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Air Gap Effect on Antenna Characteristics of Slitline and Stripline Dipoles on an Extended Hemispherical Lens Substrate


Truong Khang Nguyen and Huy Hung Tran*

Source title: 
The Applied Computational Electromagnetics Society (ACES), 33(9): 1018-1025, 2018 (ISI)
Academic year of acceptance: 

This paper presents the effect of an air gap introduced between a planar feed and an extended hemispherical lens on the antenna's impedance, current distribution and radiation characteristics. Two selected planar feeds for study are slitline dipole and stripline dipole. The results showed that as a small gap is introduced, the input impedance of the slitline dipole was almost remained unchanged while that of the stripline dipole was changed remarkably. More importantly, the boresight gain and radiation efficiency of the slitline dipole was improved whereas those of the stripline dipole were degraded with the presence of this air gap. An overall performance comparison for these two designs will be detailed in the paper. This study provides useful guidelines of choosing the proper feed for THz integrated lens antenna applications, especially for indoor THz communication applications such as wireless local area networks and wireless personal area networks in the 300 GHz band.