Load Study Of The Frequency Selective Surface

The paper consists of study of passive frequency selective surfaces (FSS)and study of active FSS, This dissertation focuses on convoluted slot loop FSS and active square loop FSS,The numerical simulation and the design and fabrication of FSS have been carried out. The main contributions of this dissertation are listed as following:1. The performance of convoluted dipole FSS has been analyzed, convoluted slot loop FSS is proposed in the paper. Based on the theoretical research, An 2.45 GHz FSS with such structures is designed and fabricated, Simulation and experimental results indicate that the dimension of the loaded FSS can be miniaturized greatlyin comparison with the traditional FSS. As the angle of incidence increases from 0°to 45°, resonance frequency is with no shift. Convoluted slot loop FSS is planar and need not wielding in comparison with the traditional FSS.2. Based on the structure of convoluted slot loop, a dual-band FSS of 1.8GHz and 2.46GHz is designed and fabricated. Simulation and experimental results indicate that the dimension of the FSS can be miniaturized in comparison with the traditional FSS. Besides, the performances of dual-band FSS are not sensitive to the angle of incidence and achieve dual-band resonance on one layer of dielectric superstate3. The performance of square loop FSS loaded with diodes has been analyzed, and a 2.167 GHz FSS with such structures is designed and fabricated. Simulation and experimental results indicate that the resonance frequency of the loaded FSS can be electronically controlled. This active FSS design enables transmission to be switched on or off at 2.167 GHz, providing high transmission when the diodes are in OFF state, and high isolation when the diodes are ON...