A Spoof Surface Plasmon Polarization Transmission Line for Propagating Differential Signals

To reduce the circuit area and enhance the anti-interference capability, this paper proposes a spoof surface plasmon polarization (SSPP) differential transmission line. The remarkable advantage of this differential transmission line is that it can transmit differential signals through a single transmission line, greatly simplifying the wiring process and reducing design complexity. Its working frequency range is 12-18 GHz. Within this frequency range, Both the odd and even modes present high transmission efficiency. Furthermore, the isolation between odd and even modes is greater than 45 dB, ensuring the stability and accuracy of signal transmission.