Odd-mode and even-mode spoof surface plasmon polaritons supported by complementary plasmonic metamaterial with underlayer ground

Abstract

In this letter, odd-mode and even-mode spoof surface plasmon polaritons (SSPPs) supported by complementary plasmonic metamaterial with underlayer ground are investigated. The dispersion characteristics and electric field distributions of the odd-mode and even-mode SSPPs are studied. Different high-efficiency conversion structures are proposed to realize the excitation of odd-mode and even-mode SSPPs transmissions. The odd-mode and even-mode SSPPs transmission lines are simulated and measured. The measured insertion losses of odd-mode transmission line are within 2.58 ± 1.23 dB from 3.0 to 10.0 GHz. The measured insertion losses of even-mode transmission line are within 1.66 ± 1.18 dB from 2.0 to 12.0 GHz. The simulation and measurement results validate the high-efficiency excitation and excellent propagation performance of odd-mode and even-mode SSPPs on the complementary plasmonic metamaterial with underlayer ground in the microwave frequencies.