SIW Leaky-Wave Antenna with Zirconia Ceramic Block for Suppressing the Open Stopband

Abstract

In this paper, a period substrate integrated waveguide (SIW) leaky-wave antenna (LWA) with a continuous beam-scanning capability is proposed. Structure of the transverse slot stacked by zirconia ceramic block (ZCB) is periodically loaded in each unit cell of the LWA. For the ZCB functioning as a dielectric resonator, another resonant network is introduced to the origin equivalent circuit. We then change the dimensions of the ZCB to make the unit cell's reactance component to be zero at broadside frequency, as a result, the open stopband is successfully suppressed.