Centered inclined slot coupling between waveguides with coplanar axes |
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Authors: | Ashish Kumar Tiwari DR Poddar BN Das |
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Affiliation: | 1. Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India;2. Electrical Engineering Department, Jadavpur University, Calcutta, West Bengal 80309, India;3. Indian Institute of Technology, Kharagpur, West Bengal 721302, India |
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Abstract: | The article presents the method of finding the complete equivalent circuit of two waveguides with coplanar axes coupled through a centered inclined slot in the common broad wall. The variational method based on dyadic Green's function is used for finding the parameters of the equivalent circuit. A cosinusoidal aperture field distribution is assumed. Considerable mathematical simplification is resulted from replacing the centered inclined slot by an equivalent magnetic dipole. Coupling slot characteristics are deduced, including resonant length, dominant mode scattering in both the waveguides. Numerical and experimental results for resonant lengths and scattering parameters are presented over a range of tilt angles, frequencies, and waveguide dimensions. These results have significant applications in linear waveguide arrays and coupler design. © 2010 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2011. |
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Keywords: | aperture coupling inclined slot slot antennas slot arrays |
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