Electronic Beam Scanning Leaky-Wave Antenna Based on Delta Shape Half-Mode Substrate Integrated Waveguide

A novel reconfigurable leaky-wave antenna is presented in this paper. The proposed antenna is based on a half-mode substrate integrated waveguide. The beam-steering is achieved using novel cells. The effective surface impedance can be changed by configuring the cells. Sweeping the bias voltage causes variations of the phase constant which leads to electronic beam-scanning. The operating frequency is chosen as 28.5 GHz in the support of upcoming 5G communications systems. The length, width, and height of the antenna are 67 mm, 45 mm, and 0.3 mm, respectively. To achieve an optimal response, cells are located in the delta configuration. Electronic beam-scanning capability, compactness, and high gain of the proposed antenna make it a suitable candidate for future 5G wireless networks.