agreement for copolarized signals in a series of case studies.
Hardware invariant protocol disruptive interference for 100BaseTX Ethernet communications
- I. Jeffrey, C. Gilmore, George Siemens, J. Lovetri
- Computer ScienceIEEE Transactions on Electromagnetic…
- 1 August 2004
It is shown that low power, narrowband, differential-mode voltage levels on a 100BaseTX Ethernet twisted-pair can seriously degrade network throughput independent of the physical features of the network or the protocol interpreter hardware.
Calibration methods for electric field probes and GTEM cells
- B. Kordi, J. Lo Vetri, G. Bridges, I. Jeffrey
- BusinessInternational Symposium on Electromagnetic…
- 1 November 2004
In this paper, two techniques are presented for in-situ calibration of an electric-field probe, in our case an asymptotic conical dipole. The first technique uses a parallel-plate probe as a…
Grain bin monitoring via electromagnetic imaging
FULL-VECTORIAL PARALLEL FINITE-ELEMENT CONTRAST SOURCE INVERSION METHOD
The multiplicatively regularized flnite-element contrast source inversion algorithm (MR-FEM-CSI) is used to solve the full- vectorial three-dimensional (3D) inverse scattering problem. The contrast…