Publications 1993 2017

  • 20 h-Index
  • 73 Conference contribution
  • 73 Article
  • 2 Chapter
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Conference contribution
2016

Radiation properties of a rectangular patch antenna loaded with a magnetoelectric material

Kempel, L., Shanker, B. & Vittoria, C. Oct 25 2016 2016 IEEE Antennas and Propagation Society International Symposium, APSURSI 2016 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 1731-1732 2 p. 7696572

Research output: ResearchConference contribution

patch antennas
radiation
Microstrip antennas
Radiation
permeability
2015

Distributed linear antenna array pattern performance enhancement

Adrian, A. & Kempel, L. C. Oct 22 2015 2015 IEEE Antennas and Propagation Society International Symposium, APS 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 2015-October, p. 2497-2498 2 p. 7305637

Research output: ResearchConference contribution

Array processing
Antenna arrays

Longitudinal groove loading of a half-width microstrip leaky-wave antenna

Oladimeji, K., Frasch, J., Rothwell, E. & Kempel, L. Oct 21 2015 2015 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 40 1 p. 7303324

Research output: ResearchConference contribution

communication system
ability
Antennas
Microstrip antennas
Communication systems
2014

Gyromagnetic material characterization and error analysis using a partially-filled waveguide technique

Tang, J., Crowgey, B. R., Rothwell, E. J., Shanker, B., Kempel, L. C. & Havrilla, M. Nov 12 2014 2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2014 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 9 1 p. 6955391

Research output: ResearchConference contribution

Error analysis
Waveguides
Mechanical testing
Tensors
Antennas
2013

Characterization of gyromagnetic materials using a partially-filled waveguide technique

Tang, J., Crowgey, B. R., Tuncer, O., Rothwell, E. J., Shanker, B., Kempel, L. C. & Havrilla, M. 2013 2013 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), USNC-URSI 2013 - Proceedings. p. 227 1 p. 6715531

Research output: ResearchConference contribution

Tensors
Waveguides
Permittivity

GMM: A flexible framework for including multiple approximation functions in integral equation solvers

Dault, D., Nair, N. V., Shanker, B. & Kempel, L. C. 2013 2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings. p. 151-154 4 p. 6565700

Research output: ResearchConference contribution

Method of moments
Integral equations
Requirements engineering
Scattering
2012
1 Citations

A discontinuous Galerkin framework for hybridizing VGFEM and FEM

Tuncer, O., Shanker, B. & Kempel, L. C. 2012 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 6349013

Research output: ResearchConference contribution

Galerkin methods
Waveguides
Scattering
Finite element method
2 Citations

A flexible framework for the solution to surface scattering problems using integral equations

Dault, D., Nair, N. V., Shanker, B. & Kempel, L. C. 2012 Proceedings of the 2012 International Conference on Electromagnetics in Advanced Applications, ICEAA'12. p. 148-151 4 p. 6328611

Research output: ResearchConference contribution

Surface scattering
Integral equations
Method of moments
Triangulation
Geometry

Measurement of anisotropic material properties for antenna applications

Crowgey, B., Tang, J., Tuncer, O., Kempel, L., Rothwell, E. & Shanker, B. 2012 LAPC 2012 - 2012 Loughborough Antennas and Propagation Conference. 6402939

Research output: ResearchConference contribution

Materials properties
Antennas
Scattering parameters
Rectangular waveguides

Radiation of a circularly-polarized microstrip antenna through an uniaxial superstrate: A preliminary study

Ahmed, F., Al-Sulaifanie, B. K. M., Crowgey, B., Rothwell, E., Shanker, B. & Kempel, L. 2012 LAPC 2012 - 2012 Loughborough Antennas and Propagation Conference. 6402970

Research output: ResearchConference contribution

Microstrip antennas
Radiation
Polarization
Antennas
Circular polarization
2011
2 Citations

A discretization framework for scalar integral equations using the generalized method of moments and locally smooth surface approximations

Nair, N. V., Shanker, B. & Kempel, L. 2011 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 3193-3196 4 p. 5997212

