W. Miao, F. Dauplay, Y. Delorme, J. Baubert, G. Beaudin, S. Shi
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Simulation of a Membrane Based Quasi-Optical Antenna at 2.5 THz
In this paper, we present a simulation on the radiation pattern and return loss of a membrane based quasi optical antenna at 2.5 THz. The integrated antenna consists of a planar twin slot antenna, a metallic back reflector and a parabolic mirror. We firstly optimized the parameters of the planar twin slot antenna by using the commercial package CST Microwave Studio (finite integration technique) and then validated the optimized results with two other commercial packages Ansoft HFSS (finite element method) and EMSS FEKO (method of moment). The effect of the parabolic mirror to the entire integrated antenna is also analyzed with FEKO by using the ray tracing approximation of physical optics. A near Gaussian beam with an HPBW of 2.55 degree and a side lobe level of -22 dB is obtained when the focal length of the parabolic mirror is optimized.
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