• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.5
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• pp.163-168
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• 2019

In this paper, We investigated the effects of the transparency variations from 0% to 90.7% on meshed SF-MPAA(Series Fed Microstrip Patch Array Antenna). For this, we designed SF-MPAA in 3 cases that is meshed radiation patches, meshed GND, and meshed radiation patches plus GND. And we investigated the characteristics of SF-MPAA depend on the variations of transparency in each case. In the case of meshed radiation patches, the gain decreased by 18.8% and the operating frequency is lower by 5.5%. In the case of meshed GND, the gain decreased by 15.4% and the operating frequency is lower by 5.56%. In the case of meshed radiation patches plus GND, the gain decreased by 31.94% and the operating frequency is lower by 7.6%. However, the bandwidth and the SLL(Side Lobe Level) did not show apparent tendency on the the variations of transparency.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.69-74
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• 2018

In this paper, We investigated the effects of mesh structure variations of meshed ground on MCAA(Microstrip Comb Array Antenna). First, we designed MCAA in 24GHz ISM band and we investigated the variations of the gain and the SLL(Side Lobe Level) of the MCAA as we varied the mesh structure of the meshed ground. We varied two variables, mesh size and unfilled rato, which is defined as no metal area ratio in mesh for the investigation. We investigated two types of MCAA. Those are flat MCAA composed of flat radiator and tapered MCAA composed of tapered radiator. Both the antenna gains of flat MCAA and tapered MCAA are decreased as the unfilled rato increased. However, increase of mesh size made more dramatic decrease in antenna gain than increase of unfilled rato. The antenna SLL showed similar trend. But tapered MCAA affected more severely by variation of mesh size than flat MCAA.