| Summary: | The Photonic Crystal Cavity (PCC) as a substrate of microstrip patch antenna in Terahertz (THz) frequency has been simulated and analyzed. The objectives are to simulate and analyze the performances changes when the parameters of PCC are varied. THz PCC substrate microstrip antenna is a most simple way to generate the THz frequency. However, they are limited studies that have been done in terms of its fundamental physical analysis. Therefore, this analysis is proposed. Rectangular microstrip patch antenna on 2-D photonic crystal was simulated using electromagnetic simulation CAD Package. The effective permittivity, 2.08 of host material PTFE and copper annealed at 0.6THz.The radius of the via hole and the spacing between are then varied. The performances are monitored through its resonant frequency in Terahertz (THz), S-parameter return loss (S11), gain and radiation pattern. Finally, based on the analysis the good performances of the PCC of low return loss -71.94dB and high gain 9.730dB at R= 9.6μm, while for the second parameter spacing between via at a= 100.1μm the result for the low return loss is -56.56dB and the high gain is 9.726dB. © 2018 IEEE.
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