Phase Switched Screen for Radar Cloaking Based on Reconfigurable Artificial Magnetic Conductor

Phase switched screen (PSS) has been proposed for more than two decades for its applications on radar cloaking. However, the PSSs in most publications need a thickness of one-quarter wavelength to realize perfect cloaking at the operating frequency of the incident radar-detecting wave, which seems too thick for engineering. In this article, a new design of the dual-band artificial magnetic conductor (AMC) is proposed in which the electromagnetic band gaps are shifted among two bands by adjusting the biasing current on the four p-i-n diodes. By controlling the states of the diodes between
on
and
off
, the in-phase reflection frequency of the AMC can switch from 2.5 to 5.3 GHz. Based on the AMC structure above, a potential dual-band PSS is realized through different switching schemes and, therefore, achieves good stealth effects during the two bands above.