宽频带膜片激励波导窄边非倾斜缝隙阵天线  

A Broadband Untilted Edge-slotted Waveguide Antenna Array Excited by Shaped Slabs

作　　者：汪伟[1,2] 金剑[2] 钟顺时[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072 [2]华东电子工程研究所,合肥230031

出　　处：《微波学报》2005年第5期30-33,45,共5页Journal of Microwaves

摘　　要：文中提出一种新型宽频带低交叉极化的波导缝隙线阵设计,辐射单元是由波导内膜片激励的窄边非倾斜缝隙,线阵划分成多个子阵,并由功分器馈电。设计、加工了一个16单元X波段的均匀直线波导缝隙阵,测试得到7.2%阻抗带宽(VSWR≤1.5),天线辐射方向图最高副瓣电平低于-11.8 dB,并且具有低于-39 dB的交叉极化特性。A novel untihed edge-slotted waveguide antenna array with wide bandwidth and very low cross-polarization is presented, where the radiating element is composed of an untihed narrow-wall slot and a pair of shaped slabs flanked the slot in waveguide. The array is separated into several subarrays and fed by a power divider. A uniformly excited, equally spaced linear array with 16 proposed elements for X-band application is designed and measured. Experimental results show that the antenna has an excellent cross-polarization level of ≤- 39dB, a sidelobe level of ≤ - 11.8dB and over 7.2% bandwidth for VSWR ≤ 1.5.

关 键 词：波导缝隙阵天线 极化 带宽 缝隙阵天线 波导缝隙 宽频带 激励 膜片 辐射单元 辐射方向图 

分 类 号：TN822[电子电信—信息与通信工程]