基于人工表面等离子体激元的毫米波高扫描率四波束漏波天线

In order to enhance the multi-object detecting and tracking capability，a four-beam millimeter wave frequency scanning leaky wave antenna (LWA) based on spoof surface plasmon polaritons (SSPP) has been proposed. According to the theory of sinusoidally modulated reactance superposing surface (SMRSS)，Quad-beam LWA is realized by etching periodical slots on the top surface of substrate integrated waveguide (SIW)，and uniform slots etched on the bottom layer is used to eliminate the open-stopband effect. The measurement shows that the four beams can scan from -52° to 22° within the frequency band from 29 GHz to 30. 2 GHz，achieving a total of 74° scanning range，and the beam scanning is up to 18°/%BW，which not only saves the spectrum source but improvs the multi-target detection efficiency.