【摘要】 为减小空中微波辐射场测量时极化失配带来的影响,设计了一种低轴比微带圆极化阵列天线,该天线在9. 7 GHz,3 dB波束宽度约45°,轴比低至0. 1 dB。天线功率容量大于1. 5 k W,常温(26℃)和低温(-6℃)时天线轴比偏差小于0. 1 dB。应用该天线可以将极化失配不确定度减小到0. 1 dB以内,并具有较强的环境适应性,适用于X波段空中辐射场精确测量。更多还原

【Abstract】 A microstrip circularly polarized array antenna with low axial ratio was designed to decrease the measurement uncertainty caused by polarization mismatch. The 3 dB beam width of the antenna was about 45° at 9. 7 GHz,the axial ratio was as low as 0. 1 dB at 9. 7 GHz. The antenna power capacity was greater than 1. 5 k W,and the axial ratio deviation was less than 0. 1 dB between temperature of 26 ℃ and-6 ℃ . With this antenna,the uncertainty of polarization mismatch can be reduced to less than 0. 1 dB. It has strong environmental adaptability and it is suitable for accurate measurement of X-band airborne radiation field.更多还原