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串联邻近耦合馈电微带天线阵列的设计
吴跃敏,汪敏,李翌璇,吴文
0
(南京理工大学 电子工程与光电技术学院,南京 210094)
摘要:
针对高增益、高效率的微带天线需求,将邻近耦合馈电引入串馈微带阵列,提出两种串联谐振微带天线阵列设计。首先研制出1??16元低副瓣串联天线阵列,工作频率35 GHz,测试得到增益为17.3 dBi,带宽4.3%,副瓣电平-17.6 dB。在上述馈电方式中引入U型谐振器及馈电缝隙,提出一种串联邻近耦合馈电的双频正交极化天线阵列,中心频率分别为4.5 GHz和5.0 GHz,两个频带内带宽分别为5.0%和7.8%,隔离良好,中心频率处增益为7.6 dBi和8.2 dBi。这种馈电方式便于组成高效率的大阵列,同时具有良好带宽,在实现多功能共口径阵列中具有独特优势。
关键词:  共口径阵列  微带天线;串联馈电;邻近耦合;正交极化
DOI:
基金项目:国家自然科学基金资助项目(61771242)
Design of series proximity-coupled microstrip antenna arrays
WU Yuemin,WANG Min,LI Yixuan,WU Wen
(School of Electronic and Optical Enginnering,Nanjing University of Science and Technology,Nanjing 210094,China)
Abstract:
To meet the requirements of high-gain and high-efficiency microstrip antennas,two series microstrip resonant antenna arrays are proposed by introducing proximity-coupled feed scheme into the series-fed arrays.A 16-element low side-lobe series array is developed with a center frequency of 35 GHz.Measured gain of 17.3 dBi,bandwidth of 4.3%,and side-lobe level of -17.6 dB have been obtained.The proximity-coupling feed is furthur improved with introducing U resonators and feeding slots,so that a novel series dual-band orthogonal-polarized antenna array is proposed.Bandwidths of 5.0%and 7.8%,and maximum gains of 7.6 dBi and 8.2 dBi have been achieved for the center frequencies of 4.5 GHz and 5.0 GHz,respectively.Good isolation between two bands is obtained.The feed scheme is convenient to form a large array with high efficiency and good bandwidth.It also has unique advantages in realizing multifunctional shared-aperture microstrip antenna arrays.
Key words:  shared-aperture array  microstrip antenna  series-fed  proximity-couple  orthogonal polarization
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