2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) | 2021
Low-Profile Electronic Beam-Scanning Leaky-Wave Antenna Composed of Longitudinal Cells
Abstract
A novel electronic beam-scanning leaky-wave antenna (LWA) is presented in this paper. The proposed LWA was realized on a low-profile substrate integrated waveguide (SIW). Integrating varactor diodes into the ground plane and sweeping their capacitances leads to variations in the propagation constant and main-beam pointing angle. The center frequency was chosen as 27.8 GHz to accommodate 5G mm-wave applications. The length, width, and thickness of the LWA are 148 mm, 24 mm, and 0.127 mm, respectively. Sweeping the varactor diodes’ capacitance leads to a 16° beam-scanning range with a peak realized gain of 8.2 ± 0.2 dBi at 27.8 GHz. The low-profile, small gain variation, electronic beam-scanning, and medium gain are among the features of the proposed LWA that make it a suitable candidate for 5G beam-scanning applications.