Orthomode Transducer in Waveguide Technology Using E-field Rotators

This paper presents the analysis and design of the mode converters from TE<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</inf> in a rectangular waveguide to TE<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</inf> and TM<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</inf> modes in a circular waveguide, achieved through geometric variations and using several novel substructures such as electric field rotators, bends, and T-type dividers in plane-E used to reduce the size of the final prototype and increase the fractional bandwidth. The simulation generated the TE<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</inf> and TE<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</inf> modes through two components, such as the conversion section and the feed network. The difference between the propagating and nonpropagating modes is greater than 35.0 dB at both converters. Both designs achieve an available percentage of bandwidth of at least 10.0%. Finally, possible structures of mode converter prototypes for a manufactured in-control numeric machine or 3D printer are also presented.