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This paper presents a design of broadband metamaterial absorbers based on spatially dispersive split ring resonators (SRRs). Because of negative permeability of SRRs, magnetic surface plasmons (SPs) are realized based on SRRs for s-polarized waves. And then, by spatially dispersion engineering, a serially structure of SRRs with heights variation is designed to realize a broadband absorber. The simulation...
Spoof Surface Plasmon Polaritons (SSPPs) have shown many significant practical applications for new waveguide and devices in microwave frequency range. For these practical applications, it requires efficient conversion between spoof surface plasmon polaritons and guided waves when feeding energies into and extracting signals from functional plasmonic waveguides or devices. In this work, a smooth bridge...
A linear polarized (LP) endfire antenna based on spoof surface plasmon polaritons (SSPP) is proposed, which is composed of a feed monopole and ultrathin corrugated metallic strips. The metallic strips are utilized to couple guided wave into SSPP, propagate SSPP, and radiate the SSPP into free space. As an example, an X-band prototype is designed, fabricated, and measured. Both the simulated and measured...
Wireless link has need of an omnidirectional antenna like dipole, but with higher gains. Of course, there is no way of achieving both of them simultaneously. To solve this contradiction, we propose to design multibeam antennas, which divide the radiation pattern of omnidirectional antennas into several beams. The antenna, based on spoof surface plasmon polaritons (SSPPs) mode coupling, consists of...
High-efficiency modulation of free-space EM waves owns wide application values in microwave devices, antennas, radomes, stealth technologies, etc. In this paper, we present a brief review on the work of our group on high-efficiency free-space wave modulation based on the excitation of spoof surface plasmon polaritons. The physical mechanism is presented briefly for free-space wave modulation based...
High quality factor resonances play a significant role in sensor technology. We excite shape trapped-mode resonances in polarization conversion metasurfaces (PCMs) by introducing resonance cavities gaped by two split elliptical ring resonators (SERRs). The quality factor of the resonances can achieve 370.75, and the resonances are angle-independent and polarization independent. Moreover, the resonance...
We propose a ultra-wideband polarization conversion metasurface composed of copper sheet-backed asymmetric V-shaped resonators. The ultra-wideband polarization convertibility is resulted from multiple resonances of the V-shaped resonators. The simulation results show that the polarization conversion ratio (PCR) is nearly 100% for both x-and y-polarized normally incident EM waves at the four resonance...
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