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Abstract

Based on the electromagnetic properties of complementary split ring resonator (CSRR), a novel artificial magnetic conductor (AMC), CSRR-AMC, is designed. The comparison of the reflection phase with square patch AMC reveals its features of miniaturization and multiband in-phase reflection, under X- and Y-polarized normal incident waves, respectively. Inspired by the reflection phase difference under different incident conditions, we have designed a wideband low rader cross-section (RCS) reflection screen with a single CSRR-AMC structure. The CSRR-AMC arrays are orthogonally positioned and the backscattering energy is reduced as a result of phase cancellation. Measured results demonstrate that -10dB RCS reduction is achieved in a wide frequency range of 7.38–10.47 GHz and the relative bandwidth is 34.6%, providing a new method for the design of wideband low scattering structure.

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1.
Funds:Project supported by the National Natural Science Foundation of China(Grant Nos. 60671001, 61271100), the Key Program of Natural Science Basic Research of Shanxi Province, China (Grant No. 2010JZ010), and the Natural Science Basic Research of Shanxi Province, China (Grant Nos. SJ08-ZT06, 2012JM8003).

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Vol. 62, Issue 15 - 2013-08-05

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