• Bazer, J., and S. N. Karp, Propagation of plane electromagnetic waves past a shoreline, J. Res. Natl. Bur. Stand., Sect. D, 66, 319334, 1962.
  • Boersma, J., and Y. Rahmat-Samii, Comparison of two leading uniform theories of edge diffraction with the exact uniform asymptotic solution, Radio Sci., 15, 11791194, 1980.
  • Clemmow, P. C., Some extensions to the method of integration by steepest descents, Q. J. Mech. Appl. Math., Part 2, 3, 241256, 1950.
  • Clemmow, P. C., Radio wave propagation over a flat Earth across a boundary separating two different media, Philos. Trans. R. Soc. London, Ser. A, 246, 155, 1953.
  • de Jong, G., Electromagnetic wave propagation over an inhomogeneous flat Earth (two-dimensional integral equation formulation), Radio Sci., 10, 925933, 1975.
  • Felsen, L. B., and N. Marcuvitz, Radiation and Scattering of Waves, IEEE Press, Piscataway, N. J., 1994.
  • Hipp, J. E., Soil electromagnetic parameters as functions of frequency, soil density, and soil moisture, Proc. IEEE, 62, 98103, 1974.
  • Maliuzhinets, G. D., Excitation, reflection, and emission of surface waves from a wedge with given face impedances, Sov. Phys. Dokl., 3, 752755, 1958.
  • Norton, K. A., Propagation of radio waves over the surface of the Earth and in the upper atmosphere: Part I, Proc. IRE, 24, 13671387, 1936.
  • Norton, K. A., Propagation of radio waves over the surface of the Earth and in the upper atmosphere: Part II, Proc. IRE, 25, 12031236, 1937.
  • Ott, R. H., RING: An integral equation algorithm for HF-VHF radio wave propagation over irregular, inhomogeneous terrain, Radio Sci., 27, 867882, 1992.
  • Sarabandi, K., Scattering from variable resistive and impedance sheets, J. Electromagn. Waves Appl., 4, 865891, 1990.
  • Sarabandi, K., and M. D. Casciato, Diffraction of radio waves from arbitrary one-dimensional surface impedance discontinuities, IEEE Trans. Antennas Propag., 47, 8696, 1999.
  • Sarabandi, K., M. D. Casciato, and I. Koh, Efficient calculation of the fields of a dipole radiating above an impedance surface, IEEE Trans. Antennas Propag., 50, 12221235, 2002.
  • Senior, T. B. A., and J. L. Volakis, Approximate Boundary Conditions in Electromagnetics, IEE Press, London, UK, 1995.
  • Sklar, B., Digital Communications, Fundamentals and Applications, Prentice-Hall, Old Tappan, N. J., 1988.
  • Ulaby, F. T., R. K. Moore, and A. K. Fung, Microwave Remote Sensing, Active and Passive, vols. 1, 2, and 3, Artech House, Norwood, Mass., 1986.
  • Wait, J. R., Recent analytical investigations of electromagnetic ground wave propagation over inhomogeneous Earth models, Proc. IEEE, 62, 10611072, 1974.