一种新型微带天线及其宽角扫描特性研究

该文主要描述了一种适合宽角扫描的相控阵天线单元设计思路,研究了其组阵实现宽角扫描的特性。为尽量减少大角度扫描过程中由于天线单元波束宽度有限带来的阵列增益下降,采用折叠地板的方式展宽天线单元半功率波束宽度;同时,为了降低互耦引起的天线单元方向图畸变,在宽波束设计基础上探索了降低天线互耦的方法,使得真实阵列方向图尽可能地满足方向图乘积定理,从而实现宽角、高增益扫描的目的。经一维线阵的仿真和测试,设计了一种能扫描到±70°且增益变化不大的宽角扫描阵列。设计的天线还能作为一种典型的天线单元,应用于5G等民用消费电子场景。

Design of a Low Mutual CouplingWide Beam Microstrip Antenna

This paper introduces a novel idea for designing a phase array microstrip antenna element with low coupling and wide beam scan capabilities. Consisted of two-layers patches separated by an air gap and fold grounds, the proposed antenna element has a simple structure. In order to minimize the array gain drop due to the limited antenna beam width, the proposed antenna is designed to expand the half-power beam width as far as possible with fold grounds structure. At the same time, in order to reduce the distortion of antenna element pattern caused by mutual coupling, some methods are proposed for reducing the mutual coupling to make sure satisfy the product theorem of antenna pattern as much as possible. Moreover, a prototype of the proposed antenna and a linear array are fabricated and measured. The measured results show that the wide angle scanning array is capable of scanning up to ± 70° along with stable gain characteristics. Meanwhile, the proposed antenna is a classical antenna which can be used for 5G applications ranging from infotainment solutions to consumer devices.