Leaky-Wave Antenna Based on Modified Aperture Half-Mode Substrate Integrated Waveguide

In this paper, we will introduce a novel leaky-wave antenna based on the half-mode substrate integrated waveguide. By modifying the aperture of the proposed antenna, the side-lobe level of the radiation pattern in the E-plane is reduced up to -19 dB. The operating band of the antenna is from 27 to 29 GHz that is one of the allocated 5G bands. The radiation efficiency is increased to 53 % by partial removal of the dielectric layer that leads to the reduction of the scanning speed. Hence, the frequency sensitivity of the radiation pattern decreases. The length, width, and height of the antenna are 70mm, 11.5mm, and 0.127mm, respectively. The small size of the antenna makes it a suitable candidate for circuit integration.