A5101994811- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Turbomachinery Performance and Optimization
- Combustion and flame dynamics
- Heat Transfer Mechanisms
Zhejiang Energy Group (China)
2021
Xijing University
2018
Metasurfaces offer a convenient means to control the polarization state of light. Converting linear (LP) and maintaining circular (CP) in reflection mode have been widely realized, but these two types not achieved using single metasurface. This article reports an anisotropic metasurface that allows both multiband LP conversion CP-maintaining reflection, due anisotropy metamaterial's unit cell. system facilitates ultrawide-band converters for $e.g.$ antennas, wireless communication, radar technology.
We propose a metasurface which consists of three conductive layers separated by two dielectric layers. Each layer square array loop apertures, however, pair corners each metal patch surrounded the apertures have been truncated, so it becomes an orthotropic structure with mutually perpendicular symmetric axes u and v. The simulated results show that can be used as wideband transmission-type polarization converter to realize linear-to-circular conversion in frequency range from 12.21 GHz 18.39...
Abstract In this work, a varactor‐tunable frequency selective surface (FSS) is proposed; it based on common FSS composed of annular ring slot cells, in which four varactors are loaded each to dynamically tune its resonant real time. addition, an appropriate embedded bias network added introduce same direct current voltage for varactor. Numerical simulations demonstrate that the resonant‐frequency proposed can be tuned over 77.2% wide range from 2.73 6.16 GHz by altering capacitance 1.0 0.1...
Abstract A multi-objective, aerodynamic optimization of the last stage turbine blade an 100Hz industrial gas is presented. We aim at maximizing stage’s efficiency, while same time meeting mechanical integrity. The procedure was build, during process mass flow rate and meridian were kept constant to obtain required loading without changing operating point. optimized geometry are chosen taking into account constraints as well constrains, such centrifugal stress bending stress. SST turbulence...