부산대학교 도서관

In this work, parasitic radiation through narrow wall slots of additively manufactured slotted waveguides is experimentally characterized for the mm-Wave frequency range. By varying the size and periodicity of the slots, the impact of this combination on the far and near end cross talk is measured at individual specimens. Not until violating established design rules by largely exceeding the recommended sizes, a significant magnitude of cross talk in the range of −15 to −20 dB is measured over a length of ≈21 mm. However, with intended design of slotted waveguides, almost negligible magnitudes of −50 dB are achieved over the same distance. Moreover, it is shown that even in dense arrangements, where two neighboring slotted waveguides share one single common wall of only 400 µm thickness, cross talk still remains in the order of −35 dB over 20 mm.