Abstract: Ortho-mode transducer, with dual band frequency which is provided with a turnstile connection and an OMT-connection, where the ports of one of the bands or first band, are aligned with a longitudinal axis of the ortho-mode transducer arrangement, whereas the ports of the other band or second band, are arranged transversally to the longitudinal axis of the ortho-mode transducer, due to this configuration the branches from the turnstile connection to the OMT-connection are symmetrical two by two and compact having a C-shaped configuration and arranged so that they are facing two by two, with a dual Power Distribution circuit housed in an interior space defined by the branches or arms for the second band; due to this configuration, as well as reducing the space in a circular polarisation, neither sheet polarisers nor septums are required, and furthermore the transducer serves both for circular and linear polarisations.