This paper presents a novel approach to the design of a 4×4 slot array antenna operating at 5.8 GHz,utilizing a slot element based on the Koch Snowflake hexagonal fractal structure. The antenna is fed by a parallel feeding network,resulting in characteristics of high directivity. The proposed design was experimentally validated through fabrication and testing. Measurement results indicate a 5.7％ impedance bandwidth (5.56～5.89 GHz) with well-matched impedance. At the operating frequency,the antenna exhibits commendable directional radiation characteristics and stable gain,achieving a peak gain of 19.85 dBi and a corresponding aperture efficiency of 80.69％. Moreover,the 3-dB gain bandwidth extends to 18.40％ (5.13～6.20 GHz),demonstrating the efficacy of the Koch Snowflake fractal structure in enhancing the performance of slot array antennas.
关键词
平面阵列天线/Koch雪花分形/并行馈电/高增益
Key words
planar array antenna/Koch snowflake fractal/broadband/high gain
维普
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