Zehentner J., Macháč J., Migliozzi M.: Upper Cut-Off Frequency of the Bound Wave and New Leaky Wave on the Slotline, 1997 IEEE MTT-S IMS Digest, Denver, June 1997, pp. 487-490.
This paper contributes to a more profound understanding of uniplanar circuit behaviour. A simple closed-form formula providing the upper cut-off frequency of the bound wave propagating over the slotline is presented. A new leaky wave which brings down this limit due to the overlapping of the bound- and leaky-mode regions is identified and reported. This wave can deteriorate circuit performance, especially in the mm-wave band. Conclusions made for the slotline hold generally for open printed-circuit lines.
