Abstract
A wideband magneto-electric antenna is proposed for through-the-wall imaging radar (TWIR) applications in the frequency range 1.5–2.5 GHz. A rectangular cavity is introduced to improve the total gain and the front-to-back ratio (FBR) of the antenna. The through-the-wall imaging (TTWI) performance of the proposed antenna aimed to detect stationary targets has been investigated and compared with a conventional Vivaldi antenna. The results obtained by numerical simulations and processed by the back projection (BP) algorithm show that, compared with the Vivaldi antenna, the proposed antenna can not only detect the desired target, but also eliminate the effect of the undesired back objects, making it a promising candidate for TWIRs.
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