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Spoof planar plasmonic waveguides (SPPWs) are a new type of low-loss surface wave transmission line whose modes are tightly confined near the SPPWs. Spoof surface plasmon polaritons (SPPs) propagating in the SPPW can be efficiently converted into free-space radiation by high-efficiency antennas. In this article, three patch antenna arrays are introduced to show the advantages of SPPWs used in a feed...
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