一种基于氧化锆陶瓷的宽带圆极化双环天线  

A wideband circularly polarized dual-loop antenna based on zirconia ceramic

作　　者：郑闻 王诗言 范飞 景为鉴 李涵玥 华依琳 李银 ZHENG Wen;WANG Shiyan;FAN Fei;JING Weijian;LI Hanyue;HUA Yilin;LI Yin(School of Electrical and Automation Engineering,Nanjing Normal University,Nanjing 210046,China;Department of Broadband Communication,Peng Cheng Laboratory,Shenzhen 518052,China)

机构地区：[1]南京师范大学电气与自动化工程学院,南京210046 [2]鹏城实验室宽带通信研究部,深圳518052

出　　处：《空间电子技术》2022年第6期55-60,共6页Space Electronic Technology

基　　金：国家自然科学基金(编号:62101271);江苏省自然科学基金(编号:BK20210557)。

摘　　要：随着射频系统工作频率的不断提高,介质天线因不受导体损耗影响而备受关注。基于高介电常数介质波导在其高次模截止区的漏波辐射以及陶瓷三维打印技术,提出了一种宽带圆极化双环介质天线。相比于同样是工作于行波模式的金属宽带圆极化环天线,该介质天线的漏波辐射更易产生。探究了介质波导的辐射机理,并详细展示了该介质天线的设计过程:先将漏波辐射的直介质波导弯曲成单环以实现圆极化,再把单环结构拓展为双环,从而展宽天线的工作带宽。通过对比单环与双环介质天线可以发现,双环结构的轴比带宽大约是单环的3倍,且两天线在工作频段内均具有良好的右旋圆极化特性。为了验证该天线设计的有效性,利用陶瓷光固化工艺(一种三维打印技术)制作了天线实物,其实测轴比带宽为3.94~5.1 GHz,最大增益为8.6 dBic。With the continuous increase of the working frequency of RF system,dielectric antenna has drawn much attention since it would not be affected by conductor loss.This paper proposes a wideband circularly polarized(CP)dual-loop dielectric antenna,based on ceramic 3D printing technology and the leaky-wave radiation of high-permittivity dielectric waveguide operating at the cut-off region of high-order mode.Compared with the wideband CP metal loop antenna similarly working at traveling-wave state,the proposed dielectric one generates leaky-wave radiation more easily.This paper investigates the radiation mechanism of dielectric waveguide and exhibits the design process of proposed dielectric antenna in detail,which is bending the straight dielectric waveguide with leaky-wave radiation into loop structure to realized circular polarization,and transforming single loop into dual-loop structure for wider operational frequency band.It is found that the axial ratio bandwidth of the dual-loop antenna is about three times than that of the single-loop one,and both antennas show good right-handed circular polarization in respective working bands.In order to verify the validity of proposed antenna design,an antenna prototype is fabricated by using ceramic vat photopolymerization,i.e.,a kind of 3D printing technology.The measured axial ratio bandwidth covers from 3.94 to 5.1 GHz,with the maximal radiation gain of 8.6 dBic.

关 键 词：环天线 圆极化 宽带 陶瓷三维打印 

分 类 号：TN823[电子电信—信息与通信工程] V443[航空宇航科学与技术—飞行器设计]