Symmetric periodic leaky‐wave antenna for open stopband suppression

Abstract

AbstractIn this work, a novel symmetric periodic leaky‐wave antenna is proposed for open stopband suppression. The unit cell of the proposed antenna consists of an H‐shaped ring as the leakage element. Using L–C circuit analysis, it is shown that the open stopband is effectively eliminated by optimizing the H‐shaped ring. A prototype is fabricated to verify the simulated results. The antenna radiates in the broadside direction at 7.9 GHz. The impedance bandwidth corresponding to the n = −1 space harmonic ranges between 5.7 and 11 GHz.