The finite element modeling of three dimensional structures is important for researchers especially in the field of antennas and other domains of electromagnetic waves. This paper presents a finite element calculation...The finite element modeling of three dimensional structures is important for researchers especially in the field of antennas and other domains of electromagnetic waves. This paper presents a finite element calculations and numerical analysis for the microstrip patch antennas. In this paper, two different designs have been modelled and analyzed and both designs are based on the rectangular patches. The feeding point of one design is inside the patch while the other design contains feeding point outside the patch is T shaped. The computational analysis showed some interesting results for radiation pattern and far field domain. For these designs, the characteristic impedance taken is 50 Ω and the operating frequency domain is 1.4 to 1.7 GHz. The microstrip patch antennas are encapsulated in the inert spherical atmosphere of 20 mm thickness containing air inside it.展开更多
基于双频段相控阵的需求,设计了一种S频段大频比双频相控阵天线单元,提出了采用微带贴片天线和印刷偶极子天线的新型组合,解决了固定阵元间距的工程背景条件下高低频的共孔径问题,并实现了高低频在实空间内均无栅瓣。加工了所设计天线...基于双频段相控阵的需求,设计了一种S频段大频比双频相控阵天线单元,提出了采用微带贴片天线和印刷偶极子天线的新型组合,解决了固定阵元间距的工程背景条件下高低频的共孔径问题,并实现了高低频在实空间内均无栅瓣。加工了所设计天线的工程样机,并对其进行了测试。测试结果表明,该双频天线在2.2~2.4 GHz和3.4~3.9 GHz频段内电压驻波系数小于1.8,低频和高频增益分别大于8 d Bi和6 d Bi,3 d B波束宽度分别大于60°和80°。展开更多
文摘The finite element modeling of three dimensional structures is important for researchers especially in the field of antennas and other domains of electromagnetic waves. This paper presents a finite element calculations and numerical analysis for the microstrip patch antennas. In this paper, two different designs have been modelled and analyzed and both designs are based on the rectangular patches. The feeding point of one design is inside the patch while the other design contains feeding point outside the patch is T shaped. The computational analysis showed some interesting results for radiation pattern and far field domain. For these designs, the characteristic impedance taken is 50 Ω and the operating frequency domain is 1.4 to 1.7 GHz. The microstrip patch antennas are encapsulated in the inert spherical atmosphere of 20 mm thickness containing air inside it.
文摘设计了一种中心频率为12.4 GHz具有宽频带高增益特性的16单元微带天线阵。采用两层介质板中间夹一层空气层、附加寄生贴片和引入探针等来展宽天线带宽;运用盒状反射板改善天线增益;对展宽带宽和提高增益的设计与传统设计方法做了对比分析。经电磁仿真软件Ansoft HFSS仿真实验并对实物天线进行测试得:相对带宽为24.91%,增益为19.31 d B,E面半功率波瓣宽度16.8°,H面半功率波瓣宽度17°。
文摘基于双频段相控阵的需求,设计了一种S频段大频比双频相控阵天线单元,提出了采用微带贴片天线和印刷偶极子天线的新型组合,解决了固定阵元间距的工程背景条件下高低频的共孔径问题,并实现了高低频在实空间内均无栅瓣。加工了所设计天线的工程样机,并对其进行了测试。测试结果表明,该双频天线在2.2~2.4 GHz和3.4~3.9 GHz频段内电压驻波系数小于1.8,低频和高频增益分别大于8 d Bi和6 d Bi,3 d B波束宽度分别大于60°和80°。
