@conference {08_URSIESP_Izquierdo-MartinezRuiz-Cruz_DisenodeOMTs, title = {Dise{\~n}o de OMTs (Ortho-Mode Transducers) con la uni{\'o}n Turnstile}, booktitle = {Proc. 2008 Simposium Nacional URSI (in Spanish)}, year = {2008}, month = {Sept.}, pages = {1-4}, abstract = {This paper presents the design of an orthomode transducer (OMT) based on the Turnstile junction with two main characteristics: a) the routing branches for each polarization are made in both E- and H-plane configuration, and b) the used Turnstile junction has an optimized internal profile inspired on mitered bends. These branches are made up of well-known waveguide elements, such as E- and H-plane bends and height transformers, which can be efficiently analyzed by specialized codes or available commercial software. The proposed structures are illustrated with the design of a complete OMT. The numerical simulations of the OMT elements and the performance of the overall structure in the band 13-19 GHz are presented in this communication, obtaining return losses better than 24dB in a 37\% fractional bandwidth for both polarizations.}, url = {http://w3.iec.csic.es/ursi/paginas/index_congresosreali.htm}, author = {Izquierdo-Martinez, I and J A Ruiz-Cruz} }