[1] Lewin, L., Advanced Theory of Waveguides, London: Iliffe, 1951.

[2] Galejs, J., "Admittance of a Waveguide Radiating into a Stratified Plasma," IEEE Trans. Antennas Propagat., Vol. AP-13, January 1965, pp. 64 70.

[3] Bodnar, D. G. and D. T. Paris, "New Variational Principle in Electromagnetics," IEEE Trans. Antennas Propagat., Vol. AP-18, March 1970, pp. 216 223.

[4] Croswell, W. F., R. C. Ruddock, and D. M. Hatcher, "The Admittance of a Rectangular Waveveguide Radiating into a Dielectric Slab," IEEE Trans. Antennas Propagat., Vol. AP-15, September 1967, pp. 627 633.

[5] Croswell, W. F., et al., "The Input Admittance of a Rectangular Waveveguide-Fed Aperture Under an Inhomogeneous Plasma: Theory and Experiment," IEEE Trans. Antennas Propagat., Vol. AP-16, July 1968, pp. 475 487.

[6] Mailloux, R. J., "Radiation and Near Field Coupling Between Two Collinear Open Ended Waveguides," IEEE Trans. Antennas Propagat., Vol. AP-17, January 1969, pp. 49 55.

[7] Mailloux, R. J., "First Order Solution for Mutual Coupling Between Waveguides Which Propagate Two Orthogonal Modes," IEEE Trans. Antennas Propagat., Vol. AP-17, November 1969, pp. 740 746.

[8] Jamieson, A. R., and T. E. Rozzi, "Rigorous Analysis of Cross Polarization in Flange-Mounted Rectangular Waveguide Radiators," Electron. Lett., Vol. 13, November 24, 1977, pp. 742 744.

[9] Teodoridis, V., T. Sphicopoulos, and F. E. Gardiol, "The Reflection from an Open-Ended Rectangular Waveguide Terminated by a Layered Dielectric Medium," IEEE Trans. Microwave Theory Tech., Vol MTT-36, May 1985, pp. 359 366.

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