ABSTRACT A new low profile broadband directional spiral antenna design on a planar EBG structure is introduced which is suitable for aircraft structural integration. The proposed antenna has the (greater than 4 dBiC) gain and axial ratio (less than 3-dB) bandwidth of 400–800 MHz (except for a narrow frequency range of 505–530 MHz) within a total thickness of one tenth of the wavelength. Meausured peak gain is 7.5 dBiC while gain at 400 and 500 MHz are 6 and 7.2 dBiC, respectively. Abbreviations: EBG: Electromagnetic Bandgap; HIS: High Impedance Surface; SATCOM: Satellite Communications; UHF: Ultra High Frequency; CP: Circularly Polarized; BW: Bandwidth; AR: Axial Ratio

中文翻译：

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基于EBG结构的宽带定向圆极化螺旋天线

摘要介绍了一种适用于飞机结构集成的平面EBG结构上的新型低剖面宽带定向螺旋天线设计。建议的天线具有（大于 4 dBiC）增益和轴比（小于 3-dB）带宽为 400-800 MHz（除了 505-530 MHz 的窄频率范围外），总厚度为波长。测得的峰值增益为 7.5 dBiC，而 400 和 500 MHz 下的增益分别为 6 和 7.2 dBiC。缩写：EBG：电磁带隙；HIS：高阻抗表面；SATCOM：卫星通信；UHF：超高频；CP：圆极化；BW：带宽；AR：轴向比