Electric and Magnetic Coupling through Small Apertures in Shield Walls of Any Thickness
- 1 October 1972
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 20 (10), 689-695
- https://doi.org/10.1109/tmtt.1972.1127844
Abstract
A method is presented for evaluating the coupling between two identical resonant cavities coupled by a small aperture in a plane common wall of arbitrary thickness. The coupling is related to the frequencies of the symmetric and asymmetric modes of oscillation of the coupled cavity structure, and a variational technique is used to determine those frequencies. The method is applied to circular and rectangular apertures, and it is shown that the coupling is separable into electric and magnetic terms. The results enable theoretical solutions to be obtained for the electric and magnetic polarizabilities of circular and rectangular apertures in walls of zero thickness, and equivalent polarizabilities to be obtained when the wall thickness is nonzero. Curves of numerical values are given for circular and rectangular apertures. With zero wall thickness, the results obtained are the same as those of Bethe for a circular aperture and give good agreement with Cohn's experimental results for rectangular apertures.Keywords
This publication has 10 references indexed in Scilit:
- Analysis and Synthesis of Waveguide Multiaperture Directional CouplersIEEE Transactions on Microwave Theory and Techniques, 1968
- Coupling Holes Between Resonant Cavities or Wave-Guides Evaluated in Terms of Volume RatiosIEEE Transactions on Microwave Theory and Techniques, 1964
- The Expansions of Electromagnetic Fields in CavitiesIEEE Transactions on Microwave Theory and Techniques, 1958
- Variational principles for electromagnetic resonators and waveguidesIEEE Transactions on Antennas and Propagation, 1956
- Reaction Concept in Electromagnetic TheoryPhysical Review B, 1954
- The Electric Polarizability of Apertures of Arbitrary ShapeProceedings of the IRE, 1952
- Microwave Coupling by Large AperturesProceedings of the IRE, 1952
- CorrectionProceedings of the IRE, 1952
- Determination of Aperture Parameters by Electrolytic-Tank MeasurementsProceedings of the IRE, 1951
- Theory of Diffraction by Small HolesPhysical Review B, 1944