基于SIW的宽角度波束扫描CPW-CTS天线阵设计  

Design of abeam scanning CPW-CTS array based on SIW with broad angle range

作　　者：于英杰 杨雪霞[1] 楼天 邱厚童 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电子测量技术》2017年第10期42-46,共5页Electronic Measurement Technology

摘　　要：本文基于基片集成波导(substrate integrated waveguide,SIW)提出了一种具有宽扫描角度的连续横向枝节(continuous transverse stub,CTS)频扫天线阵。沿纵向周期排列在共面波导馈线(coplanar waveguide,CPW)上的SIW结构CTS阵列向空间辐射电磁波。提出一种新型宽带CPW慢波结构作为天线阵的馈线,用以增大相邻天线单元之间的相位差,在8.6~13.7GHz频带内,相位变化范围在89.3°^-83.3°,从而使天线阵主波束随频率实现大范围扫描。为了减少天线阵的后向辐射,在其背面1/4波长处加反射板。设计了一个4元SIW结构CPW-CTS天线阵,利用全波仿真软件HFSS进行了分析。结果表明,在8.6~14GHz频带内天线阵反射系数小于-10dB,随频率增大实现E面-40°~56°的扫描,在各方向上的最大增益在9.8~12.3dBi。This paper presents a broadband continuous transverse stub（CTS）antenna array with wide scanning range based on substrate integrated waveguide（SIW）.The SIW-CTSs radiators are periodically arranged on the coplanar waveguide（CPW）.A novel broadband CPW slow-wave structure is proposed as the feedline to increase the phase difference of the adjacent antenna elements.Depending the phase variation from 89.3°to-83.3°within the frequency range of 8.6~13.7 GHz,a wide beam steering range depending on frequency is achieved.A reflector is located at onefourth wavelength away from the antenna array to reduce the backward radiation.A 4-element CPW-CTS antenna array based on SIW is designed and simulated using the HFSS full-wave analysis software.The simulated results show that the frequency range of the reflection coefficient less than-10 dB is 8.6~14 GHz.The main beam of the antenna is scanned from-40°to 56°in E-plane with the frequency increasing.At every main radiation direction,the gain varies within the range of 9.8 ~ 12.3 dBi.

关 键 词：连续横向枝节(CTS) 天线阵 波束扫描 宽带 基片集成波导(SIW) 共面波导(CPW) 

分 类 号：TN713[电子电信—电路与系统]