Research output: ResearchConference contribution

Method of moments
Integral equations
Acoustics
Scattering
3 Citations

A hybrid discontinuous Galerkin-vector generalized finite element method for electromagnetics

Tuncer, O., Shanker, B. & Kempel, L. C. 2011 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 2487-2490 4 p. 5997028

Research output: ResearchConference contribution

Galerkin methods
Electromagnetic fields
Polynomials
Finite element method
4 Citations

Design study of electronically steerable half-width microstrip leaky wave antennas

Hejase, J. A., Myers, J., Kempel, L. & Chahal, P. 2011 Proceedings - Electronic Components and Technology Conference. p. 1348-1353 6 p. 5898687

Research output: ResearchConference contribution

Antennas
Scanning
Varactors
Metallizing
Diodes
1 Citations

Development of time domain vector generalized finite element method

Tuncer, O., Shanker, B. & Kempel, L. C. 2011 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 2980-2982 3 p. 5997155

Research output: ResearchConference contribution

Finite element method
Physics
Polynomials
Boundary conditions
2 Citations

Generalized method of moments: A flexible discretization scheme for integral equations using locally smooth surface approximations

Nair, N. V., Shanker, B. & Kempel, L. 2011 2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2011. 6105955

Research output: ResearchConference contribution

Method of moments
Integral equations
Scattering

Theoretical analysis of a varactor-loaded half-width leaky-wave antenna

Kempel, L., Rothwell, E., Shanker, B. & Chahal, P. 2011 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011. 6050351

Research output: ResearchConference contribution

Varactors
Antennas
Fires
Antenna phased arrays
Bandwidth

Vector generalized finite element method on tetrahedral meshes and applications of its features in electromagnetic simulations

Tuncer, O., Sahin, F. O., Shanker, B. & Kempel, L. C. 2011 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 2465-2467 3 p. 5997022

Research output: ResearchConference contribution

Finite element method
Polynomials
Demonstrations
Physics
2010

A generalized basis function framework for integral and differential equations in electromagnetics

Tuncer, O., Nair, N. V., Shanker, B. & Kempel, L. C. 2010 2010 Loughborough Antennas and Propagation Conference, LAPC 2010. p. 9-12 4 p. 5666813

Research output: ResearchConference contribution

Integral equations
Differential equations
5 Citations

A hybrid finite element- Vector generalized finite element method for electromagnetics

Tuncer, O., Shanker, B. & Kempel, L. C. 2010 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010. 5561926

Research output: ResearchConference contribution

Finite element method
Brick
30 Citations

An ultrawideband (UWB) switched-antenna-array radar imaging system

Charvat, G. L., Kempel, L. C., Rothwell, E. J., Coleman, C. M. & Mokole, E. L. 2010 IEEE International Symposium on Phased Array Systems and Technology. p. 543-550 8 p. 5613313

Research output: ResearchConference contribution

Radar imaging
Radar systems
Antenna arrays
Ultra-wideband (UWB)
Imaging systems

VGFEM with perfectly matched layers

Tuncer, O., Shanker, B. & Kempel, L. C. 2010 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010. 5561882

Research output: ResearchConference contribution

Anisotropic media
Polynomials
2009

A trough leaky-wave antenna

Jaramillo-Henao, C. A., Kempel, L. C. & Schneider, S. 2009 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 5171768

Research output: ResearchConference contribution

4 Citations

A vector generalized finite element-boundary integral formulation for scattering from cavity-backed apertures

Tuncer, O., Shanker, B. & Kempel, L. C. 2009 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 5171717

Research output: ResearchConference contribution

1 Citations

Development of vector basis functions in vector generalized finite element method for inhomogeneous domains

Tuncer, O., Shanker, B. & Kempel, L. C. 2009 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 5171545

Research output: ResearchConference contribution

3 Citations

Finite element analysis of conformal antennas

Gardner, C., Jarmillo-Heano, C. & Kempel, L. C. 2009 Proceedings of the 2009 International Conference on Electromagnetics in Advanced Applications, ICEAA '09. p. 844-847 4 p. 5297346

Research output: ResearchConference contribution

Antennas
Bandwidth
Finite element method
Structural loads
Radiators
1 Citations

Hybrid generalized finite element-boundary integral method for aperture design

Tuncer, O., Shanker, B. & Kempel, L. C. 2009 European Conference on Antennas and Propagation, EuCAP 2009, Proceedings. p. 2499-2502 4 p. 5068122

Research output: ResearchConference contribution

Finite element method
Radiation

Magneto-dielectric composites with frequency selective surface layers

Hawley, M., Farhat, S., Shanker, B. & Kempel, L. 2009 ICCM International Conferences on Composite Materials.

