参量阵电控波束偏转方法研究与实验测试  

The method research and experimental tests on electronically controlled beam steering for parametric array

作　　者：张富东[1] 徐利梅[1] 陈敏[1] 李学生[1] 

机构地区：[1]电子科技大学航空航天学院,成都611731

出　　处：《应用声学》2016年第3期239-247,共9页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(61271286;61301261);装备预研基金项目(9140A01010113DZ02001;9140A01060114DZ02001)

摘　　要：为了使参量阵获得更快的波束转动能力,提出了一种基于相控阵技术的电控波束偏转方法。该方法通过同步改变原波波束的空间分布,间接实现了参量阵差频波束的电控偏转。通过仿真发现,较低的原波频率、较大的原波频率差异、较小的阵元间距和原波波长比值d/λ,是在波束偏转时减小差频波主瓣宽度和栅瓣强度的有利条件。随后采用所提方法,对频率为2 kHz的差频波,完成了偏转角为5°、10°与20°时的波束偏转实验。实验生成的差频波主瓣分布在预设方向,栅瓣同时也得到了有效的抑制,达到了波束偏转的目的。Based on the phased array technology, an electronically controlled beam steering method is pro- posed for parametric array to make it gain a faster beam-steering ability. Through the simulation analyses, it is found that, the lower frequency for primary waves, the bigger frequency difference among primary waves, the smaller array elements spacing, and the lower value of d/）~ （the ratio of array element spacing to primary wave＇s wavelength）, are the benefit conditions for difference frequency wave to acquire a narrower main-lobe and weaker grating lobe in the beam steering process. Based on the proposed method, beam-steering exper- iments for difference frequency wave with the frequency of 2 kHz were carried out at the steering angles of 5~, 10~ and 20~. The generated difference frequency waves were consistent with the presets at the main-lobe locations, and its grating lobes were also inhibited as the expected. The purpose of the difference frequency wave beam steering was achieved.

关 键 词：参量阵 波束偏转 原波 差频波 

分 类 号：TN64[电子电信—电路与系统]