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Coplanar waveguide fed dual-band dual-sense circular polarized square slot antenna

机译:共面波导馈电双频双感圆极化方槽天线

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摘要

A novel design of a dual-band dual-sense circularly polarized square slot antennawith two rectangular shaped parasitic patches etched on a single substrate for1.74/2.82 GHz applications is presented. A coplanar waveguide (CPW) fed linewith two horizontal branches of different lengths is used, which produce two differentfrequencies bands. However, good circular polarization (CP) performance isachieved by adjusting the size of the parasitic patches. The two branches of feedline can excite dual-band dual-sense circular polarized wave. The antenna generatesright hand circular polarization (RHCP) and left hand circular polarization(LHCP) radiation at 1.74 and 2.82 GHz, respectively. Lower band is obtained dueto 90° phase difference between currents in the two orthogonal branches of the feedline. The lower band of CP is controlled by the size of parasitic patch/element(PE2) and the upper band of CP is controlled by length of right-sided horizontalbranch of feed line. The key parameters of the design are investigated to show howto obtain dual CP with impedance matching.
机译:提出了一种新颖的双频双检测圆极化方隙缝隙天线设计,该天线在单个基板上刻有两个矩形的寄生贴片,用于1.74 / 2.82 GHz应用。使用具有两个不同长度的水平分支的共面波导(CPW)馈线 r n,它会产生两个不同的 r n频率频段。但是,通过调整寄生贴片的大小可以获得良好的圆极化(CP)性能。馈线的两个分支可以激发双频双感圆极化波。天线分别在1.74 GHz和2.82 GHz处产生右旋圆极化(RHCP)和左旋圆极化(rHCP)辐射。由于馈线两个正交分支中电流之间的相位差达到90°,因此获得了较低的带宽。 CP的下带由寄生贴片/元件的大小控制 r n(PE2),CP的上带由馈线的右侧水平线 r n分支的长度控制。研究了设计的关键参数,以说明如何获得具有阻抗匹配的双CP。

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