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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A π/4 Bi-Orthogonal Monopole Antenna for Operation On and Beyond of the UWB Band
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A π/4 Bi-Orthogonal Monopole Antenna for Operation On and Beyond of the UWB Band

机译：π/ 4双正交单极天线，可在UWB频段上及更高频段工作

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摘要

An ultra-wideband (UWB) π/4 bi-orthogonal monopole antenna with a highly omnidirectional radiation pattern in the azimuthal plane with a quasi-independent on the frequency behavior is presented in this article. Here, it is shown that by combining two orthogonal UWB planar monopole elements rotated 45° with respect to each other in a single structure, it is possible to enhance the performance of the radiation pattern at high frequencies of the operational bandwidth without affecting the radiation pattern at lower frequencies. The measured antenna bandwidth goes from 2.82 to 16.7 GHz for a reflection coefficient lower than -10 dB. The radiation pattern remains almost omnidirectional, and it is enhanced with respect to a conventional single planar monopole antenna of similar characteristics. The basic element used for both the single and the proposed π/4 bi-orthogonal UWB planar monopole antenna has a rectangular shape, whose impedance bandwidth ratio is achieved based on the bevelling and height-width ratio techniques. Although the antenna prototype presented in this article has an operational bandwidth of 13.88 GHz, it is possible to design a UWB monopole antenna with the shape and structure proposed here, but for different bandwidths following a design methodology suggested also in this article.
机译：本文介绍了一种超宽带（UWB）π/ 4双正交单极天线，该天线在方位角平面内具有高度全向的辐射方向图，并且与频率行为近似无关。这里，示出了通过将相对于彼此旋转45°的两个正交的UWB平面单极元件组合成单个结构，可以在操作带宽的高频下增强辐射图的性能而不会影响辐射图在较低的频率。对于低于-10 dB的反射系数，测得的天线带宽从2.82到16.7 GHz。辐射方向图几乎保持全向，并且相对于具有类似特性的常规单平面单极天线而言，辐射方向图得到了增强。用于单个和提议的π/ 4双正交UWB平面单极天线的基本元件均为矩形，其阻抗带宽比是基于斜角和高宽比技术获得的。尽管本文介绍的天线原型具有13.88 GHz的工作带宽，但是可以设计具有此处提出的形状和结构的UWB单极天线，但是针对不同的带宽，也可以遵循本文提出的设计方法。

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