The influence of hole-truncated to characteristic performance of the equilateral triangular antenna for mobile satellite communications

摘要

The previous single element antenna was made of two separated layers, one for the patch antenna (upper) and the other for the feed-line (below), using proximity feed for a thin configuration. In this time, a novel dual feed antenna with a hole-truncated is proposed for the generation of a compact LHCP (Left Handed Circular Polarization) using a compact equilateral triangular-patch antenna, that one of the microstrip-line feeds is longer than the other for introducing a 90° phase delay. The influence of the hole-truncated that embedded on the patch is investigated to make the patch antenna smaller than the previous antenna. The method of moments (IE3D Zeland Software) is used considering a finite ground analysis. The simulation results show that the patch length decreases by 12.65 % (a = 52.80 mm to a = 46.12 mm) with a gain and axial ratio at 2.5025 GHz being 6.82 dBic and 0.66 dB, respectively. The bandwidth of the hole-truncated antenna, by comparison of the previous antenna is smaller.