Design and Analysis of Multiband Energy Selective Surface Based on Semiconductors
Ning Hu, Song Zha, Tao Tian, Peiguo Liu
Abstract
This article presents how to design multiband energy selective surface (ESS), which has a nonlinear transmission response to the power of incidence in multiple frequency band. It is demonstrated that ESSs with an arbitrary number of operating bands could be obtained with both parallel and serial LC resonance circuits and each single operating band could be modulated from a passband with low insertion loss (IL) to a stopband with high shielding effectiveness (SE). Furthermore, a dual-band ESS is designed to verify the proposed methods, in which two rectangular resonance rings mounted with Sckotty diodes are used. A 0.5 IL and 30 dB SE are observed at the central frequency of both operating bands with ECM and full-wave simulations. Prototypes are fabricated and measured with a waveguide set-up. There is a good agreement between the simulations and measurements under low-power incidence. However, some differences are observed under high-power incidence. The reason behind is discussed in detail and some measures for improvement are also proposed. The proposed approach provides general guidelines for multiband ESS design and is supposed to obtain wide use in adaptive shielding for high power microwave (HPM).