The inset dielectric guide (IDG) is just a rectangular groove filled with dielectric, which retains many of the advantages of dielectric guides, without fabrication and loss problems. Quasi-planar IDGs are attractive for applications in microwave and millimeter-wave frequency ranges, as they can be used as low loss and low cost transmission lines, directional couplers, nonreciprocal phase shifters, antennas and other devices. In this paper we address circular IDG-type structures, investigating hybrid wave propagation in single microslot lines loaded with semi-circular dielectric cylinders. The analysis is based on systems of singular integral-integrodifferential equations of the first kind. The proposed algorithms are rapidly convergent, yielding very accurate results for the propagation constants and for the modal equivalent magnetic currents of the principal as well as the higher-order modes.
Propagation Constant High Order Mode Magnetic Current Perfect Electric Conductor Moment Method Basis
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This work is co-funded by the European Social Fund (ΕΚΤ) with 75% and National Resources (Greek Ministry of National Education and Religious Affairs) with 25% under the ΕΠΕΑΕΚ project “Archimedes – Support of Research Groups in TEI of Crete – 2.2.-7 – Smart antenna study and design using techniques of computational electromagnetics and pilot development and operation of a digital audio broadcasting station at Chania (SMART-DAB)”.
Also, the author would like to thank Prof. John L. Tsalamengas and Ass. Prof. George Fikioris, of the National Technical University of Athens, for their helpful discussions and insightful comments.
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1.Microwave Communications and Electromagnetic Applications Laboratory, Division of Telecommunications, Department of ElectronicsTechnological Educational Institute (T.E.I.) of Crete – Chania Branch, Romanou 3ChalepaGreece