Broadband SIW Traveling Wave Antenna Array for Terahertz Applications

A substrate integrated waveguide (SIW) traveling wave antenna with single element was proposed in this paper using novel configuration. This novel configuration is then used to construct a two-way 1 × 2 linear antenna array feed by Y-junction SIW power divider for Terahertz applications. The radiation pattern, gain and return loss were analyzed. We used Rogers RT5880 substrate which has a relative permittivity of 2.2 for construct the antenna array. Microstrip to SIW transition is used to provide smooth transition between the structures. The simulation results obtained by CST simulator show that the 1 × 2 antenna array operated in the range 0.135–0.205 THz with an average gain is about of 8 dBi and the lower return loss is about of −45 dB. The proposed antenna array is featured by low size, wideband and high gain which make it a good component for Terahertz applications.