基于基片集成波导的Ka波段毫米波缝隙天线设计
Design of Ka-band Millimeter-wave Slot Antenna Based on Substrate-integrated Waveguide
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摘要: 本文总结了由基片集成波导(SIW)设计缝隙天线的一般方法,并设计了一款 8×8 SIW 缝隙天线阵列。 该天线主要由SIW 馈电网络、缝隙阵列和微带线至SIW 转换器三部分构成。 利用泰勒分布函数控制阵列的馈电幅度以及缝隙的偏置距离,从而有效地控制了阵列在方位面和俯仰面的旁瓣电平。 实验结果表明,该天线在 33. 30 GHz ~ 36. 54 GHz 的频带范围内 S11 幅值小于-10 dB,相对带宽为 9. 3%。 天线最大增益为 18. 56 dB,H 面副瓣电平小于-20 dB,E 面副瓣电平小于-18 dB。 该天线剖面低,易于共形,在机载、弹载等场景中有较好的应用前景。Abstract: The general method of slot antenna designed by substrate integrated waveguide ( SIW) is summarized and an 8×8 SIW slot antenna array is designed in this paper. The antenna is mainly composed of three parts: SIW feed network, slot array an-tenna and microstrip line to SIW converter. The feeding amplitude of the array and the offset distance of the slot are controlled by Taylor distribution function, so that the sidelobe levels of the array in the azimuth and elevation planes are effectively controlled. The experimental results show that the amplitude of S11 of the antenna is less than -10 dB in the frequency range of 33. 30 GHz~36. 54 GHz, and the relative bandwidth is 9. 3%. The maximum gain of the antenna is 18. 56 dB, the sidelobe level of the H plane is less than -20 dB, and the sidelobe level of the E plane is less than -18 dB. The antenna has a low profile and is easy to con-form, so it has a good application prospect in airborne, missile-borne and other scenarios.
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