共查询到17条相似文献,搜索用时 62 毫秒
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设计了一个中心频率为6.52GHz具有宽频带高增益特性的16单元微带天线阵。综合运用H型缝隙耦合馈电技术、插入空气层技术和在贴片天线上切角的方法展宽天线的带宽。该天线阵由两层介质板构成,采用反相馈电可抑制高次模的耦合,交叉极化电平低。使用三维电磁场仿真软件AnsoftHFSS对该天线阵进行仿真优化,并根据仿真结果做成实物加以验证。对实物的测量结果表明:天线阵仿真阻抗带宽(S11≤-10 dB)为21.5%,增益为19.85 dB;实测阻抗带宽(S11≤-10 dB)为22.5%,增益为18.8 dB。天线阵性能良好,能满足工程实际要求。 相似文献
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本文提出了在天线课程的实践教学中增加微带天线阵的设计性实验.该实验通过对天线阵的软件仿真、实物制作以及仪器测试,让学生掌握设计天线阵的思路和方法,同时增加创新性实验内容,鼓励学生自主研究.该实践教学方式较好地培养了学生的实践能力和工程应用能力. 相似文献
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本文在微带天线阵列设计中,采用孔径耦合馈电的办法,将辐射贴片层和馈电网络分层设计,可以获得令人满意的阻抗带宽。实测表明阵列相对带宽可达 20%以上,并且这种馈电方式避免了两者共面时由于尺寸限制,馈电网络难于设计的缺点,减小了互耦及交叉极化,是大型微带贴片天线阵列的一种理想结构形式。 相似文献
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提出了一款高增益低副瓣新型圆极化微带天线阵。单元天线采用叠层切角圆极化微带结构,通过八边形边界布局和顺序旋转交叠组阵技术,实现了天线阵方向性图的对称性和圆极化辐射性能的最优化;馈电网络采用威尔金森功分器和最大平坦式阻抗变换器实现不等功分宽带阻抗匹配,通过改进馈电方向寻求对称结构,简化了馈电网络的设计。制作了天线阵实物并进行了测量。测试结果表明:天线在3.2~4.6 GHz频段内S11<-10 dB,阻抗相对带宽36%;在3.8~4.5 GHz频段内顶点轴比小于3 dB,圆极化相对带宽17%;在4~4.4 GHz频段内天线增益均在15 dB以上,最高增益达17 dB。 相似文献
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本文设计了一种新颖的四单元圆极化微带天线阵。通过去掉单元贴片周围的介质,使天线阵的重量减少了54%。文中采用电磁仿真软件HFSS10进行优化与仿真,讨论了阵元间距对天线阵的增益、半功率波束宽度、旁瓣电平以及后瓣电平的影响。最后加工制作了相应的微带天线阵,测试结果与仿真吻合较好。 相似文献
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介绍了一种宽带微带贴片天线单元及2元阵列的设计方法,天线工作的中心频率为rl_5OHz(S波段)。天线单元设计中采用口径耦合理论和层叠贴片天线结构,有效增大了天线的阻抗带宽。仿真结果表明该天线阵列实际增益达到11.9dB;在2.27~2.78GHz频率范围内端口驻波比小于2,相对带宽为20.4%;交叉极化电平为-31dB,证明该天线阵具有宽频带、低交叉极化等优良性能。 相似文献
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介绍了一种新型的Ku频段宽带高增益双极化微带贴片单元及96元阵列的设计。设计中单元采用层叠贴片天线结构,提高了单元的带宽和增益,两个极化端口采用分层馈电,其中水平极化端口采用共面馈电,垂直极化端口采用探针背馈。在馈电网络的设计中引入反向馈电技术,降低了交叉极化。仿真与实测结果表明:该阵列增益达到了26 dBi,口径效率约为51%,交叉极化电平小于-30 dB,水平极化端口相对阻抗带宽达11.3%,垂直极化端口相对阻抗带宽达13.7%,两端口隔离度高于40 dB. 相似文献
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一种宽频带微带天线的设计 总被引:5,自引:0,他引:5
介绍了宽频带渐变式微带缝隙天线的工作原理、设计参数及其对电性能的影响,设计了一种结构简单的天线形式,给出了该天线工作于S、C频段的结构尺寸以及VSWR、辐射方向图的仿真和测试数据曲线,两者之间有很好的一致性,并对影响天线性能的关键参数进行了误差计算。结果表明:在加工精度可达到的范围内,对天线性能的影响不大。该天线可应用于宽频带单极化、双极化阵列天线单元或反射面天线馈源。 相似文献
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In this paper, a wideband, circularly polarized patch antenna is proposed that leverages the unidirectional resonant modes of a circular patch mounted on top of a grounded dielectric‐ferrite substrate. The proposed antenna is fed via the proximity coupling method and several parasitically coupled patches are placed on a dielectric superstrate to enhance the impedance bandwidth of the antenna. The resonant modes of the structure rotate only in the clockwise or counter clockwise directions. In the frequency range where the effective permeability of the ferrite layer is negative, the resonance frequencies of these modes differ significantly, which produces a large axial ratio (AR) bandwidth. For the proposed antenna, the numerical results show the 10 dB impedance bandwidth to be around 44% and the 3 dB axial ratio bandwidth to be higher than 64%. 相似文献
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《AEUE-International Journal of Electronics and Communications》2014,68(8):710-716
Various gap-coupled array configurations of ring microstrip antennas and rectangular slot cut ring microstrip antennas with proximity fed slot cut ring microstrip antenna for larger bandwidth and gain are proposed. The rectangular slot in ring patch reduces its orthogonal TM01 and TM02 mode resonance frequencies and along with TM10 modes of fed and parasitic ring patches, yields broadband response. The gap-coupled configuration with ring patch and slot cut ring patch yields bandwidth of nearly 430 MHz with broadside radiation pattern and peak gain of more than 9 dBi. By gap-coupling ring patches along all the edges of proximity fed pair of slot cut ring patch, a 3 × 3 ring microstrip antenna array is realized. It yields bandwidth of more than 460 MHz with peak gain of more than 10 dBi. To further improve upon the bandwidth, a 3 × 3 array of ring patches in which rectangular slot is first cut on the edges of ring patch which are gap-coupled along x-axis and further cut inside the patches which are gap-coupled along x and diagonal axes, is proposed. Both of these configurations yield bandwidth of more than 500 MHz (>45%) with a peak gain of around 10 dBi. 相似文献
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Lingjian Li 《International Journal of Electronics》2013,100(7):755-765
Microstrip antennas suffer an inherent disadvantage of narrow impedance bandwidth, normally within 5%. In this article, a single layer linear U-slot microstrip patch antenna array is designed, fabricated and characterised. The measured results agree well with the simulated, showing an enhanced impedance bandwidth (voltage standing wave ratio < 2) of 10.6%, ranging from 5.35 to 5.95 GHz, on an FR4 substrate. The antenna array has high efficiency and gain. Only a pair of sidelobes appear in the E plane radiation pattern. The reported linear array design can provide a method of expanding to 4 × N antenna array for satellite to ground communication operating at C band. 相似文献