Abstract
The performance of multihole directional couplers can be considerably improved by placing a second hole structure to the existing one. The improvement may be aimed at directivity or at suppression of certain unwanted modes propagating either in forward or backward direction.
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Janzen, G., Stickel, H., Report IPF-83-9, University of Stuttgart, 1983
Janzen, G., Stickel, H., Report IPF-83-8, University of Stuttgart, 1983
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Janzen, G., Stickel, H. Improved directional couplers for overmoded waveguide systems. Int J Infrared Milli Waves 5, 1405–1417 (1984). https://doi.org/10.1007/BF01013366
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DOI: https://doi.org/10.1007/BF01013366