Abstract
Numerical analysis is presented for the characteristic parameters of centered-inclined coupling slot in rectangular waveguides, taking into account the transverse distribution of the electric field across the slot aperture. Integral equations are formulated based on dyadic Green’s function theories and solved using the method of moments. Trigonometric basis functions are adopted. It is found that the method will converge with up to ten basis functions. The characteristic parameters can be easily obtained for different slot sizes. Resonant length and resonant resistance of the coupling slots are calculated. It is shown that the calculated results have very high accuracy, compared with simulated results obtained from commercial software. Therefore, it can be effectively applied in the synthesis of antenna arrays. Effects of the transverse distribution on calculating resonant parameters of the coupling slot are also analyzed. The results show that if the transverse distribution of the electric field is neglected, the calculated error tends to become larger when the slot gets wider or thinner.
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References
R. S. Elliott. An improved design procedure for small arrays of shunt slots. IEEE Transactions on Antennas and Propagation, 31(1983)1, 48–53.
Wang Yan-fei, Liu Chang, Zhan Xue-li, et al.. An ultrafine multifunctional unmanned aerial vehicle SAR system. Journal of Electronics & Information Technology, 35(2013)7, 1569–1574.
V. M. Pandharipande and B. N. Das. Equivalent circuit of a narrow-wall waveguide slot coupler. IEEE Transactions on Microwave Theory and Techniques, 27(1979)9, 800–804.
G. Mazzarella and G. Montisci. Wideband equivalent circuit of a centered-inclined waveguide slot coupler. Journal of Electromagnetic Waves and Applications, 14(2000)1, 133–151.
T. V. Khac and C. T. Carson. Impedance properties of a longitudinal slot antenna in the broad face of a rectangular waveguide. IEEE Transactions on Antennas and Propagation, 21(1973)5, 708–710.
Lu Yinghua. Numerical Methods in Computational Electromagnetics. Beijing, Tsinghua University Press, 2006, Chapter 8.
R. W. Lyon and A. J. Sangster. Efficient moment method analysis of radiating slots in a thick-walled rectangular waveguide. IEE Proceedings, 128(1981)4, 197–205.
W. Hanyang and W. Wei. Moment method analysis of a feeding system in a slotted-waveguide antenna. IEE Proceedings, 135(1988)5, 313–318.
S. R. Rengarajan. Compound radiating slots in a broad wall of a rectangular waveguide. IEEE Transactions on Antennas and Propagation, 37(1989)9, 1116–1123.
Jan Cheng-Geng and Hsu Powen. Moment method analysis of sidewall inclined slots in rectangular waveguides. IEEE Transactions on Antennas and Propagation, 39(1991)1, 68–73.
Jan Cheng-Geng, Wu Rucy-Beei, Hsu Powen, et al.. Analysis of edge slots in rectangular waveguide with finite waveguide wall thickness. IEEE Transactions on Antennas and Propagation, 44(1996)8, 1120–1126.
S. R. Rengarajan. Analysis of a centerd-inclined waveguide slot coupler. IEEE Transactions on Microwave Theory and Techniques, 37(1989)5, 884–889.
R. S. Elliot. Antenna Theory and Design. Hoboken, NJ, USA, John Wiley & Sons, Inc., 2003, Chapter 3.
Ding Hong. Computaion for coupling waveguide slot’s active impedance. Acta Electronica Sinica, 40(2012)4, 852–855.
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Communication author: Wang Xucun, born in 1987, male, Ph.D..
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Wang, X., Zhou, Y. & Wang, Y. Numerical analysis of centered-inclined coupling slots in rectangular waveguides. J. Electron.(China) 31, 334–340 (2014). https://doi.org/10.1007/s11767-014-4088-4
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DOI: https://doi.org/10.1007/s11767-014-4088-4