Reducing Side-Lobe Level of Surface Mounted Printed Leaky-Wave Antenna

A novel method for suppressing the undesired radiation of the feed section is introduced. Implementing the proposed method results in the side-lobe level reduction. To validate the proposed approach, we designed a leaky-wave antenna using the novel feed section. The antenna is realized based on the substrate integrated waveguide. The operating frequency is chosen as 28.5 GHz in the support of modern 5G wireless networks. The length, width, and height of the antenna arc 110 mm, 31 mm, and 1.3 mm, respectively. Ease of fabrication, efficiency, and adoptability of the proposed method make it a suitable candidate for suppressing the unwanted radiation from the feed section of the printed antennas.