volume | PIER Journals

Abstract

In this paper, a novel miniaturized circularly polarized (CP) antenna is proposed for use in B3 band of Compass Navigation Satellite System (CNSS). The primary radiator is a hexagon patch with four bending strips. A shorting pin is loaded with each strip to miniaturize the dimension of the proposed antenna, which achieves a small electrical size of 0.11λ×0.11λ×0.068λ (λ being the wave-length in free space at 1.268 GHz). In order to improve the bandwidth, Y-shaped coupled patches and bending-strips, which act as reactive loading are coupled to an octagon patch. Four coupled bending-stubs with same turning directions of bending-strips, are sequentially placed at the edge of the octagon patch to enhance CP performance. Finally, a prototype of the antenna is implemented and measured. The experimental results reveal that the proposed antenna achieves impedance bandwidth (IBW) of 19.6% (1.175-1.430 GHz) for |S₁₁|≤-10 dB and 3-dB axial-ratio bandwidths (ARBW) of 27.5% (1.000-1.320 GHz). The radiation efficiency is more than 75%, and the gain keeps above 1.98 dBic over the B3 band. Thus, the proposed antenna can be a good candidate for the applications of CNSS.

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Dr. Li Wang

Dr. Rui Zhang

Dr. Chang Liang Zhao

Dr. Xi Chen

Dr. Guang Fu

Professor Xiao-Wei Shi