Abstract
An efficient design for coupling energy from a traditional planar microwave transmission line to a topological metasurface line wave is presented. An antipodal slotline is used as the starting transmission line, which is then coupled to the metasurface along a specific point that maximizes field matching. Additional modifications to the interface between the two structures improves the coupling further. A simulated loss analysis isolates the effect of the transitions from the rest of the structure, showing a S21 contribution of only -0.28 dB/transition. The choice of transition allows for broadband operation, with less than -0.5 dB/transition S21 contribution over most of the operating region of the metasurface. This efficient design is the first effort to integrate topologically robust metasurface transmission lines to traditional microwave systems, opening the door to future uses of such structures in practical systems.
Published Version
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