Transverse Permittivity Gradient (TPG) Superstrates or Lens: A Critical Perspective

机译：横向介电常数梯度（TPG）超级镜片或镜片：批判性观点

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This paper presents a quantitative comparison of superstrates with transverse permittivity gradient (STPG) when used in RCAs, as compared to stand-alone lens configurations. RCAs with TPG superstrates are often compared with lens antennas, considering the apparent structural similarity between the two. However, these two classes of antennas present inherent differences in terms of characteristics as well as principle of operation. Detailed comparisons are carried out using full-wave simulations. It was found that nearly 50% reduction in 3dB bandwidth was observed when a TPG superstrate was used as a lens antenna, as opposed to in an RCA.

机译：与独立镜头配置相比，本文介绍了在RCA中使用时具有横向介电常数梯度（STPG）的超级介质的定量比较。考虑到两者之间的表观结构相似，通常将具有TPG超级旋转的RCAS与透镜天线进行比较。然而，这两类天线在特性方面存在固有的差异以及操作原理。使用全波模拟进行详细的比较。发现当使用TPG超级晶体作为透镜天线时，观察到3DB带宽的降低近50％，而不是在RCA中。

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《IEEE International Symposium on Antennas and Propagation》|2018年|630p|共2页
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R. M. Hashmi; A. A. Baba; K. P. Esselle;
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中图分类天线;
关键词
RCAs; Lens Antennas; High-Gain; Partially Reflecting Superstrate; TPG; EBG Resonator Antenna;

机译：RCA;镜头天线;高增益;部分反映超塑;TPG;EBG谐振器天线;

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Transverse Permittivity Gradient (TPG) Superstrates or Lens: A Critical Perspective

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