Abstract

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 <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">on</small> and <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> , 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.

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