A novel two-dimensional (2D) square lattice Electromagnetic Bandgap (EBG) structure, including EBG waveguide
transmission line, quarter turn, and power-divider, operated at the center frequency of 0.5THz is proposed. Finite
element method (FEM) was used to analyze and simulate the EBG structure and these components based on EBG. These
components were also compared with traditional ones. Simulation and analysis results show that when the radius of
Si-wire satisfied the condition: R = 0.4a , where a is the lattice constant, the insertion loss and voltage standing wave
ratio (VSWR) of EBG waveguide transmission line and quarter turn are less than -0.05 dB/mm and 1.1, respectively.
Meanwhile, the asymmetric division ratio of power divider is better than 0.1 dB. The square lattice has unique
advantages in the waveguide transmission line design. The 2D EBG structure can be achieved by using poly-silicon
based on MEMS technology with benefits of low loss, planar structures, and high processing accuracy. In addition, it is
also easy to integrate with other devices and circuits, such as antennas, filters, diodes, mixers and so on. Hence, this
novel EBG structure should have many applications for THz passive components, feed system of antenna array, and
integration with other MMIC devices.