A High-Scanning-Rate Leaky-Wave Antenna Based on Double Layer Spoof Surface Plasmon Polaritons
ZHANG Chenghao
HE Yao
PENG Xiangfei
Abstract：With the scanning rate of traditional spoof surface plasmon polaritons(SSPPs)leaky-wave an-tenna being low,a novel double layer SSPPs element is proposed,and a leaky-wave antenna with high scanning rate is realized on the basis of this.The proposed double layer SSPPs element consists of a top SSPPs element with a"H"cell and a bottom SSPPs element with a"I"element.The proposed element is characterized by independently controlling the cut-off frequency and slope of the dispersion curve,realizing the cut-off frequency and slope of dispersion curve to be controlled independently by controlling the disper-sion property of the top and bottom SSPPs elements respectively.The radiation of the proposed leaky-wave antenna is realized by sinusoidal surface impedance modulation of the"H"elements on the top layer.Due to the existence of the bottom"I"SSPPs elements,the strong dispersion property is introduced to im-prove the growth rate of period phase shift,thus achieving the high scanning rate.In addition,the open stopband(OSB)phenomenon of the leaky-wave antenna is almost completely suppressed by introducing short open-ended stubs in the periodic radiation structure.The prototype of the proposed leaky-wave an-tenna is simulated,machined and measured.The leaky-wave antenna is capable of achieving continuous wide-angle scanning from-63° to 63° at a narrow band between 8.8 GHz and 10.8 GHz.The consistency between the experimental and the simulated results proves the correctness of the proposed double-layer SSPPs element and the design theory.
Keywords：double layer spoof surface plasmons polaritons(SSPPs)leaky-wave antennahigh scanning ratedispersion analysis
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 36-41 )