Research output: ResearchConference contribution

Frequency selective surfaces
Composite materials
Materials properties
Polymers
Fabrication
6 Citations

Radiation by a magneto-dielectric loaded patch antenna

Kempel, L., Shanker, B., Xiao, J. & Schneide, S. W. Dec 8 2009 Loughborough Antennas and Propagation Conference, LAPC 2009 - Conference Proceedings. p. 745-748 4 p. 5352388

Research output: ResearchConference contribution

Microstrip antennas
Radiation
Antennas
Bandwidth
Antenna feeders
2 Citations

Radiation by conformai patch antennas on a magneto-dielectric, low-density material

Kempel, L., Crowgey, B. & Xiao, J. 2009 European Conference on Antennas and Propagation, EuCAP 2009, Proceedings. p. 2974-2976 3 p. 5068230

Research output: ResearchConference contribution

Microstrip antennas
Radiation
Substrates
Polytetrafluoroethylenes
Bandwidth

Simulated surface enhanced raman spectroscopy via scattering on a dense, randomly-oriented, array of nanostructures

Baczewski, A. D., Shanker, B., Kempel, L. C. & Hogan, T. P. 2009 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). 5171941

Research output: ResearchConference contribution

2008
1 Citations

Analysis of arrays of microstrip half-width leaky wave antennas

McCann, J., Janning, D., Kuhl, D., Zeller, K., Radcliffe, J., Schneider, S., Kempel, L. & Griffith, H. 2008 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI. 4619515

Research output: ResearchConference contribution

1 Citations

Dispersion analysis in scalar generalized finite element method

Tuncer, O., Nair, N., Shanker, B. & Kempel, L. C. 2008 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI. 4619716

Research output: ResearchConference contribution

Fast methods for the evaluation of the diffusion kernel with potential extensions to the dissipative kernel

Baczewski, A. D., Vikram, M. R., Shanker, B. & Kempel, L. C. 2008 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI. 4619429

Research output: ResearchConference contribution

Modal solution for the fields due to a magnetic source impressed in a circular cylinder

Villa-Giron, J. M., Shanker, B. & Kempel, L. C. 2008 2008 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, APSURSI. 4619835

Research output: ResearchConference contribution

9 Citations

Securing sensor nodes against side channel attacks

Pongaliur, K., Abraham, Z., Liu, A. X., Xiao, L. & Kempel, L. 2008 Proceedings of IEEE International Symposium on High Assurance Systems Engineering. p. 353-361 9 p. 4708893

Research output: ResearchConference contribution

Sensor nodes
Side channel attack
Volcanoes
Military applications
Taxonomies
2007
1 Citations

Analysis of error propagation in vector generalized finite element methods

Tuneer, O., Lu, C., Nair, N., Shanker, B. & Kempel, L. C. 2007 2007 International Conference on Electromagnetics in Advanced Applications, ICEAA'07. p. 822-825 4 p. 4387430

Research output: ResearchConference contribution

Finite element method
Wave propagation
Differential equations
Polynomials
Boundary conditions

Application of the method of subregions to measurement of layered materials

Perry, B., Cossmann, S., Kempel, L. & Rothwell, E. 2007 Ultra-Wideband, Short-Pulse Electromagnetics 8. Springer Science and Business Media, LLC, p. 211-218 8 p.

