A problem of electromagnetic wave radiation by narrow slots cut in an end wall of a semi-infinite waveguide section into space above a perfectly conducting sphere is solved in a strict self-consistent formulation by the generalized method of induced magnetomotive forces (MMF). Inside the waveguide section, a reentrant cavity formed by the volume between a slotted diaphragm and the waveguide end wall is located. The waveguide is operating in the frequency range of a single-mode regime. The electrodynamic characteristics of this radiating system with the spherical screen of resonant dimensions are investigated numerically and ex-perimentally. The possibility to develop the spherical antennas with a narrow-band frequency, energy, and spatial characteristics is substantiated.
2. Mittra, R., Computer Techniques for Electromagnetics, Pergamon Press, NY, 1973.
3. Reznikov, G. B., Antennas of Flying Vehicles, Soviet Radio, Moscow, 1967 (in Russian).
4. Schantz, H., "Nanoantennas: A concept for efficient electrically small UWB devices," IEEE International Conference ICU 2005, 264-268, Sept. 2005.
5. Vorst, A. V., A. Rosen, and Yu. Kotsuka, RF/Microwave Interaction with Biological Tissues, Willey-IEEE Press, NY, 2006.
6. Mushiake, Y. and R. E. Webster, "Radiation characteristics with power gain for slots on a sphere," IRE Trans. Antennas Propagat., Vol. 5, 47-55, 1957.
7. Leung, K. W., "Theory and experiment of a rectangular slot on a sphere," IEEE Trans. Microwave Theory Tech., Vol. 46, 2117-2123, 1998.
8. Kwok, W. L., "Rectangular and zonal slots on a sphere with a backing shell: Theory and experiment," IEEE Trans. Antennas Propagat., Vol. 51, 1434-1442, 2003.
9. Berdnik, S. L., Yu. M. Penkin, V. A. Katrich, M. V. Nesterenko, and V. I. Kijko, "Electromagnetic waves radiation into the space over a sphere by a slot in the end-wall of a semi-infinite rectangular waveguide," Progress In Electromagnetics Research B, Vol. 46, 139-158, 2013.
10. Berdnik, S. L., V. A. Katrich, M. V. Nesterenko, and Yu. M. Penkin, "Spherical antenna excited by a slot in an impedance end-wall of a rectangular waveguide," Proc. of the XVIII-th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory, 111-114, Lviv, Ukraine, 2013.
11. Berdnik, S. L., V. A. Katrich, Yu. M. Penkin, M. V. Nesterenko, and S. V. Pshenichnaya, "Energy characteristics of a slot cut in an impedance end-wall of a rectangular and radiating into the space over a perfectly conducting sphere," Progress In Electromagnetics Research M, Vol. 34, 89-97, 2014.
12. Berdnik, S. L., V. S. Vasylkovskyi, M. V. Nesterenko, and Yu. M. Penkin, "Radiation fields of the spherical slot antenna in a material medium," Proc. of the X-th Anniversary International Conference on Antenna Theory and Techniques, Kharkiv, Ukraine, 282–284, 2015.
13. Nesterenko, M. V., V. A. Katrich, Yu. M. Penkin, and S. L. Berdnik, Analytical and Hybrid Methods in Theory of Slot-Hole Coupling of Electrodynamic Volumes, Springer Science+Business Media, New York, 2008.
14. Long, S. A., "Experimental study of the impedance of cavity-backed slot antennas," IEEE Trans. Antennas Propag., Vol. 23, 1-7, 1975.
15. Lee, J. Y., T. Sh. Horng, and N. G. Alexopoulos, "Analysis of cavity-backed aperture antennas with a dielectric overlay," IEEE Trans. Antennas Propag., Vol. 42, 1556-1562, 1994.
16. Nesterenko, M. V. and V. A. Katrich, "The method of induced magnetomotive forces for cavity-backed slot radiators and coupling slots," Radioelectronics and Communications Systems, Vol. 47, 8-13, 2004.
17. Mittra, R. and S. W. Lee, Analytical Techniques in the Theory of Guided Waves, Collier-Macmillan Limited, London, 1971.