Wide-Angle Scanning Leaky-Wave Antenna Array Based on Double-Layer Double-Row Spoof Surface Plasmon Polariton

A wide-angle scanning leaky-wave antenna based on double-layer double-row (DLDR) spoof surface plasmon polariton (SSPP) is presented. The designed periodic SSPP with double-layer glide-symmetry can convert slow-wavemode into fast-wave to realize dual-beam radiation. The double-row zipper-shaped structure functions as a binary array, providing endfire radiation and improved gains. The quarter-wave transformers are introduced into SSPP unit cells for suppress the open stopband effect to realize broadside radiation. The measured results indicate that the designed antenna achieve a wide scanning range of 136 degrees (-90 degrees-46 degrees) within the frequency range of 11-26 GHz. The maximum gain of the proposed antenna is 13.1 dBi with a gain fluctuation of 2.8 dB in the entire operation frequency band. The designed antenna not only has a wide-angle scanning including endfire and broadside direction, but also has small gain fluctuations.

Automated summary

A wide-angle scanning leaky-wave antenna based on double-layer double-row spoof surface plasmon polariton (SSPP) is proposed. The antenna utilizes double-layer glide-symmetry periodic SSPP to convert slow-wave mode into fast wave mode and achieve dual-beam radiation. The double-row zipper-shaped structure serves as a binary array for endfire radiation and improved gains. The designed antenna exhibits a wide scanning range of 136 degrees (-90 degrees-46 degrees) within the frequency range of 11-26 GHz, with a maximum gain of 13.1 dBi and gain fluctuation of 2.8 dB.