Research output: ResearchConference contribution

Conformal antennas on singly-curved surfaces

Villa-Giron, J., Shanker, B. & Kempel, L. C. 2007 IET Seminar Digest. 11961 ed. Vol. 2007

Research output: ResearchConference contribution

Antennas
Integral equations
Bandwidth
4 Citations

Empirical analysis of the effects of parasitic elements on the halfwidth leaky wave antenna

Radcliffe, J., Griffith, H., McCann, J., Zeller, K., Pasala, K., Schneider, S. & Kempel, L. 2007 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 3624-3627 4 p. 4396323

Research output: ResearchConference contribution

Antennas
Bandwidth
Radiators
Research laboratories
Air
3 Citations

Finite element-boundary integral simulation of a conformal microstrip leaky-wave antenna

Radcliffe, J., Schneider, S., Kempel, L. & Penno, R. 2007 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 5809-5812 4 p. 4396872

Research output: ResearchConference contribution

Antennas
Circular cylinders
Microstrip antennas
Bandwidth
Radiation

Synthesis and characterization of magneto-dielectric composites for radio frequency applications

Farhat, S., Hawley, M., Kempel, L. & Balasubramaniam, S. 2007 Materials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems". Vol. 2, p. 838-844 7 p.

Research output: ResearchConference contribution

radio frequencies
composite materials
synthesis
Composite materials
iron oxides

The generalized moment method for analysis of structures with varying feature sizes

Nair, N. V., Vikram, M., Shanker, B. & Kempel, L. C. 2007 IET Seminar Digest. 11961 ed. Vol. 2007

Research output: ResearchConference contribution

Method of moments
Physics
2006

Design and synthesis of polymer nanocomposites for radio frequency applications

Farhat, S. A., Hawley, M. C., Balasubramaniam, S. & Kempel, L. C. 2006 American Society for Composites - 21st Technical Conference of the American Society for Composites 2006. Vol. 1, p. 518-527 10 p.

Research output: ResearchConference contribution

Nanocomposites
Polymers
Permittivity
Composite materials
Processing
1 Citations

Generalized finite element method for analyzing scattering from non-Lipschitzian domains

Lu, C., Villa, J., Shanker, B. & Kempel, L. C. 2006 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). p. 1783-1786 4 p. 1710912

Research output: ResearchConference contribution

8 Citations

Low-cost, high resolution X-band laboratory radar system for synthetic aperture radar applications

Charvat, G. L. & Kempel, L. C. 2006 2006 IEEE International Conference on Electro Information Technology. p. 529-531 3 p. 4017760

Research output: ResearchConference contribution

Radar systems
Synthetic aperture radar
Radar
Costs
Continuous wave radar
2005
2 Citations

Analysis of layering dielectrics on effective permittivity using wave matrices

Killips, D. S., Kempel, L., Nyquist, D. & Rothwell, E. 2005 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). Vol. 3 A, p. 212-215 4 p. 1552216

Research output: ResearchConference contribution

3 Citations

FE-BI analysis of a leaky-wave antenna with resistive sheet termination

Kempel, L., Schneider, S., Radcliffe, J., Janning, D. & Thiele, G. 2005 2005 IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics. Vol. 2005, p. 672-675 4 p. 1469677

Research output: ResearchConference contribution

Antennas
Bandwidth
Radiation
7 Citations

Three-dimensional isotropic meta-materials

Mercure, P. K., Haley, R. P., Bogle, A. & Kempel, L. 2005 IEEE Antennas and Propagation Society, AP-S International Symposium (Digest). Vol. 1 B, p. 623-626 4 p. 1551636

Research output: ResearchConference contribution

2004

Coupled electromagnetic thermal and kinetic modeling for microwave processing of polymers

Sun, R., Zhou, S., Zong, L., Mandal, D., Kempel, L., Hawley, M. & Benard, A. 2004 AIChE Annual Meeting, Conference Proceedings. p. 1717 1 p.

Research output: ResearchConference contribution

Curing
Microwaves
Kinetics
Polymers
Processing

Dielectric properties of crosslinking epoxy resins at 2.45 GHZ

Zong, L., Zhou, S., Sun, R., Kempel, L. C. & Hawley, M. C. 2004 AIChE Annual Meeting, Conference Proceedings. p. 1455 1 p.

Research output: ResearchConference contribution

Epoxy resins
Crosslinking
Dielectric properties
Temperature
Ethers