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Applied Physics 2022
基于类科赫分形方法的多频段天线设计研究
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Abstract:
本文对多频天线展开了研究，采用微带线馈电的方式，通过在矩形环形天线的内部加载类科赫分形结构，设计了一款微带线馈电的三频段微带天线。天线在2.232~2.624 GHz处的相对带宽为16.3%，在4.38~4.98 GHz和5.17~6.89 GHz处的相对带宽分别为12.25%，28.64%，天线的在低频段的最大增益为 2 dB，中高频段的最大增益为4 dB左右。该设计方法具有多频段，小型化，加工简单，成本低等优势；并进行了实物加工和测试，测试数据与理论数据一致。
In this paper, the multi-frequency antenna is studied. A three-band microstrip antenna fed by a microstrip line is designed by loading a Koch-like fractal structure inside the rectangular ring antenna. The relative bandwidth of the antenna is 16.3% at 2.232~2.624 GHz, 12.25% at 4.38~4.98 GHz and 28.64% at 5.17~6.89 GHz respectively. The maximum gain of the antenna in the low-frequency band is 2 dB and that in the medium and high-frequency band is about 4 dB. The design method has the advantages of multi-frequency band, miniaturization, simple processing and low cost; the physical processing and testing are carried out, and the test data are consistent with the theoretical data.
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