Symmetric periodic leaky‐wave antenna for open stopband suppression

Abstract

In 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.

Printed leaky‐wave antenna with stable gain and reduced cross polarization

“…Some linearly polarized leaky wave antennas are described in Kumar and colleagues. [12][13][14][15][16][17][18][19][20][21][22][23][24] But these antennas do not have sufficiently low cross polarization level. Thus, scope is there to design a LWA with stable gain and reduced cross polarization.…”

“…The cross polarization level of a linearly polarized antenna should be as low as possible. Some linearly polarized leaky wave antennas are described in Kumar and colleagues 12–24 . But these antennas do not have sufficiently low cross polarization level.…”