Design of 0.22 THz twodimensional electromagnetic bandgap waveguide and array antenna

Based on twodimensional electromagnetic bandgap (2D EBG) structure, both straight and 90curving waveguide transmission lines working at 0.22 THz were designed. The numerical simulation result shows that the S21 parameters of straight and curving waveguides are both above 10-5 dB at 0.22 THz, they are above -0.001 dB and -0.003 5 dB respectively in the 20 GHz simulation frequency band, and the bandgap has good inhibition to the electromagnetic wave. Based on the EBG waveguide, 3 dB power divider and H plane horn array antenna were designed. Their numerical simulation result shows that the S21 parameter of the power divider is -3 dB at 0.14 THz, the array antenna has the directivity of 17.1 dBi with small side and back lobe, and both E plane and H plane patterns are symmetrical.