一种Ka频段圆极化宽波束天线设计

Design of a Ka-band Circularly-polarized Wide-beam Antenna

文章针对常规频段越来越拥挤的频谱问题,突破思维定式,超越常规频段,设计了一种Ka频段圆极化宽波束天线。该天线主体辐射结构为单馈点圆极化方形贴片微带天线,并通过金属腔体扩展辐射波束。对天线的电性能进行了仿真分析,仿真结果表明:天线在29.5CHz~30.5CHz范围内电压驻波比小于2,在典型频点值30GHz下辐射右旋圆极化波,可以提高天线的抗干扰能力和接收信号的能力,天线的3dB波束宽度大于等于130°,是常规天线3dB波束宽度的两倍,可以在极广空域内辐射接收能量。

In response to the increasingly crowded spectrum problem in the conventional frequency band,the article breaks through the mindset and goes beyond the conventional frequency band to design a Ka-band circularly-polarized wide-beam antenna.The main radiation structure of the antenna is a single-feed circularly-polar-ized square patch microstrip antenna,and the radiation beam is extended through a metal cavity.The electrical performance of the the antenna was simulated and analyzed.The simulation results show that the voltage-stand-ing-wave-ratio of the antenna is less than 2 in the range of 29.5 GHz to 30.5 GHz,and it radiates right-handed circularly-polarized waves at a typical frequency value of 30 GHz,which can improve the antennas anti-interference ability and signal reception ability.The 3 dB beam width of the antenna is greater than or equal to 130°,which is twice the 3 dB beam width of a conventional antenna,and can radiate and receive energy in an extremely wide airspace.