64元宽带高增益低副瓣毫米波天线阵的设计

Design of Broadband High-gain and Low Side Lobe of 64 elements' Millimeter Wave Antenna Array

设计了一种64元阵列天线。该天线E面采用泰勒阵列理论来降低副瓣,但普通泰勒阵采用的是中间馈电方式,而且阵元间距固定为一个波长,文章采用边缘馈电方式和可变阵元间距的方法设计了一种新型的泰勒阵列。这种阵列不仅很好的降低了副瓣而且很容易实现角度偏转,文章设计的泰勒阵可以实现32°的偏转角。采用功分馈电网络同相馈电,设计了一种8×8的阵列天线,其增益达到了19.7 dB,阻抗带宽(VSWR≤2)达到了16.56%。

A 64-element array antenna is designed. It uses Taylor distribution to reduce the side lobe of the E plane. But it is different from the ordinary Taylor distribution array antenna which feeding at the middle of the array and using the fixed element spacing. The new Taylor distribution array antenna feeds at the edge of the array and the spacing between the elements can be changed which are easy to realize antenna＇s low side lobe and deflection of the angle. The simulated radiation patterns show that the maximum radiation at about 32~ from the axis perpendicular to the axis of the array. A 8× 8 array antenna is designed using the divider network feeding in the same phase . The Relative bandwidth impedance bard width （VSWR≤2） is 16.88%, and the gain is 19.6 dB.